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1 |
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2 /* |
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3 * Copyright 2006 The Android Open Source Project |
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4 * |
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5 * Use of this source code is governed by a BSD-style license that can be |
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6 * found in the LICENSE file. |
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7 */ |
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8 |
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9 |
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10 #ifndef SkBitmapProcShader_DEFINED |
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11 #define SkBitmapProcShader_DEFINED |
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12 |
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13 #include "SkShader.h" |
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14 #include "SkBitmapProcState.h" |
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15 #include "SkSmallAllocator.h" |
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16 |
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17 class SkBitmapProcShader : public SkShader { |
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18 public: |
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19 SkBitmapProcShader(const SkBitmap& src, TileMode tx, TileMode ty); |
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20 |
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21 // overrides from SkShader |
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22 virtual bool isOpaque() const SK_OVERRIDE; |
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23 virtual bool setContext(const SkBitmap&, const SkPaint&, const SkMatrix&) SK_OVERRIDE; |
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24 virtual void endContext() SK_OVERRIDE; |
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25 virtual uint32_t getFlags() SK_OVERRIDE { return fFlags; } |
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26 virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE; |
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27 virtual ShadeProc asAShadeProc(void** ctx) SK_OVERRIDE; |
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28 virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count) SK_OVERRIDE; |
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29 virtual BitmapType asABitmap(SkBitmap*, SkMatrix*, TileMode*) const SK_OVERRIDE; |
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30 |
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31 static bool CanDo(const SkBitmap&, TileMode tx, TileMode ty); |
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32 |
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33 SK_TO_STRING_OVERRIDE() |
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34 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBitmapProcShader) |
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35 |
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36 #if SK_SUPPORT_GPU |
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37 GrEffectRef* asNewEffect(GrContext*, const SkPaint&) const SK_OVERRIDE; |
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38 #endif |
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39 |
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40 protected: |
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41 SkBitmapProcShader(SkReadBuffer& ); |
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42 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
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43 |
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44 SkBitmap fRawBitmap; // experimental for RLE encoding |
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45 SkBitmapProcState fState; |
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46 uint32_t fFlags; |
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47 |
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48 private: |
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49 typedef SkShader INHERITED; |
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50 }; |
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51 |
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52 // Commonly used allocator. It currently is only used to allocate up to 2 objects. The total |
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53 // bytes requested is calculated using one of our large shaders plus the size of an Sk3DBlitter |
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54 // in SkDraw.cpp |
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55 typedef SkSmallAllocator<2, sizeof(SkBitmapProcShader) + sizeof(void*) * 2> SkTBlitterAllocator; |
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56 |
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57 // If alloc is non-NULL, it will be used to allocate the returned SkShader, and MUST outlive |
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58 // the SkShader. |
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59 SkShader* CreateBitmapShader(const SkBitmap& src, SkShader::TileMode, SkShader::TileMode, |
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60 SkTBlitterAllocator* alloc); |
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61 |
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62 #endif |