2 * (C) Copyright IBM Corporation 2002, 2004
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 * \file glxextensions.c
28 * \author Ian Romanick <idr@us.ibm.com>
31 #include "glxclient.h"
32 #include <X11/extensions/extutil.h>
33 #include <X11/extensions/Xext.h>
35 #include "glxextensions.h"
38 #define SET_BIT(m,b) (m[ (b) / 8 ] |= (1U << ((b) % 8)))
39 #define CLR_BIT(m,b) (m[ (b) / 8 ] &= ~(1U << ((b) % 8)))
40 #define IS_SET(m,b) ((m[ (b) / 8 ] & (1U << ((b) % 8))) != 0)
41 #define CONCAT(a,b) a ## b
42 #define GLX(n) "GLX_" # n, 4 + sizeof( # n ) - 1, CONCAT(n,_bit)
43 #define GL(n) "GL_" # n, 3 + sizeof( # n ) - 1, GL_ ## n ## _bit
47 #define EXT_ENABLED(bit,supported) (IS_SET( supported, bit ))
52 const char *const name
;
57 /* This is the lowest version of GLX that "requires" this extension.
58 * For example, GLX 1.3 requires SGIX_fbconfig, SGIX_pbuffer, and
59 * SGI_make_current_read. If the extension is not required by any known
60 * version of GLX, use 0, 0.
62 unsigned char version_major
;
63 unsigned char version_minor
;
64 unsigned char client_support
;
65 unsigned char direct_support
;
66 unsigned char client_only
; /** Is the extension client-side only? */
67 unsigned char direct_only
; /** Is the extension for direct
73 static const struct extension_info known_glx_extensions
[] = {
74 { GLX(ARB_get_proc_address
), VER(1,4), Y
, N
, Y
, N
},
75 { GLX(ARB_multisample
), VER(1,4), Y
, Y
, N
, N
},
76 { GLX(ARB_render_texture
), VER(0,0), N
, N
, N
, N
},
77 { GLX(ATI_pixel_format_float
), VER(0,0), N
, N
, N
, N
},
78 #ifdef GLX_USE_APPLEGL
79 { GLX(EXT_import_context
), VER(0,0), N
, N
, N
, N
},
80 { GLX(EXT_visual_info
), VER(0,0), N
, N
, N
, N
},
82 { GLX(EXT_import_context
), VER(0,0), Y
, Y
, N
, N
},
83 { GLX(EXT_visual_info
), VER(0,0), Y
, Y
, N
, N
},
85 { GLX(EXT_visual_rating
), VER(0,0), Y
, Y
, N
, N
},
86 #ifdef GLX_USE_APPLEGL
87 { GLX(MESA_agp_offset
), VER(0,0), N
, N
, N
, N
}, /* Deprecated */
88 { GLX(MESA_copy_sub_buffer
), VER(0,0), N
, N
, N
, N
},
90 { GLX(MESA_agp_offset
), VER(0,0), N
, N
, N
, Y
}, /* Deprecated */
91 { GLX(MESA_copy_sub_buffer
), VER(0,0), Y
, N
, N
, N
},
93 { GLX(MESA_multithread_makecurrent
),VER(0,0), Y
, N
, Y
, N
},
94 { GLX(MESA_pixmap_colormap
), VER(0,0), N
, N
, N
, N
}, /* Deprecated */
95 { GLX(MESA_release_buffers
), VER(0,0), N
, N
, N
, N
}, /* Deprecated */
96 #ifdef GLX_USE_APPLEGL
97 { GLX(MESA_swap_control
), VER(0,0), N
, N
, N
, N
},
99 { GLX(MESA_swap_control
), VER(0,0), Y
, N
, N
, Y
},
101 { GLX(NV_float_buffer
), VER(0,0), N
, N
, N
, N
},
102 { GLX(NV_render_depth_texture
), VER(0,0), N
, N
, N
, N
},
103 { GLX(NV_render_texture_rectangle
), VER(0,0), N
