/* * Copyright 2016 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/SkBitmap.h" #include "include/core/SkCanvas.h" #include "include/core/SkImage.h" #include "src/core/SkBitmapCache.h" #include "src/core/SkSpecialImage.h" #include "src/core/SkSpecialSurface.h" #include "src/core/SkSurfacePriv.h" #include "src/image/SkImage_Base.h" #include #if SK_SUPPORT_GPU #include "include/gpu/GrContext.h" #include "include/private/GrRecordingContext.h" #include "src/gpu/GrContextPriv.h" #include "src/gpu/GrProxyProvider.h" #include "src/gpu/GrRecordingContextPriv.h" #include "src/gpu/GrSurfaceContext.h" #include "src/gpu/GrTextureProxy.h" #include "src/image/SkImage_Gpu.h" #endif // Currently the raster imagefilters can only handle certain imageinfos. Call this to know if // a given info is supported. static bool valid_for_imagefilters(const SkImageInfo& info) { // no support for other swizzles/depths yet return info.colorType() == kN32_SkColorType; } /////////////////////////////////////////////////////////////////////////////// class SkSpecialImage_Base : public SkSpecialImage { public: SkSpecialImage_Base(const SkIRect& subset, uint32_t uniqueID, const SkSurfaceProps* props) : INHERITED(subset, uniqueID, props) { } ~SkSpecialImage_Base() override { } virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*) const = 0; virtual bool onGetROPixels(SkBitmap*) const = 0; virtual GrRecordingContext* onGetContext() const { return nullptr; } virtual SkColorSpace* onGetColorSpace() const = 0; #if SK_SUPPORT_GPU virtual sk_sp onAsTextureProxyRef(GrRecordingContext* context) const = 0; #endif // This subset is relative to the backing store's coordinate frame, it has already been mapped // from the content rect by the non-virtual makeSubset(). virtual sk_sp onMakeSubset(const SkIRect& subset) const = 0; virtual sk_sp onMakeSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at, const SkSurfaceProps* = nullptr) const = 0; // This subset (when not null) is relative to the backing store's coordinate frame, it has // already been mapped from the content rect by the non-virtual asImage(). virtual sk_sp onAsImage(const SkIRect* subset) const = 0; virtual sk_sp onMakeTightSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at) const = 0; private: typedef SkSpecialImage INHERITED; }; /////////////////////////////////////////////////////////////////////////////// static inline const SkSpecialImage_Base* as_SIB(const SkSpecialImage* image) { return static_cast(image); } SkSpecialImage::SkSpecialImage(const SkIRect& subset, uint32_t uniqueID, const SkSurfaceProps* props) : fProps(SkSurfacePropsCopyOrDefault(props)) , fSubset(subset) , fUniqueID(kNeedNewImageUniqueID_SpecialImage == uniqueID ? SkNextID::ImageID() : uniqueID) { } sk_sp SkSpecialImage::makeTextureImage(GrRecordingContext* context) { #if SK_SUPPORT_GPU if (!context) { return nullptr; } if (GrRecordingContext* curContext = as_SIB(this)->onGetContext()) { return curContext->priv().matches(context) ? sk_sp(SkRef(this)) : nullptr; } auto proxyProvider = context->priv().proxyProvider(); SkBitmap bmp; // At this point, we are definitely not texture-backed, so we must be raster or generator // backed. If we remove the special-wrapping-an-image subclass, we may be able to assert that // we are strictly raster-backed (i.e. generator images become raster when they are specialized) // in which case getROPixels could turn into peekPixels... if (!this->getROPixels(&bmp)) { return nullptr; } if (bmp.empty()) { return SkSpecialImage::MakeFromRaster(SkIRect::MakeEmpty(), bmp, &this->props()); } // TODO: this is a tight copy of 'bmp' but it doesn't have to be (given SkSpecialImage's // semantics). Since this is cached though we would have to bake the fit into the cache key. sk_sp proxy = GrMakeCachedBitmapProxy(proxyProvider, bmp); if (!proxy) { return nullptr; } const SkIRect rect = SkIRect::MakeWH(proxy->width(), proxy->height()); // GrMakeCachedBitmapProxy has uploaded only the specified subset of 'bmp' so we need not // bother with SkBitmap::getSubset return SkSpecialImage::MakeDeferredFromGpu(context, rect, this->uniqueID(), std::move(proxy), sk_ref_sp(this->getColorSpace()), &this->props(), this->alphaType()); #else