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// Copyright 2018 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 "third_party/blink/renderer/modules/canvas/imagebitmap/image_bitmap_rendering_context_base.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_union_htmlcanvaselement_offscreencanvas.h"
#include "third_party/blink/renderer/bindings/modules/v8/html_canvas_element_or_offscreen_canvas.h"
#include "third_party/blink/renderer/bindings/modules/v8/rendering_context.h"
#include "third_party/blink/renderer/core/imagebitmap/image_bitmap.h"
#include "third_party/blink/renderer/platform/graphics/gpu/image_layer_bridge.h"
#include "third_party/blink/renderer/platform/graphics/gpu/shared_gpu_context.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/static_bitmap_image.h"
#include "third_party/blink/renderer/platform/graphics/unaccelerated_static_bitmap_image.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkSurface.h"
namespace blink {
ImageBitmapRenderingContextBase::ImageBitmapRenderingContextBase(
CanvasRenderingContextHost* host,
const CanvasContextCreationAttributesCore& attrs)
: CanvasRenderingContext(host, attrs),
image_layer_bridge_(MakeGarbageCollected<ImageLayerBridge>(
attrs.alpha ? kNonOpaque : kOpaque)) {}
ImageBitmapRenderingContextBase::~ImageBitmapRenderingContextBase() = default;
#if defined(USE_BLINK_V8_BINDING_NEW_IDL_UNION)
V8UnionHTMLCanvasElementOrOffscreenCanvas*
ImageBitmapRenderingContextBase::getHTMLOrOffscreenCanvas() const {
if (Host()->IsOffscreenCanvas()) {
return MakeGarbageCollected<V8UnionHTMLCanvasElementOrOffscreenCanvas>(
static_cast<OffscreenCanvas*>(Host()));
}
return MakeGarbageCollected<V8UnionHTMLCanvasElementOrOffscreenCanvas>(
static_cast<HTMLCanvasElement*>(Host()));
}
#else // defined(USE_BLINK_V8_BINDING_NEW_IDL_UNION)
void ImageBitmapRenderingContextBase::getHTMLOrOffscreenCanvas(
HTMLCanvasElementOrOffscreenCanvas& result) const {
if (Host()->IsOffscreenCanvas()) {
result.SetOffscreenCanvas(static_cast<OffscreenCanvas*>(Host()));
} else {
result.SetHTMLCanvasElement(static_cast<HTMLCanvasElement*>(Host()));
}
}
#endif // defined(USE_BLINK_V8_BINDING_NEW_IDL_UNION)
void ImageBitmapRenderingContextBase::Stop() {
image_layer_bridge_->Dispose();
}
void ImageBitmapRenderingContextBase::ResetInternalBitmapToBlackTransparent(
int width,
int height) {
SkBitmap black_bitmap;
black_bitmap.allocN32Pixels(width, height);
black_bitmap.eraseARGB(0, 0, 0, 0);
auto image = SkImage::MakeFromBitmap(black_bitmap);
if (image) {
image_layer_bridge_->SetImage(
UnacceleratedStaticBitmapImage::Create(image));
}
}
void ImageBitmapRenderingContextBase::SetImage(ImageBitmap* image_bitmap) {
DCHECK(!image_bitmap || !image_bitmap->IsNeutered());
// According to the standard TransferFromImageBitmap(null) has to reset the
// internal bitmap and create a black transparent one.
if (image_bitmap)
image_layer_bridge_->SetImage(image_bitmap->BitmapImage());
else
ResetInternalBitmapToBlackTransparent(Host()->width(), Host()->height());
DidDraw();
if (image_bitmap)
image_bitmap->close();
}
scoped_refptr<StaticBitmapImage> ImageBitmapRenderingContextBase::GetImage() {
return image_layer_bridge_->GetImage();
}
scoped_refptr<StaticBitmapImage>
ImageBitmapRenderingContextBase::GetImageAndResetInternal() {
if (!image_layer_bridge_->GetImage())
return nullptr;
scoped_refptr<StaticBitmapImage> copy_image = image_layer_bridge_->GetImage();
ResetInternalBitmapToBlackTransparent(copy_image->width(),
copy_image->height());
return copy_image;
}
void ImageBitmapRenderingContextBase::SetUV(const FloatPoint& left_top,
const FloatPoint& right_bottom) {
image_layer_bridge_->SetUV(left_top, right_bottom);
}
cc::Layer* ImageBitmapRenderingContextBase::CcLayer() const {
return image_layer_bridge_->CcLayer();
}
bool ImageBitmapRenderingContextBase::IsPaintable() const {
return !!image_layer_bridge_->GetImage();
}
void ImageBitmapRenderingContextBase::Trace(Visitor* visitor) const {
visitor->Trace(image_layer_bridge_);
CanvasRenderingContext::Trace(visitor);
}
bool ImageBitmapRenderingContextBase::IsAccelerated() const {
return image_layer_bridge_->IsAccelerated();
}
bool ImageBitmapRenderingContextBase::CanCreateCanvas2dResourceProvider()
const {
DCHECK(Host());
DCHECK(Host()->IsOffscreenCanvas());
return !!static_cast<OffscreenCanvas*>(Host())->GetOrCreateResourceProvider();
}
bool ImageBitmapRenderingContextBase::PushFrame() {
DCHECK(Host());
DCHECK(Host()->IsOffscreenCanvas());
if (!CanCreateCanvas2dResourceProvider())
return false;
scoped_refptr<StaticBitmapImage> image = image_layer_bridge_->GetImage();
cc::PaintFlags paint_flags;
paint_flags.setBlendMode(SkBlendMode::kSrc);
Host()->ResourceProvider()->Canvas()->drawImage(
image->PaintImageForCurrentFrame(), 0, 0, SkSamplingOptions(),
&paint_flags);
scoped_refptr<CanvasResource> resource =
Host()->ResourceProvider()->ProduceCanvasResource();
Host()->PushFrame(
std::move(resource),
SkIRect::MakeWH(image_layer_bridge_->GetImage()->Size().Width(),
image_layer_bridge_->GetImage()->Size().Height()));
return true;
}
bool ImageBitmapRenderingContextBase::IsOriginTopLeft() const {
if (Host()->IsOffscreenCanvas())
return false;
return IsAccelerated();
}
} // namespace blink
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