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* Copyright 2019 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/SkSurface.h"
#include "include/effects/SkImageFilters.h"
#include "src/gpu/GrContextPriv.h"
#include "tests/Test.h"
// This is the repro of a CastOS memory regression bug (b/138674523).
// The test simply keeps calling SkImage::makeWithFilter (with a blur image filter) while
// shrinking the clip.
// When explicit resource allocation was enabled the last (re-expanded) image in the
// blur creation process became exact.
// This meant that its backing texture could no longer be reused.
// In CastOS' case (and, presumably, Linux desktop) they were only using Ganesh for
// 2D canvas and compositor image filtering. In this case Chrome doesn't regularly purge
// the cache. This would result in Ganesh quickly running up to its max cache limit.
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RepeatedClippedBlurTest, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
GrResourceCache* cache = context->priv().getResourceCache();
const SkImageInfo ii = SkImageInfo::Make(1024, 600, kRGBA_8888_SkColorType,
sk_sp<SkSurface> dst(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, ii));
if (!dst) {
ERRORF(reporter, "Could not create surfaces for repeated clipped blur test.");
SkCanvas* dstCanvas = dst->getCanvas();
sk_sp<SkImage> bigImg;
// Create the initial big image (this corresponds to the album artwork - which is larger
// than the screen)
SkImageInfo srcImageII = SkImageInfo::Make(1280, 1280, kRGBA_8888_SkColorType,
// Make a red ring around a field of green. When rendered the blurred red ring
// should still be visible on all sides of the dest image.
SkBitmap bm;
bm.eraseArea(SkIRect::MakeXYWH(1, 2, 1277, 1274), SK_ColorGREEN);
sk_sp<SkImage> rasterImg = SkImage::MakeFromBitmap(bm);
bigImg = rasterImg->makeTextureImage(context);
sk_sp<SkImage> smImg;
// Shrink the album artwork down to the screen's size
SkImageInfo screenII = SkImageInfo::Make(1024, 600, kRGBA_8888_SkColorType,
sk_sp<SkSurface> s = SkSurface::MakeRenderTarget(context, SkBudgeted::kYes,
screenII, 1, kTopLeft_GrSurfaceOrigin,
SkCanvas* c = s->getCanvas();
c->drawImageRect(bigImg, SkRect::MakeWH(1024, 600), nullptr);
smImg = s->makeImageSnapshot();
// flush here just to clear the playing field
size_t beforeBytes = cache->getResourceBytes();
// Now draw the screen-sized image, blurred, multiple times with a shrinking clip.
// This simulates the swipe away where the screen-sized album artwork is moved off
// screen.
// Note that the blur has to big enough to kick the blur code into the decimate then
// re-expand case.
const SkIRect subset = SkIRect::MakeWH(1024, 600);
SkIRect clip = SkIRect::MakeWH(1024, 600);
for (int i = 0; i < 30; ++i) {
sk_sp<SkImageFilter> blur = SkImageFilters::Blur(20, 20, nullptr);
SkIRect outSubset;
SkIPoint offset;
sk_sp<SkImage> filteredImg = smImg->makeWithFilter(context, blur.get(), subset, clip,
&outSubset, &offset);
SkRect dstRect = SkRect::MakeXYWH(offset.fX, offset.fY,
outSubset.width(), outSubset.height());
dstCanvas->drawImageRect(filteredImg, outSubset, dstRect, nullptr);
// Flush here to mimic Chrome's SkiaHelper::ApplyImageFilter
clip.fRight -= 16;
size_t afterBytes = cache->getResourceBytes();
// When the bug manifests the resource cache will accumulate ~80MB. If texture recycling
// is working as expected the cache size will level off at ~20MB.
REPORTER_ASSERT(reporter, afterBytes < beforeBytes + 20000000);