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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 "SkCanvas.h"
#include "SkColorSpaceXformer.h"
#include "SkImageFilterPriv.h"
#include "SkReadBuffer.h"
#include "SkSpecialImage.h"
#include "SkSpecialSurface.h"
#include "SkWriteBuffer.h"
sk_sp<SkImageFilter> SkPaintImageFilter::Make(const SkPaint& paint,
const CropRect* cropRect) {
return sk_sp<SkImageFilter>(new SkPaintImageFilter(paint, cropRect));
}
SkPaintImageFilter::SkPaintImageFilter(const SkPaint& paint, const CropRect* cropRect)
: INHERITED(nullptr, 0, cropRect)
, fPaint(paint) {
}
sk_sp<SkFlattenable> SkPaintImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
SkPaint paint;
buffer.readPaint(&paint);
return SkPaintImageFilter::Make(paint, &common.cropRect());
}
void SkPaintImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writePaint(fPaint);
}
sk_sp<SkSpecialImage> SkPaintImageFilter::onFilterImage(SkSpecialImage* source,
const Context& ctx,
SkIPoint* offset) const {
SkIRect bounds;
const SkIRect srcBounds = SkIRect::MakeWH(source->width(), source->height());
if (!this->applyCropRect(ctx, srcBounds, &bounds)) {
return nullptr;
}
sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), bounds.size()));
if (!surf) {
return nullptr;
}
SkCanvas* canvas = surf->getCanvas();
SkASSERT(canvas);
canvas->clear(0x0);
SkMatrix matrix(ctx.ctm());
matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
SkRect rect = SkRect::MakeIWH(bounds.width(), bounds.height());
SkMatrix inverse;
if (matrix.invert(&inverse)) {
inverse.mapRect(&rect);
}
canvas->setMatrix(matrix);
canvas->drawRect(rect, fPaint);
offset->fX = bounds.fLeft;
offset->fY = bounds.fTop;
return surf->makeImageSnapshot();
}
sk_sp<SkImageFilter> SkPaintImageFilter::onMakeColorSpace(SkColorSpaceXformer* xformer) const {
SkPaint paint = xformer->apply(fPaint);
if (paint != fPaint) {
return SkPaintImageFilter::Make(paint, this->getCropRectIfSet());
}
return this->refMe();
}
bool SkPaintImageFilter::affectsTransparentBlack() const {
return true;
}
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