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