, N
, N
, N
},
104 #ifdef GLX_USE_APPLEGL
105 { GLX(NV_vertex_array_range
), VER(0,0), N
, N
, N
, N
}, /* Deprecated */
106 { GLX(OML_swap_method
), VER(0,0), N
, N
, N
, N
},
107 { GLX(OML_sync_control
), VER(0,0), N
, N
, N
, N
},
108 { GLX(SGI_make_current_read
), VER(1,3), N
, N
, N
, N
},
109 { GLX(SGI_swap_control
), VER(0,0), N
, N
, N
, N
},
110 { GLX(SGI_video_sync
), VER(0,0), N
, N
, N
, N
},
112 { GLX(NV_vertex_array_range
), VER(0,0), N
, N
, N
, Y
}, /* Deprecated */
113 { GLX(OML_swap_method
), VER(0,0), Y
, Y
, N
, N
},
114 { GLX(OML_sync_control
), VER(0,0), Y
, N
, N
, Y
},
115 { GLX(SGI_make_current_read
), VER(1,3), Y
, N
, N
, N
},
116 { GLX(SGI_swap_control
), VER(0,0), Y
, N
, N
, N
},
117 { GLX(SGI_video_sync
), VER(0,0), Y
, N
, N
, Y
},
119 { GLX(SGIS_blended_overlay
), VER(0,0), N
, N
, N
, N
},
120 { GLX(SGIS_color_range
), VER(0,0), N
, N
, N
, N
},
121 #ifdef GLX_USE_APPLEGL
122 { GLX(SGIS_multisample
), VER(0,0), N
, N
, N
, N
},
124 { GLX(SGIS_multisample
), VER(0,0), Y
, Y
, N
, N
},
126 { GLX(SGIX_fbconfig
), VER(1,3), Y
, Y
, N
, N
},
127 #ifdef GLX_USE_APPLEGL
128 { GLX(SGIX_pbuffer
), VER(1,3), N
, N
, N
, N
},
130 { GLX(SGIX_pbuffer
), VER(1,3), Y
, Y
, N
, N
},
132 { GLX(SGIX_swap_barrier
), VER(0,0), N
, N
, N
, N
},
133 { GLX(SGIX_swap_group
), VER(0,0), N
, N
, N
, N
},
134 #ifdef GLX_USE_APPLEGL
135 { GLX(SGIX_visual_select_group
), VER(0,0), N
, N
, N
, N
},
136 { GLX(EXT_texture_from_pixmap
), VER(0,0), N
, N
, N
, N
},
138 { GLX(SGIX_visual_select_group
), VER(0,0), Y
, Y
, N
, N
},
139 { GLX(EXT_texture_from_pixmap
), VER(0,0), Y
, N
, N
, N
},
141 { GLX(INTEL_swap_event
), VER(1,4), Y
, Y
, N
, N
},
145 static const struct extension_info known_gl_extensions
[] = {
146 { GL(ARB_depth_texture
), VER(1,4), Y
, N
, N
, N
},
147 { GL(ARB_draw_buffers
), VER(0,0), Y
, N
, N
, N
},
148 { GL(ARB_fragment_program
), VER(0,0), Y
, N
, N
, N
},
149 { GL(ARB_fragment_program_shadow
), VER(0,0), Y
, N
, N
, N
},
150 { GL(ARB_framebuffer_object
), VER(0,0), Y
, N
, N
, N
},
151 { GL(ARB_imaging
), VER(0,0), Y
, N
, N
, N
},
152 { GL(ARB_multisample
), VER(1,3), Y
, N
, N
, N
},
153 { GL(ARB_multitexture
), VER(1,3), Y
, N
, N
, N
},
154 { GL(ARB_occlusion_query
), VER(1,5), Y
, N
, N
, N
},
155 { GL(ARB_point_parameters
), VER(1,4), Y
, N
, N
, N
},
156 { GL(ARB_point_sprite
), VER(0,0), Y
, N
, N
, N
},
157 { GL(ARB_shadow
), VER(1,4), Y
, N
, N
, N
},
158 { GL(ARB_shadow_ambient
), VER(0,0), Y
, N
, N
, N
},
159 { GL(ARB_texture_border_clamp
), VER(1,3), Y
, N
, N
, N
},
160 { GL(ARB_texture_compression
), VER(1,3), Y
, N
, N
, N
},
161 { GL(ARB_texture_cube_map
), VER(1,3), Y
, N
, N
, N
},
