| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkImage_Lazy.h" |
| |
| #include "SkBitmap.h" |
| #include "SkBitmapCache.h" |
| #include "SkCachedData.h" |
| #include "SkData.h" |
| #include "SkImageGenerator.h" |
| #include "SkImagePriv.h" |
| #include "SkNextID.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "GrContextPriv.h" |
| #include "GrGpuResourcePriv.h" |
| #include "GrImageTextureMaker.h" |
| #include "GrResourceKey.h" |
| #include "GrProxyProvider.h" |
| #include "GrSamplerState.h" |
| #include "GrYUVProvider.h" |
| #include "SkGr.h" |
| #endif |
| |
| // Ref-counted tuple(SkImageGenerator, SkMutex) which allows sharing one generator among N images |
| class SharedGenerator final : public SkNVRefCnt<SharedGenerator> { |
| public: |
| static sk_sp<SharedGenerator> Make(std::unique_ptr<SkImageGenerator> gen) { |
| return gen ? sk_sp<SharedGenerator>(new SharedGenerator(std::move(gen))) : nullptr; |
| } |
| |
| // This is thread safe. It is a const field set in the constructor. |
| const SkImageInfo& getInfo() { return fGenerator->getInfo(); } |
| |
| private: |
| explicit SharedGenerator(std::unique_ptr<SkImageGenerator> gen) |
| : fGenerator(std::move(gen)) { |
| SkASSERT(fGenerator); |
| } |
| |
| friend class ScopedGenerator; |
| friend class SkImage_Lazy; |
| |
| std::unique_ptr<SkImageGenerator> fGenerator; |
| SkMutex fMutex; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkImage_Lazy::Validator::Validator(sk_sp<SharedGenerator> gen, const SkIRect* subset, |
| sk_sp<SkColorSpace> colorSpace) |
| : fSharedGenerator(std::move(gen)) { |
| if (!fSharedGenerator) { |
| return; |
| } |
| |
| // The following generator accessors are safe without acquiring the mutex (const getters). |
| // TODO: refactor to use a ScopedGenerator instead, for clarity. |
| const SkImageInfo& info = fSharedGenerator->fGenerator->getInfo(); |
| if (info.isEmpty()) { |
| fSharedGenerator.reset(); |
| return; |
| } |
| |
| fUniqueID = fSharedGenerator->fGenerator->uniqueID(); |
| const SkIRect bounds = SkIRect::MakeWH(info.width(), info.height()); |
| if (subset) { |
| if (!bounds.contains(*subset)) { |
| fSharedGenerator.reset(); |
| return; |
| } |
| if (*subset != bounds) { |
| // we need a different uniqueID since we really are a subset of the raw generator |
| fUniqueID = SkNextID::ImageID(); |
| } |
| } else { |
| subset = &bounds; |
| } |
| |
| fInfo = info.makeWH(subset->width(), subset->height()); |
| fOrigin = SkIPoint::Make(subset->x(), subset->y()); |
| if (colorSpace) { |
| fInfo = fInfo.makeColorSpace(colorSpace); |
| fUniqueID = SkNextID::ImageID(); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // Helper for exclusive access to a shared generator. |
| class SkImage_Lazy::ScopedGenerator { |
| public: |
| ScopedGenerator(const sk_sp<SharedGenerator>& gen) |
| : fSharedGenerator(gen) |
| , fAutoAquire(gen->fMutex) {} |
| |
| SkImageGenerator* operator->() const { |
| fSharedGenerator->fMutex.assertHeld(); |
| return fSharedGenerator->fGenerator.get(); |
| } |
| |
| operator SkImageGenerator*() const { |
| fSharedGenerator->fMutex.assertHeld(); |
| return fSharedGenerator->fGenerator.get(); |
| } |
| |
| private: |
| const sk_sp<SharedGenerator>& fSharedGenerator; |
| SkAutoExclusive fAutoAquire; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkImage_Lazy::SkImage_Lazy(Validator* validator) |
| : INHERITED(validator->fInfo.width(), validator->fInfo.height(), validator->fUniqueID) |
