| /* |
| * 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 "SkSpecialImage.h" |
| #include "SkBitmap.h" |
| #include "SkImage.h" |
| #include "SkBitmapCache.h" |
| #include "SkCanvas.h" |
| #include "SkImage_Base.h" |
| #include "SkSpecialSurface.h" |
| #include "SkSurfacePriv.h" |
| #include "SkPixelRef.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "GrTexture.h" |
| #include "GrTextureParams.h" |
| #include "SkGr.h" |
| #include "SkGrPriv.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 GrTexture* onPeekTexture() const { return nullptr; } |
| |
| virtual SkColorSpace* onGetColorSpace() const = 0; |
| |
| #if SK_SUPPORT_GPU |
| virtual sk_sp<GrTexture> onAsTextureRef(GrContext* context) const = 0; |
| #endif |
| |
| virtual sk_sp<SkSpecialImage> onMakeSubset(const SkIRect& subset) const = 0; |
| |
| virtual sk_sp<SkSpecialSurface> onMakeSurface(const SkImageFilter::OutputProperties& outProps, |
| const SkISize& size, SkAlphaType at) const = 0; |
| |
| virtual sk_sp<SkImage> onMakeTightSubset(const SkIRect& subset) const = 0; |
| |
| virtual sk_sp<SkSurface> 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<const SkSpecialImage_Base*>(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> SkSpecialImage::makeTextureImage(GrContext* context) { |
| #if SK_SUPPORT_GPU |
| if (!context) { |
| return nullptr; |
| } |
| if (GrTexture* peek = as_SIB(this)->onPeekTexture()) { |
| return peek->getContext() == context ? sk_sp<SkSpecialImage>(SkRef(this)) : nullptr; |
| } |
| |
| 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()); |
| } |
| |
| sk_sp<GrTexture> resultTex(GrRefCachedBitmapTexture(context, |
| bmp, |
| GrTextureParams::ClampNoFilter(), |
| SkSourceGammaTreatment::kRespect)); |
| if (!resultTex) { |
| return nullptr; |
| } |
| |
| return SkSpecialImage::MakeFromGpu(SkIRect::MakeWH(resultTex->width(), resultTex->height()), |
| this->uniqueID(), |
| resultTex, 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 { |
| #if SK_SUPPORT_GPU |
| return as_SIB(this)->onPeekTexture() && as_SIB(this)->onPeekTexture()->getContext(); |
| #else |
| return false; |
| #endif |
| } |
| |
| GrContext* SkSpecialImage::getContext() const { |
| #if SK_SUPPORT_GPU |
| GrTexture* texture = as_SIB(this)->onPeekTexture(); |
| |
| if (texture) { |
| return texture->getContext(); |
| } |
| #endif |
| return nullptr; |
| } |
| |
| SkColorSpace* SkSpecialImage::getColorSpace() const { |
| return as_SIB(this)->onGetColorSpace(); |
| } |
| |
| #if SK_SUPPORT_GPU |
| sk_sp<GrTexture> SkSpecialImage::asTextureRef(GrContext* context) const { |
| return as_SIB(this)->onAsTextureRef(context); |
| } |
| #endif |
| |
| sk_sp<SkSpecialSurface> SkSpecialImage::makeSurface(const SkImageFilter::OutputProperties& outProps, |
| const SkISize& size, SkAlphaType at) const { |
| return as_SIB(this)->onMakeSurface(outProps, size, at); |
| } |
| |
| sk_sp<SkSurface> SkSpecialImage::makeTightSurface(const SkImageFilter::OutputProperties& outProps, |
| const SkISize& size, SkAlphaType at) const { |
| return as_SIB(this)->onMakeTightSurface(outProps, size, at); |
| } |
| |
| sk_sp<SkSpecialImage> SkSpecialImage::makeSubset(const SkIRect& subset) const { |
| return as_SIB(this)->onMakeSubset(subset); |
| } |
| |
| sk_sp<SkImage> SkSpecialImage::makeTightSubset(const SkIRect& subset) const { |
| return as_SIB(this)->onMakeTightSubset(subset); |
| } |
| |
| #ifdef SK_DEBUG |
| 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> SkSpecialImage::MakeFromImage(const SkIRect& subset, |
| sk_sp<SkImage> image, |
| const SkSurfaceProps* props) { |
| SkASSERT(rect_fits(subset, image->width(), image->height())); |
| |
| #if SK_SUPPORT_GPU |
| if (GrTexture* texture = as_IB(image)->peekTexture()) { |
| return MakeFromGpu(subset, image->uniqueID(), sk_ref_sp(texture), |
| sk_ref_sp(as_IB(image)->onImageInfo().colorSpace()), 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()); |
