src/mesa/main/extensions.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 #include "glheader.h"
  28 #include "imports.h"
  29 #include "context.h"
  30 #include "extensions.h"
  31 #include "simple_list.h"
  32 #include "mtypes.h"
  33
  34
  35 #define F(x) offsetof(struct gl_extensions, x)
  36 #define ON GL_TRUE
  37 #define OFF GL_FALSE
  38
  39
  40 /*
  41  * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
  42  */
  43 static const struct {
  44    GLboolean enabled;
  45    const char *name;
  46    int flag_offset;
  47 } default_extensions[] = {
  48    { OFF, "GL_ARB_copy_buffer",                F(ARB_copy_buffer) },
  49    { OFF, "GL_ARB_depth_texture",              F(ARB_depth_texture) },
  50    { OFF, "GL_ARB_depth_clamp",                F(ARB_depth_clamp) },
  51    { ON,  "GL_ARB_draw_buffers",               F(ARB_draw_buffers) },
  52    { OFF, "GL_ARB_draw_elements_base_vertex",  F(ARB_draw_elements_base_vertex) },
  53    /* TODO: uncomment the following line once GLSL layout(...) support is implemented */
  54    /* { OFF, "GL_ARB_fragment_coord_conventions", F(ARB_fragment_coord_conventions) }, */
  55    { OFF, "GL_ARB_fragment_program",           F(ARB_fragment_program) },
  56    { OFF, "GL_ARB_fragment_program_shadow",    F(ARB_fragment_program_shadow) },
  57    { OFF, "GL_ARB_fragment_shader",            F(ARB_fragment_shader) },
  58    { OFF, "GL_ARB_framebuffer_object",         F(ARB_framebuffer_object) },
  59    { OFF, "GL_ARB_half_float_pixel",           F(ARB_half_float_pixel) },
  60    { OFF, "GL_ARB_half_float_vertex",          F(ARB_half_float_vertex) },
  61    { OFF, "GL_ARB_imaging",                    F(ARB_imaging) },
  62    { OFF, "GL_ARB_map_buffer_range",           F(ARB_map_buffer_range) },
  63    { ON,  "GL_ARB_multisample",                F(ARB_multisample) },
  64    { OFF, "GL_ARB_multitexture",               F(ARB_multitexture) },
  65    { OFF, "GL_ARB_occlusion_query",            F(ARB_occlusion_query) },
  66    { OFF, "GL_ARB_pixel_buffer_object",        F(EXT_pixel_buffer_object) },
  67    { OFF, "GL_ARB_point_parameters",           F(EXT_point_parameters) },
  68    { OFF, "GL_ARB_point_sprite",               F(ARB_point_sprite) },
  69    { OFF, "GL_ARB_provoking_vertex",           F(EXT_provoking_vertex) },
  70    { OFF, "GL_ARB_seamless_cube_map",          F(ARB_seamless_cube_map) },
  71    { OFF, "GL_ARB_shader_objects",             F(ARB_shader_objects) },
  72    { OFF, "GL_ARB_shading_language_100",       F(ARB_shading_language_100) },
  73    { OFF, "GL_ARB_shading_language_120",       F(ARB_shading_language_120) },
  74    { OFF, "GL_ARB_shadow",                     F(ARB_shadow) },
  75    { OFF, "GL_ARB_shadow_ambient",             F(ARB_shadow_ambient) },
  76    { OFF, "GL_ARB_sync",                       F(ARB_sync) },
  77    { OFF, "GL_ARB_texture_border_clamp",       F(ARB_texture_border_clamp) },
  78    { ON,  "GL_ARB_texture_compression",        F(ARB_texture_compression) },
  79    { OFF, "GL_ARB_texture_cube_map",           F(ARB_texture_cube_map) },
