| /* |
| * 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 "src/core/SkSpecialImage.h" |
| |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkImage.h" |
| #include "src/core/SkSpecialSurface.h" |
| #include "src/core/SkSurfacePriv.h" |
| #include "src/image/SkImage_Base.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "include/gpu/GrDirectContext.h" |
| #include "include/gpu/GrRecordingContext.h" |
| #include "src/gpu/GrImageInfo.h" |
| #include "src/gpu/GrProxyProvider.h" |
| #include "src/gpu/GrRecordingContextPriv.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 GrSurfaceProxyView onView(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<SkSpecialImage> onMakeSubset(const SkIRect& subset) const = 0; |
| |
| virtual sk_sp<SkSpecialSurface> onMakeSurface( |
| SkColorType colorType, const SkColorSpace* colorSpace, 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<SkImage> onAsImage(const SkIRect* subset) const = 0; |
| |
| virtual sk_sp<SkSurface> onMakeTightSurface( |
| SkColorType colorType, const SkColorSpace* colorSpace, |
| 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) { |
| } |
| |
| 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 |
| GrSurfaceProxyView SkSpecialImage::view(GrRecordingContext* context) const { |
| return as_SIB(this)->onView(context); |
| } |
| #endif |
| |
| sk_sp<SkSpecialSurface> SkSpecialImage::makeSurface( |
| SkColorType colorType, const SkColorSpace* colorSpace, const SkISize& size, |
| SkAlphaType at, const SkSurfaceProps* props) const { |
| return as_SIB(this)->onMakeSurface(colorType, colorSpace, size, at, props); |
| } |
| |
| sk_sp<SkSurface> SkSpecialImage::makeTightSurface( |
| SkColorType colorType, const SkColorSpace* colorSpace, const SkISize& size, |
| SkAlphaType at) const { |
| return as_SIB(this)->onMakeTightSurface(colorType, colorSpace, size, at); |
| } |
| |
| sk_sp<SkSpecialImage> SkSpecialImage::makeSubset(const SkIRect& subset) const { |
| SkIRect absolute = subset.makeOffset(this->subset().topLeft()); |
| return as_SIB(this)->onMakeSubset(absolute); |
| } |
| |
| sk_sp<SkImage> SkSpecialImage::asImage(const SkIRect* subset) const { |
| if (subset) { |
| SkIRect absolute = subset->makeOffset(this->subset().topLeft()); |
| 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> SkSpecialImage::MakeFromImage(GrRecordingContext* context, |
| const SkIRect& subset, |
| sk_sp<SkImage> image, |
| const SkSurfaceProps* props) { |
| SkASSERT(rect_fits(subset, image->width(), image->height())); |
| |
| #if SK_SUPPORT_GPU |
| if (context) { |
| GrSurfaceProxyView view = as_IB(image)->refView(context, GrMipmapped::kNo); |
| return MakeDeferredFromGpu(context, subset, image->uniqueID(), view, |
| SkColorTypeToGrColorType(image->colorType()), |
| image->refColorSpace(), props); |
| } |
| #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(); } |
| |
| SkColorType colorType() const override { return fBitmap.colorType(); } |
| |
| 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 |
| GrSurfaceProxyView onView(GrRecordingContext* context) const override { |
| if (context) { |
| return GrMakeCachedBitmapProxyView(context, fBitmap); |
| } |
| |
| return {}; |
| } |
| #endif |
| |
| sk_sp<SkSpecialSurface> onMakeSurface(SkColorType colorType, const SkColorSpace* colorSpace, |
| const SkISize& size, SkAlphaType at, |
| const SkSurfaceProps* props) const override { |
| // Ignore the requested color type, the raster backend currently only supports N32 |
| colorType = kN32_SkColorType; // TODO: find ways to allow f16 |
| SkImageInfo info = SkImageInfo::Make(size, colorType, at, sk_ref_sp(colorSpace)); |
| return SkSpecialSurface::MakeRaster(info, props); |
| } |
| |
| sk_sp<SkSpecialImage> 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<SkImage> 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<SkSurface> onMakeTightSurface(SkColorType colorType, const SkColorSpace* colorSpace, |
| const SkISize& size, SkAlphaType at) const override { |
| // Ignore the requested color type, the raster backend currently only supports N32 |
| colorType = kN32_SkColorType; // TODO: find ways to allow f16 |
| SkImageInfo info = SkImageInfo::Make(size, 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 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<SkSpecialImage_Raster>(subset, *srcBM, props); |
| } |
| |
| sk_sp<SkSpecialImage> 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().makeDimensions(subset.size()); |
| // 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<SkSpecialImage_Raster>( |
| SkIRect::MakeWH(subset.width(), subset.height()), tmp, props); |
| } |
| |
| #if SK_SUPPORT_GPU |
| /////////////////////////////////////////////////////////////////////////////// |
| static sk_sp<SkImage> wrap_proxy_in_image(GrRecordingContext* context, GrSurfaceProxyView view, |
| SkColorType colorType, SkAlphaType alphaType, |
| sk_sp<SkColorSpace> colorSpace) { |
