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304 lines
10 KiB
C
304 lines
10 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright 2016 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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/* Mesa OpenGL inter-driver interoperability interface designed for but not
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* limited to OpenCL.
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*
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* This is a driver-agnostic, backward-compatible interface. The structures
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* are only allowed to grow. They can never shrink and their members can
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* never be removed, renamed, or redefined.
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*
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* The interface doesn't return a lot of static texture parameters like
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* width, height, etc. It mainly returns mutable buffer and texture view
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* parameters that can't be part of the texture allocation (because they are
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* mutable). If drivers want to return more data or want to return static
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* allocation parameters, they can do it in one of these two ways:
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* - attaching the data to the DMABUF handle in a driver-specific way
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* - passing the data via "out_driver_data" in the "in" structure.
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*
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* Mesa is expected to do a lot of error checking on behalf of OpenCL, such
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* as checking the target, miplevel, and texture completeness.
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*
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* OpenCL, on the other hand, needs to check if the display+context combo
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* is compatible with the OpenCL driver by querying the device information.
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* It also needs to check if the texture internal format and channel ordering
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* (returned in a driver-specific way) is supported by OpenCL, among other
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* things.
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*/
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#ifndef MESA_GLINTEROP_H
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#define MESA_GLINTEROP_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Forward declarations to avoid inclusion of GL/glx.h */
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struct _XDisplay;
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struct __GLXcontextRec;
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/* Forward declarations to avoid inclusion of EGL/egl.h */
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typedef void *EGLDisplay;
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typedef void *EGLContext;
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/** Returned error codes. */
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enum {
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MESA_GLINTEROP_SUCCESS = 0,
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MESA_GLINTEROP_OUT_OF_RESOURCES,
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MESA_GLINTEROP_OUT_OF_HOST_MEMORY,
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MESA_GLINTEROP_INVALID_OPERATION,
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MESA_GLINTEROP_INVALID_VERSION,
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MESA_GLINTEROP_INVALID_DISPLAY,
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MESA_GLINTEROP_INVALID_CONTEXT,
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MESA_GLINTEROP_INVALID_TARGET,
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MESA_GLINTEROP_INVALID_OBJECT,
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MESA_GLINTEROP_INVALID_MIP_LEVEL,
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MESA_GLINTEROP_UNSUPPORTED
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};
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/** Access flags. */
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enum {
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MESA_GLINTEROP_ACCESS_READ_WRITE = 0,
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MESA_GLINTEROP_ACCESS_READ_ONLY,
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MESA_GLINTEROP_ACCESS_WRITE_ONLY
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};
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#define MESA_GLINTEROP_DEVICE_INFO_VERSION 1
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/**
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* Device information returned by Mesa.
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*/
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struct mesa_glinterop_device_info {
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/* The caller should set this to the version of the struct they support */
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/* The callee will overwrite it if it supports a lower version.
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*
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* The caller should check the value and access up-to the version supported
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* by the the callee.
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*/
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/* NOTE: Do not use the MESA_GLINTEROP_DEVICE_INFO_VERSION macro */
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uint32_t version;
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/* PCI location */
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uint32_t pci_segment_group;
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uint32_t pci_bus;
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uint32_t pci_device;
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uint32_t pci_function;
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/* Device identification */
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uint32_t vendor_id;
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uint32_t device_id;
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/* Structure version 1 ends here. */
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};
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#define MESA_GLINTEROP_EXPORT_IN_VERSION 1
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/**
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* Input parameters to Mesa interop export functions.
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*/
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struct mesa_glinterop_export_in {
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/* The caller should set this to the version of the struct they support */
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/* The callee will overwrite it if it supports a lower version.
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*
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* The caller should check the value and access up-to the version supported
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* by the the callee.
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*/
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/* NOTE: Do not use the MESA_GLINTEROP_EXPORT_IN_VERSION macro */
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uint32_t version;
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/* One of the following:
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* - GL_TEXTURE_BUFFER
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* - GL_TEXTURE_1D
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* - GL_TEXTURE_2D
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* - GL_TEXTURE_3D
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* - GL_TEXTURE_RECTANGLE
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* - GL_TEXTURE_1D_ARRAY
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* - GL_TEXTURE_2D_ARRAY
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* - GL_TEXTURE_CUBE_MAP_ARRAY
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* - GL_TEXTURE_CUBE_MAP
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* - GL_TEXTURE_CUBE_MAP_POSITIVE_X
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* - GL_TEXTURE_CUBE_MAP_NEGATIVE_X
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* - GL_TEXTURE_CUBE_MAP_POSITIVE_Y
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* - GL_TEXTURE_CUBE_MAP_NEGATIVE_Y
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* - GL_TEXTURE_CUBE_MAP_POSITIVE_Z
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* - GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
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* - GL_TEXTURE_2D_MULTISAMPLE
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* - GL_TEXTURE_2D_MULTISAMPLE_ARRAY
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* - GL_TEXTURE_EXTERNAL_OES
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* - GL_RENDERBUFFER
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* - GL_ARRAY_BUFFER
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*/
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unsigned target;
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/* If target is GL_ARRAY_BUFFER, it's a buffer object.
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* If target is GL_RENDERBUFFER, it's a renderbuffer object.
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* If target is GL_TEXTURE_*, it's a texture object.