  80    { OFF, "GL_ARB_texture_env_add",            F(EXT_texture_env_add) },
  81    { OFF, "GL_ARB_texture_env_combine",        F(ARB_texture_env_combine) },
  82    { OFF, "GL_ARB_texture_env_crossbar",       F(ARB_texture_env_crossbar) },
  83    { OFF, "GL_ARB_texture_env_dot3",           F(ARB_texture_env_dot3) },
  84    { OFF, "GL_MESAX_texture_float",            F(ARB_texture_float) },
  85    { OFF, "GL_ARB_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
  86    { OFF, "GL_ARB_texture_non_power_of_two",   F(ARB_texture_non_power_of_two)},
  87    { OFF, "GL_ARB_texture_rectangle",          F(NV_texture_rectangle) },
  88    { ON,  "GL_ARB_transpose_matrix",           F(ARB_transpose_matrix) },
  89    { OFF, "GL_ARB_vertex_array_bgra",          F(EXT_vertex_array_bgra) },
  90    { OFF, "GL_ARB_vertex_array_object",        F(ARB_vertex_array_object) },
  91    { ON,  "GL_ARB_vertex_buffer_object",       F(ARB_vertex_buffer_object) },
  92    { OFF, "GL_ARB_vertex_program",             F(ARB_vertex_program) },
  93    { OFF, "GL_ARB_vertex_shader",              F(ARB_vertex_shader) },
  94    { ON,  "GL_ARB_window_pos",                 F(ARB_window_pos) },
  95    { ON,  "GL_EXT_abgr",                       F(EXT_abgr) },
  96    { ON,  "GL_EXT_bgra",                       F(EXT_bgra) },
  97    { OFF, "GL_EXT_blend_color",                F(EXT_blend_color) },
  98    { OFF, "GL_EXT_blend_equation_separate",    F(EXT_blend_equation_separate) },
  99    { OFF, "GL_EXT_blend_func_separate",        F(EXT_blend_func_separate) },
 100    { OFF, "GL_EXT_blend_logic_op",             F(EXT_blend_logic_op) },
 101    { OFF, "GL_EXT_blend_minmax",               F(EXT_blend_minmax) },
 102    { OFF, "GL_EXT_blend_subtract",             F(EXT_blend_subtract) },
 103    { OFF, "GL_EXT_clip_volume_hint",           F(EXT_clip_volume_hint) },
 104    { OFF, "GL_EXT_cull_vertex",                F(EXT_cull_vertex) },
 105    { ON,  "GL_EXT_compiled_vertex_array",      F(EXT_compiled_vertex_array) },
 106    { OFF, "GL_EXT_convolution",                F(EXT_convolution) },
 107    { ON,  "GL_EXT_copy_texture",               F(EXT_copy_texture) },
 108    { OFF, "GL_EXT_depth_bounds_test",          F(EXT_depth_bounds_test) },
 109    { OFF, "GL_EXT_draw_buffers2",              F(EXT_draw_buffers2) },
 110    { ON,  "GL_EXT_draw_range_elements",        F(EXT_draw_range_elements) },
 111    { OFF, "GL_EXT_framebuffer_blit",           F(EXT_framebuffer_blit) },
 112    { OFF, "GL_EXT_framebuffer_multisample",    F(EXT_framebuffer_multisample) },
 113    { OFF, "GL_EXT_framebuffer_object",         F(EXT_framebuffer_object) },
 114    { OFF, "GL_EXT_fog_coord",                  F(EXT_fog_coord) },
 115    { OFF, "GL_EXT_gpu_program_parameters",     F(EXT_gpu_program_parameters) },
 116    { OFF, "GL_EXT_histogram",                  F(EXT_histogram) },
 117    { ON,  "GL_EXT_multi_draw_arrays",          F(EXT_multi_draw_arrays) },
 118    { OFF, "GL_EXT_packed_depth_stencil",       F(EXT_packed_depth_stencil) },
 119    { ON,  "GL_EXT_packed_pixels",              F(EXT_packed_pixels) },
