RENDERTHREAD_SKIA_PIPELINE_TEST(CacheManager, trimMemory) { DisplayInfo displayInfo = renderThread.mainDisplayInfo(); GrContext* grContext = renderThread.getGrContext(); ASSERT_TRUE(grContext != nullptr); // create pairs of offscreen render targets and images until we exceed the // backgroundCacheSizeLimit std::vector<sk_sp<SkSurface>> surfaces; while (getCacheUsage(grContext) <= renderThread.cacheManager().getBackgroundCacheSize()) { SkImageInfo info = SkImageInfo::MakeA8(displayInfo.w, displayInfo.h); sk_sp<SkSurface> surface = SkSurface::MakeRenderTarget(grContext, SkBudgeted::kYes, info); surface->getCanvas()->drawColor(SK_AlphaTRANSPARENT); grContext->flush(); surfaces.push_back(surface); } // create an image and pin it so that we have something with a unique key in the cache sk_sp<Bitmap> bitmap = Bitmap::allocateHeapBitmap(SkImageInfo::MakeA8(displayInfo.w, displayInfo.h)); sk_sp<SkColorFilter> filter; sk_sp<SkImage> image = bitmap->makeImage(&filter); ASSERT_TRUE(SkImage_pinAsTexture(image.get(), grContext)); // attempt to trim all memory while we still hold strong refs renderThread.cacheManager().trimMemory(CacheManager::TrimMemoryMode::Complete); ASSERT_TRUE(0 == grContext->getResourceCachePurgeableBytes()); // free the surfaces for (size_t i = 0; i < surfaces.size(); i++) { ASSERT_TRUE(surfaces[i]->unique()); surfaces[i].reset(); } // unpin the image which should add a unique purgeable key to the cache SkImage_unpinAsTexture(image.get(), grContext); // verify that we have enough purgeable bytes const size_t purgeableBytes = grContext->getResourceCachePurgeableBytes(); ASSERT_TRUE(renderThread.cacheManager().getBackgroundCacheSize() < purgeableBytes); // UI hidden and make sure only some got purged (unique should remain) renderThread.cacheManager().trimMemory(CacheManager::TrimMemoryMode::UiHidden); ASSERT_TRUE(0 < grContext->getResourceCachePurgeableBytes()); ASSERT_TRUE(renderThread.cacheManager().getBackgroundCacheSize() > getCacheUsage(grContext)); // complete and make sure all get purged renderThread.cacheManager().trimMemory(CacheManager::TrimMemoryMode::Complete); ASSERT_TRUE(0 == grContext->getResourceCachePurgeableBytes()); }