xserver xkeyboard-config libX11 randrproto pixman glproto mesa git update 22 May 2011

1 files changed, 1004 insertions, 1003 deletions

diff --git a/mesalib/src/mesa/main/extensions.c b/mesalib/src/mesa/main/extensions.c
index 8672ac2a7..267620a20 100644
--- a/mesalib/src/mesa/main/extensions.c
+++ b/mesalib/src/mesa/main/extensions.c
@@ -1,1003 +1,1004 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.6
- *
- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
- * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is 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 Software.
- *
- * THE SOFTWARE IS 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
- * BRIAN PAUL 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 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/**
- * \file
- * \brief Extension handling
- */
-
-
-#include "glheader.h"
-#include "imports.h"
-#include "context.h"
-#include "extensions.h"
-#include "mfeatures.h"
-#include "mtypes.h"
-
-enum {
-   DISABLE = 0,
-   GL  = 1 << API_OPENGL,
-   ES1 = 1 << API_OPENGLES,
-   ES2 = 1 << API_OPENGLES2,
-};
-
-/**
- * \brief An element of the \c extension_table.
- */
-struct extension {
-   /** Name of extension, such as "GL_ARB_depth_clamp". */
-   const char *name;
-
-   /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
-   size_t offset;
-
-   /** Set of API's in which the extension exists, as a bitset. */
-   uint8_t api_set;
-
-   /** Year the extension was proposed or approved.  Used to sort the 
-    * extension string chronologically. */
-   uint16_t year;
-};
-
-
-/**
- * Given a member \c x of struct gl_extensions, return offset of
- * \c x in bytes.
- */
-#define o(x) offsetof(struct gl_extensions, x)
-
-
-/**
- * \brief Table of supported OpenGL extensions for all API's.
- *
- * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
- */
-static const struct extension extension_table[] = {
-   /* ARB Extensions */
-   { "GL_ARB_ES2_compatibility",                   o(ARB_ES2_compatibility),                   GL,             2009 },
-   { "GL_ARB_blend_func_extended",                 o(ARB_blend_func_extended),                 GL,             2009 },
-   { "GL_ARB_color_buffer_float",                  o(ARB_color_buffer_float),                  GL,             2004 },
-   { "GL_ARB_copy_buffer",                         o(ARB_copy_buffer),                         GL,             2008 },
-   { "GL_ARB_depth_buffer_float",                  o(ARB_depth_buffer_float),                  GL,             2008 },
-   { "GL_ARB_depth_clamp",                         o(ARB_depth_clamp),                         GL,             2003 },
-   { "GL_ARB_depth_texture",                       o(ARB_depth_texture),                       GL,             2001 },
-   { "GL_ARB_draw_buffers",                        o(ARB_draw_buffers),                        GL,             2002 },
-   { "GL_ARB_draw_buffers_blend",                  o(ARB_draw_buffers_blend),                  GL,             2009 },
-   { "GL_ARB_draw_elements_base_vertex",           o(ARB_draw_elements_base_vertex),           GL,             2009 },
-   { "GL_ARB_draw_instanced",                      o(ARB_draw_instanced),                      GL,             2008 },
-   { "GL_ARB_explicit_attrib_location",            o(ARB_explicit_attrib_location),            GL,             2009 },
-   { "GL_ARB_fragment_coord_conventions",          o(ARB_fragment_coord_conventions),          GL,             2009 },
-   { "GL_ARB_fragment_program",                    o(ARB_fragment_program),                    GL,             2002 },
-   { "GL_ARB_fragment_program_shadow",             o(ARB_fragment_program_shadow),             GL,             2003 },
-   { "GL_ARB_fragment_shader",                     o(ARB_fragment_shader),                     GL,             2002 },
-   { "GL_ARB_framebuffer_object",                  o(ARB_framebuffer_object),                  GL,             2005 },
-   { "GL_ARB_framebuffer_sRGB",                    o(EXT_framebuffer_sRGB),                    GL,             1998 },
-   { "GL_ARB_half_float_pixel",                    o(ARB_half_float_pixel),                    GL,             2003 },
-   { "GL_ARB_half_float_vertex",                   o(ARB_half_float_vertex),                   GL,             2008 },
-   { "GL_ARB_instanced_arrays",                    o(ARB_instanced_arrays),                    GL,             2008 },
-   { "GL_ARB_map_buffer_range",                    o(ARB_map_buffer_range),                    GL,             2008 },
-   { "GL_ARB_multisample",                         o(ARB_multisample),                         GL,             1994 },
-   { "GL_ARB_multitexture",                        o(ARB_multitexture),                        GL,             1998 },
-   { "GL_ARB_occlusion_query2",                    o(ARB_occlusion_query2),                    GL,             2003 },
-   { "GL_ARB_occlusion_query",                     o(ARB_occlusion_query),                     GL,             2001 },
-   { "GL_ARB_pixel_buffer_object",                 o(EXT_pixel_buffer_object),                 GL,             2004 },
-   { "GL_ARB_point_parameters",                    o(EXT_point_parameters),                    GL,             1997 },
-   { "GL_ARB_point_sprite",                        o(ARB_point_sprite),                        GL,             2003 },
-   { "GL_ARB_provoking_vertex",                    o(EXT_provoking_vertex),                    GL,             2009 },
-   { "GL_ARB_robustness",                          o(dummy_true),                              GL,             2010 },
-   { "GL_ARB_sampler_objects",                     o(ARB_sampler_objects),                     GL,             2009 },
-   { "GL_ARB_seamless_cube_map",                   o(ARB_seamless_cube_map),                   GL,             2009 },
-   { "GL_ARB_shader_objects",                      o(ARB_shader_objects),                      GL,             2002 },
-   { "GL_ARB_shader_stencil_export",               o(ARB_shader_stencil_export),               GL,             2009 },
-   { "GL_ARB_shader_texture_lod",                  o(ARB_shader_texture_lod),                  GL,             2009 },
-   { "GL_ARB_shading_language_100",                o(ARB_shading_language_100),                GL,             2003 },
-   { "GL_ARB_shadow_ambient",                      o(ARB_shadow_ambient),                      GL,             2001 },
-   { "GL_ARB_shadow",                              o(ARB_shadow),                              GL,             2001 },
-   { "GL_ARB_sync",                                o(ARB_sync),                                GL,             2003 },
-   { "GL_ARB_texture_border_clamp",                o(ARB_texture_border_clamp),                GL,             2000 },
-   { "GL_ARB_texture_buffer_object",               o(ARB_texture_buffer_object),               GL,             2008 },
-   { "GL_ARB_texture_compression",                 o(ARB_texture_compression),                 GL,             2000 },
-   { "GL_ARB_texture_compression_rgtc",            o(ARB_texture_compression_rgtc),            GL,             2004 },
-   { "GL_ARB_texture_cube_map",                    o(ARB_texture_cube_map),                    GL,             1999 },
-   { "GL_ARB_texture_env_add",                     o(EXT_texture_env_add),                     GL,             1999 },
-   { "GL_ARB_texture_env_combine",                 o(ARB_texture_env_combine),                 GL,             2001 },
-   { "GL_ARB_texture_env_crossbar",                o(ARB_texture_env_crossbar),                GL,             2001 },
-   { "GL_ARB_texture_env_dot3",                    o(ARB_texture_env_dot3),                    GL,             2001 },
-   { "GL_ARB_texture_float",                       o(ARB_texture_float),                       GL,             2004 },
-   { "GL_ARB_texture_mirrored_repeat",             o(ARB_texture_mirrored_repeat),             GL,             2001 },
-   { "GL_ARB_texture_multisample",                 o(ARB_texture_multisample),                 GL,             2009 },
-   { "GL_ARB_texture_non_power_of_two",            o(ARB_texture_non_power_of_two),            GL,             2003 },
-   { "GL_ARB_texture_rectangle",                   o(NV_texture_rectangle),                    GL,             2004 },
-   { "GL_ARB_texture_rgb10_a2ui",                  o(ARB_texture_rgb10_a2ui),                  GL,             2009 },
-   { "GL_ARB_texture_rg",                          o(ARB_texture_rg),                          GL,             2008 },
-   { "GL_ARB_texture_swizzle",                     o(EXT_texture_swizzle),                     GL,             2008 },
-   { "GL_ARB_transform_feedback2",                 o(ARB_transform_feedback2),                 GL,             2010 },
-   { "GL_ARB_transpose_matrix",                    o(ARB_transpose_matrix),                    GL,             1999 },
-   { "GL_ARB_uniform_buffer_object",               o(ARB_uniform_buffer_object),               GL,             2002 },
-   { "GL_ARB_vertex_array_bgra",                   o(EXT_vertex_array_bgra),                   GL,             2008 },
-   { "GL_ARB_vertex_array_object",                 o(ARB_vertex_array_object),                 GL,             2006 },
-   { "GL_ARB_vertex_buffer_object",                o(ARB_vertex_buffer_object),                GL,             2003 },
-   { "GL_ARB_vertex_program",                      o(ARB_vertex_program),                      GL,             2002 },
-   { "GL_ARB_vertex_shader",                       o(ARB_vertex_shader),                       GL,             2002 },
-   { "GL_ARB_vertex_type_2_10_10_10_rev",          o(ARB_vertex_type_2_10_10_10_rev),          GL,             2009 },
-   { "GL_ARB_window_pos",                          o(ARB_window_pos),                          GL,             2001 },
-   /* EXT extensions */
-   { "GL_EXT_abgr",                                o(EXT_abgr),                                GL,             1995 },
-   { "GL_EXT_bgra",                                o(EXT_bgra),                                GL,             1995 },
-   { "GL_EXT_blend_color",                         o(EXT_blend_color),                         GL,             1995 },
-   { "GL_EXT_blend_equation_separate",             o(EXT_blend_equation_separate),             GL,             2003 },
-   { "GL_EXT_blend_func_separate",                 o(EXT_blend_func_separate),                 GL,             1999 },
-   { "GL_EXT_blend_logic_op",                      o(EXT_blend_logic_op),                      GL,             1995 },
-   { "GL_EXT_blend_minmax",                        o(EXT_blend_minmax),                        GL | ES1 | ES2, 1995 },
-   { "GL_EXT_blend_subtract",                      o(EXT_blend_subtract),                      GL,             1995 },
-   { "GL_EXT_clip_volume_hint",                    o(EXT_clip_volume_hint),                    GL,             1996 },
-   { "GL_EXT_compiled_vertex_array",               o(EXT_compiled_vertex_array),               GL,             1996 },
-   { "GL_EXT_copy_texture",                        o(EXT_copy_texture),                        GL,             1995 },
-   { "GL_EXT_depth_bounds_test",                   o(EXT_depth_bounds_test),                   GL,             2002 },
-   { "GL_EXT_draw_buffers2",                       o(EXT_draw_buffers2),                       GL,             2006 },
-   { "GL_EXT_draw_instanced",                      o(ARB_draw_instanced),                      GL,             2006 },
-   { "GL_EXT_draw_range_elements",                 o(EXT_draw_range_elements),                 GL,             1997 },
-   { "GL_EXT_fog_coord",                           o(EXT_fog_coord),                           GL,             1999 },
-   { "GL_EXT_framebuffer_blit",                    o(EXT_framebuffer_blit),                    GL,             2005 },
-   { "GL_EXT_framebuffer_multisample",             o(EXT_framebuffer_multisample),             GL,             2005 },
-   { "GL_EXT_framebuffer_object",                  o(EXT_framebuffer_object),                  GL,             2000 },
-   { "GL_EXT_framebuffer_sRGB",                    o(EXT_framebuffer_sRGB),                    GL,             1998 },
