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