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 };
 193
 194
 195
 196 /**
 197  * Enable all extensions suitable for a software-only renderer.
 198  * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
 199  */
 200 void
 201 _mesa_enable_sw_extensions(GLcontext *ctx)
 202 {
 203    ctx->Extensions.ARB_copy_buffer = GL_TRUE;
 204    ctx->Extensions.ARB_depth_clamp = GL_TRUE;
 205    ctx->Extensions.ARB_depth_texture = GL_TRUE;
 206    /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
 207    ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
 208 #if FEATURE_ARB_fragment_program
 209    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 210    ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
 211 #endif
 212 #if FEATURE_ARB_fragment_shader
 213    ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 214 #endif
 215 #if FEATURE_ARB_framebuffer_object
 216    ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
 217 #endif
 218    ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
 219    ctx->Extensions.ARB_imaging = GL_TRUE;
 220    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
 221    ctx->Extensions.ARB_multitexture = GL_TRUE;
 222 #if FEATURE_queryobj
 223    ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 224 #endif
 225    ctx->Extensions.ARB_point_sprite = GL_TRUE;
 226 #if FEATURE_ARB_shader_objects
 227    ctx->Extensions.ARB_shader_objects = GL_TRUE;
 228 #endif
 229 #if FEATURE_ARB_shading_language_100
 230    ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 231 #endif
 232 #if FEATURE_ARB_shading_language_120
 233    ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 234 #endif
 235    ctx->Extensions.ARB_shadow = GL_TRUE;
 236    ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
 237    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
 238    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 239    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 240    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 241    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 242    /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
 243    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 244    ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 245    ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
 246 #if FEATURE_ARB_vertex_program
 247    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 248 #endif
 249 #if FEATURE_ARB_vertex_shader
 250    ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 251 #endif
 252 #if FEATURE_ARB_vertex_buffer_object
 253    /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
 254 #endif
 255 #if FEATURE_ARB_sync
 256    ctx->Extensions.ARB_sync = GL_TRUE;
 257 #endif
 258    ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
 259    ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
 260 #if FEATURE_ATI_fragment_shader
 261    ctx->Extensions.ATI_fragment_shader = GL_TRUE;
 262 #endif
 263    ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
 264    ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
 265    ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 266    ctx->Extensions.EXT_blend_color = GL_TRUE;
 267    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 268    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 269    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 270    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 271    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 272    ctx->Extensions.EXT_convolution = GL_TRUE;
 273    ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
 274    ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
 275    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 276 #if FEATURE_EXT_framebuffer_object
 277    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 278 #endif
 279 #if FEATURE_EXT_framebuffer_blit
 280    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 281 #endif
 282 #if FEATURE_ARB_framebuffer_object
 283    ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
 284 #endif
 285    ctx->Extensions.EXT_histogram = GL_TRUE;
 286    /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
 287    ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
 288    ctx->Extensions.EXT_paletted_texture = GL_TRUE;
 289 #if FEATURE_EXT_pixel_buffer_object
 290    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 291 #endif
 292    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 293    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
 294    ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 295    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 296    ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
 297    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 298    ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 299    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 300    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 301    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 302    ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
 303    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 304 #if FEATURE_EXT_texture_sRGB
 305    ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 306 #endif
 307    ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
 308    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
 309    /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
 310    ctx->Extensions.MESA_pack_invert = GL_TRUE;
 311    ctx->Extensions.MESA_resize_buffers = GL_TRUE;
 312    ctx->Extensions.MESA_texture_array = GL_TRUE;
 313    ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
 314    ctx->Extensions.NV_blend_square = GL_TRUE;
 315    ctx->Extensions.NV_conditional_render = GL_TRUE;
 316    /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
 317    ctx->Extensions.NV_point_sprite = GL_TRUE;
