| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkAtomics.h" |
| #include "SkSurface_Base.h" |
| #include "SkImagePriv.h" |
| #include "SkCanvas.h" |
| |
| #include "SkFontLCDConfig.h" |
| static SkPixelGeometry compute_default_geometry() { |
| SkFontLCDConfig::LCDOrder order = SkFontLCDConfig::GetSubpixelOrder(); |
| if (SkFontLCDConfig::kNONE_LCDOrder == order) { |
| return kUnknown_SkPixelGeometry; |
| } else { |
| // Bit0 is RGB(0), BGR(1) |
| // Bit1 is H(0), V(1) |
| const SkPixelGeometry gGeo[] = { |
| kRGB_H_SkPixelGeometry, |
| kBGR_H_SkPixelGeometry, |
| kRGB_V_SkPixelGeometry, |
| kBGR_V_SkPixelGeometry, |
| }; |
| int index = 0; |
| if (SkFontLCDConfig::kBGR_LCDOrder == order) { |
| index |= 1; |
| } |
| if (SkFontLCDConfig::kVertical_LCDOrientation == SkFontLCDConfig::GetSubpixelOrientation()){ |
| index |= 2; |
| } |
| return gGeo[index]; |
| } |
| } |
| |
| SkSurfaceProps::SkSurfaceProps() : fFlags(0), fPixelGeometry(kUnknown_SkPixelGeometry) {} |
| |
| SkSurfaceProps::SkSurfaceProps(InitType) : fFlags(0), fPixelGeometry(compute_default_geometry()) {} |
| |
| SkSurfaceProps::SkSurfaceProps(uint32_t flags, InitType) |
| : fFlags(flags) |
| , fPixelGeometry(compute_default_geometry()) |
| {} |
| |
| SkSurfaceProps::SkSurfaceProps(uint32_t flags, SkPixelGeometry pg) |
| : fFlags(flags), fPixelGeometry(pg) |
| {} |
| |
| SkSurfaceProps::SkSurfaceProps(const SkSurfaceProps& other) |
| : fFlags(other.fFlags) |
| , fPixelGeometry(other.fPixelGeometry) |
| {} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkSurface_Base::SkSurface_Base(int width, int height, const SkSurfaceProps* props) |
| : INHERITED(width, height, props) { |
| } |
| |
| SkSurface_Base::SkSurface_Base(const SkImageInfo& info, const SkSurfaceProps* props) |
| : INHERITED(info, props) { |
| } |
| |
| SkSurface_Base::~SkSurface_Base() { |
| // in case the canvas outsurvives us, we null the callback |
| if (fCachedCanvas) { |
| fCachedCanvas->setSurfaceBase(nullptr); |
| } |
| } |
| |
| void SkSurface_Base::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) { |
| auto image = this->makeImageSnapshot(); |
| if (image) { |
| canvas->drawImage(image, x, y, paint); |
| } |
| } |
| |
| bool SkSurface_Base::outstandingImageSnapshot() const { |
| return fCachedImage && !fCachedImage->unique(); |
| } |
| |
| void SkSurface_Base::aboutToDraw(ContentChangeMode mode) { |
| this->dirtyGenerationID(); |
| |
| SkASSERT(!fCachedCanvas || fCachedCanvas->getSurfaceBase() == this); |
| |
| if (fCachedImage) { |
| // the surface may need to fork its backend, if its sharing it with |
| // the cached image. Note: we only call if there is an outstanding owner |
| // on the image (besides us). |
| bool unique = fCachedImage->unique(); |
| if (!unique) { |
| this->onCopyOnWrite(mode); |
| } |
| |
| // regardless of copy-on-write, we must drop our cached image now, so |
| // that the next request will get our new contents. |
| fCachedImage.reset(); |
| |
| if (unique) { |
| // Our content isn't held by any image now, so we can consider that content mutable. |
| // Raster surfaces need to be told it's safe to consider its pixels mutable again. |
| // We make this call after the ->unref() so the subclass can assert there are no images. |
| this->onRestoreBackingMutability(); |
| } |
| } else if (kDiscard_ContentChangeMode == mode) { |
| this->onDiscard(); |
| } |
| } |
| |
| uint32_t SkSurface_Base::newGenerationID() { |
| SkASSERT(!fCachedCanvas || fCachedCanvas->getSurfaceBase() == this); |
| static int32_t gID; |
| return sk_atomic_inc(&gID) + 1; |
| } |
| |
| static SkSurface_Base* asSB(SkSurface* surface) { |
| return static_cast<SkSurface_Base*>(surface); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkSurface::SkSurface(int width, int height, const SkSurfaceProps* props) |
| : fProps(SkSurfacePropsCopyOrDefault(props)), fWidth(width), fHeight(height) |
| { |
| SkASSERT(fWidth > 0); |
| SkASSERT(fHeight > 0); |
