568 lines
17 KiB
C
568 lines
17 KiB
C
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//========================================================================
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// GLFW - An OpenGL framework
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// Platform: X11/GLX
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// API version: 2.7
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// WWW: http://www.glfw.org/
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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#include <limits.h>
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//************************************************************************
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//**** GLFW internal functions ****
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//************************************************************************
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//========================================================================
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// Convert BPP to RGB bits (based on "best guess")
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//========================================================================
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static void BPP2RGB( int bpp, int *r, int *g, int *b )
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{
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int delta;
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// Special case: BPP = 32 (I don't think this is necessary for X11??)
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if( bpp == 32 )
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bpp = 24;
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// Convert "bits per pixel" to red, green & blue sizes
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*r = *g = *b = bpp / 3;
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delta = bpp - (*r * 3);
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if( delta >= 1 )
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{
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*g = *g + 1;
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}
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if( delta == 2 )
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{
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*r = *r + 1;
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}
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}
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//========================================================================
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// Finds the video mode closest in size to the specified desired size
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//========================================================================
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int _glfwGetClosestVideoMode( int screen, int *width, int *height, int *rate )
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{
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#if defined( _GLFW_HAS_XRANDR )
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int i, match, bestmatch;
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int sizecount, bestsize;
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int ratecount, bestrate;
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short *ratelist;
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XRRScreenConfiguration *sc;
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XRRScreenSize *sizelist;
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if( _glfwLibrary.XRandR.available )
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{
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sc = XRRGetScreenInfo( _glfwLibrary.display,
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RootWindow( _glfwLibrary.display, screen ) );
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sizelist = XRRConfigSizes( sc, &sizecount );
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// Find the best matching mode
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bestsize = -1;
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bestmatch = INT_MAX;
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for( i = 0; i < sizecount; i++ )
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{
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match = (*width - sizelist[i].width) *
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(*width - sizelist[i].width) +
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(*height - sizelist[i].height) *
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(*height - sizelist[i].height);
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if( match < bestmatch )
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{
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bestmatch = match;
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bestsize = i;
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}
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}
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if( bestsize != -1 )
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{
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// Report width & height of best matching mode
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*width = sizelist[bestsize].width;
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*height = sizelist[bestsize].height;
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if( *rate > 0 )
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{
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ratelist = XRRConfigRates( sc, bestsize, &ratecount );
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bestrate = -1;
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bestmatch = INT_MAX;
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for( i = 0; i < ratecount; i++ )
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{
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match = abs( ratelist[i] - *rate );
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if( match < bestmatch )
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{
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bestmatch = match;
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bestrate = ratelist[i];
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}
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}
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if( bestrate != -1 )
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{
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*rate = bestrate;
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}
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}
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}
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// Free modelist
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XRRFreeScreenConfigInfo( sc );
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if( bestsize != -1 )
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{
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return bestsize;
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}
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}
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#elif defined( _GLFW_HAS_XF86VIDMODE )
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XF86VidModeModeInfo **modelist;
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int modecount, i, bestmode, bestmatch, match;
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// Use the XF86VidMode extension to control video resolution
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if( _glfwLibrary.XF86VidMode.available )
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{
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// Get a list of all available display modes
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XF86VidModeGetAllModeLines( _glfwLibrary.display, screen,
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&modecount, &modelist );
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// Find the best matching mode
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bestmode = -1;
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bestmatch = INT_MAX;
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for( i = 0; i < modecount; i++ )
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{
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match = (*width - modelist[i]->hdisplay) *
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(*width - modelist[i]->hdisplay) +
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(*height - modelist[i]->vdisplay) *
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(*height - modelist[i]->vdisplay);
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if( match < bestmatch )
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{
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bestmatch = match;
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bestmode = i;
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}
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}
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if( bestmode != -1 )
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{
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// Report width & height of best matching mode
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*width = modelist[ bestmode ]->hdisplay;
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*height = modelist[ bestmode ]->vdisplay;
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}
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// Free modelist
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XFree( modelist );
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if( bestmode != -1 )
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{
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return bestmode;
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}
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}
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#endif
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// Default: Simply use the screen resolution
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*width = DisplayWidth( _glfwLibrary.display, screen );
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*height = DisplayHeight( _glfwLibrary.display, screen );
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return 0;
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}
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//========================================================================
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// Change the current video mode
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//========================================================================
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void _glfwSetVideoModeMODE( int screen, int mode, int rate )
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{
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#if defined( _GLFW_HAS_XRANDR )
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XRRScreenConfiguration *sc;
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Window root;
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if( _glfwLibrary.XRandR.available )
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{
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root = RootWindow( _glfwLibrary.display, screen );
