svn merge ^/branches/released .

1 files changed, 987 insertions, 989 deletions

diff --git a/mesalib/src/mesa/main/extensions.c b/mesalib/src/mesa/main/extensions.c
index 080fa98df..81978b3c1 100644
--- a/mesalib/src/mesa/main/extensions.c
+++ b/mesalib/src/mesa/main/extensions.c
@@ -1,989 +1,987 @@
-/*
- * 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.
- */
-
-
-#include "glheader.h"
-#include "imports.h"
-#include "context.h"
-#include "extensions.h"
-#include "mtypes.h"
-
-
-#define F(x) offsetof(struct gl_extensions, x)
-#define ON GL_TRUE
-#define OFF GL_FALSE
-
-
-/*
- * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
- */
-static const struct {
-   GLboolean enabled;
-   const char *name;
-   int flag_offset;
-} default_extensions[] = {
-   { OFF, "GL_ARB_blend_func_extended",        F(ARB_blend_func_extended) },
-   { OFF, "GL_ARB_copy_buffer",                F(ARB_copy_buffer) },
-   { OFF, "GL_ARB_depth_buffer_float",         F(ARB_depth_buffer_float) },
-   { OFF, "GL_ARB_depth_clamp",                F(ARB_depth_clamp) },
-   { OFF, "GL_ARB_depth_texture",              F(ARB_depth_texture) },
-   { ON,  "GL_ARB_draw_buffers",               F(ARB_draw_buffers) },
-   { OFF, "GL_ARB_draw_elements_base_vertex",  F(ARB_draw_elements_base_vertex) },
-   { OFF, "GL_ARB_draw_instanced",             F(ARB_draw_instanced) },
-   { OFF, "GL_ARB_fragment_coord_conventions", F(ARB_fragment_coord_conventions) },
-   { OFF, "GL_ARB_fragment_program",           F(ARB_fragment_program) },
-   { OFF, "GL_ARB_fragment_program_shadow",    F(ARB_fragment_program_shadow) },
-   { OFF, "GL_ARB_fragment_shader",            F(ARB_fragment_shader) },
-   { OFF, "GL_ARB_framebuffer_object",         F(ARB_framebuffer_object) },
-   { OFF, "GL_ARB_explicit_attrib_location",   F(ARB_explicit_attrib_location) },
-   /* TODO: reenable this when the new GLSL compiler actually supports them */
-   /* { OFF, "GL_ARB_geometry_shader4",           F(ARB_geometry_shader4) }, */
-   { OFF, "GL_ARB_half_float_pixel",           F(ARB_half_float_pixel) },
-   { OFF, "GL_ARB_half_float_vertex",          F(ARB_half_float_vertex) },
-   { OFF, "GL_ARB_imaging",                    F(ARB_imaging) },
-   { OFF, "GL_ARB_instanced_arrays",           F(ARB_instanced_arrays) },
-   { OFF, "GL_ARB_map_buffer_range",           F(ARB_map_buffer_range) },
-   { ON,  "GL_ARB_multisample",                F(ARB_multisample) },
-   { OFF, "GL_ARB_multitexture",               F(ARB_multitexture) },
-   { OFF, "GL_ARB_occlusion_query",            F(ARB_occlusion_query) },
-   { OFF, "GL_ARB_occlusion_query2",           F(ARB_occlusion_query2) },
-   { OFF, "GL_ARB_pixel_buffer_object",        F(EXT_pixel_buffer_object) },
-   { OFF, "GL_ARB_point_parameters",           F(EXT_point_parameters) },
-   { OFF, "GL_ARB_point_sprite",               F(ARB_point_sprite) },
-   { OFF, "GL_ARB_provoking_vertex",           F(EXT_provoking_vertex) },
-   { OFF, "GL_ARB_sampler_objects",            F(ARB_sampler_objects) },
-   { OFF, "GL_ARB_seamless_cube_map",          F(ARB_seamless_cube_map) },
-   { OFF, "GL_ARB_shader_objects",             F(ARB_shader_objects) },
-   { OFF, "GL_ARB_shading_language_100",       F(ARB_shading_language_100) },
-   { OFF, "GL_ARB_shadow",                     F(ARB_shadow) },
-   { OFF, "GL_ARB_shadow_ambient",             F(ARB_shadow_ambient) },
-   { OFF, "GL_ARB_sync",                       F(ARB_sync) },
-   { OFF, "GL_ARB_texture_border_clamp",       F(ARB_texture_border_clamp) },
-   { OFF, "GL_ARB_texture_buffer_object",      F(ARB_texture_buffer_object) },
-   { ON,  "GL_ARB_texture_compression",        F(ARB_texture_compression) },
-   { OFF, "GL_ARB_texture_cube_map",           F(ARB_texture_cube_map) },
-   { OFF, "GL_ARB_texture_env_add",            F(EXT_texture_env_add) },
-   { OFF, "GL_ARB_texture_env_combine",        F(ARB_texture_env_combine) },
-   { OFF, "GL_ARB_texture_env_crossbar",       F(ARB_texture_env_crossbar) },
-   { OFF, "GL_ARB_texture_env_dot3",           F(ARB_texture_env_dot3) },
-   { OFF, "GL_MESAX_texture_float",            F(ARB_texture_float) },
-   { OFF, "GL_ARB_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
-   { OFF, "GL_ARB_texture_multisample",        F(ARB_texture_multisample) },
-   { OFF, "GL_ARB_texture_non_power_of_two",   F(ARB_texture_non_power_of_two)},
-   { OFF, "GL_ARB_texture_rectangle",          F(NV_texture_rectangle) },
-   { OFF, "GL_ARB_texture_rg",                 F(ARB_texture_rg) },
-   { OFF, "GL_ARB_texture_rgb10_a2ui",         F(ARB_texture_rgb10_a2ui) },
-   { OFF, "GL_ARB_texture_swizzle",            F(EXT_texture_swizzle) },
-   { ON,  "GL_ARB_transpose_matrix",           F(ARB_transpose_matrix) },
-   { OFF, "GL_ARB_transform_feedback2",        F(ARB_transform_feedback2) },
-   { OFF, "GL_ARB_uniform_buffer_object",      F(ARB_uniform_buffer_object) },
-   { OFF, "GL_ARB_vertex_array_bgra",          F(EXT_vertex_array_bgra) },
-   { OFF, "GL_ARB_vertex_array_object",        F(ARB_vertex_array_object) },
-   { ON,  "GL_ARB_vertex_buffer_object",       F(ARB_vertex_buffer_object) },
-   { OFF, "GL_ARB_vertex_program",             F(ARB_vertex_program) },
-   { OFF, "GL_ARB_vertex_shader",              F(ARB_vertex_shader) },
-   { OFF, "GL_ARB_vertex_type_2_10_10_10_rev", F(ARB_vertex_type_2_10_10_10_rev) },
-   { ON,  "GL_ARB_window_pos",                 F(ARB_window_pos) },
-   { ON,  "GL_EXT_abgr",                       F(EXT_abgr) },
-   { ON,  "GL_EXT_bgra",                       F(EXT_bgra) },
-   { OFF, "GL_EXT_blend_color",                F(EXT_blend_color) },
-   { OFF, "GL_EXT_blend_equation_separate",    F(EXT_blend_equation_separate) },
-   { OFF, "GL_EXT_blend_func_separate",        F(EXT_blend_func_separate) },
-   { OFF, "GL_EXT_blend_logic_op",             F(EXT_blend_logic_op) },
-   { OFF, "GL_EXT_blend_minmax",               F(EXT_blend_minmax) },
-   { OFF, "GL_EXT_blend_subtract",             F(EXT_blend_subtract) },
-   { OFF, "GL_EXT_clip_volume_hint",           F(EXT_clip_volume_hint) },
-   { OFF, "GL_EXT_cull_vertex",                F(EXT_cull_vertex) },
-   { ON,  "GL_EXT_compiled_vertex_array",      F(EXT_compiled_vertex_array) },
-   { OFF, "GL_EXT_convolution",                F(EXT_convolution) },
-   { ON,  "GL_EXT_copy_texture",               F(EXT_copy_texture) },
-   { OFF, "GL_EXT_depth_bounds_test",          F(EXT_depth_bounds_test) },
-   { OFF, "GL_EXT_draw_buffers2",              F(EXT_draw_buffers2) },
-   { OFF, "GL_EXT_draw_instanced",             F(ARB_draw_instanced) },
-   { ON,  "GL_EXT_draw_range_elements",        F(EXT_draw_range_elements) },
-   { OFF, "GL_EXT_framebuffer_blit",           F(EXT_framebuffer_blit) },
-   { OFF, "GL_EXT_framebuffer_multisample",    F(EXT_framebuffer_multisample) },
-   { OFF, "GL_EXT_framebuffer_object",         F(EXT_framebuffer_object) },
-   { OFF, "GL_EXT_framebuffer_sRGB",           F(EXT_framebuffer_sRGB) },
-   { OFF, "GL_EXT_fog_coord",                  F(EXT_fog_coord) },
-   { OFF, "GL_EXT_gpu_program_parameters",     F(EXT_gpu_program_parameters) },
-   { OFF, "GL_EXT_histogram",                  F(EXT_histogram) },
