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/GrContext.h"
21 #include "include/gpu/GrContextOptions.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/GrClip.h"
27 #include "src/gpu/GrContextPriv.h"
28 #include "src/gpu/GrFragmentProcessor.h"
29 #include "src/gpu/GrPaint.h"
30 #include "src/gpu/GrRenderTargetContext.h"
31 #include "src/gpu/GrStyle.h"
32 #include "src/gpu/effects/generated/GrConstColorProcessor.h"
33 #include "tests/Test.h"
34 #include "tools/gpu/GrContextFactory.h"
35
36 #include <utility>
37
only_allow_default(GrContextOptions * options)38 static void only_allow_default(GrContextOptions* options) {
39 options->fGpuPathRenderers = GpuPathRenderers::kNone;
40 }
41
read_back(GrRenderTargetContext * rtc,int width,int height)42 static SkBitmap read_back(GrRenderTargetContext* rtc, int width, int height) {
43
44 SkImageInfo dstII = SkImageInfo::MakeN32Premul(width, height);
45
46 SkBitmap bm;
47 bm.allocPixels(dstII);
48
49 rtc->readPixels(dstII, bm.getAddr(0, 0), bm.rowBytes(), {0, 0});
50
51 return bm;
52 }
53
make_path(const SkRect & outer,int inset,SkPath::FillType fill)54 static SkPath make_path(const SkRect& outer, int inset, SkPath::FillType fill) {
55 SkPath p;
56
57 p.addRect(outer, SkPath::kCW_Direction);
58 p.addRect(outer.makeInset(inset, inset), SkPath::kCCW_Direction);
59 p.setFillType(fill);
60 return p;
61 }
62
63
64 static const int kBigSize = 64; // This should be a power of 2
65 static const int kPad = 3;
66
67 // From crbug.com/769898:
68 // create an approx fit render target context that will have extra space (i.e., npot)
69 // draw an inverse wound concave path into it - forcing use of the stencil-using path renderer
70 // throw the RTC away so the backing GrSurface/GrStencilBuffer can be reused
71 // create a new render target context that will reuse the prior GrSurface
72 // draw a normally wound concave path that touches outside of the approx fit RTC's content rect
73 //
74 // When the bug manifests the GrDefaultPathRenderer/GrMSAAPathRenderer is/was leaving the stencil
75 // buffer outside of the first content rect in a bad state and the second draw would be incorrect.
76
run_test(GrContext * ctx,skiatest::Reporter * reporter)77 static void run_test(GrContext* ctx, skiatest::Reporter* reporter) {
78 SkPath invPath = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
79 kBigSize/2-1, SkPath::kInverseWinding_FillType);
80 SkPath path = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
81 kPad, SkPath::kWinding_FillType);
82
83 GrStyle style(SkStrokeRec::kFill_InitStyle);
84
85 {
86 auto rtc = ctx->priv().makeDeferredRenderTargetContext(
87 SkBackingFit::kApprox, kBigSize/2 + 1, kBigSize/2 + 1,
88 GrColorType::kRGBA_8888, nullptr);
89
90 rtc->clear(nullptr, { 0, 0, 0, 1 }, GrRenderTargetContext::CanClearFullscreen::kYes);
91
92 GrPaint paint;
93
94 const SkPMColor4f color = { 1.0f, 0.0f, 0.0f, 1.0f };
95 auto fp = GrConstColorProcessor::Make(color, GrConstColorProcessor::InputMode::kIgnore);
96 paint.addColorFragmentProcessor(std::move(fp));
97
98 rtc->drawPath(GrNoClip(), std::move(paint), GrAA::kNo,
99 SkMatrix::I(), invPath, style);
100
101 rtc->flush(SkSurface::BackendSurfaceAccess::kNoAccess, GrFlushInfo());
102 }
103
104 {
105 auto rtc = ctx->priv().makeDeferredRenderTargetContext(
106 SkBackingFit::kExact, kBigSize, kBigSize, GrColorType::kRGBA_8888, nullptr);
107
108 rtc->clear(nullptr, { 0, 0, 0, 1 }, GrRenderTargetContext::CanClearFullscreen::kYes);
109
110 GrPaint paint;
111
112 const SkPMColor4f color = { 0.0f, 1.0f, 0.0f, 1.0f };
113 auto fp = GrConstColorProcessor::Make(color, GrConstColorProcessor::InputMode::kIgnore);
114 paint.addColorFragmentProcessor(std::move(fp));
115
116 rtc->drawPath(GrNoClip(), std::move(paint), GrAA::kNo,
117 SkMatrix::I(), path, style);
118
119 SkBitmap bm = read_back(rtc.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 }
131
DEF_GPUTEST_FOR_CONTEXTS(GrDefaultPathRendererTest,sk_gpu_test::GrContextFactory::IsRenderingContext,reporter,ctxInfo,only_allow_default)132 DEF_GPUTEST_FOR_CONTEXTS(GrDefaultPathRendererTest,
133 sk_gpu_test::GrContextFactory::IsRenderingContext,
134 reporter, ctxInfo, only_allow_default) {
135 GrContext* ctx = ctxInfo.grContext();
136
137 run_test(ctx, reporter);
138 }
139