| /* |
| * 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_Base.h" |
| #include "SkImageCacherator.h" |
| |
| #include "SkBitmap.h" |
| #include "SkBitmapCache.h" |
| #include "SkData.h" |
| #include "SkImageGenerator.h" |
| #include "SkImagePriv.h" |
| #include "SkNextID.h" |
| #include "SkPixelRef.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; |
| }; |
| |
| class SkImage_Lazy : public SkImage_Base, public SkImageCacherator { |
| public: |
| struct Validator { |
| Validator(sk_sp<SharedGenerator>, const SkIRect* subset, sk_sp<SkColorSpace> colorSpace); |
| |
| operator bool() const { return fSharedGenerator.get(); } |
| |
| sk_sp<SharedGenerator> fSharedGenerator; |
| SkImageInfo fInfo; |
| SkIPoint fOrigin; |
| sk_sp<SkColorSpace> fColorSpace; |
| uint32_t fUniqueID; |
| }; |
| |
| SkImage_Lazy(Validator* validator); |
| |
| SkImageInfo onImageInfo() const override { |
| return fInfo; |
| } |
| SkColorType onColorType() const override { |
| return kUnknown_SkColorType; |
| } |
| SkAlphaType onAlphaType() const override { |
| return fInfo.alphaType(); |
| } |
| |
| SkIRect onGetSubset() const override { |
| return SkIRect::MakeXYWH(fOrigin.fX, fOrigin.fY, fInfo.width(), fInfo.height()); |
| } |
| |
| bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY, |
| CachingHint) const override; |
| #if SK_SUPPORT_GPU |
| sk_sp<GrTextureProxy> asTextureProxyRef(GrContext*, |
| const GrSamplerState&, SkColorSpace*, |
| sk_sp<SkColorSpace>*, |
| SkScalar scaleAdjust[2]) const override; |
| #endif |
| sk_sp<SkData> onRefEncoded() const override; |
| sk_sp<SkImage> onMakeSubset(const SkIRect&) const override; |
| bool getROPixels(SkBitmap*, SkColorSpace* dstColorSpace, CachingHint) const override; |
| bool onIsLazyGenerated() const override { return true; } |
| bool onCanLazyGenerateOnGPU() const override; |
| sk_sp<SkImage> onMakeColorSpace(sk_sp<SkColorSpace>, SkColorType, |
| SkTransferFunctionBehavior) const override; |
| |
| bool onIsValid(GrContext*) const override; |
| |
| SkImageCacherator* peekCacherator() const override { |
| return const_cast<SkImage_Lazy*>(this); |
| } |
| |
| // Only return true if the generate has already been cached. |
| bool lockAsBitmapOnlyIfAlreadyCached(SkBitmap*, CachedFormat) const; |
| // Call the underlying generator directly |
| bool directGeneratePixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, |
| int srcX, int srcY, SkTransferFunctionBehavior behavior) const; |
| |
| // SkImageCacherator interface |
| #if SK_SUPPORT_GPU |
| // Returns the texture proxy. If the cacherator is generating the texture and wants to cache it, |
| // it should use the passed in key (if the key is valid). |
| sk_sp<GrTextureProxy> lockTextureProxy(GrContext*, |
| const GrUniqueKey& key, |
| SkImage::CachingHint, |
| bool willBeMipped, |
| SkColorSpace* dstColorSpace, |
| GrTextureMaker::AllowedTexGenType genType) override; |
| |
| // Returns the color space of the texture that would be returned if you called lockTexture. |
| // Separate code path to allow querying of the color space for textures that cached (even |
| // externally). |
| sk_sp<SkColorSpace> getColorSpace(GrContext*, SkColorSpace* dstColorSpace) override; |
| void makeCacheKeyFromOrigKey(const GrUniqueKey& origKey, CachedFormat, |
| GrUniqueKey* cacheKey) override; |
| #endif |
| |
| CachedFormat chooseCacheFormat(SkColorSpace* dstColorSpace, |
| const GrCaps* = nullptr) const override; |
| SkImageInfo buildCacheInfo(CachedFormat) const override; |
| |
| private: |
| class ScopedGenerator; |
| |
| /** |
| * On success (true), bitmap will point to the pixels for this generator. If this returns |
| * false, the bitmap will be reset to empty. |
| */ |
| bool lockAsBitmap(SkBitmap*, SkImage::CachingHint, CachedFormat, const SkImageInfo&, |