 120    { OFF, "GL_EXT_paletted_texture",           F(EXT_paletted_texture) },
 121    { OFF, "GL_EXT_pixel_buffer_object",        F(EXT_pixel_buffer_object) },
 122    { OFF, "GL_EXT_point_parameters",           F(EXT_point_parameters) },
 123    { ON,  "GL_EXT_polygon_offset",             F(EXT_polygon_offset) },
 124    { OFF, "GL_EXT_provoking_vertex",           F(EXT_provoking_vertex) },
 125    { ON,  "GL_EXT_rescale_normal",             F(EXT_rescale_normal) },
 126    { OFF, "GL_EXT_secondary_color",            F(EXT_secondary_color) },
 127    { ON,  "GL_EXT_separate_specular_color",    F(EXT_separate_specular_color) },
 128    { OFF, "GL_EXT_shadow_funcs",               F(EXT_shadow_funcs) },
 129    { OFF, "GL_EXT_shared_texture_palette",     F(EXT_shared_texture_palette) },
 130    { OFF, "GL_EXT_stencil_two_side",           F(EXT_stencil_two_side) },
 131    { OFF, "GL_EXT_stencil_wrap",               F(EXT_stencil_wrap) },
 132    { ON,  "GL_EXT_subtexture",                 F(EXT_subtexture) },
 133    { ON,  "GL_EXT_texture",                    F(EXT_texture) },
 134    { ON,  "GL_EXT_texture3D",                  F(EXT_texture3D) },
 135    { OFF, "GL_EXT_texture_compression_s3tc",   F(EXT_texture_compression_s3tc) },
 136    { OFF, "GL_EXT_texture_cube_map",           F(ARB_texture_cube_map) },
 137    { ON,  "GL_EXT_texture_edge_clamp",         F(SGIS_texture_edge_clamp) },
 138    { OFF, "GL_EXT_texture_env_add",            F(EXT_texture_env_add) },
 139    { OFF, "GL_EXT_texture_env_combine",        F(EXT_texture_env_combine) },
 140    { OFF, "GL_EXT_texture_env_dot3",           F(EXT_texture_env_dot3) },
 141    { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },
 142    { OFF, "GL_EXT_texture_lod_bias",           F(EXT_texture_lod_bias) },
 143    { OFF, "GL_EXT_texture_mirror_clamp",       F(EXT_texture_mirror_clamp) },
 144    { ON,  "GL_EXT_texture_object",             F(EXT_texture_object) },
 145    { OFF, "GL_EXT_texture_rectangle",          F(NV_texture_rectangle) },
 146    { OFF, "GL_EXT_texture_sRGB",               F(EXT_texture_sRGB) },
 147    { OFF, "GL_EXT_texture_swizzle",            F(EXT_texture_swizzle) },
 148    { OFF, "GL_EXT_timer_query",                F(EXT_timer_query) },
 149    { ON,  "GL_EXT_vertex_array",               F(EXT_vertex_array) },
 150    { OFF, "GL_EXT_vertex_array_bgra",          F(EXT_vertex_array_bgra) },
 151    { OFF, "GL_EXT_vertex_array_set",           F(EXT_vertex_array_set) },
 152    { OFF, "GL_3DFX_texture_compression_FXT1",  F(TDFX_texture_compression_FXT1) },
 153    { OFF, "GL_APPLE_client_storage",           F(APPLE_client_storage) },
 154    { ON,  "GL_APPLE_packed_pixels",            F(APPLE_packed_pixels) },
 155    { OFF, "GL_APPLE_vertex_array_object",      F(APPLE_vertex_array_object) },
 156    { OFF, "GL_ATI_blend_equation_separate",    F(EXT_blend_equation_separate) },
 157    { OFF, "GL_ATI_envmap_bumpmap",             F(ATI_envmap_bumpmap) },
 158    { OFF, "GL_ATI_texture_env_combine3",       F(ATI_texture_env_combine3)},