| |
| // We have to lock now, while bm is still in scope, since it may have come from our |
| // cache, which means we need to keep it locked until we (the special) are done, since |
| // we cannot re-generate the cache entry (if bm came from a generator). |
| fBitmap.lockPixels(); |
| SkASSERT(fBitmap.getPixels()); |
| } |
| |
| SkAlphaType alphaType() const override { return fBitmap.alphaType(); } |
| |
| size_t getSize() const override { return fBitmap.getSize(); } |
| |
| 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 { |
| *bm = fBitmap; |
| return true; |
| } |
| |
| SkColorSpace* onGetColorSpace() const override { |
| return fBitmap.colorSpace(); |
| } |
| |
| #if SK_SUPPORT_GPU |
| sk_sp<GrTexture> onAsTextureRef(GrContext* context) const override { |
| if (context) { |
| return sk_ref_sp(GrRefCachedBitmapTexture(context, |
| fBitmap, |
| GrTextureParams::ClampNoFilter(), |
| SkSourceGammaTreatment::kRespect)); |
| } |
| |
| return nullptr; |
| } |
| #endif |
| |
| // TODO: The raster implementations of image filters all currently assume that the pixels are |
| // legacy N32. Until they actually check the format and operate on sRGB or F16 data appropriately, |
| // we can't enable this. (They will continue to produce incorrect results, but less-so). |
| #define RASTER_IMAGE_FILTERS_SUPPORT_SRGB_AND_F16 0 |
| |
| sk_sp<SkSpecialSurface> onMakeSurface(const SkImageFilter::OutputProperties& outProps, |
| const SkISize& size, SkAlphaType at) const override { |
| #if RASTER_IMAGE_FILTERS_SUPPORT_SRGB_AND_F16 |
| SkColorSpace* colorSpace = outProps.colorSpace(); |
| #else |
| SkColorSpace* colorSpace = nullptr; |
| #endif |
| SkColorType colorType = colorSpace && colorSpace->gammaIsLinear() |
| ? kRGBA_F16_SkColorType : kN32_SkColorType; |
| SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType, at, |
| sk_ref_sp(colorSpace)); |
| return SkSpecialSurface::MakeRaster(info, nullptr); |
| } |
| |
| sk_sp<SkSpecialImage> onMakeSubset(const SkIRect& subset) const override { |
| SkBitmap subsetBM; |
| |
| if (!fBitmap.extractSubset(&subsetBM, subset)) { |
| return nullptr; |
| } |
| |
| return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(subset.width(), subset.height()), |
| subsetBM, |
| &this->props()); |
| } |
| |
| sk_sp<SkImage> onMakeTightSubset(const SkIRect& subset) const override { |
| SkBitmap subsetBM; |
| |
| if (!fBitmap.extractSubset(&subsetBM, subset)) { |
| return nullptr; |
| } |
| |
| return SkImage::MakeFromBitmap(subsetBM); |
| } |
| |
| sk_sp<SkSurface> onMakeTightSurface(const SkImageFilter::OutputProperties& outProps, |
| const SkISize& size, SkAlphaType at) const override { |
| #if RASTER_IMAGE_FILTERS_SUPPORT_SRGB_AND_F16 |
| SkColorSpace* colorSpace = outProps.colorSpace(); |
| #else |
| SkColorSpace* colorSpace = nullptr; |
| #endif |
| SkColorType colorType = colorSpace && colorSpace->gammaIsLinear() |
| ? kRGBA_F16_SkColorType : kN32_SkColorType; |
| 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> 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 tmpStorage; |
| // ImageFilters only handle N32 at the moment, so force our src to be that |
| if (!valid_for_imagefilters(bm.info())) { |
| if (!bm.copyTo(&tmpStorage, kN32_SkColorType)) { |
| return nullptr; |
| } |
| srcBM = &tmpStorage; |
| } |
| return sk_make_sp<SkSpecialImage_Raster>(subset, *srcBM, props); |
| } |
| |
| #if SK_SUPPORT_GPU |
| /////////////////////////////////////////////////////////////////////////////// |
| #include "GrTexture.h" |
| #include "SkImage_Gpu.h" |
| |
| class SkSpecialImage_Gpu : public SkSpecialImage_Base { |
| public: |
| SkSpecialImage_Gpu(const SkIRect& subset, |
| uint32_t uniqueID, sk_sp<GrTexture> tex, SkAlphaType at, |
| sk_sp<SkColorSpace> colorSpace, const SkSurfaceProps* props) |
| : INHERITED(subset, uniqueID, props) |
| , fTexture(std::move(tex)) |
