extensions.c revision d63b28c1
1/* 2 * Mesa 3-D graphics library 3 * 4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. 5 * Copyright (C) 2009 VMware, Inc. All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 26 27/** 28 * \file 29 * \brief Extension handling 30 */ 31 32 33#include "glheader.h" 34#include "imports.h" 35#include "context.h" 36#include "extensions.h" 37#include "macros.h" 38#include "mtypes.h" 39 40struct gl_extensions _mesa_extension_override_enables; 41struct gl_extensions _mesa_extension_override_disables; 42static char *extra_extensions = NULL; 43static char *cant_disable_extensions = NULL; 44 45enum { 46 DISABLE = 0, 47 GLL = 1 << API_OPENGL_COMPAT, /* GL Legacy / Compatibility */ 48 GLC = 1 << API_OPENGL_CORE, /* GL Core */ 49 GL = (1 << API_OPENGL_COMPAT) | (1 << API_OPENGL_CORE), 50 ES1 = 1 << API_OPENGLES, 51 ES2 = 1 << API_OPENGLES2, 52 ES3 = 1 << (API_OPENGL_LAST + 1), 53}; 54 55/** 56 * \brief An element of the \c extension_table. 57 */ 58struct extension { 59 /** Name of extension, such as "GL_ARB_depth_clamp". */ 60 const char *name; 61 62 /** Offset (in bytes) of the corresponding member in struct gl_extensions. */ 63 size_t offset; 64 65 /** Set of API's in which the extension exists, as a bitset. */ 66 uint8_t api_set; 67 68 /** Year the extension was proposed or approved. Used to sort the 69 * extension string chronologically. */ 70 uint16_t year; 71}; 72 73 74/** 75 * Given a member \c x of struct gl_extensions, return offset of 76 * \c x in bytes. 77 */ 78#define o(x) offsetof(struct gl_extensions, x) 79 80 81/** 82 * \brief Table of supported OpenGL extensions for all API's. 83 */ 84static const struct extension extension_table[] = { 85 /* ARB Extensions */ 86 { "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility), GL, 2009 }, 87 { "GL_ARB_ES3_compatibility", o(ARB_ES3_compatibility), GL, 2012 }, 88 { "GL_ARB_arrays_of_arrays", o(ARB_arrays_of_arrays), GL, 2012 }, 89 { "GL_ARB_base_instance", o(ARB_base_instance), GL, 2011 }, 90 { "GL_ARB_blend_func_extended", o(ARB_blend_func_extended), GL, 2009 }, 91 { "GL_ARB_buffer_storage", o(ARB_buffer_storage), GL, 2013 }, 92 { "GL_ARB_clear_buffer_object", o(dummy_true), GL, 2012 }, 93 { "GL_ARB_clear_texture", o(ARB_clear_texture), GL, 2013 }, 94 { "GL_ARB_color_buffer_float", o(ARB_color_buffer_float), GL, 2004 }, 95 { "GL_ARB_compressed_texture_pixel_storage", o(dummy_true), GL, 2011 }, 96 { "GL_ARB_compute_shader", o(ARB_compute_shader), GL, 2012 }, 97 { "GL_ARB_conditional_render_inverted", o(ARB_conditional_render_inverted), GL, 2014 }, 98 { "GL_ARB_copy_buffer", o(dummy_true), GL, 2008 }, 99 { "GL_ARB_copy_image", o(ARB_copy_image), GL, 2012 }, 100 { "GL_ARB_conservative_depth", o(ARB_conservative_depth), GL, 2011 }, 101 { "GL_ARB_debug_output", o(dummy_true), GL, 2009 }, 102 { "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float), GL, 2008 }, 103 { "GL_ARB_depth_clamp", o(ARB_depth_clamp), GL, 2003 }, 104 { "GL_ARB_depth_texture", o(ARB_depth_texture), GLL, 2001 }, 105 { "GL_ARB_derivative_control", o(ARB_derivative_control), GL, 2014 }, 106 { "GL_ARB_draw_buffers", o(dummy_true), GL, 2002 }, 107 { "GL_ARB_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 }, 108 { "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex), GL, 2009 }, 109 { "GL_ARB_draw_indirect", o(ARB_draw_indirect), GLC, 2010 }, 110 { "GL_ARB_draw_instanced", o(ARB_draw_instanced), GL, 2008 }, 111 { "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location), GL, 2009 }, 112 { "GL_ARB_explicit_uniform_location", o(ARB_explicit_uniform_location), GL, 2012 }, 113 { "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions), GL, 2009 }, 114 { "GL_ARB_fragment_layer_viewport", o(ARB_fragment_layer_viewport), GLC, 2012 }, 115 { "GL_ARB_fragment_program", o(ARB_fragment_program), GLL, 2002 }, 116 { "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow), GLL, 2003 }, 117 { "GL_ARB_fragment_shader", o(ARB_fragment_shader), GL, 2002 }, 118 { "GL_ARB_framebuffer_object", o(ARB_framebuffer_object), GL, 2005 }, 119 { "GL_ARB_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 }, 120 { "GL_ARB_get_program_binary", o(dummy_true), GL, 2010 }, 121 { "GL_ARB_gpu_shader5", o(ARB_gpu_shader5), GLC, 2010 }, 122 { "GL_ARB_half_float_pixel", o(dummy_true), GL, 2003 }, 123 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL, 2008 }, 124 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL, 2008 }, 125 { "GL_ARB_internalformat_query", o(ARB_internalformat_query), GL, 