2d618de25a
Current DirectX capturer cannot capture multiple video cards or monitors. But according to DXGI desktop duplication sample (https://goo.gl/An0L9l), we can capture multiple video cards and monitors by duplicating them one by one. So instead of one IDXGIOutputDuplication instance, this change creates an IDXGIOutputDuplication instance for each monitor, and merge the output into one DesktopFrame. Several other changes are also included, 1. Add supports to DXGI_OUTDUPL_DESC.DesktopImageInSystemMemory. When this flag is true, we won't copy its content to staging buffer. 2. Capture one monitor instead of entire screen. Above changes make the logic complex. But with some refactor work, the logic is not disordered. Please refer to the doc @ https://goo.gl/hU1ifG. BUG=314516 Review-Url: https://codereview.webrtc.org/2099123002 Cr-Commit-Position: refs/heads/master@{#13684}
49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_WIN_DXGI_TEXTURE_MAPPING_H_
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#define WEBRTC_MODULES_DESKTOP_CAPTURE_WIN_DXGI_TEXTURE_MAPPING_H_
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#include <D3D11.h>
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#include <DXGI1_2.h>
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#include "webrtc/modules/desktop_capture/desktop_geometry.h"
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#include "webrtc/modules/desktop_capture/desktop_region.h"
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#include "webrtc/modules/desktop_capture/win/dxgi_texture.h"
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namespace webrtc {
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// A DxgiTexture which directly maps bitmap from IDXGIResource. This class is
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// used when DXGI_OUTDUPL_DESC.DesktopImageInSystemMemory is true. (This usually
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// means the video card shares main memory with CPU, instead of having its own
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// individual memory.)
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class DxgiTextureMapping : public DxgiTexture {
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public:
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// Creates a DxgiTextureMapping instance. Caller must maintain the lifetime
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// of input duplication to make sure it outlives this instance.
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DxgiTextureMapping(const DesktopRect& desktop_rect,
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IDXGIOutputDuplication* duplication);
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~DxgiTextureMapping() override;
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bool CopyFrom(const DXGI_OUTDUPL_FRAME_INFO& frame_info,
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IDXGIResource* resource,
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const DesktopRegion& region) override;
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bool DoRelease() override;
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private:
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IDXGIOutputDuplication* const duplication_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_DESKTOP_CAPTURE_WIN_DXGI_TEXTURE_MAPPING_H_
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