3871 lines
105 KiB
C++
3871 lines
105 KiB
C++
/*
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* OGLFT: A library for drawing text with OpenGL using the FreeType library
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* Copyright (C) 2002 lignum Computing, Inc. <oglft@lignumcomputing.com>
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* $Id: OGLFT.cpp,v 1.11 2003/10/01 14:21:18 allen Exp $
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <iostream>
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#include <iomanip>
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <OGLFT.h>
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#ifndef OGLFT_NO_QT
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#include <qregexp.h>
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#endif
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#include <assert.h>
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namespace OGLFT {
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// This is the static instance of the FreeType library wrapper ...
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Library Library::library;
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// ... and this is the FreeType library handle itself.
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FT_Library Library::library_;
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// The static instance above causes this constructor to be called
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// when the object module is loaded.
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Library::Library ( void )
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{
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FT_Error error = FT_Init_FreeType( &library_ );
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if ( error != 0 ) {
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std::cerr << "Could not initialize the FreeType library. Exiting." << std::endl;
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exit( 1 );
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}
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}
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Library::~Library ( void )
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{
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FT_Error error = FT_Done_FreeType( library_ );
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if ( error != 0 ) {
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std::cerr << "Could not terminate the FreeType library." << std::endl;
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}
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}
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// Return the only instance in the process
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FT_Library& Library::instance ( void )
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{
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return library_;
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}
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// Load a new face
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Face::Face ( const char* filename, float point_size, FT_UInt resolution )
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: point_size_( point_size ), resolution_( resolution )
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{
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valid_ = true; // Assume the best :-)
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FT_Face ft_face;
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FT_Error error = FT_New_Face( Library::instance(), filename, 0, &ft_face );
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if ( error != 0 ) {
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valid_ = false;
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return;
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}
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// As of FreeType 2.1: only a UNICODE charmap is automatically activated.
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// If no charmap is activated automatically, just use the first one.
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if ( ft_face->charmap == 0 && ft_face->num_charmaps > 0 )
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FT_Select_Charmap( ft_face, ft_face->charmaps[0]->encoding );
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faces_.push_back( FaceData( ft_face ) );
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init();
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}
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// Go with a face that the user has already opened.
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Face::Face ( FT_Face face, float point_size, FT_UInt resolution )
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: point_size_( point_size ), resolution_( resolution )
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{
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valid_ = true;
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// As of FreeType 2.1: only a UNICODE charmap is automatically activated.
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// If no charmap is activated automatically, just use the first one.
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if ( face->charmap == 0 && face->num_charmaps > 0 )
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FT_Select_Charmap( face, face->charmaps[0]->encoding );
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faces_.push_back( FaceData( face, false ) );
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init();
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}
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// Standard initialization behavior once the font file is opened.
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void Face::init ( void )
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{
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// By default, each glyph is compiled into a display list the first
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// time it is encountered
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compile_mode_ = COMPILE;
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// By default, all drawing is wrapped with push/pop matrix so that the
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// MODELVIEW matrix is not modified. If advance_ is set, then subsequent
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// drawings follow from the advance of the last glyph rendered.
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advance_ = false;
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// Initialize the default colors
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foreground_color_[R] = 0.;
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foreground_color_[G] = 0.;
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foreground_color_[B] = 0.;
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foreground_color_[A] = 1.;
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background_color_[R] = 1.;
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background_color_[G] = 1.;
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background_color_[B] = 1.;
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background_color_[A] = 0.;
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// The default positioning of the text is at the origin of the first glyph
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horizontal_justification_ = ORIGIN;
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vertical_justification_ = BASELINE;
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// By default, strings are rendered in their nominal direction
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string_rotation_ = 0;
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// setCharacterRotationReference calls the virtual function clearCaches()
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// so it is up to a subclass to set the real default
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rotation_reference_glyph_ = 0;
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rotation_reference_face_ = 0;
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rotation_offset_y_ = 0.;
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}
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Face::~Face ( void )
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{
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for ( unsigned int i = 0; i < faces_.size(); i++ )
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if ( faces_[i].free_on_exit_ )
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FT_Done_Face( faces_[i].face_ );
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}
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// Add another Face to select characters from
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bool Face::addAuxiliaryFace ( const char* filename )
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{
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FT_Face ft_face;
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FT_Error error = FT_New_Face( Library::instance(), filename, 0, &ft_face );
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if ( error != 0 )
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return false;
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faces_.push_back( FaceData( ft_face ) );
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setCharSize();
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return true;
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}
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// Add another Face to select characters from
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bool Face::addAuxiliaryFace ( FT_Face face )
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{
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faces_.push_back( FaceData( face, false ) );
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setCharSize();
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return true;
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}
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// Note: Changing the point size also clears the display list cache
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void Face::setPointSize ( float point_size )
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{
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if ( point_size != point_size_ ) {
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point_size_ = point_size;
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clearCaches();
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setCharSize();
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}
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}
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// Note: Changing the resolution also clears the display list cache
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void Face::setResolution ( FT_UInt resolution )
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{
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if ( resolution != resolution_ ) {
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resolution_ = resolution;
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clearCaches();
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setCharSize();
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}
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}
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// Note: Changing the background color also clears the display list cache.
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void Face::setBackgroundColor ( GLfloat red, GLfloat green, GLfloat blue,
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GLfloat alpha )
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{
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if ( background_color_[R] != red ||
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background_color_[G] != green ||
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background_color_[B] != blue ||
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background_color_[A] != alpha ) {
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background_color_[R] = red;
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background_color_[G] = green;
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background_color_[B] = blue;
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background_color_[A] = alpha;
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clearCaches();
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}
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}
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// Note: Changing the foreground color also clears the display list cache.
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void Face::setForegroundColor ( GLfloat red, GLfloat green, GLfloat blue,
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GLfloat alpha )
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{
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if ( foreground_color_[R] != red ||
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foreground_color_[G] != green ||
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foreground_color_[B] != blue ||
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foreground_color_[A] != alpha ) {
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foreground_color_[R] = red;
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foreground_color_[G] = green;
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foreground_color_[B] = blue;
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foreground_color_[A] = alpha;
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clearCaches();
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}
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}
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// Note: Changing the foreground color also clears the display list cache.
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void Face::setForegroundColor ( const GLfloat foreground_color[4] )
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{
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if ( foreground_color_[R] != foreground_color[R] ||
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foreground_color_[G] != foreground_color[G] ||
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foreground_color_[B] != foreground_color[B] ||
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foreground_color_[A] != foreground_color[A] ) {
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foreground_color_[R] = foreground_color[R];
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foreground_color_[G] = foreground_color[G];
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foreground_color_[B] = foreground_color[B];
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foreground_color_[A] = foreground_color[A];
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clearCaches();
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}
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}
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// Note: Changing the background color also clears the display list cache.
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void Face::setBackgroundColor ( const GLfloat background_color[4] )
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{
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if ( background_color_[R] != background_color[R] ||
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background_color_[G] != background_color[G] ||
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background_color_[B] != background_color[B] ||
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background_color_[A] != background_color[A] ) {
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background_color_[R] = background_color[R];
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background_color_[G] = background_color[G];
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background_color_[B] = background_color[B];
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background_color_[A] = background_color[A];
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clearCaches();
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}
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}
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#ifndef OGLFT_NO_QT
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// Note: Changing the foreground color also clears the display list cache.
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void Face::setForegroundColor ( const QRgb foreground_rgba )
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{
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GLfloat foreground_color[4];
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foreground_color[R] = qRed( foreground_rgba ) / 255.;
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foreground_color[G] = qGreen( foreground_rgba ) / 255.;
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foreground_color[B] = qBlue( foreground_rgba ) / 255.;
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foreground_color[A] = qAlpha( foreground_rgba ) / 255.;
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if ( foreground_color_[R] != foreground_color[R] ||
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foreground_color_[G] != foreground_color[G] ||
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foreground_color_[B] != foreground_color[B] ||
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foreground_color_[A] != foreground_color[A] ) {
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foreground_color_[R] = foreground_color[R];
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foreground_color_[G] = foreground_color[G];
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foreground_color_[B] = foreground_color[B];
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foreground_color_[A] = foreground_color[A];
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clearCaches();
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}
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}
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// Note: Changing the background color also clears the display list cache.
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void Face::setBackgroundColor ( const QRgb background_rgba )
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{
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GLfloat background_color[4];
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background_color[R] = qRed( background_rgba ) / 255.;
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background_color[G] = qGreen( background_rgba ) / 255.;
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background_color[B] = qBlue( background_rgba ) / 255.;
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background_color[A] = qAlpha( background_rgba ) / 255.;
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if ( background_color_[R] != background_color[R] ||
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background_color_[G] != background_color[G] ||
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background_color_[B] != background_color[B] ||
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background_color_[A] != background_color[A] ) {
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background_color_[R] = background_color[R];
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background_color_[G] = background_color[G];
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background_color_[B] = background_color[B];
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background_color_[A] = background_color[A];
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clearCaches();
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}
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}
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#endif /* OGLFT_NO_QT */
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// Note: Changing the string rotation angle clears the display list cache
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void Face::setStringRotation ( GLfloat string_rotation )
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{
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if ( string_rotation != string_rotation_ ) {
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string_rotation_ = string_rotation;
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clearCaches();
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// Note that this affects ALL glyphs accessed through
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// the Face, both the vector and the raster glyphs. Very nice!
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if ( string_rotation_ != 0. ) {
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float angle;
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if ( string_rotation_ < 0. ) {
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angle = 360. - fmod( fabs( string_rotation_ ), 360.f );
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}
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else {
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angle = fmod( string_rotation_, 360.f );
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}
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FT_Matrix rotation_matrix;
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FT_Vector sinus;
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FT_Vector_Unit( &sinus, (FT_Angle)(angle * 0x10000L) );
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rotation_matrix.xx = sinus.x;
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rotation_matrix.xy = -sinus.y;
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rotation_matrix.yx = sinus.y;
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rotation_matrix.yy = sinus.x;
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for ( unsigned int i = 0; i < faces_.size(); i++ )
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FT_Set_Transform( faces_[i].face_, &rotation_matrix, 0 );
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}
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else
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for ( unsigned int i = 0; i < faces_.size(); i++ )
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FT_Set_Transform( faces_[i].face_, 0, 0 );
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}
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}
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// Note: Changing the rotation reference character clears the display list cache.
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void Face::setCharacterRotationReference ( unsigned char c )
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{
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unsigned int f;
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FT_UInt glyph_index = 0;
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for ( f = 0; f < faces_.size(); f++ ) {
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glyph_index = FT_Get_Char_Index( faces_[f].face_, c );
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if ( glyph_index != 0 ) break;
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}
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if ( f < faces_.size() && glyph_index != rotation_reference_glyph_ ) {
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FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
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FT_LOAD_DEFAULT );
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if ( error != 0 ) return;
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rotation_reference_glyph_ = glyph_index;
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rotation_reference_face_ = faces_[f].face_;
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setRotationOffset();
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clearCaches();
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}
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}
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BBox Face::measure ( const char* s )
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{
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BBox bbox;
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char c;
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if ( ( c = *s++ ) != 0 ) {
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bbox = measure( c );
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for ( c = *s; c != 0; c = *++s ) {
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BBox char_bbox = measure( c );
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bbox += char_bbox;
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/* std::cerr << "adding " << c
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<< " y_max_: " << bbox.y_max_ << " y_min: " << bbox.y_min_
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<< " advance.dy: " << bbox.advance_.dy_
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<< " advance.dx: " << bbox.advance_.dx_
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<< std::endl;
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*/
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assert (bbox.y_max_ - bbox.y_min_ != 0.);
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}
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}
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return bbox;
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}
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BBox Face::measureRaw ( const char* s )
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{
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BBox bbox;
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for ( char c = *s; c != 0; c = *++s ) {
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BBox char_bbox;
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unsigned int f;
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FT_UInt glyph_index = 0;
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for ( f = 0; f < faces_.size(); f++ ) {
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glyph_index = FT_Get_Char_Index( faces_[f].face_, c );
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if ( glyph_index != 0 ) break;
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}
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if ( glyph_index == 0 ) continue;
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FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
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FT_LOAD_DEFAULT );
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if ( error != 0 ) continue;
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FT_Glyph glyph;
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error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
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if ( error != 0 ) continue;
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FT_BBox ft_bbox;
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FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
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FT_Done_Glyph( glyph );
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char_bbox = ft_bbox;
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char_bbox.advance_ = faces_[f].face_->glyph->advance;
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bbox += char_bbox;
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}
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return bbox;
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}
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#ifndef OGLFT_NO_QT
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BBox Face::measure ( const QString& s )
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{
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BBox bbox;
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if ( s.length() > 0 ) {
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bbox = measure( s.at( 0 ) );
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for ( unsigned int i = 1; i < s.length(); i++ ) {
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BBox char_bbox = measure( s.at( i ) );
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bbox += char_bbox;
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}
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}
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return bbox;
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}
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BBox Face::measure ( const QString& format, double number )
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{
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return measure( format_number( format, number ) );
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}
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BBox Face::measureRaw ( const QString& s )
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{
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BBox bbox;
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for ( unsigned int i = 0; i < s.length(); i++ ) {
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BBox char_bbox;
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unsigned int f;
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FT_UInt glyph_index = 0;
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for ( f = 0; f < faces_.size(); f++ ) {
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glyph_index = FT_Get_Char_Index( faces_[f].face_, s.at( i ).unicode() );
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if ( glyph_index != 0 ) break;
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}
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if ( glyph_index == 0 ) {
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continue;
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}
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FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
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FT_LOAD_DEFAULT );
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if ( error != 0 ) continue;
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FT_Glyph glyph;
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error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
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if ( error != 0 ) continue;
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FT_BBox ft_bbox;
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FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
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FT_Done_Glyph( glyph );
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char_bbox = ft_bbox;
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char_bbox.advance_ = faces_[f].face_->glyph->advance;
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bbox += char_bbox;
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}
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return bbox;
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}
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#endif /* OGLFT_NO_QT */
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// Measure the bounding box as if the (latin1) string were not rotated
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BBox Face::measure_nominal ( const char* s )
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{
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if ( string_rotation_ == 0. )
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return measure( s );
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for ( unsigned int f = 0; f < faces_.size(); f++ )
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FT_Set_Transform( faces_[f].face_, 0, 0 );
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BBox bbox = measure( s );
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float angle;
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if ( string_rotation_ < 0. ) {
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angle = 360. - fmod( fabs( string_rotation_ ), 360.f );
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}
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else {
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angle = fmod( string_rotation_, 360.f );
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}
|
|
|
|
FT_Matrix rotation_matrix;
|
|
FT_Vector sinus;
|
|
|
|
FT_Vector_Unit( &sinus, (FT_Angle)(angle * 0x10000L) );
|
|
|
|
rotation_matrix.xx = sinus.x;
|
|
rotation_matrix.xy = -sinus.y;
|
|
rotation_matrix.yx = sinus.y;
|
|
rotation_matrix.yy = sinus.x;
|
|
|
|
for ( unsigned int f = 0; f < faces_.size(); f++ )
|
|
FT_Set_Transform( faces_[f].face_, &rotation_matrix, 0 );
|
|
|
|
return bbox;
|
|
}
|
|
|
|
#ifndef OGLFT_NO_QT
|
|
// Measure the bounding box as if the (UNICODE) string were not rotated
|
|
|
|
BBox Face::measure_nominal ( const QString& s )
|
|
{
|
|
if ( string_rotation_ == 0. )
|
|
return measure( s );
|
|
|
|
for ( unsigned int f = 0; f < faces_.size(); f++ )
|
|
FT_Set_Transform( faces_[f].face_, 0, 0 );
|
|
|
|
BBox bbox = measure( s );
|
|
|
|
float angle;
|
|
if ( string_rotation_ < 0. ) {
|
|
angle = 360. - fmod( fabs( string_rotation_ ), 360.f );
|
|
}
|
|
else {
|
|
angle = fmod( string_rotation_, 360.f );
|
|
}
|
|
|
|
FT_Matrix rotation_matrix;
|
|
FT_Vector sinus;
|
|
|
|
FT_Vector_Unit( &sinus, (FT_Angle)(angle * 0x10000L) );
|
|
|
|
rotation_matrix.xx = sinus.x;
|
|
rotation_matrix.xy = -sinus.y;
|
|
rotation_matrix.yx = sinus.y;
|
|
rotation_matrix.yy = sinus.x;
|
|
|
|
for ( unsigned int f = 0; f < faces_.size(); f++ )
|
|
FT_Set_Transform( faces_[f].face_, &rotation_matrix, 0 );
|
|
|
|
return bbox;
|
|
}
|
|
|
|
// Format the number per the given format. Mostly pointless
|
|
// for the standard formats, e.g. %12e. You can use the regular
|
|
// Qt functions to format such a string and avoid the parsing
|
|
// which is done here.
