| /* |
| * Copyright 2013 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkXfermodeImageFilter.h" |
| #include "SkArithmeticImageFilter.h" |
| #include "SkArithmeticModePriv.h" |
| #include "SkCanvas.h" |
| #include "SkColorPriv.h" |
| #include "SkReadBuffer.h" |
| #include "SkSpecialImage.h" |
| #include "SkSpecialSurface.h" |
| #include "SkWriteBuffer.h" |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "GrRenderTargetContext.h" |
| #include "GrTextureProxy.h" |
| |
| #include "effects/GrConstColorProcessor.h" |
| #include "effects/GrTextureDomain.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "SkGr.h" |
| #include "SkGrPriv.h" |
| #endif |
| #include "SkClipOpPriv.h" |
| |
| class SkXfermodeImageFilter_Base : public SkImageFilter { |
| public: |
| SkXfermodeImageFilter_Base(SkBlendMode mode, sk_sp<SkImageFilter> inputs[2], |
| const CropRect* cropRect); |
| |
| SK_TO_STRING_OVERRIDE() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter_Base) |
| |
| protected: |
| sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, |
| SkIPoint* offset) const override; |
| |
| #if SK_SUPPORT_GPU |
| sk_sp<SkSpecialImage> filterImageGPU(SkSpecialImage* source, |
| sk_sp<SkSpecialImage> background, |
| const SkIPoint& backgroundOffset, |
| sk_sp<SkSpecialImage> foreground, |
| const SkIPoint& foregroundOffset, |
| const SkIRect& bounds, |
| const OutputProperties& outputProperties) const; |
| #endif |
| |
| void flatten(SkWriteBuffer&) const override; |
| |
| void drawForeground(SkCanvas* canvas, SkSpecialImage*, const SkIRect&) const; |
| #if SK_SUPPORT_GPU |
| sk_sp<GrFragmentProcessor> makeFGFrag(sk_sp<GrFragmentProcessor> bgFP) const; |
| #endif |
| |
| private: |
| static sk_sp<SkFlattenable> LegacyArithmeticCreateProc(SkReadBuffer& buffer); |
| |
| SkBlendMode fMode; |
| |
| friend class SkXfermodeImageFilter; |
| |
| typedef SkImageFilter INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| sk_sp<SkImageFilter> SkXfermodeImageFilter::Make(SkBlendMode mode, |
| sk_sp<SkImageFilter> background, |
| sk_sp<SkImageFilter> foreground, |
| const SkImageFilter::CropRect* cropRect) { |
| sk_sp<SkImageFilter> inputs[2] = { std::move(background), std::move(foreground) }; |
| return sk_sp<SkImageFilter>(new SkXfermodeImageFilter_Base(mode, inputs, cropRect)); |
| } |
| |
| SkXfermodeImageFilter_Base::SkXfermodeImageFilter_Base(SkBlendMode mode, |
| sk_sp<SkImageFilter> inputs[2], |
| const CropRect* cropRect) |
| : INHERITED(inputs, 2, cropRect) |
| , fMode(mode) |
| {} |
| |
| static int unflatten_blendmode(SkReadBuffer& buffer, SkArithmeticParams* arith) { |
| if (buffer.isVersionLT(SkReadBuffer::kXfermodeToBlendMode_Version)) { |
| sk_sp<SkXfermode> xfer = buffer.readXfermode(); |
| if (xfer) { |
| if (xfer->isArithmetic(arith)) { |
| return -1; |
| } |
| return (int)xfer->blend(); |
| } else { |
| return (int)SkBlendMode::kSrcOver; |
| } |
| } else { |
| uint32_t mode = buffer.read32(); |
| (void)buffer.validate(mode <= (unsigned)SkBlendMode::kLastMode); |
| return mode; |
| } |
| } |
| |
| sk_sp<SkFlattenable> SkXfermodeImageFilter_Base::CreateProc(SkReadBuffer& buffer) { |
| SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2); |
| SkArithmeticParams arith; |
| int mode = unflatten_blendmode(buffer, &arith); |
| if (mode >= 0) { |
| return SkXfermodeImageFilter::Make((SkBlendMode)mode, common.getInput(0), |
| common.getInput(1), &common.cropRect()); |
| } else { |
| return SkArithmeticImageFilter::Make(arith.fK[0], arith.fK[1], arith.fK[2], arith.fK[3], |
| arith.fEnforcePMColor, common.getInput(0), |
| common.getInput(1), &common.cropRect()); |
| } |
| } |
| |
| void SkXfermodeImageFilter_Base::flatten(SkWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.write32((unsigned)fMode); |
| } |
| |
| sk_sp<SkSpecialImage> SkXfermodeImageFilter_Base::onFilterImage(SkSpecialImage* source, |
| const Context& ctx, |
| SkIPoint* offset) const { |
| SkIPoint backgroundOffset = SkIPoint::Make(0, 0); |
| sk_sp<SkSpecialImage> background(this->filterInput(0, source, ctx, &backgroundOffset)); |
| |
| SkIPoint foregroundOffset = SkIPoint::Make(0, 0); |
| sk_sp<SkSpecialImage> foreground(this->filterInput(1, source, ctx, &foregroundOffset)); |