-   { ON,  "GL_EXT_multi_draw_arrays",          F(EXT_multi_draw_arrays) },
-   { OFF, "GL_EXT_packed_depth_stencil",       F(EXT_packed_depth_stencil) },
-   { OFF, "GL_EXT_packed_float",               F(EXT_packed_float) },
-   { ON,  "GL_EXT_packed_pixels",              F(EXT_packed_pixels) },
-   { OFF, "GL_EXT_paletted_texture",           F(EXT_paletted_texture) },
-   { OFF, "GL_EXT_pixel_buffer_object",        F(EXT_pixel_buffer_object) },
-   { OFF, "GL_EXT_point_parameters",           F(EXT_point_parameters) },
-   { ON,  "GL_EXT_polygon_offset",             F(EXT_polygon_offset) },
-   { OFF, "GL_EXT_provoking_vertex",           F(EXT_provoking_vertex) },
-   { ON,  "GL_EXT_rescale_normal",             F(EXT_rescale_normal) },
-   { OFF, "GL_EXT_secondary_color",            F(EXT_secondary_color) },
-   { ON,  "GL_EXT_separate_specular_color",    F(EXT_separate_specular_color) },
-   { OFF, "GL_EXT_shadow_funcs",               F(EXT_shadow_funcs) },
-   { OFF, "GL_EXT_shared_texture_palette",     F(EXT_shared_texture_palette) },
-   { OFF, "GL_EXT_stencil_two_side",           F(EXT_stencil_two_side) },
-   { OFF, "GL_EXT_stencil_wrap",               F(EXT_stencil_wrap) },
-   { ON,  "GL_EXT_subtexture",                 F(EXT_subtexture) },
-   { ON,  "GL_EXT_texture",                    F(EXT_texture) },
-   { ON,  "GL_EXT_texture3D",                  F(EXT_texture3D) },
-   { OFF, "GL_EXT_texture_array",              F(EXT_texture_array) },
-   { OFF, "GL_EXT_texture_compression_s3tc",   F(EXT_texture_compression_s3tc) },
-   { OFF, "GL_EXT_texture_compression_rgtc",   F(EXT_texture_compression_rgtc) },
-   { OFF, "GL_EXT_texture_cube_map",           F(ARB_texture_cube_map) },
-   { ON,  "GL_EXT_texture_edge_clamp",         F(SGIS_texture_edge_clamp) },
-   { OFF, "GL_EXT_texture_env_add",            F(EXT_texture_env_add) },
-   { OFF, "GL_EXT_texture_env_combine",        F(EXT_texture_env_combine) },
-   { OFF, "GL_EXT_texture_env_dot3",           F(EXT_texture_env_dot3) },
-   { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },
-   { OFF, "GL_EXT_texture_integer",            F(EXT_texture_integer) },
-   { OFF, "GL_EXT_texture_lod_bias",           F(EXT_texture_lod_bias) },
-   { OFF, "GL_EXT_texture_mirror_clamp",       F(EXT_texture_mirror_clamp) },
-   { ON,  "GL_EXT_texture_object",             F(EXT_texture_object) },
-   { OFF, "GL_EXT_texture_rectangle",          F(NV_texture_rectangle) },
-   { OFF, "GL_EXT_texture_shared_exponent",    F(EXT_texture_shared_exponent) },
-   { OFF, "GL_EXT_texture_sRGB",               F(EXT_texture_sRGB) },
-   { OFF, "GL_EXT_texture_swizzle",            F(EXT_texture_swizzle) },
-   { OFF, "GL_EXT_timer_query",                F(EXT_timer_query) },
-   { OFF, "GL_EXT_transform_feedback",         F(EXT_transform_feedback) },
-   { ON,  "GL_EXT_vertex_array",               F(EXT_vertex_array) },
-   { OFF, "GL_EXT_vertex_array_bgra",          F(EXT_vertex_array_bgra) },
-   { OFF, "GL_EXT_vertex_array_set",           F(EXT_vertex_array_set) },
-   { OFF, "GL_3DFX_texture_compression_FXT1",  F(TDFX_texture_compression_FXT1) },
-   { OFF, "GL_APPLE_client_storage",           F(APPLE_client_storage) },
-   { ON,  "GL_APPLE_packed_pixels",            F(APPLE_packed_pixels) },
-   { OFF, "GL_APPLE_vertex_array_object",      F(APPLE_vertex_array_object) },
-   { OFF, "GL_APPLE_object_purgeable",         F(APPLE_object_purgeable) },
-   { OFF, "GL_ATI_blend_equation_separate",    F(EXT_blend_equation_separate) },
-   { OFF, "GL_ATI_envmap_bumpmap",             F(ATI_envmap_bumpmap) },
-   { OFF, "GL_ATI_texture_env_combine3",       F(ATI_texture_env_combine3)},
-   { OFF, "GL_ATI_texture_mirror_once",        F(ATI_texture_mirror_once)},
-   { OFF, "GL_ATI_fragment_shader",            F(ATI_fragment_shader)},
-   { OFF, "GL_ATI_separate_stencil",           F(ATI_separate_stencil)},
-   { ON,  "GL_IBM_multimode_draw_arrays",      F(IBM_multimode_draw_arrays) },
-   { ON,  "GL_IBM_rasterpos_clip",             F(IBM_rasterpos_clip) },
-   { OFF, "GL_IBM_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
-   { OFF, "GL_INGR_blend_func_separate",       F(EXT_blend_func_separate) },
-   { OFF, "GL_MESA_pack_invert",               F(MESA_pack_invert) },
-   { OFF, "GL_MESA_packed_depth_stencil",      F(MESA_packed_depth_stencil) },
-   { OFF, "GL_MESA_resize_buffers",            F(MESA_resize_buffers) },
-   { OFF, "GL_MESA_texture_array",             F(MESA_texture_array) },
-   { OFF, "GL_MESA_texture_signed_rgba",       F(MESA_texture_signed_rgba) },
-   { OFF, "GL_MESA_ycbcr_texture",             F(MESA_ycbcr_texture) },
-   { ON,  "GL_MESA_window_pos",                F(ARB_window_pos) },
-   { OFF, "GL_NV_blend_square",                F(NV_blend_square) },
-   { OFF, "GL_NV_conditional_render",          F(NV_conditional_render) },
-   { OFF, "GL_NV_depth_clamp",                 F(ARB_depth_clamp) },
-   { OFF, "GL_NV_fragment_program",            F(NV_fragment_program) },
-   { OFF, "GL_NV_fragment_program_option",     F(NV_fragment_program_option) },
-   { ON,  "GL_NV_light_max_exponent",          F(NV_light_max_exponent) },
-   { OFF, "GL_NV_packed_depth_stencil",        F(EXT_packed_depth_stencil) },
-   { OFF, "GL_NV_point_sprite",                F(NV_point_sprite) },
-   { OFF, "GL_NV_primitive_restart",           F(NV_primitive_restart) },
-   { ON,  "GL_NV_texgen_reflection",           F(NV_texgen_reflection) },
-   { OFF, "GL_NV_texture_env_combine4",        F(NV_texture_env_combine4) },
-   { OFF, "GL_NV_texture_rectangle",           F(NV_texture_rectangle) },
-   { OFF, "GL_NV_vertex_program",              F(NV_vertex_program) },
-   { OFF, "GL_NV_vertex_program1_1",           F(NV_vertex_program1_1) },
-   { ON,  "GL_OES_read_format",                F(OES_read_format) },
-   { OFF, "GL_SGI_color_matrix",               F(SGI_color_matrix) },
-   { OFF, "GL_SGI_color_table",                F(SGI_color_table) },
-   { OFF, "GL_SGI_texture_color_table",        F(SGI_texture_color_table) },
-   { OFF, "GL_SGIS_generate_mipmap",           F(SGIS_generate_mipmap) },
-   { OFF, "GL_SGIS_texture_border_clamp",      F(ARB_texture_border_clamp) },
-   { ON,  "GL_SGIS_texture_edge_clamp",        F(SGIS_texture_edge_clamp) },
-   { ON,  "GL_SGIS_texture_lod",               F(SGIS_texture_lod) },
-   { ON,  "GL_SUN_multi_draw_arrays",          F(EXT_multi_draw_arrays) },
-   { OFF, "GL_S3_s3tc",                        F(S3_s3tc) },
-#if FEATURE_OES_EGL_image
-   { OFF, "GL_OES_EGL_image",                  F(OES_EGL_image) },
-#endif
-#if FEATURE_OES_draw_texture
-   { OFF, "GL_OES_draw_texture",               F(OES_draw_texture) },
-#endif /* FEATURE_OES_draw_texture */
-};
-
-
-
-/**
- * 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(GLcontext *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_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
-   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_imaging = 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;
-#endif
