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/SkPathTypes.h"
15 #include "include/core/SkRect.h"
16 #include "include/core/SkStrokeRec.h"
17 #include "include/core/SkSurfaceProps.h"
18 #include "include/core/SkTypes.h"
19 #include "include/gpu/GrContextOptions.h"
20 #include "include/gpu/GrDirectContext.h"
21 #include "include/private/SkColorData.h"
22 #include "include/private/gpu/ganesh/GrTypesPriv.h"
23 #include "src/gpu/SkBackingFit.h"
24 #include "src/gpu/ganesh/GrDirectContextPriv.h"
25 #include "src/gpu/ganesh/GrFragmentProcessor.h"
26 #include "src/gpu/ganesh/GrPaint.h"
27 #include "src/gpu/ganesh/GrStyle.h"
28 #include "src/gpu/ganesh/SurfaceDrawContext.h"
29 #include "tests/CtsEnforcement.h"
30 #include "tests/Test.h"
31
32 #include <memory>
33 #include <utility>
34
only_allow_default(GrContextOptions * options)35 static void only_allow_default(GrContextOptions* options) {
36 options->fGpuPathRenderers = GpuPathRenderers::kNone;
37 }
38
read_back(GrDirectContext * dContext,skgpu::v1::SurfaceDrawContext * sdc,int width,int height)39 static SkBitmap read_back(GrDirectContext* dContext,
40 skgpu::v1::SurfaceDrawContext* sdc,
41 int width, int height) {
42
43 SkImageInfo dstII = SkImageInfo::MakeN32Premul(width, height);
44
45 SkBitmap bm;
46 bm.allocPixels(dstII);
47
48 sdc->readPixels(dContext, bm.pixmap(), {0, 0});
49
50 return bm;
51 }
52
make_path(const SkRect & outer,int inset,SkPathFillType fill)53 static SkPath make_path(const SkRect& outer, int inset, SkPathFillType fill) {
54 SkPath p;
55
56 p.addRect(outer, SkPathDirection::kCW);
57 p.addRect(outer.makeInset(inset, inset), SkPathDirection::kCCW);
58 p.setFillType(fill);
59 return p;
60 }
61
62
63 static const int kBigSize = 64; // This should be a power of 2
64 static const int kPad = 3;
65
66 // From crbug.com/769898:
67 // create an approx fit render target context that will have extra space (i.e., npot)
68 // draw an inverse wound concave path into it - forcing use of the stencil-using path renderer
69 // throw the RTC away so the backing GrSurface/GrStencilBuffer can be reused
70 // create a new render target context that will reuse the prior GrSurface
71 // draw a normally wound concave path that touches outside of the approx fit RTC's content rect
72 //
73 // When the bug manifests the DefaultPathRenderer/GrMSAAPathRenderer is/was leaving the stencil
74 // buffer outside of the first content rect in a bad state and the second draw would be incorrect.
75
run_test(GrDirectContext * dContext,skiatest::Reporter * reporter)76 static void run_test(GrDirectContext* dContext, skiatest::Reporter* reporter) {
77 SkPath invPath = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
78 kBigSize/2-1, SkPathFillType::kInverseWinding);
79 SkPath path = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
80 kPad, SkPathFillType::kWinding);
81
82 GrStyle style(SkStrokeRec::kFill_InitStyle);
83
84 {
85 auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
86 SkBackingFit::kApprox,
87 {kBigSize/2 + 1, kBigSize/2 + 1},
88 SkSurfaceProps(), /*label=*/{});
89
90 sdc->clear(SK_PMColor4fBLACK);
91
92 GrPaint paint;
93
94 const SkPMColor4f color = { 1.0f, 0.0f, 0.0f, 1.0f };
95 auto fp = GrFragmentProcessor::MakeColor(color);
96 paint.setColorFragmentProcessor(std::move(fp));
97
98 sdc->drawPath(nullptr, std::move(paint), GrAA::kNo, SkMatrix::I(), invPath, style);
99
100 dContext->priv().flushSurface(sdc->asSurfaceProxy());
101 }
102
103 {
104 auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
105 SkBackingFit::kExact, {kBigSize, kBigSize},
106 SkSurfaceProps(), /*label=*/{});
107
108 sdc->clear(SK_PMColor4fBLACK);
109
110 GrPaint paint;
111
112 const SkPMColor4f color = { 0.0f, 1.0f, 0.0f, 1.0f };
113 auto fp = GrFragmentProcessor::MakeColor(color);
114 paint.setColorFragmentProcessor(std::move(fp));
115
116 sdc->drawPath(nullptr, std::move(paint), GrAA::kNo,
117 SkMatrix::I(), path, style);
118
119 SkBitmap bm = read_back(dContext, sdc.get(), kBigSize, kBigSize);
120
121 bool correct = true;
122 for (int y = kBigSize/2+1; y < kBigSize-kPad-1 && correct; ++y) {
123 for (int x = kPad+1; x < kBigSize-kPad-1 && correct; ++x) {
124 correct = bm.getColor(x, y) == SK_ColorBLACK;
125 REPORTER_ASSERT(reporter, correct);
126 }
127 }
128 }
129 }
130
DEF_GANESH_TEST_FOR_CONTEXTS(DefaultPathRendererTest,sk_gpu_test::GrContextFactory::IsRenderingContext,reporter,ctxInfo,only_allow_default,CtsEnforcement::kApiLevel_T)131 DEF_GANESH_TEST_FOR_CONTEXTS(DefaultPathRendererTest,
132 sk_gpu_test::GrContextFactory::IsRenderingContext,
133 reporter,
134 ctxInfo,
135 only_allow_default,
136 CtsEnforcement::kApiLevel_T) {
137 auto ctx = ctxInfo.directContext();
138
139 run_test(ctx, reporter);
140 }
141