| , fSharedGenerator(std::move(validator->fSharedGenerator)) |
| , fInfo(validator->fInfo) |
| , fOrigin(validator->fOrigin) { |
| SkASSERT(fSharedGenerator); |
| fUniqueID = validator->fUniqueID; |
| } |
| |
| SkImage_Lazy::~SkImage_Lazy() { |
| #if SK_SUPPORT_GPU |
| for (int i = 0; i < fUniqueKeyInvalidatedMessages.count(); ++i) { |
| SkMessageBus<GrUniqueKeyInvalidatedMessage>::Post(*fUniqueKeyInvalidatedMessages[i]); |
| } |
| fUniqueKeyInvalidatedMessages.deleteAll(); |
| #endif |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static bool generate_pixels(SkImageGenerator* gen, const SkPixmap& pmap, int originX, int originY) { |
| const int genW = gen->getInfo().width(); |
| const int genH = gen->getInfo().height(); |
| const SkIRect srcR = SkIRect::MakeWH(genW, genH); |
| const SkIRect dstR = SkIRect::MakeXYWH(originX, originY, pmap.width(), pmap.height()); |
| if (!srcR.contains(dstR)) { |
| return false; |
| } |
| |
| // If they are requesting a subset, we have to have a temp allocation for full image, and |
| // then copy the subset into their allocation |
| SkBitmap full; |
| SkPixmap fullPM; |
| const SkPixmap* dstPM = &pmap; |
| if (srcR != dstR) { |
| if (!full.tryAllocPixels(pmap.info().makeWH(genW, genH))) { |
| return false; |
| } |
| if (!full.peekPixels(&fullPM)) { |
| return false; |
| } |
| dstPM = &fullPM; |
| } |
| |
| if (!gen->getPixels(dstPM->info(), dstPM->writable_addr(), dstPM->rowBytes())) { |
| return false; |
| } |
| |
| if (srcR != dstR) { |
| if (!full.readPixels(pmap, originX, originY)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool SkImage_Lazy::getROPixels(SkBitmap* bitmap, SkImage::CachingHint chint) const { |
| auto check_output_bitmap = [bitmap]() { |
| SkASSERT(bitmap->isImmutable()); |
| SkASSERT(bitmap->getPixels()); |
| (void)bitmap; |
| }; |
| |
| auto desc = SkBitmapCacheDesc::Make(this); |
| if (SkBitmapCache::Find(desc, bitmap)) { |
| check_output_bitmap(); |
| return true; |
| } |
| |
| if (SkImage::kAllow_CachingHint == chint) { |
| SkPixmap pmap; |
| SkBitmapCache::RecPtr cacheRec = SkBitmapCache::Alloc(desc, fInfo, &pmap); |
| if (!cacheRec || |
| !generate_pixels(ScopedGenerator(fSharedGenerator), pmap, |
| fOrigin.x(), fOrigin.y())) { |
| return false; |
| } |
| SkBitmapCache::Add(std::move(cacheRec), bitmap); |
| this->notifyAddedToRasterCache(); |
| } else { |
| if (!bitmap->tryAllocPixels(fInfo) || |
| !generate_pixels(ScopedGenerator(fSharedGenerator), bitmap->pixmap(), |
| fOrigin.x(), fOrigin.y())) { |
| return false; |
| } |
| bitmap->setImmutable(); |
| } |
| |
| check_output_bitmap(); |
| return true; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkImage_Lazy::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, |
| int srcX, int srcY, CachingHint chint) const { |
| SkBitmap bm; |
| if (this->getROPixels(&bm, chint)) { |
| return bm.readPixels(dstInfo, dstPixels, dstRB, srcX, srcY); |
| } |
| return false; |
| } |
| |
| sk_sp<SkData> SkImage_Lazy::onRefEncoded() const { |
| ScopedGenerator generator(fSharedGenerator); |
| return generator->refEncodedData(); |
| } |
| |
| bool SkImage_Lazy::onIsValid(GrContext* context) const { |
| ScopedGenerator generator(fSharedGenerator); |
| return generator->isValid(context); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| sk_sp<GrTextureProxy> SkImage_Lazy::asTextureProxyRef(GrContext* context, |
| const GrSamplerState& params, |
