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/*
* FTGL - OpenGL font library
*
* Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
* Copyright (c) 2008 Sam Hocevar <sam@zoy.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __FTTextureFontImpl__
#define __FTTextureFontImpl__
#include "FTFontImpl.h"
#include "FTVector.h"
class FTTextureGlyph;
class FTTextureFontImpl : public FTFontImpl
{
friend class FTTextureFont;
protected:
FTTextureFontImpl(FTFont *ftFont, const char* fontFilePath);
FTTextureFontImpl(FTFont *ftFont, const unsigned char *pBufferBytes,
size_t bufferSizeInBytes);
virtual ~FTTextureFontImpl();
/**
* Set the char size for the current face.
*
* @param size the face size in points (1/72 inch)
* @param res the resolution of the target device.
* @return <code>true</code> if size was set correctly
*/
virtual bool FaceSize(const unsigned int size,
const unsigned int res = 72);
virtual FTPoint Render(const char *s, const int len,
FTPoint position, FTPoint spacing,
int renderMode);
virtual FTPoint Render(const wchar_t *s, const int len,
FTPoint position, FTPoint spacing,
int renderMode);
private:
/**
* Create an FTTextureGlyph object for the base class.
*/
FTGlyph* MakeGlyphImpl(FT_GlyphSlot ftGlyph);
/**
* Get the size of a block of memory required to layout the glyphs
*
* Calculates a width and height based on the glyph sizes and the
* number of glyphs. It over estimates.
*/
inline void CalculateTextureSize();
/**
* Creates a 'blank' OpenGL texture object.
*
* The format is GL_ALPHA and the params are
* GL_TEXTURE_WRAP_S = GL_CLAMP
* GL_TEXTURE_WRAP_T = GL_CLAMP
* GL_TEXTURE_MAG_FILTER = GL_LINEAR
* GL_TEXTURE_MIN_FILTER = GL_LINEAR
* Note that mipmapping is NOT used
*/
inline GLuint CreateTexture();
/**
* The maximum texture dimension on this OpenGL implemetation
*/
GLsizei maximumGLTextureSize;
/**
* The minimum texture width required to hold the glyphs
*/
GLsizei textureWidth;
/**
* The minimum texture height required to hold the glyphs
*/
GLsizei textureHeight;
/**
*An array of texture ids
*/
FTVector<GLuint> textureIDList;
/**
* The max height for glyphs in the current font
*/
int glyphHeight;
/**
* The max width for glyphs in the current font
*/
int glyphWidth;
/**
* A value to be added to the height and width to ensure that
* glyphs don't overlap in the texture
*/
unsigned int padding;
/**
*
*/
unsigned int numGlyphs;
/**
*/
unsigned int remGlyphs;
/**
*/
int xOffset;
/**
*/
int yOffset;
/* Internal generic Render() implementation */
template <typename T>
inline FTPoint RenderI(const T *s, const int len,
FTPoint position, FTPoint spacing, int mode);
};
#endif // __FTTextureFontImpl__
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