162 { GL(ARB_texture_env_add
), VER(1,3), Y
, N
, N
, N
},
163 { GL(ARB_texture_env_combine
), VER(1,3), Y
, N
, N
, N
},
164 { GL(ARB_texture_env_crossbar
), VER(1,4), Y
, N
, N
, N
},
165 { GL(ARB_texture_env_dot3
), VER(1,3), Y
, N
, N
, N
},
166 { GL(ARB_texture_mirrored_repeat
), VER(1,4), Y
, N
, N
, N
},
167 { GL(ARB_texture_non_power_of_two
), VER(1,5), Y
, N
, N
, N
},
168 { GL(ARB_texture_rectangle
), VER(0,0), Y
, N
, N
, N
},
169 { GL(ARB_texture_rg
), VER(0,0), Y
, N
, N
, N
},
170 { GL(ARB_transpose_matrix
), VER(1,3), Y
, N
, Y
, N
},
171 { GL(ARB_vertex_buffer_object
), VER(1,5), N
, N
, N
, N
},
172 { GL(ARB_vertex_program
), VER(0,0), Y
, N
, N
, N
},
173 { GL(ARB_window_pos
), VER(1,4), Y
, N
, N
, N
},
174 { GL(EXT_abgr
), VER(0,0), Y
, N
, N
, N
},
175 { GL(EXT_bgra
), VER(1,2), Y
, N
, N
, N
},
176 { GL(EXT_blend_color
), VER(1,4), Y
, N
, N
, N
},
177 { GL(EXT_blend_equation_separate
), VER(0,0), Y
, N
, N
, N
},
178 { GL(EXT_blend_func_separate
), VER(1,4), Y
, N
, N
, N
},
179 { GL(EXT_blend_logic_op
), VER(1,4), Y
, N
, N
, N
},
180 { GL(EXT_blend_minmax
), VER(1,4), Y
, N
, N
, N
},
181 { GL(EXT_blend_subtract
), VER(1,4), Y
, N
, N
, N
},
182 { GL(EXT_clip_volume_hint
), VER(0,0), Y
, N
, N
, N
},
183 { GL(EXT_compiled_vertex_array
), VER(0,0), N
, N
, N
, N
},
184 { GL(EXT_convolution
), VER(0,0), N
, N
, N
, N
},
185 { GL(EXT_copy_texture
), VER(1,1), Y
, N
, N
, N
},
186 { GL(EXT_cull_vertex
), VER(0,0), N
, N
, N
, N
},
187 { GL(EXT_depth_bounds_test
), VER(0,0), N
, N
, N
, N
},
188 { GL(EXT_draw_range_elements
), VER(1,2), Y
, N
, Y
, N
},
189 { GL(EXT_fog_coord
), VER(1,4), Y
, N
, N
, N
},
190 { GL(EXT_framebuffer_blit
), VER(0,0), Y
, N
, N
, N
},
191 { GL(EXT_framebuffer_multisample
), VER(0,0), Y
, N
, N
, N
},
192 { GL(EXT_framebuffer_object
), VER(0,0), Y
, N
, N
, N
},
193 { GL(EXT_multi_draw_arrays
), VER(1,4), Y
, N
, Y
, N
},
194 { GL(EXT_packed_depth_stencil
), VER(0,0), Y
, N
, N
, N
},
195 { GL(EXT_packed_pixels
), VER(1,2), Y
, N
, N
, N
},
196 { GL(EXT_paletted_texture
), VER(0,0), Y
, N
, N
, N
},
197 { GL(EXT_pixel_buffer_object
), VER(0,0), N
, N
, N
, N
},
198 { GL(EXT_point_parameters
), VER(1,4), Y
, N
, N
, N
},
199 { GL(EXT_polygon_offset
), VER(1,1), Y
, N
, N
, N
},
200 { GL(EXT_rescale_normal
), VER(1,2), Y
, N
, N
, N
},
201 { GL(EXT_secondary_color
), VER(1,4), Y
, N
, N
, N
},
202 { GL(EXT_separate_specular_color
), VER(1,2), Y
, N
, N
, N
},
203 { GL(EXT_shadow_funcs
), VER(1,5), Y
, N
, N
, N
},
204 { GL(EXT_shared_texture_palette
), VER(0,0), Y
, N
, N
, N
},
205 { GL(EXT_stencil_two_side
), VER(0,0), Y
, N
, N
, N
},
206 { GL(EXT_stencil_wrap
), VER(1,4), Y
, N
, N
, N
},
