3 * Copyright 2006 The Android Open Source Project
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
10 #ifndef SkBitmapProcShader_DEFINED
11 #define SkBitmapProcShader_DEFINED
14 #include "SkBitmapProcState.h"
15 #include "SkSmallAllocator.h"
17 class SkBitmapProcShader : public SkShader {
19 SkBitmapProcShader(const SkBitmap& src, TileMode tx, TileMode ty,
20 const SkMatrix* localMatrix = NULL);
22 // overrides from SkShader
23 virtual bool isOpaque() const SK_OVERRIDE;
24 virtual BitmapType asABitmap(SkBitmap*, SkMatrix*, TileMode*) const SK_OVERRIDE;
26 virtual size_t contextSize() const SK_OVERRIDE;
28 static bool CanDo(const SkBitmap&, TileMode tx, TileMode ty);
30 SK_TO_STRING_OVERRIDE()
31 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBitmapProcShader)
34 GrEffectRef* asNewEffect(GrContext*, const SkPaint&) const SK_OVERRIDE;
37 class BitmapProcShaderContext : public SkShader::Context {
39 // The context takes ownership of the state. It will call its destructor
40 // but will NOT free the memory.
41 BitmapProcShaderContext(const SkBitmapProcShader&, const ContextRec&, SkBitmapProcState*);
42 virtual ~BitmapProcShaderContext();
44 virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE;
45 virtual ShadeProc asAShadeProc(void** ctx) SK_OVERRIDE;
46 virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count) SK_OVERRIDE;
48 virtual uint32_t getFlags() const SK_OVERRIDE { return fFlags; }
51 SkBitmapProcState* fState;
54 typedef SkShader::Context INHERITED;
58 SkBitmapProcShader(SkReadBuffer& );
59 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
60 virtual Context* onCreateContext(const ContextRec&, void* storage) const SK_OVERRIDE;
62 SkBitmap fRawBitmap; // experimental for RLE encoding
63 uint8_t fTileModeX, fTileModeY;
66 typedef SkShader INHERITED;
69 // Commonly used allocator. It currently is only used to allocate up to 3 objects. The total
70 // bytes requested is calculated using one of our large shaders, its context size plus the size of
71 // an Sk3DBlitter in SkDraw.cpp
72 // Note that some contexts may contain other contexts (e.g. for compose shaders), but we've not
73 // yet found a situation where the size below isn't big enough.
74 typedef SkSmallAllocator<3, 768> SkTBlitterAllocator;
76 // If alloc is non-NULL, it will be used to allocate the returned SkShader, and MUST outlive
78 SkShader* CreateBitmapShader(const SkBitmap& src, SkShader::TileMode, SkShader::TileMode,
79 const SkMatrix* localMatrix, SkTBlitterAllocator* alloc);