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      1 /* libs/graphics/sgl/SkBitmapShader.h
      2 **
      3 ** Copyright 2006, The Android Open Source Project
      4 **
      5 ** Licensed under the Apache License, Version 2.0 (the "License");
      6 ** you may not use this file except in compliance with the License.
      7 ** You may obtain a copy of the License at
      8 **
      9 **     http://www.apache.org/licenses/LICENSE-2.0
     10 **
     11 ** Unless required by applicable law or agreed to in writing, software
     12 ** distributed under the License is distributed on an "AS IS" BASIS,
     13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14 ** See the License for the specific language governing permissions and
     15 ** limitations under the License.
     16 */
     17 
     18 #ifndef SkBitmapProcShader_DEFINED
     19 #define SkBitmapProcShader_DEFINED
     20 
     21 #include "SkShader.h"
     22 #include "SkBitmapProcState.h"
     23 
     24 class SkBitmapProcShader : public SkShader {
     25 public:
     26     SkBitmapProcShader(const SkBitmap& src, TileMode tx, TileMode ty);
     27 
     28     // overrides from SkShader
     29     virtual bool setContext(const SkBitmap&, const SkPaint&, const SkMatrix&);
     30     virtual uint32_t getFlags() { return fFlags; }
     31     virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count);
     32     virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count);
     33     virtual void beginSession();
     34     virtual void endSession();
     35     virtual BitmapType asABitmap(SkBitmap*, SkMatrix*, TileMode*,
     36                                  SkScalar* twoPointRadialParams) const;
     37 
     38     static bool CanDo(const SkBitmap&, TileMode tx, TileMode ty);
     39 
     40     static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
     41         return SkNEW_ARGS(SkBitmapProcShader, (buffer));
     42     }
     43 
     44     // override from flattenable
     45     virtual bool toDumpString(SkString* str) const;
     46 
     47 protected:
     48     SkBitmapProcShader(SkFlattenableReadBuffer& );
     49     virtual void flatten(SkFlattenableWriteBuffer& );
     50     virtual Factory getFactory() { return CreateProc; }
     51 
     52     SkBitmap          fRawBitmap;   // experimental for RLE encoding
     53     SkBitmapProcState fState;
     54     uint32_t          fFlags;
     55 
     56 private:
     57     typedef SkShader INHERITED;
     58 };
     59 
     60 #endif
     61