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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkRectShaderImageFilter.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkFlattenableBuffers.h"
#include "SkShader.h"
#include "SkValidationUtils.h"
SkRectShaderImageFilter* SkRectShaderImageFilter::Create(SkShader* s, const SkRect& rect) {
SkASSERT(s);
return SkNEW_ARGS(SkRectShaderImageFilter, (s, rect));
}
SkRectShaderImageFilter::SkRectShaderImageFilter(SkShader* s, const SkRect& rect)
: INHERITED(NULL)
, fShader(s)
, fRect(rect) {
SkASSERT(s);
s->ref();
}
SkRectShaderImageFilter::SkRectShaderImageFilter(SkFlattenableReadBuffer& buffer)
: INHERITED(buffer) {
fShader = buffer.readFlattenableT<SkShader>();
buffer.readRect(&fRect);
buffer.validate(SkIsValidRect(fRect));
}
void SkRectShaderImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeFlattenable(fShader);
buffer.writeRect(fRect);
}
SkRectShaderImageFilter::~SkRectShaderImageFilter() {
SkSafeUnref(fShader);
}
bool SkRectShaderImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& source,
const SkMatrix&,
SkBitmap* result,
SkIPoint*) {
SkRect rect(fRect);
if (rect.isEmpty()) {
rect = SkRect::MakeWH(SkIntToScalar(source.width()), SkIntToScalar(source.height()));
}
if (rect.isEmpty()) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(SkScalarCeilToInt(rect.width()),
SkScalarCeilToInt(rect.height())));
SkCanvas canvas(device.get());
SkPaint paint;
paint.setShader(fShader);
canvas.drawRect(rect, paint);
*result = device.get()->accessBitmap(false);
return true;
}
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