|
|
|
|
QString Face::format_number ( const QString& format, double number )
|
|
{
|
|
// This regexp says:
|
|
// 1. optionally match any thing up to a format,
|
|
// 2. the optional format (%...), and
|
|
// 3. optionally anything after it.
|
|
// Note that since everything is optional, the match always succeeds.
|
|
QRegExp format_regexp("((?:[^%]|%%)*)(%[0-9]*\\.?[0-9]*[efgp])?((?:[^%]|%%)*)");
|
|
/*int pos = */ format_regexp.search( format );
|
|
|
|
QStringList list = format_regexp.capturedTexts();
|
|
|
|
QStringList::Iterator it = list.begin();
|
|
|
|
it = list.remove( it ); // Remove the "matched" string, leaving the pieces
|
|
|
|
if ( it == list.end() ) return QString::null; // Probably an error
|
|
|
|
// Extract each piece from the list
|
|
|
|
QString prefix, value_format, postfix;
|
|
char type = '\0';
|
|
|
|
if ( !(*it).isEmpty() )
|
|
prefix = *it;
|
|
|
|
++it;
|
|
|
|
if ( it != list.end() ) {
|
|
if ( !(*it).isEmpty() ) {
|
|
// Reparse this to extract the details of the format
|
|
QRegExp specifier_regexp( "([0-9]*)\\.?([0-9]*)([efgp])" );
|
|
(void)specifier_regexp.search( *it );
|
|
QStringList specifier_list = specifier_regexp.capturedTexts();
|
|
|
|
QStringList::Iterator sit = specifier_list.begin();
|
|
|
|
sit = specifier_list.remove( sit );
|
|
|
|
int width = (*sit).toInt();
|
|
++sit;
|
|
int precision = (*sit).toInt();
|
|
++sit;
|
|
|
|
type = (*sit).at(0).latin1();
|
|
|
|
// The regular formats just use Qt's number formatting capability
|
|
if ( type == 'e' || type == 'f' || type == 'g' )
|
|
value_format = QString( "%1" ).arg( number, width, type, precision );
|
|
|
|
// For the fraction, though, we have to convert it the special
|
|
// UNICODE encoding
|
|
else if ( type == 'p' ) {
|
|
// Fixed for now...
|
|
if ( fabs( number ) < 1./256. )
|
|
value_format = "0";
|
|
else {
|
|
// Extract the integral part
|
|
int a = (int)number;
|
|
|
|
if ( a != 0 )
|
|
value_format = QString::number( a );
|
|
|
|
// Extract the fractional part: NOTE: THIS IS LIMITED TO
|
|
// REPRESENTING ALL FRACTIONS AS n/256
|
|
int b = (int)rint( 256. * fabs( number - a ) );
|
|
|
|
// If b is exactly 256, then the original number was
|
|
// essentially an integer (to within 1/256-th)
|
|
if ( b == 256 )
|
|
value_format = QString::number( rint( number ) );
|
|
|
|
else if ( b != 0 ) {
|
|
int c = 256;
|
|
// Remove common factors of two from the numerator and denominator
|
|
for ( ; ( b & 0x1 ) == 0; b >>= 1, c >>= 1 );
|
|
|
|
// Format the numerator and shift to 0xE000 sequence
|
|
QString numerator = QString::number( b );
|
|
for ( uint i = 0; i < numerator.length(); i++ ) {
|
|
numerator.at(i) = QChar( numerator.at(i).unicode() -
|
|
QChar('0').unicode() +
|
|
0xE000 );
|
|
}
|
|
value_format += numerator;
|
|
value_format += QChar( 0xE00a ); // The '/'
|
|
// Format the denominator and shift to 0xE010 sequence
|
|
QString denominator = QString::number( c );
|
|
for ( uint i = 0; i < denominator.length(); i++ ) {
|
|
denominator.at(i) = QChar( denominator.at(i).unicode() -
|
|
QChar('0').unicode() +
|
|
0xE010 );
|
|
}
|
|
value_format += denominator;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
++it;
|
|
|
|
if ( it != list.end() && !(*it).isEmpty() )
|
|
postfix = *it;
|
|
}
|
|
|
|
return prefix + value_format + postfix;
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
|
|
// Compile a (latin1) string into a display list
|
|
|
|
GLuint Face::compile ( const char* s )
|
|
{
|
|
// First, make sure all the characters in the string are themselves
|
|
// in display lists
|
|
const char* s_tmp = s;
|
|
|
|
for ( char c = *s_tmp; c != 0; c = *++s_tmp ) {
|
|
compile( c );
|
|
}
|
|
|
|
GLuint dlist = glGenLists( 1 );
|
|
glNewList( dlist, GL_COMPILE );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
if ( !advance_ )
|
|
glPushMatrix();
|
|
|
|
draw( s );
|
|
|
|
if ( !advance_ )
|
|
glPopMatrix();
|
|
|
|
glEndList();
|
|
|
|
return dlist;
|
|
}
|
|
#ifndef OGLFT_NO_QT
|
|
// Compile a (UNICODE) string into a display list
|
|
|
|
GLuint Face::compile ( const QString& s )
|
|
{
|
|
// First, make sure all the characters in the string are themselves
|
|
// in display lists
|
|
for ( unsigned int i = 0; i < s.length(); i++ ) {
|
|
compile( s.at( i ) );
|
|
}
|
|
|
|
GLuint dlist = glGenLists( 1 );
|
|
glNewList( dlist, GL_COMPILE );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
if ( !advance_ )
|
|
glPushMatrix();
|
|
|
|
draw( s );
|
|
|
|
if ( !advance_ )
|
|
glPopMatrix();
|
|
|
|
glEndList();
|
|
|
|
return dlist;
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
// Compile a (latin1) character glyph into a display list and cache
|
|
// it for later
|
|
|
|
GLuint Face::compile ( unsigned char c )
|
|
{
|
|
// See if we've done it already
|
|
|
|
GDLCI fgi = glyph_dlists_.find( c );
|
|
|
|
if ( fgi != glyph_dlists_.end() )
|
|
return fgi->second;
|
|
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return 0;
|
|
|
|
GLuint dlist = compileGlyph( faces_[f].face_, glyph_index );
|
|
|
|
glyph_dlists_[ c ] = dlist;
|
|
|
|
return dlist;
|
|
}
|
|
|
|
#ifndef OGLFT_NO_QT
|
|
// Compile a (UNICODE) character glyph into a display list and cache
|
|
// it for later
|
|
|
|
GLuint Face::compile ( const QChar c )
|
|
{
|
|
// See if we've done it already
|
|
|
|
GDLCI fgi = glyph_dlists_.find( c.unicode() );
|
|
|
|
if ( fgi != glyph_dlists_.end() )
|
|
return fgi->second;
|
|
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c.unicode() );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return 0;
|
|
|
|
GLuint dlist = compileGlyph( faces_[f].face_, glyph_index );
|
|
|
|
glyph_dlists_[ c.unicode() ] = dlist;
|
|
|
|
return dlist;
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
// Assume the MODELVIEW matrix is already set and draw the (latin1)
|
|
// string. Note: this routine now ignores almost all settings:
|
|
// including the position (both modelview and raster), color,
|
|
// justification and advance settings. Consider this to be the raw
|
|
// drawing routine for which you are responsible for most of the
|
|
// setup.
|
|
|
|
void Face::draw ( const char* s )
|
|
{
|
|
DLCI character_display_list = character_display_lists_.begin();
|
|
|
|
for ( char c = *s; c != 0; c = *++s ) {
|
|
|
|
if ( character_display_list != character_display_lists_.end() ) {
|
|
glCallList( *character_display_list );
|
|
character_display_list++;
|
|
}
|
|
|
|
draw( c );
|
|
}
|
|
}
|
|
#ifndef OGLFT_NO_QT
|
|
// Assume the MODELVIEW matrix is already set and draw the (UNICODE)
|
|
// string. Note: this routine now ignores almost all settings:
|
|
// including the position (both modelview and raster), color,
|
|
// justification and advance settings. Consider this to be the raw
|
|
// drawing routine for which you are responsible for most of the
|
|
// setup.
|
|
|
|
void Face::draw ( const QString& s )
|
|
{
|
|
DLCI character_display_list = character_display_lists_.begin();
|
|
|
|
for ( unsigned int i = 0; i < s.length(); i++ ) {
|
|
|
|
if ( character_display_list != character_display_lists_.end() ) {
|
|
glCallList( *character_display_list );
|
|
character_display_list++;
|
|
}
|
|
|
|
draw( s.at( i ) );
|
|
}
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
|
|
// Assume the MODELVIEW matrix is already setup and draw the
|
|
// (latin1) character.
|
|
|
|
void Face::draw ( unsigned char c )
|
|
{
|
|
// See if we've done it already
|
|
|
|
GDLCI fgi = glyph_dlists_.find( c );
|
|
|
|
if ( fgi != glyph_dlists_.end( ) ) {
|
|
glCallList( fgi->second );
|
|
return;
|
|
}
|
|
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return;
|
|
|
|
// Otherwise, either compile it (and call it) or ...
|
|
|
|
else if ( compile_mode_ == COMPILE ) {
|
|
GLuint dlist = compile( c );
|
|
glCallList( dlist );
|
|
}
|
|
|
|
// ... render it immediately
|
|
|
|
else {
|
|
renderGlyph( faces_[f].face_, glyph_index );
|
|
}
|
|
}
|
|
#ifndef OGLFT_NO_QT
|
|
// Assume the MODELVIEW matrix is already setup and draw the
|
|
// (UNICODE) character.
|
|
|
|
void Face::draw ( const QChar c )
|
|
{
|
|
// See if we've done it already
|
|
|
|
GDLCI fgi = glyph_dlists_.find( c.unicode() );
|
|
|
|
if ( fgi != glyph_dlists_.end( ) ) {
|
|
glCallList( fgi->second );
|
|
return;
|
|
}
|
|
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c.unicode() );
|
|
if ( glyph_index != 0 ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return;
|
|
|
|
// Otherwise, either compile it (and call it) or ...
|
|
|
|
if ( compile_mode_ == COMPILE ) {
|
|
GLuint dlist = compile( c );
|
|
glCallList( dlist );
|
|
}
|
|
|
|
// ... render it immediately
|
|
|
|
else {
|
|
renderGlyph( faces_[f].face_, glyph_index );
|
|
}
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
// Draw the (latin1) character at the given position. The MODELVIEW
|
|
// matrix is modified by the glyph advance.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, unsigned char c )
|
|
{
|
|
glTranslatef( x, y, 0. );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( c );
|
|
}
|
|
|
|
// Draw the (latin1) character at the given position. The MODELVIEW
|
|
// matrix is modified by the glyph advance.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, GLfloat z, unsigned char c )
|
|
{
|
|
glTranslatef( x, y, z );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( c );
|
|
}
|
|
#ifndef OGLFT_NO_QT
|
|
// Draw the (UNICODE) character at the given position. The MODELVIEW
|
|
// matrix is modified by the glyph advance.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, QChar c )
|
|
{
|
|
glTranslatef( x, y, 0. );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( c );
|
|
}
|
|
|
|
// Draw the (UNICODE) character at the given position. The MODELVIEW
|
|
// matrix is modified by the glyph advance.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, GLfloat z, QChar c )
|
|
{
|
|
glTranslatef( x, y, z );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( c );
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
|
|
// Draw the (latin1) string at the given position.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, const char* s )
|
|
{
|
|
if ( !advance_ )
|
|
glPushMatrix();
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE ) {
|
|
glPushMatrix();
|
|
|
|
BBox bbox = measure_nominal( s );
|
|
|
|
GLfloat dx = 0, dy = 0;
|
|
|
|
switch ( horizontal_justification_ ) {
|
|
case LEFT:
|
|
dx = -bbox.x_min_; break;
|
|
case CENTER:
|
|
dx = -( bbox.x_min_ + bbox.x_max_ ) / 2.; break;
|
|
case RIGHT:
|
|
dx = -bbox.x_max_; break;
|
|
default:
|
|
break;
|
|
}
|
|
switch ( vertical_justification_ ) {
|
|
case BOTTOM:
|
|
dy = -bbox.y_min_; break;
|
|
case MIDDLE:
|
|
dy = -( bbox.y_min_ + bbox.y_max_ ) / 2.; break;
|
|
case TOP:
|
|
dy = -bbox.y_max_; break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// There is probably a less expensive way to compute this
|
|
|
|
glRotatef( string_rotation_, 0., 0., 1. );
|
|
glTranslatef( dx, dy, 0 );
|
|
glRotatef( -string_rotation_, 0., 0., 1. );
|
|
}
|
|
|
|
glTranslatef( x, y, 0. );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( s );
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE )
|
|
glPopMatrix();
|
|
|
|
if ( !advance_ )
|
|
glPopMatrix();
|
|
}
|
|
|
|
// Draw the (latin1) string at the given position.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, GLfloat z, const char* s )
|
|
{
|
|
if ( !advance_ )
|
|
glPushMatrix();
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE ) {
|
|
glPushMatrix();
|
|
|
|
BBox bbox = measure_nominal( s );
|
|
|
|
GLfloat dx = 0, dy = 0;
|
|
|
|
switch ( horizontal_justification_ ) {
|
|
case LEFT:
|
|
dx = -bbox.x_min_; break;
|
|
case CENTER:
|
|
dx = -( bbox.x_min_ + bbox.x_max_ ) / 2.; break;
|
|
case RIGHT:
|
|
dx = -bbox.x_max_; break;
|
|
default:
|
|
break;
|
|
}
|
|
switch ( vertical_justification_ ) {
|
|
case BOTTOM:
|
|
dy = -bbox.y_min_; break;
|
|
case MIDDLE:
|
|
dy = -( bbox.y_min_ + bbox.y_max_ ) / 2.; break;
|
|
case TOP:
|
|
dy = -bbox.y_max_; break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// There is probably a less expensive way to compute this
|
|
|
|
glRotatef( string_rotation_, 0., 0., 1. );
|
|
glTranslatef( dx, dy, 0 );
|
|
glRotatef( -string_rotation_, 0., 0., 1. );
|
|
}
|
|
|
|
glTranslatef( x, y, z );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( s );
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE )
|
|
glPopMatrix();
|
|
|
|
if ( !advance_ )
|
|
glPopMatrix();
|
|
}
|
|
|
|
#ifndef OGLFT_NO_QT
|
|
// Draw the (UNICODE) string at the given position.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, const QString& s )
|
|
{
|
|
if ( !advance_ )
|
|
glPushMatrix();
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE ) {
|
|
glPushMatrix();
|
|
|
|
BBox bbox = measure_nominal( s );
|
|
|
|
GLfloat dx = 0, dy = 0;
|
|
|
|
switch ( horizontal_justification_ ) {
|
|
case LEFT:
|
|
dx = -bbox.x_min_; break;
|
|
case CENTER:
|
|
dx = -( bbox.x_min_ + bbox.x_max_ ) / 2.; break;
|
|
case RIGHT:
|
|
dx = -bbox.x_max_; break;
|
|
}
|
|
switch ( vertical_justification_ ) {
|
|
case BOTTOM:
|
|
dy = -bbox.y_min_; break;
|
|
case MIDDLE:
|
|
dy = -( bbox.y_min_ + bbox.y_max_ ) / 2.; break;
|
|
case TOP:
|
|
dy = -bbox.y_max_; break;
|
|
}
|
|
|
|
// There is probably a less expensive way to compute this
|
|
|
|
glRotatef( string_rotation_, 0., 0., 1. );
|
|
glTranslatef( dx, dy, 0 );
|
|
glRotatef( -string_rotation_, 0., 0., 1. );
|
|
}
|
|
|
|
glTranslatef( x, y, 0. );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( s );
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE )
|
|
glPopMatrix();
|
|
|
|
if ( !advance_ )
|
|
glPopMatrix();
|
|
}
|
|
|
|
// Draw the (UNICODE) string at the given position.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, GLfloat z, const QString& s )
|
|
{
|
|
if ( !advance_ )
|
|
glPushMatrix();
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE ) {
|
|
glPushMatrix();
|
|
|
|
// In 3D, we need to exert more care in the computation of the
|
|
// bounding box of the text. NOTE: Needs to be fixed up for
|
|
// polygonal faces, too...