| fGenerationID = 0; |
| } |
| |
| SkSurface::SkSurface(const SkImageInfo& info, const SkSurfaceProps* props) |
| : fProps(SkSurfacePropsCopyOrDefault(props)), fWidth(info.width()), fHeight(info.height()) |
| { |
| SkASSERT(fWidth > 0); |
| SkASSERT(fHeight > 0); |
| fGenerationID = 0; |
| } |
| |
| uint32_t SkSurface::generationID() { |
| if (0 == fGenerationID) { |
| fGenerationID = asSB(this)->newGenerationID(); |
| } |
| return fGenerationID; |
| } |
| |
| void SkSurface::notifyContentWillChange(ContentChangeMode mode) { |
| asSB(this)->aboutToDraw(mode); |
| } |
| |
| SkCanvas* SkSurface::getCanvas() { |
| return asSB(this)->getCachedCanvas(); |
| } |
| |
| sk_sp<SkImage> SkSurface::makeImageSnapshot() { |
| return asSB(this)->refCachedImage(); |
| } |
| |
| sk_sp<SkSurface> SkSurface::makeSurface(const SkImageInfo& info) { |
| return asSB(this)->onNewSurface(info); |
| } |
| |
| void SkSurface::draw(SkCanvas* canvas, SkScalar x, SkScalar y, |
| const SkPaint* paint) { |
| return asSB(this)->onDraw(canvas, x, y, paint); |
| } |
| |
| bool SkSurface::peekPixels(SkPixmap* pmap) { |
| return this->getCanvas()->peekPixels(pmap); |
| } |
| |
| bool SkSurface::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, |
| int srcX, int srcY) { |
| return this->getCanvas()->readPixels(dstInfo, dstPixels, dstRowBytes, srcX, srcY); |
| } |
| |
| GrBackendObject SkSurface::getTextureHandle(BackendHandleAccess access) { |
| return asSB(this)->onGetTextureHandle(access); |
| } |
| |
| bool SkSurface::getRenderTargetHandle(GrBackendObject* obj, BackendHandleAccess access) { |
| return asSB(this)->onGetRenderTargetHandle(obj, access); |
| } |
| |
| void SkSurface::prepareForExternalIO() { |
| this->flush(); |
| } |
| |
| void SkSurface::flush() { |
| asSB(this)->onFlush(0, nullptr); |
| } |
| |
| bool SkSurface::flushAndSignalSemaphores(int numSemaphores, GrBackendSemaphore* signalSemaphores) { |
| return asSB(this)->onFlush(numSemaphores, signalSemaphores); |
| } |
| |
| bool SkSurface::wait(int numSemaphores, const GrBackendSemaphore* waitSemaphores) { |
| return asSB(this)->onWait(numSemaphores, waitSemaphores); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////// |
| #include "SkNoDrawCanvas.h" |
| |
| class SkNullSurface : public SkSurface_Base { |
| public: |
| SkNullSurface(int width, int height) : SkSurface_Base(width, height, nullptr) {} |
| |
| protected: |
| SkCanvas* onNewCanvas() override { |
| return new SkNoDrawCanvas(this->width(), this->height()); |
| } |
| sk_sp<SkSurface> onNewSurface(const SkImageInfo& info) override { |
| return MakeNull(info.width(), info.height()); |
| } |
| sk_sp<SkImage> onNewImageSnapshot() override { return nullptr; } |
| void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*) override {} |
| void onCopyOnWrite(ContentChangeMode) override {} |
| }; |
| |
| sk_sp<SkSurface> SkSurface::MakeNull(int width, int height) { |
| if (width < 1 || height < 1) { |
| return nullptr; |
| } |
| return sk_sp<SkSurface>(new SkNullSurface(width, height)); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if !SK_SUPPORT_GPU |
| |
| sk_sp<SkSurface> SkSurface::MakeRenderTarget(GrContext*, SkBudgeted, const SkImageInfo&, |
| int, GrSurfaceOrigin, const SkSurfaceProps*) { |
| return nullptr; |
| } |
| |
| sk_sp<SkSurface> SkSurface::MakeFromBackendTexture(GrContext*, const GrBackendTexture&, |
| GrSurfaceOrigin origin, int sampleCnt, |
| sk_sp<SkColorSpace>, const SkSurfaceProps*) { |
| return nullptr; |
| } |
| |
| sk_sp<SkSurface> SkSurface::MakeFromBackendRenderTarget(GrContext*, |
| const GrBackendRenderTarget&, |
| GrSurfaceOrigin origin, |
| sk_sp<SkColorSpace>, |
| const SkSurfaceProps*) { |
| return nullptr; |
| } |
| |
| sk_sp<SkSurface> SkSurface::MakeFromBackendTextureAsRenderTarget(GrContext*, |
| const GrBackendTexture&, |
| GrSurfaceOrigin origin, |
| int sampleCnt, |
| sk_sp<SkColorSpace>, |
| const SkSurfaceProps*) { |
| return nullptr; |
| } |
| |
| #endif |