| SkScalar scaleAdjust[2]) const { |
| if (!context) { |
| return nullptr; |
| } |
| |
| GrImageTextureMaker textureMaker(context, this, kAllow_CachingHint); |
| return textureMaker.refTextureProxyForParams(params, scaleAdjust); |
| } |
| #endif |
| |
| sk_sp<SkImage> SkImage_Lazy::onMakeSubset(const SkIRect& subset) const { |
| SkASSERT(fInfo.bounds().contains(subset)); |
| SkASSERT(fInfo.bounds() != subset); |
| |
| const SkIRect generatorSubset = subset.makeOffset(fOrigin.x(), fOrigin.y()); |
| Validator validator(fSharedGenerator, &generatorSubset, fInfo.refColorSpace()); |
| return validator ? sk_sp<SkImage>(new SkImage_Lazy(&validator)) : nullptr; |
| } |
| |
| sk_sp<SkImage> SkImage_Lazy::onMakeColorSpace(sk_sp<SkColorSpace> target) const { |
| SkAutoExclusive autoAquire(fOnMakeColorSpaceMutex); |
| if (fOnMakeColorSpaceTarget && |
| SkColorSpace::Equals(target.get(), fOnMakeColorSpaceTarget.get())) { |
| return fOnMakeColorSpaceResult; |
| } |
| const SkIRect generatorSubset = |
| SkIRect::MakeXYWH(fOrigin.x(), fOrigin.y(), fInfo.width(), fInfo.height()); |
| Validator validator(fSharedGenerator, &generatorSubset, target); |
| sk_sp<SkImage> result = validator ? sk_sp<SkImage>(new SkImage_Lazy(&validator)) : nullptr; |
| if (result) { |
| fOnMakeColorSpaceTarget = target; |
| fOnMakeColorSpaceResult = result; |
| } |
| return result; |
| } |
| |
| sk_sp<SkImage> SkImage::MakeFromGenerator(std::unique_ptr<SkImageGenerator> generator, |
| const SkIRect* subset) { |
| SkImage_Lazy::Validator validator(SharedGenerator::Make(std::move(generator)), subset, nullptr); |
| |
| return validator ? sk_make_sp<SkImage_Lazy>(&validator) : nullptr; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| |
| void SkImage_Lazy::makeCacheKeyFromOrigKey(const GrUniqueKey& origKey, |
| GrUniqueKey* cacheKey) const { |
| SkASSERT(!cacheKey->isValid()); |
| if (origKey.isValid()) { |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey::Builder builder(cacheKey, origKey, kDomain, 0, "Image"); |
| } |
| } |
| |
| class Generator_GrYUVProvider : public GrYUVProvider { |
| public: |
| Generator_GrYUVProvider(SkImageGenerator* gen) : fGen(gen) {} |
| |
| private: |
| uint32_t onGetID() const override { return fGen->uniqueID(); } |
| bool onQueryYUVA8(SkYUVASizeInfo* sizeInfo, |
| SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount], |
| SkYUVColorSpace* colorSpace) const override { |
| return fGen->queryYUVA8(sizeInfo, yuvaIndices, colorSpace); |
| } |
| bool onGetYUVA8Planes(const SkYUVASizeInfo& sizeInfo, |
| const SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount], |
| void* planes[]) override { |
| return fGen->getYUVA8Planes(sizeInfo, yuvaIndices, planes); |
| } |
| |
| SkImageGenerator* fGen; |
| |
| typedef GrYUVProvider INHERITED; |
| }; |
| |
| static void set_key_on_proxy(GrProxyProvider* proxyProvider, |
| GrTextureProxy* proxy, GrTextureProxy* originalProxy, |
| const GrUniqueKey& key) { |
| if (key.isValid()) { |
| if (originalProxy && originalProxy->getUniqueKey().isValid()) { |
| SkASSERT(originalProxy->getUniqueKey() == key); |
| SkASSERT(GrMipMapped::kYes == proxy->mipMapped() && |
| GrMipMapped::kNo == originalProxy->mipMapped()); |
| // If we had an originalProxy with a valid key, that means there already is a proxy in |
| // the cache which matches the key, but it does not have mip levels and we require them. |
| // Thus we must remove the unique key from that proxy. |
