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- /*
- * 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<SkSurface> 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<SkSurface> 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");
- }
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