1 /*
2 * Copyright 2017 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 #include "include/core/SkBitmap.h"
9 #include "include/core/SkColor.h"
10 #include "include/core/SkColorSpace.h"
11 #include "include/core/SkImageInfo.h"
12 #include "include/core/SkMatrix.h"
13 #include "include/core/SkPath.h"
14 #include "include/core/SkRect.h"
15 #include "include/core/SkRefCnt.h"
16 #include "include/core/SkStrokeRec.h"
17 #include "include/core/SkSurface.h"
18 #include "include/core/SkTypes.h"
19 #include "include/gpu/GrBackendSurface.h"
20 #include "include/gpu/GrContextOptions.h"
21 #include "include/gpu/GrDirectContext.h"
22 #include "include/gpu/GrTypes.h"
23 #include "include/private/GrTypesPriv.h"
24 #include "include/private/SkColorData.h"
25 #include "src/gpu/GrCaps.h"
26 #include "src/gpu/GrDirectContextPriv.h"
27 #include "src/gpu/GrFragmentProcessor.h"
28 #include "src/gpu/GrImageInfo.h"
29 #include "src/gpu/GrPaint.h"
30 #include "src/gpu/GrStyle.h"
31 #include "src/gpu/v1/SurfaceDrawContext_v1.h"
32 #include "tests/Test.h"
33 #include "tools/gpu/GrContextFactory.h"
34
35 #include <utility>
36
only_allow_default(GrContextOptions * options)37 static void only_allow_default(GrContextOptions* options) {
38 options->fGpuPathRenderers = GpuPathRenderers::kNone;
39 }
40
read_back(GrDirectContext * dContext,skgpu::v1::SurfaceDrawContext * sdc,int width,int height)41 static SkBitmap read_back(GrDirectContext* dContext,
42 skgpu::v1::SurfaceDrawContext* sdc,
43 int width, int height) {
44
45 SkImageInfo dstII = SkImageInfo::MakeN32Premul(width, height);
46
47 SkBitmap bm;
48 bm.allocPixels(dstII);
49
50 sdc->readPixels(dContext, bm.pixmap(), {0, 0});
51
52 return bm;
53 }
54
make_path(const SkRect & outer,int inset,SkPathFillType fill)55 static SkPath make_path(const SkRect& outer, int inset, SkPathFillType fill) {
56 SkPath p;
57
58 p.addRect(outer, SkPathDirection::kCW);
59 p.addRect(outer.makeInset(inset, inset), SkPathDirection::kCCW);
60 p.setFillType(fill);
61 return p;
62 }
63
64
65 static const int kBigSize = 64; // This should be a power of 2
66 static const int kPad = 3;
67
68 // From crbug.com/769898:
69 // create an approx fit render target context that will have extra space (i.e., npot)
70 // draw an inverse wound concave path into it - forcing use of the stencil-using path renderer
71 // throw the RTC away so the backing GrSurface/GrStencilBuffer can be reused
72 // create a new render target context that will reuse the prior GrSurface
73 // draw a normally wound concave path that touches outside of the approx fit RTC's content rect
74 //
75 // When the bug manifests the DefaultPathRenderer/GrMSAAPathRenderer is/was leaving the stencil
76 // buffer outside of the first content rect in a bad state and the second draw would be incorrect.
77
run_test(GrDirectContext * dContext,skiatest::Reporter * reporter)78 static void run_test(GrDirectContext* dContext, skiatest::Reporter* reporter) {
79 SkPath invPath = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
80 kBigSize/2-1, SkPathFillType::kInverseWinding);
81 SkPath path = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
82 kPad, SkPathFillType::kWinding);
83
84 GrStyle style(SkStrokeRec::kFill_InitStyle);
85
86 {
87 auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
88 SkBackingFit::kApprox,
89 {kBigSize/2 + 1, kBigSize/2 + 1},
90 SkSurfaceProps());
91
92 sdc->clear(SK_PMColor4fBLACK);
93
94 GrPaint paint;
95
96 const SkPMColor4f color = { 1.0f, 0.0f, 0.0f, 1.0f };
97 auto fp = GrFragmentProcessor::MakeColor(color);
98 paint.setColorFragmentProcessor(std::move(fp));
99
100 sdc->drawPath(nullptr, std::move(paint), GrAA::kNo, SkMatrix::I(), invPath, style);
101
102 dContext->priv().flushSurface(sdc->asSurfaceProxy());
103 }
104
105 {
106 auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
107 SkBackingFit::kExact, {kBigSize, kBigSize},
108 SkSurfaceProps());
109
110 sdc->clear(SK_PMColor4fBLACK);
111
112 GrPaint paint;
113
114 const SkPMColor4f color = { 0.0f, 1.0f, 0.0f, 1.0f };
115 auto fp = GrFragmentProcessor::MakeColor(color);
116 paint.setColorFragmentProcessor(std::move(fp));
117
118 sdc->drawPath(nullptr, std::move(paint), GrAA::kNo,
119 SkMatrix::I(), path, style);
120
121 SkBitmap bm = read_back(dContext, sdc.get(), kBigSize, kBigSize);
122
123 bool correct = true;
124 for (int y = kBigSize/2+1; y < kBigSize-kPad-1 && correct; ++y) {
125 for (int x = kPad+1; x < kBigSize-kPad-1 && correct; ++x) {
126 correct = bm.getColor(x, y) == SK_ColorBLACK;
127 REPORTER_ASSERT(reporter, correct);
128 }
129 }
130 }
131 }
132
DEF_GPUTEST_FOR_CONTEXTS(DefaultPathRendererTest,sk_gpu_test::GrContextFactory::IsRenderingContext,reporter,ctxInfo,only_allow_default)133 DEF_GPUTEST_FOR_CONTEXTS(DefaultPathRendererTest,
134 sk_gpu_test::GrContextFactory::IsRenderingContext,
135 reporter, ctxInfo, only_allow_default) {
136 auto ctx = ctxInfo.directContext();
137
138 run_test(ctx, reporter);
139 }
140