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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"
#include "stdarg.h"
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(int inputCount, ...)
: fInputCount(inputCount), fInputs(new SkImageFilter*[inputCount]) {
va_list ap;
va_start(ap, inputCount);
for (int i = 0; i < inputCount; ++i) {
fInputs[i] = va_arg(ap, SkImageFilter*);
SkSafeRef(fInputs[i]);
}
va_end(ap);
}
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);
}
}
}
SkBitmap SkImageFilter::getInputResult(int index, Proxy* proxy,
const SkBitmap& src, const SkMatrix& ctm,
SkIPoint* loc) {
SkASSERT(index < fInputCount);
SkImageFilter* input = getInput(index);
SkBitmap result;
if (input && input->filterImage(proxy, src, ctm, &result, loc)) {
return result;
} else {
return src;
}
}
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 false;
}
GrTexture* SkImageFilter::onFilterImageGPU(Proxy* proxy, GrTexture* texture, const SkRect& rect) {
return NULL;
}
bool SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) {
*dst = src;
return true;
}
bool SkImageFilter::asNewCustomStage(GrCustomStage**, GrTexture*) const {
return false;
}
SkColorFilter* SkImageFilter::asColorFilter() const {
return NULL;
}
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