2011 }, 126 { "GL_ARB_invalidate_subdata", o(dummy_true), GL, 2012 }, 127 { "GL_ARB_map_buffer_alignment", o(dummy_true), GL, 2011 }, 128 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL, 2008 }, 129 { "GL_ARB_multi_bind", o(dummy_true), GL, 2013 }, 130 { "GL_ARB_multi_draw_indirect", o(ARB_draw_indirect), GLC, 2012 }, 131 { "GL_ARB_multisample", o(dummy_true), GLL, 1994 }, 132 { "GL_ARB_multitexture", o(dummy_true), GLL, 1998 }, 133 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL, 2003 }, 134 { "GL_ARB_occlusion_query", o(ARB_occlusion_query), GLL, 2001 }, 135 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 }, 136 { "GL_ARB_point_parameters", o(EXT_point_parameters), GLL, 1997 }, 137 { "GL_ARB_point_sprite", o(ARB_point_sprite), GL, 2003 }, 138 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 }, 139 { "GL_ARB_robustness", o(dummy_true), GL, 2010 }, 140 { "GL_ARB_sample_shading", o(ARB_sample_shading), GL, 2009 }, 141 { "GL_ARB_sampler_objects", o(dummy_true), GL, 2009 }, 142 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL, 2009 }, 143 { "GL_ARB_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture), GL, 2013 }, 144 { "GL_ARB_separate_shader_objects", o(dummy_true), GL, 2010 }, 145 { "GL_ARB_shader_atomic_counters", o(ARB_shader_atomic_counters), GL, 2011 }, 146 { "GL_ARB_shader_bit_encoding", o(ARB_shader_bit_encoding), GL, 2010 }, 147 { "GL_ARB_shader_image_load_store", o(ARB_shader_image_load_store), GL, 2011 }, 148 { "GL_ARB_shader_objects", o(dummy_true), GL, 2002 }, 149 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 }, 150 { "GL_ARB_shader_texture_lod", o(ARB_shader_texture_lod), GL, 2009 }, 151 { "GL_ARB_shading_language_100", o(dummy_true), GLL, 2003 }, 152 { "GL_ARB_shading_language_packing", o(ARB_shading_language_packing), GL, 2011 }, 153 { "GL_ARB_shading_language_420pack", o(ARB_shading_language_420pack), GL, 2011 }, 154 { "GL_ARB_shadow", o(ARB_shadow), GLL, 2001 }, 155 { "GL_ARB_stencil_texturing", o(ARB_stencil_texturing), GL, 2012 }, 156 { "GL_ARB_sync", o(ARB_sync), GL, 2003 }, 157 { "GL_ARB_texture_barrier", o(NV_texture_barrier), GL, 2014 }, 158 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 2000 }, 159 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GLC, 2008 }, 160 { "GL_ARB_texture_buffer_object_rgb32", o(ARB_texture_buffer_object_rgb32), GLC, 2009 }, 161 { "GL_ARB_texture_buffer_range", o(ARB_texture_buffer_range), GLC, 2012 }, 162 { "GL_ARB_texture_compression", o(dummy_true), GLL, 2000 }, 163 { "GL_ARB_texture_compression_bptc", o(ARB_texture_compression_bptc), GL, 2010 }, 164 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 }, 165 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GLL, 1999 }, 166 { "GL_ARB_texture_cube_map_array", o(ARB_texture_cube_map_array), GL, 2009 }, 167 { "GL_ARB_texture_env_add", o(dummy_true), GLL, 1999 }, 168 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GLL, 2001 }, 169 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GLL, 2001 }, 170 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GLL, 2001 }, 171 { "GL_ARB_texture_float", o(ARB_texture_float), GL, 2004 }, 172 { "GL_ARB_texture_gather", o(ARB_texture_gather), GL, 2009 }, 173 { "GL_ARB_texture_mirrored_repeat", o(dummy_true), GLL, 2001 }, 174 { "GL_ARB_texture_mirror_clamp_to_edge", o(ARB_texture_mirror_clamp_to_edge), GL, 2013 }, 175 { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL, 2009 }, 176 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL, 2003 }, 177 { "GL_ARB_texture_query_levels", o(ARB_texture_query_levels), GL, 2012 }, 178 { "GL_ARB_texture_query_lod", o(ARB_texture_query_lod), GL, 2009 }, 179 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL, 2004 }, 180 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL, 2009 }, 181 { "GL_ARB_texture_rg", o(ARB_texture_rg), GL, 2008 }, 182 { "GL_ARB_texture_storage", o(dummy_true), GL, 2011 }, 183 { "GL_ARB_texture_storage_multisample", o(ARB_texture_multisample), GL, 2012 }, 184 { "GL_ARB_texture_view", o(ARB_texture_view), GL, 2012 }, 185 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 }, 186 { "GL_ARB_timer_query", o(ARB_timer_query), GL, 2010 }, 187 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL, 2010 }, 188 { "GL_ARB_transform_feedback3", o(ARB_transform_feedback3), GL, 2010 }, 189 { "GL_ARB_transform_feedback_instanced", o(ARB_transform_feedback_instanced), GL, 2011 }, 190 { "GL_ARB_transpose_matrix", o(dummy_true), GLL, 1999 }, 191 