| /* |
| * (C) Copyright IBM Corporation 2002, 2004 |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * on the rights to use, copy, modify, merge, publish, distribute, sub |
| * license, and/or sell copies of the Software, and to permit persons to whom |
| * the Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /** |
| * \file glxextensions.c |
| * |
| * \author Ian Romanick <idr@us.ibm.com> |
| */ |
| |
| #include "glxclient.h" |
| #include <X11/extensions/extutil.h> |
| #include <X11/extensions/Xext.h> |
| #include <string.h> |
| #include "glapi.h" |
| #include "glxextensions.h" |
| #include "simple_list.h" |
| |
| #define SET_BIT(m,b) (m[ (b) / 8 ] |= (1U << ((b) % 8))) |
| #define CLR_BIT(m,b) (m[ (b) / 8 ] &= ~(1U << ((b) % 8))) |
| #define IS_SET(m,b) ((m[ (b) / 8 ] & (1U << ((b) % 8))) != 0) |
| #define CONCAT(a,b) a ## b |
| #define GLX(n) "GLX_" # n, 4 + sizeof( # n ) - 1, CONCAT(n,_bit) |
| #define GL(n) "GL_" # n, 3 + sizeof( # n ) - 1, GL_ ## n ## _bit |
| #define VER(a,b) a, b |
| #define Y 1 |
| #define N 0 |
| #define EXT_ENABLED(bit,supported) (IS_SET( supported, bit )) |
| |
| |
| struct extension_info { |
| const char * const name; |
| unsigned name_len; |
| |
| unsigned char bit; |
| |
| /* This is the lowest version of GLX that "requires" this extension. |
| * For example, GLX 1.3 requires SGIX_fbconfig, SGIX_pbuffer, and |
| * SGI_make_current_read. If the extension is not required by any known |
| * version of GLX, use 0, 0. |
| */ |
| unsigned char version_major; |
| unsigned char version_minor; |
| unsigned char client_support; |
| unsigned char direct_support; |
| unsigned char client_only; /** Is the extension client-side only? */ |
| unsigned char direct_only; /** Is the extension for direct |
| * contexts only? |
| */ |
| }; |
| |
| static const struct extension_info known_glx_extensions[] = { |
| { GLX(ARB_get_proc_address), VER(1,4), Y, N, Y, N }, |
| { GLX(ARB_multisample), VER(1,4), Y, Y, N, N }, |
| { GLX(ARB_render_texture), VER(0,0), N, N, N, N }, |
| { GLX(ATI_pixel_format_float), VER(0,0), N, N, N, N }, |
| { GLX(EXT_import_context), VER(0,0), Y, Y, N, N }, |
| { GLX(EXT_visual_info), VER(0,0), Y, Y, N, N }, |
| { GLX(EXT_visual_rating), VER(0,0), Y, Y, N, N }, |
| { GLX(MESA_agp_offset), VER(0,0), N, N, N, Y }, /* Deprecated */ |
| { GLX(MESA_allocate_memory), VER(0,0), Y, N, N, Y }, |
| { GLX(MESA_copy_sub_buffer), VER(0,0), Y, N, N, N }, |
| { GLX(MESA_pixmap_colormap), VER(0,0), N, N, N, N }, /* Deprecated */ |
| { GLX(MESA_release_buffers), VER(0,0), N, N, N, N }, /* Deprecated */ |
| { GLX(MESA_swap_control), VER(0,0), Y, N, N, Y }, |
| { GLX(MESA_swap_frame_usage), VER(0,0), Y, N, N, Y }, |
| { GLX(NV_float_buffer), VER(0,0), N, N, N, N }, |
| { GLX(NV_render_depth_texture), VER(0,0), N, N, N, N }, |
| { GLX(NV_render_texture_rectangle), VER(0,0), N, N, N, N }, |
| { GLX(NV_vertex_array_range), VER(0,0), N, N, N, Y }, /* Deprecated */ |
| { GLX(OML_swap_method), VER(0,0), Y, Y, N, N }, |