-   ctx->Extensions.ARB_point_sprite = 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.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_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_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_convolution = 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_histogram = GL_TRUE;
-   /*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_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;
-#if FEATURE_EXT_texture_sRGB
-   ctx->Extensions.EXT_texture_sRGB = 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.SGI_color_matrix = GL_TRUE;
-   ctx->Extensions.SGI_color_table = GL_TRUE;
-   ctx->Extensions.SGI_texture_color_table = GL_TRUE;
-   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 GL_ARB_imaging and all the EXT extensions that are subsets of it.
- */
-void
-_mesa_enable_imaging_extensions(GLcontext *ctx)
-{
-   ctx->Extensions.ARB_imaging = GL_TRUE;
-   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;
-   ctx->Extensions.EXT_convolution = GL_TRUE;
-   ctx->Extensions.EXT_histogram = GL_TRUE;
-   ctx->Extensions.SGI_color_matrix = GL_TRUE;
-   ctx->Extensions.SGI_color_table = GL_TRUE;
-}
-
-
-
-/**
- * Enable all OpenGL 1.3 features and extensions.
- * A convenience function to be called by drivers.
- */
-void
-_mesa_enable_1_3_extensions(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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( GLcontext *ctx, const char *name, GLboolean state )
-{
-   GLboolean *base = (GLboolean *) &ctx->Extensions;
-   GLuint i;
-
-   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;
-   }
-
-   for (i = 0 ; i < Elements(default_extensions) ; i++) {
-      if (strcmp(default_extensions[i].name, name) == 0) {
-         if (default_extensions[i].flag_offset) {
-            GLboolean *enabled = base + default_extensions[i].flag_offset;
-            *enabled = state;
-         }
-         return GL_TRUE;
-      }
-   }
-   return GL_FALSE;
-}
-
-
-/**
- * Enable the named extension.
- * Typically called by drivers.
- */
-void
-_mesa_enable_extension( GLcontext *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( GLcontext *ctx, const char *name )
-{
-   if (!set_extension(ctx, name, GL_FALSE))
-      _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
-}
-
-
-/**
- * Check if the i-th extension is enabled.
- */
-static GLboolean
-extension_enabled(GLcontext *ctx, GLuint index)
-{
-   const GLboolean *base = (const GLboolean *) &ctx->Extensions;
-   if (!default_extensions[index].flag_offset ||
-       *(base + default_extensions[index].flag_offset)) {
-      return GL_TRUE;
-   }
-   else {
-      return GL_FALSE;
-   }
-}
-
-
-/**
- * Test if the named extension is enabled in this context.
- */
-GLboolean
-_mesa_extension_is_enabled( GLcontext *ctx, const char *name )
-{
-   GLuint i;
-
-   for (i = 0 ; i < Elements(default_extensions) ; i++) {
-      if (strcmp(default_extensions[i].name, name) == 0) {
-         return extension_enabled(ctx, i);
-      }
-   }
-   return GL_FALSE;
-}
-
-
-/**
- * Append string 'b' onto string 'a'.  Free 'a' and return new string.
- */
-static char *
-append(const char *a, const char *b)
-{
-   const GLuint aLen = a ? strlen(a) : 0;
-   const GLuint bLen = b ? strlen(b) : 0;
-   char *s = calloc(1, aLen + bLen + 1);
-   if (s) {
-      if (a)
-         memcpy(s, a, aLen);
-      if (b)
-         memcpy(s + aLen, b, bLen);
-      s[aLen + bLen] = '\0';
-   }
-   if (a)
-      free((void *) a);
-   return s;
-}
-
-
-/**
- * Check the MESA_EXTENSION_OVERRIDE env var.
- * For extension names that are recognized, turn them on.  For extension
- * names that are recognized and prefixed with '-', turn them off.
- * Return a string of the unknown/leftover names.
- */
-static const char *
-get_extension_override( GLcontext *ctx )
-{
-   const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
-   char *extraExt = NULL;
-   char ext[1000];
-   GLuint extLen = 0;
-   GLuint i;
-   GLboolean disableExt = GL_FALSE;
-
-   if (!envExt)
-      return NULL;
-
-   for (i = 0; ; i++) {
-      if (envExt[i] == '\0' || envExt[i] == ' ') {
-         /* terminate/process 'ext' if extLen > 0 */
-         if (extLen > 0) {
-            assert(extLen < sizeof(ext));
-            /* enable extension named by 'ext' */
-            ext[extLen] = 0;
-            if (!set_extension(ctx, ext, !disableExt)) {
-               /* unknown extension name, append it to extraExt */
-               if (extraExt) {
-                  extraExt = append(extraExt, " ");
-               }
-               extraExt = append(extraExt, ext);
-            }
-            extLen = 0;
-            disableExt = GL_FALSE;
-         }
-         if (envExt[i] == '\0')
-            break;
-      }
-      else if (envExt[i] == '-') {
-         disableExt = GL_TRUE;
-      }
-      else {
-         /* accumulate this non-space character */
-         ext[extLen++] = envExt[i];
-      }
-   }
-
-   return extraExt;
-}
-
-
-/**
- * Run through the default_extensions array above and set the
- * ctx->Extensions.ARB/EXT_* flags accordingly.
- * To be called during context initialization.
- */
-void
-_mesa_init_extensions( GLcontext *ctx )
-{
-   GLboolean *base = (GLboolean *) &ctx->Extensions;
-   GLuint i;
-
-   for (i = 0 ; i < Elements(default_extensions) ; i++) {
-      if (default_extensions[i].enabled &&
-          default_extensions[i].flag_offset) {
-         *(base + default_extensions[i].flag_offset) = GL_TRUE;
-      }
-   }
-}
-
-
-/**
- * Construct the GL_EXTENSIONS string.  Called the first time that
- * glGetString(GL_EXTENSIONS) is called.
- */
-static GLubyte *
-compute_extensions( GLcontext *ctx )
-{
-   const char *extraExt = get_extension_override(ctx);
-   GLuint extStrLen = 0;
-   char *s;
-   GLuint i;
-
-   /* first, compute length of the extension string */
-   for (i = 0 ; i < Elements(default_extensions) ; i++) {
-      if (extension_enabled(ctx, i)) {
-         extStrLen += (GLuint) strlen(default_extensions[i].name) + 1;
-      }
-   }
-
-   if (extraExt)
-      extStrLen += strlen(extraExt) + 1; /* +1 for space */
-
-   /* allocate the extension string */
-   s = (char *) malloc(extStrLen);
-   if (!s)
-      return NULL;
-
-   /* second, build the extension string */
-   extStrLen = 0;
-   for (i = 0 ; i < Elements(default_extensions) ; i++) {
-      if (extension_enabled(ctx, i)) {
-         GLuint len = (GLuint) strlen(default_extensions[i].name);
-         memcpy(s + extStrLen, default_extensions[i].name, len);
-         extStrLen += len;
-         s[extStrLen] = ' ';
-         extStrLen++;
-      }
-   }
-   ASSERT(extStrLen > 0);
-
-   s[extStrLen - 1] = 0; /* -1 to overwrite trailing the ' ' */
-
-   if (extraExt) {
-      s = append(s, " ");
-      s = append(s, extraExt);
-   }
-
-   return (GLubyte *) s;
-}
-
-static size_t
-append_extension(GLubyte **str, const char *ext)
-{
-   GLubyte *s = *str;
-   size_t len = strlen(ext);
-
-   if (s) {
-      memcpy(s, ext, len);
-      s[len++] = ' ';
-      s[len] = '\0';
-
-      *str += len;
-   }
-   else {
-      len++;
-   }
-
-   return len;
-}
-
-
-static size_t
-make_extension_string_es1(const GLcontext *ctx, GLubyte *str)
-{
-   size_t len = 0;
-
-   /* Core additions */