| SkTransferFunctionBehavior) const; |
| |
| /** |
| * Populates parameters to pass to the generator for reading pixels or generating a texture. |
| * For image generators, legacy versus true color blending is indicated using a |
| * SkTransferFunctionBehavior, and the target color space is specified on the SkImageInfo. |
| * If generatorImageInfo has no color space set, set its color space to this SkImage's color |
| * space, and return "ignore" behavior, indicating legacy mode. If generatorImageInfo has a |
| * color space set, return "respect" behavior, indicating linear blending mode. |
| */ |
| SkTransferFunctionBehavior getGeneratorBehaviorAndInfo(SkImageInfo* generatorImageInfo) const; |
| |
| sk_sp<SharedGenerator> fSharedGenerator; |
| // Note that fInfo is not necessarily the info from the generator. It may be cropped by |
| // onMakeSubset and its color space may be changed by onMakeColorSpace. |
| const SkImageInfo fInfo; |
| const SkIPoint fOrigin; |
| |
| struct IDRec { |
| SkOnce fOnce; |
| uint32_t fUniqueID; |
| }; |
| mutable IDRec fIDRecs[kNumCachedFormats]; |
| |
| uint32_t getUniqueID(CachedFormat) const; |
| |
| // Repeated calls to onMakeColorSpace will result in a proliferation of unique IDs and |
| // SkImage_Lazy instances. Cache the result of the last successful onMakeColorSpace call. |
| mutable SkMutex fOnMakeColorSpaceMutex; |
| mutable sk_sp<SkColorSpace> fOnMakeColorSpaceTarget; |
| mutable sk_sp<SkImage> fOnMakeColorSpaceResult; |
| |
| typedef SkImage_Base INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| 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); |
| // We explicit set the legacy format slot, but leave the others uninitialized (via SkOnce) |
| // and only resolove them to IDs as needed (by calling getUniqueID()). |
| fIDRecs[kLegacy_CachedFormat].fOnce([this, validator] { |
| fIDRecs[kLegacy_CachedFormat].fUniqueID = validator->fUniqueID; |
| }); |
| } |
| |
| uint32_t SkImage_Lazy::getUniqueID(CachedFormat format) const { |
| IDRec* rec = &fIDRecs[format]; |
| rec->fOnce([rec] { |
| rec->fUniqueID = SkNextID::ImageID(); |
| }); |
| return rec->fUniqueID; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| // Abstraction of GrCaps that handles the cases where we don't have a caps pointer (because |
| // we're in raster mode), or where GPU support is entirely missing. In theory, we only need the |
| // chosen format to be texturable, but that lets us choose F16 on GLES implemenations where we |
| // won't be able to read the texture back. We'd like to ensure that SkImake::makeNonTextureImage |
| // works, so we require that the formats we choose are renderable (as a proxy for being readable). |
| struct CacheCaps { |
| CacheCaps(const GrCaps* caps) : fCaps(caps) {} |
| |
| #if SK_SUPPORT_GPU |
| bool supportsHalfFloat() const { |
| return !fCaps || (fCaps->isConfigTexturable(kRGBA_half_GrPixelConfig) && |
| fCaps->isConfigRenderable(kRGBA_half_GrPixelConfig)); |
| } |
| |
| bool supportsSRGB() const { |
| return !fCaps || |
| (fCaps->srgbSupport() && fCaps->isConfigTexturable(kSRGBA_8888_GrPixelConfig)); |
| } |
| |
| bool supportsSBGR() const { |
| return !fCaps || fCaps->srgbSupport(); |
| } |
| #else |
| bool supportsHalfFloat() const { return true; } |
| bool supportsSRGB() const { return true; } |
| bool supportsSBGR() const { return true; } |
| #endif |
| |
| const GrCaps* fCaps; |
| }; |
| |
| SkImageCacherator::CachedFormat SkImage_Lazy::chooseCacheFormat(SkColorSpace* dstColorSpace, |
| const GrCaps* grCaps) const { |
| SkColorSpace* cs = fInfo.colorSpace(); |
| if (!cs || !dstColorSpace) { |
| return kLegacy_CachedFormat; |
| } |
| |
| CacheCaps caps(grCaps); |
| switch (fInfo.colorType()) { |
| case kUnknown_SkColorType: |
| case kAlpha_8_SkColorType: |