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL, 2009 }, 192 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 }, 193 { "GL_ARB_vertex_array_object", o(dummy_true), GL, 2006 }, 194 { "GL_ARB_vertex_attrib_binding", o(dummy_true), GL, 2012 }, 195 { "GL_ARB_vertex_buffer_object", o(dummy_true), GLL, 2003 }, 196 { "GL_ARB_vertex_program", o(ARB_vertex_program), GLL, 2002 }, 197 { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL, 2002 }, 198 { "GL_ARB_vertex_type_10f_11f_11f_rev", o(ARB_vertex_type_10f_11f_11f_rev), GL, 2013 }, 199 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL, 2009 }, 200 { "GL_ARB_viewport_array", o(ARB_viewport_array), GLC, 2010 }, 201 { "GL_ARB_window_pos", o(dummy_true), GLL, 2001 }, 202 /* EXT extensions */ 203 { "GL_EXT_abgr", o(dummy_true), GL, 1995 }, 204 { "GL_EXT_bgra", o(dummy_true), GLL, 1995 }, 205 { "GL_EXT_blend_color", o(EXT_blend_color), GLL, 1995 }, 206 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 }, 207 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 }, 208 { "GL_EXT_discard_framebuffer", o(dummy_true), ES1 | ES2, 2009 }, 209 { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GLL | ES1 | ES2, 1995 }, 210 { "GL_EXT_blend_subtract", o(dummy_true), GLL, 1995 }, 211 { "GL_EXT_compiled_vertex_array", o(dummy_true), GLL, 1996 }, 212 { "GL_EXT_copy_texture", o(dummy_true), GLL, 1995 }, 213 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL, 2002 }, 214 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL, 2006 }, 215 { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL, 2006 }, 216 { "GL_EXT_draw_range_elements", o(dummy_true), GLL, 1997 }, 217 { "GL_EXT_fog_coord", o(dummy_true), GLL, 1999 }, 218 { "GL_EXT_framebuffer_blit", o(dummy_true), GL, 2005 }, 219 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL, 2005 }, 220 { "GL_EXT_framebuffer_multisample_blit_scaled", o(EXT_framebuffer_multisample_blit_scaled), GL, 2011 }, 221 { "GL_EXT_framebuffer_object", o(dummy_true), GLL, 2000 }, 222 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 }, 223 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GLL, 2006 }, 224 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL, 2006 }, 225 { "GL_EXT_map_buffer_range", o(ARB_map_buffer_range), ES1 | ES2, 2012 }, 226 { "GL_EXT_multi_draw_arrays", o(dummy_true), GLL | ES1 | ES2, 1999 }, 227 { "GL_EXT_packed_depth_stencil", o(dummy_true), GL, 2005 }, 228 { "GL_EXT_packed_float", o(EXT_packed_float), GL, 2004 }, 229 { "GL_EXT_packed_pixels", o(dummy_true), GLL, 1997 }, 230 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 }, 231 { "GL_EXT_point_parameters", o(EXT_point_parameters), GLL, 1997 }, 232 { "GL_EXT_polygon_offset", o(dummy_true), GLL, 1995 }, 233 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 }, 234 { "GL_EXT_rescale_normal", o(dummy_true), GLL, 1997 }, 235 { "GL_EXT_secondary_color", o(dummy_true), GLL, 1999 }, 236 { "GL_EXT_separate_shader_objects", o(dummy_true), ES2, 2013 }, 237 { "GL_EXT_separate_specular_color", o(dummy_true), GLL, 1997 }, 238 { "GL_EXT_shader_integer_mix", o(EXT_shader_integer_mix), GL | ES3, 2013 }, 239 { "GL_EXT_shadow_funcs", o(ARB_shadow), GLL, 2002 }, 240 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GLL, 2001 }, 241 { "GL_EXT_stencil_wrap", o(dummy_true), GLL, 2002 }, 242 { "GL_EXT_subtexture", o(dummy_true), GLL, 1995 }, 243 { "GL_EXT_texture3D", o(EXT_texture3D), GLL, 1996 }, 244 { "GL_EXT_texture_array", o(EXT_texture_array), GL, 2006 }, 245 { "GL_EXT_texture_compression_dxt1", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2004 }, 246 { "GL_ANGLE_texture_compression_dxt3", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2011 }, 247 { "GL_ANGLE_texture_compression_dxt5", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2011 }, 248 { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc), GL, 2006 }, 249 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 }, 250 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL, 2000 }, 251 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GLL, 2001 }, 252 { "GL_EXT_texture_edge_clamp", o(dummy_true), GLL, 1997 }, 253 { "GL_EXT_texture_env_add", o(dummy_true), GLL, 1999 }, 254 { "GL_EXT_texture_env_combine", o(dummy_true), GLL, 2000 }, 255 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GLL, 2000 }, 256 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2, 1999 }, 257 { "GL_EXT_texture_format_BGRA8888", o(dummy_true), ES1 | ES2, 2005 }, 258 { "GL_EXT_texture_rg", o(ARB_texture_rg), ES2, 2011 }, 259 { "GL_EXT_read_format_bgra", o(dummy_true), ES1 | ES2, 2009 }, 260 { "GL_EXT_texture_integer", o(EXT_texture_integer), GL, 2006 }, 261 { "GL_EXT_texture_lod_bias", o(dummy_true), GLL | ES1, 1999 }, 262 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL, 2004 }, 263 { "GL_EXT_texture_object", o(dummy_true), GLL, 1995 }, 264 { "GL_EXT_texture", o(dummy_true), GLL, 1996 }, 265 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GLL, 2004 }, 266 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL, 2004 }, 267 { "GL_EXT_texture_snorm", o(EXT_texture_snorm), GL, 2009 }, 268 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL, 2004 }, 269 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode), GL, 2006 }, 270 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 }, 271 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2, 2008 }, 272 { "GL_EXT_timer_query", o(EXT_timer_query), GL, 2006 }, 273 { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL, 2011 }, 274 { "GL_EXT_unpack_subimage", o(dummy_true), ES2, 2011 }, 275 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 }, 276 { "GL_EXT_vertex_array", o(dummy_true), GLL, 1995 }, 277 { "GL_EXT_color_buffer_float", o(dummy_true), ES3, 2013 }, 278 279 /* OES extensions */ 280 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1, 2009 }, 281 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1, 2009 }, 282 { "GL_OES_blend_subtract", o(dummy_true), ES1, 2009 }, 283 { "GL_OES_byte_coordinates", o(dummy_true), ES1, 2002 }, 284 { "GL_OES_compressed_ETC1_RGB8_texture", o(OES_compressed_ETC1_RGB8_texture), ES1 | ES2, 2005 }, 285 { "GL_OES_compressed_paletted_texture", o(dummy_true), ES1, 2003 }, 286 { "GL_OES_depth24", o(dummy_true), ES1 | ES2, 2005 }, 287 { "GL_OES_depth32", o(dummy_false), DISABLE, 2005 }, 288 { "GL_OES_depth_texture", o(ARB_depth_texture), ES2, 2006 }, 289 { "GL_OES_depth_texture_cube_map", o(OES_depth_texture_cube_map), ES2, 2012 }, 290 { "GL_OES_draw_texture", o(OES_draw_texture), ES1, 2004 }, 291 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */ 292 { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2, 2006 }, 293 { "GL_OES_EGL_image_external", o(OES_EGL_image_external), ES1 | ES2, 2010 }, 294 { "GL_OES_element_index_uint", o(dummy_true), ES1 | ES2, 2005 }, 295 { "GL_OES_fbo_render_mipmap", o(dummy_true), ES1 | ES2, 2005 }, 296 { "GL_OES_fixed_point", o(dummy_true), ES1, 2002 }, 297 { "GL_OES_framebuffer_object", o(dummy_true), ES1, 2005 }, 298 { "GL_OES_get_program_binary", o(dummy_true), ES2, 2008 }, 299 { "GL_OES_mapbuffer", o(dummy_true), ES1 | ES2, 2005 }, 300 { "GL_OES_packed_depth_stencil", o(dummy_true), ES1 | ES2, 2007 }, 301 { "GL_OES_point_size_array", o(dummy_true), ES1, 2004 }, 302 { "GL_OES_point_sprite", o(ARB_point_sprite), ES1, 2004 }, 303 { "GL_OES_query_matrix", o(dummy_true), ES1, 2003 }, 304 { "GL_OES_read_format", o(dummy_true), GL | ES1, 2003 }, 305 { "GL_OES_rgb8_rgba8", o(dummy_true), ES1 | ES2, 2005 }, 306 { "GL_OES_single_precision", o(dummy_true), ES1, 2003 }, 307 { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2, 2005 }, 308 { "GL_OES_stencil1", o(dummy_false), DISABLE, 2005 }, 309 { "GL_OES_stencil4", o(dummy_false), DISABLE, 2005 }, 310 { "GL_OES_stencil8", o(dummy_true), ES1 | ES2, 2005 }, 311 { "GL_OES_stencil_wrap", o(dummy_true), ES1, 2002 }, 312 { "GL_OES_surfaceless_context", o(dummy_true), ES1 | ES2, 2012 }, 313 { "GL_OES_texture_3D", o(EXT_texture3D), ES2, 2005 }, 314 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1, 2007 }, 315 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1, 2005 }, 316 { "GL_OES_texture_mirrored_repeat", o(dummy_true), ES1, 2005 }, 317 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES1 | ES2, 2005 }, 318 { "GL_OES_vertex_array_object", o(dummy_true), ES1 | ES2, 2010 }, 319 320 /* KHR extensions */ 321 { "GL_KHR_debug", o(dummy_true), GL, 2012 }, 322 323 /* Vendor extensions */ 324 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL, 1999 }, 325 { "GL_AMD_conservative_depth", o(ARB_conservative_depth), GL, 2009 }, 326 { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 }, 327 { "GL_AMD_performance_monitor", o(AMD_performance_monitor), GL, 2007 }, 328 { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture), GL, 2009 }, 329 { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 }, 330 { "GL_AMD_shader_trinary_minmax", o(dummy_true), GL, 2012 }, 331 { "GL_AMD_vertex_shader_layer", o(AMD_vertex_shader_layer), GLC, 2012 }, 332 { "GL_AMD_vertex_shader_viewport_index", o(AMD_vertex_shader_viewport_index), GLC, 2012 }, 333 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL, 2006 }, 334 { "GL_APPLE_packed_pixels", o(dummy_true), GLL, 2002 }, 335 { "GL_APPLE_texture_max_level", o(dummy_true), ES1 | ES2, 2009 }, 336 { "GL_APPLE_vertex_array_object", o(dummy_true), GLL, 2002 }, 337 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 }, 338 { "GL_ATI_draw_buffers", o(dummy_true), GLL, 2002 }, 339 { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GLL, 2001 }, 340 { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GLL, 2006 }, 341 { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc), GL, 2004 }, 342 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GLL, 2002 }, 343 { "GL_ATI_texture_float", o(ARB_texture_float), GL, 2002 }, 344 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL, 2006 }, 345 { "GL_IBM_multimode_draw_arrays", o(dummy_true), GL, 1998 }, 346 { "GL_IBM_rasterpos_clip", o(dummy_true), GLL, 1996 }, 347 { "GL_IBM_texture_mirrored_repeat", o(dummy_true), GLL, 1998 }, 348 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 }, 349 { "GL_INTEL_performance_query", o(INTEL_performance_query), GL | ES2, 2013 }, 350 { "GL_MESA_pack_invert", o(MESA_pack_invert), GL, 2002 }, 351 { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm), GL, 2009 }, 352 { "GL_MESA_window_pos", o(dummy_true), GLL, 2000 }, 353 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL, 2002 }, 354 { "GL_NV_blend_square", o(dummy_true), GLL, 1999 }, 355 { "GL_NV_conditional_render", o(NV_conditional_render), GL, 2008 }, 356 { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL, 2001 }, 357 { "GL_NV_draw_buffers", o(dummy_true), ES2, 2011 }, 358 { "GL_NV_fbo_color_attachments", o(dummy_true), ES2, 2010 }, 359 { "GL_NV_fog_distance", o(NV_fog_distance), GLL, 2001 }, 360 { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GLL, 2005 }, 361 { "GL_NV_light_max_exponent", o(dummy_true), GLL, 1999 }, 362 { "GL_NV_packed_depth_stencil", o(dummy_true), GL, 2000 }, 363 { "GL_NV_point_sprite", o(NV_point_sprite), GL, 2001 }, 364 { "GL_NV_primitive_restart", o(NV_primitive_restart), GLL, 2002 }, 365 { "GL_NV_read_buffer", o(dummy_true), ES2, 2011 }, 366 { "GL_NV_texgen_reflection", o(dummy_true), GLL, 1999 }, 367 { "GL_NV_texture_barrier", o(NV_texture_barrier), GL, 2009 }, 368 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GLL, 1999 }, 369 { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GLL, 2000 }, 370 { "GL_NV_vdpau_interop", o(NV_vdpau_interop), GL, 2010 }, 371 { "GL_S3_s3tc", o(ANGLE_texture_compression_dxt), GL, 1999 }, 372 { "GL_SGIS_generate_mipmap", o(dummy_true), GLL, 1997 }, 373 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 1997 }, 374 { "GL_SGIS_texture_edge_clamp", o(dummy_true), GLL, 1997 }, 375 { "GL_SGIS_texture_lod", o(dummy_true), GLL, 1997 }, 376 { "GL_SUN_multi_draw_arrays", o(dummy_true), GLL, 1999 }, 377 378 { 0, 0, 0, 0 }, 379}; 380 381 382/** 383 * Given an extension name, lookup up the corresponding member of struct 384 * gl_extensions and return that member's offset (in bytes). If the name is 385 * not found in the \c extension_table, return 0. 386 * 387 * \param name Name of extension. 388 * \return Offset of member in struct gl_extensions. 389 */ 390static size_t 391name_to_offset(const char* name) 392{ 393 const struct extension *i; 394 395 if (name == 0) 396 return 0; 397 398 for (i = extension_table; i->name != 0; ++i) { 399 if (strcmp(name, i->name) == 0) 400 return i->offset; 401 } 402 403 return 0; 404} 405 406/** 407 * Overrides extensions in \c ctx based on the values in 408 * _mesa_extension_override_enables and _mesa_extension_override_disables. 409 */ 410static void 411override_extensions_in_context(struct gl_context *ctx) 412{ 413 const struct extension *i; 414 const GLboolean *enables = 415 (GLboolean*) &_mesa_extension_override_enables; 416 const GLboolean *disables = 417 (GLboolean*) &_mesa_extension_override_disables; 418 GLboolean *ctx_ext = (GLboolean*)&ctx->Extensions; 419 420 for (i = extension_table; i->name != 0; ++i) { 421 size_t offset = i->offset; 422 assert(!enables[offset] || !disables[offset]); 423 if (enables[offset]) { 424 ctx_ext[offset] = 1; 425 } else if (disables[offset]) { 426 ctx_ext[offset] = 0; 427 } 428 } 429} 430 431 432/** 433 * Enable all extensions suitable for a software-only renderer. 