-   len += append_extension(&str, "GL_OES_byte_coordinates");
-   len += append_extension(&str, "GL_OES_fixed_point");
-   len += append_extension(&str, "GL_OES_single_precision");
-   len += append_extension(&str, "GL_OES_matrix_get");
-
-   /* 1.1 required extensions */
-   len += append_extension(&str, "GL_OES_read_format");
-   len += append_extension(&str, "GL_OES_compressed_paletted_texture");
-   len += append_extension(&str, "GL_OES_point_size_array");
-   len += append_extension(&str, "GL_OES_point_sprite");
-
-   /* 1.1 deprecated extensions */
-   len += append_extension(&str, "GL_OES_query_matrix");
-
-#if FEATURE_OES_draw_texture
-   if (ctx->Extensions.OES_draw_texture)
-      len += append_extension(&str, "GL_OES_draw_texture");
-#endif
-
-   if (ctx->Extensions.EXT_blend_equation_separate)
-      len += append_extension(&str, "GL_OES_blend_equation_separate");
-   if (ctx->Extensions.EXT_blend_func_separate)
-      len += append_extension(&str, "GL_OES_blend_func_separate");
-   if (ctx->Extensions.EXT_blend_subtract)
-      len += append_extension(&str, "GL_OES_blend_subtract");
-
-   if (ctx->Extensions.EXT_stencil_wrap)
-      len += append_extension(&str, "GL_OES_stencil_wrap");
-
-   if (ctx->Extensions.ARB_texture_cube_map)
-      len += append_extension(&str, "GL_OES_texture_cube_map");
-   if (ctx->Extensions.ARB_texture_env_crossbar)
-      len += append_extension(&str, "GL_OES_texture_env_crossbar");
-   if (ctx->Extensions.ARB_texture_mirrored_repeat)
-      len += append_extension(&str, "GL_OES_texture_mirrored_repeat");
-
-   if (ctx->Extensions.ARB_framebuffer_object) {
-      len += append_extension(&str, "GL_OES_framebuffer_object");
-      len += append_extension(&str, "GL_OES_depth24");
-      len += append_extension(&str, "GL_OES_depth32");
-      len += append_extension(&str, "GL_OES_fbo_render_mipmap");
-      len += append_extension(&str, "GL_OES_rgb8_rgba8");
-      len += append_extension(&str, "GL_OES_stencil1");
-      len += append_extension(&str, "GL_OES_stencil4");
-      len += append_extension(&str, "GL_OES_stencil8");
-   }
-
-   if (ctx->Extensions.EXT_vertex_array)
-      len += append_extension(&str, "GL_OES_element_index_uint");
-   if (ctx->Extensions.ARB_vertex_buffer_object)
-      len += append_extension(&str, "GL_OES_mapbuffer");
-   if (ctx->Extensions.EXT_texture_filter_anisotropic)
-      len += append_extension(&str, "GL_EXT_texture_filter_anisotropic");
-
-   /* some applications check this for NPOT support */
-   if (ctx->Extensions.ARB_texture_non_power_of_two)
-      len += append_extension(&str, "GL_ARB_texture_non_power_of_two");
-
-   if (ctx->Extensions.EXT_texture_compression_s3tc)
-      len += append_extension(&str, "GL_EXT_texture_compression_dxt1");
-   if (ctx->Extensions.EXT_texture_lod_bias)
-      len += append_extension(&str, "GL_EXT_texture_lod_bias");
-   if (ctx->Extensions.EXT_blend_minmax)
-      len += append_extension(&str, "GL_EXT_blend_minmax");
-   if (ctx->Extensions.EXT_multi_draw_arrays)
-      len += append_extension(&str, "GL_EXT_multi_draw_arrays");
-
-#if FEATURE_OES_EGL_image
-   if (ctx->Extensions.OES_EGL_image)
-      len += append_extension(&str, "GL_OES_EGL_image");
-#endif
-
-   return len;
-}
-
-
-static GLubyte *
-compute_extensions_es1(const GLcontext *ctx)
-{
-   GLubyte *s;
-   unsigned int len;
-   
-   len = make_extension_string_es1(ctx, NULL);
-   s = malloc(len + 1);
-   if (!s)
-      return NULL;
-   make_extension_string_es1(ctx, s);
-   
-   return s;
-}
-
-static size_t
-make_extension_string_es2(const GLcontext *ctx, GLubyte *str)
-{
-   size_t len = 0;
-
-   len += append_extension(&str, "GL_OES_compressed_paletted_texture");
-
-   if (ctx->Extensions.ARB_framebuffer_object) {
-      len += append_extension(&str, "GL_OES_depth24");
-      len += append_extension(&str, "GL_OES_depth32");
-      len += append_extension(&str, "GL_OES_fbo_render_mipmap");
-      len += append_extension(&str, "GL_OES_rgb8_rgba8");
-      len += append_extension(&str, "GL_OES_stencil1");
-      len += append_extension(&str, "GL_OES_stencil4");
-   }
-
-   if (ctx->Extensions.EXT_vertex_array)
-      len += append_extension(&str, "GL_OES_element_index_uint");
-   if (ctx->Extensions.ARB_vertex_buffer_object)
-      len += append_extension(&str, "GL_OES_mapbuffer");
-
-   if (ctx->Extensions.EXT_texture3D)
-      len += append_extension(&str, "GL_OES_texture_3D");
-   if (ctx->Extensions.ARB_texture_non_power_of_two)
-      len += append_extension(&str, "GL_OES_texture_npot");
-   if (ctx->Extensions.EXT_texture_filter_anisotropic)
-      len += append_extension(&str, "GL_EXT_texture_filter_anisotropic");
-
-   len += append_extension(&str, "GL_EXT_texture_type_2_10_10_10_REV");
-   if (ctx->Extensions.ARB_depth_texture)
-      len += append_extension(&str, "GL_OES_depth_texture");
-   if (ctx->Extensions.EXT_packed_depth_stencil)
-      len += append_extension(&str, "GL_OES_packed_depth_stencil");
-   if (ctx->Extensions.ARB_fragment_shader)
-      len += append_extension(&str, "GL_OES_standard_derivatives");
-
-   if (ctx->Extensions.EXT_texture_compression_s3tc)
-      len += append_extension(&str, "GL_EXT_texture_compression_dxt1");
-   if (ctx->Extensions.EXT_blend_minmax)
-      len += append_extension(&str, "GL_EXT_blend_minmax");
-   if (ctx->Extensions.EXT_multi_draw_arrays)
-      len += append_extension(&str, "GL_EXT_multi_draw_arrays");
-
-#if FEATURE_OES_EGL_image
-   if (ctx->Extensions.OES_EGL_image)
-      len += append_extension(&str, "GL_OES_EGL_image");
-#endif
-
-   return len;
-}
-
-static GLubyte *
-compute_extensions_es2(GLcontext *ctx)
-{
-   GLubyte *s;
-   unsigned int len;
-
-   len = make_extension_string_es2(ctx, NULL);
-   s = malloc(len + 1);
-   if (!s)
-      return NULL;
-   make_extension_string_es2(ctx, s);
-   
-   return s;
-}
-
-
-GLubyte *
-_mesa_make_extension_string(GLcontext *ctx)
-{
-   switch (ctx->API) {
-   case API_OPENGL:
-      return compute_extensions(ctx);
-   case API_OPENGLES2:
-      return compute_extensions_es2(ctx);
-   case API_OPENGLES:
-      return compute_extensions_es1(ctx);
-   default:
-      assert(0);
-      return NULL;
-   }
-}
-
-/**
- * Return number of enabled extensions.
- */
-GLuint
-_mesa_get_extension_count(GLcontext *ctx)
-{
-   GLuint i;
-
-   /* only count once */
-   if (!ctx->Extensions.Count) {
-      for (i = 0; i < Elements(default_extensions); i++) {
-         if (extension_enabled(ctx, i)) {
-            ctx->Extensions.Count++;
-         }
-      }
-   }
-
-   if (0)
-      _mesa_debug(ctx, "%u of %d extensions enabled\n", ctx->Extensions.Count,
-                  (int) Elements(default_extensions));
-
-   return ctx->Extensions.Count;
-}
-
-
-/**
- * Return name of i-th enabled extension
- */
-const GLubyte *
-_mesa_get_enabled_extension(GLcontext *ctx, GLuint index)
-{
-   GLuint i;
-
-   for (i = 0; i < Elements(default_extensions); i++) {
-      if (extension_enabled(ctx, i)) {
-         if (index == 0)
-            return (const GLubyte *) default_extensions[i].name;
-         index--;
-      }
-   }
-
-   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.

