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// Copyright 2021 The Chromium Authors
// 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/canvas2d/canvas_image_source_util.h"
#include "base/check.h"
#include "base/memory/scoped_refptr.h" // IWYU pragma: keep (https://github.com/clangd/clangd/issues/2052)
#include "base/notreached.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_typedefs.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_cssimagevalue_htmlcanvaselement_htmlimageelement_htmlvideoelement_imagebitmap_offscreencanvas_svgimageelement_videoframe.h"
#include "third_party/blink/renderer/core/css/cssom/css_style_image_value.h" // IWYU pragma: keep (https://github.com/clangd/clangd/issues/2044)
#include "third_party/blink/renderer/core/html/canvas/canvas_image_source.h"
#include "third_party/blink/renderer/core/html/canvas/html_canvas_element.h"
#include "third_party/blink/renderer/core/html/html_image_element.h"
#include "third_party/blink/renderer/core/html/media/html_video_element.h"
#include "third_party/blink/renderer/core/imagebitmap/image_bitmap.h"
#include "third_party/blink/renderer/core/offscreencanvas/offscreen_canvas.h"
#include "third_party/blink/renderer/core/svg/svg_image_element.h" // IWYU pragma: keep (https://github.com/clangd/clangd/issues/2044)
#include "third_party/blink/renderer/modules/webcodecs/video_frame.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "ui/gfx/geometry/size.h"
namespace blink {
CanvasImageSource* ToCanvasImageSource(const V8CanvasImageSource* value,
ExceptionState& exception_state) {
DCHECK(value);
switch (value->GetContentType()) {
case V8CanvasImageSource::ContentType::kCSSImageValue:
return value->GetAsCSSImageValue();
case V8CanvasImageSource::ContentType::kHTMLCanvasElement: {
if (value->GetAsHTMLCanvasElement()->Size().IsEmpty()) {
exception_state.ThrowDOMException(
DOMExceptionCode::kInvalidStateError,
"The image argument is a canvas element with a width "
"or height of 0.");
return nullptr;
}
return value->GetAsHTMLCanvasElement();
}
case V8CanvasImageSource::ContentType::kHTMLImageElement:
return value->GetAsHTMLImageElement();
case V8CanvasImageSource::ContentType::kHTMLVideoElement: {
HTMLVideoElement* video = value->GetAsHTMLVideoElement();
video->VideoWillBeDrawnToCanvas();
return video;
}
case V8CanvasImageSource::ContentType::kImageBitmap:
if (value->GetAsImageBitmap()->IsNeutered()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
"The image source is detached");
return nullptr;
}
return value->GetAsImageBitmap();
case V8CanvasImageSource::ContentType::kOffscreenCanvas:
if (value->GetAsOffscreenCanvas()->IsNeutered()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
"The image source is detached");
return nullptr;
}
if (value->GetAsOffscreenCanvas()->Size().IsEmpty()) {
exception_state.ThrowDOMException(
DOMExceptionCode::kInvalidStateError,
"The image argument is an OffscreenCanvas element "
"with a width or height of 0.");
return nullptr;
}
return value->GetAsOffscreenCanvas();
case V8CanvasImageSource::ContentType::kSVGImageElement:
return value->GetAsSVGImageElement();
case V8CanvasImageSource::ContentType::kVideoFrame: {
VideoFrame* video_frame = value->GetAsVideoFrame();
if (!video_frame->frame()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
"The VideoFrame has been closed");
return nullptr;
}
return video_frame;
}
}
NOTREACHED();
}
bool WouldTaintCanvasOrigin(CanvasImageSource* image_source) {
// Don't taint the canvas on data URLs. This special case is needed here
// because CanvasImageSource::WouldTaintOrigin() can return false for data
// URLs due to restrictions on SVG foreignObject nodes as described in
// https://crbug.com/294129.
// TODO(crbug.com/294129): Remove the restriction on foreignObject nodes, then
// this logic isn't needed, CanvasImageSource::SourceURL() isn't needed, and
// this function can just be image_source->WouldTaintOrigin().
const KURL& source_url = image_source->SourceURL();
const bool has_url = (source_url.IsValid() && !source_url.IsAboutBlankURL());
if (has_url && source_url.ProtocolIsData()) {
return false;
}
return image_source->WouldTaintOrigin();
}
} // namespace blink
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