207 { GL(EXT_subtexture
), VER(1,1), Y
, N
, N
, N
},
208 { GL(EXT_texture
), VER(1,1), Y
, N
, N
, N
},
209 { GL(EXT_texture3D
), VER(1,2), Y
, N
, N
, N
},
210 { GL(EXT_texture_compression_dxt1
), VER(0,0), Y
, N
, N
, N
},
211 { GL(EXT_texture_compression_s3tc
), VER(0,0), Y
, N
, N
, N
},
212 { GL(EXT_texture_edge_clamp
), VER(1,2), Y
, N
, N
, N
},
213 { GL(EXT_texture_env_add
), VER(1,3), Y
, N
, N
, N
},
214 { GL(EXT_texture_env_combine
), VER(1,3), Y
, N
, N
, N
},
215 { GL(EXT_texture_env_dot3
), VER(0,0), Y
, N
, N
, N
},
216 { GL(EXT_texture_filter_anisotropic
), VER(0,0), Y
, N
, N
, N
},
217 { GL(EXT_texture_lod
), VER(1,2), Y
, N
, N
, N
},
218 { GL(EXT_texture_lod_bias
), VER(1,4), Y
, N
, N
, N
},
219 { GL(EXT_texture_mirror_clamp
), VER(0,0), Y
, N
, N
, N
},
220 { GL(EXT_texture_object
), VER(1,1), Y
, N
, N
, N
},
221 { GL(EXT_texture_rectangle
), VER(0,0), Y
, N
, N
, N
},
222 { GL(EXT_vertex_array
), VER(0,0), Y
, N
, N
, N
},
223 { GL(3DFX_texture_compression_FXT1
), VER(0,0), Y
, N
, N
, N
},
224 { GL(APPLE_packed_pixels
), VER(1,2), Y
, N
, N
, N
},
225 { GL(APPLE_ycbcr_422
), VER(0,0), Y
, N
, N
, N
},
226 { GL(ATI_draw_buffers
), VER(0,0), Y
, N
, N
, N
},
227 { GL(ATI_text_fragment_shader
), VER(0,0), Y
, N
, N
, N
},
228 { GL(ATI_texture_env_combine3
), VER(0,0), Y
, N
, N
, N
},
229 { GL(ATI_texture_float
), VER(0,0), Y
, N
, N
, N
},
230 { GL(ATI_texture_mirror_once
), VER(0,0), Y
, N
, N
, N
},
231 { GL(ATIX_texture_env_combine3
), VER(0,0), Y
, N
, N
, N
},
232 { GL(HP_convolution_border_modes
), VER(0,0), Y
, N
, N
, N
},
233 { GL(HP_occlusion_test
), VER(0,0), Y
, N
, N
, N
},
234 { GL(IBM_cull_vertex
), VER(0,0), Y
, N
, N
, N
},
235 { GL(IBM_pixel_filter_hint
), VER(0,0), Y
, N
, N
, N
},
236 { GL(IBM_rasterpos_clip
), VER(0,0), Y
, N
, N
, N
},
237 { GL(IBM_texture_clamp_nodraw
), VER(0,0), Y
, N
, N
, N
},
238 { GL(IBM_texture_mirrored_repeat
), VER(0,0), Y
, N
, N
, N
},
239 { GL(INGR_blend_func_separate
), VER(0,0), Y
, N
, N
, N
},
240 { GL(INGR_interlace_read
), VER(0,0), Y
, N
, N
, N
},
241 { GL(MESA_pack_invert
), VER(0,0), Y
, N
, N
, N
},
242 { GL(MESA_ycbcr_texture
), VER(0,0), Y
, N
, N
, N
},
243 { GL(NV_blend_square
), VER(1,4), Y
, N
, N
, N
},
244 { GL(NV_copy_depth_to_color
), VER(0,0), Y
, N
, N
, N
},
245 { GL(NV_depth_clamp
), VER(0,0), Y
, N
, N
, N
},
246 { GL(NV_fog_distance
), VER(0,0), Y
, N
, N
, N
},
247 { GL(NV_fragment_program
), VER(0,0), Y
, N
, N
, N
},
248 { GL(NV_fragment_program_option
), VER(0,0), Y
, N
, N
, N
},
249 { GL(NV_fragment_program2
), VER(0,0), Y
, N
, N
, N
},
250 { GL(NV_light_max_exponent
), VER(0,0), Y
, N
, N
, N
},
251 { GL(NV_multisample_filter_hint