|
|
|
|
BBox bbox;
|
|
// Code from measure_nominal, but changed to use measureRaw instead
|
|
if ( string_rotation_ == 0. )
|
|
bbox = measureRaw( s );
|
|
|
|
else {
|
|
// Undo rotation
|
|
for ( unsigned int f = 0; f < faces_.size(); f++ )
|
|
FT_Set_Transform( faces_[f].face_, 0, 0 );
|
|
|
|
bbox = measureRaw( s );
|
|
|
|
// Redo rotation
|
|
float angle;
|
|
if ( string_rotation_ < 0. ) {
|
|
angle = 360. - fmod( fabs( string_rotation_ ), 360.f );
|
|
}
|
|
else {
|
|
angle = fmod( string_rotation_, 360.f );
|
|
}
|
|
|
|
FT_Matrix rotation_matrix;
|
|
FT_Vector sinus;
|
|
|
|
FT_Vector_Unit( &sinus, (FT_Angle)(angle * 0x10000L) );
|
|
|
|
rotation_matrix.xx = sinus.x;
|
|
rotation_matrix.xy = -sinus.y;
|
|
rotation_matrix.yx = sinus.y;
|
|
rotation_matrix.yy = sinus.x;
|
|
|
|
for ( unsigned int f = 0; f < faces_.size(); f++ )
|
|
FT_Set_Transform( faces_[f].face_, &rotation_matrix, 0 );
|
|
}
|
|
|
|
// Determine the offset into the bounding box which will appear
|
|
// at the user's specified position.
|
|
GLfloat dx = 0, dy = 0;
|
|
switch ( horizontal_justification_ ) {
|
|
case LEFT:
|
|
dx = bbox.x_min_; break;
|
|
case CENTER:
|
|
dx = ( bbox.x_min_ + bbox.x_max_ ) / 2; break;
|
|
case RIGHT:
|
|
dx = bbox.x_max_; break;
|
|
}
|
|
switch ( vertical_justification_ ) {
|
|
case BOTTOM:
|
|
dy = bbox.y_min_; break;
|
|
case MIDDLE:
|
|
dy = ( bbox.y_min_ + bbox.y_max_ ) /2; break;
|
|
case TOP:
|
|
dy = bbox.y_max_; break;
|
|
}
|
|
|
|
// **Now** rotate these coordinates around into 3D modeling coordinates!
|
|
GLint viewport[4];
|
|
GLdouble modelview[16], projection[16];
|
|
|
|
glGetIntegerv( GL_VIEWPORT, viewport );
|
|
glGetDoublev( GL_MODELVIEW_MATRIX, modelview );
|
|
glGetDoublev( GL_PROJECTION_MATRIX, projection );
|
|
|
|
GLdouble x0, y0, z0;
|
|
gluUnProject( 0, 0, 0, modelview, projection, viewport, &x0, &y0, &z0 );
|
|
|
|
GLdouble dx_m, dy_m, dz_m;
|
|
gluUnProject( dx, dy, 0., modelview, projection, viewport,&dx_m,&dy_m,&dz_m );
|
|
|
|
glTranslated( x0-dx_m, y0-dy_m, z0-dz_m );
|
|
}
|
|
|
|
glTranslatef( x, y, z );
|
|
|
|
glColor4f( foreground_color_[R], foreground_color_[G], foreground_color_[B],
|
|
foreground_color_[A] );
|
|
|
|
glRasterPos2i( 0, 0 );
|
|
|
|
draw( s );
|
|
|
|
if ( horizontal_justification_ != ORIGIN ||
|
|
vertical_justification_ != BASELINE )
|
|
glPopMatrix();
|
|
|
|
if ( !advance_ )
|
|
glPopMatrix();
|
|
}
|
|
|
|
// Draw the number at the given position per the given format.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, const QString& format, double number )
|
|
{
|
|
draw( x, y, format_number( format, number ) );
|
|
}
|
|
|
|
// Draw the number at the given position per the given format.
|
|
|
|
void Face::draw ( GLfloat x, GLfloat y, GLfloat z, const QString& format,
|
|
double number )
|
|
{
|
|
draw( x, y, z, format_number( format, number ) );
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
|
|
Raster::Raster ( const char* filename, float point_size, FT_UInt resolution )
|
|
: Face( filename, point_size, resolution )
|
|
{
|
|
if ( !isValid() ) return;
|
|
|
|
init();
|
|
}
|
|
|
|
Raster::Raster ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Face( face, point_size, resolution )
|
|
{
|
|
init();
|
|
}
|
|
|
|
void Raster::init ( void )
|
|
{
|
|
character_rotation_z_ = 0;
|
|
|
|
setCharSize();
|
|
|
|
setCharacterRotationReference( 'o' );
|
|
}
|
|
|
|
Raster::~Raster ( void )
|
|
{
|
|
clearCaches();
|
|
}
|
|
|
|
void Raster::setCharacterRotationZ ( GLfloat character_rotation_z )
|
|
{
|
|
if ( character_rotation_z != character_rotation_z_ ) {
|
|
character_rotation_z_ = character_rotation_z;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
double Raster::height ( void ) const
|
|
{
|
|
if ( faces_[0].face_->height > 0 )
|
|
return faces_[0].face_->height / 64.;
|
|
else
|
|
return faces_[0].face_->size->metrics.y_ppem;
|
|
}
|
|
|
|
BBox Raster::measure ( unsigned char c )
|
|
{
|
|
BBox bbox;
|
|
// For starters, just get the unscaled glyph bounding box
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return bbox;
|
|
|
|
FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
|
|
FT_LOAD_DEFAULT );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_Glyph glyph;
|
|
error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_BBox ft_bbox;
|
|
FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
bbox = ft_bbox;
|
|
bbox.advance_ = faces_[f].face_->glyph->advance;
|
|
|
|
// In order to be accurate regarding the placement of text not
|
|
// aligned at the glyph's origin (CENTER/MIDDLE), the bounding box
|
|
// of the raster format has to be projected back into the
|
|
// view's coordinates
|
|
|
|
GLint viewport[4];
|
|
GLdouble modelview[16], projection[16];
|
|
|
|
glGetIntegerv( GL_VIEWPORT, viewport );
|
|
glGetDoublev( GL_MODELVIEW_MATRIX, modelview );
|
|
glGetDoublev( GL_PROJECTION_MATRIX, projection );
|
|
|
|
// Well, first we have to get the Origin, since that is the basis
|
|
// of the bounding box
|
|
GLdouble x0, y0, z0;
|
|
gluUnProject( 0., 0., 0., modelview, projection, viewport, &x0, &y0, &z0 );
|
|
|
|
GLdouble x, y, z;
|
|
gluUnProject( bbox.x_min_, bbox.y_min_, 0., modelview, projection, viewport,
|
|
&x, &y, &z );
|
|
bbox.x_min_ = x - x0;
|
|
bbox.y_min_ = y - y0;
|
|
|
|
gluUnProject( bbox.x_max_, bbox.y_max_, 0., modelview, projection, viewport,
|
|
&x, &y, &z );
|
|
bbox.x_max_ = x - x0;
|
|
bbox.y_max_ = y - y0;
|
|
|
|
gluUnProject( bbox.advance_.dx_, bbox.advance_.dy_, 0., modelview, projection,
|
|
viewport,
|
|
&x, &y, &z );
|
|
bbox.advance_.dx_ = x - x0;
|
|
bbox.advance_.dy_ = y - y0;
|
|
|
|
return bbox;
|
|
}
|
|
|
|
#ifndef OGLFT_NO_QT
|
|
BBox Raster::measure ( const QChar c )
|
|
{
|
|
BBox bbox;
|
|
// For starters, just get the unscaled glyph bounding box
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c.unicode() );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return bbox;
|
|
|
|
FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
|
|
FT_LOAD_DEFAULT );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_Glyph glyph;
|
|
error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_BBox ft_bbox;
|
|
FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
bbox = ft_bbox;
|
|
bbox.advance_ = faces_[f].face_->glyph->advance;
|
|
|
|
// In order to be accurate regarding the placement of text not
|
|
// aligned at the glyph's origin (CENTER/MIDDLE), the bounding box
|
|
// of the raster format has to be projected back into the
|
|
// view's coordinates
|
|
|
|
GLint viewport[4];
|
|
GLdouble modelview[16], projection[16];
|
|
|
|
glGetIntegerv( GL_VIEWPORT, viewport );
|
|
glGetDoublev( GL_MODELVIEW_MATRIX, modelview );
|
|
glGetDoublev( GL_PROJECTION_MATRIX, projection );
|
|
|
|
// Well, first we have to get the Origin, since that is the basis
|
|
// of the bounding box
|
|
GLdouble x0, y0, z0;
|
|
gluUnProject( 0., 0., 0., modelview, projection, viewport, &x0, &y0, &z0 );
|
|
|
|
GLdouble x, y, z;
|
|
gluUnProject( bbox.x_min_, bbox.y_min_, 0., modelview, projection, viewport,
|
|
&x, &y, &z );
|
|
bbox.x_min_ = x - x0;
|
|
bbox.y_min_ = y - y0;
|
|
|
|
gluUnProject( bbox.x_max_, bbox.y_max_, 0., modelview, projection, viewport,
|
|
&x, &y, &z );
|
|
bbox.x_max_ = x - x0;
|
|
bbox.y_max_ = y - y0;
|
|
|
|
gluUnProject( bbox.advance_.dx_, bbox.advance_.dy_, 0., modelview, projection,
|
|
viewport,
|
|
&x, &y, &z );
|
|
bbox.advance_.dx_ = x - x0;
|
|
bbox.advance_.dy_ = y - y0;
|
|
|
|
return bbox;
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
|
|
GLuint Raster::compileGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
GLuint dlist = glGenLists( 1 );
|
|
glNewList( dlist, GL_COMPILE );
|
|
|
|
renderGlyph( face, glyph_index );
|
|
|
|
glEndList( );
|
|
|
|
return dlist;
|
|
}
|
|
|
|
void Raster::setCharSize ( void )
|
|
{
|
|
FT_Error error;
|
|
for ( unsigned int i = 0; i < faces_.size(); i++ ) {
|
|
error = FT_Set_Char_Size( faces_[i].face_,
|
|
(FT_F26Dot6)( point_size_ * 64 ),
|
|
(FT_F26Dot6)( point_size_ * 64 ),
|
|
resolution_,
|
|
resolution_ );
|
|
if ( error != 0 ) return;
|
|
}
|
|
|
|
if ( rotation_reference_glyph_ != 0 )
|
|
setRotationOffset();
|
|
}
|
|
|
|
void Raster::setRotationOffset ( void )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( rotation_reference_face_,
|
|
rotation_reference_glyph_,
|
|
FT_LOAD_RENDER );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
rotation_offset_y_ = rotation_reference_face_->glyph->bitmap.rows / 2.;
|
|
}
|
|
|
|
void Raster::clearCaches ( void )
|
|
{
|
|
GDLI fgi = glyph_dlists_.begin();
|
|
|
|
for ( ; fgi != glyph_dlists_.end(); ++fgi ) {
|
|
glDeleteLists( fgi->second, 1 );
|
|
}
|
|
|
|
glyph_dlists_.clear();
|
|
}
|
|
|
|
Monochrome::Monochrome ( const char* filename, float point_size,
|
|
FT_UInt resolution )
|
|
: Raster( filename, point_size, resolution )
|
|
{}
|
|
|
|
Monochrome::Monochrome ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Raster( face, point_size, resolution )
|
|
{}
|
|
|
|
Monochrome::~Monochrome ( void )
|
|
{}
|
|
|
|
GLubyte* Monochrome::invertBitmap ( const FT_Bitmap& bitmap )
|
|
{
|
|
// In FreeType 2.0.9, the pitch of bitmaps was rounded up to an
|
|
// even number. In general, this disagrees with what we had been
|
|
// using for OpenGL.
|
|
|
|
int width = bitmap.width / 8 + ( ( bitmap.width & 7 ) > 0 ? 1 : 0 );
|
|
|
|
GLubyte* inverse = new GLubyte[ bitmap.rows * width ];
|
|
GLubyte* inverse_ptr = inverse;
|
|
|
|
for ( int r = 0; r < bitmap.rows; r++ ) {
|
|
|
|
GLubyte* bitmap_ptr = &bitmap.buffer[bitmap.pitch * ( bitmap.rows - r - 1 )];
|
|
|
|
for ( int p = 0; p < width; p++ )
|
|
*inverse_ptr++ = *bitmap_ptr++;
|
|
}
|
|
|
|
return inverse;
|
|
}
|
|
|
|
void Monochrome::renderGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
// Start by retrieving the glyph's data.
|
|
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
FT_Glyph original_glyph;
|
|
FT_Glyph glyph;
|
|
|
|
error = FT_Get_Glyph( face->glyph, &original_glyph );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
error = FT_Glyph_Copy( original_glyph, &glyph );
|
|
|
|
FT_Done_Glyph( original_glyph );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
// If the individual characters are rotated (as distinct from string
|
|
// rotation), then apply that extra rotation here. This is equivalent
|
|
// to the sequence
|
|
// glTranslate(x_center,y_center);
|
|
// glRotate(angle);
|
|
// glTranslate(-x_center,-y_center);
|
|
// which is used for the polygonal styles. The deal with the raster
|
|
// styles is that you must retain the advance from the string rotation
|
|
// so that the glyphs are laid out properly. So, we make a copy of
|
|
// the string rotated glyph, and then rotate that and add back an
|
|
// additional offset to (in effect) restore the proper origin and
|
|
// advance of the glyph.
|
|
|
|
if ( character_rotation_z_ != 0. ) {
|
|
FT_Matrix rotation_matrix;
|
|
FT_Vector sinus;
|
|
|
|
FT_Vector_Unit( &sinus, (FT_Angle)(character_rotation_z_ * 0x10000L) );
|
|
|
|
rotation_matrix.xx = sinus.x;
|
|
rotation_matrix.xy = -sinus.y;
|
|
rotation_matrix.yx = sinus.y;
|
|
rotation_matrix.yy = sinus.x;
|
|
|
|
FT_Vector original_offset, rotation_offset;
|
|
|
|
original_offset.x = ( face->glyph->metrics.width / 2
|
|
+ face->glyph->metrics.horiBearingX ) / 64 * 0x10000L;
|
|
original_offset.y = (FT_Pos)(rotation_offset_y_ * 0x10000L);
|
|
|
|
rotation_offset = original_offset;
|
|
|
|
FT_Vector_Rotate( &rotation_offset,
|
|
(FT_Angle)(character_rotation_z_ * 0x10000L) );
|
|
|
|
rotation_offset.x = original_offset.x - rotation_offset.x;
|
|
rotation_offset.y = original_offset.y - rotation_offset.y;
|
|
|
|
rotation_offset.x /= 1024;
|
|
rotation_offset.y /= 1024;
|
|
|
|
error = FT_Glyph_Transform( glyph, &rotation_matrix, &rotation_offset );
|
|
}
|
|
|
|
error = FT_Glyph_To_Bitmap( &glyph, FT_RENDER_MODE_MONO, 0, 1 );
|
|
|
|
if ( error != 0 ) {
|
|
FT_Done_Glyph( glyph );
|
|
return;
|
|
}
|
|
|
|
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
|
|
|
|
// Evidently, in FreeType2, you can only get "upside-down" bitmaps and
|
|
// OpenGL won't invert a bitmap with PixelZoom, so we have to invert the
|
|
// glyph's bitmap ourselves.
