/*
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* Copyright 2014 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 SkCanvasPriv_DEFINED
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#define SkCanvasPriv_DEFINED
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#include "SkCanvas.h"
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class SkReadBuffer;
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class SkWriteBuffer;
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class SkAutoCanvasMatrixPaint : SkNoncopyable {
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public:
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SkAutoCanvasMatrixPaint(SkCanvas*, const SkMatrix*, const SkPaint*, const SkRect& bounds);
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~SkAutoCanvasMatrixPaint();
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private:
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SkCanvas* fCanvas;
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int fSaveCount;
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};
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class SkCanvasPriv {
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public:
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enum {
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kDontClipToLayer_SaveLayerFlag = SkCanvas::kDontClipToLayer_PrivateSaveLayerFlag,
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};
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// The lattice has pointers directly into the readbuffer
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static bool ReadLattice(SkReadBuffer&, SkCanvas::Lattice*);
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static void WriteLattice(SkWriteBuffer&, const SkCanvas::Lattice&);
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// return the byte-size of the lattice, even if the buffer is null
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// storage must be 4-byte aligned
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static size_t WriteLattice(void* storage, const SkCanvas::Lattice&);
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static SkCanvas::SaveLayerFlags LegacySaveFlagsToSaveLayerFlags(uint32_t legacySaveFlags);
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static int SaveBehind(SkCanvas* canvas, const SkRect* subset) {
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return canvas->only_axis_aligned_saveBehind(subset);
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}
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static void DrawBehind(SkCanvas* canvas, const SkPaint& paint) {
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canvas->drawClippedToSaveBehind(paint);
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}
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// The experimental_DrawEdgeAAImageSet API accepts separate dstClips and preViewMatrices arrays,
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// where entries refer into them, but no explicit size is provided. Given a set of entries,
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// computes the minimum length for these arrays that would provide index access errors.
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static void GetDstClipAndMatrixCounts(const SkCanvas::ImageSetEntry set[], int count,
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int* totalDstClipCount, int* totalMatrixCount);
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};
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#endif
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