-   { "GL_EXT_gpu_program_parameters",              o(EXT_gpu_program_parameters),              GL,             2006 },
-   { "GL_EXT_gpu_shader4",                         o(EXT_gpu_shader4),                         GL,             2006 },
-   { "GL_EXT_multi_draw_arrays",                   o(EXT_multi_draw_arrays),                   GL | ES1 | ES2, 1999 },
-   { "GL_EXT_packed_depth_stencil",                o(EXT_packed_depth_stencil),                GL,             2005 },
-   { "GL_EXT_packed_float",                        o(EXT_packed_float),                        GL,             2004 },
-   { "GL_EXT_packed_pixels",                       o(EXT_packed_pixels),                       GL,             1997 },
-   { "GL_EXT_paletted_texture",                    o(EXT_paletted_texture),                    GL,             1995 },
-   { "GL_EXT_pixel_buffer_object",                 o(EXT_pixel_buffer_object),                 GL,             2004 },
-   { "GL_EXT_point_parameters",                    o(EXT_point_parameters),                    GL,             1997 },
-   { "GL_EXT_polygon_offset",                      o(EXT_polygon_offset),                      GL,             1995 },
-   { "GL_EXT_provoking_vertex",                    o(EXT_provoking_vertex),                    GL,             2009 },
-   { "GL_EXT_rescale_normal",                      o(EXT_rescale_normal),                      GL,             1997 },
-   { "GL_EXT_secondary_color",                     o(EXT_secondary_color),                     GL,             1999 },
-   { "GL_EXT_separate_shader_objects",             o(EXT_separate_shader_objects),             GL,             2008 },
-   { "GL_EXT_separate_specular_color",             o(EXT_separate_specular_color),             GL,             1997 },
-   { "GL_EXT_shadow_funcs",                        o(EXT_shadow_funcs),                        GL,             2002 },
-   { "GL_EXT_shared_texture_palette",              o(EXT_shared_texture_palette),              GL,             2000 },
-   { "GL_EXT_stencil_two_side",                    o(EXT_stencil_two_side),                    GL,             2001 },
-   { "GL_EXT_stencil_wrap",                        o(EXT_stencil_wrap),                        GL,             2002 },
-   { "GL_EXT_subtexture",                          o(EXT_subtexture),                          GL,             1995 },
-   { "GL_EXT_texture3D",                           o(EXT_texture3D),                           GL,             1996 },
-   { "GL_EXT_texture_array",                       o(EXT_texture_array),                       GL,             2006 },
-   { "GL_EXT_texture_compression_dxt1",            o(EXT_texture_compression_s3tc),            GL | ES1 | ES2, 2004 },
-   { "GL_EXT_texture_compression_latc",            o(EXT_texture_compression_latc),            GL,             2006 },
-   { "GL_EXT_texture_compression_rgtc",            o(ARB_texture_compression_rgtc),            GL,             2004 },
-   { "GL_EXT_texture_compression_s3tc",            o(EXT_texture_compression_s3tc),            GL,             2000 },
-   { "GL_EXT_texture_cube_map",                    o(ARB_texture_cube_map),                    GL,             2001 },
-   { "GL_EXT_texture_edge_clamp",                  o(SGIS_texture_edge_clamp),                 GL,             1997 },
-   { "GL_EXT_texture_env_add",                     o(EXT_texture_env_add),                     GL,             1999 },
-   { "GL_EXT_texture_env_combine",                 o(EXT_texture_env_combine),                 GL,             2006 },
-   { "GL_EXT_texture_env_dot3",                    o(EXT_texture_env_dot3),                    GL,             2000 },
-   { "GL_EXT_texture_filter_anisotropic",          o(EXT_texture_filter_anisotropic),          GL | ES1 | ES2, 1999 },
-   { "GL_EXT_texture_format_BGRA8888",             o(EXT_texture_format_BGRA8888),                  ES1 | ES2, 2009 },
-   { "GL_EXT_texture_integer",                     o(EXT_texture_integer),                     GL,             2006 },
-   { "GL_EXT_texture_lod_bias",                    o(EXT_texture_lod_bias),                    GL | ES1,       1999 },
-   { "GL_EXT_texture_mirror_clamp",                o(EXT_texture_mirror_clamp),                GL,             2004 },
-   { "GL_EXT_texture_object",                      o(EXT_texture_object),                      GL,             1995 },
-   { "GL_EXT_texture",                             o(EXT_texture),                             GL,             1996 },
-   { "GL_EXT_texture_rectangle",                   o(NV_texture_rectangle),                    GL,             2004 },
-   { "GL_EXT_texture_shared_exponent",             o(EXT_texture_shared_exponent),             GL,             2004 },
-   { "GL_EXT_texture_snorm",                       o(EXT_texture_snorm),                       GL,             2009 },
-   { "GL_EXT_texture_sRGB",                        o(EXT_texture_sRGB),                        GL,             2004 },
-   { "GL_EXT_texture_sRGB_decode",                 o(EXT_texture_sRGB_decode),                        GL,      2006 },
-   { "GL_EXT_texture_swizzle",                     o(EXT_texture_swizzle),                     GL,             2008 },
-   { "GL_EXT_texture_type_2_10_10_10_REV",         o(dummy_true),                                         ES2, 2008 },
-   { "GL_EXT_timer_query",                         o(EXT_timer_query),                         GL,             2006 },
-   { "GL_EXT_transform_feedback",                  o(EXT_transform_feedback),                  GL,             2011 },
-   { "GL_EXT_vertex_array_bgra",                   o(EXT_vertex_array_bgra),                   GL,             2008 },
-   { "GL_EXT_vertex_array",                        o(EXT_vertex_array),                        GL,             1995 },
-   { "GL_EXT_vertex_array_set",                    o(EXT_vertex_array_set),                    GL,             1997 },
-
-   /* OES extensions */
-   { "GL_OES_blend_equation_separate",             o(EXT_blend_equation_separate),                  ES1,       2009 },
-   { "GL_OES_blend_func_separate",                 o(EXT_blend_func_separate),                      ES1,       2009 },
-   { "GL_OES_blend_subtract",                      o(EXT_blend_subtract),                           ES1,       2009 },
-   { "GL_OES_byte_coordinates",                    o(dummy_true),                                   ES1,       2002 },
-   { "GL_OES_compressed_paletted_texture",         o(dummy_false),                     DISABLE,                2003 },
-   { "GL_OES_depth24",                             o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },
-   { "GL_OES_depth32",                             o(dummy_false),                     DISABLE,                2005 },
-   { "GL_OES_depth_texture",                       o(ARB_depth_texture),                                  ES2, 2006 },
-#if FEATURE_OES_draw_texture
-   { "GL_OES_draw_texture",                        o(OES_draw_texture),                             ES1 | ES2, 2004 },
-#endif
-#if FEATURE_OES_EGL_image
-   /*  FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
-   { "GL_OES_EGL_image",                           o(OES_EGL_image),                           GL | ES1 | ES2, 2006 },
-#endif
-   { "GL_OES_element_index_uint",                  o(EXT_vertex_array),                             ES1 | ES2, 2005 },
-   { "GL_OES_fbo_render_mipmap",                   o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },
-   { "GL_OES_fixed_point",                         o(dummy_true),                                   ES1,       2002 },
-   { "GL_OES_framebuffer_object",                  o(EXT_framebuffer_object),                       ES1,       2005 },
-   { "GL_OES_mapbuffer",                           o(ARB_vertex_buffer_object),                     ES1 | ES2, 2005 },
-   { "GL_OES_matrix_get",                          o(dummy_true),                                   ES1,       2004 },
-   { "GL_OES_packed_depth_stencil",                o(EXT_packed_depth_stencil),                     ES1 | ES2, 2007 },
-   { "GL_OES_point_size_array",                    o(dummy_true),                                   ES1,       2004 },
-   { "GL_OES_point_sprite",                        o(ARB_point_sprite),                             ES1,       2004 },
-   { "GL_OES_query_matrix",                        o(dummy_true),                                   ES1,       2003 },
-   { "GL_OES_read_format",                         o(OES_read_format),                         GL | ES1,       2003 },
-   { "GL_OES_rgb8_rgba8",                          o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },
-   { "GL_OES_single_precision",                    o(dummy_true),                                   ES1,       2003 },
-   { "GL_OES_standard_derivatives",                o(OES_standard_derivatives),                           ES2, 2005 },
-   { "GL_OES_stencil1",                            o(dummy_false),                     DISABLE,                2005 },
-   { "GL_OES_stencil4",                            o(dummy_false),                     DISABLE,                2005 },
-   { "GL_OES_stencil8",                            o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },
-   { "GL_OES_stencil_wrap",                        o(EXT_stencil_wrap),                             ES1,       2002 },
-   { "GL_OES_texture_3D",                          o(EXT_texture3D),                                      ES2, 2005 },
-   { "GL_OES_texture_cube_map",                    o(ARB_texture_cube_map),                         ES1,       2007 },
-   { "GL_OES_texture_env_crossbar",                o(ARB_texture_env_crossbar),                     ES1,       2005 },
-   { "GL_OES_texture_mirrored_repeat",             o(ARB_texture_mirrored_repeat),                  ES1,       2005 },
-   { "GL_OES_texture_npot",                        o(ARB_texture_non_power_of_two),                       ES2, 2005 },
-
-   /* Vendor extensions */
-   { "GL_3DFX_texture_compression_FXT1",           o(TDFX_texture_compression_FXT1),           GL,             1999 },
-   { "GL_AMD_conservative_depth",                  o(AMD_conservative_depth),                  GL,             2009 },
-   { "GL_AMD_draw_buffers_blend",                  o(ARB_draw_buffers_blend),                  GL,             2009 },
-   { "GL_AMD_seamless_cubemap_per_texture",        o(AMD_seamless_cubemap_per_texture),        GL,             2009 },
-   { "GL_AMD_shader_stencil_export",               o(ARB_shader_stencil_export),               GL,             2009 },
-   { "GL_APPLE_client_storage",                    o(APPLE_client_storage),                    GL,             2002 },
-   { "GL_APPLE_object_purgeable",                  o(APPLE_object_purgeable),                  GL,             2006 },
-   { "GL_APPLE_packed_pixels",                     o(APPLE_packed_pixels),                     GL,             2002 },
-   { "GL_APPLE_vertex_array_object",               o(APPLE_vertex_array_object),               GL,             2002 },
-   { "GL_ATI_blend_equation_separate",             o(EXT_blend_equation_separate),             GL,             2003 },
-   { "GL_ATI_draw_buffers",                        o(ARB_draw_buffers),                        GL,             2002 },
-   { "GL_ATI_envmap_bumpmap",                      o(ATI_envmap_bumpmap),                      GL,             2001 },
-   { "GL_ATI_fragment_shader",                     o(ATI_fragment_shader),                     GL,             2001 },
-   { "GL_ATI_separate_stencil",                    o(ATI_separate_stencil),                    GL,             2006 },
-   { "GL_ATI_texture_compression_3dc",             o(ATI_texture_compression_3dc),             GL,             2004 },
-   { "GL_ATI_texture_env_combine3",                o(ATI_texture_env_combine3),                GL,             2002 },
-   { "GL_ATI_texture_float",                       o(ARB_texture_float),                       GL,             2002 },
-   { "GL_ATI_texture_mirror_once",                 o(ATI_texture_mirror_once),                 GL,             2006 },
-   { "GL_IBM_multimode_draw_arrays",               o(IBM_multimode_draw_arrays),               GL,             1998 },
-   { "GL_IBM_rasterpos_clip",                      o(IBM_rasterpos_clip),                      GL,             1996 },
