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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkPaintImageFilter.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
SkImageFilter* SkPaintImageFilter::Create(const SkPaint& paint, const CropRect* cropRect) {
return new SkPaintImageFilter(paint, cropRect);
}
SkPaintImageFilter::SkPaintImageFilter(const SkPaint& paint, const CropRect* cropRect)
: INHERITED(0, nullptr, cropRect)
, fPaint(paint) {
}
SkFlattenable* SkPaintImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
SkPaint paint;
buffer.readPaint(&paint);
return Create(paint, &common.cropRect());
}
void SkPaintImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writePaint(fPaint);
}
bool SkPaintImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& source,
const Context& ctx,
SkBitmap* result,
SkIPoint* offset) const {
SkIRect bounds;
if (!this->applyCropRect(ctx, source.bounds(), &bounds)) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(),
bounds.height()));
if (nullptr == device.get()) {
return false;
}
SkCanvas canvas(device.get());
SkMatrix matrix(ctx.ctm());
matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
SkRect rect = SkRect::MakeWH(SkIntToScalar(bounds.width()), SkIntToScalar(bounds.height()));
SkMatrix inverse;
if (matrix.invert(&inverse)) {
inverse.mapRect(&rect);
}
canvas.setMatrix(matrix);
canvas.drawRect(rect, fPaint);
*result = device.get()->accessBitmap(false);
offset->fX = bounds.fLeft;
offset->fY = bounds.fTop;
return true;
}
bool SkPaintImageFilter::canComputeFastBounds() const {
// http:skbug.com/4627: "make computeFastBounds and onFilterBounds() CropRect-aware"
// computeFastBounds() doesn't currently take the crop rect into account,
// so we can't compute it. If a full crop rect is set, we should return true here.
return false;
}
#ifndef SK_IGNORE_TO_STRING
void SkPaintImageFilter::toString(SkString* str) const {
str->appendf("SkPaintImageFilter: (");
str->append(")");
}
#endif
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