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101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkImage_DEFINED
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#define SkImage_DEFINED
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#include "SkRefCnt.h"
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#include "SkScalar.h"
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class SkData;
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class SkCanvas;
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class SkPaint;
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class SkShader;
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class GrContext;
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class GrTexture;
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// need for TileMode
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#include "SkShader.h"
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////// EXPERIMENTAL
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/**
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* SkImage is an abstraction for drawing a rectagle of pixels, though the
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* particular type of image could be actually storing its data on the GPU, or
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* as drawing commands (picture or PDF or otherwise), ready to be played back
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* into another canvas.
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*
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* The content of SkImage is always immutable, though the actual storage may
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* change, if for example that image can be re-created via encoded data or
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* other means.
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*/
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class SkImage : public SkRefCnt {
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public:
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SK_DECLARE_INST_COUNT(SkImage)
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enum ColorType {
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kAlpha_8_ColorType,
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kRGB_565_ColorType,
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kRGBA_8888_ColorType,
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kBGRA_8888_ColorType,
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kPMColor_ColorType,
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kLastEnum_ColorType = kPMColor_ColorType
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};
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enum AlphaType {
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kIgnore_AlphaType,
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kOpaque_AlphaType,
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kPremul_AlphaType,
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kUnpremul_AlphaType,
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kLastEnum_AlphaType = kUnpremul_AlphaType
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};
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struct Info {
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int fWidth;
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int fHeight;
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ColorType fColorType;
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AlphaType fAlphaType;
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};
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static SkImage* NewRasterCopy(const Info&, const void* pixels, size_t rowBytes);
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static SkImage* NewRasterData(const Info&, SkData* pixels, size_t rowBytes);
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static SkImage* NewEncodedData(SkData*);
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static SkImage* NewTexture(GrTexture*);
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int width() const { return fWidth; }
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int height() const { return fHeight; }
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uint32_t uniqueID() const { return fUniqueID; }
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SkShader* newShaderClamp() const;
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SkShader* newShader(SkShader::TileMode, SkShader::TileMode) const;
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void draw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*);
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protected:
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SkImage(int width, int height) :
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fWidth(width),
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fHeight(height),
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fUniqueID(NextUniqueID()) {
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SkASSERT(width >= 0);
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SkASSERT(height >= 0);
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}
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private:
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const int fWidth;
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const int fHeight;
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const uint32_t fUniqueID;
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static uint32_t NextUniqueID();
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typedef SkRefCnt INHERITED;
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};
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#endif
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