), VER(0,0), Y
, N
, N
, N
},
252 { GL(NV_packed_depth_stencil
), VER(0,0), Y
, N
, N
, N
},
253 { GL(NV_point_sprite
), VER(0,0), Y
, N
, N
, N
},
254 { GL(NV_texgen_reflection
), VER(0,0), Y
, N
, N
, N
},
255 { GL(NV_texture_compression_vtc
), VER(0,0), Y
, N
, N
, N
},
256 { GL(NV_texture_env_combine4
), VER(0,0), Y
, N
, N
, N
},
257 { GL(NV_texture_rectangle
), VER(0,0), Y
, N
, N
, N
},
258 { GL(NV_vertex_program
), VER(0,0), Y
, N
, N
, N
},
259 { GL(NV_vertex_program1_1
), VER(0,0), Y
, N
, N
, N
},
260 { GL(NV_vertex_program2
), VER(0,0), Y
, N
, N
, N
},
261 { GL(NV_vertex_program2_option
), VER(0,0), Y
, N
, N
, N
},
262 { GL(NV_vertex_program3
), VER(0,0), Y
, N
, N
, N
},
263 { GL(OES_read_format
), VER(0,0), Y
, N
, N
, N
},
264 { GL(OES_compressed_paletted_texture
),VER(0,0), Y
, N
, N
, N
},
265 { GL(SGI_color_matrix
), VER(0,0), Y
, N
, N
, N
},
266 { GL(SGI_color_table
), VER(0,0), Y
, N
, N
, N
},
267 { GL(SGI_texture_color_table
), VER(0,0), Y
, N
, N
, N
},
268 { GL(SGIS_generate_mipmap
), VER(1,4), Y
, N
, N
, N
},
269 { GL(SGIS_multisample
), VER(0,0), Y
, N
, N
, N
},
270 { GL(SGIS_texture_border_clamp
), VER(1,3), Y
, N
, N
, N
},
271 { GL(SGIS_texture_edge_clamp
), VER(1,2), Y
, N
, N
, N
},
272 { GL(SGIS_texture_lod
), VER(1,2), Y
, N
, N
, N
},
273 { GL(SGIX_blend_alpha_minmax
), VER(0,0), Y
, N
, N
, N
},
274 { GL(SGIX_clipmap
), VER(0,0), Y
, N
, N
, N
},
275 { GL(SGIX_depth_texture
), VER(0,0), Y
, N
, N
, N
},
276 { GL(SGIX_fog_offset
), VER(0,0), Y
, N
, N
, N
},
277 { GL(SGIX_shadow
), VER(0,0), Y
, N
, N
, N
},
278 { GL(SGIX_shadow_ambient
), VER(0,0), Y
, N
, N
, N
},
279 { GL(SGIX_texture_coordinate_clamp
), VER(0,0), Y
, N
, N
, N
},
280 { GL(SGIX_texture_lod_bias
), VER(0,0), Y
, N
, N
, N
},
281 { GL(SGIX_texture_range
), VER(0,0), Y
, N
, N
, N
},
282 { GL(SGIX_texture_scale_bias
), VER(0,0), Y
, N
, N
, N
},
283 { GL(SGIX_vertex_preclip
), VER(0,0), Y
, N
, N
, N
},
284 { GL(SGIX_vertex_preclip_hint
), VER(0,0), Y
, N
, N
, N
},
285 { GL(SGIX_ycrcb
), VER(0,0), Y
, N
, N
, N
},
286 { GL(SUN_convolution_border_modes
), VER(0,0), Y
, N
, N
, N
},
287 { GL(SUN_multi_draw_arrays
), VER(0,0), Y
, N
, Y
, N
},
288 { GL(SUN_slice_accum
), VER(0,0), Y
, N
, N
, N
},
294 /* global bit-fields of available extensions and their characteristics */
295 static unsigned char client_glx_support
[8];
296 static unsigned char client_glx_only
[8];
297 static unsigned char direct_glx_only
[8];
298 static unsigned char client_gl_support
[__GL_EXT_BYTES
];
299 static unsigned char client_gl_only
[__GL_EXT_BYTES
];
302 * Bits representing the set of extensions that are enabled by default in all
303 * direct rendering drivers.