-   { "GL_IBM_texture_mirrored_repeat",             o(ARB_texture_mirrored_repeat),             GL,             1998 },
-   { "GL_INGR_blend_func_separate",                o(EXT_blend_func_separate),                 GL,             1999 },
-   { "GL_MESA_pack_invert",                        o(MESA_pack_invert),                        GL,             2002 },
-   { "GL_MESA_resize_buffers",                     o(MESA_resize_buffers),                     GL,             1999 },
-   { "GL_MESA_texture_array",                      o(MESA_texture_array),                      GL,             2007 },
-   { "GL_MESA_texture_signed_rgba",                o(EXT_texture_snorm),                       GL,             2009 },
-   { "GL_MESA_window_pos",                         o(ARB_window_pos),                          GL,             2000 },
-   { "GL_MESA_ycbcr_texture",                      o(MESA_ycbcr_texture),                      GL,             2002 },
-   { "GL_NV_blend_square",                         o(NV_blend_square),                         GL,             1999 },
-   { "GL_NV_conditional_render",                   o(NV_conditional_render),                   GL,             2008 },
-   { "GL_NV_depth_clamp",                          o(ARB_depth_clamp),                         GL,             2001 },
-   { "GL_NV_fragment_program",                     o(NV_fragment_program),                     GL,             2001 },
-   { "GL_NV_fragment_program_option",              o(NV_fragment_program_option),              GL,             2005 },
-   { "GL_NV_light_max_exponent",                   o(NV_light_max_exponent),                   GL,             1999 },
-   { "GL_NV_packed_depth_stencil",                 o(EXT_packed_depth_stencil),                GL,             2000 },
-   { "GL_NV_point_sprite",                         o(NV_point_sprite),                         GL,             2001 },
-   { "GL_NV_primitive_restart",                    o(NV_primitive_restart),                    GL,             2002 },
-   { "GL_NV_texgen_reflection",                    o(NV_texgen_reflection),                    GL,             1999 },
-   { "GL_NV_texture_barrier",                      o(NV_texture_barrier),                      GL,             2009 },
-   { "GL_NV_texture_env_combine4",                 o(NV_texture_env_combine4),                 GL,             1999 },
-   { "GL_NV_texture_rectangle",                    o(NV_texture_rectangle),                    GL,             2000 },
-   { "GL_NV_vertex_program1_1",                    o(NV_vertex_program1_1),                    GL,             2001 },
-   { "GL_NV_vertex_program",                       o(NV_vertex_program),                       GL,             2000 },
-   { "GL_S3_s3tc",                                 o(S3_s3tc),                                 GL,             1999 },
-   { "GL_SGIS_generate_mipmap",                    o(SGIS_generate_mipmap),                    GL,             1997 },
-   { "GL_SGIS_texture_border_clamp",               o(ARB_texture_border_clamp),                GL,             1997 },
-   { "GL_SGIS_texture_edge_clamp",                 o(SGIS_texture_edge_clamp),                 GL,             1997 },
-   { "GL_SGIS_texture_lod",                        o(SGIS_texture_lod),                        GL,             1997 },
-   { "GL_SUN_multi_draw_arrays",                   o(EXT_multi_draw_arrays),                   GL,             1999 },
-
-   { 0, 0, 0, 0 },
-};
-
-
-/**
- * Given an extension name, lookup up the corresponding member of struct
- * gl_extensions and return that member's offset (in bytes).  If the name is
- * not found in the \c extension_table, return 0.
- *
- * \param name Name of extension.
- * \return Offset of member in struct gl_extensions.
- */
-static size_t
-name_to_offset(const char* name)
-{
-   const struct extension *i;
-
-   if (name == 0)
-      return 0;
-
-   for (i = extension_table; i->name != 0; ++i) {
-      if (strcmp(name, i->name) == 0)
-	 return i->offset;
-   }
-
-   return 0;
-}
-
-
-/**
- * \brief Extensions enabled by default.
- *
- * These extensions are enabled by _mesa_init_extensions().
- *
- * XXX: Should these defaults also apply to GLES?
- */
-static const size_t default_extensions[] = {
-   o(ARB_copy_buffer),
-   o(ARB_draw_buffers),
-   o(ARB_multisample),
-   o(ARB_texture_compression),
-   o(ARB_transpose_matrix),
-   o(ARB_vertex_buffer_object),
-   o(ARB_window_pos),
-
-   o(EXT_abgr),
-   o(EXT_bgra),
-   o(EXT_compiled_vertex_array),
-   o(EXT_copy_texture),
-   o(EXT_draw_range_elements),
-   o(EXT_multi_draw_arrays),
-   o(EXT_packed_pixels),
-   o(EXT_polygon_offset),
-   o(EXT_rescale_normal),
-   o(EXT_separate_specular_color),
-   o(EXT_subtexture),
-   o(EXT_texture),
-   o(EXT_texture3D),
-   o(EXT_texture_object),
-   o(EXT_vertex_array),
-
-   o(OES_read_format),
-   o(OES_standard_derivatives),
-
-   /* Vendor Extensions */
-   o(APPLE_packed_pixels),
-   o(IBM_multimode_draw_arrays),
-   o(IBM_rasterpos_clip),
-   o(NV_light_max_exponent),
-   o(NV_texgen_reflection),
-   o(SGIS_generate_mipmap),
-   o(SGIS_texture_edge_clamp),
-   o(SGIS_texture_lod),
-
-   0,
-};
-
-
-/**
- * Enable all extensions suitable for a software-only renderer.
- * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
- */
-void
-_mesa_enable_sw_extensions(struct gl_context *ctx)
-{
-   /*ctx->Extensions.ARB_copy_buffer = GL_TRUE;*/
-   ctx->Extensions.ARB_depth_clamp = GL_TRUE;
-   ctx->Extensions.ARB_depth_texture = GL_TRUE;
-   /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
-   ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
-   ctx->Extensions.ARB_draw_instanced = GL_TRUE;
-   ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
-   ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
-#if FEATURE_ARB_fragment_program
-   ctx->Extensions.ARB_fragment_program = GL_TRUE;
-   ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
-#endif
-#if FEATURE_ARB_fragment_shader
-   ctx->Extensions.ARB_fragment_shader = GL_TRUE;
-#endif
-#if FEATURE_ARB_framebuffer_object
-   ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
-#endif
-#if FEATURE_ARB_geometry_shader4 && 0
-   /* XXX re-enable when GLSL compiler again supports geometry shaders */
-   ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
-#endif
-   ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
-   ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
-   ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
-   ctx->Extensions.ARB_multitexture = GL_TRUE;
-#if FEATURE_queryobj
-   ctx->Extensions.ARB_occlusion_query = GL_TRUE;
-   ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
-#endif
-   ctx->Extensions.ARB_point_sprite = GL_TRUE;
-#if FEATURE_ARB_shader_objects
-   ctx->Extensions.ARB_shader_objects = GL_TRUE;
-   ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
-#endif
-#if FEATURE_ARB_shading_language_100
-   ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
-#endif
-   ctx->Extensions.ARB_shadow = GL_TRUE;
-   ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
-   ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
-   ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
-   ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
-   ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
-   ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
-   /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
-   ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
-   ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
-   ctx->Extensions.ARB_texture_rg = GL_TRUE;
-   ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
-   ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
-#if FEATURE_ARB_vertex_program
-   ctx->Extensions.ARB_vertex_program = GL_TRUE;
-#endif
-#if FEATURE_ARB_vertex_shader
-   ctx->Extensions.ARB_vertex_shader = GL_TRUE;
-#endif
-#if FEATURE_ARB_vertex_buffer_object
-   /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
-#endif
-#if FEATURE_ARB_sync
-   ctx->Extensions.ARB_sync = GL_TRUE;
-#endif
-   ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
-#if FEATURE_APPLE_object_purgeable
-   ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
-#endif
-   ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
-#if FEATURE_ATI_fragment_shader
-   ctx->Extensions.ATI_fragment_shader = GL_TRUE;
-#endif
-   ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;
-   ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
-   ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
-   ctx->Extensions.ATI_separate_stencil = GL_TRUE;
-   ctx->Extensions.EXT_blend_color = GL_TRUE;
-   ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
-   ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
-   ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
-   ctx->Extensions.EXT_blend_minmax = GL_TRUE;
-   ctx->Extensions.EXT_blend_subtract = GL_TRUE;
-   ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
-   ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
-   ctx->Extensions.EXT_fog_coord = GL_TRUE;
-#if FEATURE_EXT_framebuffer_object
-   ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
-#endif
-#if FEATURE_EXT_framebuffer_blit
-   ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
-#endif
-#if FEATURE_ARB_framebuffer_object
-   ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
-#endif
-   /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
-   ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
-   ctx->Extensions.EXT_paletted_texture = GL_TRUE;
-#if FEATURE_EXT_pixel_buffer_object
-   ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
-#endif
-   ctx->Extensions.EXT_point_parameters = GL_TRUE;
-   ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
-   ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
-   ctx->Extensions.EXT_secondary_color = GL_TRUE;
-   ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
-   ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
-   ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
-   ctx->Extensions.EXT_texture_array = GL_TRUE;
-   ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;
-   ctx->Extensions.EXT_texture_env_add = GL_TRUE;
-   ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
-   ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
-   ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
-   ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
-   ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE;
-#if FEATURE_EXT_texture_sRGB
-   ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
-   ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;
-#endif
-   ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
-#if FEATURE_EXT_transform_feedback
-   /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
-#endif
-   ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
-   /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
-   ctx->Extensions.MESA_pack_invert = GL_TRUE;
-   ctx->Extensions.MESA_resize_buffers = GL_TRUE;
-   ctx->Extensions.MESA_texture_array = GL_TRUE;
-   ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
-   ctx->Extensions.NV_blend_square = GL_TRUE;
-   ctx->Extensions.NV_conditional_render = GL_TRUE;
-   /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
-   ctx->Extensions.NV_point_sprite = GL_TRUE;
-   ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
-   ctx->Extensions.NV_texture_rectangle = GL_TRUE;
-   /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
-#if FEATURE_NV_vertex_program
-   ctx->Extensions.NV_vertex_program = GL_TRUE;
-   ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
-#endif
-#if FEATURE_NV_fragment_program
-   ctx->Extensions.NV_fragment_program = GL_TRUE;
-#endif
-#if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
-   ctx->Extensions.NV_fragment_program_option = GL_TRUE;
-#endif
-   /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
-   ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
-#if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
-   ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
-#endif
-#if FEATURE_texture_fxt1
-   _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
-#endif
-#if FEATURE_texture_s3tc
-   if (ctx->Mesa_DXTn) {
-      _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
-      _mesa_enable_extension(ctx, "GL_S3_s3tc");