 318    ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
 319    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 320    /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
 321 #if FEATURE_NV_vertex_program
 322    ctx->Extensions.NV_vertex_program = GL_TRUE;
 323    ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
 324 #endif
 325 #if FEATURE_NV_fragment_program
 326    ctx->Extensions.NV_fragment_program = GL_TRUE;
 327 #endif
 328 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
 329    ctx->Extensions.NV_fragment_program_option = GL_TRUE;
 330 #endif
 331    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 332    ctx->Extensions.SGI_color_table = GL_TRUE;
 333    ctx->Extensions.SGI_texture_color_table = GL_TRUE;
 334    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 335    ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
 336 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
 337    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
 338 #endif
 339 #if FEATURE_texture_fxt1
 340    _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
 341 #endif
 342 #if FEATURE_texture_s3tc
 343    if (ctx->Mesa_DXTn) {
 344       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 345       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 346    }
 347 #endif
 348 }
 349
 350
 351 /**
 352  * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
 353  */
 354 void
 355 _mesa_enable_imaging_extensions(GLcontext *ctx)
 356 {
 357    ctx->Extensions.ARB_imaging = GL_TRUE;
 358    ctx->Extensions.EXT_blend_color = GL_TRUE;
 359    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 360    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 361    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 362    ctx->Extensions.EXT_convolution = GL_TRUE;
 363    ctx->Extensions.EXT_histogram = GL_TRUE;
 364    ctx->Extensions.SGI_color_matrix = GL_TRUE;
 365    ctx->Extensions.SGI_color_table = GL_TRUE;
 366 }
 367
 368
 369
 370 /**
 371  * Enable all OpenGL 1.3 features and extensions.
 372  * A convenience function to be called by drivers.
 373  */
 374 void
 375 _mesa_enable_1_3_extensions(GLcontext *ctx)
 376 {
 377    /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
 378    ctx->Extensions.ARB_multitexture = GL_TRUE;
 379    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
 380    /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
 381    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 382    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 383    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 384    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 385    /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
 386 }
 387
 388
 389
 390 /**
 391  * Enable all OpenGL 1.4 features and extensions.
 392  * A convenience function to be called by drivers.
 393  */
 394 void
 395 _mesa_enable_1_4_extensions(GLcontext *ctx)
 396 {
 397    ctx->Extensions.ARB_depth_texture = GL_TRUE;
 398    ctx->Extensions.ARB_shadow = GL_TRUE;
 399    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 400    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
 401    ctx->Extensions.ARB_window_pos = GL_TRUE;
 402    ctx->Extensions.EXT_blend_color = GL_TRUE;
 403    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 404    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 405    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 406    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 407    /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
 408    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 409    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 410    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 411    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 412    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
 413 }
 414
 415
 416 /**
 417  * Enable all OpenGL 1.5 features and extensions.
 418  * A convenience function to be called by drivers.
 419  */
 420 void
 421 _mesa_enable_1_5_extensions(GLcontext *ctx)
 422 {
 423    ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 424    /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
 425    ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 426 }
 427
 428
 429 /**
 430  * Enable all OpenGL 2.0 features and extensions.
 431  * A convenience function to be called by drivers.
 432  */
 433 void
 434 _mesa_enable_2_0_extensions(GLcontext *ctx)
 435 {
 436    /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
 437 #if FEATURE_ARB_fragment_shader
 438    ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 439 #endif
 440    ctx->Extensions.ARB_point_sprite = GL_TRUE;
 441    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 442    ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 443 #if FEATURE_ARB_shader_objects
 444    ctx->Extensions.ARB_shader_objects = GL_TRUE;
 445 #endif
 446 #if FEATURE_ARB_shading_language_100
 447    ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 448 #endif
 449    ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
 450 #if FEATURE_ARB_vertex_shader
 451    ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 452 #endif
 453 }
 454
 455
 456 /**
 457  * Enable all OpenGL 2.1 features and extensions.
 458  * A convenience function to be called by drivers.
 459  */
 460 void
 461 _mesa_enable_2_1_extensions(GLcontext *ctx)
 462 {
 463 #if FEATURE_EXT_pixel_buffer_object
 464    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 465 #endif
 466 #if FEATURE_EXT_texture_sRGB
 467    ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 468 #endif
 469 #ifdef FEATURE_ARB_shading_language_120
 470    ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 471 #endif
 472 }
 473
 474
 475
 476 /**
 477  * Either enable or disable the named extension.