434 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc. 435 */ 436void 437_mesa_enable_sw_extensions(struct gl_context *ctx) 438{ 439 ctx->Extensions.ARB_depth_clamp = GL_TRUE; 440 ctx->Extensions.ARB_depth_texture = GL_TRUE; 441 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE; 442 ctx->Extensions.ARB_draw_instanced = GL_TRUE; 443 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE; 444 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE; 445 ctx->Extensions.ARB_fragment_program = GL_TRUE; 446 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE; 447 ctx->Extensions.ARB_fragment_shader = GL_TRUE; 448 ctx->Extensions.ARB_framebuffer_object = GL_TRUE; 449 ctx->Extensions.ARB_half_float_vertex = GL_TRUE; 450 ctx->Extensions.ARB_map_buffer_range = GL_TRUE; 451 ctx->Extensions.ARB_occlusion_query = GL_TRUE; 452 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE; 453 ctx->Extensions.ARB_point_sprite = GL_TRUE; 454 ctx->Extensions.ARB_shadow = GL_TRUE; 455 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; 456 ctx->Extensions.ARB_texture_compression_bptc = GL_TRUE; 457 ctx->Extensions.ARB_texture_cube_map = GL_TRUE; 458 ctx->Extensions.ARB_texture_env_combine = GL_TRUE; 459 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE; 460 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE; 461#ifdef TEXTURE_FLOAT_ENABLED 462 ctx->Extensions.ARB_texture_float = GL_TRUE; 463#endif 464 ctx->Extensions.ARB_texture_mirror_clamp_to_edge = GL_TRUE; 465 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE; 466 ctx->Extensions.ARB_texture_rg = GL_TRUE; 467 ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE; 468 ctx->Extensions.ARB_vertex_program = GL_TRUE; 469 ctx->Extensions.ARB_vertex_shader = GL_TRUE; 470 ctx->Extensions.ARB_sync = GL_TRUE; 471 ctx->Extensions.APPLE_object_purgeable = GL_TRUE; 472 ctx->Extensions.ATI_fragment_shader = GL_TRUE; 473 ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE; 474 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE; 475 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE; 476 ctx->Extensions.ATI_separate_stencil = GL_TRUE; 477 ctx->Extensions.EXT_blend_color = GL_TRUE; 478 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE; 479 ctx->Extensions.EXT_blend_func_separate = GL_TRUE; 480 ctx->Extensions.EXT_blend_minmax = GL_TRUE; 481 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE; 482 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE; 483 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE; 484 ctx->Extensions.EXT_point_parameters = GL_TRUE; 485 ctx->Extensions.EXT_provoking_vertex = GL_TRUE; 486 ctx->Extensions.EXT_stencil_two_side = GL_TRUE; 487 ctx->Extensions.EXT_texture_array = GL_TRUE; 488 ctx->Extensions.EXT_texture_compression_latc = GL_TRUE; 489 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE; 490 ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE; 491 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE; 492 ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE; 493 ctx->Extensions.EXT_texture_sRGB = GL_TRUE; 494 ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE; 495 ctx->Extensions.EXT_texture_swizzle = GL_TRUE; 496 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/ 497 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE; 498 ctx->Extensions.MESA_pack_invert = GL_TRUE; 499 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE; 500 ctx->Extensions.NV_conditional_render = GL_TRUE; 501 ctx->Extensions.NV_point_sprite = GL_TRUE; 502 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE; 503 ctx->Extensions.NV_texture_rectangle = GL_TRUE; 504 ctx->Extensions.NV_fragment_program_option = GL_TRUE; 505 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE; 506 ctx->Extensions.OES_standard_derivatives = GL_TRUE; 507 ctx->Extensions.TDFX_texture_compression_FXT1 = GL_TRUE; 508 if (ctx->Mesa_DXTn) { 509 ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE; 510 ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE; 511 } 512} 513 514/** 515 * Either enable or disable the named extension. 516 * \return offset of extensions withint `ext' or 0 if extension is not known 517 */ 518static size_t 519set_extension(struct gl_extensions *ext, const char *name, GLboolean state) 520{ 521 size_t offset; 522 523 offset = name_to_offset(name); 524 if (offset != 0 && (offset != o(dummy_true) || state != GL_FALSE)) { 525 ((GLboolean *) ext)[offset] = state; 526 } 527 528 return offset; 529} 530 531/** 532 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable. 533 * 534 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to 535 * enable or disable. The list is processed thus: 536 * - Enable recognized extension names that are prefixed with '+'. 