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/*
* Copyright 2013 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 "SkPictureImageFilter.h"
#include "SkDevice.h"
#include "SkCanvas.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkValidationUtils.h"
SkPictureImageFilter::SkPictureImageFilter(const SkPicture* picture)
: INHERITED(0, 0),
fPicture(picture),
fCropRect(SkRect::MakeWH(picture ? SkIntToScalar(picture->width()) : 0,
picture ? SkIntToScalar(picture->height()) : 0)) {
SkSafeRef(fPicture);
}
SkPictureImageFilter::SkPictureImageFilter(const SkPicture* picture, const SkRect& cropRect)
: INHERITED(0, 0),
fPicture(picture),
fCropRect(cropRect) {
SkSafeRef(fPicture);
}
SkPictureImageFilter::~SkPictureImageFilter() {
SkSafeUnref(fPicture);
}
SkPictureImageFilter::SkPictureImageFilter(SkReadBuffer& buffer)
: INHERITED(0, buffer),
fPicture(NULL) {
if (!buffer.isCrossProcess()) {
if (buffer.readBool()) {
fPicture = SkPicture::CreateFromBuffer(buffer);
}
} else {
buffer.validate(!buffer.readBool());
}
buffer.readRect(&fCropRect);
}
void SkPictureImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
if (!buffer.isCrossProcess()) {
bool hasPicture = (fPicture != NULL);
buffer.writeBool(hasPicture);
if (hasPicture) {
fPicture->flatten(buffer);
}
} else {
buffer.writeBool(false);
}
buffer.writeRect(fCropRect);
}
bool SkPictureImageFilter::onFilterImage(Proxy* proxy, const SkBitmap&, const Context& ctx,
SkBitmap* result, SkIPoint* offset) const {
if (!fPicture) {
offset->fX = offset->fY = 0;
return true;
}
SkRect floatBounds;
SkIRect bounds;
ctx.ctm().mapRect(&floatBounds, fCropRect);
floatBounds.roundOut(&bounds);
if (!bounds.intersect(ctx.clipBounds())) {
return false;
}
if (bounds.isEmpty()) {
offset->fX = offset->fY = 0;
return true;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
if (NULL == device.get()) {
return false;
}
SkCanvas canvas(device.get());
SkPaint paint;
canvas.translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop));
canvas.concat(ctx.ctm());
canvas.drawPicture(fPicture);
*result = device.get()->accessBitmap(false);
offset->fX = bounds.fLeft;
offset->fY = bounds.fTop;
return true;
}
bool SkPictureImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) const {
*dst = src;
return true;
}
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