 478  * \return GL_TRUE for success, GL_FALSE if invalid extension name
 479  */
 480 static GLboolean
 481 set_extension( GLcontext *ctx, const char *name, GLboolean state )
 482 {
 483    GLboolean *base = (GLboolean *) &ctx->Extensions;
 484    GLuint i;
 485
 486    if (ctx->Extensions.String) {
 487       /* The string was already queried - can't change it now! */
 488       _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
 489       return GL_FALSE;
 490    }
 491
 492    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 493       if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
 494          if (default_extensions[i].flag_offset) {
 495             GLboolean *enabled = base + default_extensions[i].flag_offset;
 496             *enabled = state;
 497          }
 498          return GL_TRUE;
 499       }
 500    }
 501    return GL_FALSE;
 502 }
 503
 504
 505 /**
 506  * Enable the named extension.
 507  * Typically called by drivers.
 508  */
 509 void
 510 _mesa_enable_extension( GLcontext *ctx, const char *name )
 511 {
 512    if (!set_extension(ctx, name, GL_TRUE))
 513       _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
 514 }
 515
 516
 517 /**
 518  * Disable the named extension.
 519  * XXX is this really needed???
 520  */
 521 void
 522 _mesa_disable_extension( GLcontext *ctx, const char *name )
 523 {
 524    if (!set_extension(ctx, name, GL_FALSE))
 525       _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
 526 }
 527
 528
 529 /**
 530  * Check if the i-th extension is enabled.
 531  */
 532 static GLboolean
 533 extension_enabled(GLcontext *ctx, GLuint index)
 534 {
 535    const GLboolean *base = (const GLboolean *) &ctx->Extensions;
 536    if (!default_extensions[index].flag_offset ||
 537        *(base + default_extensions[index].flag_offset)) {
 538       return GL_TRUE;
 539    }
 540    else {
 541       return GL_FALSE;
 542    }
 543 }
 544
 545
 546 /**
 547  * Test if the named extension is enabled in this context.
 548  */
 549 GLboolean
 550 _mesa_extension_is_enabled( GLcontext *ctx, const char *name )
 551 {
 552    GLuint i;
 553
 554    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 555       if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
 556          return extension_enabled(ctx, i);
 557       }
 558    }
 559    return GL_FALSE;
 560 }
 561
 562
 563 /**
 564  * Append string 'b' onto string 'a'.  Free 'a' and return new string.
 565  */
 566 static char *
 567 append(const char *a, const char *b)
 568 {
 569    const GLuint aLen = a ? _mesa_strlen(a) : 0;
 570    const GLuint bLen = b ? _mesa_strlen(b) : 0;
 571    char *s = _mesa_calloc(aLen + bLen + 1);
 572    if (s) {
 573       if (a)
 574          _mesa_memcpy(s, a, aLen);
 575       if (b)
 576          _mesa_memcpy(s + aLen, b, bLen);
 577       s[aLen + bLen] = '\0';
 578    }
 579    if (a)
 580       _mesa_free((void *) a);
 581    return s;
 582 }
 583
 584
 585 /**
 586  * Check the MESA_EXTENSION_OVERRIDE env var.
 587  * For extension names that are recognized, turn them on.  For extension
 588  * names that are recognized and prefixed with '-', turn them off.
 589  * Return a string of the unknown/leftover names.
 590  */
 591 static const char *
 592 get_extension_override( GLcontext *ctx )
 593 {
 594    const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
 595    char *extraExt = NULL;
 596    char ext[1000];
 597    GLuint extLen = 0;
 598    GLuint i;
 599    GLboolean disableExt = GL_FALSE;
 600
 601    if (!envExt)
 602       return NULL;
 603
 604    for (i = 0; ; i++) {
 605       if (envExt[i] == '\0' || envExt[i] == ' ') {
 606          /* terminate/process 'ext' if extLen > 0 */
 607          if (extLen > 0) {
 608             assert(extLen < sizeof(ext));
 609             /* enable extension named by 'ext' */
 610             ext[extLen] = 0;
 611             if (!set_extension(ctx, ext, !disableExt)) {
 612                /* unknown extension name, append it to extraExt */
 613                if (extraExt) {
 614                   extraExt = append(extraExt, " ");
 615                }
 616                extraExt = append(extraExt, ext);
 617             }
 618             extLen = 0;
 619             disableExt = GL_FALSE;
 620          }
 621          if (envExt[i] == '\0')
 622             break;
 623       }
 624       else if (envExt[i] == '-') {
 625          disableExt = GL_TRUE;
 626       }
 627       else {
 628          /* accumulate this non-space character */
 629          ext[extLen++] = envExt[i];
 630       }
 631    }
 632
 633    return extraExt;
 634 }
 635
 636
 637 /**
 638  * Run through the default_extensions array above and set the
 639  * ctx->Extensions.ARB/EXT_* flags accordingly.