| |
| SkIRect foregroundBounds = SkIRect::EmptyIRect(); |
| if (foreground) { |
| foregroundBounds = SkIRect::MakeXYWH(foregroundOffset.x(), foregroundOffset.y(), |
| foreground->width(), foreground->height()); |
| } |
| |
| SkIRect srcBounds = SkIRect::EmptyIRect(); |
| if (background) { |
| srcBounds = SkIRect::MakeXYWH(backgroundOffset.x(), backgroundOffset.y(), |
| background->width(), background->height()); |
| } |
| |
| srcBounds.join(foregroundBounds); |
| if (srcBounds.isEmpty()) { |
| return nullptr; |
| } |
| |
| SkIRect bounds; |
| if (!this->applyCropRect(ctx, srcBounds, &bounds)) { |
| return nullptr; |
| } |
| |
| offset->fX = bounds.left(); |
| offset->fY = bounds.top(); |
| |
| #if SK_SUPPORT_GPU |
| if (source->isTextureBacked()) { |
| return this->filterImageGPU(source, |
| background, backgroundOffset, |
| foreground, foregroundOffset, |
| bounds, ctx.outputProperties()); |
| } |
| #endif |
| |
| sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), bounds.size())); |
| if (!surf) { |
| return nullptr; |
| } |
| |
| SkCanvas* canvas = surf->getCanvas(); |
| SkASSERT(canvas); |
| |
| canvas->clear(0x0); // can't count on background to fully clear the background |
| canvas->translate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); |
| |
| if (background) { |
| SkPaint paint; |
| paint.setBlendMode(SkBlendMode::kSrc); |
| background->draw(canvas, |
| SkIntToScalar(backgroundOffset.fX), SkIntToScalar(backgroundOffset.fY), |
| &paint); |
| } |
| |
| this->drawForeground(canvas, foreground.get(), foregroundBounds); |
| |
| return surf->makeImageSnapshot(); |
| } |
| |
| void SkXfermodeImageFilter_Base::drawForeground(SkCanvas* canvas, SkSpecialImage* img, |
| const SkIRect& fgBounds) const { |
| SkPaint paint; |
| paint.setBlendMode(fMode); |
| if (img) { |
| img->draw(canvas, SkIntToScalar(fgBounds.fLeft), SkIntToScalar(fgBounds.fTop), &paint); |
| } |
| |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->clipRect(SkRect::Make(fgBounds), kDifference_SkClipOp); |
| paint.setColor(0); |
| canvas->drawPaint(paint); |
| } |
| |
| #ifndef SK_IGNORE_TO_STRING |
| void SkXfermodeImageFilter_Base::toString(SkString* str) const { |
| str->appendf("SkXfermodeImageFilter: ("); |
| str->appendf("blendmode: (%d)", (int)fMode); |
| if (this->getInput(0)) { |
| str->appendf("foreground: ("); |
| this->getInput(0)->toString(str); |
| str->appendf(")"); |
| } |
| if (this->getInput(1)) { |
| str->appendf("background: ("); |
| this->getInput(1)->toString(str); |
| str->appendf(")"); |
| } |
| str->append(")"); |
| } |
| #endif |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "SkXfermode_proccoeff.h" |
| |
| sk_sp<SkSpecialImage> SkXfermodeImageFilter_Base::filterImageGPU( |
| SkSpecialImage* source, |
| sk_sp<SkSpecialImage> background, |
| const SkIPoint& backgroundOffset, |
| sk_sp<SkSpecialImage> foreground, |
| const SkIPoint& foregroundOffset, |
| const SkIRect& bounds, |
| const OutputProperties& outputProperties) const { |
| SkASSERT(source->isTextureBacked()); |
| |
| GrContext* context = source->getContext(); |
| |
| sk_sp<GrTexture> backgroundTex, foregroundTex; |
| |
| if (background) { |
| backgroundTex = background->asTextureRef(context); |
| } |
| |
| if (foreground) { |
| foregroundTex = foreground->asTextureRef(context); |
| } |
| |
| GrPaint paint; |
| sk_sp<GrFragmentProcessor> bgFP; |
| |
| if (backgroundTex) { |
| SkMatrix backgroundMatrix; |
| backgroundMatrix.setIDiv(backgroundTex->width(), backgroundTex->height()); |
| backgroundMatrix.preTranslate(-SkIntToScalar(backgroundOffset.fX), |
| -SkIntToScalar(backgroundOffset.fY)); |
| sk_sp<GrColorSpaceXform> bgXform = GrColorSpaceXform::Make(background->getColorSpace(), |
| outputProperties.colorSpace()); |
| bgFP = GrTextureDomainEffect::Make( |
| backgroundTex.get(), std::move(bgXform), backgroundMatrix, |
| GrTextureDomain::MakeTexelDomain(background->subset()), |
| GrTextureDomain::kDecal_Mode, |
| GrSamplerParams::kNone_FilterMode); |
| } else { |
| bgFP = GrConstColorProcessor::Make(GrColor4f::TransparentBlack(), |
| GrConstColorProcessor::kIgnore_InputMode); |
| } |
| |
| if (foregroundTex) { |
| SkMatrix foregroundMatrix; |