305 static unsigned char direct_glx_support
[8];
308 * Highest core GL version that can be supported for indirect rendering.
310 static const unsigned gl_major
= 1;
311 static const unsigned gl_minor
= 4;
313 /* client extensions string */
314 static const char *__glXGLXClientExtensions
= NULL
;
316 static void __glXExtensionsCtr(void);
317 static void __glXExtensionsCtrScreen(struct glx_screen
* psc
);
318 static void __glXProcessServerString(const struct extension_info
*ext
,
319 const char *server_string
,
320 unsigned char *server_support
);
323 * Set the state of a GLX extension.
325 * \param name Name of the extension.
326 * \param name_len Length, in characters, of the extension name.
327 * \param state New state (either enabled or disabled) of the extension.
328 * \param supported Table in which the state of the extension is to be set.
331 set_glx_extension(const struct extension_info
*ext
,
332 const char *name
, unsigned name_len
, GLboolean state
,
333 unsigned char *supported
)
338 for (i
= 0; ext
[i
].name
!= NULL
; i
++) {
339 if ((name_len
== ext
[i
].name_len
)
340 && (strncmp(ext
[i
].name
, name
, name_len
) == 0)) {
342 SET_BIT(supported
, ext
[i
].bit
);
345 CLR_BIT(supported
, ext
[i
].bit
);
355 #define SEPARATOR ' '
358 * Convert the server's extension string to a bit-field.
360 * \param server_string GLX extension string from the server.
361 * \param server_support Bit-field of supported extensions.
364 * This function is used to process both GLX and GL extension strings. The
365 * bit-fields used to track each of these have different sizes. Therefore,
366 * the data pointed by \c server_support must be preinitialized to zero.
369 __glXProcessServerString(const struct extension_info
*ext
,
370 const char *server_string
,
371 unsigned char *server_support
)
376 for (base
= 0; server_string
[base
] != NUL
; /* empty */ ) {
377 /* Determine the length of the next extension name.
379 for (len
= 0; (server_string
[base
+ len
] != SEPARATOR
)
380 && (server_string
[base
+ len
] != NUL
); len
++) {
384 /* Set the bit for the extension in the server_support table.
386 set_glx_extension(ext
, &server_string
[base
], len
, GL_TRUE
,
390 /* Advance to the next extension string. This means that we skip
391 * over the previous string and any trialing white-space.
393 for (base
+= len
; (server_string
[base
] == SEPARATOR
)
394 && (server_string
[base
] != NUL
); base
++) {
401 __glXEnableDirectExtension(struct glx_screen
* psc
, const char *name
)
403 __glXExtensionsCtr();
404 __glXExtensionsCtrScreen(psc
);
406 set_glx_extension(known_glx_extensions
,
407 name
, strlen(name
), GL_TRUE
, psc
->direct_support
);
411 * Initialize global extension support tables.
415 __glXExtensionsCtr(void)
418 static GLboolean ext_list_first_time
= GL_TRUE
;
421 if (ext_list_first_time
) {
422 ext_list_first_time
= GL_FALSE
;
424 (void) memset(client_glx_support
, 0, sizeof(client_glx_support
));
425 (void) memset(direct_glx_support
, 0, sizeof(direct_glx_support
));
426 (void) memset(client_glx_only
, 0, sizeof(client_glx_only
));
427 (void) memset(direct_glx_only
, 0, sizeof(direct_glx_only
));
429 (void) memset(client_gl_support
, 0, sizeof(client_gl_support
));
430 (void) memset(client_gl_only
, 0, sizeof(client_gl_only
));
432 for (i
= 0; known_glx_extensions
[i
].name
!= NULL
; i
++) {
433 const unsigned bit
= known_glx_extensions
[i
].bit
;
435 if (known_glx_extensions
[i
].client_support
) {
436 SET_BIT(client_glx_support
, bit
);
439 if (known_glx_extensions
[i
].direct_support
) {
440 SET_BIT(direct_glx_support
, bit
);
443 if (known_glx_extensions
[i
].client_only
) {
444 SET_BIT(client_glx_only
, bit
);
447 if (known_glx_extensions
[i
].direct_only
) {
448 SET_BIT(direct_glx_only
, bit
);
452 for (i
= 0; known_gl_extensions
[i
].name
!= NULL
; i
++) {
453 const unsigned bit
= known_gl_extensions
[i
].bit
;
455 if (known_gl_extensions
[i
].client_support
) {
456 SET_BIT(client_gl_support
, bit
);
459 if (known_gl_extensions
[i
].client_only
) {
460 SET_BIT(client_gl_only
, bit
);
465 fprintf(stderr
, "[%s:%u] Maximum client library version: %u.%u\n",
466 __func__
, __LINE__
, gl_major
, gl_minor
);
473 * Make sure that per-screen direct-support table is initialized.