-   }
-#endif
-}
-
-
-/**
- * Enable common EXT extensions in the ARB_imaging subset.
- */
-void
-_mesa_enable_imaging_extensions(struct gl_context *ctx)
-{
-   ctx->Extensions.EXT_blend_color = GL_TRUE;
-   ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
-   ctx->Extensions.EXT_blend_minmax = GL_TRUE;
-   ctx->Extensions.EXT_blend_subtract = GL_TRUE;
-}
-
-
-
-/**
- * Enable all OpenGL 1.3 features and extensions.
- * A convenience function to be called by drivers.
- */
-void
-_mesa_enable_1_3_extensions(struct gl_context *ctx)
-{
-   /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
-   ctx->Extensions.ARB_multitexture = GL_TRUE;
-   ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
-   /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
-   ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
-   ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
-   ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
-   ctx->Extensions.EXT_texture_env_add = GL_TRUE;
-   /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
-}
-
-
-
-/**
- * Enable all OpenGL 1.4 features and extensions.
- * A convenience function to be called by drivers.
- */
-void
-_mesa_enable_1_4_extensions(struct gl_context *ctx)
-{
-   ctx->Extensions.ARB_depth_texture = GL_TRUE;
-   ctx->Extensions.ARB_shadow = GL_TRUE;
-   ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
-   ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
-   ctx->Extensions.ARB_window_pos = GL_TRUE;
-   ctx->Extensions.EXT_blend_color = GL_TRUE;
-   ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
-   ctx->Extensions.EXT_blend_minmax = GL_TRUE;
-   ctx->Extensions.EXT_blend_subtract = GL_TRUE;
-   ctx->Extensions.EXT_fog_coord = GL_TRUE;
-   /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
-   ctx->Extensions.EXT_point_parameters = GL_TRUE;
-   ctx->Extensions.EXT_secondary_color = GL_TRUE;
-   ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
-   ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
-   /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
-}
-
-
-/**
- * Enable all OpenGL 1.5 features and extensions.
- * A convenience function to be called by drivers.
- */
-void
-_mesa_enable_1_5_extensions(struct gl_context *ctx)
-{
-   ctx->Extensions.ARB_occlusion_query = GL_TRUE;
-   /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
-   ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
-}
-
-
-/**
- * Enable all OpenGL 2.0 features and extensions.
- * A convenience function to be called by drivers.
- */
-void
-_mesa_enable_2_0_extensions(struct gl_context *ctx)
-{
-   /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
-#if FEATURE_ARB_fragment_shader
-   ctx->Extensions.ARB_fragment_shader = GL_TRUE;
-#endif
-   ctx->Extensions.ARB_point_sprite = GL_TRUE;
-   ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
-   ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
-#if FEATURE_ARB_shader_objects
-   ctx->Extensions.ARB_shader_objects = GL_TRUE;
-#endif
-#if FEATURE_ARB_shading_language_100
-   ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
-#endif
-   ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
-#if FEATURE_ARB_vertex_shader
-   ctx->Extensions.ARB_vertex_shader = GL_TRUE;
-#endif
-}
-
-
-/**
- * Enable all OpenGL 2.1 features and extensions.
- * A convenience function to be called by drivers.
- */
-void
-_mesa_enable_2_1_extensions(struct gl_context *ctx)
-{
-#if FEATURE_EXT_pixel_buffer_object
-   ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
-#endif
-#if FEATURE_EXT_texture_sRGB
-   ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
-#endif
-}
-
-
-/**
- * Either enable or disable the named extension.
- * \return GL_TRUE for success, GL_FALSE if invalid extension name
- */
-static GLboolean
-set_extension( struct gl_context *ctx, const char *name, GLboolean state )
-{
-   size_t offset;
-
-   if (ctx->Extensions.String) {
-      /* The string was already queried - can't change it now! */
-      _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
-      return GL_FALSE;
-   }
-
-   offset = name_to_offset(name);
-   if (offset == 0) {
-      _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
-	            name);
-      return GL_FALSE;
-   } else if (offset == o(dummy_true) && state == GL_FALSE) {
-      _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
-	                  "%s", name);
-      return GL_FALSE;
-   } else {
-      GLboolean *base = (GLboolean *) &ctx->Extensions;
-      base[offset] = state;
-      return GL_TRUE;
-   }
-}
-
-
-/**
- * Enable the named extension.
- * Typically called by drivers.
- */
-void
-_mesa_enable_extension( struct gl_context *ctx, const char *name )
-{
-   if (!set_extension(ctx, name, GL_TRUE))
-      _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
-}
-
-
-/**
- * Disable the named extension.
- * XXX is this really needed???
- */
-void
-_mesa_disable_extension( struct gl_context *ctx, const char *name )
-{
-   if (!set_extension(ctx, name, GL_FALSE))
-      _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
-}
-
-
-/**
- * Test if the named extension is enabled in this context.
- */
-GLboolean
-_mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
-{
-   size_t offset;
-   GLboolean *base;
-
-   if (name == 0)
-      return GL_FALSE;
-
-   offset = name_to_offset(name);
-   if (offset == 0)
-      return GL_FALSE;
-   base = (GLboolean *) &ctx->Extensions;
-   return base[offset];
-}
-
-
-/**
- * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
- *
- * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
- * enable or disable. The list is processed thus:
- *    - Enable recognized extension names that are prefixed with '+'.
- *    - Disable recognized extension names that are prefixed with '-'.
- *    - Enable recognized extension names that are not prefixed.
- *    - Collect unrecognized extension names in a new string.
- *
- * \return Space-separated list of unrecognized extension names (which must
- *    be freed). Does not return \c NULL.
- */
-static char *
-get_extension_override( struct gl_context *ctx )
-{
-   const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
-   char *env;
-   char *ext;
-   char *extra_exts;
-   int len;
-
-   if (env_const == NULL) {
-      /* Return the empty string rather than NULL. This simplifies the logic
-       * of client functions. */
-      return calloc(1, sizeof(char));
-   }
-
-   /* extra_exts: List of unrecognized extensions. */
-   extra_exts = calloc(strlen(env_const), sizeof(char));
-
-   /* Copy env_const because strtok() is destructive. */
-   env = strdup(env_const);
-   for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {
-      int enable;
-      int recognized;
-      switch (ext[0]) {
-      case '+':
-         enable = 1;
-         ++ext;
-         break;
-      case '-':
-         enable = 0;
-         ++ext;
-         break;
-      default:
-         enable = 1;
-         break;
-      }
-      recognized = set_extension(ctx, ext, enable);
-      if (!recognized) {
-         strcat(extra_exts, ext);
-         strcat(extra_exts, " ");
-      }
-   }
-
-   /* Remove trailing space. */
-   len = strlen(extra_exts);
-   if (extra_exts[len - 1] == ' ')
-      extra_exts[len - 1] = '\0';
-
-   return extra_exts;
-}
-
-
-/**
- * \brief Initialize extension tables and enable default extensions.
- *
- * This should be called during context initialization.
- * Note: Sets gl_extensions.dummy_true to true.
- */
-void
-_mesa_init_extensions( struct gl_context *ctx )
-{
-   GLboolean *base = (GLboolean *) &ctx->Extensions;
-   GLboolean *sentinel = base + o(extension_sentinel);
-   GLboolean *i;
-   const size_t *j;
-
-   /* First, turn all extensions off. */
-   for (i = base; i != sentinel; ++i)
-      *i = GL_FALSE;
-
-   /* Then, selectively turn default extensions on. */
-   ctx->Extensions.dummy_true = GL_TRUE;
-   for (j = default_extensions; *j != 0; ++j)
-      base[*j] = GL_TRUE;
-}
-
-
-typedef unsigned short extension_index;
-
-
-/**
- * Compare two entries of the extensions table.  Sorts first by year,
- * then by name.
- *
- * Arguments are indices into extension_table.
- */
-static int
-extension_compare(const void *p1, const void *p2)
-{
-   extension_index i1 = * (const extension_index *) p1;
-   extension_index i2 = * (const extension_index *) p2;
-   const struct extension *e1 = &extension_table[i1];
-   const struct extension *e2 = &extension_table[i2];
-   int res;
-
-   res = (int)e1->year - (int)e2->year;
-
-   if (res == 0) {
-      res = strcmp(e1->name, e2->name);
-   }
-
-   return res;
-}
-
-
-/**
- * Construct the GL_EXTENSIONS string.  Called the first time that
- * glGetString(GL_EXTENSIONS) is called.
- */
-GLubyte*
-_mesa_make_extension_string(struct gl_context *ctx)
-{
-   /* The extension string. */
-   char *exts = 0;
-   /* Length of extension string. */
-   size_t length = 0;
-   /* Number of extensions */
-   unsigned count;
-   /* Indices of the extensions sorted by year */
-   extension_index *extension_indices;
-   /* String of extra extensions. */
-   char *extra_extensions = get_extension_override(ctx);
-   GLboolean *base = (GLboolean *) &ctx->Extensions;
-   const struct extension *i;
-   unsigned j;
-   unsigned maxYear = ~0;
-
-   /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */
-   {
-      const char *env = getenv("MESA_EXTENSION_MAX_YEAR");
-      if (env) {
-         maxYear = atoi(env);
-         _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n",
-                     maxYear);
-      }
-   }
-
-   /* Compute length of the extension string. */
-   count = 0;
-   for (i = extension_table; i->name != 0; ++i) {
-      if (base[i->offset] &&
-          i->year <= maxYear &&
-          (i->api_set & (1 << ctx->API))) {
-	 length += strlen(i->name) + 1; /* +1 for space */
-	 ++count;
-      }
-   }
-   if (extra_extensions != NULL)
-      length += 1 + strlen(extra_extensions); /* +1 for space */
-
-   exts = (char *) calloc(length + 1, sizeof(char));
-   if (exts == NULL) {
-      free(extra_extensions);
-      return NULL;
-   }
-
-   extension_indices = malloc(count * sizeof(extension_index));
-   if (extension_indices == NULL) {
-      free(exts);
-      free(extra_extensions);
-      return NULL;
-   }
-
-   /* Sort extensions in chronological order because certain old applications (e.g.,
-    * Quake3 demo) store the extension list in a static size buffer so chronologically
-    * order ensure that the extensions that such applications expect will fit into
-    * that buffer.
-    */
-   j = 0;
-   for (i = extension_table; i->name != 0; ++i) {
-      if (base[i->offset] &&
-          i->year <= maxYear &&
-          (i->api_set & (1 << ctx->API))) {
-         extension_indices[j++] = i - extension_table;
-      }
-   }
-   assert(j == count);
-   qsort(extension_indices, count, sizeof *extension_indices, extension_compare);
-
-   /* Build the extension string.*/
-   for (j = 0; j < count; ++j) {
-      i = &extension_table[extension_indices[j]];
-      assert(base[i->offset] && (i->api_set & (1 << ctx->API)));
-      strcat(exts, i->name);
-      strcat(exts, " ");
-   }
-   free(extension_indices);
-   if (extra_extensions != 0) {
-      strcat(exts, extra_extensions);
-      free(extra_extensions);
-   }
-
-   return (GLubyte *) exts;
-}
-
-/**
- * Return number of enabled extensions.
- */
-GLuint
-_mesa_get_extension_count(struct gl_context *ctx)
-{
-   GLboolean *base;
-   const struct extension *i;
-
-   /* only count once */
-   if (ctx->Extensions.Count != 0)
-      return ctx->Extensions.Count;
-
-   base = (GLboolean *) &ctx->Extensions;
-   for (i = extension_table; i->name != 0; ++i) {
-      if (base[i->offset]) {
-	 ctx->Extensions.Count++;
-      }
-   }
-   return ctx->Extensions.Count;
-}
-
-/**
- * Return name of i-th enabled extension
- */
-const GLubyte *
-_mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
-{
-   const GLboolean *base;
-   size_t n;
-   const struct extension *i;
-
-   if (index < 0)
-      return NULL;
-
-   base = (GLboolean*) &ctx->Extensions;
-   n = 0;
-   for (i = extension_table; i->name != 0; ++i) {
-      if (n == index && base[i->offset]) {
-	 return (GLubyte*) i->name;
-      } else if (base[i->offset]) {
-	 ++n;
-      }
-   }
-
-   return NULL;
-}
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.6