|
|
|
|
GLubyte* inverted_bitmap = invertBitmap( bitmap_glyph->bitmap );
|
|
|
|
glBitmap( bitmap_glyph->bitmap.width, bitmap_glyph->bitmap.rows,
|
|
-bitmap_glyph->left,
|
|
bitmap_glyph->bitmap.rows - bitmap_glyph->top,
|
|
face->glyph->advance.x / 64.,
|
|
face->glyph->advance.y / 64.,
|
|
inverted_bitmap );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
delete[] inverted_bitmap;
|
|
}
|
|
|
|
Grayscale::Grayscale ( const char* filename, float point_size,
|
|
FT_UInt resolution )
|
|
: Raster( filename, point_size, resolution )
|
|
{}
|
|
|
|
Grayscale::Grayscale ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Raster( face, point_size, resolution )
|
|
{}
|
|
|
|
Grayscale::~Grayscale ( void )
|
|
{}
|
|
|
|
GLubyte* Grayscale::invertPixmap ( const FT_Bitmap& bitmap )
|
|
{
|
|
GLubyte* inverse = new GLubyte[ bitmap.rows * bitmap.pitch ];
|
|
GLubyte* inverse_ptr = inverse;
|
|
|
|
for ( int r = 0; r < bitmap.rows; r++ ) {
|
|
|
|
GLubyte* bitmap_ptr = &bitmap.buffer[bitmap.pitch * ( bitmap.rows - r - 1 )];
|
|
|
|
for ( int p = 0; p < bitmap.pitch; p++ ) {
|
|
*inverse_ptr++ = *bitmap_ptr++;
|
|
}
|
|
}
|
|
|
|
return inverse;
|
|
}
|
|
|
|
void Grayscale::renderGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
FT_Glyph original_glyph;
|
|
FT_Glyph glyph;
|
|
|
|
error = FT_Get_Glyph( face->glyph, &original_glyph );
|
|
|
|
if ( error != 0 ) return;
|
|
|
|
error = FT_Glyph_Copy( original_glyph, &glyph );
|
|
|
|
FT_Done_Glyph( original_glyph );
|
|
|
|
if ( error != 0 ) return;
|
|
|
|
if ( character_rotation_z_ != 0. ) {
|
|
FT_Matrix rotation_matrix;
|
|
FT_Vector sinus;
|
|
|
|
FT_Vector_Unit( &sinus, (FT_Angle)(character_rotation_z_ * 0x10000L) );
|
|
|
|
rotation_matrix.xx = sinus.x;
|
|
rotation_matrix.xy = -sinus.y;
|
|
rotation_matrix.yx = sinus.y;
|
|
rotation_matrix.yy = sinus.x;
|
|
|
|
FT_Vector original_offset, rotation_offset;
|
|
|
|
original_offset.x = ( face->glyph->metrics.width / 2
|
|
+ face->glyph->metrics.horiBearingX ) / 64 * 0x10000L;
|
|
original_offset.y = (FT_Pos)(rotation_offset_y_ * 0x10000L);
|
|
|
|
rotation_offset = original_offset;
|
|
|
|
FT_Vector_Rotate( &rotation_offset,
|
|
(FT_Angle)(character_rotation_z_ * 0x10000L) );
|
|
|
|
rotation_offset.x = original_offset.x - rotation_offset.x;
|
|
rotation_offset.y = original_offset.y - rotation_offset.y;
|
|
|
|
rotation_offset.x /= 1024;
|
|
rotation_offset.y /= 1024;
|
|
|
|
error = FT_Glyph_Transform( glyph, &rotation_matrix, &rotation_offset );
|
|
}
|
|
|
|
error = FT_Glyph_To_Bitmap( &glyph, FT_RENDER_MODE_NORMAL, 0, 1 );
|
|
|
|
if ( error != 0 ) {
|
|
FT_Done_Glyph( glyph );
|
|
return;
|
|
}
|
|
|
|
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
|
|
|
|
// Evidently, in FreeType2, you can only get "upside-down" bitmaps
|
|
// (this could be cured with PixelZoom, but that an additional function)
|
|
|
|
GLubyte* inverted_pixmap = invertPixmap( bitmap_glyph->bitmap );
|
|
|
|
// :-( If this is compiled in a display list, it may or not be in effect
|
|
// later when the list is actually called. So, the client should be alerted
|
|
// to this fact: unpack alignment must be 1
|
|
|
|
glPushAttrib( GL_PIXEL_MODE_BIT );
|
|
glPixelTransferf( GL_RED_SCALE, foreground_color_[R] - background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_SCALE, foreground_color_[G] - background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_SCALE, foreground_color_[B] - background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_SCALE, foreground_color_[A] );
|
|
glPixelTransferf( GL_RED_BIAS, background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_BIAS, background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_BIAS, background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_BIAS, background_color_[A] );
|
|
|
|
glBitmap( 0, 0, 0, 0,
|
|
bitmap_glyph->left,
|
|
bitmap_glyph->top - bitmap_glyph->bitmap.rows,
|
|
0 );
|
|
|
|
glDrawPixels( bitmap_glyph->bitmap.width, bitmap_glyph->bitmap.rows,
|
|
GL_LUMINANCE, GL_UNSIGNED_BYTE,
|
|
inverted_pixmap );
|
|
|
|
// This is how you advance the raster position when drawing PIXMAPS
|
|
// (without querying the state)
|
|
|
|
glBitmap( 0, 0, 0, 0,
|
|
-bitmap_glyph->left + face->glyph->advance.x / 64.,
|
|
bitmap_glyph->bitmap.rows - bitmap_glyph->top +
|
|
face->glyph->advance.y / 64.,
|
|
0 );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
glPopAttrib();
|
|
|
|
delete[] inverted_pixmap;
|
|
}
|
|
|
|
Translucent::Translucent ( const char* filename, float point_size,
|
|
FT_UInt resolution )
|
|
: Raster( filename, point_size, resolution )
|
|
{}
|
|
|
|
Translucent::Translucent ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Raster( face, point_size, resolution )
|
|
{}
|
|
|
|
Translucent::~Translucent ( void )
|
|
{}
|
|
|
|
// The simplest format which glDrawPixels can render with (varying) transparency
|
|
// is GL_LUMINANCE_ALPHA; so, we take the grayscale bitmap from FreeType
|
|
// and treat all non-zero values as full luminance (basically the mask for
|
|
// rendering) and duplicate the grayscale values as alpha values
|
|
// (as well as turn it upside-down).
|
|
|
|
GLubyte* Translucent::invertPixmapWithAlpha ( const FT_Bitmap& bitmap )
|
|
{
|
|
GLubyte* inverse = new GLubyte[ 2 * bitmap.rows * bitmap.pitch ];
|
|
GLubyte* inverse_ptr = inverse;
|
|
|
|
for ( int r = 0; r < bitmap.rows; r++ ) {
|
|
|
|
GLubyte* bitmap_ptr = &bitmap.buffer[bitmap.pitch * ( bitmap.rows - r - 1 )];
|
|
|
|
for ( int p = 0; p < bitmap.pitch; p++ ) {
|
|
*inverse_ptr++ = *bitmap_ptr ? 255 : 0;
|
|
*inverse_ptr++ = *bitmap_ptr++;
|
|
}
|
|
}
|
|
|
|
return inverse;
|
|
}
|
|
|
|
void Translucent::renderGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
FT_Glyph original_glyph;
|
|
FT_Glyph glyph;
|
|
|
|
error = FT_Get_Glyph( face->glyph, &original_glyph );
|
|
|
|
if ( error != 0 ) return;
|
|
|
|
error = FT_Glyph_Copy( original_glyph, &glyph );
|
|
|
|
FT_Done_Glyph( original_glyph );
|
|
|
|
if ( error != 0 ) return;
|
|
|
|
if ( character_rotation_z_ != 0. ) {
|
|
FT_Matrix rotation_matrix;
|
|
FT_Vector sinus;
|
|
|
|
FT_Vector_Unit( &sinus, (FT_Angle)(character_rotation_z_ * 0x10000L) );
|
|
|
|
rotation_matrix.xx = sinus.x;
|
|
rotation_matrix.xy = -sinus.y;
|
|
rotation_matrix.yx = sinus.y;
|
|
rotation_matrix.yy = sinus.x;
|
|
|
|
FT_Vector original_offset, rotation_offset;
|
|
|
|
original_offset.x = ( face->glyph->metrics.width / 2
|
|
+ face->glyph->metrics.horiBearingX ) / 64 * 0x10000L;
|
|
original_offset.y = (FT_Pos)(rotation_offset_y_ * 0x10000L);
|
|
|
|
rotation_offset = original_offset;
|
|
|
|
FT_Vector_Rotate( &rotation_offset,
|
|
(FT_Angle)(character_rotation_z_ * 0x10000L) );
|
|
|
|
rotation_offset.x = original_offset.x - rotation_offset.x;
|
|
rotation_offset.y = original_offset.y - rotation_offset.y;
|
|
|
|
rotation_offset.x /= 1024;
|
|
rotation_offset.y /= 1024;
|
|
|
|
error = FT_Glyph_Transform( glyph, &rotation_matrix, &rotation_offset );
|
|
}
|
|
|
|
error = FT_Glyph_To_Bitmap( &glyph, FT_RENDER_MODE_NORMAL, 0, 1 );
|
|
|
|
if ( error != 0 ) {
|
|
FT_Done_Glyph( glyph );
|
|
return;
|
|
}
|
|
|
|
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
|
|
|
|
// Evidently, in FreeType2, you can only get "upside-down" bitmaps. For
|
|
// translucency, the grayscale bitmap generated by FreeType is expanded
|
|
// to include an alpha value (and the non-zero values of the
|
|
// grayscale bitmap are saturated to provide a "mask" of the glyph).
|
|
|
|
GLubyte* inverted_pixmap = invertPixmapWithAlpha( bitmap_glyph->bitmap );
|
|
|
|
glPushAttrib( GL_PIXEL_MODE_BIT );
|
|
glPixelTransferf( GL_RED_SCALE, foreground_color_[R] - background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_SCALE, foreground_color_[G] -background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_SCALE, foreground_color_[B] - background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_SCALE, foreground_color_[A] );
|
|
glPixelTransferf( GL_RED_BIAS, background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_BIAS, background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_BIAS, background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_BIAS, background_color_[A] );
|
|
|
|
// Set the proper raster position for rendering this glyph (why doesn't
|
|
// OpenGL have a similar function for pixmaps?)
|
|
|
|
glBitmap( 0, 0, 0, 0,
|
|
bitmap_glyph->left,
|
|
bitmap_glyph->top - bitmap_glyph->bitmap.rows,
|
|
0 );
|
|
|
|
glDrawPixels( bitmap_glyph->bitmap.width, bitmap_glyph->bitmap.rows,
|
|
GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,
|
|
inverted_pixmap );
|
|
|
|
// This is how you advance the raster position when drawing PIXMAPS
|
|
// (without querying the state)
|
|
|
|
glBitmap( 0, 0, 0, 0,
|
|
-bitmap_glyph->left + face->glyph->advance.x / 64.,
|
|
bitmap_glyph->bitmap.rows - bitmap_glyph->top +
|
|
face->glyph->advance.y / 64.,
|
|
0 );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
glPopAttrib();
|
|
|
|
delete[] inverted_pixmap;
|
|
}
|
|
|
|
Polygonal::Polygonal ( const char* filename, float point_size, FT_UInt resolution )
|
|
: Face( filename, point_size, resolution )
|
|
{
|
|
if ( !isValid() ) return;
|
|
|
|
init();
|
|
}
|
|
|
|
Polygonal::Polygonal ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Face( face, point_size, resolution )
|
|
{
|
|
init();
|
|
}
|
|
|
|
void Polygonal::init ( void )
|
|
{
|
|
character_rotation_.active_ = false;
|
|
character_rotation_.x_ = 0;
|
|
character_rotation_.y_ = 0;
|
|
character_rotation_.z_ = 0;
|
|
|
|
tessellation_steps_ = DEFAULT_TESSELLATION_STEPS;
|
|
|
|
delta_ = 1. / (double)tessellation_steps_;
|
|
delta2_ = delta_ * delta_;
|
|
delta3_ = delta2_ * delta_;
|
|
|
|
// For vector rendition modes, FreeType is allowed to generate the
|
|
// lines and arcs at the original face definition resolution. To
|
|
// get to the proper glyph size, the vertices are scaled before
|
|
// they're passed to the GLU tessellation routines.
|
|
|
|
if ( resolution_ != 0 )
|
|
vector_scale_ = (GLdouble)( point_size_ * resolution_ ) /
|
|
(GLdouble)( faces_.front().face_->units_per_EM * 72 );
|
|
else // According to the FreeType documentation, resolution == 0 -> 72 DPI
|
|
vector_scale_ = (GLdouble)( point_size_ ) /
|
|
(GLdouble)( faces_.front().face_->units_per_EM );
|
|
|
|
color_tess_ = 0;
|
|
texture_tess_ = 0;
|
|
|
|
setCharSize();
|
|
|
|
// Can't call this until a valid character size is set!
|
|
|
|
setCharacterRotationReference( 'o' );
|
|
}
|
|
|
|
Polygonal::~Polygonal ( void )
|
|
{
|
|
clearCaches();
|
|
}
|
|
|
|
// Note: Changing the color tessellation object also clears the
|
|
// display list cache
|
|
|
|
void Polygonal::setColorTess ( ColorTess* color_tess )
|
|
{
|
|
color_tess_ = color_tess;
|
|
|
|
clearCaches();
|
|
}
|
|
|
|
// Note: Changing the texture coordinate tessellation object also
|
|
// clears the display list cache
|
|
|
|
void Polygonal::setTextureTess ( TextureTess* texture_tess )
|
|
{
|
|
texture_tess_ = texture_tess;
|
|
|
|
clearCaches();
|
|
}
|
|
|
|
// Note: Changing the appoximation steps also clears the display list cache
|
|
|
|
void Polygonal::setTessellationSteps ( unsigned int tessellation_steps )
|
|
{
|
|
if ( tessellation_steps != tessellation_steps_ ) {
|
|
|
|
tessellation_steps_ = tessellation_steps;
|
|
|
|
delta_ = 1. / (double)tessellation_steps_;
|
|
delta2_ = delta_ * delta_;
|
|
delta3_ = delta2_ * delta_;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
// Note: Changing the character rotation also clears the display list cache.
|
|
|
|
void Polygonal::setCharacterRotationX ( GLfloat character_rotation_x )
|
|
{
|
|
if ( character_rotation_x != character_rotation_.x_ ) {
|
|
character_rotation_.x_ = character_rotation_x;
|
|
|
|
if ( character_rotation_.x_ != 0. || character_rotation_.y_ != 0. ||
|
|
character_rotation_.z_ != 0. )
|
|
character_rotation_.active_ = true;
|
|
else
|
|
character_rotation_.active_ = false;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
void Polygonal::setCharacterRotationY ( GLfloat character_rotation_y )
|
|
{
|
|
if ( character_rotation_y != character_rotation_.y_ ) {
|
|
character_rotation_.y_ = character_rotation_y;
|
|
|
|
if ( character_rotation_.x_ != 0. || character_rotation_.y_ != 0. ||
|
|
character_rotation_.z_ != 0. )
|
|
character_rotation_.active_ = true;
|
|
else
|
|
character_rotation_.active_ = false;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
void Polygonal::setCharacterRotationZ ( GLfloat character_rotation_z )
|
|
{
|
|
if ( character_rotation_z != character_rotation_.z_ ) {
|
|
character_rotation_.z_ = character_rotation_z;
|
|
|
|
if ( character_rotation_.x_ != 0. || character_rotation_.y_ != 0. ||
|
|
character_rotation_.z_ != 0. )
|
|
character_rotation_.active_ = true;
|
|
else
|
|
character_rotation_.active_ = false;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
void Polygonal::setCharSize ( void )
|
|
{
|
|
for ( unsigned int i = 0; i < faces_.size(); i++ ) {
|
|
FT_Error error = FT_Set_Char_Size( faces_[i].face_,
|
|
0,
|
|
faces_[i].face_->units_per_EM * 64,
|
|
0,
|
|
0 );
|
|
if ( error != 0 ) return;
|
|
}
|
|
|
|
if ( rotation_reference_glyph_ != 0 )
|
|
setRotationOffset();
|
|
}
|
|
|
|
void Polygonal::setRotationOffset ( void )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( rotation_reference_face_,
|
|
rotation_reference_glyph_,
|
|
FT_LOAD_RENDER );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
vector_scale_ = ( point_size_ * resolution_ ) /
|
|
( 72. * rotation_reference_face_->units_per_EM );
|
|
|
|
rotation_offset_y_ =
|
|
( rotation_reference_face_->glyph->metrics.horiBearingY / 2. ) / 64.
