218c29453f
Bug: skia: Change-Id: Ib18bede613c8d27fd6326f655dc2d638e35870ff Reviewed-on: https://skia-review.googlesource.com/123726 Reviewed-by: Brian Salomon <bsalomon@google.com> Commit-Queue: Chris Dalton <csmartdalton@google.com>
126 lines
4.4 KiB
C++
126 lines
4.4 KiB
C++
/*
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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 "Test.h"
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#include "SkBitmap.h"
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#if SK_SUPPORT_GPU
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#include "GrClip.h"
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#include "GrRenderTargetContext.h"
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#include "GrStyle.h"
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#include "GrTypesPriv.h"
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#include "effects/GrConstColorProcessor.h"
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static void only_allow_default(GrContextOptions* options) {
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options->fGpuPathRenderers = GpuPathRenderers::kNone;
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}
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static SkBitmap read_back(GrRenderTargetContext* rtc, int width, int height) {
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SkImageInfo dstII = SkImageInfo::MakeN32Premul(width, height);
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SkBitmap bm;
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bm.allocPixels(dstII);
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rtc->readPixels(dstII, bm.getAddr(0, 0), bm.rowBytes(), 0, 0, 0);
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return bm;
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}
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static SkPath make_path(const SkRect& outer, int inset, SkPath::FillType fill) {
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SkPath p;
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p.addRect(outer, SkPath::kCW_Direction);
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p.addRect(outer.makeInset(inset, inset), SkPath::kCCW_Direction);
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p.setFillType(fill);
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return p;
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}
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static const int kBigSize = 64; // This should be a power of 2
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static const int kPad = 3;
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// From crbug.com/769898:
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// create an approx fit render target context that will have extra space (i.e., npot)
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// draw an inverse wound concave path into it - forcing use of the stencil-using path renderer
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// throw the RTC away so the backing GrSurface/GrStencilBuffer can be reused
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// create a new render target context that will reuse the prior GrSurface
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// draw a normally wound concave path that touches outside of the approx fit RTC's content rect
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//
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// When the bug manifests the GrDefaultPathRenderer/GrMSAAPathRenderer is/was leaving the stencil
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// buffer outside of the first content rect in a bad state and the second draw would be incorrect.
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static void run_test(GrContext* ctx, skiatest::Reporter* reporter) {
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SkPath invPath = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
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kBigSize/2-1, SkPath::kInverseWinding_FillType);
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SkPath path = make_path(SkRect::MakeXYWH(0, 0, kBigSize, kBigSize),
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kPad, SkPath::kWinding_FillType);
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GrStyle style(SkStrokeRec::kFill_InitStyle);
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{
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auto rtc = ctx->contextPriv().makeDeferredRenderTargetContext(
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SkBackingFit::kApprox,
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kBigSize/2+1, kBigSize/2+1,
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kRGBA_8888_GrPixelConfig, nullptr);
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rtc->clear(nullptr, GrColorPackRGBA(0x0, 0x0, 0x0, 0xFF),
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GrRenderTargetContext::CanClearFullscreen::kYes);
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GrPaint paint;
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const GrColor4f color = { 1.0f, 0.0f, 0.0f, 1.0f };
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auto fp = GrConstColorProcessor::Make(color, GrConstColorProcessor::InputMode::kIgnore);
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paint.addColorFragmentProcessor(std::move(fp));
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rtc->drawPath(GrNoClip(), std::move(paint), GrAA::kNo,
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SkMatrix::I(), invPath, style);
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rtc->prepareForExternalIO(0, nullptr);
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}
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{
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auto rtc = ctx->contextPriv().makeDeferredRenderTargetContext(
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SkBackingFit::kExact, kBigSize, kBigSize,
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kRGBA_8888_GrPixelConfig, nullptr);
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rtc->clear(nullptr, GrColorPackRGBA(0x0, 0x0, 0x0, 0xFF),
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GrRenderTargetContext::CanClearFullscreen::kYes);
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GrPaint paint;
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const GrColor4f color = { 0.0f, 1.0f, 0.0f, 1.0f };
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auto fp = GrConstColorProcessor::Make(color, GrConstColorProcessor::InputMode::kIgnore);
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paint.addColorFragmentProcessor(std::move(fp));
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rtc->drawPath(GrNoClip(), std::move(paint), GrAA::kNo,
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SkMatrix::I(), path, style);
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SkBitmap bm = read_back(rtc.get(), kBigSize, kBigSize);
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bool correct = true;
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for (int y = kBigSize/2+1; y < kBigSize-kPad-1 && correct; ++y) {
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for (int x = kPad+1; x < kBigSize-kPad-1 && correct; ++x) {
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correct = bm.getColor(x, y) == SK_ColorBLACK;
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REPORTER_ASSERT(reporter, correct);
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}
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}
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}
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}
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DEF_GPUTEST_FOR_CONTEXTS(GrDefaultPathRendererTest,
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sk_gpu_test::GrContextFactory::IsRenderingContext,
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reporter, ctxInfo, only_allow_default) {
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GrContext* ctx = ctxInfo.grContext();
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run_test(ctx, reporter);
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}
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#endif
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