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
9 #include "src/gpu/GrPathRendererChain.h"
10
11 #include "include/gpu/GrContext.h"
12 #include "include/private/GrRecordingContext.h"
13 #include "src/gpu/GrCaps.h"
14 #include "src/gpu/GrContextPriv.h"
15 #include "src/gpu/GrGpu.h"
16 #include "src/gpu/GrRecordingContextPriv.h"
17 #include "src/gpu/GrShaderCaps.h"
18 #include "src/gpu/ccpr/GrCoverageCountingPathRenderer.h"
19 #include "src/gpu/ops/GrAAConvexPathRenderer.h"
20 #include "src/gpu/ops/GrAAHairLinePathRenderer.h"
21 #include "src/gpu/ops/GrAALinearizingConvexPathRenderer.h"
22 #include "src/gpu/ops/GrDashLinePathRenderer.h"
23 #include "src/gpu/ops/GrDefaultPathRenderer.h"
24 #include "src/gpu/ops/GrSmallPathRenderer.h"
25 #include "src/gpu/ops/GrStencilAndCoverPathRenderer.h"
26 #include "src/gpu/ops/GrTessellatingPathRenderer.h"
27
GrPathRendererChain(GrRecordingContext * context,const Options & options)28 GrPathRendererChain::GrPathRendererChain(GrRecordingContext* context, const Options& options) {
29 const GrCaps& caps = *context->priv().caps();
30 if (options.fGpuPathRenderers & GpuPathRenderers::kDashLine) {
31 fChain.push_back(sk_make_sp<GrDashLinePathRenderer>());
32 }
33 if (options.fGpuPathRenderers & GpuPathRenderers::kAAConvex) {
34 fChain.push_back(sk_make_sp<GrAAConvexPathRenderer>());
35 }
36 if (options.fGpuPathRenderers & GpuPathRenderers::kCoverageCounting) {
37 using AllowCaching = GrCoverageCountingPathRenderer::AllowCaching;
38 if (auto ccpr = GrCoverageCountingPathRenderer::CreateIfSupported(
39 caps, AllowCaching(options.fAllowPathMaskCaching),
40 context->priv().contextID())) {
41 fCoverageCountingPathRenderer = ccpr.get();
42 context->priv().addOnFlushCallbackObject(fCoverageCountingPathRenderer);
43 fChain.push_back(std::move(ccpr));
44 }
45 }
46 if (options.fGpuPathRenderers & GpuPathRenderers::kAAHairline) {
47 fChain.push_back(sk_make_sp<GrAAHairLinePathRenderer>());
48 }
49 if (options.fGpuPathRenderers & GpuPathRenderers::kAALinearizing) {
50 fChain.push_back(sk_make_sp<GrAALinearizingConvexPathRenderer>());
51 }
52 if (options.fGpuPathRenderers & GpuPathRenderers::kSmall) {
53 auto spr = sk_make_sp<GrSmallPathRenderer>();
54 context->priv().addOnFlushCallbackObject(spr.get());
55 fChain.push_back(std::move(spr));
56 }
57 if (options.fGpuPathRenderers & GpuPathRenderers::kStencilAndCover) {
58 auto direct = context->priv().asDirectContext();
59 if (direct) {
60 auto resourceProvider = direct->priv().resourceProvider();
61
62 sk_sp<GrPathRenderer> pr(
63 GrStencilAndCoverPathRenderer::Create(resourceProvider, caps));
64 if (pr) {
65 fChain.push_back(std::move(pr));
66 }
67 }
68 }
69 if (options.fGpuPathRenderers & GpuPathRenderers::kTessellating) {
70 fChain.push_back(sk_make_sp<GrTessellatingPathRenderer>());
71 }
72
73 // We always include the default path renderer (as well as SW), so we can draw any path
74 fChain.push_back(sk_make_sp<GrDefaultPathRenderer>());
75 }
76
getPathRenderer(const GrPathRenderer::CanDrawPathArgs & args,DrawType drawType,GrPathRenderer::StencilSupport * stencilSupport)77 GrPathRenderer* GrPathRendererChain::getPathRenderer(
78 const GrPathRenderer::CanDrawPathArgs& args,
79 DrawType drawType,
80 GrPathRenderer::StencilSupport* stencilSupport) {
81 GR_STATIC_ASSERT(GrPathRenderer::kNoSupport_StencilSupport <
82 GrPathRenderer::kStencilOnly_StencilSupport);
83 GR_STATIC_ASSERT(GrPathRenderer::kStencilOnly_StencilSupport <
84 GrPathRenderer::kNoRestriction_StencilSupport);
85 GrPathRenderer::StencilSupport minStencilSupport;
86 if (DrawType::kStencil == drawType) {
87 minStencilSupport = GrPathRenderer::kStencilOnly_StencilSupport;
88 } else if (DrawType::kStencilAndColor == drawType) {
89 minStencilSupport = GrPathRenderer::kNoRestriction_StencilSupport;
90 } else {
91 minStencilSupport = GrPathRenderer::kNoSupport_StencilSupport;
92 }
93 if (minStencilSupport != GrPathRenderer::kNoSupport_StencilSupport) {
94 // We don't support (and shouldn't need) stenciling of non-fill paths.
95 if (!args.fShape->style().isSimpleFill()) {
96 return nullptr;
97 }
98 }
99
100 GrPathRenderer* bestPathRenderer = nullptr;
101 for (const sk_sp<GrPathRenderer>& pr : fChain) {
102 GrPathRenderer::StencilSupport support = GrPathRenderer::kNoSupport_StencilSupport;
103 if (GrPathRenderer::kNoSupport_StencilSupport != minStencilSupport) {
104 support = pr->getStencilSupport(*args.fShape);
105 if (support < minStencilSupport) {
106 continue;
107 }
108 }
109 GrPathRenderer::CanDrawPath canDrawPath = pr->canDrawPath(args);
110 if (GrPathRenderer::CanDrawPath::kNo == canDrawPath) {
111 continue;
112 }
113 if (GrPathRenderer::CanDrawPath::kAsBackup == canDrawPath && bestPathRenderer) {
114 continue;
115 }
116 if (stencilSupport) {
117 *stencilSupport = support;
118 }
119 bestPathRenderer = pr.get();
120 if (GrPathRenderer::CanDrawPath::kYes == canDrawPath) {
121 break;
122 }
123 }
124 return bestPathRenderer;
125 }
126