72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*
|
|
* Copyright 2013 Jeremie Roy. All rights reserved.
|
|
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
|
|
*/
|
|
|
|
#ifndef TEXT_METRICS_H_HEADER_GUARD
|
|
#define TEXT_METRICS_H_HEADER_GUARD
|
|
|
|
#include "font_manager.h"
|
|
|
|
class TextMetrics
|
|
{
|
|
public:
|
|
TextMetrics(FontManager* _fontManager);
|
|
|
|
/// Append an ASCII/utf-8 string to the metrics helper.
|
|
void appendText(FontHandle _fontHandle, const char* _string);
|
|
|
|
/// Append a wide char string to the metrics helper.
|
|
void appendText(FontHandle _fontHandle, const wchar_t* _string);
|
|
|
|
/// Return the width of the measured text.
|
|
float getWidth() const { return m_width; }
|
|
|
|
/// Return the height of the measured text.
|
|
float getHeight() const { return m_height; }
|
|
|
|
/// Clear the width and height of the measured text.
|
|
void clearText();
|
|
|
|
private:
|
|
FontManager* m_fontManager;
|
|
float m_width;
|
|
float m_height;
|
|
float m_x;
|
|
float m_lineHeight;
|
|
float m_lineGap;
|
|
};
|
|
|
|
/// Compute text crop area for text using a single font.
|
|
class TextLineMetrics
|
|
{
|
|
public:
|
|
TextLineMetrics(const FontInfo& _fontInfo);
|
|
|
|
/// Return the height of a line of text using the given font.
|
|
float getLineHeight() const { return m_lineHeight; }
|
|
|
|
/// Return the number of text line in the given text.
|
|
uint32_t getLineCount(const char* _string) const;
|
|
|
|
/// Return the number of text line in the given text.
|
|
uint32_t getLineCount(const wchar_t* _string) const;
|
|
|
|
/// Return the first and last character visible in the [_firstLine, _lastLine] range.
|
|
void getSubText(const char* _string, uint32_t _firstLine, uint32_t _lastLine, const char*& _begin, const char*& _end);
|
|
|
|
/// Return the first and last character visible in the [_firstLine, _lastLine] range.
|
|
void getSubText(const wchar_t* _string, uint32_t _firstLine, uint32_t _lastLine, const wchar_t*& _begin, const wchar_t*& _end);
|
|
|
|
/// Return the first and last character visible in the [_top, _bottom] range,
|
|
void getVisibleText(const char* _string, float _top, float _bottom, const char*& _begin, const char*& _end);
|
|
|
|
/// Return the first and last character visible in the [_top, _bottom] range,
|
|
void getVisibleText(const wchar_t* _string, float _top, float _bottom, const wchar_t*& _begin, const wchar_t*& _end);
|
|
|
|
private:
|
|
float m_lineHeight;
|
|
};
|
|
|
|
#endif // TEXT_METRICS_H_HEADER_GUARD
|