69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/*
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* Copyright 2021 Derek Lesho for Codeweavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#define VKD3D_DBG_CHANNEL VKD3D_DBG_CHANNEL_API
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#include "vkd3d_private.h"
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#include "winioctl.h"
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#define IOCTL_SHARED_GPU_RESOURCE_SET_METADATA CTL_CODE(FILE_DEVICE_VIDEO, 4, METHOD_BUFFERED, FILE_WRITE_ACCESS)
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#define IOCTL_SHARED_GPU_RESOURCE_GET_METADATA CTL_CODE(FILE_DEVICE_VIDEO, 5, METHOD_BUFFERED, FILE_READ_ACCESS)
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#define IOCTL_SHARED_GPU_RESOURCE_OPEN CTL_CODE(FILE_DEVICE_VIDEO, 1, METHOD_BUFFERED, FILE_WRITE_ACCESS)
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bool vkd3d_set_shared_metadata(HANDLE handle, void *buf, uint32_t buf_size)
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{
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DWORD ret_size;
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return DeviceIoControl(handle, IOCTL_SHARED_GPU_RESOURCE_SET_METADATA, buf, buf_size, NULL, 0, &ret_size, NULL);
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}
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bool vkd3d_get_shared_metadata(HANDLE handle, void *buf, uint32_t buf_size, uint32_t *metadata_size)
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{
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DWORD ret_size;
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bool ret = DeviceIoControl(handle, IOCTL_SHARED_GPU_RESOURCE_GET_METADATA, NULL, 0, buf, buf_size, &ret_size, NULL);
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if (metadata_size)
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*metadata_size = ret_size;
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return ret;
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}
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HANDLE vkd3d_open_kmt_handle(HANDLE kmt_handle)
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{
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struct
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{
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unsigned int kmt_handle;
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/* the following parameter represents a larger sized string for a dynamically allocated struct for use when opening an object by name */
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WCHAR name[1];
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} shared_resource_open;
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HANDLE nt_handle = CreateFileA("\\\\.\\SharedGpuResource", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (nt_handle == INVALID_HANDLE_VALUE)
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return nt_handle;
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shared_resource_open.kmt_handle = (ULONG_PTR)kmt_handle;
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shared_resource_open.name[0] = 0;
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if (!DeviceIoControl(nt_handle, IOCTL_SHARED_GPU_RESOURCE_OPEN, &shared_resource_open, sizeof(shared_resource_open), NULL, 0, NULL, NULL))
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{
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CloseHandle(nt_handle);
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return INVALID_HANDLE_VALUE;
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}
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return nt_handle;
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}
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