| proxyProvider->removeUniqueKeyFromProxy(key, originalProxy); |
| } |
| proxyProvider->assignUniqueKeyToProxy(key, proxy); |
| } |
| } |
| |
| sk_sp<SkCachedData> SkImage_Lazy::getPlanes(SkYUVASizeInfo* yuvaSizeInfo, |
| SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount], |
| SkYUVColorSpace* yuvColorSpace, |
| const void* planes[SkYUVASizeInfo::kMaxCount]) { |
| ScopedGenerator generator(fSharedGenerator); |
| Generator_GrYUVProvider provider(generator); |
| |
| sk_sp<SkCachedData> data = provider.getPlanes(yuvaSizeInfo, yuvaIndices, yuvColorSpace, planes); |
| if (!data) { |
| return nullptr; |
| } |
| |
| return data; |
| } |
| |
| |
| /* |
| * We have 4 ways to try to return a texture (in sorted order) |
| * |
| * 1. Check the cache for a pre-existing one |
| * 2. Ask the generator to natively create one |
| * 3. Ask the generator to return YUV planes, which the GPU can convert |
| * 4. Ask the generator to return RGB(A) data, which the GPU can convert |
| */ |
| sk_sp<GrTextureProxy> SkImage_Lazy::lockTextureProxy( |
| GrContext* ctx, |
| const GrUniqueKey& origKey, |
| SkImage::CachingHint chint, |
| bool willBeMipped, |
| GrTextureMaker::AllowedTexGenType genType) const { |
| // Values representing the various texture lock paths we can take. Used for logging the path |
| // taken to a histogram. |
| enum LockTexturePath { |
| kFailure_LockTexturePath, |
| kPreExisting_LockTexturePath, |
| kNative_LockTexturePath, |
| kCompressed_LockTexturePath, // Deprecated |
| kYUV_LockTexturePath, |
| kRGBA_LockTexturePath, |
| }; |
| |
| enum { kLockTexturePathCount = kRGBA_LockTexturePath + 1 }; |
| |
| // Build our texture key. |
| // Even though some proxies created here may have a specific origin and use that origin, we do |
| // not include that in the key. Since SkImages are meant to be immutable, a given SkImage will |
| // always have an associated proxy that is always one origin or the other. It never can change |
| // origins. Thus we don't need to include that info in the key iteself. |
| GrUniqueKey key; |
| this->makeCacheKeyFromOrigKey(origKey, &key); |
| |
| GrProxyProvider* proxyProvider = ctx->contextPriv().proxyProvider(); |
| sk_sp<GrTextureProxy> proxy; |
| |
| // 1. Check the cache for a pre-existing one |
| if (key.isValid()) { |
| proxy = proxyProvider->findOrCreateProxyByUniqueKey(key, kTopLeft_GrSurfaceOrigin); |
| if (proxy) { |
| SK_HISTOGRAM_ENUMERATION("LockTexturePath", kPreExisting_LockTexturePath, |
| kLockTexturePathCount); |
| if (!willBeMipped || GrMipMapped::kYes == proxy->mipMapped()) { |
| return proxy; |
| } |
| } |
| } |
| |
| // 2. Ask the generator to natively create one |
| if (!proxy) { |
| ScopedGenerator generator(fSharedGenerator); |
| if (GrTextureMaker::AllowedTexGenType::kCheap == genType && |
| SkImageGenerator::TexGenType::kCheap != generator->onCanGenerateTexture()) { |
| return nullptr; |
| } |
| if ((proxy = generator->generateTexture(ctx, fInfo, fOrigin, willBeMipped))) { |
| SK_HISTOGRAM_ENUMERATION("LockTexturePath", kNative_LockTexturePath, |
| kLockTexturePathCount); |
| set_key_on_proxy(proxyProvider, proxy.get(), nullptr, key); |
| if (!willBeMipped || GrMipMapped::kYes == proxy->mipMapped()) { |
| *fUniqueKeyInvalidatedMessages.append() = |
| new GrUniqueKeyInvalidatedMessage(key, ctx->uniqueID()); |
| return proxy; |
| } |
| } |
| } |
| |
