/*******************************************************************************
 * Copyright (c) 2008-2021 The Khronos Group Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

#ifndef __OPENCL_CL_GL_H
#define __OPENCL_CL_GL_H

#include <CL/cl.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef cl_uint     cl_gl_object_type;
typedef cl_uint     cl_gl_texture_info;
typedef cl_uint     cl_gl_platform_info;
typedef struct __GLsync *cl_GLsync;

/* cl_gl_object_type = 0x2000 - 0x200F enum values are currently taken           */
#define CL_GL_OBJECT_BUFFER                     0x2000
#define CL_GL_OBJECT_TEXTURE2D                  0x2001
#define CL_GL_OBJECT_TEXTURE3D                  0x2002
#define CL_GL_OBJECT_RENDERBUFFER               0x2003
#ifdef CL_VERSION_1_2
#define CL_GL_OBJECT_TEXTURE2D_ARRAY            0x200E
#define CL_GL_OBJECT_TEXTURE1D                  0x200F
#define CL_GL_OBJECT_TEXTURE1D_ARRAY            0x2010
#define CL_GL_OBJECT_TEXTURE_BUFFER             0x2011
#endif

/* cl_gl_texture_info           */
#define CL_GL_TEXTURE_TARGET                    0x2004
#define CL_GL_MIPMAP_LEVEL                      0x2005
#ifdef CL_VERSION_1_2
#define CL_GL_NUM_SAMPLES                       0x2012
#endif


extern CL_API_ENTRY cl_mem CL_API_CALL
clCreateFromGLBuffer(cl_context     context,
                     cl_mem_flags   flags,
                     cl_GLuint      bufobj,
                     cl_int *       errcode_ret) CL_API_SUFFIX__VERSION_1_0;

#ifdef CL_VERSION_1_2

extern CL_API_ENTRY cl_mem CL_API_CALL
clCreateFromGLTexture(cl_context      context,
                      cl_mem_flags    flags,
                      cl_GLenum       target,
                      cl_GLint        miplevel,
                      cl_GLuint       texture,
                      cl_int *        errcode_ret) CL_API_SUFFIX__VERSION_1_2;

#endif

extern CL_API_ENTRY cl_mem CL_API_CALL
clCreateFromGLRenderbuffer(cl_context   context,
                           cl_mem_flags flags,
                           cl_GLuint    renderbuffer,
                           cl_int *     errcode_ret) CL_API_SUFFIX__VERSION_1_0;

extern CL_API_ENTRY cl_int CL_API_CALL
clGetGLObjectInfo(cl_mem                memobj,
                  cl_gl_object_type *   gl_object_type,
                  cl_GLuint *           gl_object_name) CL_API_SUFFIX__VERSION_1_0;

extern CL_API_ENTRY cl_int CL_API_CALL
clGetGLTextureInfo(cl_mem               memobj,
                   cl_gl_texture_info   param_name,
                   size_t               param_value_size,
                   void *               param_value,
                   size_t *             param_value_size_ret) CL_API_SUFFIX__VERSION_1_0;

extern CL_API_ENTRY cl_int CL_API_CALL
clEnqueueAcquireGLObjects(cl_command_queue      command_queue,
                          cl_uint               num_objects,
                          const cl_mem *        mem_objects,
                          cl_uint               num_events_in_wait_list,
                          const cl_event *      event_wait_list,
                          cl_event *            event) CL_API_SUFFIX__VERSION_1_0;

extern CL_API_ENTRY cl_int CL_API_CALL
clEnqueueReleaseGLObjects(cl_command_queue      command_queue,
                          cl_uint               num_objects,
                          const cl_mem *        mem_objects,
                          cl_uint               num_events_in_wait_list,
                          const cl_event *      event_wait_list,
                          cl_event *            event) CL_API_SUFFIX__VERSION_1_0;


/* Deprecated OpenCL 1.1 APIs */
extern CL_API_ENTRY CL_API_PREFIX__VERSION_1_1_DEPRECATED cl_mem CL_API_CALL
clCreateFromGLTexture2D(cl_context      context,
                        cl_mem_flags    flags,
                        cl_GLenum       target,
                        cl_GLint        miplevel,
                        cl_GLuint       texture,
                        cl_int *        errcode_ret) CL_API_SUFFIX__VERSION_1_1_DEPRECATED;

extern CL_API_ENTRY CL_API_PREFIX__VERSION_1_1_DEPRECATED cl_mem CL_API_CALL
clCreateFromGLTexture3D(cl_context      context,
                        cl_mem_flags    flags,
                        cl_GLenum       target,
                        cl_GLint        miplevel,
                        cl_GLuint       texture,
                        cl_int *        errcode_ret) CL_API_SUFFIX__VERSION_1_1_DEPRECATED;

/* cl_khr_gl_sharing extension  */

#define cl_khr_gl_sharing 1

typedef cl_uint     cl_gl_context_info;

/* Additional Error Codes  */
#define CL_INVALID_GL_SHAREGROUP_REFERENCE_KHR  -1000

/* cl_gl_context_info  */
#define CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR    0x2006
#define CL_DEVICES_FOR_GL_CONTEXT_KHR           0x2007

/* Additional cl_context_properties  */
#define CL_GL_CONTEXT_KHR                       0x2008
#define CL_EGL_DISPLAY_KHR                      0x2009
#define CL_GLX_DISPLAY_KHR                      0x200A
#define CL_WGL_HDC_KHR                          0x200B
#define CL_CGL_SHAREGROUP_KHR                   0x200C

extern CL_API_ENTRY cl_int CL_API_CALL
clGetGLContextInfoKHR(const cl_context_properties * properties,
                      cl_gl_context_info            param_name,
                      size_t                        param_value_size,
                      void *                        param_value,
                      size_t *                      param_value_size_ret) CL_API_SUFFIX__VERSION_1_0;

typedef cl_int (CL_API_CALL *clGetGLContextInfoKHR_fn)(
    const cl_context_properties * properties,
    cl_gl_context_info            param_name,
    size_t                        param_value_size,
    void *                        param_value,
    size_t *                      param_value_size_ret);

/* 
 *  cl_khr_gl_event extension
 */
#define CL_COMMAND_GL_FENCE_SYNC_OBJECT_KHR     0x200D

extern CL_API_ENTRY cl_event CL_API_CALL
clCreateEventFromGLsyncKHR(cl_context context,
                           cl_GLsync  sync,
                           cl_int *   errcode_ret) CL_API_SUFFIX__VERSION_1_1;

#ifdef __cplusplus
}
#endif

#endif  /* __OPENCL_CL_GL_H */