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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 "SkCanvas.h"
#include "SkColorSpaceXformCanvas.h"
#include "SkColorSpaceXformer.h"
#include "SkFlattenablePriv.h"
#include "SkImageSource.h"
#include "SkPicturePriv.h"
#include "SkReadBuffer.h"
#include "SkSpecialImage.h"
#include "SkSpecialSurface.h"
#include "SkWriteBuffer.h"
#include "SkValidationUtils.h"
sk_sp<SkImageFilter> SkPictureImageFilter::Make(sk_sp<SkPicture> picture) {
return sk_sp<SkImageFilter>(new SkPictureImageFilter(std::move(picture)));
}
sk_sp<SkImageFilter> SkPictureImageFilter::Make(sk_sp<SkPicture> picture,
const SkRect& cropRect) {
return sk_sp<SkImageFilter>(new SkPictureImageFilter(std::move(picture), cropRect, nullptr));
}
SkPictureImageFilter::SkPictureImageFilter(sk_sp<SkPicture> picture)
: INHERITED(nullptr, 0, nullptr)
, fPicture(std::move(picture))
, fCropRect(fPicture ? fPicture->cullRect() : SkRect::MakeEmpty()) {
}
SkPictureImageFilter::SkPictureImageFilter(sk_sp<SkPicture> picture, const SkRect& cropRect,
sk_sp<SkColorSpace> colorSpace)
: INHERITED(nullptr, 0, nullptr)
, fPicture(std::move(picture))
, fCropRect(cropRect)
, fColorSpace(std::move(colorSpace)) {
}
enum PictureResolution {
kDeviceSpace_PictureResolution,
kLocalSpace_PictureResolution
};
static sk_sp<SkImageFilter> make_localspace_filter(sk_sp<SkPicture> pic, const SkRect& cropRect,
SkFilterQuality fq) {
SkISize dim = { SkScalarRoundToInt(cropRect.width()), SkScalarRoundToInt(cropRect.height()) };
auto img = SkImage::MakeFromPicture(std::move(pic), dim, nullptr, nullptr,
SkImage::BitDepth::kU8, SkColorSpace::MakeSRGB());
return SkImageSource::Make(img, cropRect, cropRect, fq);
}
sk_sp<SkFlattenable> SkPictureImageFilter::CreateProc(SkReadBuffer& buffer) {
sk_sp<SkPicture> picture;
SkRect cropRect;
if (buffer.readBool()) {
picture = SkPicturePriv::MakeFromBuffer(buffer);
}
buffer.readRect(&cropRect);
if (buffer.isVersionLT(SkReadBuffer::kRemovePictureImageFilterLocalSpace)) {
PictureResolution pictureResolution = buffer.checkRange<PictureResolution>(
kDeviceSpace_PictureResolution, kLocalSpace_PictureResolution);
if (kLocalSpace_PictureResolution == pictureResolution) {
return make_localspace_filter(std::move(picture), cropRect,
buffer.checkFilterQuality());
}
}
return sk_sp<SkImageFilter>(new SkPictureImageFilter(picture, cropRect, nullptr));
}
void SkPictureImageFilter::flatten(SkWriteBuffer& buffer) const {
bool hasPicture = (fPicture != nullptr);
buffer.writeBool(hasPicture);
if (hasPicture) {
SkPicturePriv::Flatten(fPicture, buffer);
}
buffer.writeRect(fCropRect);
}
sk_sp<SkSpecialImage> SkPictureImageFilter::onFilterImage(SkSpecialImage* source,
const Context& ctx,
SkIPoint* offset) const {
if (!fPicture) {
return nullptr;
}
SkRect floatBounds;
ctx.ctm().mapRect(&floatBounds, fCropRect);
SkIRect bounds = floatBounds.roundOut();
if (!bounds.intersect(ctx.clipBounds())) {
return nullptr;
}
SkASSERT(!bounds.isEmpty());
sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), bounds.size()));
if (!surf) {
return nullptr;
}
SkCanvas* canvas = surf->getCanvas();
SkASSERT(canvas);
canvas->clear(0x0);
std::unique_ptr<SkCanvas> xformCanvas;
if (fColorSpace) {
// Only non-null in the case where onMakeColorSpace() was called. This instructs
// us to do the color space xform on playback.
xformCanvas = SkCreateColorSpaceXformCanvas(canvas, fColorSpace);
canvas = xformCanvas.get();
}
canvas->translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop));
canvas->concat(ctx.ctm());
canvas->drawPicture(fPicture);
offset->fX = bounds.fLeft;
offset->fY = bounds.fTop;
return surf->makeImageSnapshot();
}
sk_sp<SkImageFilter> SkPictureImageFilter::onMakeColorSpace(SkColorSpaceXformer* xformer) const {
sk_sp<SkColorSpace> dstCS = xformer->dst();
if (SkColorSpace::Equals(dstCS.get(), fColorSpace.get())) {
return this->refMe();
}
return sk_sp<SkImageFilter>(new SkPictureImageFilter(fPicture, fCropRect, std::move(dstCS)));
}
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