SkBitmapProcShader.h revision 7c2f27d788fff9dbf66a6d52753e47f786a313c0 
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
24class SkBitmapProcShader : public SkShader {
25public:
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
47protected:
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
56private:
57    typedef SkShader INHERITED;
58};
59
60#endif
61