+ */

+

+

+#include "glheader.h"

+#include "imports.h"

+#include "context.h"

+#include "extensions.h"

+#include "mtypes.h"

+

+

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

+#define ON GL_TRUE

+#define OFF GL_FALSE

+

+

+/*

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

+ */

+static const struct {

+   GLboolean enabled;

+   const char *name;

+   int flag_offset;

+} default_extensions[] = {

+   { OFF, "GL_ARB_blend_func_extended",        F(ARB_blend_func_extended) },

+   { ON,  "GL_ARB_copy_buffer",                F(ARB_copy_buffer) },

+   { OFF, "GL_ARB_depth_buffer_float",         F(ARB_depth_buffer_float) },

+   { OFF, "GL_ARB_depth_clamp",                F(ARB_depth_clamp) },

+   { OFF, "GL_ARB_depth_texture",              F(ARB_depth_texture) },

+   { ON,  "GL_ARB_draw_buffers",               F(ARB_draw_buffers) },

+   { OFF, "GL_ARB_draw_elements_base_vertex",  F(ARB_draw_elements_base_vertex) },

+   { OFF, "GL_ARB_draw_instanced",             F(ARB_draw_instanced) },

+   { OFF, "GL_ARB_explicit_attrib_location",   F(ARB_explicit_attrib_location) },

+   { OFF, "GL_ARB_fragment_coord_conventions", F(ARB_fragment_coord_conventions) },

+   { OFF, "GL_ARB_fragment_program",           F(ARB_fragment_program) },

+   { OFF, "GL_ARB_fragment_program_shadow",    F(ARB_fragment_program_shadow) },

+   { OFF, "GL_ARB_fragment_shader",            F(ARB_fragment_shader) },

+   { OFF, "GL_ARB_framebuffer_object",         F(ARB_framebuffer_object) },

+   /* TODO: reenable this when the new GLSL compiler actually supports them */

+   /* { OFF, "GL_ARB_geometry_shader4",           F(ARB_geometry_shader4) }, */

+   { OFF, "GL_ARB_half_float_pixel",           F(ARB_half_float_pixel) },

+   { OFF, "GL_ARB_half_float_vertex",          F(ARB_half_float_vertex) },

+   { OFF, "GL_ARB_instanced_arrays",           F(ARB_instanced_arrays) },

+   { OFF, "GL_ARB_map_buffer_range",           F(ARB_map_buffer_range) },

+   { ON,  "GL_ARB_multisample",                F(ARB_multisample) },

+   { OFF, "GL_ARB_multitexture",               F(ARB_multitexture) },

+   { OFF, "GL_ARB_occlusion_query",            F(ARB_occlusion_query) },

+   { OFF, "GL_ARB_occlusion_query2",           F(ARB_occlusion_query2) },

+   { OFF, "GL_ARB_pixel_buffer_object",        F(EXT_pixel_buffer_object) },

+   { OFF, "GL_ARB_point_parameters",           F(EXT_point_parameters) },

+   { OFF, "GL_ARB_point_sprite",               F(ARB_point_sprite) },

+   { OFF, "GL_ARB_provoking_vertex",           F(EXT_provoking_vertex) },

+   { OFF, "GL_ARB_sampler_objects",            F(ARB_sampler_objects) },

+   { OFF, "GL_ARB_seamless_cube_map",          F(ARB_seamless_cube_map) },

+   { OFF, "GL_ARB_shader_objects",             F(ARB_shader_objects) },

+   { OFF, "GL_ARB_shader_stencil_export",      F(ARB_shader_stencil_export) },

+   { OFF, "GL_ARB_shading_language_100",       F(ARB_shading_language_100) },

+   { OFF, "GL_ARB_shadow",                     F(ARB_shadow) },

+   { OFF, "GL_ARB_shadow_ambient",             F(ARB_shadow_ambient) },

+   { OFF, "GL_ARB_sync",                       F(ARB_sync) },

+   { OFF, "GL_ARB_texture_border_clamp",       F(ARB_texture_border_clamp) },

+   { OFF, "GL_ARB_texture_buffer_object",      F(ARB_texture_buffer_object) },

+   { ON,  "GL_ARB_texture_compression",        F(ARB_texture_compression) },

+   { OFF, "GL_ARB_texture_compression_rgtc",   F(ARB_texture_compression_rgtc) },

+   { OFF, "GL_ARB_texture_cube_map",           F(ARB_texture_cube_map) },

+   { OFF, "GL_ARB_texture_env_add",            F(EXT_texture_env_add) },

+   { OFF, "GL_ARB_texture_env_combine",        F(ARB_texture_env_combine) },

+   { OFF, "GL_ARB_texture_env_crossbar",       F(ARB_texture_env_crossbar) },

+   { OFF, "GL_ARB_texture_env_dot3",           F(ARB_texture_env_dot3) },

+   { OFF, "GL_MESAX_texture_float",            F(ARB_texture_float) },

+   { OFF, "GL_ARB_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},

+   { OFF, "GL_ARB_texture_multisample",        F(ARB_texture_multisample) },

+   { OFF, "GL_ARB_texture_non_power_of_two",   F(ARB_texture_non_power_of_two)},

+   { OFF, "GL_ARB_texture_rectangle",          F(NV_texture_rectangle) },

+   { OFF, "GL_ARB_texture_rg",                 F(ARB_texture_rg) },

+   { OFF, "GL_ARB_texture_rgb10_a2ui",         F(ARB_texture_rgb10_a2ui) },

+   { OFF, "GL_ARB_texture_swizzle",            F(EXT_texture_swizzle) },

+   { ON,  "GL_ARB_transpose_matrix",           F(ARB_transpose_matrix) },

+   { OFF, "GL_ARB_transform_feedback2",        F(ARB_transform_feedback2) },

+   { OFF, "GL_ARB_uniform_buffer_object",      F(ARB_uniform_buffer_object) },

+   { OFF, "GL_ARB_vertex_array_bgra",          F(EXT_vertex_array_bgra) },

+   { OFF, "GL_ARB_vertex_array_object",        F(ARB_vertex_array_object) },

+   { ON,  "GL_ARB_vertex_buffer_object",       F(ARB_vertex_buffer_object) },

+   { OFF, "GL_ARB_vertex_program",             F(ARB_vertex_program) },

+   { OFF, "GL_ARB_vertex_shader",              F(ARB_vertex_shader) },

+   { OFF, "GL_ARB_vertex_type_2_10_10_10_rev", F(ARB_vertex_type_2_10_10_10_rev) },

+   { ON,  "GL_ARB_window_pos",                 F(ARB_window_pos) },

+   { ON,  "GL_EXT_abgr",                       F(EXT_abgr) },

+   { ON,  "GL_EXT_bgra",                       F(EXT_bgra) },

+   { OFF, "GL_EXT_blend_color",                F(EXT_blend_color) },

+   { OFF, "GL_EXT_blend_equation_separate",    F(EXT_blend_equation_separate) },

