| /* |
| * Copyright 2012 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 "SkColorFilterImageFilter.h" |
| |
| #include "SkCanvas.h" |
| #include "SkColorFilter.h" |
| #include "SkReadBuffer.h" |
| #include "SkSpecialImage.h" |
| #include "SkSpecialSurface.h" |
| #include "SkWriteBuffer.h" |
| |
| SkImageFilter* SkColorFilterImageFilter::Create(SkColorFilter* cf, SkImageFilter* input, |
| const CropRect* cropRect) { |
| if (!cf) { |
| return nullptr; |
| } |
| |
| SkColorFilter* inputCF; |
| if (input && input->isColorFilterNode(&inputCF)) { |
| // This is an optimization, as it collapses the hierarchy by just combining the two |
| // colorfilters into a single one, which the new imagefilter will wrap. |
| sk_sp<SkColorFilter> newCF(SkColorFilter::MakeComposeFilter(sk_ref_sp(cf), |
| sk_sp<SkColorFilter>(inputCF))); |
| if (newCF) { |
| return new SkColorFilterImageFilter(newCF.get(), input->getInput(0), cropRect); |
| } |
| } |
| |
| return new SkColorFilterImageFilter(cf, input, cropRect); |
| } |
| |
| SkColorFilterImageFilter::SkColorFilterImageFilter(SkColorFilter* cf, |
| SkImageFilter* input, |
| const CropRect* cropRect) |
| : INHERITED(1, &input, cropRect) |
| , fColorFilter(SkRef(cf)) { |
| } |
| |
| SkFlattenable* SkColorFilterImageFilter::CreateProc(SkReadBuffer& buffer) { |
| SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); |
| sk_sp<SkColorFilter> cf(buffer.readColorFilter()); |
| return Create(cf.get(), common.getInput(0).get(), &common.cropRect()); |
| } |
| |
| void SkColorFilterImageFilter::flatten(SkWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeFlattenable(fColorFilter.get()); |
| } |
| |
| sk_sp<SkSpecialImage> SkColorFilterImageFilter::onFilterImage(SkSpecialImage* source, |
| const Context& ctx, |
| SkIPoint* offset) const { |
| SkIPoint inputOffset = SkIPoint::Make(0, 0); |
| sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset)); |
| if (!input) { |
| return nullptr; |
| } |
| |
| SkIRect bounds; |
| const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.fX, inputOffset.fY, |
| input->width(), input->height()); |
| if (!this->applyCropRect(ctx, inputBounds, &bounds)) { |
| return nullptr; |
| } |
| |
| SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(), kPremul_SkAlphaType); |
| sk_sp<SkSpecialSurface> surf(source->makeSurface(info)); |
| if (!surf) { |
| return nullptr; |
| } |
| |
| SkCanvas* canvas = surf->getCanvas(); |
| SkASSERT(canvas); |
| |
| // TODO: it seems like this clear shouldn't be necessary (see skbug.com/5075) |
| canvas->clear(0x0); |
| |
| SkPaint paint; |
| |
| paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| paint.setColorFilter(fColorFilter); |
| |
| input->draw(canvas, |
| SkIntToScalar(inputOffset.fX - bounds.fLeft), |
| SkIntToScalar(inputOffset.fY - bounds.fTop), |
| &paint); |
| |
| offset->fX = bounds.fLeft; |
| offset->fY = bounds.fTop; |
| return surf->makeImageSnapshot(); |
| } |
| |
| bool SkColorFilterImageFilter::onIsColorFilterNode(SkColorFilter** filter) const { |
| SkASSERT(1 == this->countInputs()); |
| if (!this->cropRectIsSet()) { |
| if (filter) { |
| *filter = SkRef(fColorFilter.get()); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| bool SkColorFilterImageFilter::canComputeFastBounds() const { |
| if (fColorFilter->affectsTransparentBlack()) { |
| return false; |
| } |
| return INHERITED::canComputeFastBounds(); |
| } |
| |
| #ifndef SK_IGNORE_TO_STRING |
| void SkColorFilterImageFilter::toString(SkString* str) const { |
| str->appendf("SkColorFilterImageFilter: ("); |
| |
| str->appendf("input: ("); |
| |
| if (this->getInput(0)) { |
| this->getInput(0)->toString(str); |
| } |
| |
| str->appendf(") color filter: "); |
| fColorFilter->toString(str); |
| |
| str->append(")"); |
| } |
| #endif |