 159    { OFF, "GL_ATI_texture_mirror_once",        F(ATI_texture_mirror_once)},
 160    { OFF, "GL_ATI_fragment_shader",            F(ATI_fragment_shader)},
 161    { OFF, "GL_ATI_separate_stencil",           F(ATI_separate_stencil)},
 162    { ON,  "GL_IBM_multimode_draw_arrays",      F(IBM_multimode_draw_arrays) },
 163    { ON,  "GL_IBM_rasterpos_clip",             F(IBM_rasterpos_clip) },
 164    { OFF, "GL_IBM_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
 165    { OFF, "GL_INGR_blend_func_separate",       F(EXT_blend_func_separate) },
 166    { OFF, "GL_MESA_pack_invert",               F(MESA_pack_invert) },
 167    { OFF, "GL_MESA_packed_depth_stencil",      F(MESA_packed_depth_stencil) },
 168    { OFF, "GL_MESA_resize_buffers",            F(MESA_resize_buffers) },
 169    { OFF, "GL_MESA_texture_array",             F(MESA_texture_array) },
 170    { OFF, "GL_MESA_texture_signed_rgba",       F(MESA_texture_signed_rgba) },
 171    { OFF, "GL_MESA_ycbcr_texture",             F(MESA_ycbcr_texture) },
 172    { ON,  "GL_MESA_window_pos",                F(ARB_window_pos) },
 173    { OFF, "GL_NV_blend_square",                F(NV_blend_square) },
 174    { OFF, "GL_NV_conditional_render",          F(NV_conditional_render) },
 175    { OFF, "GL_NV_depth_clamp",                 F(ARB_depth_clamp) },
 176    { OFF, "GL_NV_fragment_program",            F(NV_fragment_program) },
 177    { OFF, "GL_NV_fragment_program_option",     F(NV_fragment_program_option) },
 178    { ON,  "GL_NV_light_max_exponent",          F(NV_light_max_exponent) },
 179    { OFF, "GL_NV_packed_depth_stencil",        F(EXT_packed_depth_stencil) },
 180    { OFF, "GL_NV_point_sprite",                F(NV_point_sprite) },
 181    { OFF, "GL_NV_texture_env_combine4",        F(NV_texture_env_combine4) },
 182    { OFF, "GL_NV_texture_rectangle",           F(NV_texture_rectangle) },
 183    { ON,  "GL_NV_texgen_reflection",           F(NV_texgen_reflection) },
 184    { OFF, "GL_NV_vertex_program",              F(NV_vertex_program) },
 185    { OFF, "GL_NV_vertex_program1_1",           F(NV_vertex_program1_1) },
 186    { ON,  "GL_OES_read_format",                F(OES_read_format) },
 187    { OFF, "GL_SGI_color_matrix",               F(SGI_color_matrix) },
 188    { OFF, "GL_SGI_color_table",                F(SGI_color_table) },
 189    { OFF, "GL_SGI_texture_color_table",        F(SGI_texture_color_table) },
 190    { OFF, "GL_SGIS_generate_mipmap",           F(SGIS_generate_mipmap) },
 191    { OFF, "GL_SGIS_texture_border_clamp",      F(ARB_texture_border_clamp) },
 192    { ON,  "GL_SGIS_texture_edge_clamp",        F(SGIS_texture_edge_clamp) },
 193    { ON,  "GL_SGIS_texture_lod",               F(SGIS_texture_lod) },
 194    { ON,  "GL_SUN_multi_draw_arrays",          F(EXT_multi_draw_arrays) },
 195    { OFF, "GL_S3_s3tc",                        F(S3_s3tc) },
 196 #if FEATURE_OES_draw_texture
 197    { OFF, "GL_OES_draw_texture",               F(OES_draw_texture) },
 198 #endif /* FEATURE_OES_draw_texture */
 199 };
 200
 201
 202
 203 /**
 204  * Enable all extensions suitable for a software-only renderer.
