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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/playback/image_hijack_canvas.h"
#include "cc/playback/discardable_image_map.h"
#include "cc/tiles/image_decode_controller.h"
#include "third_party/skia/include/core/SkTLazy.h"
namespace cc {
namespace {
SkIRect RoundOutRect(const SkRect& rect) {
SkIRect result;
rect.roundOut(&result);
return result;
}
class ScopedDecodedImageLock {
public:
ScopedDecodedImageLock(ImageDecodeController* image_decode_controller,
const SkImage* image,
const SkRect& src_rect,
const SkSize& scale,
bool is_decomposable,
bool has_perspective,
const SkPaint* paint)
: image_decode_controller_(image_decode_controller),
draw_image_(image,
RoundOutRect(src_rect),
scale,
paint ? paint->getFilterQuality() : kNone_SkFilterQuality,
has_perspective,
is_decomposable),
decoded_draw_image_(
image_decode_controller_->GetDecodedImageForDraw(draw_image_)) {
DCHECK(image->isLazyGenerated());
if (paint)
decoded_paint_.set(*paint)->setFilterQuality(
decoded_draw_image_.filter_quality());
}
~ScopedDecodedImageLock() {
image_decode_controller_->DrawWithImageFinished(draw_image_,
decoded_draw_image_);
}
const DecodedDrawImage& decoded_image() const { return decoded_draw_image_; }
const SkPaint* decoded_paint() const { return decoded_paint_.getMaybeNull(); }
private:
ImageDecodeController* image_decode_controller_;
DrawImage draw_image_;
DecodedDrawImage decoded_draw_image_;
// TODO(fmalita): use base::Optional when it becomes available
SkTLazy<SkPaint> decoded_paint_;
};
} // namespace
ImageHijackCanvas::ImageHijackCanvas(
int width,
int height,
ImageDecodeController* image_decode_controller)
: SkNWayCanvas(width, height),
image_decode_controller_(image_decode_controller) {}
void ImageHijackCanvas::onDrawPicture(const SkPicture* picture,
const SkMatrix* matrix,
const SkPaint* paint) {
// Ensure that pictures are unpacked by this canvas, instead of being
// forwarded to the raster canvas.
SkCanvas::onDrawPicture(picture, matrix, paint);
}
void ImageHijackCanvas::onDrawImage(const SkImage* image,
SkScalar x,
SkScalar y,
const SkPaint* paint) {
if (!image->isLazyGenerated()) {
SkNWayCanvas::onDrawImage(image, x, y, paint);
return;
}
SkMatrix ctm = getTotalMatrix();
SkSize scale;
bool is_decomposable = ExtractScale(ctm, &scale);
ScopedDecodedImageLock scoped_lock(
image_decode_controller_, image,
SkRect::MakeIWH(image->width(), image->height()), scale, is_decomposable,
ctm.hasPerspective(), paint);
const DecodedDrawImage& decoded_image = scoped_lock.decoded_image();
if (!decoded_image.image())
return;
DCHECK_EQ(0, static_cast<int>(decoded_image.src_rect_offset().width()));
DCHECK_EQ(0, static_cast<int>(decoded_image.src_rect_offset().height()));
const SkPaint* decoded_paint = scoped_lock.decoded_paint();
bool need_scale = !decoded_image.is_scale_adjustment_identity();
if (need_scale) {
SkNWayCanvas::save();
SkNWayCanvas::scale(1.f / (decoded_image.scale_adjustment().width()),
1.f / (decoded_image.scale_adjustment().height()));
}
SkNWayCanvas::onDrawImage(decoded_image.image(), x, y, decoded_paint);
if (need_scale)
SkNWayCanvas::restore();
}
void ImageHijackCanvas::onDrawImageRect(const SkImage* image,
const SkRect* src,
const SkRect& dst,
const SkPaint* paint,
SrcRectConstraint constraint) {
if (!image->isLazyGenerated()) {
SkNWayCanvas::onDrawImageRect(image, src, dst, paint, constraint);
return;
}
SkRect src_storage;
if (!src) {
src_storage = SkRect::MakeIWH(image->width(), image->height());
src = &src_storage;
}
SkMatrix matrix;
matrix.setRectToRect(*src, dst, SkMatrix::kFill_ScaleToFit);
matrix.postConcat(getTotalMatrix());
SkSize scale;
bool is_decomposable = ExtractScale(matrix, &scale);
ScopedDecodedImageLock scoped_lock(image_decode_controller_, image, *src,
scale, is_decomposable,
matrix.hasPerspective(), paint);
const DecodedDrawImage& decoded_image = scoped_lock.decoded_image();
if (!decoded_image.image())
return;
const SkPaint* decoded_paint = scoped_lock.decoded_paint();
SkRect adjusted_src =
src->makeOffset(decoded_image.src_rect_offset().width(),
decoded_image.src_rect_offset().height());
if (!decoded_image.is_scale_adjustment_identity()) {
float x_scale = decoded_image.scale_adjustment().width();
float y_scale = decoded_image.scale_adjustment().height();
adjusted_src = SkRect::MakeXYWH(
adjusted_src.x() * x_scale, adjusted_src.y() * y_scale,
adjusted_src.width() * x_scale, adjusted_src.height() * y_scale);
}
SkNWayCanvas::onDrawImageRect(decoded_image.image(), &adjusted_src, dst,
decoded_paint, constraint);
}
void ImageHijackCanvas::onDrawImageNine(const SkImage* image,
const SkIRect& center,
const SkRect& dst,
const SkPaint* paint) {
// No cc embedder issues image nine calls.
NOTREACHED();
}
} // namespace cc
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