|
|
* vector_scale_;
|
|
}
|
|
|
|
double Polygonal::height ( void ) const
|
|
{
|
|
if ( faces_[0].face_->height > 0 )
|
|
return ( faces_[0].face_->height * point_size_ * resolution_ ) /
|
|
( 72. * faces_[0].face_->units_per_EM );
|
|
else
|
|
return ( faces_[0].face_->size->metrics.y_ppem * point_size_ * resolution_ ) /
|
|
( 72. * faces_[0].face_->units_per_EM );
|
|
}
|
|
|
|
BBox Polygonal::measure ( unsigned char c )
|
|
{
|
|
BBox bbox;
|
|
// For starters, just get the unscaled glyph bounding box
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return bbox;
|
|
|
|
FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
|
|
FT_LOAD_DEFAULT );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_Glyph glyph;
|
|
error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_BBox ft_bbox;
|
|
FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
bbox = ft_bbox;
|
|
bbox.advance_ = faces_[f].face_->glyph->advance;
|
|
|
|
bbox *= ( point_size_ * resolution_ ) / ( 72. * faces_[f].face_->units_per_EM );
|
|
|
|
return bbox;
|
|
}
|
|
#ifndef OGLFT_NO_QT
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BBox Polygonal::measure ( const QChar c )
|
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{
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BBox bbox;
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// For starters, just get the unscaled glyph bounding box
|
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unsigned int f;
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FT_UInt glyph_index = 0;
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for ( f = 0; f < faces_.size(); f++ ) {
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glyph_index = FT_Get_Char_Index( faces_[f].face_, c.unicode() );
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if ( glyph_index != 0 ) break;
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}
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if ( glyph_index == 0 )
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return bbox;
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FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
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FT_LOAD_DEFAULT );
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if ( error != 0 )
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return bbox;
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FT_Glyph glyph;
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error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
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if ( error != 0 )
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return bbox;
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|
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FT_BBox ft_bbox;
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FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
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FT_Done_Glyph( glyph );
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bbox = ft_bbox;
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bbox.advance_ = faces_[f].face_->glyph->advance;
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bbox *= ( point_size_ * resolution_ ) / ( 72. * faces_[f].face_->units_per_EM );
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return bbox;
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}
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#endif /* OGLFT_NO_QT */
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GLuint Polygonal::compileGlyph ( FT_Face face, FT_UInt glyph_index )
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{
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GLuint dlist = glGenLists( 1 );
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glNewList( dlist, GL_COMPILE );
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renderGlyph( face, glyph_index );
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glEndList( );
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return dlist;
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}
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|
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void Polygonal::clearCaches ( void )
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{
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GDLI fgi = glyph_dlists_.begin();
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for ( ; fgi != glyph_dlists_.end(); ++fgi ) {
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glDeleteLists( fgi->second, 1 );
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}
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glyph_dlists_.clear();
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}
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Outline::Outline ( const char* filename, float point_size, FT_UInt resolution )
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: Polygonal( filename, point_size, resolution )
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{
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if ( !isValid() ) return;
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init();
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}
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Outline::Outline ( FT_Face face, float point_size, FT_UInt resolution )
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: Polygonal( face, point_size, resolution )
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{
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init();
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}
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void Outline::init ( void )
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{
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interface_.move_to = (FT_Outline_MoveTo_Func)moveToCallback;
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interface_.line_to = (FT_Outline_LineTo_Func)lineToCallback;
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interface_.conic_to = (FT_Outline_ConicTo_Func)conicToCallback;
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interface_.cubic_to = (FT_Outline_CubicTo_Func)cubicToCallback;
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interface_.shift = 0;
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interface_.delta = 0;
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}
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Outline::~Outline ( void )
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{}
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void Outline::renderGlyph ( FT_Face face, FT_UInt glyph_index )
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{
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FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
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if ( error != 0 )
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return;
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FT_OutlineGlyph g;
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error = FT_Get_Glyph( face->glyph, (FT_Glyph*)&g );
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if ( error != 0 )
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return;
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vector_scale_ = ( point_size_ * resolution_ ) / ( 72. * face->units_per_EM );
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if ( character_rotation_.active_ ) {
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glPushMatrix();
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glTranslatef( ( face->glyph->metrics.width / 2. +
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face->glyph->metrics.horiBearingX ) / 64.
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* vector_scale_,
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rotation_offset_y_,
|
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0. );
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if ( character_rotation_.x_ != 0. )
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glRotatef( character_rotation_.x_, 1., 0., 0. );
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if ( character_rotation_.y_ != 0. )
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glRotatef( character_rotation_.y_, 0., 1., 0. );
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if ( character_rotation_.z_ != 0. )
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glRotatef( character_rotation_.z_, 0., 0., 1. );
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|
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glTranslatef( -( face->glyph->metrics.width / 2. +
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face->glyph->metrics.horiBearingX ) / 64.
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* vector_scale_,
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-rotation_offset_y_,
|
|
0. );
|
|
}
|
|
|
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contour_open_ = false;
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|
|
|
// The Big Kahuna: the FreeType glyph decomposition routine traverses
|
|
// the outlines of the font by calling the various routines stored in
|
|
// outline_interface_. These routines in turn call the GL vertex routines.
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|
|
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error = FT_Outline_Decompose( &g->outline, &interface_, this );
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|
|
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FT_Done_Glyph( (FT_Glyph)g );
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|
|
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// Some glyphs may be empty (the 'blank' for instance!)
|
|
|
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if ( contour_open_ )
|
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glEnd( );
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|
|
|
|
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if ( character_rotation_.active_ ) {
|
|
glPopMatrix();
|
|
}
|
|
|
|
// Drawing a character always advances the MODELVIEW.
|
|
|
|
glTranslatef( face->glyph->advance.x / 64. * vector_scale_,
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face->glyph->advance.y / 64. * vector_scale_,
|
|
0. );
|
|
|
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for ( VILI vili = vertices_.begin(); vili != vertices_.end(); vili++ )
|
|
delete *vili;
|
|
|
|
vertices_.clear();
|
|
}
|
|
|
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int Outline::moveToCallback ( FT_Vector* to, Outline* outline )
|
|
{
|
|
if ( outline->contour_open_ ) {
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glEnd();
|
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}
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|
|
|
outline->last_vertex_ = VertexInfo( to,
|
|
outline->colorTess(),
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outline->textureTess() );
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|
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glBegin( GL_LINE_LOOP );
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outline->contour_open_ = true;
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|
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return 0;
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|
}
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|
|
|
int Outline::lineToCallback ( FT_Vector* to, Outline* outline )
|
|
{
|
|
outline->last_vertex_ = VertexInfo( to,
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|
outline->colorTess(),
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outline->textureTess() );
|
|
GLdouble g[2];
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g[X] = outline->last_vertex_.v_[X] * outline->vector_scale_;
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g[Y] = outline->last_vertex_.v_[Y] * outline->vector_scale_;
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|
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glVertex2dv( g );
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|
|
return 0;
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}
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|
|
|
int Outline::conicToCallback ( FT_Vector* control, FT_Vector* to, Outline* outline )
|
|
{
|
|
// This is crude: Step off conics with a fixed number of increments
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|
|
VertexInfo to_vertex( to, outline->colorTess(), outline->textureTess() );
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|
VertexInfo control_vertex( control, outline->colorTess(), outline->textureTess() );
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|
|
double b[2], c[2], d[2], f[2], df[2], d2f[2];
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|
GLdouble g[3];
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|
|
g[Z] = 0.;
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|
b[X] = outline->last_vertex_.v_[X] - 2 * control_vertex.v_[X] +
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to_vertex.v_[X];
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b[Y] = outline->last_vertex_.v_[Y] - 2 * control_vertex.v_[Y] +
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to_vertex.v_[Y];
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c[X] = -2 * outline->last_vertex_.v_[X] + 2 * control_vertex.v_[X];
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c[Y] = -2 * outline->last_vertex_.v_[Y] + 2 * control_vertex.v_[Y];
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d[X] = outline->last_vertex_.v_[X];
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d[Y] = outline->last_vertex_.v_[Y];
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f[X] = d[X];
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f[Y] = d[Y];
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df[X] = c[X] * outline->delta_ + b[X] * outline->delta2_;
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df[Y] = c[Y] * outline->delta_ + b[Y] * outline->delta2_;
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d2f[X] = 2 * b[X] * outline->delta2_;
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d2f[Y] = 2 * b[Y] * outline->delta2_;
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|
for ( unsigned int i = 0; i < outline->tessellation_steps_-1; i++ ) {
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|
f[X] += df[X];
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f[Y] += df[Y];
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g[X] = f[X] * outline->vector_scale_;
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g[Y] = f[Y] * outline->vector_scale_;
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if ( outline->colorTess() )
|
|
glColor4fv( outline->colorTess()->color( g ) );
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glVertex2dv( g );
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df[X] += d2f[X];
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df[Y] += d2f[Y];
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}
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g[X] = to_vertex.v_[X] * outline->vector_scale_;
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|
g[Y] = to_vertex.v_[Y] * outline->vector_scale_;
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if ( outline->colorTess() )
|
|
glColor4fv( outline->colorTess()->color( g ) );
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|
|
glVertex2dv( g );
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|
|
outline->last_vertex_ = to_vertex;
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|
|
return 0;
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|
}
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|
|
|
int Outline::cubicToCallback ( FT_Vector* control1, FT_Vector* control2,
|
|
FT_Vector* to, Outline* outline )
|
|
{
|
|
// This is crude: Step off cubics with a fixed number of increments
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|
|
|
VertexInfo to_vertex( to, outline->colorTess(), outline->textureTess() );
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|
VertexInfo control1_vertex( control1, outline->colorTess(), outline->textureTess() );
|
|
VertexInfo control2_vertex( control2, outline->colorTess(), outline->textureTess() );
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|
|
|
double a[2], b[2], c[2], d[2], f[2], df[2], d2f[2], d3f[2];
|
|
GLdouble g[3];
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|
|
|
g[Z] = 0.;
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|
|
|
a[X] = -outline->last_vertex_.v_[X] + 3 * control1_vertex.v_[X]
|
|
-3 * control2_vertex.v_[X] + to_vertex.v_[X];
|
|
a[Y] = -outline->last_vertex_.v_[Y] + 3 * control1_vertex.v_[Y]
|
|
-3 * control2_vertex.v_[Y] + to_vertex.v_[Y];
|
|
|
|
b[X] = 3 * outline->last_vertex_.v_[X] - 6 * control1_vertex.v_[X] +
|
|
3 * control2_vertex.v_[X];
|
|
b[Y] = 3 * outline->last_vertex_.v_[Y] - 6 * control1_vertex.v_[Y] +
|
|
3 * control2_vertex.v_[Y];
|
|
|
|
c[X] = -3 * outline->last_vertex_.v_[X] + 3 * control1_vertex.v_[X];
|
|
c[Y] = -3 * outline->last_vertex_.v_[Y] + 3 * control1_vertex.v_[Y];
|
|
|
|
d[X] = outline->last_vertex_.v_[X];
|
|
d[Y] = outline->last_vertex_.v_[Y];
|
|
|
|
f[X] = d[X];
|
|
f[Y] = d[Y];
|
|
df[X] = c[X] * outline->delta_ + b[X] * outline->delta2_
|
|
+ a[X] * outline->delta3_;
|
|
df[Y] = c[Y] * outline->delta_ + b[Y] * outline->delta2_
|
|
+ a[Y] * outline->delta3_;
|
|
d2f[X] = 2 * b[X] * outline->delta2_ + 6 * a[X] * outline->delta3_;
|
|
d2f[Y] = 2 * b[Y] * outline->delta2_ + 6 * a[Y] * outline->delta3_;
|
|
d3f[X] = 6 * a[X] * outline->delta3_;
|
|
d3f[Y] = 6 * a[Y] * outline->delta3_;
|
|
|
|
for ( unsigned int i = 0; i < outline->tessellation_steps_-1; i++ ) {
|
|
|
|
f[X] += df[X];
|
|
f[Y] += df[Y];
|
|
|
|
g[X] = f[X] * outline->vector_scale_;
|
|
g[Y] = f[Y] * outline->vector_scale_;
|
|
|
|
if ( outline->colorTess() )
|
|
glColor4fv( outline->colorTess()->color( g ) );
|
|
|
|
glVertex2dv( g );
|
|
|
|
df[X] += d2f[X];
|
|
df[Y] += d2f[Y];
|
|
d2f[X] += d3f[X];
|
|
d2f[Y] += d3f[Y];
|
|
}
|
|
|
|
g[X] = to_vertex.v_[X] * outline->vector_scale_;
|
|
g[Y] = to_vertex.v_[Y] * outline->vector_scale_;
|
|
|
|
if ( outline->colorTess() )
|
|
glColor4fv( outline->colorTess()->color( g ) );
|
|
|
|
glVertex2dv( g );
|
|
|
|
outline->last_vertex_ = to_vertex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
Filled::Filled ( const char* filename, float point_size, FT_UInt resolution )
|
|
: Polygonal( filename, point_size, resolution )
|
|
{
|
|
if ( !isValid() ) return;
|
|
|
|
init();
|
|
}
|
|
|
|
Filled::Filled ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Polygonal( face, point_size, resolution )
|
|
{
|
|
init();
|
|
}
|
|
|
|
void Filled::init ( void )
|
|
{
|
|
depth_offset_ = 0;
|
|
|
|
interface_.move_to = (FT_Outline_MoveTo_Func)moveToCallback;
|
|
interface_.line_to = (FT_Outline_LineTo_Func)lineToCallback;
|
|
interface_.conic_to = (FT_Outline_ConicTo_Func)conicToCallback;
|
|
interface_.cubic_to = (FT_Outline_CubicTo_Func)cubicToCallback;
|
|
interface_.shift = 0;
|
|
interface_.delta = 0;
|
|
|
|
tess_obj_ = gluNewTess();
|
|
|
|
gluTessCallback( tess_obj_, GLU_TESS_VERTEX, (GLUTessCallback)vertexCallback );
|
|
gluTessCallback( tess_obj_, GLU_TESS_BEGIN, (GLUTessCallback)beginCallback );
|
|
gluTessCallback( tess_obj_, GLU_TESS_END, (GLUTessCallback)endCallback );
|
|
gluTessCallback( tess_obj_, GLU_TESS_COMBINE_DATA, (GLUTessCallback)combineCallback );
|
|
gluTessCallback( tess_obj_, GLU_TESS_ERROR, (GLUTessCallback)errorCallback );
|
|
}
|
|
|
|
Filled::~Filled ( void )
|
|
{
|
|
gluDeleteTess( tess_obj_ );
|
|
}
|
|
|
|
void Filled::renderGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
FT_OutlineGlyph g;
|
|
|
|
error = FT_Get_Glyph( face->glyph, (FT_Glyph*)&g );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
vector_scale_ = ( point_size_ * resolution_ ) / ( 72. * face->units_per_EM );
|
|
|
|
if ( character_rotation_.active_ ) {
|
|
glPushMatrix();
|
|
glTranslatef( ( face->glyph->metrics.width / 2. +
|
|
face->glyph->metrics.horiBearingX ) / 64.
|
|
* vector_scale_,
|
|
rotation_offset_y_,
|
|
0. );
|
|
|
|
if ( character_rotation_.x_ != 0. )
|
|
glRotatef( character_rotation_.x_, 1., 0., 0. );
|
|
|
|
if ( character_rotation_.y_ != 0. )
|
|
glRotatef( character_rotation_.y_, 0., 1., 0. );
|
|
|
|
if ( character_rotation_.z_ != 0. )
|
|
glRotatef( character_rotation_.z_, 0., 0., 1. );
|
|
|
|
glTranslatef( -( face->glyph->metrics.width / 2. +
|
|
face->glyph->metrics.horiBearingX ) / 64.
|
|
* vector_scale_,
|
|
-rotation_offset_y_,
|
|
0. );
|
|
}
|
|
|
|
if ( depth_offset_ != 0. ) {
|
|
glPushMatrix();
|
|
glTranslatef( 0., 0., depth_offset_ );
|
|
glNormal3f( 0., 0., 1. );
|
|
}
|
|
else {
|
|
glNormal3f( 0., 0., -1. );
|
|
}
|
|
|
|
glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
|
|
|
|
contour_open_ = false;
|
|
|
|
gluTessBeginPolygon( tess_obj_, this );
|
|
|
|
// The Big Kahuna: the FreeType glyph decomposition routine traverses
|
|
// the outlines of the font by calling the various routines stored in
|
|
// interface_. These routines in turn call the GLU tessellation routines
|
|
// to create OGL polygons.
