1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgName 2f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 3f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org MESA_agp_offset 4f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 5f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgName Strings 6f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 7f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLX_MESA_agp_offset 8f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 9f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgContact 10f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 11f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org Brian Paul, Tungsten Graphics, Inc. (brian.paul 'at' tungstengraphics.com) 12f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org Keith Whitwell, Tungsten Graphics, Inc. (keith 'at' tungstengraphics.com) 13f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 14f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgStatus 15f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 16f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org Shipping (Mesa 4.0.4 and later. Only implemented in particular 17f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org XFree86/DRI drivers.) 18f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 19f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgVersion 20f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 21f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 1.0 22f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 23f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgNumber 24f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 25f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org TBD 26f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 27f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgDependencies 28f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 29f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org OpenGL 1.0 or later is required 30f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLX_NV_vertex_array_range is required. 31f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org This extensions is written against the OpenGL 1.4 Specification. 32f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 33f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgOverview 34f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 35f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org This extensions provides a way to convert pointers in an AGP memory 36f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org region into byte offsets into the AGP aperture. 37f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org Note, this extension depends on GLX_NV_vertex_array_range, for which 38f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org no real specification exists. See GL_NV_vertex_array_range for more 39f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org information. 40f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 41f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgIP Status 42f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 43f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org None 44f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 45f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgIssues 46f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 47f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org None 48f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 49f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgNew Procedures and Functions 50f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 51f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned int glXGetAGPOffsetMESA( const void *pointer ) 52f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 53f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgNew Tokens 54f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 55f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org None 56f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 57f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgAdditions to the OpenGL 1.4 Specification 58f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 59f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org None 60f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 61f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgAdditions to Chapter 3 the GLX 1.4 Specification (Functions and Errors) 62f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 63f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org Add a new section, 3.6 as follows: 64f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 65f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 3.6 AGP Memory Access 66f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 67f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org On "PC" computers, AGP memory can be allocated with glXAllocateMemoryNV 68f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org and freed with glXFreeMemoryNV. Sometimes it's useful to know where a 69f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org block of AGP memory is located with respect to the start of the AGP 70f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org aperture. The function 71f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 72f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLuint glXGetAGPOffsetMESA( const GLvoid *pointer ) 73f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 74f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org Returns the offset of the given memory block from the start of AGP 75f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org memory in basic machine units (i.e. bytes). If pointer is invalid 76f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org the value ~0 will be returned. 77f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 78f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgGLX Protocol 79f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 80f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org None. This is a client side-only extension. 81f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 82f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgErrors 83f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 84f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org glXGetAGPOffsetMESA will return ~0 if the pointer does not point to 85f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org an AGP memory region. 86f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 87f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgNew State 88f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 89f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org None 90f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 91f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgRevision History 92f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 93f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 20 September 2002 - Initial draft 94f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 2 October 2002 - finished GLX chapter 3 additions 95f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 27 July 2004 - use unsigned int instead of GLuint, void instead of GLvoid 96