return nullptr; #endif } void SkSpecialImage::draw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const { return as_SIB(this)->onDraw(canvas, x, y, paint); } bool SkSpecialImage::getROPixels(SkBitmap* bm) const { return as_SIB(this)->onGetROPixels(bm); } bool SkSpecialImage::isTextureBacked() const { return SkToBool(as_SIB(this)->onGetContext()); } GrRecordingContext* SkSpecialImage::getContext() const { return as_SIB(this)->onGetContext(); } SkColorSpace* SkSpecialImage::getColorSpace() const { return as_SIB(this)->onGetColorSpace(); } #if SK_SUPPORT_GPU sk_sp SkSpecialImage::asTextureProxyRef(GrRecordingContext* context) const { return as_SIB(this)->onAsTextureProxyRef(context); } #endif sk_sp SkSpecialImage::makeSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at, const SkSurfaceProps* props) const { return as_SIB(this)->onMakeSurface(outProps, size, at, props); } sk_sp SkSpecialImage::makeTightSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at) const { return as_SIB(this)->onMakeTightSurface(outProps, size, at); } sk_sp SkSpecialImage::makeSubset(const SkIRect& subset) const { SkIRect absolute = subset.makeOffset(this->subset().x(), this->subset().y()); return as_SIB(this)->onMakeSubset(absolute); } sk_sp SkSpecialImage::asImage(const SkIRect* subset) const { if (subset) { SkIRect absolute = subset->makeOffset(this->subset().x(), this->subset().y()); return as_SIB(this)->onAsImage(&absolute); } else { return as_SIB(this)->onAsImage(nullptr); } } #if defined(SK_DEBUG) || SK_SUPPORT_GPU static bool rect_fits(const SkIRect& rect, int width, int height) { if (0 == width && 0 == height) { SkASSERT(0 == rect.fLeft && 0 == rect.fRight && 0 == rect.fTop && 0 == rect.fBottom); return true; } return rect.fLeft >= 0 && rect.fLeft < width && rect.fLeft < rect.fRight && rect.fRight >= 0 && rect.fRight <= width && rect.fTop >= 0 && rect.fTop < height && rect.fTop < rect.fBottom && rect.fBottom >= 0 && rect.fBottom <= height; } #endif sk_sp SkSpecialImage::MakeFromImage(GrRecordingContext* context, const SkIRect& subset, sk_sp image, const SkSurfaceProps* props) { SkASSERT(rect_fits(subset, image->width(), image->height())); #if SK_SUPPORT_GPU if (sk_sp proxy = as_IB(image)->asTextureProxyRef(context)) { if (!as_IB(image)->context()->priv().matches(context)) { return nullptr; } return MakeDeferredFromGpu(context, subset, image->uniqueID(), std::move(proxy), image->refColorSpace(), props); } else #endif { SkBitmap bm; if (as_IB(image)->getROPixels(&bm)) { return MakeFromRaster(subset, bm, props); } } return nullptr; } /////////////////////////////////////////////////////////////////////////////// class SkSpecialImage_Raster : public SkSpecialImage_Base { public: SkSpecialImage_Raster(const SkIRect& subset, const SkBitmap& bm, const SkSurfaceProps* props) : INHERITED(subset, bm.getGenerationID(), props) , fBitmap(bm) { SkASSERT(bm.pixelRef()); SkASSERT(fBitmap.getPixels()); } SkAlphaType alphaType() const override { return fBitmap.alphaType(); } size_t getSize() const override { return fBitmap.computeByteSize(); } void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const override { SkRect dst = SkRect::MakeXYWH(x, y, this->subset().width(), this->subset().height()); canvas->drawBitmapRect(fBitmap, this->subset(), dst, paint, SkCanvas::kStrict_SrcRectConstraint); } bool onGetROPixels(SkBitmap* bm) const override { return fBitmap.extractSubset(bm, this->subset()); } SkColorSpace* onGetColorSpace() const override { return fBitmap.colorSpace(); } #if SK_SUPPORT_GPU sk_sp onAsTextureProxyRef(GrRecordingContext* context) const override { if (context) { return GrMakeCachedBitmapProxy(context->priv().proxyProvider(), fBitmap); } return nullptr; } #endif sk_sp onMakeSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at, const SkSurfaceProps* props) const override { SkColorSpace* colorSpace = outProps.colorSpace(); SkColorType colorType = kN32_SkColorType; // TODO: find ways to allow f16 SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType, at, sk_ref_sp(colorSpace)); return SkSpecialSurface::MakeRaster(info, props); } sk_sp onMakeSubset(const