+ *

+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.

+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is 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 Software.

+ *

+ * THE SOFTWARE IS 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

+ * BRIAN PAUL 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 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ */

+

+

+/**

+ * \file

+ * \brief Extension handling

+ */

+

+

+#include "glheader.h"

+#include "imports.h"

+#include "context.h"

+#include "extensions.h"

+#include "mfeatures.h"

+#include "mtypes.h"

+

+enum {

+   DISABLE = 0,

+   GL  = 1 << API_OPENGL,

+   ES1 = 1 << API_OPENGLES,

+   ES2 = 1 << API_OPENGLES2,

+};

+

+/**

+ * \brief An element of the \c extension_table.

+ */

+struct extension {

+   /** Name of extension, such as "GL_ARB_depth_clamp". */

+   const char *name;

+

+   /** Offset (in bytes) of the corresponding member in struct gl_extensions. */

+   size_t offset;

+

+   /** Set of API's in which the extension exists, as a bitset. */

+   uint8_t api_set;

+

+   /** Year the extension was proposed or approved.  Used to sort the 

+    * extension string chronologically. */

+   uint16_t year;

+};

+

+

+/**

+ * Given a member \c x of struct gl_extensions, return offset of

+ * \c x in bytes.

+ */

+#define o(x) offsetof(struct gl_extensions, x)

+

+

+/**

+ * \brief Table of supported OpenGL extensions for all API's.

+ *

+ * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.

+ */

+static const struct extension extension_table[] = {

+   /* ARB Extensions */

+   { "GL_ARB_ES2_compatibility",                   o(ARB_ES2_compatibility),                   GL,             2009 },

+   { "GL_ARB_blend_func_extended",                 o(ARB_blend_func_extended),                 GL,             2009 },

+   { "GL_ARB_color_buffer_float",                  o(ARB_color_buffer_float),                  GL,             2004 },

+   { "GL_ARB_copy_buffer",                         o(ARB_copy_buffer),                         GL,             2008 },

+   { "GL_ARB_depth_buffer_float",                  o(ARB_depth_buffer_float),                  GL,             2008 },

+   { "GL_ARB_depth_clamp",                         o(ARB_depth_clamp),                         GL,             2003 },

+   { "GL_ARB_depth_texture",                       o(ARB_depth_texture),                       GL,             2001 },

+   { "GL_ARB_draw_buffers",                        o(ARB_draw_buffers),                        GL,             2002 },

+   { "GL_ARB_draw_buffers_blend",                  o(ARB_draw_buffers_blend),                  GL,             2009 },

+   { "GL_ARB_draw_elements_base_vertex",           o(ARB_draw_elements_base_vertex),           GL,             2009 },

+   { "GL_ARB_draw_instanced",                      o(ARB_draw_instanced),                      GL,             2008 },

+   { "GL_ARB_explicit_attrib_location",            o(ARB_explicit_attrib_location),            GL,             2009 },

+   { "GL_ARB_fragment_coord_conventions",          o(ARB_fragment_coord_conventions),          GL,             2009 },

+   { "GL_ARB_fragment_program",                    o(ARB_fragment_program),                    GL,             2002 },

+   { "GL_ARB_fragment_program_shadow",             o(ARB_fragment_program_shadow),             GL,             2003 },

+   { "GL_ARB_fragment_shader",                     o(ARB_fragment_shader),                     GL,             2002 },

+   { "GL_ARB_framebuffer_object",                  o(ARB_framebuffer_object),                  GL,             2005 },

+   { "GL_ARB_framebuffer_sRGB",                    o(EXT_framebuffer_sRGB),                    GL,             1998 },

+   { "GL_ARB_half_float_pixel",                    o(ARB_half_float_pixel),                    GL,             2003 },

+   { "GL_ARB_half_float_vertex",                   o(ARB_half_float_vertex),                   GL,             2008 },

+   { "GL_ARB_instanced_arrays",                    o(ARB_instanced_arrays),                    GL,             2008 },

+   { "GL_ARB_map_buffer_range",                    o(ARB_map_buffer_range),                    GL,             2008 },

+   { "GL_ARB_multisample",                         o(ARB_multisample),                         GL,             1994 },

+   { "GL_ARB_multitexture",                        o(ARB_multitexture),                        GL,             1998 },

+   { "GL_ARB_occlusion_query2",                    o(ARB_occlusion_query2),                    GL,             2003 },

+   { "GL_ARB_occlusion_query",                     o(ARB_occlusion_query),                     GL,             2001 },

+   { "GL_ARB_pixel_buffer_object",                 o(EXT_pixel_buffer_object),                 GL,             2004 },

+   { "GL_ARB_point_parameters",                    o(EXT_point_parameters),                    GL,             1997 },

+   { "GL_ARB_point_sprite",                        o(ARB_point_sprite),                        GL,             2003 },

+   { "GL_ARB_provoking_vertex",                    o(EXT_provoking_vertex),                    GL,             2009 },

+   { "GL_ARB_robustness",                          o(dummy_true),                              GL,             2010 },

+   { "GL_ARB_sampler_objects",                     o(ARB_sampler_objects),                     GL,             2009 },

+   { "GL_ARB_seamless_cube_map",                   o(ARB_seamless_cube_map),                   GL,             2009 },

+   { "GL_ARB_shader_objects",                      o(ARB_shader_objects),                      GL,             2002 },

+   { "GL_ARB_shader_stencil_export",               o(ARB_shader_stencil_export),               GL,             2009 },

+   { "GL_ARB_shader_texture_lod",                  o(ARB_shader_texture_lod),                  GL,             2009 },

+   { "GL_ARB_shading_language_100",                o(ARB_shading_language_100),                GL,             2003 },

+   { "GL_ARB_shadow_ambient",                      o(ARB_shadow_ambient),                      GL,             2001 },

+   { "GL_ARB_shadow",                              o(ARB_shadow),                              GL,             2001 },

+   { "GL_ARB_sync",                                o(ARB_sync),                                GL,             2003 },

+   { "GL_ARB_texture_border_clamp",                o(ARB_texture_border_clamp),                GL,             2000 },

+   { "GL_ARB_texture_buffer_object",               o(ARB_texture_buffer_object),               GL,             2008 },

+   { "GL_ARB_texture_compression",                 o(ARB_texture_compression),                 GL,             2000 },

+   { "GL_ARB_texture_compression_rgtc",            o(ARB_texture_compression_rgtc),            GL,             2004 },

+   { "GL_ARB_texture_cube_map",                    o(ARB_texture_cube_map),                    GL,             1999 },

+   { "GL_ARB_texture_env_add",                     o(EXT_texture_env_add),                     GL,             1999 },

+   { "GL_ARB_texture_env_combine",                 o(ARB_texture_env_combine),                 GL,             2001 },

+   { "GL_ARB_texture_env_crossbar",                o(ARB_texture_env_crossbar),                GL,             2001 },

+   { "GL_ARB_texture_env_dot3",                    o(ARB_texture_env_dot3),                    GL,             2001 },

+   { "GL_ARB_texture_float",                       o(ARB_texture_float),                       GL,             2004 },

+   { "GL_ARB_texture_mirrored_repeat",             o(ARB_texture_mirrored_repeat),             GL,             2001 },

+   { "GL_ARB_texture_multisample",                 o(ARB_texture_multisample),                 GL,             2009 },

+   { "GL_ARB_texture_non_power_of_two",            o(ARB_texture_non_power_of_two),            GL,             2003 },

+   { "GL_ARB_texture_rectangle",                   o(NV_texture_rectangle),                    GL,             2004 },

+   { "GL_ARB_texture_rgb10_a2ui",                  o(ARB_texture_rgb10_a2ui),                  GL,             2009 },

+   { "GL_ARB_texture_rg",                          o(ARB_texture_rg),                          GL,             2008 },

+   { "GL_ARB_texture_swizzle",                     o(EXT_texture_swizzle),                     GL,             2008 },

+   { "GL_ARB_transform_feedback2",                 o(ARB_transform_feedback2),                 GL,             2010 },

+   { "GL_ARB_transpose_matrix",                    o(ARB_transpose_matrix),                    GL,             1999 },

+   { "GL_ARB_uniform_buffer_object",               o(ARB_uniform_buffer_object),               GL,             2002 },

+   { "GL_ARB_vertex_array_bgra",                   o(EXT_vertex_array_bgra),                   GL,             2008 },

+   { "GL_ARB_vertex_array_object",                 o(ARB_vertex_array_object),                 GL,             2006 },

+   { "GL_ARB_vertex_buffer_object",                o(ARB_vertex_buffer_object),                GL,             2003 },

+   { "GL_ARB_vertex_program",                      o(ARB_vertex_program),                      GL,             2002 },

+   { "GL_ARB_vertex_shader",                       o(ARB_vertex_shader),                       GL,             2002 },

+   { "GL_ARB_vertex_type_2_10_10_10_rev",          o(ARB_vertex_type_2_10_10_10_rev),          GL,             2009 },

+   { "GL_ARB_window_pos",                          o(ARB_window_pos),                          GL,             2001 },

+   /* EXT extensions */

+   { "GL_EXT_abgr",                                o(EXT_abgr),                                GL,             1995 },

+   { "GL_EXT_bgra",                                o(EXT_bgra),                                GL,             1995 },

+   { "GL_EXT_blend_color",                         o(EXT_blend_color),                         GL,             1995 },

+   { "GL_EXT_blend_equation_separate",             o(EXT_blend_equation_separate),             GL,             2003 },

+   { "GL_EXT_blend_func_separate",                 o(EXT_blend_func_separate),                 GL,             1999 },

+   { "GL_EXT_blend_logic_op",                      o(EXT_blend_logic_op),                      GL,             1995 },

+   { "GL_EXT_blend_minmax",                        o(EXT_blend_minmax),                        GL | ES1 | ES2, 1995 },

+   { "GL_EXT_blend_subtract",                      o(EXT_blend_subtract),                      GL,             1995 },

+   { "GL_EXT_clip_volume_hint",                    o(EXT_clip_volume_hint),                    GL,             1996 },

+   { "GL_EXT_compiled_vertex_array",               o(EXT_compiled_vertex_array),               GL,             1996 },

+   { "GL_EXT_copy_texture",                        o(EXT_copy_texture),                        GL,             1995 },

+   { "GL_EXT_depth_bounds_test",                   o(EXT_depth_bounds_test),                   GL,             2002 },

+   { "GL_EXT_draw_buffers2",                       o(EXT_draw_buffers2),                       GL,             2006 },

+   { "GL_EXT_draw_instanced",                      o(ARB_draw_instanced),                      GL,             2006 },

+   { "GL_EXT_draw_range_elements",                 o(EXT_draw_range_elements),                 GL,             1997 },

+   { "GL_EXT_fog_coord",                           o(EXT_fog_coord),                           GL,             1999 },

+   { "GL_EXT_framebuffer_blit",                    o(EXT_framebuffer_blit),                    GL,             2005 },

+   { "GL_EXT_framebuffer_multisample",             o(EXT_framebuffer_multisample),             GL,             2005 },

+   { "GL_EXT_framebuffer_object",                  o(EXT_framebuffer_object),                  GL,             2000 },

+   { "GL_EXT_framebuffer_sRGB",                    o(EXT_framebuffer_sRGB),                    GL,             1998 },

+   { "GL_EXT_gpu_program_parameters",              o(EXT_gpu_program_parameters),              GL,             2006 },

+   { "GL_EXT_gpu_shader4",                         o(EXT_gpu_shader4),                         GL,             2006 },

+   { "GL_EXT_multi_draw_arrays",                   o(EXT_multi_draw_arrays),                   GL | ES1 | ES2, 1999 },

+   { "GL_EXT_packed_depth_stencil",                o(EXT_packed_depth_stencil),                GL,             2005 },

+   { "GL_EXT_packed_float",                        o(EXT_packed_float),                        GL,             2004 },

+   { "GL_EXT_packed_pixels",                       o(EXT_packed_pixels),                       GL,             1997 },

+   { "GL_EXT_paletted_texture",                    o(EXT_paletted_texture),                    GL,             1995 },

+   { "GL_EXT_pixel_buffer_object",                 o(EXT_pixel_buffer_object),                 GL,             2004 },

+   { "GL_EXT_point_parameters",                    o(EXT_point_parameters),                    GL,             1997 },

+   { "GL_EXT_polygon_offset",                      o(EXT_polygon_offset),                      GL,             1995 },

+   { "GL_EXT_provoking_vertex",                    o(EXT_provoking_vertex),                    GL,             2009 },

+   { "GL_EXT_rescale_normal",                      o(EXT_rescale_normal),                      GL,             1997 },

+   { "GL_EXT_secondary_color",                     o(EXT_secondary_color),                     GL,             1999 },

+   { "GL_EXT_separate_shader_objects",             o(EXT_separate_shader_objects),             GL,             2008 },