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sc = XRRGetScreenInfo( _glfwLibrary.display, root );
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// Remember old size and flag that we have changed the mode
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if( !_glfwWin.FS.modeChanged )
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{
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_glfwWin.FS.oldSizeID = XRRConfigCurrentConfiguration( sc, &_glfwWin.FS.oldRotation );
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_glfwWin.FS.oldWidth = DisplayWidth( _glfwLibrary.display, screen );
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_glfwWin.FS.oldHeight = DisplayHeight( _glfwLibrary.display, screen );
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_glfwWin.FS.modeChanged = GL_TRUE;
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}
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if( rate > 0 )
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{
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// Set desired configuration
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XRRSetScreenConfigAndRate( _glfwLibrary.display,
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sc,
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root,
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mode,
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RR_Rotate_0,
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(short) rate,
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CurrentTime );
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}
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else
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{
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// Set desired configuration
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XRRSetScreenConfig( _glfwLibrary.display,
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sc,
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root,
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mode,
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RR_Rotate_0,
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CurrentTime );
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}
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XRRFreeScreenConfigInfo( sc );
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}
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#elif defined( _GLFW_HAS_XF86VIDMODE )
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XF86VidModeModeInfo **modelist;
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int modecount;
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// Use the XF86VidMode extension to control video resolution
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if( _glfwLibrary.XF86VidMode.available )
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{
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// Get a list of all available display modes
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XF86VidModeGetAllModeLines( _glfwLibrary.display, screen,
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&modecount, &modelist );
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// Unlock mode switch if necessary
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if( _glfwWin.FS.modeChanged )
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{
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XF86VidModeLockModeSwitch( _glfwLibrary.display, screen, 0 );
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}
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// Change the video mode to the desired mode
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XF86VidModeSwitchToMode( _glfwLibrary.display, screen,
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modelist[ mode ] );
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// Set viewport to upper left corner (where our window will be)
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XF86VidModeSetViewPort( _glfwLibrary.display, screen, 0, 0 );
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// Lock mode switch
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XF86VidModeLockModeSwitch( _glfwLibrary.display, screen, 1 );
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// Remember old mode and flag that we have changed the mode
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if( !_glfwWin.FS.modeChanged )
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{
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_glfwWin.FS.oldMode = *modelist[ 0 ];
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_glfwWin.FS.modeChanged = GL_TRUE;
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}
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// Free mode list
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XFree( modelist );
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}
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#endif
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}
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//========================================================================
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// Change the current video mode
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//========================================================================
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void _glfwSetVideoMode( int screen, int *width, int *height, int *rate )
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{
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int bestmode;
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// Find a best match mode
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bestmode = _glfwGetClosestVideoMode( screen, width, height, rate );
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// Change mode
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_glfwSetVideoModeMODE( screen, bestmode, *rate );
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}
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//========================================================================
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// Restore the previously saved (original) video mode
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//========================================================================
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void _glfwRestoreVideoMode( void )
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{
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if( _glfwWin.FS.modeChanged )
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{
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#if defined( _GLFW_HAS_XRANDR )
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if( _glfwLibrary.XRandR.available )
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{
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XRRScreenConfiguration *sc;
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sc = XRRGetScreenInfo( _glfwLibrary.display, _glfwWin.root );
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XRRSetScreenConfig( _glfwLibrary.display,
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sc,
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_glfwWin.root,
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_glfwWin.FS.oldSizeID,
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_glfwWin.FS.oldRotation,
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CurrentTime );
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XRRFreeScreenConfigInfo( sc );
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}
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#elif defined( _GLFW_HAS_XF86VIDMODE )
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if( _glfwLibrary.XF86VidMode.available )
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{
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// Unlock mode switch
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XF86VidModeLockModeSwitch( _glfwLibrary.display, _glfwWin.screen, 0 );
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// Change the video mode back to the old mode
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XF86VidModeSwitchToMode( _glfwLibrary.display,
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_glfwWin.screen,
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&_glfwWin.FS.oldMode );
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}
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#endif
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_glfwWin.FS.modeChanged = GL_FALSE;
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}
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}
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//************************************************************************
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//**** Platform implementation functions ****
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//************************************************************************
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struct _glfwResolution
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{
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int width;
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int height;
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};
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//========================================================================
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// List available video modes
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//========================================================================
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int _glfwPlatformGetVideoModes( GLFWvidmode *list, int maxcount )
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{
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int count, k, l, r, g, b, rgba, gl;
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int depth, screen;
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Display *dpy;
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XVisualInfo *vislist, dummy;
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int viscount, rgbcount, rescount;
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int *rgbarray;
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struct _glfwResolution *resarray;
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// Get display and screen
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dpy = _glfwLibrary.display;
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screen = DefaultScreen( dpy );
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// Get list of visuals
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vislist = XGetVisualInfo( dpy, 0, &dummy, &viscount );
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if( vislist == NULL )
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{
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return 0;
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}
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rgbarray = (int*) malloc( sizeof(int) * viscount );
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rgbcount = 0;
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// Build RGB array
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for( k = 0; k < viscount; k++ )
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{
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// Does the visual support OpenGL & true color?