+   { OFF, "GL_EXT_blend_func_separate",        F(EXT_blend_func_separate) },

+   { OFF, "GL_EXT_blend_logic_op",             F(EXT_blend_logic_op) },

+   { OFF, "GL_EXT_blend_minmax",               F(EXT_blend_minmax) },

+   { OFF, "GL_EXT_blend_subtract",             F(EXT_blend_subtract) },

+   { OFF, "GL_EXT_clip_volume_hint",           F(EXT_clip_volume_hint) },

+   { ON,  "GL_EXT_compiled_vertex_array",      F(EXT_compiled_vertex_array) },

+   { ON,  "GL_EXT_copy_texture",               F(EXT_copy_texture) },

+   { OFF, "GL_EXT_depth_bounds_test",          F(EXT_depth_bounds_test) },

+   { OFF, "GL_EXT_draw_buffers2",              F(EXT_draw_buffers2) },

+   { OFF, "GL_EXT_draw_instanced",             F(ARB_draw_instanced) },

+   { ON,  "GL_EXT_draw_range_elements",        F(EXT_draw_range_elements) },

+   { OFF, "GL_EXT_framebuffer_blit",           F(EXT_framebuffer_blit) },

+   { OFF, "GL_EXT_framebuffer_multisample",    F(EXT_framebuffer_multisample) },

+   { OFF, "GL_EXT_framebuffer_object",         F(EXT_framebuffer_object) },

+   { OFF, "GL_EXT_framebuffer_sRGB",           F(EXT_framebuffer_sRGB) },

+   { OFF, "GL_EXT_fog_coord",                  F(EXT_fog_coord) },

+   { OFF, "GL_EXT_gpu_program_parameters",     F(EXT_gpu_program_parameters) },

+   { OFF, "GL_EXT_gpu_shader4",                F(EXT_gpu_shader4) },

+   { ON,  "GL_EXT_multi_draw_arrays",          F(EXT_multi_draw_arrays) },

+   { OFF, "GL_EXT_packed_depth_stencil",       F(EXT_packed_depth_stencil) },

+   { OFF, "GL_EXT_packed_float",               F(EXT_packed_float) },

+   { ON,  "GL_EXT_packed_pixels",              F(EXT_packed_pixels) },

+   { OFF, "GL_EXT_paletted_texture",           F(EXT_paletted_texture) },

+   { OFF, "GL_EXT_pixel_buffer_object",        F(EXT_pixel_buffer_object) },

+   { OFF, "GL_EXT_point_parameters",           F(EXT_point_parameters) },

+   { ON,  "GL_EXT_polygon_offset",             F(EXT_polygon_offset) },

+   { OFF, "GL_EXT_provoking_vertex",           F(EXT_provoking_vertex) },

+   { ON,  "GL_EXT_rescale_normal",             F(EXT_rescale_normal) },

+   { OFF, "GL_EXT_secondary_color",            F(EXT_secondary_color) },

+   { OFF, "GL_EXT_separate_shader_objects",    F(EXT_separate_shader_objects) },

+   { ON,  "GL_EXT_separate_specular_color",    F(EXT_separate_specular_color) },

+   { OFF, "GL_EXT_shadow_funcs",               F(EXT_shadow_funcs) },

+   { OFF, "GL_EXT_shared_texture_palette",     F(EXT_shared_texture_palette) },

+   { OFF, "GL_EXT_stencil_two_side",           F(EXT_stencil_two_side) },

+   { OFF, "GL_EXT_stencil_wrap",               F(EXT_stencil_wrap) },

+   { ON,  "GL_EXT_subtexture",                 F(EXT_subtexture) },

+   { ON,  "GL_EXT_texture",                    F(EXT_texture) },

+   { ON,  "GL_EXT_texture3D",                  F(EXT_texture3D) },

+   { OFF, "GL_EXT_texture_array",              F(EXT_texture_array) },

+   { OFF, "GL_EXT_texture_compression_s3tc",   F(EXT_texture_compression_s3tc) },

+   { OFF, "GL_EXT_texture_compression_rgtc",   F(ARB_texture_compression_rgtc) },

+   { OFF, "GL_EXT_texture_cube_map",           F(ARB_texture_cube_map) },

+   { ON,  "GL_EXT_texture_edge_clamp",         F(SGIS_texture_edge_clamp) },

+   { OFF, "GL_EXT_texture_env_add",            F(EXT_texture_env_add) },

+   { OFF, "GL_EXT_texture_env_combine",        F(EXT_texture_env_combine) },

+   { OFF, "GL_EXT_texture_env_dot3",           F(EXT_texture_env_dot3) },

+   { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },

+   { OFF, "GL_EXT_texture_integer",            F(EXT_texture_integer) },

+   { OFF, "GL_EXT_texture_lod_bias",           F(EXT_texture_lod_bias) },

+   { OFF, "GL_EXT_texture_mirror_clamp",       F(EXT_texture_mirror_clamp) },

+   { ON,  "GL_EXT_texture_object",             F(EXT_texture_object) },

+   { OFF, "GL_EXT_texture_rectangle",          F(NV_texture_rectangle) },

+   { OFF, "GL_EXT_texture_shared_exponent",    F(EXT_texture_shared_exponent) },

+   { OFF, "GL_EXT_texture_sRGB",               F(EXT_texture_sRGB) },

+   { OFF, "GL_EXT_texture_swizzle",            F(EXT_texture_swizzle) },

+   { OFF, "GL_EXT_timer_query",                F(EXT_timer_query) },

+   { OFF, "GL_EXT_transform_feedback",         F(EXT_transform_feedback) },

+   { ON,  "GL_EXT_vertex_array",               F(EXT_vertex_array) },

+   { OFF, "GL_EXT_vertex_array_bgra",          F(EXT_vertex_array_bgra) },

+   { OFF, "GL_EXT_vertex_array_set",           F(EXT_vertex_array_set) },

+   { OFF, "GL_3DFX_texture_compression_FXT1",  F(TDFX_texture_compression_FXT1) },

+   { OFF, "GL_APPLE_client_storage",           F(APPLE_client_storage) },

+   { ON,  "GL_APPLE_packed_pixels",            F(APPLE_packed_pixels) },

+   { OFF, "GL_APPLE_vertex_array_object",      F(APPLE_vertex_array_object) },

+   { OFF, "GL_APPLE_object_purgeable",         F(APPLE_object_purgeable) },

+   { OFF, "GL_ATI_blend_equation_separate",    F(EXT_blend_equation_separate) },

