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 "include/core/SkCanvas.h" 12 #include "include/private/SkNoncopyable.h" 13 14 class SkReadBuffer; 15 class SkWriteBuffer; 16 17 class SkAutoCanvasMatrixPaint : SkNoncopyable { 18 public: 19 SkAutoCanvasMatrixPaint(SkCanvas*, const SkMatrix*, const SkPaint*, const SkRect& bounds); 20 ~SkAutoCanvasMatrixPaint(); 21 22 private: 23 SkCanvas* fCanvas; 24 int fSaveCount; 25 }; 26 27 class SkCanvasPriv { 28 public: 29 // The lattice has pointers directly into the readbuffer 30 static bool ReadLattice(SkReadBuffer&, SkCanvas::Lattice*); 31 32 static void WriteLattice(SkWriteBuffer&, const SkCanvas::Lattice&); 33 34 // return the byte-size of the lattice, even if the buffer is null 35 // storage must be 4-byte aligned 36 static size_t WriteLattice(void* storage, const SkCanvas::Lattice&); 37 SaveBehind(SkCanvas * canvas,const SkRect * subset)38 static int SaveBehind(SkCanvas* canvas, const SkRect* subset) { 39 return canvas->only_axis_aligned_saveBehind(subset); 40 } DrawBehind(SkCanvas * canvas,const SkPaint & paint)41 static void DrawBehind(SkCanvas* canvas, const SkPaint& paint) { 42 canvas->drawClippedToSaveBehind(paint); 43 } 44 45 // Exposed for testing on non-Android framework builds ReplaceClip(SkCanvas * canvas,const SkIRect & rect)46 static void ReplaceClip(SkCanvas* canvas, const SkIRect& rect) { 47 canvas->androidFramework_replaceClip(rect); 48 } 49 TopDeviceSurfaceDrawContext(SkCanvas * canvas)50 static GrSurfaceDrawContext* TopDeviceSurfaceDrawContext(SkCanvas* canvas) { 51 return canvas->topDeviceSurfaceDrawContext(); 52 } 53 54 // The experimental_DrawEdgeAAImageSet API accepts separate dstClips and preViewMatrices arrays, 55 // where entries refer into them, but no explicit size is provided. Given a set of entries, 56 // computes the minimum length for these arrays that would provide index access errors. 57 static void GetDstClipAndMatrixCounts(const SkCanvas::ImageSetEntry set[], int count, 58 int* totalDstClipCount, int* totalMatrixCount); 59 60 // Checks that the marker name is an identifier ([a-zA-Z][a-zA-Z0-9_]*) 61 // Identifiers with leading underscores are reserved (not allowed). 62 static bool ValidateMarker(const char*); 63 }; 64 65 /** 66 * This constant is trying to balance the speed of ref'ing a subpicture into a parent picture, 67 * against the playback cost of recursing into the subpicture to get at its actual ops. 68 * 69 * For now we pick a conservatively small value, though measurement (and other heuristics like 70 * the type of ops contained) may justify changing this value. 71 */ 72 constexpr int kMaxPictureOpsToUnrollInsteadOfRef = 1; 73 74 #endif 75