 205  * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
 206  */
 207 void
 208 _mesa_enable_sw_extensions(GLcontext *ctx)
 209 {
 210    ctx->Extensions.ARB_copy_buffer = GL_TRUE;
 211    ctx->Extensions.ARB_depth_clamp = GL_TRUE;
 212    ctx->Extensions.ARB_depth_texture = GL_TRUE;
 213    /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
 214    ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
 215 #if FEATURE_ARB_fragment_program
 216    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 217    ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
 218 #endif
 219 #if FEATURE_ARB_fragment_shader
 220    ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 221 #endif
 222 #if FEATURE_ARB_framebuffer_object
 223    ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
 224 #endif
 225    ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
 226    ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
 227    ctx->Extensions.ARB_imaging = GL_TRUE;
 228    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
 229    ctx->Extensions.ARB_multitexture = GL_TRUE;
 230 #if FEATURE_queryobj
 231    ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 232 #endif
 233    ctx->Extensions.ARB_point_sprite = GL_TRUE;
 234 #if FEATURE_ARB_shader_objects
 235    ctx->Extensions.ARB_shader_objects = GL_TRUE;
 236 #endif
 237 #if FEATURE_ARB_shading_language_100
 238    ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 239 #endif
 240 #if FEATURE_ARB_shading_language_120
 241    ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 242 #endif
 243    ctx->Extensions.ARB_shadow = GL_TRUE;
 244    ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
 245    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
 246    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 247    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 248    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 249    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 250    /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
 251    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 252    ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 253    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
 254 #if FEATURE_ARB_vertex_program
 255    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 256 #endif
 257 #if FEATURE_ARB_vertex_shader
 258    ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 259 #endif
 260 #if FEATURE_ARB_vertex_buffer_object
 261    /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
 262 #endif
 263 #if FEATURE_ARB_sync
 264    ctx->Extensions.ARB_sync = GL_TRUE;
 265 #endif
 266    ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
 267    ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
 268 #if FEATURE_ATI_fragment_shader
 269    ctx->Extensions.ATI_fragment_shader = GL_TRUE;
 270 #endif
 271    ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
 272    ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
 273    ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 274    ctx->Extensions.EXT_blend_color = GL_TRUE;
 275    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 276    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 277    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 278    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 279    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 280    ctx->Extensions.EXT_convolution = GL_TRUE;
 281    ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
 282    ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
 283    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 284 #if FEATURE_EXT_framebuffer_object
 285    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 286 #endif
 287 #if FEATURE_EXT_framebuffer_blit
 288    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 289 #endif
 290 #if FEATURE_ARB_framebuffer_object
 291    ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
 292 #endif
 293    ctx->Extensions.EXT_histogram = GL_TRUE;
 294    /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
 295    ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 296    ctx->Extensions.EXT_paletted_texture = GL_TRUE;
 297 #if FEATURE_EXT_pixel_buffer_object
 298    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 299 #endif
 300    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 301    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
 302    ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 303    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 304    ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
 305    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 306    ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 307    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 308    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 309    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 310    ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
 311    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 312 #if FEATURE_EXT_texture_sRGB
 313    ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 314 #endif
 315    ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
 316    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 317    /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
 318    ctx->Extensions.MESA_pack_invert = GL_TRUE;
 319    ctx->Extensions.MESA_resize_buffers = GL_TRUE;
 320    ctx->Extensions.MESA_texture_array = GL_TRUE;
 321    ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
 322    ctx->Extensions.NV_blend_square = GL_TRUE;
 323    ctx->Extensions.NV_conditional_render = GL_TRUE;
 324    /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
 325    ctx->Extensions.NV_point_sprite = GL_TRUE;
 326    ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
 327    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 328    /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
 329 #if FEATURE_NV_vertex_program
 330    ctx->Extensions.NV_vertex_program = GL_TRUE;
 331    ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
 332 #endif
 333 #if FEATURE_NV_fragment_program
 334    ctx->Extensions.NV_fragment_program = GL_TRUE;
 335 #endif
 336 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
 337    ctx->Extensions.NV_fragment_program_option = GL_TRUE;
 338 #endif
 339    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 340    ctx->Extensions.SGI_color_table = GL_TRUE;
 341    ctx->Extensions.SGI_texture_color_table = GL_TRUE;
 342    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 343    ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
 344 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
 345    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
 346 #endif
 347 #if FEATURE_texture_fxt1
 348    _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
 349 #endif
 350 #if FEATURE_texture_s3tc
 351    if (ctx->Mesa_DXTn) {
 352       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 353       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 354    }
 355 #endif
 356 }
 357
 358
 359 /**
 360  * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
 361  */
 362 void
 363 _mesa_enable_imaging_extensions(GLcontext *ctx)
 364 {
 365    ctx->Extensions.ARB_imaging = GL_TRUE;
 366    ctx->Extensions.EXT_blend_color = GL_TRUE;
 367    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 368    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 369    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 370    ctx->Extensions.EXT_convolution = GL_TRUE;
 371    ctx->Extensions.EXT_histogram = GL_TRUE;
 372    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 373    ctx->Extensions.SGI_color_table = GL_TRUE;
 374 }
 375
 376
 377
 378 /**
 379  * Enable all OpenGL 1.3 features and extensions.