475 * \param psc Pointer to GLX per-screen record.
479 __glXExtensionsCtrScreen(struct glx_screen
* psc
)
481 if (psc
->ext_list_first_time
) {
482 psc
->ext_list_first_time
= GL_FALSE
;
483 (void) memcpy(psc
->direct_support
, direct_glx_support
,
484 sizeof(direct_glx_support
));
490 * Check if a certain extension is enabled on a given screen.
492 * \param psc Pointer to GLX per-screen record.
493 * \param bit Bit index in the direct-support table.
494 * \returns If the extension bit is enabled for the screen, \c GL_TRUE is
495 * returned. If the extension bit is not enabled or if \c psc is
496 * \c NULL, then \c GL_FALSE is returned.
499 __glXExtensionBitIsEnabled(struct glx_screen
* psc
, unsigned bit
)
501 GLboolean enabled
= GL_FALSE
;
504 __glXExtensionsCtr();
505 __glXExtensionsCtrScreen(psc
);
506 enabled
= EXT_ENABLED(bit
, psc
->direct_support
);
514 * Check if a certain extension is enabled in a given context.
518 __glExtensionBitIsEnabled(struct glx_context
*gc
, unsigned bit
)
520 GLboolean enabled
= GL_FALSE
;
523 enabled
= EXT_ENABLED(bit
, gc
->gl_extension_bits
);
532 * Convert a bit-field to a string of supported extensions.
535 __glXGetStringFromTable(const struct extension_info
*ext
,
536 const unsigned char *supported
)
539 unsigned ext_str_len
;
545 for (i
= 0; ext
[i
].name
!= NULL
; i
++) {
546 if (EXT_ENABLED(ext
[i
].bit
, supported
)) {
547 ext_str_len
+= ext
[i
].name_len
+ 1;
551 ext_str
= Xmalloc(ext_str_len
+ 1);
552 if (ext_str
!= NULL
) {
555 for (i
= 0; ext
[i
].name
!= NULL
; i
++) {
556 if (EXT_ENABLED(ext
[i
].bit
, supported
)) {
557 (void) memcpy(point
, ext
[i
].name
, ext
[i
].name_len
);
558 point
+= ext
[i
].name_len
;
573 * Get the string of client library supported extensions.
576 __glXGetClientExtensions(void)
578 if (__glXGLXClientExtensions
== NULL
) {
579 __glXExtensionsCtr();
580 __glXGLXClientExtensions
= __glXGetStringFromTable(known_glx_extensions
,
584 return __glXGLXClientExtensions
;
589 * Calculate the list of application usable extensions. The resulting
590 * string is stored in \c psc->effectiveGLXexts.
592 * \param psc Pointer to GLX per-screen record.
593 * \param display_is_direct_capable True if the display is capable of
595 * \param minor_version GLX minor version from the server.
599 __glXCalculateUsableExtensions(struct glx_screen
* psc
,
600 GLboolean display_is_direct_capable
,
603 unsigned char server_support
[8];
604 unsigned char usable
[8];
607 __glXExtensionsCtr();
608 __glXExtensionsCtrScreen(psc
);
610 (void) memset(server_support
, 0, sizeof(server_support
));
611 __glXProcessServerString(known_glx_extensions
,
612 psc
->serverGLXexts
, server_support
);
615 /* This is a hack. Some servers support GLX 1.3 but don't export
616 * all of the extensions implied by GLX 1.3. If the server claims
617 * support for GLX 1.3, enable support for the extensions that can be
618 * "emulated" as well.