| case kRGB_565_SkColorType: |
| case kARGB_4444_SkColorType: |
| case kRGB_888x_SkColorType: |
| case kRGBA_1010102_SkColorType: |
| case kRGB_101010x_SkColorType: |
| // We don't support color space on these formats, so always decode in legacy mode: |
| // TODO: Ask the codec to decode these to something else (at least sRGB 8888)? |
| return kLegacy_CachedFormat; |
| |
| case kGray_8_SkColorType: |
| // TODO: What do we do with grayscale sources that have strange color spaces attached? |
| // The codecs and color space xform don't handle this correctly (yet), so drop it on |
| // the floor. (Also, inflating by a factor of 8 is going to be unfortunate). |
| // As it is, we don't directly support sRGB grayscale, so ask the codec to convert |
| // it for us. This bypasses some really sketchy code GrUploadPixmapToTexture. |
| if (cs->gammaCloseToSRGB() && caps.supportsSRGB()) { |
| return kSRGB8888_CachedFormat; |
| } else { |
| return kLegacy_CachedFormat; |
| } |
| |
| case kRGBA_8888_SkColorType: |
| if (cs->gammaCloseToSRGB()) { |
| if (caps.supportsSRGB()) { |
| return kSRGB8888_CachedFormat; |
| } else if (caps.supportsHalfFloat()) { |
| return kLinearF16_CachedFormat; |
| } else { |
| return kLegacy_CachedFormat; |
| } |
| } else { |
| if (caps.supportsHalfFloat()) { |
| return kLinearF16_CachedFormat; |
| } else if (caps.supportsSRGB()) { |
| return kSRGB8888_CachedFormat; |
| } else { |
| return kLegacy_CachedFormat; |
| } |
| } |
| |
| case kBGRA_8888_SkColorType: |
| // Odd case. sBGRA isn't a real thing, so we may not have this texturable. |
| if (caps.supportsSBGR()) { |
| if (cs->gammaCloseToSRGB()) { |
| return kSBGR8888_CachedFormat; |
| } else if (caps.supportsHalfFloat()) { |
| return kLinearF16_CachedFormat; |
| } else if (caps.supportsSRGB()) { |
| return kSRGB8888_CachedFormat; |
| } else { |
| // sBGRA support without sRGBA is highly unlikely (impossible?) Nevertheless. |
| return kLegacy_CachedFormat; |
| } |
| } else { |
| if (cs->gammaCloseToSRGB()) { |
| if (caps.supportsSRGB()) { |
| return kSRGB8888_CachedFormat; |
| } else if (caps.supportsHalfFloat()) { |
| return kLinearF16_CachedFormat; |
| } else { |
| return kLegacy_CachedFormat; |
| } |
| } else { |
| if (caps.supportsHalfFloat()) { |
| return kLinearF16_CachedFormat; |
| } else if (caps.supportsSRGB()) { |
| return kSRGB8888_CachedFormat; |
| } else { |
| return kLegacy_CachedFormat; |
| } |
| } |
| } |
| |
| case kRGBA_F16_SkColorType: |
| if (caps.supportsHalfFloat()) { |
| return kLinearF16_CachedFormat; |
| } else if (caps.supportsSRGB()) { |
| return kSRGB8888_CachedFormat; |
| } else { |
| return kLegacy_CachedFormat; |
| } |
| } |
| SkDEBUGFAIL("Unreachable"); |
| return kLegacy_CachedFormat; |
| } |
| |
| SkImageInfo SkImage_Lazy::buildCacheInfo(CachedFormat format) const { |
| switch (format) { |
| case kLegacy_CachedFormat: |
| return fInfo.makeColorSpace(nullptr); |
| case kLinearF16_CachedFormat: |
| return fInfo.makeColorType(kRGBA_F16_SkColorType) |
| .makeColorSpace(fInfo.colorSpace()->makeLinearGamma()); |
| case kSRGB8888_CachedFormat: |
| // If the transfer function is nearly (but not exactly) sRGB, we don't want the codec |
| // to bother trans-coding. It would be slow, and do more harm than good visually, |
| // so we make sure to leave the colorspace as-is. |
| if (fInfo.colorSpace()->gammaCloseToSRGB()) { |
| return fInfo.makeColorType(kRGBA_8888_SkColorType); |
| } else { |
| return fInfo.makeColorType(kRGBA_8888_SkColorType) |
| .makeColorSpace(fInfo.colorSpace()->makeSRGBGamma()); |
| } |
| case kSBGR8888_CachedFormat: |
| // See note above about not-quite-sRGB transfer functions. |
| if (fInfo.colorSpace()->gammaCloseToSRGB()) { |
| return fInfo.makeColorType(kBGRA_8888_SkColorType); |
| } else { |
