1 2 /* 3 * Copyright 2007 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SkBitmapProcState_DEFINED 11 #define SkBitmapProcState_DEFINED 12 13 #include "SkBitmap.h" 14 #include "SkMatrix.h" 15 16 class SkPaint; 17 18 struct SkBitmapProcState { 19 20 typedef void (*ShaderProc32)(const SkBitmapProcState&, int x, int y, 21 SkPMColor[], int count); 22 23 typedef void (*ShaderProc16)(const SkBitmapProcState&, int x, int y, 24 uint16_t[], int count); 25 26 typedef void (*MatrixProc)(const SkBitmapProcState&, 27 uint32_t bitmapXY[], 28 int count, 29 int x, int y); 30 31 typedef void (*SampleProc32)(const SkBitmapProcState&, 32 const uint32_t[], 33 int count, 34 SkPMColor colors[]); 35 36 typedef void (*SampleProc16)(const SkBitmapProcState&, 37 const uint32_t[], 38 int count, 39 uint16_t colors[]); 40 41 typedef U16CPU (*FixedTileProc)(SkFixed); // returns 0..0xFFFF 42 typedef U16CPU (*IntTileProc)(int value, int count); // returns 0..count-1 43 44 // If a shader proc is present, then the corresponding matrix/sample procs 45 // are ignored 46 ShaderProc32 fShaderProc32; // chooseProcs 47 ShaderProc16 fShaderProc16; // chooseProcs 48 // These are used if the shaderproc is NULL 49 MatrixProc fMatrixProc; // chooseProcs 50 SampleProc32 fSampleProc32; // chooseProcs 51 SampleProc16 fSampleProc16; // chooseProcs 52 53 const SkBitmap* fBitmap; // chooseProcs - orig or mip 54 const SkMatrix* fInvMatrix; // chooseProcs 55 SkMatrix::MapXYProc fInvProc; // chooseProcs 56 57 FixedTileProc fTileProcX; // chooseProcs 58 FixedTileProc fTileProcY; // chooseProcs 59 IntTileProc fIntTileProcY; // chooseProcs 60 SkFixed fFilterOneX; 61 SkFixed fFilterOneY; 62 63 SkPMColor fPaintPMColor; // chooseProcs - A8 config 64 SkFixed fInvSx; // chooseProcs 65 SkFixed fInvKy; // chooseProcs 66 uint16_t fAlphaScale; // chooseProcs 67 uint8_t fInvType; // chooseProcs 68 uint8_t fTileModeX; // CONSTRUCTOR 69 uint8_t fTileModeY; // CONSTRUCTOR 70 SkBool8 fDoFilter; // chooseProcs 71 72 /** Platforms implement this, and can optionally overwrite only the 73 following fields: 74 75 fShaderProc32 76 fShaderProc16 77 fMatrixProc 78 fSampleProc32 79 fSampleProc32 80 81 They will already have valid function pointers, so a platform that does 82 not have an accelerated version can just leave that field as is. A valid 83 implementation can do nothing (see SkBitmapProcState_opts_none.cpp) 84 */ 85 void platformProcs(); 86 87 /** Given the byte size of the index buffer to be passed to the matrix proc, 88 return the maximum number of resulting pixels that can be computed 89 (i.e. the number of SkPMColor values to be written by the sample proc). 90 This routine takes into account that filtering and scale-vs-affine 91 affect the amount of buffer space needed. 92 93 Only valid to call after chooseProcs (setContext) has been called. It is 94 safe to call this inside the shader's shadeSpan() method. 95 */ 96 int maxCountForBufferSize(size_t bufferSize) const; 97 98 private: 99 friend class SkBitmapProcShader; 100 101 SkMatrix fUnitInvMatrix; // chooseProcs 102 SkBitmap fOrigBitmap; // CONSTRUCTOR 103 SkBitmap fMipBitmap; 104 105 MatrixProc chooseMatrixProc(bool trivial_matrix); 106 bool chooseProcs(const SkMatrix& inv, const SkPaint&); 107 }; 108 109 /* Macros for packing and unpacking pairs of 16bit values in a 32bit uint. 110 Used to allow access to a stream of uint16_t either one at a time, or 111 2 at a time by unpacking a uint32_t 112 */ 113 #ifdef SK_CPU_BENDIAN 114 #define PACK_TWO_SHORTS(pri, sec) ((pri) << 16 | (sec)) 115 #define UNPACK_PRIMARY_SHORT(packed) ((uint32_t)(packed) >> 16) 116 #define UNPACK_SECONDARY_SHORT(packed) ((packed) & 0xFFFF) 117 #else 118 #define PACK_TWO_SHORTS(pri, sec) ((pri) | ((sec) << 16)) 119 #define UNPACK_PRIMARY_SHORT(packed) ((packed) & 0xFFFF) 120 #define UNPACK_SECONDARY_SHORT(packed) ((uint32_t)(packed) >> 16) 121 #endif 122 123 #ifdef SK_DEBUG 124 static inline uint32_t pack_two_shorts(U16CPU pri, U16CPU sec) { 125 SkASSERT((uint16_t)pri == pri); 126 SkASSERT((uint16_t)sec == sec); 127 return PACK_TWO_SHORTS(pri, sec); 128 } 129 #else 130 #define pack_two_shorts(pri, sec) PACK_TWO_SHORTS(pri, sec) 131 #endif 132 133 // These functions are generated via macros, but are exposed here so that 134 // platformProcs may test for them by name. 135 void S32_opaque_D32_filter_DX(const SkBitmapProcState& s, const uint32_t xy[], 136 int count, SkPMColor colors[]); 137 void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, const uint32_t xy[], 138 int count, SkPMColor colors[]); 139 void ClampX_ClampY_filter_scale(const SkBitmapProcState& s, uint32_t xy[], 140 int count, int x, int y); 141 void ClampX_ClampY_nofilter_scale(const SkBitmapProcState& s, uint32_t xy[], 142 int count, int x, int y); 143 void ClampX_ClampY_filter_affine(const SkBitmapProcState& s, 144 uint32_t xy[], int count, int x, int y); 145 void ClampX_ClampY_nofilter_affine(const SkBitmapProcState& s, 146 uint32_t xy[], int count, int x, int y); 147 148 #endif 149