 640  * To be called during context initialization.
 641  */
 642 void
 643 _mesa_init_extensions( GLcontext *ctx )
 644 {
 645    GLboolean *base = (GLboolean *) &ctx->Extensions;
 646    GLuint i;
 647
 648    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 649       if (default_extensions[i].enabled &&
 650           default_extensions[i].flag_offset) {
 651          *(base + default_extensions[i].flag_offset) = GL_TRUE;
 652       }
 653    }
 654 }
 655
 656
 657 /**
 658  * Construct the GL_EXTENSIONS string.  Called the first time that
 659  * glGetString(GL_EXTENSIONS) is called.
 660  */
 661 GLubyte *
 662 _mesa_make_extension_string( GLcontext *ctx )
 663 {
 664    const char *extraExt = get_extension_override(ctx);
 665    GLuint extStrLen = 0;
 666    char *s;
 667    GLuint i;
 668
 669    /* first, compute length of the extension string */
 670    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 671       if (extension_enabled(ctx, i)) {
 672          extStrLen += (GLuint)_mesa_strlen(default_extensions[i].name) + 1;
 673       }
 674    }
 675
 676    if (extraExt)
 677       extStrLen += _mesa_strlen(extraExt) + 1; /* +1 for space */
 678
 679    /* allocate the extension string */
 680    s = (char *) _mesa_malloc(extStrLen);
 681    if (!s)
 682       return NULL;
 683
 684    /* second, build the extension string */
 685    extStrLen = 0;
 686    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 687       if (extension_enabled(ctx, i)) {
 688          GLuint len = (GLuint)_mesa_strlen(default_extensions[i].name);
 689          _mesa_memcpy(s + extStrLen, default_extensions[i].name, len);
 690          extStrLen += len;
 691          s[extStrLen] = ' ';
 692          extStrLen++;
 693       }
 694    }
 695    ASSERT(extStrLen > 0);
 696
 697    s[extStrLen - 1] = 0; /* -1 to overwrite trailing the ' ' */
 698
 699    if (extraExt) {
 700       s = append(s, " ");
 701       s = append(s, extraExt);
 702    }
 703
 704    return (GLubyte *) s;
 705 }
 706
 707
 708 /**
 709  * Return number of enabled extensions.
 710  */
 711 GLuint
 712 _mesa_get_extension_count(GLcontext *ctx)
 713 {
 714    GLuint i;
 715
 716    /* only count once */
 717    if (!ctx->Extensions.Count) {
 718       for (i = 0; i < Elements(default_extensions); i++) {
 719          if (extension_enabled(ctx, i)) {
 720             ctx->Extensions.Count++;
 721          }
 722       }
 723    }
 724
 725    if (0)
 726       _mesa_debug(ctx, "%u of %d extensions enabled\n", ctx->Extensions.Count,
 727                   Elements(default_extensions));
 728
 729    return ctx->Extensions.Count;
 730 }
 731
 732
 733 /**
 734  * Return name of i-th enabled extension
 735  */
 736 const GLubyte *
 737 _mesa_get_enabled_extension(GLcontext *ctx, GLuint index)
 738 {
 739    GLuint i;
 740
 741    for (i = 0; i < Elements(default_extensions); i++) {
 742       if (extension_enabled(ctx, i)) {
 743          if (index == 0)
 744             return (const GLubyte *) default_extensions[i].name;
 745          index--;
 746       }
 747    }
 748
 749    return NULL;
 750 }