1 /* 2 * Copyright 2011 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 GrPathRendererChain_DEFINED 9 #define GrPathRendererChain_DEFINED 10 11 #include "GrPathRenderer.h" 12 13 #include "GrContextOptions.h" 14 #include "SkTypes.h" 15 #include "SkTArray.h" 16 17 class GrContext; 18 19 /** 20 * Keeps track of an ordered list of path renderers. When a path needs to be 21 * drawn this list is scanned to find the most preferred renderer. To add your 22 * path renderer to the list implement the GrPathRenderer::AddPathRenderers 23 * function. 24 */ 25 class GrPathRendererChain : public SkNoncopyable { 26 public: 27 struct Options { 28 using GpuPathRenderers = GrContextOptions::GpuPathRenderers; 29 bool fAllowPathMaskCaching = false; 30 GpuPathRenderers fGpuPathRenderers = GpuPathRenderers::kAll; 31 }; 32 GrPathRendererChain(GrContext* context, const Options&); 33 34 /** Documents how the caller plans to use a GrPathRenderer to draw a path. It affects the PR 35 returned by getPathRenderer */ 36 enum class DrawType { 37 kColor, // draw to the color buffer, no AA 38 kStencil, // draw just to the stencil buffer 39 kStencilAndColor, // draw the stencil and color buffer, no AA 40 }; 41 42 /** Returns a GrPathRenderer compatible with the request if one is available. If the caller 43 is drawing the path to the stencil buffer then stencilSupport can be used to determine 44 whether the path can be rendered with arbitrary stencil rules or not. See comments on 45 StencilSupport in GrPathRenderer.h. */ 46 GrPathRenderer* getPathRenderer(const GrPathRenderer::CanDrawPathArgs& args, 47 DrawType drawType, 48 GrPathRenderer::StencilSupport* stencilSupport); 49 50 private: 51 enum { 52 kPreAllocCount = 8, 53 }; 54 SkSTArray<kPreAllocCount, sk_sp<GrPathRenderer>> fChain; 55 }; 56 57 #endif 58