+   { "GL_EXT_separate_specular_color",             o(EXT_separate_specular_color),             GL,             1997 },

+   { "GL_EXT_shadow_funcs",                        o(EXT_shadow_funcs),                        GL,             2002 },

+   { "GL_EXT_shared_texture_palette",              o(EXT_shared_texture_palette),              GL,             2000 },

+   { "GL_EXT_stencil_two_side",                    o(EXT_stencil_two_side),                    GL,             2001 },

+   { "GL_EXT_stencil_wrap",                        o(EXT_stencil_wrap),                        GL,             2002 },

+   { "GL_EXT_subtexture",                          o(EXT_subtexture),                          GL,             1995 },

+   { "GL_EXT_texture3D",                           o(EXT_texture3D),                           GL,             1996 },

+   { "GL_EXT_texture_array",                       o(EXT_texture_array),                       GL,             2006 },

+   { "GL_EXT_texture_compression_dxt1",            o(EXT_texture_compression_s3tc),            GL | ES1 | ES2, 2004 },

+   { "GL_EXT_texture_compression_latc",            o(EXT_texture_compression_latc),            GL,             2006 },

+   { "GL_EXT_texture_compression_rgtc",            o(ARB_texture_compression_rgtc),            GL,             2004 },

+   { "GL_EXT_texture_compression_s3tc",            o(EXT_texture_compression_s3tc),            GL,             2000 },

+   { "GL_EXT_texture_cube_map",                    o(ARB_texture_cube_map),                    GL,             2001 },

+   { "GL_EXT_texture_edge_clamp",                  o(SGIS_texture_edge_clamp),                 GL,             1997 },

+   { "GL_EXT_texture_env_add",                     o(EXT_texture_env_add),                     GL,             1999 },

+   { "GL_EXT_texture_env_combine",                 o(EXT_texture_env_combine),                 GL,             2006 },

+   { "GL_EXT_texture_env_dot3",                    o(EXT_texture_env_dot3),                    GL,             2000 },

+   { "GL_EXT_texture_filter_anisotropic",          o(EXT_texture_filter_anisotropic),          GL | ES1 | ES2, 1999 },

+   { "GL_EXT_texture_format_BGRA8888",             o(EXT_texture_format_BGRA8888),                  ES1 | ES2, 2009 },

+   { "GL_EXT_texture_integer",                     o(EXT_texture_integer),                     GL,             2006 },

+   { "GL_EXT_texture_lod_bias",                    o(EXT_texture_lod_bias),                    GL | ES1,       1999 },

+   { "GL_EXT_texture_mirror_clamp",                o(EXT_texture_mirror_clamp),                GL,             2004 },

+   { "GL_EXT_texture_object",                      o(EXT_texture_object),                      GL,             1995 },

+   { "GL_EXT_texture",                             o(EXT_texture),                             GL,             1996 },

+   { "GL_EXT_texture_rectangle",                   o(NV_texture_rectangle),                    GL,             2004 },

+   { "GL_EXT_texture_shared_exponent",             o(EXT_texture_shared_exponent),             GL,             2004 },

+   { "GL_EXT_texture_snorm",                       o(EXT_texture_snorm),                       GL,             2009 },

+   { "GL_EXT_texture_sRGB",                        o(EXT_texture_sRGB),                        GL,             2004 },

+   { "GL_EXT_texture_sRGB_decode",                 o(EXT_texture_sRGB_decode),                        GL,      2006 },

+   { "GL_EXT_texture_swizzle",                     o(EXT_texture_swizzle),                     GL,             2008 },

+   { "GL_EXT_texture_type_2_10_10_10_REV",         o(dummy_true),                                         ES2, 2008 },

+   { "GL_EXT_timer_query",                         o(EXT_timer_query),                         GL,             2006 },

+   { "GL_EXT_transform_feedback",                  o(EXT_transform_feedback),                  GL,             2011 },

+   { "GL_EXT_vertex_array_bgra",                   o(EXT_vertex_array_bgra),                   GL,             2008 },

+   { "GL_EXT_vertex_array",                        o(EXT_vertex_array),                        GL,             1995 },

+   { "GL_EXT_vertex_array_set",                    o(EXT_vertex_array_set),                    GL,             1997 },

+

+   /* OES extensions */

+   { "GL_OES_blend_equation_separate",             o(EXT_blend_equation_separate),                  ES1,       2009 },

+   { "GL_OES_blend_func_separate",                 o(EXT_blend_func_separate),                      ES1,       2009 },

+   { "GL_OES_blend_subtract",                      o(EXT_blend_subtract),                           ES1,       2009 },

+   { "GL_OES_byte_coordinates",                    o(dummy_true),                                   ES1,       2002 },

+   { "GL_OES_compressed_paletted_texture",         o(dummy_false),                     DISABLE,                2003 },

+   { "GL_OES_depth24",                             o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },

+   { "GL_OES_depth32",                             o(dummy_false),                     DISABLE,                2005 },

+   { "GL_OES_depth_texture",                       o(ARB_depth_texture),                                  ES2, 2006 },

+#if FEATURE_OES_draw_texture

+   { "GL_OES_draw_texture",                        o(OES_draw_texture),                             ES1 | ES2, 2004 },

+#endif

+#if FEATURE_OES_EGL_image

+   /*  FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */

+   { "GL_OES_EGL_image",                           o(OES_EGL_image),                           GL | ES1 | ES2, 2006 },

+#endif

+   { "GL_OES_element_index_uint",                  o(EXT_vertex_array),                             ES1 | ES2, 2005 },

+   { "GL_OES_fbo_render_mipmap",                   o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },

+   { "GL_OES_fixed_point",                         o(dummy_true),                                   ES1,       2002 },

+   { "GL_OES_framebuffer_object",                  o(EXT_framebuffer_object),                       ES1,       2005 },

+   { "GL_OES_mapbuffer",                           o(ARB_vertex_buffer_object),                     ES1 | ES2, 2005 },

+   { "GL_OES_matrix_get",                          o(dummy_true),                                   ES1,       2004 },

+   { "GL_OES_packed_depth_stencil",                o(EXT_packed_depth_stencil),                     ES1 | ES2, 2007 },

+   { "GL_OES_point_size_array",                    o(dummy_true),                                   ES1,       2004 },

+   { "GL_OES_point_sprite",                        o(ARB_point_sprite),                             ES1,       2004 },

+   { "GL_OES_query_matrix",                        o(dummy_true),                                   ES1,       2003 },

+   { "GL_OES_read_format",                         o(OES_read_format),                         GL | ES1,       2003 },

+   { "GL_OES_rgb8_rgba8",                          o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },

+   { "GL_OES_single_precision",                    o(dummy_true),                                   ES1,       2003 },

+   { "GL_OES_standard_derivatives",                o(OES_standard_derivatives),                           ES2, 2005 },

+   { "GL_OES_stencil1",                            o(dummy_false),                     DISABLE,                2005 },

+   { "GL_OES_stencil4",                            o(dummy_false),                     DISABLE,                2005 },

+   { "GL_OES_stencil8",                            o(EXT_framebuffer_object),                       ES1 | ES2, 2005 },

+   { "GL_OES_stencil_wrap",                        o(EXT_stencil_wrap),                             ES1,       2002 },

+   { "GL_OES_texture_3D",                          o(EXT_texture3D),                                      ES2, 2005 },

+   { "GL_OES_texture_cube_map",                    o(ARB_texture_cube_map),                         ES1,       2007 },

+   { "GL_OES_texture_env_crossbar",                o(ARB_texture_env_crossbar),                     ES1,       2005 },

+   { "GL_OES_texture_mirrored_repeat",             o(ARB_texture_mirrored_repeat),                  ES1,       2005 },

+   { "GL_OES_texture_npot",                        o(ARB_texture_non_power_of_two),                       ES2, 2005 },

+

+   /* Vendor extensions */

+   { "GL_3DFX_texture_compression_FXT1",           o(TDFX_texture_compression_FXT1),           GL,             1999 },

+   { "GL_AMD_conservative_depth",                  o(AMD_conservative_depth),                  GL,             2009 },

+   { "GL_AMD_draw_buffers_blend",                  o(ARB_draw_buffers_blend),                  GL,             2009 },

+   { "GL_AMD_seamless_cubemap_per_texture",        o(AMD_seamless_cubemap_per_texture),        GL,             2009 },

+   { "GL_AMD_shader_stencil_export",               o(ARB_shader_stencil_export),               GL,             2009 },

+   { "GL_APPLE_client_storage",                    o(APPLE_client_storage),                    GL,             2002 },

+   { "GL_APPLE_object_purgeable",                  o(APPLE_object_purgeable),                  GL,             2006 },

+   { "GL_APPLE_packed_pixels",                     o(APPLE_packed_pixels),                     GL,             2002 },

+   { "GL_APPLE_vertex_array_object",               o(APPLE_vertex_array_object),               GL,             2002 },

+   { "GL_ATI_blend_equation_separate",             o(EXT_blend_equation_separate),             GL,             2003 },

+   { "GL_ATI_draw_buffers",                        o(ARB_draw_buffers),                        GL,             2002 },

+   { "GL_ATI_envmap_bumpmap",                      o(ATI_envmap_bumpmap),                      GL,             2001 },

+   { "GL_ATI_fragment_shader",                     o(ATI_fragment_shader),                     GL,             2001 },

+   { "GL_ATI_separate_stencil",                    o(ATI_separate_stencil),                    GL,             2006 },

+   { "GL_ATI_texture_compression_3dc",             o(ATI_texture_compression_3dc),             GL,             2004 },

+   { "GL_ATI_texture_env_combine3",                o(ATI_texture_env_combine3),                GL,             2002 },

+   { "GL_ATI_texture_float",                       o(ARB_texture_float),                       GL,             2002 },

+   { "GL_ATI_texture_mirror_once",                 o(ATI_texture_mirror_once),                 GL,             2006 },

+   { "GL_IBM_multimode_draw_arrays",               o(IBM_multimode_draw_arrays),               GL,             1998 },

+   { "GL_IBM_rasterpos_clip",                      o(IBM_rasterpos_clip),                      GL,             1996 },

+   { "GL_IBM_texture_mirrored_repeat",             o(ARB_texture_mirrored_repeat),             GL,             1998 },

+   { "GL_INGR_blend_func_separate",                o(EXT_blend_func_separate),                 GL,             1999 },

+   { "GL_MESA_pack_invert",                        o(MESA_pack_invert),                        GL,             2002 },

+   { "GL_MESA_resize_buffers",                     o(MESA_resize_buffers),                     GL,             1999 },

+   { "GL_MESA_texture_array",                      o(MESA_texture_array),                      GL,             2007 },

+   { "GL_MESA_texture_signed_rgba",                o(EXT_texture_snorm),                       GL,             2009 },

+   { "GL_MESA_window_pos",                         o(ARB_window_pos),                          GL,             2000 },

+   { "GL_MESA_ycbcr_texture",                      o(MESA_ycbcr_texture),                      GL,             2002 },

+   { "GL_NV_blend_square",                         o(NV_blend_square),                         GL,             1999 },

+   { "GL_NV_conditional_render",                   o(NV_conditional_render),                   GL,             2008 },

+   { "GL_NV_depth_clamp",                          o(ARB_depth_clamp),                         GL,             2001 },

+   { "GL_NV_fragment_program",                     o(NV_fragment_program),                     GL,             2001 },

+   { "GL_NV_fragment_program_option",              o(NV_fragment_program_option),              GL,             2005 },

+   { "GL_NV_light_max_exponent",                   o(NV_light_max_exponent),                   GL,             1999 },

+   { "GL_NV_packed_depth_stencil",                 o(EXT_packed_depth_stencil),                GL,             2000 },

+   { "GL_NV_point_sprite",                         o(NV_point_sprite),                         GL,             2001 },

+   { "GL_NV_primitive_restart",                    o(NV_primitive_restart),                    GL,             2002 },

+   { "GL_NV_texgen_reflection",                    o(NV_texgen_reflection),                    GL,             1999 },

+   { "GL_NV_texture_barrier",                      o(NV_texture_barrier),                      GL,             2009 },

+   { "GL_NV_texture_env_combine4",                 o(NV_texture_env_combine4),                 GL,             1999 },

+   { "GL_NV_texture_rectangle",                    o(NV_texture_rectangle),                    GL,             2000 },

+   { "GL_NV_vertex_program1_1",                    o(NV_vertex_program1_1),                    GL,             2001 },

+   { "GL_NV_vertex_program",                       o(NV_vertex_program),                       GL,             2000 },

+   { "GL_S3_s3tc",                                 o(S3_s3tc),                                 GL,             1999 },

+   { "GL_SGIS_generate_mipmap",                    o(SGIS_generate_mipmap),                    GL,             1997 },

+   { "GL_SGIS_texture_border_clamp",               o(ARB_texture_border_clamp),                GL,             1997 },

+   { "GL_SGIS_texture_edge_clamp",                 o(SGIS_texture_edge_clamp),                 GL,             1997 },

+   { "GL_SGIS_texture_lod",                        o(SGIS_texture_lod),                        GL,             1997 },

+   { "GL_SUN_multi_draw_arrays",                   o(EXT_multi_draw_arrays),                   GL,             1999 },

+

+   { 0, 0, 0, 0 },

+};

+

+

+/**

+ * Given an extension name, lookup up the corresponding member of struct

+ * gl_extensions and return that member's offset (in bytes).  If the name is

+ * not found in the \c extension_table, return 0.