| // 3. Ask the generator to return YUV planes, which the GPU can convert. If we will be mipping |
| // the texture we fall through here and have the CPU generate the mip maps for us. |
| if (!proxy && !willBeMipped && !ctx->contextPriv().disableGpuYUVConversion()) { |
| const GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(fInfo); |
| |
| SkColorType colorType = fInfo.colorType(); |
| GrBackendFormat format = |
| ctx->contextPriv().caps()->getBackendFormatFromColorType(colorType); |
| |
| ScopedGenerator generator(fSharedGenerator); |
| Generator_GrYUVProvider provider(generator); |
| |
| // The pixels in the texture will be in the generator's color space. If onMakeColorSpace |
| // has been called then this will not match this image's color space. To correct this, apply |
| // a color space conversion from the generator's color space to this image's color space. |
| SkColorSpace* generatorColorSpace = fSharedGenerator->fGenerator->getInfo().colorSpace(); |
| SkColorSpace* thisColorSpace = fInfo.colorSpace(); |
| |
| // TODO: Update to create the mipped surface in the YUV generator and draw the base |
| // layer directly into the mipped surface. |
| proxy = provider.refAsTextureProxy(ctx, format, desc, generatorColorSpace, thisColorSpace); |
| if (proxy) { |
| SK_HISTOGRAM_ENUMERATION("LockTexturePath", kYUV_LockTexturePath, |
| kLockTexturePathCount); |
| set_key_on_proxy(proxyProvider, proxy.get(), nullptr, key); |
| *fUniqueKeyInvalidatedMessages.append() = |
| new GrUniqueKeyInvalidatedMessage(key, ctx->uniqueID()); |
| return proxy; |
| } |
| } |
| |
| // 4. Ask the generator to return RGB(A) data, which the GPU can convert |
| SkBitmap bitmap; |
| if (!proxy && this->getROPixels(&bitmap, chint)) { |
| if (willBeMipped) { |
| proxy = proxyProvider->createMipMapProxyFromBitmap(bitmap); |
| } |
| if (!proxy) { |
| proxy = GrUploadBitmapToTextureProxy(proxyProvider, bitmap); |
| } |
| if (proxy && (!willBeMipped || GrMipMapped::kYes == proxy->mipMapped())) { |
| SK_HISTOGRAM_ENUMERATION("LockTexturePath", kRGBA_LockTexturePath, |
| kLockTexturePathCount); |
| set_key_on_proxy(proxyProvider, proxy.get(), nullptr, key); |
| *fUniqueKeyInvalidatedMessages.append() = |
| new GrUniqueKeyInvalidatedMessage(key, ctx->uniqueID()); |
| return proxy; |
| } |
| } |
| |
| if (proxy) { |
| // We need a mipped proxy, but we either found a proxy earlier that wasn't mipped, generated |
| // a native non mipped proxy, or generated a non-mipped yuv proxy. Thus we generate a new |
| // mipped surface and copy the original proxy into the base layer. We will then let the gpu |
| // generate the rest of the mips. |
| SkASSERT(willBeMipped); |
| SkASSERT(GrMipMapped::kNo == proxy->mipMapped()); |
| *fUniqueKeyInvalidatedMessages.append() = |
| new GrUniqueKeyInvalidatedMessage(key, ctx->uniqueID()); |
| if (auto mippedProxy = GrCopyBaseMipMapToTextureProxy(ctx, proxy.get())) { |
| set_key_on_proxy(proxyProvider, mippedProxy.get(), proxy.get(), key); |
| return mippedProxy; |
| } |
| // We failed to make a mipped proxy with the base copied into it. This could have |
| // been from failure to make the proxy or failure to do the copy. Thus we will fall |
| // back to just using the non mipped proxy; See skbug.com/7094. |
| return proxy; |
| } |
| |
| SK_HISTOGRAM_ENUMERATION("LockTexturePath", kFailure_LockTexturePath, |
| kLockTexturePathCount); |
| return nullptr; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #endif |