| , 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 fTexture->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()); |
| |
| auto img = sk_sp<SkImage>(new SkImage_Gpu(fTexture->width(), fTexture->height(), |
| this->uniqueID(), fAlphaType, fTexture.get(), |
| fColorSpace, SkBudgeted::kNo)); |
| |
| canvas->drawImageRect(img, this->subset(), |
| dst, paint, SkCanvas::kStrict_SrcRectConstraint); |
| } |
| |
| GrTexture* onPeekTexture() const override { return fTexture.get(); } |
| |
| sk_sp<GrTexture> onAsTextureRef(GrContext*) const override { return fTexture; } |
| |
| bool onGetROPixels(SkBitmap* dst) const override { |
| if (SkBitmapCache::Find(this->uniqueID(), dst)) { |
| SkASSERT(dst->getGenerationID() == this->uniqueID()); |
| SkASSERT(dst->isImmutable()); |
| SkASSERT(dst->getPixels()); |
| return true; |
| } |
| |
| SkImageInfo info = SkImageInfo::MakeN32(this->width(), this->height(), |
| this->alphaType(), fColorSpace); |
| |
| if (!dst->tryAllocPixels(info)) { |
| return false; |
| } |
| |
| if (!fTexture->readPixels(0, 0, dst->width(), dst->height(), kSkia8888_GrPixelConfig, |
| dst->getPixels(), dst->rowBytes())) { |
| return false; |
| } |
| |
| dst->pixelRef()->setImmutableWithID(this->uniqueID()); |
| SkBitmapCache::Add(this->uniqueID(), *dst); |
| fAddedRasterVersionToCache.store(true); |
| return true; |
| } |
| |
| SkColorSpace* onGetColorSpace() const override { |
| return fColorSpace.get(); |
| } |
| |
| sk_sp<SkSpecialSurface> onMakeSurface(const SkImageFilter::OutputProperties& outProps, |
| const SkISize& size, SkAlphaType at) const override { |
| if (!fTexture->getContext()) { |
| return nullptr; |
| } |
| |
| SkColorSpace* colorSpace = outProps.colorSpace(); |
| return SkSpecialSurface::MakeRenderTarget( |
| fTexture->getContext(), size.width(), size.height(), |
| GrRenderableConfigForColorSpace(colorSpace), sk_ref_sp(colorSpace)); |
| } |
| |
| sk_sp<SkSpecialImage> onMakeSubset(const SkIRect& subset) const override { |
| return SkSpecialImage::MakeFromGpu(subset, |
| this->uniqueID(), |
| fTexture, |
| fColorSpace, |
| &this->props(), |
| fAlphaType); |
| } |
| |
| sk_sp<SkImage> onMakeTightSubset(const SkIRect& subset) const override { |
| if (0 == subset.fLeft && 0 == subset.fTop && |
| fTexture->width() == subset.width() && |
| fTexture->height() == subset.height()) { |
| // The existing GrTexture is already tight so reuse it in the SkImage |
| return sk_make_sp<SkImage_Gpu>(fTexture->width(), fTexture->height(), |
| kNeedNewImageUniqueID, |
| fAlphaType, fTexture.get(), fColorSpace, |
| SkBudgeted::kYes); |
| } |
| |
| GrContext* ctx = fTexture->getContext(); |
| GrSurfaceDesc desc = fTexture->desc(); |
| desc.fWidth = subset.width(); |
| desc.fHeight = subset.height(); |
| |
| sk_sp<GrTexture> subTx(ctx->textureProvider()->createTexture(desc, SkBudgeted::kYes)); |
| if (!subTx) { |
| return nullptr; |
| } |
| ctx->copySurface(subTx.get(), fTexture.get(), subset, SkIPoint::Make(0, 0)); |
| return sk_make_sp<SkImage_Gpu>(desc.fWidth, desc.fHeight, kNeedNewImageUniqueID, |
| fAlphaType, subTx.get(), fColorSpace, SkBudgeted::kYes); |
| } |
| |
| sk_sp<SkSurface> 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)); |
| return SkSurface::MakeRenderTarget(fTexture->getContext(), SkBudgeted::kYes, info); |
| } |
| |
| private: |
| sk_sp<GrTexture> fTexture; |
| const SkAlphaType fAlphaType; |
| sk_sp<SkColorSpace> fColorSpace; |
| mutable SkAtomic<bool> fAddedRasterVersionToCache; |
| |
| typedef SkSpecialImage_Base INHERITED; |
| }; |
| |
| sk_sp<SkSpecialImage> SkSpecialImage::MakeFromGpu(const SkIRect& subset, |
| uint32_t uniqueID, |
| sk_sp<GrTexture> tex, |
| sk_sp<SkColorSpace> colorSpace, |
| const SkSurfaceProps* props, |
| SkAlphaType at) { |
| SkASSERT(rect_fits(subset, tex->width(), tex->height())); |
| return sk_make_sp<SkSpecialImage_Gpu>(subset, uniqueID, std::move(tex), at, |
| std::move(colorSpace), props); |
| } |
| |
| #endif |