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glXGetConfig( dpy, &vislist[k], GLX_USE_GL, &gl );
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glXGetConfig( dpy, &vislist[k], GLX_RGBA, &rgba );
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if( gl && rgba )
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{
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// Get color depth for this visual
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depth = vislist[k].depth;
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// Convert to RGB
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BPP2RGB( depth, &r, &g, &b );
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depth = (r<<16) | (g<<8) | b;
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// Is this mode unique?
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for( l = 0; l < rgbcount; l++ )
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{
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if( depth == rgbarray[ l ] )
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{
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break;
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}
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}
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if( l >= rgbcount )
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{
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rgbarray[ rgbcount ] = depth;
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rgbcount++;
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}
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}
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}
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||
|
|
|
||
|
|
rescount = 0;
|
||
|
|
resarray = NULL;
|
||
|
|
|
||
|
|
// Build resolution array
|
||
|
|
#if defined( _GLFW_HAS_XRANDR )
|
||
|
|
if( _glfwLibrary.XRandR.available )
|
||
|
|
{
|
||
|
|
XRRScreenConfiguration *sc;
|
||
|
|
XRRScreenSize *sizelist;
|
||
|
|
int sizecount;
|
||
|
|
|
||
|
|
sc = XRRGetScreenInfo( dpy, RootWindow( dpy, screen ) );
|
||
|
|
sizelist = XRRConfigSizes( sc, &sizecount );
|
||
|
|
|
||
|
|
resarray = (struct _glfwResolution*) malloc( sizeof(struct _glfwResolution) * sizecount );
|
||
|
|
|
||
|
|
for( k = 0; k < sizecount; k++ )
|
||
|
|
{
|
||
|
|
resarray[ rescount ].width = sizelist[ k ].width;
|
||
|
|
resarray[ rescount ].height = sizelist[ k ].height;
|
||
|
|
rescount++;
|
||
|
|
}
|
||
|
|
|
||
|
|
XRRFreeScreenConfigInfo( sc );
|
||
|
|
}
|
||
|
|
#elif defined( _GLFW_HAS_XF86VIDMODE )
|
||
|
|
if( _glfwLibrary.XF86VidMode.available )
|
||
|
|
{
|
||
|
|
XF86VidModeModeInfo **modelist;
|
||
|
|
int modecount, width, height;
|
||
|
|
|
||
|
|
XF86VidModeGetAllModeLines( dpy, screen, &modecount, &modelist );
|
||
|
|
|
||
|
|
resarray = (struct _glfwResolution*) malloc( sizeof(struct _glfwResolution) * modecount );
|
||
|
|
|
||
|
|
for( k = 0; k < modecount; k++ )
|
||
|
|
{
|
||
|
|
width = modelist[ k ]->hdisplay;
|
||
|
|
height = modelist[ k ]->vdisplay;
|
||
|
|
|
||
|
|
// Is this mode unique?