| return fInfo.makeColorType(kBGRA_8888_SkColorType) |
| .makeColorSpace(fInfo.colorSpace()->makeSRGBGamma()); |
| } |
| default: |
| SkDEBUGFAIL("Invalid cached format"); |
| return fInfo; |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static bool check_output_bitmap(const SkBitmap& bitmap, uint32_t expectedID) { |
| SkASSERT(bitmap.getGenerationID() == expectedID); |
| SkASSERT(bitmap.isImmutable()); |
| SkASSERT(bitmap.getPixels()); |
| return true; |
| } |
| |
| bool SkImage_Lazy::directGeneratePixels(const SkImageInfo& info, void* pixels, size_t rb, |
| int srcX, int srcY, |
| SkTransferFunctionBehavior behavior) const { |
| ScopedGenerator generator(fSharedGenerator); |
| const SkImageInfo& genInfo = generator->getInfo(); |
| // Currently generators do not natively handle subsets, so check that first. |
| if (srcX || srcY || genInfo.width() != info.width() || genInfo.height() != info.height()) { |
| return false; |
| } |
| |
| SkImageGenerator::Options opts; |
| // TODO: This should respect the behavior argument. |
| opts.fBehavior = SkTransferFunctionBehavior::kIgnore; |
| return generator->getPixels(info, pixels, rb, &opts); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkImage_Lazy::lockAsBitmapOnlyIfAlreadyCached(SkBitmap* bitmap, CachedFormat format) const { |
| uint32_t uniqueID = this->getUniqueID(format); |
| return SkBitmapCache::Find(SkBitmapCacheDesc::Make(uniqueID, |
| fInfo.width(), fInfo.height()), bitmap) && |
| check_output_bitmap(*bitmap, uniqueID); |
| } |
| |
| static bool generate_pixels(SkImageGenerator* gen, const SkPixmap& pmap, int originX, int originY, |
| SkTransferFunctionBehavior behavior) { |
| 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; |
| } |
| |
| SkImageGenerator::Options opts; |
| opts.fBehavior = behavior; |
| if (!gen->getPixels(dstPM->info(), dstPM->writable_addr(), dstPM->rowBytes(), &opts)) { |
| return false; |
| } |
| |
| if (srcR != dstR) { |
| if (!full.readPixels(pmap, originX, originY)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool SkImage_Lazy::lockAsBitmap(SkBitmap* bitmap, SkImage::CachingHint chint, CachedFormat format, |
| const SkImageInfo& info, |
| SkTransferFunctionBehavior behavior) const { |
| if (this->lockAsBitmapOnlyIfAlreadyCached(bitmap, format)) { |
| return true; |
| } |
| |
| uint32_t uniqueID = this->getUniqueID(format); |
| |
| SkBitmap tmpBitmap; |
| SkBitmapCache::RecPtr cacheRec; |
| SkPixmap pmap; |
| if (SkImage::kAllow_CachingHint == chint) { |
| auto desc = SkBitmapCacheDesc::Make(uniqueID, info.width(), info.height()); |
| cacheRec = SkBitmapCache::Alloc(desc, info, &pmap); |
| if (!cacheRec) { |
| return false; |
| } |
| } else { |
| if (!tmpBitmap.tryAllocPixels(info)) { |
| return false; |
| } |
| if (!tmpBitmap.peekPixels(&pmap)) { |
| return false; |
| } |
| } |
| |
| ScopedGenerator generator(fSharedGenerator); |
| if (!generate_pixels(generator, pmap, fOrigin.x(), fOrigin.y(), behavior)) { |
| return false; |
| } |
| |
| if (cacheRec) { |
| SkBitmapCache::Add(std::move(cacheRec), bitmap); |
| SkASSERT(bitmap->getPixels()); // we're locked |
| SkASSERT(bitmap->isImmutable()); |
| SkASSERT(bitmap->getGenerationID() == uniqueID); |
| this->notifyAddedToCache(); |
| } else { |
| *bitmap = tmpBitmap; |
| bitmap->pixelRef()->setImmutableWithID(uniqueID); |
| } |
| |
| check_output_bitmap(*bitmap, uniqueID); |
| return true; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkImage_Lazy::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, |
| int srcX, int srcY, CachingHint chint) const { |
| SkColorSpace* dstColorSpace = dstInfo.colorSpace(); |
| SkBitmap bm; |
| if (kDisallow_CachingHint == chint) { |
| CachedFormat cacheFormat = this->chooseCacheFormat(dstColorSpace); |
| SkImageInfo genPixelsInfo = dstInfo; |