 380  * A convenience function to be called by drivers.
 381  */
 382 void
 383 _mesa_enable_1_3_extensions(GLcontext *ctx)
 384 {
 385    /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
 386    ctx->Extensions.ARB_multitexture = GL_TRUE;
 387    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
 388    /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
 389    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 390    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 391    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 392    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 393    /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
 394 }
 395
 396
 397
 398 /**
 399  * Enable all OpenGL 1.4 features and extensions.
 400  * A convenience function to be called by drivers.
 401  */
 402 void
 403 _mesa_enable_1_4_extensions(GLcontext *ctx)
 404 {
 405    ctx->Extensions.ARB_depth_texture = GL_TRUE;
 406    ctx->Extensions.ARB_shadow = GL_TRUE;
 407    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 408    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 409    ctx->Extensions.ARB_window_pos = GL_TRUE;
 410    ctx->Extensions.EXT_blend_color = GL_TRUE;
 411    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 412    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 413    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 414    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 415    /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
 416    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 417    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 418    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 419    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 420    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 421 }
 422
 423
 424 /**
 425  * Enable all OpenGL 1.5 features and extensions.
 426  * A convenience function to be called by drivers.
 427  */
 428 void
 429 _mesa_enable_1_5_extensions(GLcontext *ctx)
 430 {
 431    ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 432    /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
 433    ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 434 }
 435
 436
 437 /**
 438  * Enable all OpenGL 2.0 features and extensions.
 439  * A convenience function to be called by drivers.
 440  */
 441 void
 442 _mesa_enable_2_0_extensions(GLcontext *ctx)
 443 {
 444    /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
 445 #if FEATURE_ARB_fragment_shader
 446    ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 447 #endif
 448    ctx->Extensions.ARB_point_sprite = GL_TRUE;
 449    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 450    ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 451 #if FEATURE_ARB_shader_objects
 452    ctx->Extensions.ARB_shader_objects = GL_TRUE;
 453 #endif
 454 #if FEATURE_ARB_shading_language_100
 455    ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 456 #endif
 457    ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 458 #if FEATURE_ARB_vertex_shader
 459    ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 460 #endif
 461 }
 462
 463
 464 /**
 465  * Enable all OpenGL 2.1 features and extensions.
 466  * A convenience function to be called by drivers.
 467  */
 468 void
 469 _mesa_enable_2_1_extensions(GLcontext *ctx)
 470 {
 471 #if FEATURE_EXT_pixel_buffer_object
 472    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 473 #endif
 474 #if FEATURE_EXT_texture_sRGB
 475    ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 476 #endif
 477 #ifdef FEATURE_ARB_shading_language_120
 478    ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 479 #endif
 480 }
 481
 482
 483
 484 /**
 485  * Either enable or disable the named extension.
