1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkCanvasPriv_DEFINED 9 #define SkCanvasPriv_DEFINED 10 11 #include "SkCanvas.h" 12 13 class SkReadBuffer; 14 class SkWriteBuffer; 15 16 class SkAutoCanvasMatrixPaint : SkNoncopyable { 17 public: 18 SkAutoCanvasMatrixPaint(SkCanvas*, const SkMatrix*, const SkPaint*, const SkRect& bounds); 19 ~SkAutoCanvasMatrixPaint(); 20 21 private: 22 SkCanvas* fCanvas; 23 int fSaveCount; 24 }; 25 26 class SkCanvasPriv { 27 public: 28 enum { 29 kDontClipToLayer_SaveLayerFlag = SkCanvas::kDontClipToLayer_PrivateSaveLayerFlag, 30 }; 31 32 // The lattice has pointers directly into the readbuffer 33 static bool ReadLattice(SkReadBuffer&, SkCanvas::Lattice*); 34 35 static void WriteLattice(SkWriteBuffer&, const SkCanvas::Lattice&); 36 37 // return the byte-size of the lattice, even if the buffer is null 38 // storage must be 4-byte aligned 39 static size_t WriteLattice(void* storage, const SkCanvas::Lattice&); 40 41 static SkCanvas::SaveLayerFlags LegacySaveFlagsToSaveLayerFlags(uint32_t legacySaveFlags); 42 SaveBehind(SkCanvas * canvas,const SkRect * subset)43 static int SaveBehind(SkCanvas* canvas, const SkRect* subset) { 44 return canvas->only_axis_aligned_saveBehind(subset); 45 } 46 DrawBehind(SkCanvas * canvas,const SkPaint & paint)47 static void DrawBehind(SkCanvas* canvas, const SkPaint& paint) { 48 canvas->drawClippedToSaveBehind(paint); 49 } 50 51 // The experimental_DrawEdgeAAImageSet API accepts separate dstClips and preViewMatrices arrays, 52 // where entries refer into them, but no explicit size is provided. Given a set of entries, 53 // computes the minimum length for these arrays that would provide index access errors. 54 static void GetDstClipAndMatrixCounts(const SkCanvas::ImageSetEntry set[], int count, 55 int* totalDstClipCount, int* totalMatrixCount); 56 }; 57 58 #endif 59