+   { OFF, "GL_ATI_envmap_bumpmap",             F(ATI_envmap_bumpmap) },

+   { OFF, "GL_ATI_texture_env_combine3",       F(ATI_texture_env_combine3)},

+   { OFF, "GL_ATI_texture_mirror_once",        F(ATI_texture_mirror_once)},

+   { OFF, "GL_ATI_fragment_shader",            F(ATI_fragment_shader)},

+   { OFF, "GL_ATI_separate_stencil",           F(ATI_separate_stencil)},

+   { ON,  "GL_IBM_multimode_draw_arrays",      F(IBM_multimode_draw_arrays) },

+   { ON,  "GL_IBM_rasterpos_clip",             F(IBM_rasterpos_clip) },

+   { OFF, "GL_IBM_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},

+   { OFF, "GL_INGR_blend_func_separate",       F(EXT_blend_func_separate) },

+   { OFF, "GL_MESA_pack_invert",               F(MESA_pack_invert) },

+   { OFF, "GL_MESA_resize_buffers",            F(MESA_resize_buffers) },

+   { OFF, "GL_MESA_texture_array",             F(MESA_texture_array) },

+   { OFF, "GL_MESA_texture_signed_rgba",       F(MESA_texture_signed_rgba) },

+   { OFF, "GL_MESA_ycbcr_texture",             F(MESA_ycbcr_texture) },

+   { ON,  "GL_MESA_window_pos",                F(ARB_window_pos) },

+   { OFF, "GL_NV_blend_square",                F(NV_blend_square) },

+   { OFF, "GL_NV_conditional_render",          F(NV_conditional_render) },

+   { OFF, "GL_NV_depth_clamp",                 F(ARB_depth_clamp) },

+   { OFF, "GL_NV_fragment_program",            F(NV_fragment_program) },

+   { OFF, "GL_NV_fragment_program_option",     F(NV_fragment_program_option) },

+   { ON,  "GL_NV_light_max_exponent",          F(NV_light_max_exponent) },

+   { OFF, "GL_NV_packed_depth_stencil",        F(EXT_packed_depth_stencil) },

+   { OFF, "GL_NV_point_sprite",                F(NV_point_sprite) },

+   { OFF, "GL_NV_primitive_restart",           F(NV_primitive_restart) },

+   { ON,  "GL_NV_texgen_reflection",           F(NV_texgen_reflection) },

+   { OFF, "GL_NV_texture_env_combine4",        F(NV_texture_env_combine4) },

+   { OFF, "GL_NV_texture_rectangle",           F(NV_texture_rectangle) },

+   { OFF, "GL_NV_vertex_program",              F(NV_vertex_program) },

+   { OFF, "GL_NV_vertex_program1_1",           F(NV_vertex_program1_1) },

+   { ON,  "GL_OES_read_format",                F(OES_read_format) },

+   { OFF, "GL_SGI_texture_color_table",        F(SGI_texture_color_table) },

+   { ON,  "GL_SGIS_generate_mipmap",           F(SGIS_generate_mipmap) },

+   { OFF, "GL_SGIS_texture_border_clamp",      F(ARB_texture_border_clamp) },

+   { ON,  "GL_SGIS_texture_edge_clamp",        F(SGIS_texture_edge_clamp) },

+   { ON,  "GL_SGIS_texture_lod",               F(SGIS_texture_lod) },

+   { ON,  "GL_SUN_multi_draw_arrays",          F(EXT_multi_draw_arrays) },

+   { OFF, "GL_S3_s3tc",                        F(S3_s3tc) },

+   { OFF, "GL_EXT_texture_format_BGRA8888",    F(EXT_texture_format_BGRA8888) },

+#if FEATURE_OES_EGL_image

+   { OFF, "GL_OES_EGL_image",                  F(OES_EGL_image) },

+#endif

+#if FEATURE_OES_draw_texture

+   { OFF, "GL_OES_draw_texture",               F(OES_draw_texture) },

+#endif /* FEATURE_OES_draw_texture */

+};

+

+

+

+/**

+ * 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_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_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_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_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;

+#if FEATURE_EXT_texture_sRGB

+   ctx->Extensions.EXT_texture_sRGB = 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.SGI_texture_color_table = GL_TRUE;

+   /*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 )

+{

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

+   GLuint i;

+

+   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;

+   }

+

+   for (i = 0 ; i < Elements(default_extensions) ; i++) {

+      if (strcmp(default_extensions[i].name, name) == 0) {

+         if (default_extensions[i].flag_offset) {

+            GLboolean *enabled = base + default_extensions[i].flag_offset;

+            *enabled = state;

+         }

+         return GL_TRUE;

+      }

+   }

+   return GL_FALSE;

+}

+

+

+/**

+ * 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);

+}

+

+

+/**

+ * Check if the i-th extension is enabled.

+ */

+static GLboolean

+extension_enabled(struct gl_context *ctx, GLuint index)

+{

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

+   if (!default_extensions[index].flag_offset ||

+       *(base + default_extensions[index].flag_offset)) {

+      return GL_TRUE;

+   }

+   else {

+      return GL_FALSE;

+   }

+}

+

+

+/**

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

+ */

+GLboolean

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

+{

+   GLuint i;

+

+   for (i = 0 ; i < Elements(default_extensions) ; i++) {

+      if (strcmp(default_extensions[i].name, name) == 0) {

+         return extension_enabled(ctx, i);

+      }

+   }

+   return GL_FALSE;

+}

+

+

+/**

+ * Append string 'b' onto string 'a'.  Free 'a' and return new string.

+ */

+static char *

+append(const char *a, const char *b)

+{

+   const GLuint aLen = a ? strlen(a) : 0;

+   const GLuint bLen = b ? strlen(b) : 0;

+   char *s = calloc(1, aLen + bLen + 1);

+   if (s) {

+      if (a)

+         memcpy(s, a, aLen);

+      if (b)

+         memcpy(s + aLen, b, bLen);

+      s[aLen + bLen] = '\0';

+   }

+   if (a)

+      free((void *) a);

+   return s;

+}

+

+

+/**

+ * Check the MESA_EXTENSION_OVERRIDE env var.

+ * For extension names that are recognized, turn them on.  For extension

+ * names that are recognized and prefixed with '-', turn them off.

+ * Return a string of the unknown/leftover names.

+ */

+static const char *

+get_extension_override( struct gl_context *ctx )

+{

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

+   char *extraExt = NULL;

+   char ext[1000];

+   GLuint extLen = 0;

+   GLuint i;

+   GLboolean disableExt = GL_FALSE;

+

+   if (!envExt)

+      return NULL;

+

+   for (i = 0; ; i++) {

+      if (envExt[i] == '\0' || envExt[i] == ' ') {

+         /* terminate/process 'ext' if extLen > 0 */

+         if (extLen > 0) {

+            assert(extLen < sizeof(ext));

+            /* enable extension named by 'ext' */

+            ext[extLen] = 0;

+            if (!set_extension(ctx, ext, !disableExt)) {

+               /* unknown extension name, append it to extraExt */

+               if (extraExt) {

+                  extraExt = append(extraExt, " ");

+               }

+               extraExt = append(extraExt, ext);

+            }

+            extLen = 0;

+            disableExt = GL_FALSE;

+         }

+         if (envExt[i] == '\0')

+            break;

+      }

+      else if (envExt[i] == '-') {

+         disableExt = GL_TRUE;

+      }

+      else {

+         /* accumulate this non-space character */

+         ext[extLen++] = envExt[i];

+      }

+   }

+

+   return extraExt;

+}

+

+

+/**

+ * Run through the default_extensions array above and set the

+ * ctx->Extensions.ARB/EXT_* flags accordingly.

+ * To be called during context initialization.

+ */

+void

+_mesa_init_extensions( struct gl_context *ctx )

+{

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

+   GLuint i;

+

+   for (i = 0 ; i < Elements(default_extensions) ; i++) {

+      if (default_extensions[i].enabled &&

+          default_extensions[i].flag_offset) {

+         *(base + default_extensions[i].flag_offset) = GL_TRUE;

+      }

+   }

+}

+

+

+/**

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

+ * glGetString(GL_EXTENSIONS) is called.

+ */

+static GLubyte *

+compute_extensions( struct gl_context *ctx )

+{

+   const char *extraExt = get_extension_override(ctx);

+   GLuint extStrLen = 0;

+   char *s;

+   GLuint i;

+

+   /* first, compute length of the extension string */

+   for (i = 0 ; i < Elements(default_extensions) ; i++) {

+      if (extension_enabled(ctx, i)) {

+         extStrLen += (GLuint) strlen(default_extensions[i].name) + 1;

+      }

+   }

+

+   if (extraExt)

+      extStrLen += strlen(extraExt) + 1; /* +1 for space */

+

+   /* allocate the extension string */

+   s = (char *) malloc(extStrLen);

+   if (!s)

+      return NULL;

+

+   /* second, build the extension string */

+   extStrLen = 0;

+   for (i = 0 ; i < Elements(default_extensions) ; i++) {

+      if (extension_enabled(ctx, i)) {

+         GLuint len = (GLuint) strlen(default_extensions[i].name);

+         memcpy(s + extStrLen, default_extensions[i].name, len);

+         extStrLen += len;

+         s[extStrLen] = ' ';

+         extStrLen++;

+      }

+   }

+   ASSERT(extStrLen > 0);

+

+   s[extStrLen - 1] = 0; /* -1 to overwrite trailing the ' ' */

+

+   if (extraExt) {

+      s = append(s, " ");

+      s = append(s, extraExt);

+   }

+

+   return (GLubyte *) s;

+}

+

+static size_t

+append_extension(GLubyte **str, const char *ext)

+{

+   GLubyte *s = *str;

+   size_t len = strlen(ext);

+

+   if (s) {

+      memcpy(s, ext, len);

+      s[len++] = ' ';

+      s[len] = '\0';

+

+      *str += len;

+   }

+   else {

+      len++;

+   }

+

+   return len;

+}

+

+

+static size_t

+make_extension_string_es1(const struct gl_context *ctx, GLubyte *str)

+{

+   size_t len = 0;

+

+   /* Core additions */

+   len += append_extension(&str, "GL_OES_byte_coordinates");

+   len += append_extension(&str, "GL_OES_fixed_point");

+   len += append_extension(&str, "GL_OES_single_precision");

+   len += append_extension(&str, "GL_OES_matrix_get");

+

+   /* 1.1 required extensions */

+   len += append_extension(&str, "GL_OES_read_format");

+   len += append_extension(&str, "GL_OES_compressed_paletted_texture");

