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