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*/
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unsigned obj;
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/* Mipmap level. Ignored for non-texture objects. */
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unsigned miplevel;
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/* One of MESA_GLINTEROP_ACCESS_* flags. This describes how the exported
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* object is going to be used.
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*/
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uint32_t access;
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/* Size of memory pointed to by out_driver_data. */
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uint32_t out_driver_data_size;
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/* If the caller wants to query driver-specific data about the OpenGL
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* object, this should point to the memory where that data will be stored.
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* This is expected to be a temporary staging memory. The pointer is not
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* allowed to be saved for later use by Mesa.
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*/
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void *out_driver_data;
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/* Structure version 1 ends here. */
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};
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#define MESA_GLINTEROP_EXPORT_OUT_VERSION 1
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/**
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* Outputs of Mesa interop export functions.
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*/
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struct mesa_glinterop_export_out {
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/* The caller should set this to the version of the struct they support */
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/* The callee will overwrite it if it supports a lower version.
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*
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* The caller should check the value and access up-to the version supported
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* by the the callee.
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*/
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/* NOTE: Do not use the MESA_GLINTEROP_EXPORT_OUT_VERSION macro */
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uint32_t version;
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/* The DMABUF handle. It must be closed by the caller using the POSIX
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* close() function when it's not needed anymore. Mesa is not responsible
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* for closing the handle.
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*
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* Not closing the handle by the caller will lead to a resource leak,
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* will prevent releasing the GPU buffer, and may prevent creating new
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* DMABUF handles within the process.
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*/
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int dmabuf_fd;
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/* The mutable OpenGL internal format specified by glTextureView or
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* glTexBuffer. If the object is not one of those, the original internal
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* format specified by glTexStorage, glTexImage, or glRenderbufferStorage
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* will be returned.
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*/
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unsigned internal_format;
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/* Buffer offset and size for GL_ARRAY_BUFFER and GL_TEXTURE_BUFFER.
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* This allows interop with suballocations (a buffer allocated within
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* a larger buffer).
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*
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* Parameters specified by glTexBufferRange for GL_TEXTURE_BUFFER are
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* applied to these and can shrink the range further.
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*/
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ptrdiff_t buf_offset;
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ptrdiff_t buf_size;
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/* Parameters specified by glTextureView. If the object is not a texture
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* view, default parameters covering the whole texture will be returned.
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*/
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unsigned view_minlevel;
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unsigned view_numlevels;
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unsigned view_minlayer;
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unsigned view_numlayers;
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/* The number of bytes written to out_driver_data. */
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uint32_t out_driver_data_written;
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/* Structure version 1 ends here. */
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};
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/**
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* Query device information.
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*
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* \param dpy GLX display
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* \param context GLX context
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* \param out where to return the information
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*
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* \return MESA_GLINTEROP_SUCCESS or MESA_GLINTEROP_* != 0 on error
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*/
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int
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MesaGLInteropGLXQueryDeviceInfo(struct _XDisplay *dpy, struct __GLXcontextRec *context,
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struct mesa_glinterop_device_info *out);
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/**
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* Same as MesaGLInteropGLXQueryDeviceInfo except that it accepts EGLDisplay
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* and EGLContext.
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*/
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int
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MesaGLInteropEGLQueryDeviceInfo(EGLDisplay dpy, EGLContext context,
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struct mesa_glinterop_device_info *out);
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/**
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* Create and return a DMABUF handle corresponding to the given OpenGL
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* object, and return other parameters about the OpenGL object.
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*
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* \param dpy GLX display
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* \param context GLX context
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* \param in input parameters
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* \param out return values
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*
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* \return MESA_GLINTEROP_SUCCESS or MESA_GLINTEROP_* != 0 on error
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*/
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int
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MesaGLInteropGLXExportObject(struct _XDisplay *dpy, struct __GLXcontextRec *context,
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struct mesa_glinterop_export_in *in,
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struct mesa_glinterop_export_out *out);
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/**
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* Same as MesaGLInteropGLXExportObject except that it accepts
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* EGLDisplay and EGLContext.
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*/
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int
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MesaGLInteropEGLExportObject(EGLDisplay dpy, EGLContext context,
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struct mesa_glinterop_export_in *in,
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struct mesa_glinterop_export_out *out);
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typedef int (PFNMESAGLINTEROPGLXQUERYDEVICEINFOPROC)(struct _XDisplay *dpy, struct __GLXcontextRec *context,
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struct mesa_glinterop_device_info *out);
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typedef int (PFNMESAGLINTEROPEGLQUERYDEVICEINFOPROC)(EGLDisplay dpy, EGLContext context,
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struct mesa_glinterop_device_info *out);
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typedef int (PFNMESAGLINTEROPGLXEXPORTOBJECTPROC)(struct _XDisplay *dpy, struct __GLXcontextRec *context,
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struct mesa_glinterop_export_in *in,
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struct mesa_glinterop_export_out *out);
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typedef int (PFNMESAGLINTEROPEGLEXPORTOBJECTPROC)(EGLDisplay dpy, EGLContext context,
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struct mesa_glinterop_export_in *in,
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struct mesa_glinterop_export_out *out);
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#ifdef __cplusplus
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}
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#endif
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#endif /* MESA_GLINTEROP_H */
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