 486  * \return GL_TRUE for success, GL_FALSE if invalid extension name
 487  */
 488 static GLboolean
 489 set_extension( GLcontext *ctx, const char *name, GLboolean state )
 490 {
 491    GLboolean *base = (GLboolean *) &ctx->Extensions;
 492    GLuint i;
 493
 494    if (ctx->Extensions.String) {
 495       /* The string was already queried - can't change it now! */
 496       _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
 497       return GL_FALSE;
 498    }
 499
 500    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 501       if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
 502          if (default_extensions[i].flag_offset) {
 503             GLboolean *enabled = base + default_extensions[i].flag_offset;
 504             *enabled = state;
 505          }
 506          return GL_TRUE;
 507       }
 508    }
 509    return GL_FALSE;
 510 }
 511
 512
 513 /**
 514  * Enable the named extension.
 515  * Typically called by drivers.
 516  */
 517 void
 518 _mesa_enable_extension( GLcontext *ctx, const char *name )
 519 {
 520    if (!set_extension(ctx, name, GL_TRUE))
 521       _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
 522 }
 523
 524
 525 /**
 526  * Disable the named extension.
 527  * XXX is this really needed???
 528  */
 529 void
 530 _mesa_disable_extension( GLcontext *ctx, const char *name )
 531 {
 532    if (!set_extension(ctx, name, GL_FALSE))
 533       _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
 534 }
 535
 536
 537 /**
 538  * Check if the i-th extension is enabled.
 539  */
 540 static GLboolean
 541 extension_enabled(GLcontext *ctx, GLuint index)
 542 {
 543    const GLboolean *base = (const GLboolean *) &ctx->Extensions;
 544    if (!default_extensions[index].flag_offset ||
 545        *(base + default_extensions[index].flag_offset)) {
 546       return GL_TRUE;
 547    }
 548    else {
 549       return GL_FALSE;
 550    }
 551 }
 552
 553
 554 /**
 555  * Test if the named extension is enabled in this context.
 556  */
 557 GLboolean
 558 _mesa_extension_is_enabled( GLcontext *ctx, const char *name )
 559 {
 560    GLuint i;
 561
 562    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 563       if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
 564          return extension_enabled(ctx, i);
 565       }
 566    }
 567    return GL_FALSE;
 568 }
 569
 570
 571 /**
 572  * Append string 'b' onto string 'a'.  Free 'a' and return new string.
 573  */
 574 static char *
 575 append(const char *a, const char *b)
 576 {
 577    const GLuint aLen = a ? _mesa_strlen(a) : 0;
 578    const GLuint bLen = b ? _mesa_strlen(b) : 0;
 579    char *s = _mesa_calloc(aLen + bLen + 1);
 580    if (s) {
 581       if (a)
 582          _mesa_memcpy(s, a, aLen);
 583       if (b)
 584          _mesa_memcpy(s + aLen, b, bLen);
 585       s[aLen + bLen] = '\0';
 586    }
 587    if (a)
 588       _mesa_free((void *) a);
 589    return s;
 590 }
 591
 592
 593 /**
 594  * Check the MESA_EXTENSION_OVERRIDE env var.
 595  * For extension names that are recognized, turn them on.  For extension
 596  * names that are recognized and prefixed with '-', turn them off.
 597  * Return a string of the unknown/leftover names.
 598  */
 599 static const char *
 600 get_extension_override( GLcontext *ctx )
 601 {
 602    const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
 603    char *extraExt = NULL;
 604    char ext[1000];
 605    GLuint extLen = 0;
 606    GLuint i;
 607    GLboolean disableExt = GL_FALSE;
 608
 609    if (!envExt)
 610       return NULL;
 611
 612    for (i = 0; ; i++) {
 613       if (envExt[i] == '\0' || envExt[i] == ' ') {
 614          /* terminate/process 'ext' if extLen > 0 */
 615          if (extLen > 0) {
 616             assert(extLen < sizeof(ext));
 617             /* enable extension named by 'ext' */
 618             ext[extLen] = 0;
 619             if (!set_extension(ctx, ext, !disableExt)) {
 620                /* unknown extension name, append it to extraExt */
 621                if (extraExt) {
 622                   extraExt = append(extraExt, " ");
 623                }
 624                extraExt = append(extraExt, ext);
 625             }
 626             extLen = 0;
 627             disableExt = GL_FALSE;
 628          }
 629          if (envExt[i] == '\0')
 630             break;
 631       }
 632       else if (envExt[i] == '-') {
 633          disableExt = GL_TRUE;
 634       }
 635       else {
 636          /* accumulate this non-space character */
 637          ext[extLen++] = envExt[i];
 638       }
 639    }
 640
 641    return extraExt;
 642 }
 643
 644
 645 /**
 646  * Run through the default_extensions array above and set the
 647  * ctx->Extensions.ARB/EXT_* flags accordingly.