| { GLX(OML_sync_control), VER(0,0), Y, N, N, Y }, |
| { GLX(SGI_make_current_read), VER(1,3), Y, N, N, N }, |
| { GLX(SGI_swap_control), VER(0,0), Y, N, N, N }, |
| { GLX(SGI_video_sync), VER(0,0), Y, N, N, Y }, |
| { GLX(SGIS_blended_overlay), VER(0,0), N, N, N, N }, |
| { GLX(SGIS_color_range), VER(0,0), N, N, N, N }, |
| { GLX(SGIS_multisample), VER(0,0), Y, Y, N, N }, |
| { GLX(SGIX_fbconfig), VER(1,3), Y, Y, N, N }, |
| { GLX(SGIX_pbuffer), VER(1,3), Y, N, N, N }, |
| { GLX(SGIX_swap_barrier), VER(0,0), N, N, N, N }, |
| { GLX(SGIX_swap_group), VER(0,0), N, N, N, N }, |
| { GLX(SGIX_visual_select_group), VER(0,0), Y, Y, N, N }, |
| { GLX(EXT_texture_from_pixmap), VER(0,0), Y, N, N, N }, |
| { NULL } |
| }; |
| |
| static const struct extension_info known_gl_extensions[] = { |
| { GL(ARB_depth_texture), VER(1,4), Y, N, N, N }, |
| { GL(ARB_draw_buffers), VER(0,0), Y, N, N, N }, |
| { GL(ARB_fragment_program), VER(0,0), Y, N, N, N }, |
| { GL(ARB_fragment_program_shadow), VER(0,0), Y, N, N, N }, |
| { GL(ARB_imaging), VER(0,0), Y, N, N, N }, |
| { GL(ARB_multisample), VER(1,3), Y, N, N, N }, |
| { GL(ARB_multitexture), VER(1,3), Y, N, N, N }, |
| { GL(ARB_occlusion_query), VER(1,5), Y, N, N, N }, |
| { GL(ARB_point_parameters), VER(1,4), Y, N, N, N }, |
| { GL(ARB_point_sprite), VER(0,0), Y, N, N, N }, |
| { GL(ARB_shadow), VER(1,4), Y, N, N, N }, |
| { GL(ARB_shadow_ambient), VER(0,0), Y, N, N, N }, |
| { GL(ARB_texture_border_clamp), VER(1,3), Y, N, N, N }, |
| { GL(ARB_texture_compression), VER(1,3), Y, N, N, N }, |
| { GL(ARB_texture_cube_map), VER(1,3), Y, N, N, N }, |
| { GL(ARB_texture_env_add), VER(1,3), Y, N, N, N }, |
| { GL(ARB_texture_env_combine), VER(1,3), Y, N, N, N }, |
| { GL(ARB_texture_env_crossbar), VER(1,4), Y, N, N, N }, |
| { GL(ARB_texture_env_dot3), VER(1,3), Y, N, N, N }, |
| { GL(ARB_texture_mirrored_repeat), VER(1,4), Y, N, N, N }, |
| { GL(ARB_texture_non_power_of_two), VER(1,5), Y, N, N, N }, |
| { GL(ARB_texture_rectangle), VER(0,0), Y, N, N, N }, |
| { GL(ARB_transpose_matrix), VER(1,3), Y, N, Y, N }, |
| { GL(ARB_vertex_buffer_object), VER(1,5), N, N, N, N }, |
| { GL(ARB_vertex_program), VER(0,0), Y, N, N, N }, |
| { GL(ARB_window_pos), VER(1,4), Y, N, N, N }, |
| { GL(EXT_abgr), VER(0,0), Y, N, N, N }, |
| { GL(EXT_bgra), VER(1,2), Y, N, N, N }, |
| { GL(EXT_blend_color), VER(1,4), Y, N, N, N }, |
| { GL(EXT_blend_equation_separate), VER(0,0), Y, N, N, N }, |
| { GL(EXT_blend_func_separate), VER(1,4), Y, N, N, N }, |
| { GL(EXT_blend_logic_op), VER(1,4), Y, N, N, N }, |
| { GL(EXT_blend_minmax), VER(1,4), Y, N, N, N }, |
| { GL(EXT_blend_subtract), VER(1,4), Y, N, N, N }, |
| { GL(EXT_clip_volume_hint), VER(0,0), Y, N, N, N }, |
| { GL(EXT_compiled_vertex_array), VER(0,0), N, N, N, N }, |
| { GL(EXT_convolution), VER(0,0), N, N, N, N }, |
| { GL(EXT_copy_texture), VER(1,1), Y, N, N, N }, |
| { GL(EXT_cull_vertex), VER(0,0), N, N, N, N }, |