537 * - Disable recognized extension names that are prefixed with '-'. 538 * - Enable recognized extension names that are not prefixed. 539 * - Collect unrecognized extension names in a new string. 540 * 541 * \c MESA_EXTENSION_OVERRIDE was previously parsed during 542 * _mesa_one_time_init_extension_overrides. We just use the results of that 543 * parsing in this function. 544 * 545 * \return Space-separated list of unrecognized extension names (which must 546 * be freed). Does not return \c NULL. 547 */ 548static char * 549get_extension_override( struct gl_context *ctx ) 550{ 551 override_extensions_in_context(ctx); 552 553 if (cant_disable_extensions != NULL) { 554 _mesa_problem(ctx, 555 "Trying to disable permanently enabled extensions: %s", 556 cant_disable_extensions); 557 } 558 559 if (extra_extensions == NULL) { 560 return calloc(1, sizeof(char)); 561 } else { 562 _mesa_problem(ctx, "Trying to enable unknown extensions: %s", 563 extra_extensions); 564 return strdup(extra_extensions); 565 } 566} 567 568 569/** 570 * \brief Free extra_extensions and cant_disable_extensions strings 571 * 572 * These strings are allocated early during the first context creation by 573 * _mesa_one_time_init_extension_overrides. 574 */ 575static void __attribute__((__destructor__)) 576free_unknown_extensions_strings(void) 577{ 578 free(extra_extensions); 579 free(cant_disable_extensions); 580} 581 582 583/** 584 * \brief Initialize extension override tables. 585 * 586 * This should be called one time early during first context initialization. 587 */ 588void 589_mesa_one_time_init_extension_overrides(void) 590{ 591 const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE"); 592 char *env; 593 char *ext; 594 int len; 595 size_t offset; 596 597 /* atexit(free_unknown_extensions_strings); */ 598 599 memset(&_mesa_extension_override_enables, 0, sizeof(struct gl_extensions)); 600 memset(&_mesa_extension_override_disables, 0, sizeof(struct gl_extensions)); 601 602 if (env_const == NULL) { 603 return; 604 } 605 606 /* extra_exts: List of unrecognized extensions. */ 607 extra_extensions = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char)); 608 cant_disable_extensions = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char)); 609 610 /* Copy env_const because strtok() is destructive. */ 611 env = strdup(env_const); 612 for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) { 613 int enable; 614 bool recognized; 615 switch (ext[0]) { 616 case '+': 617 enable = 1; 618 ++ext; 619 break; 620 case '-': 621 enable = 0; 622 ++ext; 623 break; 624 default: 625 enable = 1; 626 break; 627 } 628 629 offset = set_extension(&_mesa_extension_override_enables, ext, enable); 630 if (offset != 0 && (offset != o(dummy_true) || enable != GL_FALSE)) { 631 ((GLboolean *) &_mesa_extension_override_disables)[offset] = !enable; 632 recognized = true; 633 } else { 634 recognized = false; 635 } 636 637 if (!recognized) { 638 if (enable) { 639 strcat(extra_extensions, ext); 640 strcat(extra_extensions, " "); 641 } else if (offset == o(dummy_true)) { 642 strcat(cant_disable_extensions, ext); 643 strcat(cant_disable_extensions, " "); 644 } 645 } 646 } 647 648 free(env); 649 650 /* Remove trailing space, and free if unused. */ 651 len = strlen(extra_extensions); 652 if (len == 0) { 653 free(extra_extensions); 654 extra_extensions = NULL; 655 } else if (extra_extensions[len - 1] == ' ') { 656 extra_extensions[len - 1] = '\0'; 657 } 658 len = strlen(cant_disable_extensions); 659 if (len == 0) { 660 free(cant_disable_extensions); 661 cant_disable_extensions = NULL; 662 } else if (cant_disable_extensions[len - 1] == ' ') { 663 cant_disable_extensions[len - 1] = '\0'; 664 } 665} 666 667 668/** 669 * \brief Initialize extension tables and enable default extensions. 670 * 671 * This should be called during context initialization. 672 * Note: Sets gl_extensions.dummy_true to true. 673 */ 674void 675_mesa_init_extensions(struct gl_extensions *extensions) 676{ 677 GLboolean *base = (GLboolean *) extensions; 678 GLboolean *sentinel = base + o(extension_sentinel); 679 GLboolean *i; 680 681 /* First, turn all extensions off. */ 682 for (i = base; i != sentinel; ++i) 683 *i = GL_FALSE; 684 685 /* Then, selectively turn default extensions on. */ 686 extensions->dummy_true = GL_TRUE; 687 extensions->EXT_texture3D = GL_TRUE; 688} 689 690 691typedef unsigned short extension_index; 692 693 694/** 695 * Compare two entries of the extensions table. Sorts first by year, 696 * then by name. 697 * 698 * Arguments are indices into extension_table. 