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Side by Side Diff: include/gpu/GrPathRendererChain.h

Issue 1407883004: Remove GrPipelineBuilder from getPathRenderer call (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Hide GrContext::drawingManager entry point Created 5 years, 1 month ago
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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 "SkRefCnt.h"
12 #include "SkTArray.h"
13
14 class GrContext;
15 class GrPathRenderer;
16 class GrPipelineBuilder;
17 class GrShaderCaps;
18 class GrStrokeInfo;
19 class SkMatrix;
20 class SkPath;
21
22 /**
23 * Keeps track of an ordered list of path renderers. When a path needs to be
24 * drawn this list is scanned to find the most preferred renderer. To add your
25 * path renderer to the list implement the GrPathRenderer::AddPathRenderers
26 * function.
27 */
28 class GrPathRendererChain : public SkRefCnt {
29 public:
30 // See comments in GrPathRenderer.h
31 enum StencilSupport {
32 kNoSupport_StencilSupport,
33 kStencilOnly_StencilSupport,
34 kNoRestriction_StencilSupport,
35 };
36
37 GrPathRendererChain(GrContext* context);
38
39 ~GrPathRendererChain();
40
41 // takes a ref and unrefs in destructor
42 GrPathRenderer* addPathRenderer(GrPathRenderer* pr);
43
44 /** Documents how the caller plans to use a GrPathRenderer to draw a path. I t affects the PR
45 returned by getPathRenderer */
46 enum DrawType {
47 kColor_DrawType, // draw to the color buffer, no AA
48 kColorAntiAlias_DrawType, // draw to color buffer, with partia l coverage AA
49 kStencilOnly_DrawType, // draw just to the stencil buffer
50 kStencilAndColor_DrawType, // draw the stencil and color buffer , no AA
51 kStencilAndColorAntiAlias_DrawType // draw the stencil and color buffer , with partial
52 // coverage AA.
53 };
54 /** Returns a GrPathRenderer compatible with the request if one is available . If the caller
55 is drawing the path to the stencil buffer then stencilSupport can be use d to determine
56 whether the path can be rendered with arbitrary stencil rules or not. Se e comments on
57 StencilSupport in GrPathRenderer.h. */
58 GrPathRenderer* getPathRenderer(const GrShaderCaps* shaderCaps,
59 const GrPipelineBuilder&,
60 const SkMatrix& viewMatrix,
61 const SkPath& path,
62 const GrStrokeInfo& stroke,
63 DrawType drawType,
64 StencilSupport* stencilSupport);
65
66 private:
67 GrPathRendererChain();
68
69 void init();
70
71 enum {
72 kPreAllocCount = 8,
73 };
74 bool fInit;
75 GrContext* fOwner;
76 SkSTArray<kPreAllocCount, GrPathRenderer*, true> fChain;
77
78 typedef SkRefCnt INHERITED;
79 };
80
81 #endif
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