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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 "SkBitmap.h"
#include "SkComposeImageFilter.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
SkComposeImageFilter::~SkComposeImageFilter() {
}
void SkComposeImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
SkImageFilter* outer = getInput(0);
SkImageFilter* inner = getInput(1);
SkRect tmp;
inner->computeFastBounds(src, &tmp);
outer->computeFastBounds(tmp, dst);
}
bool SkComposeImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& src,
const Context& ctx,
SkBitmap* result,
SkIPoint* offset) const {
SkBitmap tmp;
SkIPoint innerOffset = SkIPoint::Make(0, 0);
SkIPoint outerOffset = SkIPoint::Make(0, 0);
if (!this->filterInput(1, proxy, src, ctx, &tmp, &innerOffset))
return false;
SkMatrix outerMatrix(ctx.ctm());
outerMatrix.postTranslate(SkIntToScalar(-innerOffset.x()), SkIntToScalar(-innerOffset.y()));
SkIRect clipBounds = ctx.clipBounds();
clipBounds.offset(-innerOffset.x(), -innerOffset.y());
Context outerContext(outerMatrix, clipBounds, ctx.cache(), ctx.sizeConstraint());
if (!this->filterInput(0, proxy, tmp, outerContext, result, &outerOffset, false)) {
return false;
}
*offset = innerOffset + outerOffset;
return true;
}
bool SkComposeImageFilter::onFilterBounds(const SkIRect& src,
const SkMatrix& ctm,
SkIRect* dst) const {
SkImageFilter* outer = getInput(0);
SkImageFilter* inner = getInput(1);
SkIRect tmp;
return inner->filterBounds(src, ctm, &tmp) && outer->filterBounds(tmp, ctm, dst);
}
SkFlattenable* SkComposeImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2);
return SkComposeImageFilter::Create(common.getInput(0), common.getInput(1));
}
#ifndef SK_IGNORE_TO_STRING
void SkComposeImageFilter::toString(SkString* str) const {
SkImageFilter* outer = getInput(0);
SkImageFilter* inner = getInput(1);
str->appendf("SkComposeImageFilter: (");
str->appendf("outer: ");
outer->toString(str);
str->appendf("inner: ");
inner->toString(str);
str->appendf(")");
}
#endif
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