 648  * To be called during context initialization.
 649  */
 650 void
 651 _mesa_init_extensions( GLcontext *ctx )
 652 {
 653    GLboolean *base = (GLboolean *) &ctx->Extensions;
 654    GLuint i;
 655
 656    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 657       if (default_extensions[i].enabled &&
 658           default_extensions[i].flag_offset) {
 659          *(base + default_extensions[i].flag_offset) = GL_TRUE;
 660       }
 661    }
 662 }
 663
 664
 665 /**
 666  * Construct the GL_EXTENSIONS string.  Called the first time that
 667  * glGetString(GL_EXTENSIONS) is called.
 668  */
 669 GLubyte *
 670 _mesa_make_extension_string( GLcontext *ctx )
 671 {
 672    const char *extraExt = get_extension_override(ctx);
 673    GLuint extStrLen = 0;
 674    char *s;
 675    GLuint i;
 676
 677    /* first, compute length of the extension string */
 678    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 679       if (extension_enabled(ctx, i)) {
 680          extStrLen += (GLuint)_mesa_strlen(default_extensions[i].name) + 1;
 681       }
 682    }
 683
 684    if (extraExt)
 685       extStrLen += _mesa_strlen(extraExt) + 1; /* +1 for space */
 686
 687    /* allocate the extension string */
 688    s = (char *) _mesa_malloc(extStrLen);
 689    if (!s)
 690       return NULL;
 691
 692    /* second, build the extension string */
 693    extStrLen = 0;
 694    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 695       if (extension_enabled(ctx, i)) {
 696          GLuint len = (GLuint)_mesa_strlen(default_extensions[i].name);
 697          _mesa_memcpy(s + extStrLen, default_extensions[i].name, len);
 698          extStrLen += len;
 699          s[extStrLen] = ' ';
 700          extStrLen++;
 701       }
 702    }
 703    ASSERT(extStrLen > 0);
 704
 705    s[extStrLen - 1] = 0; /* -1 to overwrite trailing the ' ' */
 706
 707    if (extraExt) {
 708       s = append(s, " ");
 709       s = append(s, extraExt);
 710    }
 711
 712    return (GLubyte *) s;
 713 }
 714
 715
 716 /**
 717  * Return number of enabled extensions.
 718  */
 719 GLuint
 720 _mesa_get_extension_count(GLcontext *ctx)
 721 {
 722    GLuint i;
 723
 724    /* only count once */
 725    if (!ctx->Extensions.Count) {
 726       for (i = 0; i < Elements(default_extensions); i++) {
 727          if (extension_enabled(ctx, i)) {
 728             ctx->Extensions.Count++;
 729          }
 730       }
 731    }
 732
 733    if (0)
 734       _mesa_debug(ctx, "%u of %d extensions enabled\n", ctx->Extensions.Count,
 735                   Elements(default_extensions));
 736
 737    return ctx->Extensions.Count;
 738 }
 739
 740
 741 /**
 742  * Return name of i-th enabled extension
 743  */
 744 const GLubyte *
 745 _mesa_get_enabled_extension(GLcontext *ctx, GLuint index)
 746 {
 747    GLuint i;
 748
 749    for (i = 0; i < Elements(default_extensions); i++) {
 750       if (extension_enabled(ctx, i)) {
 751          if (index == 0)
 752             return (const GLubyte *) default_extensions[i].name;
 753          index--;
 754       }
 755    }
 756
 757    return NULL;
 758 }