| foregroundMatrix.setIDiv(foregroundTex->width(), foregroundTex->height()); |
| foregroundMatrix.preTranslate(-SkIntToScalar(foregroundOffset.fX), |
| -SkIntToScalar(foregroundOffset.fY)); |
| sk_sp<GrColorSpaceXform> fgXform = GrColorSpaceXform::Make(foreground->getColorSpace(), |
| outputProperties.colorSpace()); |
| sk_sp<GrFragmentProcessor> foregroundFP; |
| |
| foregroundFP = GrTextureDomainEffect::Make( |
| foregroundTex.get(), std::move(fgXform), foregroundMatrix, |
| GrTextureDomain::MakeTexelDomain(foreground->subset()), |
| GrTextureDomain::kDecal_Mode, |
| GrSamplerParams::kNone_FilterMode); |
| |
| paint.addColorFragmentProcessor(std::move(foregroundFP)); |
| |
| sk_sp<GrFragmentProcessor> xferFP = this->makeFGFrag(bgFP); |
| |
| // A null 'xferFP' here means kSrc_Mode was used in which case we can just proceed |
| if (xferFP) { |
| paint.addColorFragmentProcessor(std::move(xferFP)); |
| } |
| } else { |
| paint.addColorFragmentProcessor(std::move(bgFP)); |
| } |
| |
| paint.setPorterDuffXPFactory(SkBlendMode::kSrc); |
| |
| sk_sp<GrRenderTargetContext> renderTargetContext(context->makeDeferredRenderTargetContext( |
| SkBackingFit::kApprox, bounds.width(), bounds.height(), |
| GrRenderableConfigForColorSpace(outputProperties.colorSpace()), |
| sk_ref_sp(outputProperties.colorSpace()))); |
| if (!renderTargetContext) { |
| return nullptr; |
| } |
| paint.setGammaCorrect(renderTargetContext->isGammaCorrect()); |
| |
| SkMatrix matrix; |
| matrix.setTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); |
| renderTargetContext->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, matrix, |
| SkRect::Make(bounds)); |
| |
| return SkSpecialImage::MakeDeferredFromGpu(context, |
| SkIRect::MakeWH(bounds.width(), bounds.height()), |
| kNeedNewImageUniqueID_SpecialImage, |
| sk_ref_sp(renderTargetContext->asDeferredTexture()), |
| renderTargetContext->refColorSpace()); |
| } |
| |
| sk_sp<GrFragmentProcessor> |
| SkXfermodeImageFilter_Base::makeFGFrag(sk_sp<GrFragmentProcessor> bgFP) const { |
| // A null fMode is interpreted to mean kSrcOver_Mode (to match raster). |
| SkXfermode* xfer = SkXfermode::Peek(fMode); |
| sk_sp<SkXfermode> srcover; |
| if (!xfer) { |
| // It would be awesome to use SkXfermode::Create here but it knows better |
| // than us and won't return a kSrcOver_Mode SkXfermode. That means we |
| // have to get one the hard way. |
| struct ProcCoeff rec; |
| rec.fProc = SkXfermode::GetProc(SkBlendMode::kSrcOver); |
| SkXfermode::ModeAsCoeff(SkBlendMode::kSrcOver, &rec.fSC, &rec.fDC); |
| |
| srcover.reset(new SkProcCoeffXfermode(rec, SkBlendMode::kSrcOver)); |
| xfer = srcover.get(); |
| |
| } |
| return xfer->makeFragmentProcessorForImageFilter(std::move(bgFP)); |
| } |
| |
| #endif |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| sk_sp<SkFlattenable> SkXfermodeImageFilter_Base::LegacyArithmeticCreateProc(SkReadBuffer& buffer) { |
| SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2); |
| // skip the unused mode (srcover) field |
| SkDEBUGCODE(int mode =) unflatten_blendmode(buffer, nullptr); |
| if (!buffer.isValid()) { |
| return nullptr; |
| } |
| SkASSERT(SkBlendMode::kSrcOver == (SkBlendMode)mode); |
| float k[4]; |
| for (int i = 0; i < 4; ++i) { |
| k[i] = buffer.readScalar(); |
| } |
| const bool enforcePMColor = buffer.readBool(); |
| return SkArithmeticImageFilter::Make(k[0], k[1], k[2], k[3], enforcePMColor, common.getInput(0), |
| common.getInput(1), &common.cropRect()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermodeImageFilter) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkXfermodeImageFilter_Base) |
| // manually register the legacy serialized name "SkXfermodeImageFilter" |
| SkFlattenable::Register("SkXfermodeImageFilter", SkXfermodeImageFilter_Base::CreateProc, |
| SkFlattenable::kSkImageFilter_Type); |
| // manually register the legacy serialized name "SkArithmeticImageFilter" from when that filter |
| // was implemented as a xfermode image filter. |
| SkFlattenable::Register("SkArithmeticImageFilter", |
| SkXfermodeImageFilter_Base::LegacyArithmeticCreateProc, |
| SkFlattenable::kSkImageFilter_Type); |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
