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/*
* 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 "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColorMatrixFilter.h"
#include "SkDevice.h"
#include "SkColorFilter.h"
#include "SkReadBuffer.h"
#include "SkTableColorFilter.h"
#include "SkWriteBuffer.h"
SkImageFilter* SkColorFilterImageFilter::Create(SkColorFilter* cf, SkImageFilter* input,
const CropRect* cropRect) {
if (nullptr == 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.
SkAutoUnref autoUnref(inputCF);
SkAutoTUnref<SkColorFilter> newCF(SkColorFilter::CreateComposeFilter(cf, inputCF));
if (newCF) {
return new SkColorFilterImageFilter(newCF, 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);
SkAutoTUnref<SkColorFilter> cf(buffer.readColorFilter());
return Create(cf, common.getInput(0), &common.cropRect());
}
void SkColorFilterImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeFlattenable(fColorFilter);
}
SkColorFilterImageFilter::~SkColorFilterImageFilter() {
fColorFilter->unref();
}
bool SkColorFilterImageFilter::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& source,
const Context& ctx,
SkBitmap* result,
SkIPoint* offset) const {
SkBitmap src = source;
SkIPoint srcOffset = SkIPoint::Make(0, 0);
if (!this->filterInputDeprecated(0, proxy, source, ctx, &src, &srcOffset)) {
return false;
}
SkIRect bounds;
SkIRect srcBounds = src.bounds();
srcBounds.offset(srcOffset);
if (!this->applyCropRect(ctx, srcBounds, &bounds)) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
if (nullptr == device.get()) {
return false;
}
SkCanvas canvas(device.get());
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
paint.setColorFilter(fColorFilter);
canvas.drawBitmap(src, SkIntToScalar(srcOffset.fX - bounds.fLeft),
SkIntToScalar(srcOffset.fY - bounds.fTop), &paint);
*result = device.get()->accessBitmap(false);
offset->fX = bounds.fLeft;
offset->fY = bounds.fTop;
return true;
}
bool SkColorFilterImageFilter::onIsColorFilterNode(SkColorFilter** filter) const {
SkASSERT(1 == this->countInputs());
if (!this->cropRectIsSet()) {
if (filter) {
*filter = SkRef(fColorFilter);
}
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
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