| SkTransferFunctionBehavior behavior = getGeneratorBehaviorAndInfo(&genPixelsInfo); |
| if (this->lockAsBitmapOnlyIfAlreadyCached(&bm, cacheFormat)) { |
| return bm.readPixels(dstInfo, dstPixels, dstRB, srcX, srcY); |
| } else { |
| // Try passing the caller's buffer directly down to the generator. If this fails we |
| // may still succeed in the general case, as the generator may prefer some other |
| // config, which we could then convert via SkBitmap::readPixels. |
| if (this->directGeneratePixels(genPixelsInfo, dstPixels, dstRB, srcX, srcY, behavior)) { |
| return true; |
| } |
| // else fall through |
| } |
| } |
| |
| if (this->getROPixels(&bm, dstColorSpace, 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::getROPixels(SkBitmap* bitmap, SkColorSpace* dstColorSpace, |
| CachingHint chint) const { |
| CachedFormat cacheFormat = this->chooseCacheFormat(dstColorSpace); |
| const SkImageInfo cacheInfo = this->buildCacheInfo(cacheFormat); |
| SkImageInfo genPixelsInfo = cacheInfo; |
| SkTransferFunctionBehavior behavior = getGeneratorBehaviorAndInfo(&genPixelsInfo); |
| return this->lockAsBitmap(bitmap, chint, cacheFormat, genPixelsInfo, behavior); |
| } |
| |
| bool SkImage_Lazy::onIsValid(GrContext* context) const { |
| ScopedGenerator generator(fSharedGenerator); |
| return generator->isValid(context); |
| } |
| |
| bool SkImage_Lazy::onCanLazyGenerateOnGPU() const { |
| #if SK_SUPPORT_GPU |
| ScopedGenerator generator(fSharedGenerator); |
| return SkImageGenerator::TexGenType::kNone != generator->onCanGenerateTexture(); |
| #else |
| return false; |
| #endif |
| } |
| |
| SkTransferFunctionBehavior SkImage_Lazy::getGeneratorBehaviorAndInfo(SkImageInfo* generatorImageInfo) const { |
| if (generatorImageInfo->colorSpace()) { |
| return SkTransferFunctionBehavior::kRespect; |
| } |
| // Only specify an output color space if color conversion can be done on the color type. |
| switch (generatorImageInfo->colorType()) { |
| case kRGBA_8888_SkColorType: |
| case kBGRA_8888_SkColorType: |
| case kRGBA_F16_SkColorType: |
| case kRGB_565_SkColorType: |
| *generatorImageInfo = generatorImageInfo->makeColorSpace(fInfo.refColorSpace()); |
| break; |
| default: |
| break; |
| } |
| return SkTransferFunctionBehavior::kIgnore; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| sk_sp<GrTextureProxy> SkImage_Lazy::asTextureProxyRef(GrContext* context, |
| const GrSamplerState& params, |
| SkColorSpace* dstColorSpace, |
| sk_sp<SkColorSpace>* texColorSpace, |
| SkScalar scaleAdjust[2]) const { |
| if (!context) { |
| return nullptr; |
| } |
| |
| GrImageTextureMaker textureMaker(context, this, kAllow_CachingHint); |
| return textureMaker.refTextureProxyForParams(params, dstColorSpace, texColorSpace, 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, |
| SkColorType targetColorType, |
| SkTransferFunctionBehavior premulBehavior) const { |
| SkAutoExclusive autoAquire(fOnMakeColorSpaceMutex); |
| if (target && 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; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * Implementation of SkImageCacherator interface, as needed by GrImageTextureMaker |
| */ |
| |
| #if SK_SUPPORT_GPU |
| |
| void SkImage_Lazy::makeCacheKeyFromOrigKey(const GrUniqueKey& origKey, CachedFormat format, |
| GrUniqueKey* cacheKey) { |
| SkASSERT(!cacheKey->isValid()); |
| if (origKey.isValid()) { |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey::Builder builder(cacheKey, origKey, kDomain, 1, "Image"); |
| builder[0] = format; |
| } |
| } |
| |
| class Generator_GrYUVProvider : public GrYUVProvider { |
| SkImageGenerator* fGen; |
| |
| public: |
| Generator_GrYUVProvider(SkImageGenerator* gen) : fGen(gen) {} |
| |
| uint32_t onGetID() override { return fGen->uniqueID(); } |
| bool onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const override { |