|
|
|
|
error = FT_Outline_Decompose( &g->outline, &interface_, this );
|
|
|
|
FT_Done_Glyph( (FT_Glyph)g );
|
|
|
|
// Some glyphs may be empty (the 'blank' for instance!)
|
|
|
|
if ( contour_open_ )
|
|
gluTessEndContour( tess_obj_ );
|
|
|
|
gluTessEndPolygon( tess_obj_ );
|
|
|
|
if ( depth_offset_ != 0. ) {
|
|
glPopMatrix();
|
|
}
|
|
if ( character_rotation_.active_ ) {
|
|
glPopMatrix();
|
|
}
|
|
|
|
// Drawing a character always advances the MODELVIEW.
|
|
|
|
glTranslatef( face->glyph->advance.x / 64 * vector_scale_,
|
|
face->glyph->advance.y / 64 * vector_scale_,
|
|
0. );
|
|
|
|
for ( VILI vili = extra_vertices_.begin(); vili != extra_vertices_.end(); vili++ )
|
|
delete *vili;
|
|
|
|
extra_vertices_.clear();
|
|
|
|
for ( VILI vili = vertices_.begin(); vili != vertices_.end(); vili++ )
|
|
delete *vili;
|
|
|
|
vertices_.clear();
|
|
}
|
|
|
|
int Filled::moveToCallback ( FT_Vector* to, Filled* filled )
|
|
{
|
|
if ( filled->contour_open_ ) {
|
|
gluTessEndContour( filled->tess_obj_ );
|
|
}
|
|
|
|
filled->last_vertex_ = VertexInfo( to, filled->colorTess(), filled->textureTess() );
|
|
|
|
gluTessBeginContour( filled->tess_obj_ );
|
|
|
|
filled->contour_open_ = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Filled::lineToCallback ( FT_Vector* to, Filled* filled )
|
|
{
|
|
filled->last_vertex_ = VertexInfo( to, filled->colorTess(), filled->textureTess() );
|
|
|
|
VertexInfo* vertex = new VertexInfo( to, filled->colorTess(), filled->textureTess() );
|
|
|
|
vertex->v_[X] *= filled->vector_scale_;
|
|
vertex->v_[Y] *= filled->vector_scale_;
|
|
|
|
gluTessVertex( filled->tess_obj_, vertex->v_, vertex );
|
|
|
|
filled->vertices_.push_back( vertex );
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Filled::conicToCallback ( FT_Vector* control, FT_Vector* to, Filled* filled )
|
|
{
|
|
// This is crude: Step off conics with a fixed number of increments
|
|
|
|
VertexInfo to_vertex( to, filled->colorTess(), filled->textureTess() );
|
|
VertexInfo control_vertex( control, filled->colorTess(), filled->textureTess() );
|
|
|
|
double b[2], c[2], d[2], f[2], df[2], d2f[2];
|
|
|
|
b[X] = filled->last_vertex_.v_[X] - 2 * control_vertex.v_[X] +
|
|
to_vertex.v_[X];
|
|
b[Y] = filled->last_vertex_.v_[Y] - 2 * control_vertex.v_[Y] +
|
|
to_vertex.v_[Y];
|
|
|
|
c[X] = -2 * filled->last_vertex_.v_[X] + 2 * control_vertex.v_[X];
|
|
c[Y] = -2 * filled->last_vertex_.v_[Y] + 2 * control_vertex.v_[Y];
|
|
|
|
d[X] = filled->last_vertex_.v_[X];
|
|
d[Y] = filled->last_vertex_.v_[Y];
|
|
|
|
f[X] = d[X];
|
|
f[Y] = d[Y];
|
|
df[X] = c[X] * filled->delta_ + b[X] * filled->delta2_;
|
|
df[Y] = c[Y] * filled->delta_ + b[Y] * filled->delta2_;
|
|
d2f[X] = 2 * b[X] * filled->delta2_;
|
|
d2f[Y] = 2 * b[Y] * filled->delta2_;
|
|
|
|
for ( unsigned int i = 0; i < filled->tessellation_steps_-1; i++ ) {
|
|
|
|
f[X] += df[X];
|
|
f[Y] += df[Y];
|
|
|
|
VertexInfo* vertex = new VertexInfo( f, filled->colorTess(), filled->textureTess() );
|
|
|
|
vertex->v_[X] *= filled->vector_scale_;
|
|
vertex->v_[Y] *= filled->vector_scale_;
|
|
|
|
filled->vertices_.push_back( vertex );
|
|
|
|
gluTessVertex( filled->tess_obj_, vertex->v_, vertex );
|
|
|
|
df[X] += d2f[X];
|
|
df[Y] += d2f[Y];
|
|
}
|
|
|
|
VertexInfo* vertex = new VertexInfo( to, filled->colorTess(), filled->textureTess() );
|
|
|
|
vertex->v_[X] *= filled->vector_scale_;
|
|
vertex->v_[Y] *= filled->vector_scale_;
|
|
|
|
filled->vertices_.push_back( vertex );
|
|
|
|
gluTessVertex( filled->tess_obj_, vertex->v_, vertex );
|
|
|
|
filled->last_vertex_ = to_vertex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Filled::cubicToCallback ( FT_Vector* control1, FT_Vector* control2,
|
|
FT_Vector* to, Filled* filled )
|
|
{
|
|
// This is crude: Step off cubics with a fixed number of increments
|
|
|
|
VertexInfo to_vertex( to, filled->colorTess(), filled->textureTess() );
|
|
VertexInfo control1_vertex( control1, filled->colorTess(), filled->textureTess() );
|
|
VertexInfo control2_vertex( control2, filled->colorTess(), filled->textureTess() );
|
|
|
|
double a[2], b[2], c[2], d[2], f[2], df[2], d2f[2], d3f[2];
|
|
|
|
a[X] = -filled->last_vertex_.v_[X] + 3 * control1_vertex.v_[X]
|
|
-3 * control2_vertex.v_[X] + to_vertex.v_[X];
|
|
a[Y] = -filled->last_vertex_.v_[Y] + 3 * control1_vertex.v_[Y]
|
|
-3 * control2_vertex.v_[Y] + to_vertex.v_[Y];
|
|
|
|
b[X] = 3 * filled->last_vertex_.v_[X] - 6 * control1_vertex.v_[X] +
|
|
3 * control2_vertex.v_[X];
|
|
b[Y] = 3 * filled->last_vertex_.v_[Y] - 6 * control1_vertex.v_[Y] +
|
|
3 * control2_vertex.v_[Y];
|
|
|
|
c[X] = -3 * filled->last_vertex_.v_[X] + 3 * control1_vertex.v_[X];
|
|
c[Y] = -3 * filled->last_vertex_.v_[Y] + 3 * control1_vertex.v_[Y];
|
|
|
|
d[X] = filled->last_vertex_.v_[X];
|
|
d[Y] = filled->last_vertex_.v_[Y];
|
|
|
|
f[X] = d[X];
|
|
f[Y] = d[Y];
|
|
df[X] = c[X] * filled->delta_ + b[X] * filled->delta2_
|
|
+ a[X] * filled->delta3_;
|
|
df[Y] = c[Y] * filled->delta_ + b[Y] * filled->delta2_
|
|
+ a[Y] * filled->delta3_;
|
|
d2f[X] = 2 * b[X] * filled->delta2_ + 6 * a[X] * filled->delta3_;
|
|
d2f[Y] = 2 * b[Y] * filled->delta2_ + 6 * a[Y] * filled->delta3_;
|
|
d3f[X] = 6 * a[X] * filled->delta3_;
|
|
d3f[Y] = 6 * a[Y] * filled->delta3_;
|
|
|
|
for ( unsigned int i = 0; i < filled->tessellation_steps_-1; i++ ) {
|
|
|
|
f[X] += df[X];
|
|
f[Y] += df[Y];
|
|
|
|
VertexInfo* vertex = new VertexInfo( f, filled->colorTess(), filled->textureTess() );
|
|
|
|
vertex->v_[X] *= filled->vector_scale_;
|
|
vertex->v_[Y] *= filled->vector_scale_;
|
|
|
|
filled->vertices_.push_back( vertex );
|
|
|
|
gluTessVertex( filled->tess_obj_, vertex->v_, vertex );
|
|
|
|
df[X] += d2f[X];
|
|
df[Y] += d2f[Y];
|
|
d2f[X] += d3f[X];
|
|
d2f[Y] += d3f[Y];
|
|
}
|
|
|
|
VertexInfo* vertex = new VertexInfo( to, filled->colorTess(), filled->textureTess() );
|
|
|
|
vertex->v_[X] *= filled->vector_scale_;
|
|
vertex->v_[Y] *= filled->vector_scale_;
|
|
|
|
filled->vertices_.push_back( vertex );
|
|
|
|
gluTessVertex( filled->tess_obj_, vertex->v_, vertex );
|
|
|
|
filled->last_vertex_ = to_vertex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void Filled::vertexCallback ( VertexInfo* vertex )
|
|
{
|
|
if ( vertex->color_tess_ != 0 )
|
|
glColor4fv( vertex->color_tess_->color( vertex->v_ ) );
|
|
|
|
if ( vertex->texture_tess_ != 0 )
|
|
glTexCoord2fv( vertex->texture_tess_->texCoord( vertex->v_ ) );
|
|
|
|
glVertex3dv( vertex->v_ );
|
|
}
|
|
|
|
void Filled::beginCallback ( GLenum which )
|
|
{
|
|
glBegin( which );
|
|
}
|
|
|
|
void Filled::endCallback ( void )
|
|
{
|
|
glEnd();
|
|
}
|
|
|
|
void Filled::combineCallback ( GLdouble coords[3], void* vertex_data[4],
|
|
GLfloat weight[4], void** out_data,
|
|
Filled* filled )
|
|
{
|
|
(void)vertex_data;
|
|
(void)weight;
|
|
// std::cerr << "called combine" << std::endl;
|
|
VertexInfo* vertex = new VertexInfo( coords );
|
|
*out_data = vertex;
|
|
filled->extraVertices().push_back( vertex );
|
|
}
|
|
|
|
void Filled::errorCallback ( GLenum error_code )
|
|
{
|
|
std::cerr << "hmm. error during tessellation?:" << gluErrorString( error_code ) << std::endl;
|
|
}
|
|
|
|
#ifndef OGLFT_NO_SOLID
|
|
Solid::Solid ( const char* filename, float point_size, FT_UInt resolution )
|
|
: Filled( filename, point_size, resolution )
|
|
{
|
|
if ( !isValid() ) return;
|
|
|
|
init();
|
|
}
|
|
|
|
Solid::Solid ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Filled( face, point_size, resolution )
|
|
{
|
|
init();
|
|
}
|
|
|
|
void Solid::init ( void )
|
|
{
|
|
interface_.move_to = (FT_Outline_MoveTo_Func)moveToCallback;
|
|
interface_.line_to = (FT_Outline_LineTo_Func)lineToCallback;
|
|
interface_.conic_to = (FT_Outline_ConicTo_Func)conicToCallback;
|
|
interface_.cubic_to = (FT_Outline_CubicTo_Func)cubicToCallback;
|
|
interface_.shift = 0;
|
|
interface_.delta = 0;
|
|
|
|
// Set up for extrusion. Default depth is 1 (units of what?)
|
|
extrusion_.depth_ = 1.;
|
|
extrusion_.up_[X] = 0.;
|
|
extrusion_.up_[Y] = 1.;
|
|
extrusion_.up_[Z] = 0.;
|
|
extrusion_.n_polyline_pts_ = N_POLYLINE_PTS;
|
|
|
|
assign( extrusion_.point_array_[0], 0., 0., extrusion_.depth_ + 1. );
|
|
assign( extrusion_.point_array_[1], 0., 0., extrusion_.depth_ );
|
|
assign( extrusion_.point_array_[2], 0., 0., 0. );
|
|
assign( extrusion_.point_array_[3], 0., 0., -1. );
|
|
|
|
// Turn on closed contours and smooth vertices; turn off end capping
|
|
|
|
gleSetJoinStyle( TUBE_JN_RAW | TUBE_CONTOUR_CLOSED | TUBE_NORM_EDGE );
|
|
}
|
|
|
|
Solid::~Solid ( void )
|
|
{}
|
|
|
|
// Note: as usual, setting this clears the caches
|
|
|
|
void Solid::setDepth ( double depth )
|
|
{
|
|
if ( depth > 0. && depth != extrusion_.depth_ ) {
|
|
extrusion_.depth_ = depth;
|
|
|
|
assign( extrusion_.point_array_[0], 0., 0., extrusion_.depth_ + 1. );
|
|
assign( extrusion_.point_array_[1], 0., 0., extrusion_.depth_ );
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
void Solid::renderGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
FT_OutlineGlyph g;
|
|
|
|
error = FT_Get_Glyph( face->glyph, (FT_Glyph*)&g );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
vector_scale_ = ( point_size_ * resolution_ ) / ( 72. * face->units_per_EM );
|
|
|
|
if ( character_rotation_.active_ ) {
|
|
glPushMatrix();
|
|
|
|
glTranslatef( ( face->glyph->metrics.width / 2. +
|
|
face->glyph->metrics.horiBearingX ) / 64.
|
|
* vector_scale_,
|
|
rotation_offset_y_,
|
|
0. );
|
|
|
|
if ( character_rotation_.x_ != 0. )
|
|
glRotatef( character_rotation_.x_, 1., 0., 0. );
|
|
|
|
if ( character_rotation_.y_ != 0. )
|
|
glRotatef( character_rotation_.y_, 0., 1., 0. );
|
|
|
|
if ( character_rotation_.z_ != 0. )
|
|
glRotatef( character_rotation_.z_, 0., 0., 1. );
|
|
|
|
glTranslatef( -( face->glyph->metrics.width / 2. +
|
|
face->glyph->metrics.horiBearingX ) / 64.
|
|
* vector_scale_,
|
|
-rotation_offset_y_,
|
|
0. );
|
|
}
|
|
|
|
contour_open_ = false;
|
|
|
|
// In theory, TrueType contours are defined clockwise and Type1 contours
|
|
// are defined counter-clockwise. Trust the flag set by FreeType to
|
|
// indicate this since it is critical to getting the orientation of the
|
|
// surface normals correct.
|
|
if ( g->outline.flags & FT_OUTLINE_REVERSE_FILL ) {
|
|
extrusion_.normal_sign_.x_ = -1;
|
|
extrusion_.normal_sign_.y_ = 1;
|
|
}
|
|
else {
|
|
extrusion_.normal_sign_.x_ = 1;
|
|
extrusion_.normal_sign_.y_ = -1;
|
|
}
|
|
// The Big Kahuna: the FreeType glyph decomposition routine traverses
|
|
// the outlines of the font by calling the various routines stored in
|
|
// extrude_interface_. These in turn call the gleExtrusion routine.
|
|
|
|
error = FT_Outline_Decompose( &g->outline, &interface_, this );
|
|
|
|
FT_Done_Glyph( (FT_Glyph)g );
|
|
|
|
// Some glyphs may be empty (the 'blank' for instance!)
|
|
|
|
if ( contour_open_ ) {
|
|
extrusion_.contour_normals_.push_back( extrusion_.contour_normals_.front() );
|
|
|
|
gleExtrusion( extrusion_.contour_.size(),
|
|
&extrusion_.contour_.begin()->p_,
|
|
&extrusion_.contour_normals_[1].p_,
|
|
extrusion_.up_,
|
|
extrusion_.n_polyline_pts_,
|
|
extrusion_.point_array_,
|
|
0 );
|
|
|
|
extrusion_.contour_.clear();
|
|
extrusion_.contour_normals_.clear();
|
|
}
|
|
|
|
if ( character_rotation_.active_ ) {
|
|
glPopMatrix();
|
|
}
|
|
|
|
// Apply the front and back faces of the solid character (recall that
|
|
// drawing a character advances the MODELVIEW, so defend against that
|
|
// with the stack operations)
|
|
|
|
glPushMatrix();
|
|
depth_offset_ = 0.;
|
|
Filled::renderGlyph( face, glyph_index );
|
|
glPopMatrix();
|
|
|
|
glPushMatrix();
|
|
depth_offset_ = extrusion_.depth_;
|
|
Filled::renderGlyph( face, glyph_index );
|
|
glPopMatrix();
|
|
|
|
// Drawing a character always advances the MODELVIEW.
