Added MiniCL, a limited subset of OpenCL, the open standard for parallel programming of heterogeneous systems.

MiniCL includes a cross-platform run-time frontend based on pthreads, Win32 Threads, or libspe2 for Cell SPU.
It is there, to bridge the gap until OpenCL is more widely available.

See Bullet/Demos/VectorAdd, influenced by NVidia OpenCL Jumpstart Guide:
http://developer.download.nvidia.com/OpenCL/NVIDIA_OpenCL_JumpStart_Guide.pdf

src/MiniCL/cl_gl.h

@@ -0,0 +1,113 @@
+/**********************************************************************************
+ * Copyright (c) 2008-2009 The Khronos Group Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and/or associated documentation files (the
+ * "Materials"), to deal in the Materials without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Materials, and to
+ * permit persons to whom the Materials are furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Materials.
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+ **********************************************************************************/
+
+#ifndef __OPENCL_CL_GL_H
+#define __OPENCL_CL_GL_H
+
+#ifdef __APPLE__
+#include <OpenCL/cl_platform.h>
+#else
+#include <CL/cl_platform.h>
+#endif	
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// NOTE:  Make sure that appropriate GL header file is included separately
+
+typedef cl_uint     cl_gl_object_type;
+typedef cl_uint     cl_gl_texture_info;
+typedef cl_uint     cl_gl_platform_info;
+
+// cl_gl_object_type
+#define CL_GL_OBJECT_BUFFER             0x2000
+#define CL_GL_OBJECT_TEXTURE2D          0x2001
+#define CL_GL_OBJECT_TEXTURE3D          0x2002
+#define CL_GL_OBJECT_RENDERBUFFER       0x2003
+
+// cl_gl_texture_info
+#define CL_GL_TEXTURE_TARGET            0x2004
+#define CL_GL_MIPMAP_LEVEL              0x2005
+
+extern CL_API_ENTRY cl_mem CL_API_CALL
+clCreateFromGLBuffer(cl_context     /* context */,
+                     cl_mem_flags   /* flags */,
+                     GLuint         /* bufobj */,
+                     int *          /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;
+
+extern CL_API_ENTRY cl_mem CL_API_CALL
+clCreateFromGLTexture2D(cl_context      /* context */,
+                        cl_mem_flags    /* flags */,
+                        GLenum          /* target */,
+                        GLint           /* miplevel */,
+                        GLuint          /* texture */,
+                        cl_int *        /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;
+
+extern CL_API_ENTRY cl_mem CL_API_CALL
+clCreateFromGLTexture3D(cl_context      /* context */,
+                        cl_mem_flags    /* flags */,
+                        GLenum          /* target */,
+                        GLint           /* miplevel */,
+                        GLuint          /* texture */,
+                        cl_int *        /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;
+
+extern CL_API_ENTRY cl_mem CL_API_CALL
+clCreateFromGLRenderbuffer(cl_context   /* context */,
+                           cl_mem_flags /* flags */,
+                           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 */,
+                  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;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // __OPENCL_CL_GL_H