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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
#include "SkBitmapCache.h"
#include "SkCanvas.h"
#include "SkDiscardableMemoryPool.h"
#include "SkGraphics.h"
#include "SkMipMap.h"
#include "SkPicture.h"
#include "SkPictureRecorder.h"
#include "SkResourceCache.h"
#include "SkSurface.h"
////////////////////////////////////////////////////////////////////////////////////////
enum LockedState {
kNotLocked,
kLocked,
};
enum CachedState {
kNotInCache,
kInCache,
};
static void check_data(skiatest::Reporter* reporter, const SkCachedData* data,
int refcnt, CachedState cacheState, LockedState lockedState) {
REPORTER_ASSERT(reporter, data->testing_only_getRefCnt() == refcnt);
REPORTER_ASSERT(reporter, data->testing_only_isInCache() == (kInCache == cacheState));
bool isLocked = (data->data() != nullptr);
REPORTER_ASSERT(reporter, isLocked == (lockedState == kLocked));
}
static void test_mipmapcache(skiatest::Reporter* reporter, SkResourceCache* cache) {
cache->purgeAll();
SkBitmap src;
src.allocN32Pixels(5, 5);
src.setImmutable();
const SkDestinationSurfaceColorMode colorMode = SkDestinationSurfaceColorMode::kLegacy;
const SkMipMap* mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src), colorMode,
cache);
REPORTER_ASSERT(reporter, nullptr == mipmap);
mipmap = SkMipMapCache::AddAndRef(src, colorMode, cache);
REPORTER_ASSERT(reporter, mipmap);
{
const SkMipMap* mm = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src), colorMode,
cache);
REPORTER_ASSERT(reporter, mm);
REPORTER_ASSERT(reporter, mm == mipmap);
mm->unref();
}
check_data(reporter, mipmap, 2, kInCache, kLocked);
mipmap->unref();
// tricky, since technically after this I'm no longer an owner, but since the cache is
// local, I know it won't get purged behind my back
check_data(reporter, mipmap, 1, kInCache, kNotLocked);
// find us again
mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src), colorMode, cache);
check_data(reporter, mipmap, 2, kInCache, kLocked);
cache->purgeAll();
check_data(reporter, mipmap, 1, kNotInCache, kLocked);
mipmap->unref();
}
static void test_mipmap_notify(skiatest::Reporter* reporter, SkResourceCache* cache) {
const SkDestinationSurfaceColorMode colorMode = SkDestinationSurfaceColorMode::kLegacy;
const int N = 3;
SkBitmap src[N];
for (int i = 0; i < N; ++i) {
src[i].allocN32Pixels(5, 5);
src[i].setImmutable();
SkMipMapCache::AddAndRef(src[i], colorMode, cache)->unref();
}
for (int i = 0; i < N; ++i) {
const SkMipMap* mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src[i]),
colorMode, cache);
if (cache) {
// if cache is null, we're working on the global cache, and other threads might purge
// it, making this check fragile.
REPORTER_ASSERT(reporter, mipmap);
}
SkSafeUnref(mipmap);
src[i].reset(); // delete the underlying pixelref, which *should* remove us from the cache
mipmap = SkMipMapCache::FindAndRef(SkBitmapCacheDesc::Make(src[i]), colorMode, cache);
REPORTER_ASSERT(reporter, !mipmap);
}
}
#include "SkDiscardableMemoryPool.h"
static SkDiscardableMemoryPool* gPool = 0;
static SkDiscardableMemory* pool_factory(size_t bytes) {
SkASSERT(gPool);
return gPool->create(bytes);
}
static void testBitmapCache_discarded_bitmap(skiatest::Reporter* reporter, SkResourceCache* cache,
SkResourceCache::DiscardableFactory factory) {
test_mipmapcache(reporter, cache);
test_mipmap_notify(reporter, cache);
}
DEF_TEST(BitmapCache_discarded_bitmap, reporter) {
const size_t byteLimit = 100 * 1024;
{
SkResourceCache cache(byteLimit);
testBitmapCache_discarded_bitmap(reporter, &cache, nullptr);
}
{
sk_sp<SkDiscardableMemoryPool> pool(SkDiscardableMemoryPool::Create(byteLimit, nullptr));
gPool = pool.get();
SkResourceCache::DiscardableFactory factory = pool_factory;
SkResourceCache cache(factory);
testBitmapCache_discarded_bitmap(reporter, &cache, factory);
}
}
static void test_discarded_image(skiatest::Reporter* reporter, const SkMatrix& transform,
sk_sp<SkImage> (*buildImage)()) {
auto surface(SkSurface::MakeRasterN32Premul(10, 10));
SkCanvas* canvas = surface->getCanvas();
// SkBitmapCache is global, so other threads could be evicting our bitmaps. Loop a few times
// to mitigate this risk.
const unsigned kRepeatCount = 42;
for (unsigned i = 0; i < kRepeatCount; ++i) {
SkAutoCanvasRestore acr(canvas, true);
sk_sp<SkImage> image(buildImage());
// always use high quality to ensure caching when scaled
SkPaint paint;
paint.setFilterQuality(kHigh_SkFilterQuality);
// draw the image (with a transform, to tickle different code paths) to ensure
// any associated resources get cached
canvas->concat(transform);
canvas->drawImage(image, 0, 0, &paint);
auto imageId = image->uniqueID();
// delete the image
image.reset(nullptr);
// all resources should have been purged
SkBitmap result;
REPORTER_ASSERT(reporter, !SkBitmapCache::Find(imageId, &result));
}
}
// Verify that associated bitmap cache entries are purged on SkImage destruction.
DEF_TEST(BitmapCache_discarded_image, reporter) {
// Cache entries associated with SkImages fall into two categories:
//
// 1) generated image bitmaps (managed by the image cacherator)
// 2) scaled/resampled bitmaps (cached when HQ filters are used)
//
// To exercise the first cache type, we use generated/picture-backed SkImages.
// To exercise the latter, we draw scaled bitmap images using HQ filters.
const SkMatrix xforms[] = {
SkMatrix::MakeScale(1, 1),
SkMatrix::MakeScale(1.7f, 0.5f),
};
for (size_t i = 0; i < SK_ARRAY_COUNT(xforms); ++i) {
test_discarded_image(reporter, xforms[i], []() {
auto surface(SkSurface::MakeRasterN32Premul(10, 10));
surface->getCanvas()->clear(SK_ColorCYAN);
return surface->makeImageSnapshot();
});
test_discarded_image(reporter, xforms[i], []() {
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(10, 10);
canvas->clear(SK_ColorCYAN);
return SkImage::MakeFromPicture(recorder.finishRecordingAsPicture(),
SkISize::Make(10, 10), nullptr, nullptr,
SkImage::BitDepth::kU8,
SkColorSpace::MakeSRGB());
});
}
}
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