|
|
|
|
glTranslatef( face->glyph->advance.x / 64. * vector_scale_,
|
|
face->glyph->advance.y / 64. * vector_scale_,
|
|
0. );
|
|
|
|
for ( VILI vili = vertices_.begin(); vili != vertices_.end(); vili++ )
|
|
delete *vili;
|
|
|
|
vertices_.clear();
|
|
}
|
|
|
|
int Solid::moveToCallback ( FT_Vector* to, Solid* solid )
|
|
{
|
|
if ( solid->contour_open_ ) {
|
|
|
|
// A word of explanation: since you can't predict when the
|
|
// contour is going to end (its end is signaled by calling this
|
|
// routine, i.e., the contour ends when another is started
|
|
// abruptly), only the lineTo and arcTo functions generate contour
|
|
// points. The upshot is that the normals, which are computed for the
|
|
// current segment, are one behind the segment described in the
|
|
// the contour array. To make things match up at the end, the first
|
|
// normal is copied to the end of the normal array and the extrusion
|
|
// routine is passed the list of normals starting at the second entry.
|
|
|
|
solid->extrusion_.contour_normals_.
|
|
push_back( solid->extrusion_.contour_normals_.front() );
|
|
#if 1
|
|
gleExtrusion( solid->extrusion_.contour_.size(),
|
|
&solid->extrusion_.contour_.begin()->p_,
|
|
&solid->extrusion_.contour_normals_[1].p_,
|
|
solid->extrusion_.up_,
|
|
solid->extrusion_.n_polyline_pts_,
|
|
solid->extrusion_.point_array_,
|
|
0 );
|
|
#endif
|
|
solid->extrusion_.contour_.clear();
|
|
solid->extrusion_.contour_normals_.clear();
|
|
}
|
|
|
|
solid->last_vertex_ = VertexInfo( to, solid->colorTess(), solid->textureTess() );
|
|
|
|
solid->contour_open_ = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Solid::lineToCallback ( FT_Vector* to, Solid* solid )
|
|
{
|
|
VertexInfo vertex( to, solid->colorTess(), solid->textureTess() );
|
|
|
|
VertexInfo normal( solid->extrusion_.normal_sign_.y_ *
|
|
( vertex.v_[Y] - solid->last_vertex_.v_[Y] ),
|
|
solid->extrusion_.normal_sign_.x_ *
|
|
( vertex.v_[X] - solid->last_vertex_.v_[X] ) );
|
|
|
|
solid->last_vertex_ = vertex;
|
|
|
|
vertex.v_[X] *= solid->vector_scale_;
|
|
vertex.v_[Y] *= solid->vector_scale_;
|
|
|
|
normal.normalize();
|
|
|
|
solid->extrusion_.contour_.push_back( vertex );
|
|
solid->extrusion_.contour_normals_.push_back( normal );
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Solid::conicToCallback ( FT_Vector* control, FT_Vector* to, Solid* solid )
|
|
{
|
|
// This is crude: Step off conics with a fixed number of increments
|
|
|
|
VertexInfo to_vertex( to, solid->colorTess(), solid->textureTess() );
|
|
VertexInfo control_vertex( control, solid->colorTess(), solid->textureTess() );
|
|
|
|
double b[2], c[2], d[2], f[2], df[2], d2f[2];
|
|
|
|
b[X] = solid->last_vertex_.v_[X] - 2 * control_vertex.v_[X] +
|
|
to_vertex.v_[X];
|
|
b[Y] = solid->last_vertex_.v_[Y] - 2 * control_vertex.v_[Y] +
|
|
to_vertex.v_[Y];
|
|
|
|
c[X] = -2 * solid->last_vertex_.v_[X] + 2 * control_vertex.v_[X];
|
|
c[Y] = -2 * solid->last_vertex_.v_[Y] + 2 * control_vertex.v_[Y];
|
|
|
|
d[X] = solid->last_vertex_.v_[X];
|
|
d[Y] = solid->last_vertex_.v_[Y];
|
|
|
|
f[X] = d[X];
|
|
f[Y] = d[Y];
|
|
df[X] = c[X] * solid->delta_ + b[X] * solid->delta2_;
|
|
df[Y] = c[Y] * solid->delta_ + b[Y] * solid->delta2_;
|
|
d2f[X] = 2 * b[X] * solid->delta2_;
|
|
d2f[Y] = 2 * b[Y] * solid->delta2_;
|
|
|
|
for ( unsigned int i = 0; i < solid->tessellation_steps_-1; i++ ) {
|
|
|
|
f[X] += df[X];
|
|
f[Y] += df[Y];
|
|
|
|
VertexInfo vertex( f, solid->colorTess(), solid->textureTess() );
|
|
|
|
VertexInfo normal( solid->extrusion_.normal_sign_.y_ * df[Y],
|
|
solid->extrusion_.normal_sign_.x_ * df[X] );
|
|
|
|
vertex.v_[X] *= solid->vector_scale_;
|
|
vertex.v_[Y] *= solid->vector_scale_;
|
|
|
|
normal.normalize();
|
|
|
|
solid->extrusion_.contour_.push_back( vertex );
|
|
solid->extrusion_.contour_normals_.push_back( normal );
|
|
|
|
df[X] += d2f[X];
|
|
df[Y] += d2f[Y];
|
|
}
|
|
|
|
VertexInfo vertex( to, solid->colorTess(), solid->textureTess() );
|
|
|
|
VertexInfo normal( solid->extrusion_.normal_sign_.y_ * df[Y],
|
|
solid->extrusion_.normal_sign_.x_ * df[X] );
|
|
|
|
vertex.v_[X] *= solid->vector_scale_;
|
|
vertex.v_[Y] *= solid->vector_scale_;
|
|
|
|
normal.normalize();
|
|
|
|
solid->extrusion_.contour_.push_back( vertex );
|
|
solid->extrusion_.contour_normals_.push_back( normal );
|
|
|
|
solid->last_vertex_ = to_vertex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Solid::cubicToCallback ( FT_Vector* control1, FT_Vector* control2,
|
|
FT_Vector* to, Solid* solid )
|
|
{
|
|
// This is crude: Step off cubics with a fixed number of increments
|
|
|
|
VertexInfo to_vertex( to, solid->colorTess(), solid->textureTess() );
|
|
VertexInfo control1_vertex( control1, solid->colorTess(), solid->textureTess() );
|
|
VertexInfo control2_vertex( control2, solid->colorTess(), solid->textureTess() );
|
|
|
|
double a[2], b[2], c[2], d[2], f[2], df[2], d2f[2], d3f[2];
|
|
|
|
a[X] = -solid->last_vertex_.v_[X] + 3 * control1_vertex.v_[X]
|
|
-3 * control2_vertex.v_[X] + to_vertex.v_[X];
|
|
a[Y] = -solid->last_vertex_.v_[Y] + 3 * control1_vertex.v_[Y]
|
|
-3 * control2_vertex.v_[Y] + to_vertex.v_[Y];
|
|
|
|
b[X] = 3 * solid->last_vertex_.v_[X] - 6 * control1_vertex.v_[X] +
|
|
3 * control2_vertex.v_[X];
|
|
b[Y] = 3 * solid->last_vertex_.v_[Y] - 6 * control1_vertex.v_[Y] +
|
|
3 * control2_vertex.v_[Y];
|
|
|
|
c[X] = -3 * solid->last_vertex_.v_[X] + 3 * control1_vertex.v_[X];
|
|
c[Y] = -3 * solid->last_vertex_.v_[Y] + 3 * control1_vertex.v_[Y];
|
|
|
|
d[X] = solid->last_vertex_.v_[X];
|
|
d[Y] = solid->last_vertex_.v_[Y];
|
|
|
|
f[X] = d[X];
|
|
f[Y] = d[Y];
|
|
df[X] = c[X] * solid->delta_ + b[X] * solid->delta2_
|
|
+ a[X] * solid->delta3_;
|
|
df[Y] = c[Y] * solid->delta_ + b[Y] * solid->delta2_
|
|
+ a[Y] * solid->delta3_;
|
|
d2f[X] = 2 * b[X] * solid->delta2_ + 6 * a[X] * solid->delta3_;
|
|
d2f[Y] = 2 * b[Y] * solid->delta2_ + 6 * a[Y] * solid->delta3_;
|
|
d3f[X] = 6 * a[X] * solid->delta3_;
|
|
d3f[Y] = 6 * a[Y] * solid->delta3_;
|
|
|
|
for ( unsigned int i = 0; i < solid->tessellation_steps_-1; i++ ) {
|
|
|
|
f[X] += df[X];
|
|
f[Y] += df[Y];
|
|
|
|
VertexInfo vertex( f, solid->colorTess(), solid->textureTess() );
|
|
|
|
VertexInfo normal( solid->extrusion_.normal_sign_.y_ * df[Y],
|
|
solid->extrusion_.normal_sign_.x_ * df[X] );
|
|
|
|
vertex.v_[X] *= solid->vector_scale_;
|
|
vertex.v_[Y] *= solid->vector_scale_;
|
|
|
|
normal.normalize();
|
|
|
|
solid->extrusion_.contour_.push_back( vertex );
|
|
solid->extrusion_.contour_normals_.push_back( normal );
|
|
|
|
df[X] += d2f[X];
|
|
df[Y] += d2f[Y];
|
|
d2f[X] += d3f[X];
|
|
d2f[Y] += d3f[Y];
|
|
}
|
|
|
|
VertexInfo vertex( to, solid->colorTess(), solid->textureTess() );
|
|
|
|
VertexInfo normal( solid->extrusion_.normal_sign_.y_ * df[Y],
|
|
solid->extrusion_.normal_sign_.x_ * df[X] );
|
|
|
|
vertex.v_[X] *= solid->vector_scale_;
|
|
vertex.v_[Y] *= solid->vector_scale_;
|
|
|
|
normal.normalize();
|
|
|
|
solid->extrusion_.contour_.push_back( vertex );
|
|
solid->extrusion_.contour_normals_.push_back( normal );
|
|
|
|
solid->last_vertex_ = to_vertex;
|
|
|
|
return 0;
|
|
}
|
|
#endif // OGLFT_NO_SOLID
|
|
|
|
Texture::Texture ( const char* filename, float point_size, FT_UInt resolution )
|
|
: Face( filename, point_size, resolution )
|
|
{
|
|
if ( !isValid() ) return;
|
|
|
|
init();
|
|
}
|
|
|
|
Texture::Texture ( FT_Face face, float point_size, FT_UInt resolution )
|
|
: Face( face, point_size, resolution )
|
|
{
|
|
init();
|
|
}
|
|
|
|
void Texture::init ( void )
|
|
{
|
|
character_rotation_.active_ = false;
|
|
character_rotation_.x_ = 0;
|
|
character_rotation_.y_ = 0;
|
|
character_rotation_.z_ = 0;
|
|
|
|
setCharSize();
|
|
|
|
setCharacterRotationReference( 'o' );
|
|
}
|
|
|
|
Texture::~Texture ( void )
|
|
{
|
|
clearCaches();
|
|
}
|
|
|
|
// Note: Changing the character rotation also clears the display list cache.
|
|
|
|
void Texture::setCharacterRotationX ( GLfloat character_rotation_x )
|
|
{
|
|
if ( character_rotation_x != character_rotation_.x_ ) {
|
|
character_rotation_.x_ = character_rotation_x;
|
|
|
|
if ( character_rotation_.x_ != 0. || character_rotation_.y_ != 0. ||
|
|
character_rotation_.z_ != 0. )
|
|
character_rotation_.active_ = true;
|
|
else
|
|
character_rotation_.active_ = false;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
void Texture::setCharacterRotationY ( GLfloat character_rotation_y )
|
|
{
|
|
if ( character_rotation_y != character_rotation_.y_ ) {
|
|
character_rotation_.y_ = character_rotation_y;
|
|
|
|
if ( character_rotation_.x_ != 0. || character_rotation_.y_ != 0. ||
|
|
character_rotation_.z_ != 0. )
|
|
character_rotation_.active_ = true;
|
|
else
|
|
character_rotation_.active_ = false;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
void Texture::setCharacterRotationZ ( GLfloat character_rotation_z )
|
|
{
|
|
if ( character_rotation_z != character_rotation_.z_ ) {
|
|
character_rotation_.z_ = character_rotation_z;
|
|
|
|
if ( character_rotation_.x_ != 0. || character_rotation_.y_ != 0. ||
|
|
character_rotation_.z_ != 0. )
|
|
character_rotation_.active_ = true;
|
|
else
|
|
character_rotation_.active_ = false;
|
|
|
|
clearCaches();
|
|
}
|
|
}
|
|
|
|
void Texture::setCharSize ( void )
|
|
{
|
|
for ( unsigned int f = 0; f < faces_.size(); f++ ) {
|
|
FT_Error error = FT_Set_Char_Size( faces_[f].face_,
|
|
(FT_F26Dot6)( point_size_ * 64 ),
|
|
(FT_F26Dot6)( point_size_ * 64 ),
|
|
resolution_,
|
|
resolution_ );
|
|
if ( error != 0 )
|
|
return;
|
|
}
|
|
|
|
if ( rotation_reference_glyph_ != 0 )
|
|
setRotationOffset();
|
|
}
|
|
|
|
void Texture::setRotationOffset ( void )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( rotation_reference_face_,
|
|
rotation_reference_glyph_,
|
|
FT_LOAD_RENDER );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
rotation_offset_y_ = rotation_reference_face_->glyph->bitmap.rows / 2.;
|
|
}
|
|
|
|
BBox Texture::measure ( unsigned char c )
|
|
{
|
|
BBox bbox;
|
|
// For starters, just get the unscaled glyph bounding box
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return bbox;
|
|
|
|
FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
|
|
FT_LOAD_DEFAULT );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_Glyph glyph;
|
|
error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_BBox ft_bbox;
|
|
FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
bbox = ft_bbox;
|
|
bbox.advance_ = faces_[f].face_->glyph->advance;
|
|
|
|
return bbox;
|
|
}
|
|
|
|
double Texture::height ( void ) const
|
|
{
|
|
if ( faces_[0].face_->height > 0 )
|
|
return faces_[0].face_->height / 64.;
|
|
else
|
|
return faces_[0].face_->size->metrics.y_ppem;
|
|
}
|
|
|
|
#ifndef OGLFT_NO_QT
|
|
|
|
BBox Texture::measure ( const QChar c )
|
|
{
|
|
BBox bbox;
|
|
// For starters, just get the unscaled glyph bounding box
|
|
unsigned int f;
|
|
FT_UInt glyph_index = 0;
|
|
|
|
for ( f = 0; f < faces_.size(); f++ ) {
|
|
glyph_index = FT_Get_Char_Index( faces_[f].face_, c.unicode() );
|
|
if ( glyph_index != 0 ) break;
|
|
}
|
|
|
|
if ( glyph_index == 0 )
|
|
return bbox;
|
|
|
|
FT_Error error = FT_Load_Glyph( faces_[f].face_, glyph_index,
|
|
FT_LOAD_DEFAULT );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_Glyph glyph;
|
|
error = FT_Get_Glyph( faces_[f].face_->glyph, &glyph );
|
|
if ( error != 0 )
|
|
return bbox;
|
|
|
|
FT_BBox ft_bbox;
|
|
FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_unscaled, &ft_bbox );
|
|
|
|
FT_Done_Glyph( glyph );
|
|
|
|
bbox = ft_bbox;
|
|
bbox.advance_ = faces_[f].face_->glyph->advance;
|
|
|
|
return bbox;
|
|
}
|
|
#endif /* OGLFT_NO_QT */
|
|
GLuint Texture::compileGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
bindTexture( face, glyph_index );
|
|
|
|
GLuint dlist = glGenLists( 1 );
|
|
glNewList( dlist, GL_COMPILE );
|
|
|
|
renderGlyph( face, glyph_index );
|
|
|
|
glEndList( );
|
|
|
|
return dlist;
|
|
}
|
|
|
|
void Texture::renderGlyph ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
TextureInfo texture_info;
|
|
|
|
GTOCI texture_object = glyph_texobjs_.find( glyph_index );
|
|
|
|
if ( texture_object == glyph_texobjs_.end() ) {
|
|
|
|
bindTexture( face, glyph_index );
|
|
|
|
texture_object = glyph_texobjs_.find( glyph_index );
|
|
|
|
if ( texture_object == glyph_texobjs_.end() )
|
|
return;
|
|
}
|
|
|
|
texture_info = texture_object->second;
|
|
|
|
glBindTexture( GL_TEXTURE_2D, texture_info.texture_name_ );
|
|
|
|
if ( character_rotation_.active_ ) {
|
|
glPushMatrix();
|
|
glTranslatef( ( texture_info.width_ / 2. +
|
|
texture_info.left_bearing_ ),
|
|
rotation_offset_y_, 0. );
|
|
|
|
if ( character_rotation_.x_ != 0. )
|
|
glRotatef( character_rotation_.x_, 1., 0., 0. );
|
|
|
|
if ( character_rotation_.y_ != 0. )
|
|
glRotatef( character_rotation_.y_, 0., 1., 0. );
|
|
|
|
if ( character_rotation_.z_ != 0. )
|
|
glRotatef( character_rotation_.z_, 0., 0., 1. );
|
|
|
|
glTranslatef( -( texture_info.width_ / 2. +
|
|
texture_info.left_bearing_ ),
|
|
-rotation_offset_y_, 0. );
|
|
}
|
|
|
|
glBegin( GL_QUADS );
|
|
|
|
glTexCoord2i( 0, 0 );
|
|
glVertex2f( texture_info.left_bearing_, texture_info.bottom_bearing_ );
|
|
|
|
glTexCoord2f( texture_info.texture_s_, 0. );
|
|
glVertex2f( texture_info.left_bearing_ + texture_info.width_,
|
|
texture_info.bottom_bearing_ );
|
|
|
|
glTexCoord2f( texture_info.texture_s_, texture_info.texture_t_ );
|
|
glVertex2f( texture_info.left_bearing_ + texture_info.width_,
|
|
texture_info.bottom_bearing_ + texture_info.height_ );
|
|
|
|
glTexCoord2f( 0., texture_info.texture_t_ );
|
|
glVertex2f( texture_info.left_bearing_,
|
|
texture_info.bottom_bearing_ + texture_info.height_ );
|
|
|
|
glEnd();
|
|
|
|
if ( character_rotation_.active_ ) {
|
|
glPopMatrix();
|
|
}
|
|
|
|
// Drawing a character always advances the MODELVIEW.