+   len += append_extension(&str, "GL_OES_point_size_array");

+   len += append_extension(&str, "GL_OES_point_sprite");

+

+   /* 1.1 deprecated extensions */

+   len += append_extension(&str, "GL_OES_query_matrix");

+

+#if FEATURE_OES_draw_texture

+   if (ctx->Extensions.OES_draw_texture)

+      len += append_extension(&str, "GL_OES_draw_texture");

+#endif

+

+   if (ctx->Extensions.EXT_blend_equation_separate)

+      len += append_extension(&str, "GL_OES_blend_equation_separate");

+   if (ctx->Extensions.EXT_blend_func_separate)

+      len += append_extension(&str, "GL_OES_blend_func_separate");

+   if (ctx->Extensions.EXT_blend_subtract)

+      len += append_extension(&str, "GL_OES_blend_subtract");

+

+   if (ctx->Extensions.EXT_stencil_wrap)

+      len += append_extension(&str, "GL_OES_stencil_wrap");

+

+   if (ctx->Extensions.ARB_texture_cube_map)

+      len += append_extension(&str, "GL_OES_texture_cube_map");

+   if (ctx->Extensions.ARB_texture_env_crossbar)

+      len += append_extension(&str, "GL_OES_texture_env_crossbar");

+   if (ctx->Extensions.ARB_texture_mirrored_repeat)

+      len += append_extension(&str, "GL_OES_texture_mirrored_repeat");

+

+   if (ctx->Extensions.ARB_framebuffer_object) {

+      len += append_extension(&str, "GL_OES_framebuffer_object");

+      len += append_extension(&str, "GL_OES_depth24");

+      len += append_extension(&str, "GL_OES_depth32");

+      len += append_extension(&str, "GL_OES_fbo_render_mipmap");

+      len += append_extension(&str, "GL_OES_rgb8_rgba8");

+      len += append_extension(&str, "GL_OES_stencil1");

+      len += append_extension(&str, "GL_OES_stencil4");

+      len += append_extension(&str, "GL_OES_stencil8");

+   }

+

+   if (ctx->Extensions.EXT_vertex_array)

+      len += append_extension(&str, "GL_OES_element_index_uint");

+   if (ctx->Extensions.ARB_vertex_buffer_object)

+      len += append_extension(&str, "GL_OES_mapbuffer");

+   if (ctx->Extensions.EXT_texture_filter_anisotropic)

+      len += append_extension(&str, "GL_EXT_texture_filter_anisotropic");

+

+   /* some applications check this for NPOT support */

+   if (ctx->Extensions.ARB_texture_non_power_of_two)

+      len += append_extension(&str, "GL_ARB_texture_non_power_of_two");

+

+   if (ctx->Extensions.EXT_texture_compression_s3tc)

+      len += append_extension(&str, "GL_EXT_texture_compression_dxt1");

+   if (ctx->Extensions.EXT_texture_lod_bias)

+      len += append_extension(&str, "GL_EXT_texture_lod_bias");

+   if (ctx->Extensions.EXT_blend_minmax)

+      len += append_extension(&str, "GL_EXT_blend_minmax");

+   if (ctx->Extensions.EXT_multi_draw_arrays)

+      len += append_extension(&str, "GL_EXT_multi_draw_arrays");

+

+#if FEATURE_OES_EGL_image

+   if (ctx->Extensions.OES_EGL_image)

+      len += append_extension(&str, "GL_OES_EGL_image");

+#endif

+

+   return len;

+}

+

+

+static GLubyte *

+compute_extensions_es1(const struct gl_context *ctx)

+{

+   GLubyte *s;

+   unsigned int len;

+   

+   len = make_extension_string_es1(ctx, NULL);

+   s = malloc(len + 1);

+   if (!s)

+      return NULL;

+   make_extension_string_es1(ctx, s);

+   

+   return s;

+}

+

+static size_t

+make_extension_string_es2(const struct gl_context *ctx, GLubyte *str)

+{

+   size_t len = 0;

+

+   if (ctx->Extensions.ARB_framebuffer_object) {

+      len += append_extension(&str, "GL_OES_depth24");

+      len += append_extension(&str, "GL_OES_depth32");

+      len += append_extension(&str, "GL_OES_fbo_render_mipmap");

+      len += append_extension(&str, "GL_OES_rgb8_rgba8");

+      len += append_extension(&str, "GL_OES_stencil1");

+      len += append_extension(&str, "GL_OES_stencil4");

+   }

+

+   if (ctx->Extensions.EXT_vertex_array)

+      len += append_extension(&str, "GL_OES_element_index_uint");

+   if (ctx->Extensions.ARB_vertex_buffer_object)

+      len += append_extension(&str, "GL_OES_mapbuffer");

+

+#if 0

+   /* disabled because of missing GLSL support */

+   if (ctx->Extensions.EXT_texture3D)

+      len += append_extension(&str, "GL_OES_texture_3D");

+#endif

+

+   if (ctx->Extensions.ARB_texture_non_power_of_two)

+      len += append_extension(&str, "GL_OES_texture_npot");

+   if (ctx->Extensions.EXT_texture_filter_anisotropic)

+      len += append_extension(&str, "GL_EXT_texture_filter_anisotropic");

+

+   len += append_extension(&str, "GL_EXT_texture_type_2_10_10_10_REV");

+   if (ctx->Extensions.ARB_depth_texture)

+      len += append_extension(&str, "GL_OES_depth_texture");

+   if (ctx->Extensions.EXT_packed_depth_stencil)

+      len += append_extension(&str, "GL_OES_packed_depth_stencil");

+   if (ctx->Extensions.ARB_fragment_shader)

+      len += append_extension(&str, "GL_OES_standard_derivatives");

+

+   if (ctx->Extensions.EXT_texture_compression_s3tc)

+      len += append_extension(&str, "GL_EXT_texture_compression_dxt1");

+   if (ctx->Extensions.EXT_blend_minmax)

+      len += append_extension(&str, "GL_EXT_blend_minmax");

+   if (ctx->Extensions.EXT_multi_draw_arrays)

+      len += append_extension(&str, "GL_EXT_multi_draw_arrays");

+

+#if FEATURE_OES_EGL_image

+   if (ctx->Extensions.OES_EGL_image)

+      len += append_extension(&str, "GL_OES_EGL_image");

+#endif

+

+   if (ctx->Extensions.EXT_texture_format_BGRA8888)

+      len += append_extension(&str, "GL_EXT_texture_format_BGRA8888");

+

+   return len;

+}

+

+static GLubyte *

+compute_extensions_es2(struct gl_context *ctx)

+{

+   GLubyte *s;

+   unsigned int len;

+

+   len = make_extension_string_es2(ctx, NULL);

+   s = malloc(len + 1);

+   if (!s)

+      return NULL;

+   make_extension_string_es2(ctx, s);

+   

+   return s;

+}

+

+

+GLubyte *

+_mesa_make_extension_string(struct gl_context *ctx)

+{

+   switch (ctx->API) {

+   case API_OPENGL:

+      return compute_extensions(ctx);

+   case API_OPENGLES2:

+      return compute_extensions_es2(ctx);

+   case API_OPENGLES:

+      return compute_extensions_es1(ctx);

+   default:

+      assert(0);

+      return NULL;

+   }

+}

+

+/**

+ * Return number of enabled extensions.

+ */

+GLuint

+_mesa_get_extension_count(struct gl_context *ctx)

+{

+   GLuint i;

+

+   /* only count once */

+   if (!ctx->Extensions.Count) {

+      for (i = 0; i < Elements(default_extensions); i++) {

+         if (extension_enabled(ctx, i)) {

+            ctx->Extensions.Count++;

+         }

+      }

+   }

+

+   if (0)

+      _mesa_debug(ctx, "%u of %d extensions enabled\n", ctx->Extensions.Count,

+                  (int) Elements(default_extensions));

+

+   return ctx->Extensions.Count;

+}

+

+

+/**

+ * Return name of i-th enabled extension

+ */

+const GLubyte *

+_mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)

+{

+   GLuint i;

+

+   for (i = 0; i < Elements(default_extensions); i++) {

+      if (extension_enabled(ctx, i)) {

+         if (index == 0)

+            return (const GLubyte *) default_extensions[i].name;

+         index--;

+      }

+   }

+

+   return NULL;

+}