| return fGen->queryYUV8(sizeInfo, colorSpace); |
| } |
| bool onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) override { |
| return fGen->getYUV8Planes(sizeInfo, planes); |
| } |
| }; |
| |
| static void set_key_on_proxy(GrProxyProvider* proxyProvider, |
| GrTextureProxy* proxy, GrTextureProxy* originalProxy, |
| const GrUniqueKey& key) { |
| if (key.isValid()) { |
| SkASSERT(proxy->origin() == kTopLeft_GrSurfaceOrigin); |
| 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<SkColorSpace> SkImage_Lazy::getColorSpace(GrContext* ctx, SkColorSpace* dstColorSpace) { |
| if (!dstColorSpace) { |
| // In legacy mode, we do no modification to the image's color space or encoding. |
| // Subsequent legacy drawing is likely to ignore the color space, but some clients |
| // may want to know what space the image data is in, so return it. |
| return fInfo.refColorSpace(); |
| } else { |
| CachedFormat format = this->chooseCacheFormat(dstColorSpace, ctx->contextPriv().caps()); |
| SkImageInfo cacheInfo = this->buildCacheInfo(format); |
| return cacheInfo.refColorSpace(); |
| } |
| } |
| |
| /* |
| * 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, |
| SkColorSpace* dstColorSpace, |
| GrTextureMaker::AllowedTexGenType genType) { |
| // 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 }; |
| |
| // Determine which cached format we're going to use (which may involve decoding to a different |
| // info than the generator provides). |
| CachedFormat format = this->chooseCacheFormat(dstColorSpace, ctx->contextPriv().caps()); |
| |
| // Fold the cache format into our texture key |
| GrUniqueKey key; |
| this->makeCacheKeyFromOrigKey(origKey, format, &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; |
| } |
| } |
| } |
| |
| // The CachedFormat is both an index for which cache "slot" we'll use to store this particular |
| // decoded variant of the encoded data, and also a recipe for how to transform the original |
| // info to get the one that we're going to decode to. |
| const SkImageInfo cacheInfo = this->buildCacheInfo(format); |
| SkImageInfo genPixelsInfo = cacheInfo; |
| SkTransferFunctionBehavior behavior = getGeneratorBehaviorAndInfo(&genPixelsInfo); |
| |
| // 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, genPixelsInfo, fOrigin, behavior, |
| willBeMipped))) { |
| SK_HISTOGRAM_ENUMERATION("LockTexturePath", kNative_LockTexturePath, |
| kLockTexturePathCount); |
| set_key_on_proxy(proxyProvider, proxy.get(), nullptr, key); |
| if (!willBeMipped || GrMipMapped::kYes == proxy->mipMapped()) { |
| 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(cacheInfo); |
| 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. |
| // Note that we can only do this conversion (on the GPU) if both color spaces are XYZ type. |
| SkColorSpace* generatorColorSpace = fSharedGenerator->fGenerator->getInfo().colorSpace(); |
| SkColorSpace* thisColorSpace = fInfo.colorSpace(); |
| |
| if ((!generatorColorSpace || generatorColorSpace->toXYZD50()) && |
| (!thisColorSpace || thisColorSpace->toXYZD50())) { |
| // 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, desc, generatorColorSpace, thisColorSpace); |
| if (proxy) { |
| SK_HISTOGRAM_ENUMERATION("LockTexturePath", kYUV_LockTexturePath, |
| kLockTexturePathCount); |
| set_key_on_proxy(proxyProvider, proxy.get(), nullptr, key); |
| return proxy; |
| } |
| } |
| } |
| |
| // 4. Ask the generator to return RGB(A) data, which the GPU can convert |
| SkBitmap bitmap; |
| if (!proxy && this->lockAsBitmap(&bitmap, chint, format, genPixelsInfo, behavior)) { |
| 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); |
| 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()); |
| 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 |