+ *

+ * \param name Name of extension.

+ * \return Offset of member in struct gl_extensions.

+ */

+static size_t

+name_to_offset(const char* name)

+{

+   const struct extension *i;

+

+   if (name == 0)

+      return 0;

+

+   for (i = extension_table; i->name != 0; ++i) {

+      if (strcmp(name, i->name) == 0)

+	 return i->offset;

+   }

+

+   return 0;

+}

+

+

+/**

+ * \brief Extensions enabled by default.

+ *

+ * These extensions are enabled by _mesa_init_extensions().

+ *

+ * XXX: Should these defaults also apply to GLES?

+ */

+static const size_t default_extensions[] = {

+   o(ARB_copy_buffer),

+   o(ARB_draw_buffers),

+   o(ARB_multisample),

+   o(ARB_texture_compression),

+   o(ARB_transpose_matrix),

+   o(ARB_vertex_buffer_object),

+   o(ARB_window_pos),

+

+   o(EXT_abgr),

+   o(EXT_bgra),

+   o(EXT_compiled_vertex_array),

+   o(EXT_copy_texture),

+   o(EXT_draw_range_elements),

+   o(EXT_multi_draw_arrays),

+   o(EXT_packed_pixels),

+   o(EXT_polygon_offset),

+   o(EXT_rescale_normal),

+   o(EXT_separate_specular_color),

+   o(EXT_subtexture),

+   o(EXT_texture),

+   o(EXT_texture3D),

+   o(EXT_texture_object),

+   o(EXT_vertex_array),

+

+   o(OES_read_format),

+   o(OES_standard_derivatives),

+

+   /* Vendor Extensions */

+   o(APPLE_packed_pixels),

+   o(IBM_multimode_draw_arrays),

+   o(IBM_rasterpos_clip),

+   o(NV_light_max_exponent),

+   o(NV_texgen_reflection),

+   o(SGIS_generate_mipmap),

+   o(SGIS_texture_edge_clamp),

+   o(SGIS_texture_lod),

+

+   0,

+};

+

+

+/**

+ * Enable all extensions suitable for a software-only renderer.

+ * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.

+ */

+void

+_mesa_enable_sw_extensions(struct gl_context *ctx)

+{

+   /*ctx->Extensions.ARB_copy_buffer = GL_TRUE;*/

+   ctx->Extensions.ARB_depth_clamp = GL_TRUE;

+   ctx->Extensions.ARB_depth_texture = GL_TRUE;

+   /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/

+   ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;

+   ctx->Extensions.ARB_draw_instanced = GL_TRUE;

+   ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;

+   ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;

+#if FEATURE_ARB_fragment_program

+   ctx->Extensions.ARB_fragment_program = GL_TRUE;

+   ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;

+#endif

+#if FEATURE_ARB_fragment_shader

+   ctx->Extensions.ARB_fragment_shader = GL_TRUE;

+#endif

+#if FEATURE_ARB_framebuffer_object

+   ctx->Extensions.ARB_framebuffer_object = GL_TRUE;

+#endif

+#if FEATURE_ARB_geometry_shader4 && 0

+   /* XXX re-enable when GLSL compiler again supports geometry shaders */

+   ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;

+#endif

+   ctx->Extensions.ARB_half_float_pixel = GL_TRUE;

+   ctx->Extensions.ARB_half_float_vertex = GL_TRUE;

+   ctx->Extensions.ARB_map_buffer_range = GL_TRUE;

+   ctx->Extensions.ARB_multitexture = GL_TRUE;

+#if FEATURE_queryobj

+   ctx->Extensions.ARB_occlusion_query = GL_TRUE;

+   ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;

+#endif

+   ctx->Extensions.ARB_point_sprite = GL_TRUE;

+#if FEATURE_ARB_shader_objects

+   ctx->Extensions.ARB_shader_objects = GL_TRUE;

+   ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;

+#endif

+#if FEATURE_ARB_shading_language_100

+   ctx->Extensions.ARB_shading_language_100 = GL_TRUE;

+#endif

+   ctx->Extensions.ARB_shadow = GL_TRUE;

+   ctx->Extensions.ARB_shadow_ambient = GL_TRUE;

+   ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;

+   ctx->Extensions.ARB_texture_cube_map = GL_TRUE;

+   ctx->Extensions.ARB_texture_env_combine = GL_TRUE;

+   ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;

+   ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;

+   /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/

+   ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;

+   ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;

+   ctx->Extensions.ARB_texture_rg = GL_TRUE;

+   ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;

+   ctx->Extensions.ARB_vertex_array_object = GL_TRUE;

+#if FEATURE_ARB_vertex_program

+   ctx->Extensions.ARB_vertex_program = GL_TRUE;

+#endif

+#if FEATURE_ARB_vertex_shader

+   ctx->Extensions.ARB_vertex_shader = GL_TRUE;

+#endif

+#if FEATURE_ARB_vertex_buffer_object

+   /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/

+#endif

+#if FEATURE_ARB_sync

+   ctx->Extensions.ARB_sync = GL_TRUE;

+#endif

+   ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;

+#if FEATURE_APPLE_object_purgeable

+   ctx->Extensions.APPLE_object_purgeable = GL_TRUE;

+#endif

+   ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;

+#if FEATURE_ATI_fragment_shader

+   ctx->Extensions.ATI_fragment_shader = GL_TRUE;

+#endif

+   ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;

+   ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;

+   ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;

+   ctx->Extensions.ATI_separate_stencil = GL_TRUE;

+   ctx->Extensions.EXT_blend_color = GL_TRUE;

+   ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;

+   ctx->Extensions.EXT_blend_func_separate = GL_TRUE;

+   ctx->Extensions.EXT_blend_logic_op = GL_TRUE;

+   ctx->Extensions.EXT_blend_minmax = GL_TRUE;

+   ctx->Extensions.EXT_blend_subtract = GL_TRUE;

+   ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;

+   ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;

+   ctx->Extensions.EXT_fog_coord = GL_TRUE;

+#if FEATURE_EXT_framebuffer_object

+   ctx->Extensions.EXT_framebuffer_object = GL_TRUE;

+#endif

+#if FEATURE_EXT_framebuffer_blit

+   ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;

+#endif

+#if FEATURE_ARB_framebuffer_object

+   ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;

+#endif

+   /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/

+   ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;

+   ctx->Extensions.EXT_paletted_texture = GL_TRUE;

+#if FEATURE_EXT_pixel_buffer_object

+   ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;

+#endif

+   ctx->Extensions.EXT_point_parameters = GL_TRUE;

+   ctx->Extensions.EXT_provoking_vertex = GL_TRUE;

+   ctx->Extensions.EXT_shadow_funcs = GL_TRUE;

+   ctx->Extensions.EXT_secondary_color = GL_TRUE;

+   ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;

+   ctx->Extensions.EXT_stencil_wrap = GL_TRUE;

+   ctx->Extensions.EXT_stencil_two_side = GL_TRUE;

+   ctx->Extensions.EXT_texture_array = GL_TRUE;

+   ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;

+   ctx->Extensions.EXT_texture_env_add = GL_TRUE;

+   ctx->Extensions.EXT_texture_env_combine = GL_TRUE;

+   ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;

+   ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;

+   ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;

+   ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;

+   ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE;

+#if FEATURE_EXT_texture_sRGB

+   ctx->Extensions.EXT_texture_sRGB = GL_TRUE;

+   ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;

+#endif

+   ctx->Extensions.EXT_texture_swizzle = GL_TRUE;

+#if FEATURE_EXT_transform_feedback

+   /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/

+#endif

+   ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;

+   /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/

+   ctx->Extensions.MESA_pack_invert = GL_TRUE;

+   ctx->Extensions.MESA_resize_buffers = GL_TRUE;

+   ctx->Extensions.MESA_texture_array = GL_TRUE;

+   ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;

+   ctx->Extensions.NV_blend_square = GL_TRUE;

+   ctx->Extensions.NV_conditional_render = GL_TRUE;

+   /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/

+   ctx->Extensions.NV_point_sprite = GL_TRUE;

+   ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;

+   ctx->Extensions.NV_texture_rectangle = GL_TRUE;

+   /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/

+#if FEATURE_NV_vertex_program

+   ctx->Extensions.NV_vertex_program = GL_TRUE;

+   ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;

+#endif

+#if FEATURE_NV_fragment_program

+   ctx->Extensions.NV_fragment_program = GL_TRUE;

+#endif

+#if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program

+   ctx->Extensions.NV_fragment_program_option = GL_TRUE;

+#endif

+   /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/

+   ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;

+#if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program

+   ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;

+#endif

+#if FEATURE_texture_fxt1

+   _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");

+#endif

+#if FEATURE_texture_s3tc

+   if (ctx->Mesa_DXTn) {

+      _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");

+      _mesa_enable_extension(ctx, "GL_S3_s3tc");

+   }

+#endif

+}

+

+

+/**

+ * Enable common EXT extensions in the ARB_imaging subset.

+ */

+void

+_mesa_enable_imaging_extensions(struct gl_context *ctx)

+{

+   ctx->Extensions.EXT_blend_color = GL_TRUE;

+   ctx->Extensions.EXT_blend_logic_op = GL_TRUE;

+   ctx->Extensions.EXT_blend_minmax = GL_TRUE;

+   ctx->Extensions.EXT_blend_subtract = GL_TRUE;

+}

+

+

+

+/**

+ * Enable all OpenGL 1.3 features and extensions.

+ * A convenience function to be called by drivers.

+ */

+void

+_mesa_enable_1_3_extensions(struct gl_context *ctx)

+{

+   /*ctx->Extensions.ARB_multisample = GL_TRUE;*/

+   ctx->Extensions.ARB_multitexture = GL_TRUE;

+   ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;

+   /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/

+   ctx->Extensions.ARB_texture_cube_map = GL_TRUE;

+   ctx->Extensions.ARB_texture_env_combine = GL_TRUE;

+   ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;

+   ctx->Extensions.EXT_texture_env_add = GL_TRUE;

+   /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/

+}

+

+

+

+/**

+ * Enable all OpenGL 1.4 features and extensions.

+ * A convenience function to be called by drivers.

