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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 "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,
kDeviceSpace_PictureResolution,
kLow_SkFilterQuality,
nullptr));
}
sk_sp<SkImageFilter> SkPictureImageFilter::MakeForLocalSpace(sk_sp<SkPicture> picture,
const SkRect& cropRect,
SkFilterQuality filterQuality) {
return sk_sp<SkImageFilter>(new SkPictureImageFilter(std::move(picture),
cropRect,
kLocalSpace_PictureResolution,
filterQuality,
nullptr));
}
SkPictureImageFilter::SkPictureImageFilter(sk_sp<SkPicture> picture)
: INHERITED(nullptr, 0, nullptr)
, fPicture(std::move(picture))
, fCropRect(fPicture ? fPicture->cullRect() : SkRect::MakeEmpty())
, fPictureResolution(kDeviceSpace_PictureResolution)
, fFilterQuality(kLow_SkFilterQuality) {
}
SkPictureImageFilter::SkPictureImageFilter(sk_sp<SkPicture> picture, const SkRect& cropRect,
PictureResolution pictureResolution,
SkFilterQuality filterQuality,
sk_sp<SkColorSpace> colorSpace)
: INHERITED(nullptr, 0, nullptr)
, fPicture(std::move(picture))
, fCropRect(cropRect)
, fPictureResolution(pictureResolution)
, fFilterQuality(filterQuality)
, fColorSpace(std::move(colorSpace)) {
}
sk_sp<SkFlattenable> SkPictureImageFilter::CreateProc(SkReadBuffer& buffer) {
sk_sp<SkPicture> picture;
SkRect cropRect;
if (buffer.isCrossProcess() && SkPicture::PictureIOSecurityPrecautionsEnabled()) {
buffer.validate(!buffer.readBool());
} else {
if (buffer.readBool()) {
picture = SkPicture::MakeFromBuffer(buffer);
}
}
buffer.readRect(&cropRect);
PictureResolution pictureResolution = (PictureResolution)buffer.readInt();
if (kLocalSpace_PictureResolution == pictureResolution) {
//filterLevel is only serialized if pictureResolution is LocalSpace
SkFilterQuality filterQuality = (SkFilterQuality)buffer.readInt();
return MakeForLocalSpace(picture, cropRect, filterQuality);
}
return Make(picture, cropRect);
}
void SkPictureImageFilter::flatten(SkWriteBuffer& buffer) const {
if (buffer.isCrossProcess() && SkPicture::PictureIOSecurityPrecautionsEnabled()) {
buffer.writeBool(false);
} else {
bool hasPicture = (fPicture != nullptr);
buffer.writeBool(hasPicture);
if (hasPicture) {
fPicture->flatten(buffer);
}
}
buffer.writeRect(fCropRect);
buffer.writeInt(fPictureResolution);
if (kLocalSpace_PictureResolution == fPictureResolution) {
buffer.writeInt(fFilterQuality);
}
}
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);
if (kDeviceSpace_PictureResolution == fPictureResolution ||
0 == (ctx.ctm().getType() & ~SkMatrix::kTranslate_Mask)) {
this->drawPictureAtDeviceResolution(canvas, bounds, ctx);
} else {
this->drawPictureAtLocalResolution(source, canvas, bounds, ctx);
}
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, fPictureResolution,
fFilterQuality, std::move(dstCS)));
}
void SkPictureImageFilter::drawPictureAtDeviceResolution(SkCanvas* canvas,
const SkIRect& deviceBounds,
const Context& ctx) const {
std::unique_ptr<SkCanvas> xformCanvas = nullptr;
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(deviceBounds.fLeft), -SkIntToScalar(deviceBounds.fTop));
canvas->concat(ctx.ctm());
canvas->drawPicture(fPicture);
}
void SkPictureImageFilter::drawPictureAtLocalResolution(SkSpecialImage* source,
SkCanvas* canvas,
const SkIRect& deviceBounds,
const Context& ctx) const {
SkMatrix inverseCtm;
if (!ctx.ctm().invert(&inverseCtm)) {
return;
}
SkRect localBounds = SkRect::Make(ctx.clipBounds());
inverseCtm.mapRect(&localBounds);
if (!localBounds.intersect(fCropRect)) {
return;
}
SkIRect localIBounds = localBounds.roundOut();
sk_sp<SkSpecialImage> localImg;
{
sk_sp<SkSpecialSurface> localSurface(source->makeSurface(ctx.outputProperties(),
localIBounds.size()));
if (!localSurface) {
return;
}
SkCanvas* localCanvas = localSurface->getCanvas();
SkASSERT(localCanvas);
std::unique_ptr<SkCanvas> xformCanvas = nullptr;
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(localCanvas, fColorSpace);
localCanvas = xformCanvas.get();
}
localCanvas->clear(0x0);
localCanvas->translate(-SkIntToScalar(localIBounds.fLeft),
-SkIntToScalar(localIBounds.fTop));
localCanvas->drawPicture(fPicture);
localImg = localSurface->makeImageSnapshot();
SkASSERT(localImg);
}
{
canvas->translate(-SkIntToScalar(deviceBounds.fLeft), -SkIntToScalar(deviceBounds.fTop));
canvas->concat(ctx.ctm());
SkPaint paint;
paint.setFilterQuality(fFilterQuality);
localImg->draw(canvas,
SkIntToScalar(localIBounds.fLeft),
SkIntToScalar(localIBounds.fTop),
&paint);
}
}
#ifndef SK_IGNORE_TO_STRING
void SkPictureImageFilter::toString(SkString* str) const {
str->appendf("SkPictureImageFilter: (");
str->appendf("crop: (%f,%f,%f,%f) ",
fCropRect.fLeft, fCropRect.fTop, fCropRect.fRight, fCropRect.fBottom);
if (fPicture) {
str->appendf("picture: (%f,%f,%f,%f)",
fPicture->cullRect().fLeft, fPicture->cullRect().fTop,
fPicture->cullRect().fRight, fPicture->cullRect().fBottom);
}
str->append(")");
}
#endif
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