| Name |
| |
| MESA_agp_offset |
| |
| Name Strings |
| |
| GLX_MESA_agp_offset |
| |
| Contact |
| |
| Brian Paul, Tungsten Graphics, Inc. (brian.paul 'at' tungstengraphics.com) |
| Keith Whitwell, Tungsten Graphics, Inc. (keith 'at' tungstengraphics.com) |
| |
| Status |
| |
| Obsolete. Effectively superseded by ARB_vertex_buffer_object. |
| |
| Version |
| |
| 1.0 |
| |
| Number |
| |
| TBD |
| |
| Dependencies |
| |
| OpenGL 1.0 or later is required |
| GLX_NV_vertex_array_range is required. |
| This extensions is written against the OpenGL 1.4 Specification. |
| |
| Overview |
| |
| This extensions provides a way to convert pointers in an AGP memory |
| region into byte offsets into the AGP aperture. |
| Note, this extension depends on GLX_NV_vertex_array_range, for which |
| no real specification exists. See GL_NV_vertex_array_range for more |
| information. |
| |
| IP Status |
| |
| None |
| |
| Issues |
| |
| None |
| |
| New Procedures and Functions |
| |
| unsigned int glXGetAGPOffsetMESA( const void *pointer ) |
| |
| New Tokens |
| |
| None |
| |
| Additions to the OpenGL 1.4 Specification |
| |
| None |
| |
| Additions to Chapter 3 the GLX 1.4 Specification (Functions and Errors) |
| |
| Add a new section, 3.6 as follows: |
| |
| 3.6 AGP Memory Access |
| |
| On "PC" computers, AGP memory can be allocated with glXAllocateMemoryNV |
| and freed with glXFreeMemoryNV. Sometimes it's useful to know where a |
| block of AGP memory is located with respect to the start of the AGP |
| aperture. The function |
| |
| GLuint glXGetAGPOffsetMESA( const GLvoid *pointer ) |
| |
| Returns the offset of the given memory block from the start of AGP |
| memory in basic machine units (i.e. bytes). If pointer is invalid |
| the value ~0 will be returned. |
| |
| GLX Protocol |
| |
| None. This is a client side-only extension. |
| |
| Errors |
| |
| glXGetAGPOffsetMESA will return ~0 if the pointer does not point to |
| an AGP memory region. |
| |
| New State |
| |
| None |
| |
| Revision History |
| |
| 20 September 2002 - Initial draft |
| 2 October 2002 - finished GLX chapter 3 additions |
| 27 July 2004 - use unsigned int instead of GLuint, void instead of GLvoid |