|
|
glTranslatef( texture_info.advance_.x / 64.,
|
|
texture_info.advance_.y / 64.,
|
|
0. );
|
|
}
|
|
|
|
void Texture::clearCaches ( void )
|
|
{
|
|
GDLI fgi = glyph_dlists_.begin();
|
|
|
|
for ( ; fgi != glyph_dlists_.end(); ++fgi ) {
|
|
glDeleteLists( fgi->second, 1 );
|
|
}
|
|
|
|
glyph_dlists_.clear();
|
|
|
|
GTOI fti = glyph_texobjs_.begin();
|
|
|
|
for ( ; fti != glyph_texobjs_.end(); ++fti ) {
|
|
glDeleteTextures( 1, &fti->second.texture_name_ );
|
|
}
|
|
|
|
glyph_texobjs_.clear();
|
|
}
|
|
|
|
unsigned int Texture::nearestPowerCeil ( unsigned int a )
|
|
{
|
|
unsigned int b = a;
|
|
unsigned int c = 1;
|
|
|
|
if ( a == 0 ) return 1;
|
|
|
|
// Take the log-2 of a
|
|
for ( ; ; ) {
|
|
if ( b == 1 )
|
|
break;
|
|
|
|
else if ( b == 3 ) {
|
|
c *= 4;
|
|
break;
|
|
}
|
|
|
|
b >>= 1;
|
|
c *= 2;
|
|
}
|
|
// If it's too small, raise it another power
|
|
if ( c < a ) c *= 2;
|
|
|
|
return c;
|
|
}
|
|
|
|
MonochromeTexture::MonochromeTexture ( const char* filename, float point_size,
|
|
FT_UInt resolution )
|
|
: Texture( filename, point_size, resolution )
|
|
{}
|
|
|
|
MonochromeTexture::MonochromeTexture ( FT_Face face, float point_size,
|
|
FT_UInt resolution )
|
|
: Texture( face, point_size, resolution )
|
|
{}
|
|
|
|
MonochromeTexture::~MonochromeTexture ( void )
|
|
{}
|
|
|
|
// Round up the size of the image to a power of two, but otherwise
|
|
// use the bitmap as is (i.e., don't expand it into separate
|
|
// luminance and alpha components)
|
|
|
|
GLubyte* MonochromeTexture::invertBitmap ( const FT_Bitmap& bitmap,
|
|
int* width, int* height )
|
|
{
|
|
*width = nearestPowerCeil( bitmap.width );
|
|
*height = nearestPowerCeil( bitmap.rows );
|
|
|
|
GLubyte* inverse = new GLubyte[ ( *width + 7) / 8 * *height ];
|
|
GLubyte* inverse_ptr = inverse;
|
|
|
|
memset( inverse, 0, sizeof( GLubyte )*( *width + 7 ) / 8 * *height );
|
|
|
|
for ( int r = 0; r < bitmap.rows; r++ ) {
|
|
|
|
GLubyte* bitmap_ptr = &bitmap.buffer[bitmap.pitch * ( bitmap.rows - r - 1 )];
|
|
|
|
for ( int p = 0; p < bitmap.pitch; p++ ) {
|
|
|
|
*inverse_ptr++ = *bitmap_ptr++;
|
|
}
|
|
|
|
inverse_ptr += ( ( *width + 7 ) / 8 - bitmap.pitch );
|
|
}
|
|
|
|
return inverse;
|
|
}
|
|
|
|
// Hmm. This is the only routine which is different between the different
|
|
// styles.
|
|
|
|
void MonochromeTexture::bindTexture ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
GTOCI texobj = glyph_texobjs_.find( glyph_index );
|
|
|
|
if ( texobj != glyph_texobjs_.end() )
|
|
return;
|
|
|
|
// Retrieve the glyph's data.
|
|
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
error = FT_Render_Glyph( face->glyph, FT_RENDER_MODE_MONO );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
TextureInfo texture_info;
|
|
|
|
glGenTextures( 1, &texture_info.texture_name_ );
|
|
glBindTexture( GL_TEXTURE_2D, texture_info.texture_name_ );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
|
|
|
|
// Texture maps have be a power of 2 in size (is 1 a power of 2?), so
|
|
// pad it out while flipping it over
|
|
int width, height;
|
|
GLubyte* inverted_pixmap =
|
|
invertBitmap( face->glyph->bitmap, &width, &height );
|
|
|
|
GLfloat red_map[2] = { background_color_[R], foreground_color_[R] };
|
|
GLfloat green_map[2] = { background_color_[G], foreground_color_[G] };
|
|
GLfloat blue_map[2] = { background_color_[B], foreground_color_[B] };
|
|
GLfloat alpha_map[2] = { background_color_[A], foreground_color_[A] };
|
|
|
|
glPixelMapfv( GL_PIXEL_MAP_I_TO_R, 2, red_map );
|
|
glPixelMapfv( GL_PIXEL_MAP_I_TO_G, 2, green_map );
|
|
glPixelMapfv( GL_PIXEL_MAP_I_TO_B, 2, blue_map );
|
|
glPixelMapfv( GL_PIXEL_MAP_I_TO_A, 2, alpha_map );
|
|
|
|
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, width, height,
|
|
0, GL_COLOR_INDEX, GL_BITMAP, inverted_pixmap );
|
|
|
|
// Save a good bit of the data about this glyph
|
|
texture_info.left_bearing_ = face->glyph->bitmap_left;
|
|
texture_info.bottom_bearing_ = -( face->glyph->bitmap.rows
|
|
- face->glyph->bitmap_top );
|
|
texture_info.width_ = face->glyph->bitmap.width;
|
|
texture_info.height_ = face->glyph->bitmap.rows;
|
|
texture_info.texture_s_ = (GLfloat)texture_info.width_ / width;
|
|
texture_info.texture_t_ = (GLfloat)texture_info.height_ / height;
|
|
texture_info.advance_ = face->glyph->advance;
|
|
|
|
glyph_texobjs_[ glyph_index ] = texture_info;
|
|
|
|
delete[] inverted_pixmap;
|
|
}
|
|
|
|
GrayscaleTexture::GrayscaleTexture ( const char* filename, float point_size,
|
|
FT_UInt resolution )
|
|
: Texture( filename, point_size, resolution )
|
|
{}
|
|
|
|
GrayscaleTexture::GrayscaleTexture ( FT_Face face, float point_size,
|
|
FT_UInt resolution )
|
|
: Texture( face, point_size, resolution )
|
|
{}
|
|
|
|
GrayscaleTexture::~GrayscaleTexture ( void )
|
|
{}
|
|
|
|
// For the grayscale style, the luminance is the grayscale FreeType value,
|
|
// so this just rounds up to a power of two and inverts the pixmap
|
|
|
|
GLubyte* GrayscaleTexture::invertPixmap ( const FT_Bitmap& bitmap,
|
|
int* width, int* height )
|
|
{
|
|
*width = nearestPowerCeil( bitmap.width );
|
|
*height = nearestPowerCeil( bitmap.rows );
|
|
|
|
GLubyte* inverse = new GLubyte[ *width * *height ];
|
|
GLubyte* inverse_ptr = inverse;
|
|
|
|
for ( int r = 0; r < bitmap.rows; r++ ) {
|
|
|
|
GLubyte* bitmap_ptr = &bitmap.buffer[bitmap.pitch * ( bitmap.rows - r - 1 )];
|
|
|
|
for ( int p = 0; p < bitmap.width; p++ ) {
|
|
*inverse_ptr++ = *bitmap_ptr++;
|
|
}
|
|
|
|
inverse_ptr += ( *width - bitmap.pitch );
|
|
}
|
|
return inverse;
|
|
}
|
|
|
|
// Hmm. This is the only routine which is different between the different
|
|
// styles.
|
|
|
|
void GrayscaleTexture::bindTexture ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
GTOCI texobj = glyph_texobjs_.find( glyph_index );
|
|
|
|
if ( texobj != glyph_texobjs_.end() )
|
|
return;
|
|
|
|
// Retrieve the glyph's data.
|
|
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
error = FT_Render_Glyph( face->glyph, FT_RENDER_MODE_NORMAL );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
TextureInfo texture_info;
|
|
|
|
glGenTextures( 1, &texture_info.texture_name_ );
|
|
glBindTexture( GL_TEXTURE_2D, texture_info.texture_name_ );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
|
|
|
|
// Texture maps have be a power of 2 in size (is 1 a power of 2?), so
|
|
// pad it out while flipping it over
|
|
int width, height;
|
|
GLubyte* inverted_pixmap =
|
|
invertPixmap( face->glyph->bitmap, &width, &height );
|
|
|
|
glPushAttrib( GL_PIXEL_MODE_BIT );
|
|
glPixelTransferf( GL_RED_SCALE, foreground_color_[R] - background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_SCALE, foreground_color_[G]-background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_SCALE, foreground_color_[B]-background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_SCALE, foreground_color_[A]-background_color_[A] );
|
|
glPixelTransferf( GL_RED_BIAS, background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_BIAS, background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_BIAS, background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_BIAS, background_color_[A] );
|
|
|
|
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, width, height,
|
|
0, GL_LUMINANCE, GL_UNSIGNED_BYTE, inverted_pixmap );
|
|
|
|
glPopAttrib();
|
|
// Save a good bit of the data about this glyph
|
|
texture_info.left_bearing_ = face->glyph->bitmap_left;
|
|
texture_info.bottom_bearing_ = -( face->glyph->bitmap.rows
|
|
- face->glyph->bitmap_top );
|
|
texture_info.width_ = face->glyph->bitmap.width;
|
|
texture_info.height_ = face->glyph->bitmap.rows;
|
|
texture_info.texture_s_ = (GLfloat)texture_info.width_ / width;
|
|
texture_info.texture_t_ = (GLfloat)texture_info.height_ / height;
|
|
texture_info.advance_ = face->glyph->advance;
|
|
|
|
glyph_texobjs_[ glyph_index ] = texture_info;
|
|
|
|
delete[] inverted_pixmap;
|
|
}
|
|
|
|
TranslucentTexture::TranslucentTexture ( const char* filename, float point_size,
|
|
FT_UInt resolution )
|
|
: Texture( filename, point_size, resolution )
|
|
{}
|
|
|
|
TranslucentTexture::TranslucentTexture ( FT_Face face, float point_size,
|
|
FT_UInt resolution )
|
|
: Texture( face, point_size, resolution )
|
|
{}
|
|
|
|
TranslucentTexture::~TranslucentTexture ( void )
|
|
{}
|
|
|
|
// For the translucent style, the luminance is saturated and alpha value
|
|
// is the translucent FreeType value
|
|
|
|
GLubyte* TranslucentTexture::invertPixmap ( const FT_Bitmap& bitmap,
|
|
int* width, int* height )
|
|
{
|
|
*width = nearestPowerCeil( bitmap.width );
|
|
*height = nearestPowerCeil( bitmap.rows );
|
|
|
|
GLubyte* inverse = new GLubyte[ 2 * *width * *height ];
|
|
GLubyte* inverse_ptr = inverse;
|
|
|
|
for ( int r = 0; r < bitmap.rows; r++ ) {
|
|
|
|
GLubyte* bitmap_ptr = &bitmap.buffer[bitmap.pitch * ( bitmap.rows - r - 1 )];
|
|
|
|
for ( int p = 0; p < bitmap.width; p++ ) {
|
|
*inverse_ptr++ = 0xff;
|
|
*inverse_ptr++ = *bitmap_ptr++;
|
|
}
|
|
|
|
inverse_ptr += 2 * ( *width - bitmap.pitch );
|
|
}
|
|
return inverse;
|
|
}
|
|
|
|
// Hmm. This is the only routine which is different between the different
|
|
// styles.
|
|
|
|
void TranslucentTexture::bindTexture ( FT_Face face, FT_UInt glyph_index )
|
|
{
|
|
GTOCI texobj = glyph_texobjs_.find( glyph_index );
|
|
|
|
if ( texobj != glyph_texobjs_.end() )
|
|
return;
|
|
|
|
// Retrieve the glyph's data.
|
|
|
|
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
error = FT_Render_Glyph( face->glyph, FT_RENDER_MODE_NORMAL );
|
|
|
|
if ( error != 0 )
|
|
return;
|
|
|
|
TextureInfo texture_info;
|
|
|
|
glGenTextures( 1, &texture_info.texture_name_ );
|
|
glBindTexture( GL_TEXTURE_2D, texture_info.texture_name_ );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
|
|
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
|
|
|
|
// Texture maps have be a power of 2 in size (is 1 a power of 2?), so
|
|
// pad it out while flipping it over
|
|
int width, height;
|
|
GLubyte* inverted_pixmap =
|
|
invertPixmap( face->glyph->bitmap, &width, &height );
|
|
|
|
glPushAttrib( GL_PIXEL_MODE_BIT );
|
|
glPixelTransferf( GL_RED_SCALE, foreground_color_[R] - background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_SCALE, foreground_color_[G]-background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_SCALE, foreground_color_[B]-background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_SCALE, foreground_color_[A]-background_color_[A] );
|
|
glPixelTransferf( GL_RED_BIAS, background_color_[R] );
|
|
glPixelTransferf( GL_GREEN_BIAS, background_color_[G] );
|
|
glPixelTransferf( GL_BLUE_BIAS, background_color_[B] );
|
|
glPixelTransferf( GL_ALPHA_BIAS, background_color_[A] );
|
|
|
|
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, width, height,
|
|
0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, inverted_pixmap );
|
|
|
|
glPopAttrib();
|
|
|
|
// Save a good bit of the data about this glyph
|
|
texture_info.left_bearing_ = face->glyph->bitmap_left;
|
|
texture_info.bottom_bearing_ = -( face->glyph->bitmap.rows
|
|
- face->glyph->bitmap_top );
|
|
texture_info.width_ = face->glyph->bitmap.width;
|
|
texture_info.height_ = face->glyph->bitmap.rows;
|
|
texture_info.texture_s_ = (GLfloat)texture_info.width_ / width;
|
|
texture_info.texture_t_ = (GLfloat)texture_info.height_ / height;
|
|
texture_info.advance_ = face->glyph->advance;
|
|
|
|
glyph_texobjs_[ glyph_index ] = texture_info;
|
|
|
|
delete[] inverted_pixmap;
|
|
}
|
|
|
|
} // close OGLFT namespace
|