65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
// Copyright (c) 2015 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/browser/api/frame_subscriber.h"
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#include "base/bind.h"
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#include "atom/common/node_includes.h"
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#include "content/public/browser/render_widget_host.h"
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namespace atom {
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namespace api {
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FrameSubscriber::FrameSubscriber(v8::Isolate* isolate,
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content::RenderWidgetHostView* view,
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const FrameCaptureCallback& callback)
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: isolate_(isolate), view_(view), callback_(callback), weak_factory_(this) {
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}
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bool FrameSubscriber::ShouldCaptureFrame(
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const gfx::Rect& damage_rect,
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base::TimeTicks present_time,
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scoped_refptr<media::VideoFrame>* storage,
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DeliverFrameCallback* callback) {
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const auto host = view_ ? view_->GetRenderWidgetHost() : nullptr;
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if (!view_ || !host)
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return false;
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const auto size = view_->GetVisibleViewportSize();
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host->CopyFromBackingStore(
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gfx::Rect(size),
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size,
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base::Bind(&FrameSubscriber::OnFrameDelivered,
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weak_factory_.GetWeakPtr(), callback_),
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kBGRA_8888_SkColorType);
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return false;
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}
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void FrameSubscriber::OnFrameDelivered(const FrameCaptureCallback& callback,
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const SkBitmap& bitmap, content::ReadbackResponse response) {
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if (bitmap.computeSize64() == 0)
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return;
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v8::Locker locker(isolate_);
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v8::HandleScope handle_scope(isolate_);
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size_t rgb_arr_size = bitmap.width() * bitmap.height() *
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bitmap.bytesPerPixel();
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v8::MaybeLocal<v8::Object> buffer = node::Buffer::New(isolate_, rgb_arr_size);
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if (buffer.IsEmpty())
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return;
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bitmap.copyPixelsTo(
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reinterpret_cast<uint8*>(node::Buffer::Data(buffer.ToLocalChecked())),
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rgb_arr_size);
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callback_.Run(buffer.ToLocalChecked());
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}
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} // namespace api
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} // namespace atom
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