| // CONTEXT TODO: remove this use of 'backdoor' to create an SkImage |
| return sk_make_sp<SkImage_Gpu>(sk_ref_sp(context->priv().backdoor()), |
| kNeedNewImageUniqueID, std::move(view), colorType, alphaType, |
| std::move(colorSpace)); |
| } |
| |
| class SkSpecialImage_Gpu : public SkSpecialImage_Base { |
| public: |
| SkSpecialImage_Gpu(GrRecordingContext* context, const SkIRect& subset, |
| uint32_t uniqueID, GrSurfaceProxyView view, GrColorType ct, |
| SkAlphaType at, sk_sp<SkColorSpace> colorSpace, const SkSurfaceProps* props) |
| : INHERITED(subset, uniqueID, props) |
| , fContext(context) |
| , fView(std::move(view)) |
| , fColorType(ct) |
| , fAlphaType(at) |
| , fColorSpace(std::move(colorSpace)) { |
| } |
| |
| SkAlphaType alphaType() const override { return fAlphaType; } |
| |
| SkColorType colorType() const override { return GrColorTypeToSkColorType(fColorType); } |
| |
| size_t getSize() const override { |
| return fView.proxy()->gpuMemorySize(*fContext->priv().caps()); |
| } |
| |
| 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<SkImage> img = |
| sk_sp<SkImage>(new SkImage_Gpu(sk_ref_sp(canvas->getGrContext()), this->uniqueID(), |
| fView, this->colorType(), fAlphaType, fColorSpace)); |
| |
| canvas->drawImageRect(img, this->subset(), |
| dst, paint, SkCanvas::kStrict_SrcRectConstraint); |
| } |
| |
| GrRecordingContext* onGetContext() const override { return fContext; } |
| |
| GrSurfaceProxyView onView(GrRecordingContext* context) const override { return fView; } |
| |
| bool onGetROPixels(SkBitmap* dst) const override { |
| // This should never be called: All GPU image filters are implemented entirely on the GPU, |
| // so we never perform read-back. |
| SkASSERT(false); |
| return false; |
| } |
| |
| SkColorSpace* onGetColorSpace() const override { |
| return fColorSpace.get(); |
| } |
| |
| sk_sp<SkSpecialSurface> onMakeSurface(SkColorType colorType, const SkColorSpace* colorSpace, |
| const SkISize& size, SkAlphaType at, |
| const SkSurfaceProps* props) const override { |
| if (!fContext) { |
| return nullptr; |
| } |
| |
| return SkSpecialSurface::MakeRenderTarget(fContext, size.width(), size.height(), |
| SkColorTypeToGrColorType(colorType), |
| sk_ref_sp(colorSpace), props); |
| } |
| |
| sk_sp<SkSpecialImage> onMakeSubset(const SkIRect& subset) const override { |
| return SkSpecialImage::MakeDeferredFromGpu(fContext, |
| subset, |
| this->uniqueID(), |
| fView, |
| fColorType, |
| fColorSpace, |
| &this->props(), |
| fAlphaType); |
| } |
| |
| sk_sp<SkImage> onAsImage(const SkIRect* subset) const override { |
| GrSurfaceProxy* proxy = fView.proxy(); |
| if (subset) { |
| if (proxy->isFunctionallyExact() && *subset == SkIRect::MakeSize(proxy->dimensions())) { |
| proxy->priv().exactify(false); |
| // The existing GrTexture is already tight so reuse it in the SkImage |
| return wrap_proxy_in_image(fContext, fView, this->colorType(), fAlphaType, |
| fColorSpace); |
| } |
| |
| auto subsetView = GrSurfaceProxyView::Copy(fContext, fView, GrMipmapped::kNo, *subset, |
| SkBackingFit::kExact, SkBudgeted::kYes); |
| if (!subsetView) { |
| return nullptr; |
| } |
| SkASSERT(subsetView.asTextureProxy()); |
| SkASSERT(subsetView.proxy()->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(subsetView), this->colorType(), |
| fAlphaType, fColorSpace); |
| } |
| |
| proxy->priv().exactify(true); |
| |
| return wrap_proxy_in_image(fContext, fView, this->colorType(), fAlphaType, fColorSpace); |
| } |
| |
| sk_sp<SkSurface> onMakeTightSurface(SkColorType colorType, const SkColorSpace* colorSpace, |
| const SkISize& size, SkAlphaType at) const override { |
| // TODO (michaelludwig): Why does this ignore colorType but onMakeSurface doesn't ignore it? |
| // Once makeTightSurface() goes away, should this type overriding behavior be moved into |
| // onMakeSurface() or is this unnecessary? |
| colorType = colorSpace && colorSpace->gammaIsLinear() |
| ? kRGBA_F16_SkColorType : kRGBA_8888_SkColorType; |
| SkImageInfo info = SkImageInfo::Make(size, 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; |
| GrSurfaceProxyView fView; |
| const GrColorType fColorType; |
| const SkAlphaType fAlphaType; |
| sk_sp<SkColorSpace> fColorSpace; |
| |
| typedef SkSpecialImage_Base INHERITED; |
| }; |
| |
| sk_sp<SkSpecialImage> SkSpecialImage::MakeDeferredFromGpu(GrRecordingContext* context, |
| const SkIRect& subset, |
| uint32_t uniqueID, |
| GrSurfaceProxyView view, |
| GrColorType colorType, |
| sk_sp<SkColorSpace> colorSpace, |
| const SkSurfaceProps* props, |
| SkAlphaType at) { |
| if (!context || context->abandoned() || !view.asTextureProxy()) { |
| return nullptr; |
| } |
| SkASSERT_RELEASE(rect_fits(subset, view.proxy()->width(), view.proxy()->height())); |
| return sk_make_sp<SkSpecialImage_Gpu>(context, subset, uniqueID, std::move(view), colorType, |
| at, std::move(colorSpace), props); |
| } |
| #endif |
