obs-studio/libobs-d3d11/d3d11-stagesurf.cpp

/******************************************************************************
    Copyright (C) 2013 by Hugh Bailey <[email protected]>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/

#include "d3d11-subsystem.hpp"

gs_stage_surface::gs_stage_surface(gs_device_t *device, uint32_t width,
		uint32_t height, gs_color_format colorFormat)
	: gs_obj     (device, gs_type::gs_stage_surface),
	  width      (width),
	  height     (height),
	  format     (colorFormat),
	  dxgiFormat (ConvertGSTextureFormat(colorFormat))
{
	HRESULT hr;

	memset(&td, 0, sizeof(td));
	td.Width            = width;
	td.Height           = height;
	td.MipLevels        = 1;
	td.ArraySize        = 1;
	td.Format           = dxgiFormat;
	td.SampleDesc.Count = 1;
	td.CPUAccessFlags   = D3D11_CPU_ACCESS_READ;
	td.Usage            = D3D11_USAGE_STAGING;

	hr = device->device->CreateTexture2D(&td, NULL, texture.Assign());
	if (FAILED(hr))
		throw HRError("Failed to create staging surface", hr);
}