95 lines
2.8 KiB
C++
95 lines
2.8 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 "atom/common/native_mate_converters/gfx_converter.h"
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#include "base/bind.h"
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#include "content/public/browser/render_widget_host.h"
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#include "ui/display/display.h"
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#include "ui/display/screen.h"
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#include "atom/common/node_includes.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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bool only_dirty)
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: isolate_(isolate),
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view_(view),
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callback_(callback),
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only_dirty_(only_dirty),
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weak_factory_(this) {
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}
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bool FrameSubscriber::ShouldCaptureFrame(
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const gfx::Rect& dirty_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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if (dirty_rect.IsEmpty())
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return false;
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gfx::Rect rect = gfx::Rect(view_->GetVisibleViewportSize());
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if (only_dirty_)
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rect = dirty_rect;
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gfx::Size view_size = rect.size();
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gfx::Size bitmap_size = view_size;
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const gfx::NativeView native_view = view_->GetNativeView();
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const float scale =
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display::Screen::GetScreen()->GetDisplayNearestWindow(native_view)
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.device_scale_factor();
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if (scale > 1.0f)
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bitmap_size = gfx::ScaleToCeiledSize(view_size, scale);
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rect = gfx::Rect(rect.origin(), bitmap_size);
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host->CopyFromBackingStore(
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rect,
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rect.size(),
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base::Bind(&FrameSubscriber::OnFrameDelivered,
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weak_factory_.GetWeakPtr(), callback_, rect),
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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 gfx::Rect& damage_rect,
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const SkBitmap& bitmap,
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content::ReadbackResponse response) {
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if (response != content::ReadbackResponse::READBACK_SUCCESS)
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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_t*>(node::Buffer::Data(buffer.ToLocalChecked())),
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rgb_arr_size);
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v8::Local<v8::Value> damage =
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mate::Converter<gfx::Rect>::ToV8(isolate_, damage_rect);
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callback_.Run(buffer.ToLocalChecked(), damage);
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}
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} // namespace api
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} // namespace atom
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