/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkTypes.h"
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#include "SkCanvas.h"
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#include "SkSurface.h"
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#include "GrContext.h"
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#include "GrContextPriv.h"
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#include "Test.h"
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static SkBitmap read_pixels(sk_sp<SkSurface> surface, SkColor initColor) {
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SkBitmap bmp;
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bmp.allocN32Pixels(surface->width(), surface->height());
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bmp.eraseColor(initColor);
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if (!surface->readPixels(bmp, 0, 0)) {
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SkDebugf("readPixels failed\n");
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}
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return bmp;
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}
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static sk_sp<SkSurface> make_surface(GrContext* context) {
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SkImageInfo info = SkImageInfo::Make(50, 50, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
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return SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info, 4,
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kBottomLeft_GrSurfaceOrigin, nullptr);
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}
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static void test_bug_6653(GrContext* ctx, skiatest::Reporter* reporter, const char* label) {
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SkRect rect = SkRect::MakeWH(50, 50);
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SkPaint paint;
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paint.setColor(SK_ColorWHITE);
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paint.setStrokeWidth(5);
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paint.setStyle(SkPaint::kStroke_Style);
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// The one device that fails this test (Galaxy S6) does so in a flaky fashion. Trying many
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// times makes it more likely to fail. Also, interacting with the phone (eg swiping between
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// different home screens) while the test is running makes it fail close to 100%.
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static const int kNumIterations = 50;
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for (int i = 0; i < kNumIterations; ++i) {
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auto s0 = make_surface(ctx);
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if (!s0) {
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// MSAA may not be supported
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return;
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}
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auto s1 = make_surface(ctx);
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s1->getCanvas()->clear(SK_ColorBLACK);
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s1->getCanvas()->drawOval(rect, paint);
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SkBitmap b1 = read_pixels(s1, SK_ColorBLACK);
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s1 = nullptr;
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// The bug requires that all three of the following surfaces are cleared to the same color
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auto s2 = make_surface(ctx);
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s2->getCanvas()->clear(SK_ColorBLUE);
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SkBitmap b2 = read_pixels(s2, SK_ColorBLACK);
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s2 = nullptr;
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auto s3 = make_surface(ctx);
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s3->getCanvas()->clear(SK_ColorBLUE);
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SkBitmap b3 = read_pixels(s3, SK_ColorBLACK);
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s0->getCanvas()->drawBitmap(b3, 0, 0);
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s3 = nullptr;
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auto s4 = make_surface(ctx);
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s4->getCanvas()->clear(SK_ColorBLUE);
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s4->getCanvas()->drawOval(rect, paint);
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// When this fails, b4 will "succeed", but return an empty bitmap (containing just the
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// clear color). Regardless, b5 will contain the oval that was just drawn, so diffing the
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// two bitmaps tests for the failure case. Initialize the bitmaps to different colors so
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// that if the readPixels doesn't work, this test will always fail.
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SkBitmap b4 = read_pixels(s4, SK_ColorRED);
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SkBitmap b5 = read_pixels(s4, SK_ColorGREEN);
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bool match = true;
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for (int y = 0; y < b4.height() && match; ++y) {
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for (int x = 0; x < b4.width() && match; ++x) {
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uint32_t pixelA = *b4.getAddr32(x, y);
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uint32_t pixelB = *b5.getAddr32(x, y);
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if (pixelA != pixelB) {
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match = false;
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}
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}
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}
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REPORTER_ASSERT(reporter, match, label);
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}
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}
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// Tests that readPixels returns up-to-date results. This has failed on several GPUs,
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// from multiple vendors, in MSAA mode.
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(skbug6653, reporter, ctxInfo) {
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GrContext* ctx = ctxInfo.grContext();
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test_bug_6653(ctx, reporter, "Default");
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}
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// Same as above, but without explicit resource allocation.
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(skbug6653_noExplicitResourceAllocation, reporter, ctxInfo) {
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GrContext* ctx = ctxInfo.grContext();
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ctx->flush();
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ctx->priv().resourceProvider()->testingOnly_setExplicitlyAllocateGPUResources(false);
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test_bug_6653(ctx, reporter, "No ERA");
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}
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