/* * Copyright 2017 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "include/core/SkTypes.h" #include "include/core/SkCanvas.h" #include "include/core/SkSurface.h" #include "include/gpu/GrContext.h" #include "src/gpu/GrContextPriv.h" #include "tests/Test.h" static SkBitmap read_pixels(sk_sp surface, SkColor initColor) { SkBitmap bmp; bmp.allocN32Pixels(surface->width(), surface->height()); bmp.eraseColor(initColor); if (!surface->readPixels(bmp, 0, 0)) { SkDebugf("readPixels failed\n"); } return bmp; } static sk_sp make_surface(GrContext* context) { SkImageInfo info = SkImageInfo::Make(50, 50, kRGBA_8888_SkColorType, kPremul_SkAlphaType); return SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info, 4, kBottomLeft_GrSurfaceOrigin, nullptr); } static void test_bug_6653(GrContext* ctx, skiatest::Reporter* reporter, const char* label) { SkRect rect = SkRect::MakeWH(50, 50); SkPaint paint; paint.setColor(SK_ColorWHITE); paint.setStrokeWidth(5); paint.setStyle(SkPaint::kStroke_Style); // The one device that fails this test (Galaxy S6) does so in a flaky fashion. Trying many // times makes it more likely to fail. Also, interacting with the phone (eg swiping between // different home screens) while the test is running makes it fail close to 100%. static const int kNumIterations = 50; for (int i = 0; i < kNumIterations; ++i) { auto s0 = make_surface(ctx); if (!s0) { // MSAA may not be supported return; } auto s1 = make_surface(ctx); s1->getCanvas()->clear(SK_ColorBLACK); s1->getCanvas()->drawOval(rect, paint); SkBitmap b1 = read_pixels(s1, SK_ColorBLACK); s1 = nullptr; // The bug requires that all three of the following surfaces are cleared to the same color auto s2 = make_surface(ctx); s2->getCanvas()->clear(SK_ColorBLUE); SkBitmap b2 = read_pixels(s2, SK_ColorBLACK); s2 = nullptr; auto s3 = make_surface(ctx); s3->getCanvas()->clear(SK_ColorBLUE); SkBitmap b3 = read_pixels(s3, SK_ColorBLACK); s0->getCanvas()->drawBitmap(b3, 0, 0); s3 = nullptr; auto s4 = make_surface(ctx); s4->getCanvas()->clear(SK_ColorBLUE); s4->getCanvas()->drawOval(rect, paint); // When this fails, b4 will "succeed", but return an empty bitmap (containing just the // clear color). Regardless, b5 will contain the oval that was just drawn, so diffing the // two bitmaps tests for the failure case. Initialize the bitmaps to different colors so // that if the readPixels doesn't work, this test will always fail. SkBitmap b4 = read_pixels(s4, SK_ColorRED); SkBitmap b5 = read_pixels(s4, SK_ColorGREEN); bool match = true; for (int y = 0; y < b4.height() && match; ++y) { for (int x = 0; x < b4.width() && match; ++x) { uint32_t pixelA = *b4.getAddr32(x, y); uint32_t pixelB = *b5.getAddr32(x, y); if (pixelA != pixelB) { match = false; } } } REPORTER_ASSERT(reporter, match, label); } } // Tests that readPixels returns up-to-date results. This has failed on several GPUs, // from multiple vendors, in MSAA mode. DEF_GPUTEST_FOR_RENDERING_CONTEXTS(skbug6653, reporter, ctxInfo) { GrContext* ctx = ctxInfo.grContext(); test_bug_6653(ctx, reporter, "Default"); }