SkIRect& subset) const override { // No need to extract subset, onGetROPixels handles that when needed return SkSpecialImage::MakeFromRaster(subset, fBitmap, &this->props()); } sk_sp onAsImage(const SkIRect* subset) const override { if (subset) { SkBitmap subsetBM; if (!fBitmap.extractSubset(&subsetBM, *subset)) { return nullptr; } return SkImage::MakeFromBitmap(subsetBM); } return SkImage::MakeFromBitmap(fBitmap); } sk_sp onMakeTightSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at) const override { SkColorSpace* colorSpace = outProps.colorSpace(); SkColorType colorType = kN32_SkColorType; // TODO: find ways to allow f16 SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType, at, sk_ref_sp(colorSpace)); return SkSurface::MakeRaster(info); } private: SkBitmap fBitmap; typedef SkSpecialImage_Base INHERITED; }; sk_sp SkSpecialImage::MakeFromRaster(const SkIRect& subset, const SkBitmap& bm, const SkSurfaceProps* props) { SkASSERT(rect_fits(subset, bm.width(), bm.height())); if (!bm.pixelRef()) { return nullptr; } const SkBitmap* srcBM = &bm; SkBitmap tmp; // ImageFilters only handle N32 at the moment, so force our src to be that if (!valid_for_imagefilters(bm.info())) { if (!tmp.tryAllocPixels(bm.info().makeColorType(kN32_SkColorType)) || !bm.readPixels(tmp.info(), tmp.getPixels(), tmp.rowBytes(), 0, 0)) { return nullptr; } srcBM = &tmp; } return sk_make_sp(subset, *srcBM, props); } sk_sp SkSpecialImage::CopyFromRaster(const SkIRect& subset, const SkBitmap& bm, const SkSurfaceProps* props) { SkASSERT(rect_fits(subset, bm.width(), bm.height())); if (!bm.pixelRef()) { return nullptr; } SkBitmap tmp; SkImageInfo info = bm.info().makeWH(subset.width(), subset.height()); // As in MakeFromRaster, must force src to N32 for ImageFilters if (!valid_for_imagefilters(bm.info())) { info = info.makeColorType(kN32_SkColorType); } if (!tmp.tryAllocPixels(info)) { return nullptr; } if (!bm.readPixels(tmp.info(), tmp.getPixels(), tmp.rowBytes(), subset.x(), subset.y())) { return nullptr; } // Since we're making a copy of the raster, the resulting special image is the exact size // of the requested subset of the original and no longer needs to be offset by subset's left // and top, since those were relative to the original's buffer. return sk_make_sp( SkIRect::MakeWH(subset.width(), subset.height()), tmp, props); } #if SK_SUPPORT_GPU /////////////////////////////////////////////////////////////////////////////// static sk_sp wrap_proxy_in_image(GrRecordingContext* context, sk_sp proxy, SkAlphaType alphaType, sk_sp colorSpace) { // CONTEXT TODO: remove this use of 'backdoor' to create an SkImage return sk_make_sp(sk_ref_sp(context->priv().backdoor()), kNeedNewImageUniqueID, alphaType, std::move(proxy), std::move(colorSpace)); } class SkSpecialImage_Gpu : public SkSpecialImage_Base { public: SkSpecialImage_Gpu(GrRecordingContext* context, const SkIRect& subset, uint32_t uniqueID, sk_sp proxy, SkAlphaType at, sk_sp colorSpace, const SkSurfaceProps* props) : INHERITED(subset, uniqueID, props) , fContext(context) , fTextureProxy(std::move(proxy)) , fAlphaType(at) , fColorSpace(std::move(colorSpace)) , fAddedRasterVersionToCache(false) { } ~SkSpecialImage_Gpu() override { if (fAddedRasterVersionToCache.load()) { SkNotifyBitmapGenIDIsStale(this->uniqueID()); } } SkAlphaType alphaType() const override { return fAlphaType; } size_t getSize() const override { return fTextureProxy->gpuMemorySize(); } void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const override { SkRect dst = SkRect::MakeXYWH(x, y, this->subset().width(), this->subset().height()); // TODO: In this instance we know we're going to draw a sub-portion of the backing // texture into the canvas so it is okay to wrap it in an SkImage. This poses // some problems for full deferral however in that when the deferred SkImage_Gpu // instantiates itself it is going to have to either be okay with having a larger // than expected backing texture (unlikely) or the 'fit' of the SurfaceProxy needs // to be tightened (if it is deferred). sk_sp img = sk_sp(new