|
||
|
|
for( l = 0; l < rescount; l++ )
|
||
|
|
{
|
||
|
|
if( width == resarray[ l ].width && height == resarray[ l ].height )
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if( l >= rescount )
|
||
|
|
{
|
||
|
|
resarray[ rescount ].width = width;
|
||
|
|
resarray[ rescount ].height = height;
|
||
|
|
rescount++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
XFree( modelist );
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if( !resarray )
|
||
|
|
{
|
||
|
|
rescount = 1;
|
||
|
|
resarray = (struct _glfwResolution*) malloc( sizeof(struct _glfwResolution) * rescount );
|
||
|
|
|
||
|
|
resarray[ 0 ].width = DisplayWidth( dpy, screen );
|
||
|
|
resarray[ 0 ].height = DisplayHeight( dpy, screen );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Build permutations of colors and resolutions
|
||
|
|
count = 0;
|
||
|
|
for( k = 0; k < rgbcount && count < maxcount; k++ )
|
||
|
|
{
|
||
|
|
for( l = 0; l < rescount && count < maxcount; l++ )
|
||
|
|
{
|
||
|
|
list[count].Width = resarray[ l ].width;
|
||
|
|
list[count].Height = resarray[ l ].height;
|
||
|
|
list[count].RedBits = (rgbarray[ k ] >> 16) & 255;
|
||
|
|
list[count].GreenBits = (rgbarray[ k ] >> 8) & 255;
|
||
|
|
list[count].BlueBits = rgbarray[ k ] & 255;
|
||
|
|
count++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Free visuals list
|
||
|
|
XFree( vislist );
|
||
|
|
|
||
|
|
free( resarray );
|
||
|
|
free( rgbarray );
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//========================================================================
|
||
|
|
// Get the desktop video mode
|
||
|
|
//========================================================================
|
||
|
|
|
||
|
|
void _glfwPlatformGetDesktopMode( GLFWvidmode *mode )
|
||
|
|
{
|
||
|
|
Display *dpy;
|
||
|
|
int bpp, screen;
|
||
|
|
|
||
|
|
// Get display and screen
|
||
|
|
dpy = _glfwLibrary.display;
|
||
|
|
screen = DefaultScreen( dpy );
|
||
|
|
|
||
|
|
// Get display depth
|
||
|
|
bpp = DefaultDepth( dpy, screen );
|
||
|
|
|
||
|
|
// Convert BPP to RGB bits
|
||
|
|
BPP2RGB( bpp, &mode->RedBits, &mode->GreenBits, &mode->BlueBits );
|
||
|
|
|
||
|
|
#if defined( _GLFW_HAS_XRANDR )
|
||
|
|
if( _glfwLibrary.XRandR.available )
|
||
|
|
{
|
||
|
|
if( _glfwWin.FS.modeChanged )
|
||
|
|
{
|
||
|
|
mode->Width = _glfwWin.FS.oldWidth;
|
||
|
|
mode->Height = _glfwWin.FS.oldHeight;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#elif defined( _GLFW_HAS_XF86VIDMODE )
|
||
|
|
if( _glfwLibrary.XF86VidMode.available )
|
||
|
|
{
|
||
|
|
XF86VidModeModeInfo **modelist;
|
||
|
|
int modecount;
|
||
|
|
|
||
|
|
if( _glfwWin.FS.modeChanged )
|
||
|
|
{
|
||
|
|
// The old (desktop) mode is stored in _glfwWin.FS.oldMode
|
||
|
|
mode->Width = _glfwWin.FS.oldMode.hdisplay;
|
||
|
|
mode->Height = _glfwWin.FS.oldMode.vdisplay;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Use the XF86VidMode extension to get list of video modes
|
||
|
|
XF86VidModeGetAllModeLines( dpy, screen, &modecount,
|
||
|
|
&modelist );
|
||
|
|
|
||
|
|
// The first mode in the list is the current (desktio) mode
|
||
|
|
mode->Width = modelist[ 0 ]->hdisplay;
|
||
|
|
mode->Height = modelist[ 0 ]->vdisplay;
|
||
|
|
|
||
|
|
// Free list
|
||
|
|
XFree( modelist );
|
||
|
|
}
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Get current display width and height
|
||
|
|
mode->Width = DisplayWidth( dpy, screen );
|
||
|
|
mode->Height = DisplayHeight( dpy, screen );
|
||
|
|
}
|
||
|
|
|