diff options
Diffstat (limited to 'mesalib/src/mesa/main/extensions.c')
| -rw-r--r-- | mesalib/src/mesa/main/extensions.c | 2002 |
1 files changed, 1002 insertions, 1000 deletions
diff --git a/mesalib/src/mesa/main/extensions.c b/mesalib/src/mesa/main/extensions.c index d31477731..1062cde9e 100644 --- a/mesalib/src/mesa/main/extensions.c +++ b/mesalib/src/mesa/main/extensions.c @@ -1,1000 +1,1002 @@ -/*
- * 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_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_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_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_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; +} |