usbloadergx/source/FreeTypeGX.h
2010-09-24 00:48:03 +00:00

150 lines
6.0 KiB
C++

/*
* FreeTypeGX is a wrapper class for libFreeType which renders a compiled
* FreeType parsable font into a GX texture for Wii homebrew development.
* Copyright (C) 2008 Armin Tamzarian
* Modified by Dimok, 2010
*
* This file is part of FreeTypeGX.
*
* FreeTypeGX is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* FreeTypeGX is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FreeTypeGX. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FREETYPEGX_H_
#define FREETYPEGX_H_
#include <gccore.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_BITMAP_H
#include <malloc.h>
#include <string.h>
#include <wchar.h>
#include <map>
/*! \struct ftgxCharData_
*
* Font face character glyph relevant data structure.
*/
typedef struct ftgxCharData_
{
int16_t renderOffsetX; /**< Texture X axis bearing offset. */
uint16_t glyphAdvanceX; /**< Character glyph X coordinate advance in pixels. */
uint32_t glyphIndex; /**< Charachter glyph index in the font face. */
uint16_t textureWidth; /**< Texture width in pixels/bytes. */
uint16_t textureHeight; /**< Texture glyph height in pixels/bytes. */
int16_t renderOffsetY; /**< Texture Y axis bearing offset. */
int16_t renderOffsetMax; /**< Texture Y axis bearing maximum value. */
int16_t renderOffsetMin; /**< Texture Y axis bearing minimum value. */
uint8_t* glyphDataTexture; /**< Glyph texture bitmap data buffer. */
} ftgxCharData;
/*! \struct ftgxDataOffset_
*
* Offset structure which hold both a maximum and minimum value.
*/
typedef struct ftgxDataOffset_
{
int16_t ascender; /**< Maximum data offset. */
int16_t descender; /**< Minimum data offset. */
int16_t max; /**< Maximum data offset. */
int16_t min; /**< Minimum data offset. */
} ftgxDataOffset;
typedef struct ftgxCharData_ ftgxCharData;
typedef struct ftgxDataOffset_ ftgxDataOffset;
#define _TEXT(t) L ## t /**< Unicode helper macro. */
#define FTGX_NULL 0x0000
#define FTGX_JUSTIFY_LEFT 0x0001
#define FTGX_JUSTIFY_CENTER 0x0002
#define FTGX_JUSTIFY_RIGHT 0x0004
#define FTGX_JUSTIFY_MASK 0x000f
#define FTGX_ALIGN_TOP 0x0010
#define FTGX_ALIGN_MIDDLE 0x0020
#define FTGX_ALIGN_BOTTOM 0x0040
#define FTGX_ALIGN_BASELINE 0x0080
#define FTGX_ALIGN_GLYPH_TOP 0x0100
#define FTGX_ALIGN_GLYPH_MIDDLE 0x0200
#define FTGX_ALIGN_GLYPH_BOTTOM 0x0400
#define FTGX_ALIGN_MASK 0x0ff0
#define FTGX_STYLE_UNDERLINE 0x1000
#define FTGX_STYLE_STRIKE 0x2000
#define FTGX_STYLE_MASK 0xf000
const GXColor ftgxWhite = ( GXColor )
{ 0xff, 0xff, 0xff, 0xff}; /**< Constant color value used only to sanitize Doxygen documentation. */
wchar_t* charToWideChar(const char* p);
/*! \class FreeTypeGX
* \brief Wrapper class for the libFreeType library with GX rendering.
* \author Armin Tamzarian
* \version 0.2.4
*
* FreeTypeGX acts as a wrapper class for the libFreeType library. It supports precaching of transformed glyph data into
* a specified texture format. Rendering of the data to the EFB is accomplished through the application of high performance
* GX texture functions resulting in high throughput of string rendering.
*/
class FreeTypeGX
{
private:
FT_Library ftLibrary; /**< FreeType FT_Library instance. */
FT_Face ftFace; /**< FreeType reusable FT_Face typographic object. */
int16_t ftPointSize; /**< Current set size of the rendered font. */
bool ftKerningEnabled; /**< Flag indicating the availability of font kerning data. */
uint8_t vertexIndex; /**< Vertex format descriptor index. */
std::map<int16_t, std::map<wchar_t, ftgxCharData> > fontData; /**< Map which holds the glyph data structures for the corresponding characters in one size. */
std::map<int16_t, ftgxDataOffset> ftgxAlign; /**< Map which holds the ascender and decender for different sizes. */
int16_t getStyleOffsetWidth(uint16_t width, uint16_t format);
int16_t getStyleOffsetHeight(int16_t format, uint16_t pixelSize);
void unloadFont();
ftgxCharData *cacheGlyphData(wchar_t charCode, int16_t pixelSize);
uint16_t cacheGlyphDataComplete(int16_t pixelSize);
void loadGlyphData(FT_Bitmap *bmp, ftgxCharData *charData);
void setDefaultMode();
void drawTextFeature(int16_t x, int16_t y, int16_t z, int16_t pixelSize, uint16_t width,
ftgxDataOffset *offsetData, uint16_t format, GXColor color);
void copyTextureToFramebuffer(GXTexObj *texObj, f32 texWidth, f32 texHeight, int16_t screenX, int16_t screenY,
int16_t screenZ, GXColor color);
void copyFeatureToFramebuffer(f32 featureWidth, f32 featureHeight, int16_t screenX, int16_t screenY,
int16_t screenZ, GXColor color);
public:
FreeTypeGX(const uint8_t* fontBuffer, FT_Long bufferSize);
~FreeTypeGX();
void setVertexFormat(uint8_t vertexIndex);
uint16_t drawText(int16_t x, int16_t y, int16_t z, const wchar_t *text, int16_t pixelSize, GXColor color =
ftgxWhite, uint16_t textStyling = FTGX_NULL, uint16_t textWidth = 0, uint16_t widthLimit = 0);
uint16_t getWidth(const wchar_t *text, int16_t pixelSize);
uint16_t getCharWidth(const wchar_t wChar, int16_t pixelSize, const wchar_t prevChar = 0x0000);
uint16_t getHeight(const wchar_t *text, int16_t pixelSize);
void getOffset(const wchar_t *text, int16_t pixelSize, uint16_t widthLimit = 0);
};
#endif /* FREETYPEGX_H_ */