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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 "SkImageFilter.h"
#include "SkBitmap.h"
#include "SkFlattenableBuffers.h"
#include "SkRect.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrTexture.h"
#include "SkImageFilterUtils.h"
#endif
SK_DEFINE_INST_COUNT(SkImageFilter)
SkImageFilter::SkImageFilter(int inputCount, SkImageFilter** inputs)
: fInputCount(inputCount), fInputs(new SkImageFilter*[inputCount]) {
for (int i = 0; i < inputCount; ++i) {
fInputs[i] = inputs[i];
SkSafeRef(fInputs[i]);
}
}
SkImageFilter::SkImageFilter(SkImageFilter* input)
: fInputCount(1), fInputs(new SkImageFilter*[1]) {
fInputs[0] = input;
SkSafeRef(fInputs[0]);
}
SkImageFilter::SkImageFilter(SkImageFilter* input1, SkImageFilter* input2)
: fInputCount(2), fInputs(new SkImageFilter*[2]) {
fInputs[0] = input1;
fInputs[1] = input2;
SkSafeRef(fInputs[0]);
SkSafeRef(fInputs[1]);
}
SkImageFilter::~SkImageFilter() {
for (int i = 0; i < fInputCount; i++) {
SkSafeUnref(fInputs[i]);
}
delete[] fInputs;
}
SkImageFilter::SkImageFilter(SkFlattenableReadBuffer& buffer)
: fInputCount(buffer.readInt()), fInputs(new SkImageFilter*[fInputCount]) {
for (int i = 0; i < fInputCount; i++) {
if (buffer.readBool()) {
fInputs[i] = static_cast<SkImageFilter*>(buffer.readFlattenable());
} else {
fInputs[i] = NULL;
}
}
}
void SkImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
buffer.writeInt(fInputCount);
for (int i = 0; i < fInputCount; i++) {
SkImageFilter* input = getInput(i);
buffer.writeBool(input != NULL);
if (input != NULL) {
buffer.writeFlattenable(input);
}
}
}
bool SkImageFilter::filterImage(Proxy* proxy, const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* result, SkIPoint* loc) {
SkASSERT(result);
SkASSERT(loc);
/*
* Give the proxy first shot at the filter. If it returns false, ask
* the filter to do it.
*/
return (proxy && proxy->filterImage(this, src, ctm, result, loc)) ||
this->onFilterImage(proxy, src, ctm, result, loc);
}
bool SkImageFilter::filterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) {
SkASSERT(&src);
SkASSERT(dst);
return this->onFilterBounds(src, ctm, dst);
}
bool SkImageFilter::onFilterImage(Proxy*, const SkBitmap&, const SkMatrix&,
SkBitmap*, SkIPoint*) {
return false;
}
bool SkImageFilter::canFilterImageGPU() const {
return this->asNewEffect(NULL, NULL);
}
bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, SkBitmap* result) {
#if SK_SUPPORT_GPU
SkBitmap input;
SkASSERT(fInputCount == 1);
if (!SkImageFilterUtils::GetInputResultGPU(this->getInput(0), proxy, src, &input)) {
return false;
}
GrTexture* srcTexture = (GrTexture*) input.getTexture();
SkRect rect;
src.getBounds(&rect);
GrContext* context = srcTexture->getContext();
GrTextureDesc desc;
desc.fFlags = kRenderTarget_GrTextureFlagBit,
desc.fWidth = input.width();
desc.fHeight = input.height();
desc.fConfig = kRGBA_8888_GrPixelConfig;
GrAutoScratchTexture dst(context, desc);
GrContext::AutoMatrix am;
am.setIdentity(context);
GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget());
GrContext::AutoClip acs(context, rect);
GrEffectRef* effect;
this->asNewEffect(&effect, srcTexture);
SkASSERT(effect);
SkAutoUnref effectRef(effect);
GrPaint paint;
paint.colorStage(0)->setEffect(effect);
context->drawRect(paint, rect);
SkAutoTUnref<GrTexture> resultTex(dst.detach());
SkImageFilterUtils::WrapTexture(resultTex, input.width(), input.height(), result);
return true;
#else
return false;
#endif
}
bool SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) {
*dst = src;
return true;
}
bool SkImageFilter::asNewEffect(GrEffectRef**, GrTexture*) const {
return false;
}
bool SkImageFilter::asColorFilter(SkColorFilter**) const {
return false;
}
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