113 lines
3.6 KiB
C++
113 lines
3.6 KiB
C++
//**************************************************************
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//* OpenGLide - Glide to OpenGL Wrapper
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//* http://openglide.sourceforge.net
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//*
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//* framebuffer emulation
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//*
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//* OpenGLide is OpenSource under LGPL license
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//* Mac version and additional features by Jens-Olaf Hemprich
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//**************************************************************
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#pragma once
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class Framebuffer
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{
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public:
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Framebuffer();
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~Framebuffer();
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static const int MaxTiles = 12;
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struct tilesize {GLint y; GLint x[MaxTiles];};
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public:
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bool initialise_buffers(BufferStruct* framebuffer, BufferStruct* texbuffer, FxU32 width, FxU32 height, const tilesize* tilesizetable);
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bool initialise_buffers(BufferStruct* framebuffer, BufferStruct* texbuffer, FxU32 width, FxU32 height, FxU32 x_tile, FxU32 y_tile);
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void free_buffers();
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void initialise_format(GrLfbWriteMode_t format);
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bool begin_write();
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void end_write(FxU32 alpha, GLfloat depth);
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void end_write_opaque();
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inline FxU16 GetChromaKeyValue() {return m_ChromaKey.Scalar;};
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inline void SetChromaKeyValue(FxU16 chromakey)
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{
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#ifdef __ALTIVEC__
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for(int i = 0; i < 8; i++)
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{
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(&m_ChromaKey.Scalar)[i] = chromakey;
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}
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#else
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m_ChromaKey.Scalar = chromakey;
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#endif
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}
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protected:
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void Clear();
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int buildVertexArrays();
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int buildVertexArrays(const tilesize* tilesizetable, int vertexarrayindex);
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void set_gl_state();
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void restore_gl_state();
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// Pixel conversion
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enum TileUpdateState
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{
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TileUpdateState_TileEmpty = false,
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TileUpdateState_TileDownloadToGPU = 1, // true,
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TileUpdateState_TileDrawOnly = -1 // -true
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};
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static const int s_maxTiles = MaxTiles * MaxTiles;
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GLuint m_textureNames[s_maxTiles];
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inline TileUpdateState createTextureData(FxU32* texbuffer, FxU32 x, FxU32 y, FxU32 x_step, FxU32 y_step, int checksumIndex);
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inline TileUpdateState Convert565Kto8888(FxU16* buffer1, FxU32* buffer2, register FxU32 width, register FxU32 height, register FxU32 stride);
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#ifdef __ALTIVEC__
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inline TileUpdateState Convert565Kto8888_AV(FxU16* buffer1, FxU32* buffer2, register FxU32 width, register FxU32 height, register FxU32 stride, int checksumIndex);
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vector unsigned long m_tileChecksums[s_maxTiles];
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#endif
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inline TileUpdateState Convert1555Kto8888(FxU16* buffer1, register FxU32* buffer2, FxU32 register width, register FxU32 height, register FxU32 stride);
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inline TileUpdateState ConvertARGB8888Kto8888(FxU32* buffer1, register FxU32* buffer2, FxU32 register width, register FxU32 height, register FxU32 stride);
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bool m_useRectangleARB;
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bool m_must_clear_buffer;
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// Format
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GrOriginLocation_t m_origin;
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GLint m_glInternalFormat;
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GLint m_glFormat;
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GLint m_glType;
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bool m_format_valid;
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BufferStruct* m_framebuffer;
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BufferStruct* m_texbuffer;
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// Dimensions
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FxU32 m_width;
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FxU32 m_height;
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GLint m_x_step_start;
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GLint m_y_step_start;
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GLint m_x_step_start_opaque;
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GLint m_y_step_start_opaque;
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// Tiles
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inline int getTileCount() const;
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tilesize m_tilesizes[MaxTiles];
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int m_tilesizesCount;
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int m_tilesizesVertexArrayIndex;
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const tilesize* m_custom_tilesizes;
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int m_customtilesizesCount;
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int m_customtilesizesVertexArrayIndex;
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// Color, depth and alpha
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GLfloat m_glDepth;
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union
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{
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FxU32 Scalar;
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#ifdef __ALTIVEC__
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vector unsigned long Vector;
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#endif
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} m_glAlpha;
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// Pixelpipeline
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bool m_bRestoreColorCombine;
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bool m_bRestoreAlphaCombine;
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private:
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union
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{
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FxU16 Scalar;
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#ifdef __ALTIVEC__
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vector bool short Vector;
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#endif
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} m_ChromaKey;
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//#ifdef DEBUG_TILE_RENDERING
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protected:
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static void highlightTileCorners(const Framebuffer::TileUpdateState updateState, FxU32* texbuffer, const GLint x_step, const GLint y_step);
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//#endif
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};
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