blob: b153728c98779abbf49314ced2c7e9fb6e31812f [file] [log] [blame]
// 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 "base/callback.h"
#include "base/macros.h"
#include "base/sequence_checker.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "services/viz/privileged/interfaces/compositing/frame_sink_video_capture.mojom.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/geometry/rect_f.h"
namespace media {
class VideoFrame;
namespace content {
// A minimal FrameSinkVideoCaptureOverlay implementation for aura::Window video
// capture on ChromeOS (i.e., not desktop capture, and not WebContents capture).
// See class comments for LameWindowCapturerChromeOS for further details on why
// this exists and why this placeholder is needed for now.
// The implementation here is a hodgepodge of code borrowed from
// viz::VideoCaptureOverlay and the legacy content::CursorRenderer. Like its
// full-featured VIZ cousin, it will cache the scaled version of the bitmap, and
// re-use it across multiple frames. However, the rest of the rendering impl is
// overly-simplified, sufferring from color accuracy and image sampling issues.
// However, its quality is sufficient for its main use as a mouse cursor
// renderer.
// TODO(crbug/806366): The goal is to remove this code by 2019.
class CONTENT_EXPORT LameCaptureOverlayChromeOS
: public viz::mojom::FrameSinkVideoCaptureOverlay {
// Implemented by LameWindowCapturerChromeOS.
class CONTENT_EXPORT Owner {
// Called to notify that the |overlay| has lost its mojo binding. The owner
// will usually delete it during this method call.
virtual void OnOverlayConnectionLost(
LameCaptureOverlayChromeOS* overlay) = 0;
virtual ~Owner();
// A OnceCallback that, when run, renders the overlay on a VideoFrame.
using OnceRenderer = base::OnceCallback<void(media::VideoFrame*)>;
Owner* owner,
viz::mojom::FrameSinkVideoCaptureOverlayRequest request);
~LameCaptureOverlayChromeOS() final;
// viz::mojom::FrameSinkVideoCaptureOverlay implementation.
void SetImageAndBounds(const SkBitmap& image, const gfx::RectF& bounds) final;
void SetBounds(const gfx::RectF& bounds) final;
// Returns a OnceCallback that, when run, renders this overlay on an
// I420-format VideoFrame. The overlay's position and size are computed based
// on the given content |region_in_frame|. Returns a null OnceCallback if
// there is nothing to render at this time.
OnceRenderer MakeRenderer(const gfx::Rect& region_in_frame);
mojo::Binding<viz::mojom::FrameSinkVideoCaptureOverlay> binding_;
SkBitmap image_;
gfx::RectF bounds_;
// The scaled |image_| used in the last call to MakeRenderer(). This is reset
// and re-generated whenever: a) the |image_| changes, or b) the required
// bitmap size changes.
SkBitmap cached_scaled_image_;
} // namespace content