SkImage_Gpu(sk_ref_sp(canvas->getGrContext()), this->uniqueID(), fAlphaType, fTextureProxy, fColorSpace)); canvas->drawImageRect(img, this->subset(), dst, paint, SkCanvas::kStrict_SrcRectConstraint); } GrRecordingContext* onGetContext() const override { return fContext; } sk_sp onAsTextureProxyRef(GrRecordingContext*) const override { return fTextureProxy; } bool onGetROPixels(SkBitmap* dst) const override { const auto desc = SkBitmapCacheDesc::Make(this->uniqueID(), this->subset()); if (SkBitmapCache::Find(desc, dst)) { SkASSERT(dst->getGenerationID() == this->uniqueID()); SkASSERT(dst->isImmutable()); SkASSERT(dst->getPixels()); return true; } SkPixmap pmap; SkImageInfo info = SkImageInfo::MakeN32(this->width(), this->height(), this->alphaType(), fColorSpace); auto rec = SkBitmapCache::Alloc(desc, info, &pmap); if (!rec) { return false; } sk_sp sContext = fContext->priv().makeWrappedSurfaceContext( fTextureProxy, SkColorTypeToGrColorType(info.colorType()), this->alphaType(), fColorSpace); if (!sContext) { return false; } if (!sContext->readPixels(info, pmap.writable_addr(), pmap.rowBytes(), {this->subset().left(), this->subset().top()})) { return false; } SkBitmapCache::Add(std::move(rec), dst); fAddedRasterVersionToCache.store(true); return true; } SkColorSpace* onGetColorSpace() const override { return fColorSpace.get(); } sk_sp onMakeSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at, const SkSurfaceProps* props) const override { if (!fContext) { return nullptr; } return SkSpecialSurface::MakeRenderTarget(fContext, size.width(), size.height(), SkColorTypeToGrColorType(outProps.colorType()), sk_ref_sp(outProps.colorSpace()), props); } sk_sp onMakeSubset(const SkIRect& subset) const override { return SkSpecialImage::MakeDeferredFromGpu(fContext, subset, this->uniqueID(), fTextureProxy, fColorSpace, &this->props(), fAlphaType); } // TODO: move all the logic here into the subset-flavor GrSurfaceProxy::copy? sk_sp onAsImage(const SkIRect* subset) const override { if (subset) { // TODO: if this becomes a bottle neck we could base this logic on what the size // will be when it is finally instantiated - but that is more fraught. if (GrProxyProvider::IsFunctionallyExact(fTextureProxy.get()) && 0 == subset->fLeft && 0 == subset->fTop && fTextureProxy->width() == subset->width() && fTextureProxy->height() == subset->height()) { fTextureProxy->priv().exactify(); // The existing GrTexture is already tight so reuse it in the SkImage return wrap_proxy_in_image(fContext, fTextureProxy, fAlphaType, fColorSpace); } sk_sp subsetProxy( GrSurfaceProxy::Copy(fContext, fTextureProxy.get(), GrMipMapped::kNo, *subset, SkBackingFit::kExact, SkBudgeted::kYes)); if (!subsetProxy) { return nullptr; } SkASSERT(subsetProxy->priv().isExact()); // MDB: this is acceptable (wrapping subsetProxy in an SkImage) bc Copy will // return a kExact-backed proxy return wrap_proxy_in_image(fContext, std::move(subsetProxy), fAlphaType, fColorSpace); } fTextureProxy->priv().exactify(); return wrap_proxy_in_image(fContext, fTextureProxy, fAlphaType, fColorSpace); } sk_sp onMakeTightSurface(const SkImageFilter::OutputProperties& outProps, const SkISize& size, SkAlphaType at) const override { SkColorSpace* colorSpace = outProps.colorSpace(); SkColorType colorType = colorSpace && colorSpace->gammaIsLinear() ? kRGBA_F16_SkColorType : kRGBA_8888_SkColorType; SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType, at, sk_ref_sp(colorSpace)); // CONTEXT TODO: remove this use of 'backdoor' to create an SkSurface return SkSurface::MakeRenderTarget(fContext->priv().backdoor(), SkBudgeted::kYes, info); } private: GrRecordingContext* fContext; sk_sp fTextureProxy; const SkAlphaType fAlphaType; sk_sp fColorSpace; mutable std::atomic fAddedRasterVersionToCache; typedef SkSpecialImage_Base INHERITED; }; sk_sp SkSpecialImage::MakeDeferredFromGpu(GrRecordingContext* context, const SkIRect& subset, uint32_t uniqueID, sk_sp proxy, sk_sp colorSpace, const SkSurfaceProps* props, SkAlphaType at) { if (!context || context->priv().abandoned() || !proxy) { return nullptr; } SkASSERT_RELEASE(rect_fits(subset, proxy->width(), proxy->height())); return sk_make_sp(context, subset, uniqueID, std::move(proxy), at, std::move(colorSpace), props); } #endif