+ */

+void

+_mesa_enable_1_4_extensions(struct gl_context *ctx)

+{

+   ctx->Extensions.ARB_depth_texture = GL_TRUE;

+   ctx->Extensions.ARB_shadow = GL_TRUE;

+   ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;

+   ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;

+   ctx->Extensions.ARB_window_pos = GL_TRUE;

+   ctx->Extensions.EXT_blend_color = GL_TRUE;

+   ctx->Extensions.EXT_blend_func_separate = GL_TRUE;

+   ctx->Extensions.EXT_blend_minmax = GL_TRUE;

+   ctx->Extensions.EXT_blend_subtract = GL_TRUE;

+   ctx->Extensions.EXT_fog_coord = GL_TRUE;

+   /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/

+   ctx->Extensions.EXT_point_parameters = GL_TRUE;

+   ctx->Extensions.EXT_secondary_color = GL_TRUE;

+   ctx->Extensions.EXT_stencil_wrap = GL_TRUE;

+   ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;

+   /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/

+}

+

+

+/**

+ * Enable all OpenGL 1.5 features and extensions.

+ * A convenience function to be called by drivers.

+ */

+void

+_mesa_enable_1_5_extensions(struct gl_context *ctx)

+{

+   ctx->Extensions.ARB_occlusion_query = GL_TRUE;

+   /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/

+   ctx->Extensions.EXT_shadow_funcs = GL_TRUE;

+}

+

+

+/**

+ * Enable all OpenGL 2.0 features and extensions.

+ * A convenience function to be called by drivers.

+ */

+void

+_mesa_enable_2_0_extensions(struct gl_context *ctx)

+{

+   /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/

+#if FEATURE_ARB_fragment_shader

+   ctx->Extensions.ARB_fragment_shader = GL_TRUE;

+#endif

+   ctx->Extensions.ARB_point_sprite = GL_TRUE;

+   ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;

+   ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;

+#if FEATURE_ARB_shader_objects

+   ctx->Extensions.ARB_shader_objects = GL_TRUE;

+#endif

+#if FEATURE_ARB_shading_language_100

+   ctx->Extensions.ARB_shading_language_100 = GL_TRUE;

+#endif

+   ctx->Extensions.EXT_stencil_two_side = GL_TRUE;

+#if FEATURE_ARB_vertex_shader

+   ctx->Extensions.ARB_vertex_shader = GL_TRUE;

+#endif

+}

+

+

+/**

+ * Enable all OpenGL 2.1 features and extensions.

+ * A convenience function to be called by drivers.

+ */

+void

+_mesa_enable_2_1_extensions(struct gl_context *ctx)

+{

+#if FEATURE_EXT_pixel_buffer_object

+   ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;

+#endif

+#if FEATURE_EXT_texture_sRGB

+   ctx->Extensions.EXT_texture_sRGB = GL_TRUE;

+#endif

+}

+

+

+/**

+ * Either enable or disable the named extension.

+ * \return GL_TRUE for success, GL_FALSE if invalid extension name

+ */

+static GLboolean

+set_extension( struct gl_context *ctx, const char *name, GLboolean state )

+{

+   size_t offset;

+

+   if (ctx->Extensions.String) {

+      /* The string was already queried - can't change it now! */

+      _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);

+      return GL_FALSE;

+   }

+

+   offset = name_to_offset(name);

+   if (offset == 0) {

+      _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",

+	            name);

+      return GL_FALSE;

+   } else if (offset == o(dummy_true) && state == GL_FALSE) {

+      _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "

+	                  "%s", name);

+      return GL_FALSE;

+   } else {

+      GLboolean *base = (GLboolean *) &ctx->Extensions;

+      base[offset] = state;

+      return GL_TRUE;

+   }

+}

+

+

+/**

+ * Enable the named extension.

+ * Typically called by drivers.

+ */

+void

+_mesa_enable_extension( struct gl_context *ctx, const char *name )

+{

+   if (!set_extension(ctx, name, GL_TRUE))

+      _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);

+}

+

+

+/**

+ * Disable the named extension.

+ * XXX is this really needed???

+ */

+void

+_mesa_disable_extension( struct gl_context *ctx, const char *name )

+{

+   if (!set_extension(ctx, name, GL_FALSE))

+      _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);

+}

+

+

+/**

+ * Test if the named extension is enabled in this context.

+ */

+GLboolean

+_mesa_extension_is_enabled( struct gl_context *ctx, const char *name )

+{

+   size_t offset;

+   GLboolean *base;

+

+   if (name == 0)

+      return GL_FALSE;

+

+   offset = name_to_offset(name);

+   if (offset == 0)

+      return GL_FALSE;

+   base = (GLboolean *) &ctx->Extensions;

+   return base[offset];

+}

+

+

+/**

+ * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.

+ *

+ * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to

+ * enable or disable. The list is processed thus:

+ *    - Enable recognized extension names that are prefixed with '+'.

+ *    - Disable recognized extension names that are prefixed with '-'.

+ *    - Enable recognized extension names that are not prefixed.

+ *    - Collect unrecognized extension names in a new string.

+ *

+ * \return Space-separated list of unrecognized extension names (which must

+ *    be freed). Does not return \c NULL.

+ */

+static char *

+get_extension_override( struct gl_context *ctx )

+{

+   const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE");

+   char *env;

+   char *ext;

+   char *extra_exts;

+   int len;

+

+   if (env_const == NULL) {

+      /* Return the empty string rather than NULL. This simplifies the logic

+       * of client functions. */

+      return calloc(1, sizeof(char));

+   }

+

+   /* extra_exts: List of unrecognized extensions. */

+   extra_exts = calloc(strlen(env_const), sizeof(char));

+

+   /* Copy env_const because strtok() is destructive. */

+   env = strdup(env_const);

+   for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {

+      int enable;

+      int recognized;

+      switch (ext[0]) {

+      case '+':

+         enable = 1;

+         ++ext;

+         break;

+      case '-':

+         enable = 0;

+         ++ext;

+         break;

+      default:

+         enable = 1;

+         break;

+      }

+      recognized = set_extension(ctx, ext, enable);

+      if (!recognized) {

+         strcat(extra_exts, ext);

+         strcat(extra_exts, " ");

+      }

+   }

+

+   /* Remove trailing space. */

+   len = strlen(extra_exts);

+   if (extra_exts[len - 1] == ' ')

+      extra_exts[len - 1] = '\0';

+

+   return extra_exts;

+}

+

+

+/**

+ * \brief Initialize extension tables and enable default extensions.

+ *

+ * This should be called during context initialization.

+ * Note: Sets gl_extensions.dummy_true to true.

+ */

+void

+_mesa_init_extensions( struct gl_context *ctx )

+{

+   GLboolean *base = (GLboolean *) &ctx->Extensions;

+   GLboolean *sentinel = base + o(extension_sentinel);

+   GLboolean *i;

+   const size_t *j;

+

+   /* First, turn all extensions off. */

+   for (i = base; i != sentinel; ++i)

+      *i = GL_FALSE;

+

+   /* Then, selectively turn default extensions on. */

+   ctx->Extensions.dummy_true = GL_TRUE;

+   for (j = default_extensions; *j != 0; ++j)

+      base[*j] = GL_TRUE;

+}

+

+

+typedef unsigned short extension_index;

+

+

+/**

+ * Compare two entries of the extensions table.  Sorts first by year,

+ * then by name.

+ *

+ * Arguments are indices into extension_table.

+ */

+static int

+extension_compare(const void *p1, const void *p2)

+{

+   extension_index i1 = * (const extension_index *) p1;

+   extension_index i2 = * (const extension_index *) p2;

+   const struct extension *e1 = &extension_table[i1];

+   const struct extension *e2 = &extension_table[i2];

+   int res;

+

+   res = (int)e1->year - (int)e2->year;

+

+   if (res == 0) {

+      res = strcmp(e1->name, e2->name);

+   }

+

+   return res;

+}

+

+

+/**

+ * Construct the GL_EXTENSIONS string.  Called the first time that

+ * glGetString(GL_EXTENSIONS) is called.

+ */

+GLubyte*

+_mesa_make_extension_string(struct gl_context *ctx)

+{

+   /* The extension string. */

+   char *exts = 0;

+   /* Length of extension string. */

+   size_t length = 0;

+   /* Number of extensions */

+   unsigned count;

+   /* Indices of the extensions sorted by year */

+   extension_index *extension_indices;

+   /* String of extra extensions. */

+   char *extra_extensions = get_extension_override(ctx);

+   GLboolean *base = (GLboolean *) &ctx->Extensions;

+   const struct extension *i;

+   unsigned j;

+   unsigned maxYear = ~0;

+

+   /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */

+   {

+      const char *env = getenv("MESA_EXTENSION_MAX_YEAR");

+      if (env) {

+         maxYear = atoi(env);

+         _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n",

+                     maxYear);

+      }

+   }

+

+   /* Compute length of the extension string. */

+   count = 0;

+   for (i = extension_table; i->name != 0; ++i) {

+      if (base[i->offset] &&

+          i->year <= maxYear &&

+          (i->api_set & (1 << ctx->API))) {

+	 length += strlen(i->name) + 1; /* +1 for space */

+	 ++count;

+      }

+   }

+   if (extra_extensions != NULL)

+      length += 1 + strlen(extra_extensions); /* +1 for space */

+

+   exts = (char *) calloc(length + 1, sizeof(char));

+   if (exts == NULL) {

+      free(extra_extensions);

+      return NULL;

+   }

+

+   extension_indices = malloc(count * sizeof(extension_index));

+   if (extension_indices == NULL) {

+      free(exts);

+      free(extra_extensions);

+      return NULL;

+   }

+

+   /* Sort extensions in chronological order because certain old applications (e.g.,

+    * Quake3 demo) store the extension list in a static size buffer so chronologically

+    * order ensure that the extensions that such applications expect will fit into

+    * that buffer.

+    */

+   j = 0;

+   for (i = extension_table; i->name != 0; ++i) {

+      if (base[i->offset] &&

+          i->year <= maxYear &&

+          (i->api_set & (1 << ctx->API))) {

+         extension_indices[j++] = i - extension_table;

+      }

+   }

+   assert(j == count);

+   qsort(extension_indices, count, sizeof *extension_indices, extension_compare);

+

+   /* Build the extension string.*/

+   for (j = 0; j < count; ++j) {

+      i = &extension_table[extension_indices[j]];

+      assert(base[i->offset] && (i->api_set & (1 << ctx->API)));

+      strcat(exts, i->name);

+      strcat(exts, " ");

+   }

+   free(extension_indices);

+   if (extra_extensions != 0) {

+      strcat(exts, extra_extensions);

+      free(extra_extensions);

+   }

+

+   return (GLubyte *) exts;

+}

+

+/**

+ * Return number of enabled extensions.

+ */

+GLuint

+_mesa_get_extension_count(struct gl_context *ctx)

+{

+   GLboolean *base;

+   const struct extension *i;

+

+   /* only count once */

+   if (ctx->Extensions.Count != 0)

+      return ctx->Extensions.Count;

+

+   base = (GLboolean *) &ctx->Extensions;

+   for (i = extension_table; i->name != 0; ++i) {

+      if (base[i->offset]) {

+	 ctx->Extensions.Count++;

+      }

+   }

+   return ctx->Extensions.Count;

+}

+

+/**

+ * Return name of i-th enabled extension

+ */

+const GLubyte *

+_mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)

+{

+   const GLboolean *base;

+   size_t n;

+   const struct extension *i;

+

+   if (index < 0)

+      return NULL;

+

+   base = (GLboolean*) &ctx->Extensions;

+   n = 0;

+   for (i = extension_table; i->name != 0; ++i) {

+      if (n == index && base[i->offset]) {

+	 return (GLubyte*) i->name;

+      } else if (base[i->offset]) {

+	 ++n;

+      }

+   }

+

+   return NULL;

+}