699 */ 700static int 701extension_compare(const void *p1, const void *p2) 702{ 703 extension_index i1 = * (const extension_index *) p1; 704 extension_index i2 = * (const extension_index *) p2; 705 const struct extension *e1 = &extension_table[i1]; 706 const struct extension *e2 = &extension_table[i2]; 707 int res; 708 709 res = (int)e1->year - (int)e2->year; 710 711 if (res == 0) { 712 res = strcmp(e1->name, e2->name); 713 } 714 715 return res; 716} 717 718 719/** 720 * Construct the GL_EXTENSIONS string. Called the first time that 721 * glGetString(GL_EXTENSIONS) is called. 722 */ 723GLubyte* 724_mesa_make_extension_string(struct gl_context *ctx) 725{ 726 /* The extension string. */ 727 char *exts = 0; 728 /* Length of extension string. */ 729 size_t length = 0; 730 /* Number of extensions */ 731 unsigned count; 732 /* Indices of the extensions sorted by year */ 733 extension_index *extension_indices; 734 /* String of extra extensions. */ 735 char *extra_extensions = get_extension_override(ctx); 736 GLboolean *base = (GLboolean *) &ctx->Extensions; 737 const struct extension *i; 738 unsigned j; 739 unsigned maxYear = ~0; 740 unsigned api_set = (1 << ctx->API); 741 if (_mesa_is_gles3(ctx)) 742 api_set |= ES3; 743 744 /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */ 745 { 746 const char *env = getenv("MESA_EXTENSION_MAX_YEAR"); 747 if (env) { 748 maxYear = atoi(env); 749 _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n", 750 maxYear); 751 } 752 } 753 754 /* Compute length of the extension string. */ 755 count = 0; 756 for (i = extension_table; i->name != 0; ++i) { 757 if (base[i->offset] && 758 i->year <= maxYear && 759 (i->api_set & api_set)) { 760 length += strlen(i->name) + 1; /* +1 for space */ 761 ++count; 762 } 763 } 764 if (extra_extensions != NULL) 765 length += 1 + strlen(extra_extensions); /* +1 for space */ 766 767 exts = calloc(ALIGN(length + 1, 4), sizeof(char)); 768 if (exts == NULL) { 769 free(extra_extensions); 770 return NULL; 771 } 772 773 extension_indices = malloc(count * sizeof(extension_index)); 774 if (extension_indices == NULL) { 775 free(exts); 776 free(extra_extensions); 777 return NULL; 778 } 779 780 /* Sort extensions in chronological order because certain old applications 781 * (e.g., Quake3 demo) store the extension list in a static size buffer so 782 * chronologically order ensure that the extensions that such applications 783 * expect will fit into that buffer. 784 */ 785 j = 0; 786 for (i = extension_table; i->name != 0; ++i) { 787 if (base[i->offset] && 788 i->year <= maxYear && 789 (i->api_set & api_set)) { 790 extension_indices[j++] = i - extension_table; 791 } 792 } 793 assert(j == count); 794 qsort(extension_indices, count, 795 sizeof *extension_indices, extension_compare); 796 797 /* Build the extension string.*/ 798 for (j = 0; j < count; ++j) { 799 i = &extension_table[extension_indices[j]]; 800 assert(base[i->offset] && (i->api_set & api_set)); 801 strcat(exts, i->name); 802 strcat(exts, " "); 803 } 804 free(extension_indices); 805 if (extra_extensions != 0) { 806 strcat(exts, extra_extensions); 807 free(extra_extensions); 808 } 809 810 return (GLubyte *) exts; 811} 812 813/** 814 * Return number of enabled extensions. 815 */ 816GLuint 817_mesa_get_extension_count(struct gl_context *ctx) 818{ 819 GLboolean *base; 820 const struct extension *i; 821 unsigned api_set = (1 << ctx->API); 822 if (_mesa_is_gles3(ctx)) 823 api_set |= ES3; 824 825 /* only count once */ 826 if (ctx->Extensions.Count != 0) 827 return ctx->Extensions.Count; 828 829 base = (GLboolean *) &ctx->Extensions; 830 for (i = extension_table; i->name != 0; ++i) { 831 if (base[i->offset] && (i->api_set & api_set)) { 832 ctx->Extensions.Count++; 833 } 834 } 835 return ctx->Extensions.Count; 836} 837 838/** 839 * Return name of i-th enabled extension 840 */ 841const GLubyte * 842_mesa_get_enabled_extension(struct gl_context *ctx, GLuint index) 843{ 844 const GLboolean *base; 845 size_t n; 846 const struct extension *i; 847 unsigned api_set = (1 << ctx->API); 848 if (_mesa_is_gles3(ctx)) 849 api_set |= ES3; 850 851 base = (GLboolean*) &ctx->Extensions; 852 n = 0; 853 for (i = extension_table; i->name != 0; ++i) { 854 if (base[i->offset] && (i->api_set & api_set)) { 855 if (n == index) 856 return (const GLubyte*) i->name; 857 else 858 ++n; 859 } 860 } 861 862 return NULL; 863} 864