mirror of https://github.com/axmolengine/axmol.git
148 lines
5.8 KiB
C++
148 lines
5.8 KiB
C++
/*
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** Copyright 2007, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef SkBitmapProcState_DEFINED
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#define SkBitmapProcState_DEFINED
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#include "SkBitmap.h"
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#include "SkMatrix.h"
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class SkPaint;
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struct SkBitmapProcState {
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typedef void (*ShaderProc32)(const SkBitmapProcState&, int x, int y,
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SkPMColor[], int count);
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typedef void (*ShaderProc16)(const SkBitmapProcState&, int x, int y,
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uint16_t[], int count);
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typedef void (*MatrixProc)(const SkBitmapProcState&,
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uint32_t bitmapXY[],
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int count,
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int x, int y);
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typedef void (*SampleProc32)(const SkBitmapProcState&,
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const uint32_t[],
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int count,
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SkPMColor colors[]);
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typedef void (*SampleProc16)(const SkBitmapProcState&,
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const uint32_t[],
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int count,
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uint16_t colors[]);
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typedef U16CPU (*FixedTileProc)(SkFixed); // returns 0..0xFFFF
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typedef U16CPU (*IntTileProc)(int value, int count); // returns 0..count-1
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// If a shader proc is present, then the corresponding matrix/sample procs
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// are ignored
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ShaderProc32 fShaderProc32; // chooseProcs
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ShaderProc16 fShaderProc16; // chooseProcs
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// These are used if the shaderproc is NULL
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MatrixProc fMatrixProc; // chooseProcs
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SampleProc32 fSampleProc32; // chooseProcs
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SampleProc16 fSampleProc16; // chooseProcs
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const SkBitmap* fBitmap; // chooseProcs - orig or mip
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const SkMatrix* fInvMatrix; // chooseProcs
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SkMatrix::MapXYProc fInvProc; // chooseProcs
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FixedTileProc fTileProcX; // chooseProcs
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FixedTileProc fTileProcY; // chooseProcs
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IntTileProc fIntTileProcY; // chooseProcs
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SkFixed fFilterOneX;
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SkFixed fFilterOneY;
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SkPMColor fPaintPMColor; // chooseProcs - A8 config
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SkFixed fInvSx; // chooseProcs
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SkFixed fInvKy; // chooseProcs
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uint16_t fAlphaScale; // chooseProcs
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uint8_t fInvType; // chooseProcs
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uint8_t fTileModeX; // CONSTRUCTOR
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uint8_t fTileModeY; // CONSTRUCTOR
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SkBool8 fDoFilter; // chooseProcs
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/** Platforms implement this, and can optionally overwrite only the
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following fields:
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fShaderProc32
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fShaderProc16
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fMatrixProc
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fSampleProc32
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fSampleProc32
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They will already have valid function pointers, so a platform that does
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not have an accelerated version can just leave that field as is. A valid
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implementation can do nothing (see SkBitmapProcState_opts_none.cpp)
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*/
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void platformProcs();
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/** Given the byte size of the index buffer to be passed to the matrix proc,
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return the maximum number of resulting pixels that can be computed
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(i.e. the number of SkPMColor values to be written by the sample proc).
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This routine takes into account that filtering and scale-vs-affine
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affect the amount of buffer space needed.
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Only valid to call after chooseProcs (setContext) has been called. It is
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safe to call this inside the shader's shadeSpan() method.
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*/
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int maxCountForBufferSize(size_t bufferSize) const;
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private:
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friend class SkBitmapProcShader;
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SkMatrix fUnitInvMatrix; // chooseProcs
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SkBitmap fOrigBitmap; // CONSTRUCTOR
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SkBitmap fMipBitmap;
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MatrixProc chooseMatrixProc(bool trivial_matrix);
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bool chooseProcs(const SkMatrix& inv, const SkPaint&);
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};
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/* Macros for packing and unpacking pairs of 16bit values in a 32bit uint.
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Used to allow access to a stream of uint16_t either one at a time, or
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2 at a time by unpacking a uint32_t
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*/
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#ifdef SK_CPU_BENDIAN
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#define PACK_TWO_SHORTS(pri, sec) ((pri) << 16 | (sec))
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#define UNPACK_PRIMARY_SHORT(packed) ((uint32_t)(packed) >> 16)
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#define UNPACK_SECONDARY_SHORT(packed) ((packed) & 0xFFFF)
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#else
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#define PACK_TWO_SHORTS(pri, sec) ((pri) | ((sec) << 16))
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#define UNPACK_PRIMARY_SHORT(packed) ((packed) & 0xFFFF)
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#define UNPACK_SECONDARY_SHORT(packed) ((uint32_t)(packed) >> 16)
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#endif
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#ifdef SK_DEBUG
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static inline uint32_t pack_two_shorts(U16CPU pri, U16CPU sec) {
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SkASSERT((uint16_t)pri == pri);
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SkASSERT((uint16_t)sec == sec);
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return PACK_TWO_SHORTS(pri, sec);
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}
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#else
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#define pack_two_shorts(pri, sec) PACK_TWO_SHORTS(pri, sec)
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#endif
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// These functions are generated via macros, but are exposed here so that
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// platformProcs may test for them by name.
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void S32_opaque_D32_filter_DX(const SkBitmapProcState& s, const uint32_t xy[],
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int count, SkPMColor colors[]);
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void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, const uint32_t xy[],
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int count, SkPMColor colors[]);
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#endif
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