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