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/SkAlphaType.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkColorType.h"
13 #include "include/core/SkImageInfo.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkRect.h"
16 #include "include/core/SkRefCnt.h"
17 #include "include/core/SkSurface.h"
18 #include "include/core/SkTypes.h"
19 #include "include/gpu/GpuTypes.h"
20 #include "include/gpu/ganesh/GrDirectContext.h"
21 #include "include/gpu/ganesh/GrTypes.h"
22 #include "include/gpu/ganesh/SkSurfaceGanesh.h"
23 #include "include/private/base/SkDebug.h"
24 #include "tests/CtsEnforcement.h"
25 #include "tests/Test.h"
26
27 #include <cstdint>
28
29 class GrRecordingContext;
30 struct GrContextOptions;
31
read_pixels(sk_sp<SkSurface> surface,SkColor initColor)32 static SkBitmap read_pixels(sk_sp<SkSurface> surface, SkColor initColor) {
33 SkBitmap bmp;
34 bmp.allocN32Pixels(surface->width(), surface->height());
35 bmp.eraseColor(initColor);
36 if (!surface->readPixels(bmp, 0, 0)) {
37 SkDebugf("readPixels failed\n");
38 }
39 return bmp;
40 }
41
make_surface(GrRecordingContext * rContext)42 static sk_sp<SkSurface> make_surface(GrRecordingContext* rContext) {
43 SkImageInfo info = SkImageInfo::Make(50, 50, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
44 return SkSurfaces::RenderTarget(
45 rContext, skgpu::Budgeted::kNo, info, 4, kBottomLeft_GrSurfaceOrigin, nullptr);
46 }
47
test_bug_6653(GrDirectContext * dContext,skiatest::Reporter * reporter,const char * label)48 static void test_bug_6653(GrDirectContext* dContext,
49 skiatest::Reporter* reporter,
50 const char* label) {
51 SkRect rect = SkRect::MakeWH(50, 50);
52
53 SkPaint paint;
54 paint.setColor(SK_ColorWHITE);
55 paint.setStrokeWidth(5);
56 paint.setStyle(SkPaint::kStroke_Style);
57
58 // The one device that fails this test (Galaxy S6) does so in a flaky fashion. Trying many
59 // times makes it more likely to fail. Also, interacting with the phone (eg swiping between
60 // different home screens) while the test is running makes it fail close to 100%.
61 static const int kNumIterations = 50;
62
63 for (int i = 0; i < kNumIterations; ++i) {
64 auto s0 = make_surface(dContext);
65 if (!s0) {
66 // MSAA may not be supported
67 return;
68 }
69
70 auto s1 = make_surface(dContext);
71 s1->getCanvas()->clear(SK_ColorBLACK);
72 s1->getCanvas()->drawOval(rect, paint);
73 SkBitmap b1 = read_pixels(s1, SK_ColorBLACK);
74 s1 = nullptr;
75
76 // The bug requires that all three of the following surfaces are cleared to the same color
77 auto s2 = make_surface(dContext);
78 s2->getCanvas()->clear(SK_ColorBLUE);
79 SkBitmap b2 = read_pixels(s2, SK_ColorBLACK);
80 s2 = nullptr;
81
82 auto s3 = make_surface(dContext);
83 s3->getCanvas()->clear(SK_ColorBLUE);
84 s0->getCanvas()->drawImage(read_pixels(s3, SK_ColorBLACK).asImage(), 0, 0);
85 s3 = nullptr;
86
87 auto s4 = make_surface(dContext);
88 s4->getCanvas()->clear(SK_ColorBLUE);
89 s4->getCanvas()->drawOval(rect, paint);
90
91 // When this fails, b4 will "succeed", but return an empty bitmap (containing just the
92 // clear color). Regardless, b5 will contain the oval that was just drawn, so diffing the
93 // two bitmaps tests for the failure case. Initialize the bitmaps to different colors so
94 // that if the readPixels doesn't work, this test will always fail.
95 SkBitmap b4 = read_pixels(s4, SK_ColorRED);
96 SkBitmap b5 = read_pixels(s4, SK_ColorGREEN);
97
98 bool match = true;
99 for (int y = 0; y < b4.height() && match; ++y) {
100 for (int x = 0; x < b4.width() && match; ++x) {
101 uint32_t pixelA = *b4.getAddr32(x, y);
102 uint32_t pixelB = *b5.getAddr32(x, y);
103 if (pixelA != pixelB) {
104 match = false;
105 }
106 }
107 }
108
109 REPORTER_ASSERT(reporter, match, "%s", label);
110 }
111 }
112
113 // Tests that readPixels returns up-to-date results. This has failed on several GPUs,
114 // from multiple vendors, in MSAA mode.
DEF_GANESH_TEST_FOR_RENDERING_CONTEXTS(skbug6653,reporter,ctxInfo,CtsEnforcement::kApiLevel_T)115 DEF_GANESH_TEST_FOR_RENDERING_CONTEXTS(skbug6653, reporter, ctxInfo, CtsEnforcement::kApiLevel_T) {
116 auto ctx = ctxInfo.directContext();
117 test_bug_6653(ctx, reporter, "Default");
118 }
119