621 if (minor_version
>= 3) {
622 SET_BIT(server_support
, EXT_visual_info_bit
);
623 SET_BIT(server_support
, EXT_visual_rating_bit
);
624 SET_BIT(server_support
, SGI_make_current_read_bit
);
625 SET_BIT(server_support
, SGIX_fbconfig_bit
);
626 SET_BIT(server_support
, SGIX_pbuffer_bit
);
628 /* This one is a little iffy. GLX 1.3 doesn't incorporate all of this
629 * extension. However, the only part that is not strictly client-side
630 * is shared. That's the glXQueryContext / glXQueryContextInfoEXT
634 SET_BIT(server_support
, EXT_import_context_bit
);
638 /* An extension is supported if the client-side (i.e., libGL) supports
639 * it and the "server" supports it. In this case that means that either
640 * the true server supports it or it is only for direct-rendering and
641 * the direct rendering driver supports it.
643 * If the display is not capable of direct rendering, then the extension
644 * is enabled if and only if the client-side library and the server
648 if (display_is_direct_capable
) {
649 for (i
= 0; i
< 8; i
++) {
650 usable
[i
] = (client_glx_support
[i
] & client_glx_only
[i
])
651 | (client_glx_support
[i
] & psc
->direct_support
[i
] &
653 | (client_glx_support
[i
] & psc
->direct_support
[i
] &
658 for (i
= 0; i
< 8; i
++) {
659 usable
[i
] = (client_glx_support
[i
] & client_glx_only
[i
])
660 | (client_glx_support
[i
] & server_support
[i
]);
664 psc
->effectiveGLXexts
= __glXGetStringFromTable(known_glx_extensions
,
670 * Calculate the list of application usable extensions. The resulting
671 * string is stored in \c gc->extensions.
673 * \param gc Pointer to GLX context.
674 * \param server_string Extension string from the server.
675 * \param major_version GL major version from the server.
676 * \param minor_version GL minor version from the server.
680 __glXCalculateUsableGLExtensions(struct glx_context
* gc
,
681 const char *server_string
,
682 int major_version
, int minor_version
)
684 unsigned char server_support
[__GL_EXT_BYTES
];
685 unsigned char usable
[__GL_EXT_BYTES
];
689 __glXExtensionsCtr();
691 (void) memset(server_support
, 0, sizeof(server_support
));
692 __glXProcessServerString(known_gl_extensions
, server_string
,
696 /* Handle lazy servers that don't export all the extensions strings that
697 * are part of the GL core version that they support.
700 for (i
= 0; i
< __GL_EXT_BYTES
; i
++) {
701 if ((known_gl_extensions
[i
].version_major
!= 0)
702 && ((major_version
> known_gl_extensions
[i
].version_major
)
703 || ((major_version
== known_gl_extensions
[i
].version_major
)
705 known_gl_extensions
[i
].version_minor
)))) {
706 SET_BIT(server_support
, known_gl_extensions
[i
].bit
);
711 /* An extension is supported if the client-side (i.e., libGL) supports
712 * it and the server supports it or the client-side library supports it
713 * and it only needs client-side support.
716 for (i
= 0; i
< __GL_EXT_BYTES
; i
++) {
717 usable
[i
] = (client_gl_support
[i
] & client_gl_only
[i
])
718 | (client_gl_support
[i
] & server_support
[i
]);
721 gc
->extensions
= (unsigned char *)
722 __glXGetStringFromTable(known_gl_extensions
, usable
);
723 (void) memcpy(gc
->gl_extension_bits
, usable
, sizeof(usable
));
728 * Calculates the maximum core GL version that can be supported for indirect
732 __glXGetGLVersion(int *major_version
, int *minor_version
)
734 __glXExtensionsCtr();
735 *major_version
= gl_major
;
736 *minor_version
= gl_minor
;
741 * Get a string representing the set of extensions supported by the client
742 * library. This is currently only used to send the list of extensions
743 * supported by the client to the server.
746 __glXGetClientGLExtensionString(void)
748 __glXExtensionsCtr();
749 return __glXGetStringFromTable(known_gl_extensions
, client_gl_support
);