| { GL(EXT_depth_bounds_test), VER(0,0), N, N, N, N }, |
| { GL(EXT_draw_range_elements), VER(1,2), Y, N, Y, N }, |
| { GL(EXT_fog_coord), VER(1,4), Y, N, N, N }, |
| { GL(EXT_framebuffer_object), VER(0,0), Y, N, N, N }, |
| { GL(EXT_multi_draw_arrays), VER(1,4), Y, N, Y, N }, |
| { GL(EXT_packed_pixels), VER(1,2), Y, N, N, N }, |
| { GL(EXT_paletted_texture), VER(0,0), Y, N, N, N }, |
| { GL(EXT_pixel_buffer_object), VER(0,0), N, N, N, N }, |
| { GL(EXT_point_parameters), VER(1,4), Y, N, N, N }, |
| { GL(EXT_polygon_offset), VER(1,1), Y, N, N, N }, |
| { GL(EXT_rescale_normal), VER(1,2), Y, N, N, N }, |
| { GL(EXT_secondary_color), VER(1,4), Y, N, N, N }, |
| { GL(EXT_separate_specular_color), VER(1,2), Y, N, N, N }, |
| { GL(EXT_shadow_funcs), VER(1,5), Y, N, N, N }, |
| { GL(EXT_shared_texture_palette), VER(0,0), Y, N, N, N }, |
| { GL(EXT_stencil_two_side), VER(0,0), Y, N, N, N }, |
| { GL(EXT_stencil_wrap), VER(1,4), Y, N, N, N }, |
| { GL(EXT_subtexture), VER(1,1), Y, N, N, N }, |
| { GL(EXT_texture), VER(1,1), Y, N, N, N }, |
| { GL(EXT_texture3D), VER(1,2), Y, N, N, N }, |
| { GL(EXT_texture_compression_dxt1), VER(0,0), Y, N, N, N }, |
| { GL(EXT_texture_compression_s3tc), VER(0,0), Y, N, N, N }, |
| { GL(EXT_texture_edge_clamp), VER(1,2), Y, N, N, N }, |
| { GL(EXT_texture_env_add), VER(1,3), Y, N, N, N }, |
| { GL(EXT_texture_env_combine), VER(1,3), Y, N, N, N }, |
| { GL(EXT_texture_env_dot3), VER(0,0), Y, N, N, N }, |
| { GL(EXT_texture_filter_anisotropic), VER(0,0), Y, N, N, N }, |
| { GL(EXT_texture_lod), VER(1,2), Y, N, N, N }, |
| { GL(EXT_texture_lod_bias), VER(1,4), Y, N, N, N }, |
| { GL(EXT_texture_mirror_clamp), VER(0,0), Y, N, N, N }, |
| { GL(EXT_texture_object), VER(1,1), Y, N, N, N }, |
| { GL(EXT_texture_rectangle), VER(0,0), Y, N, N, N }, |
| { GL(EXT_vertex_array), VER(0,0), Y, N, N, N }, |
| { GL(3DFX_texture_compression_FXT1), VER(0,0), Y, N, N, N }, |
| { GL(APPLE_packed_pixels), VER(1,2), Y, N, N, N }, |
| { GL(APPLE_ycbcr_422), VER(0,0), Y, N, N, N }, |
| { GL(ATI_draw_buffers), VER(0,0), Y, N, N, N }, |
| { GL(ATI_text_fragment_shader), VER(0,0), Y, N, N, N }, |
| { GL(ATI_texture_env_combine3), VER(0,0), Y, N, N, N }, |
| { GL(ATI_texture_float), VER(0,0), Y, N, N, N }, |
| { GL(ATI_texture_mirror_once), VER(0,0), Y, N, N, N }, |
| { GL(ATIX_texture_env_combine3), VER(0,0), Y, N, N, N }, |
| { GL(HP_convolution_border_modes), VER(0,0), Y, N, N, N }, |
| { GL(HP_occlusion_test), VER(0,0), Y, N, N, N }, |
| { GL(IBM_cull_vertex), VER(0,0), Y, N, N, N }, |
| { GL(IBM_pixel_filter_hint), VER(0,0), Y, N, N, N }, |
| { GL(IBM_rasterpos_clip), VER(0,0), Y, N, N, N }, |
| { GL(IBM_texture_clamp_nodraw), VER(0,0), Y, N, N, N }, |
| { GL(IBM_texture_mirrored_repeat), VER(0,0), Y, N, N, N }, |
| { GL(INGR_blend_func_separate), VER(0,0), Y, N, N, N }, |
| { GL(INGR_interlace_read), VER(0,0), Y, N, N, N }, |
| { GL(MESA_pack_invert), VER(0,0), Y, N, N, N }, |
| { GL(MESA_ycbcr_texture), VER(0,0), Y, N, N, N }, |
| { GL(NV_blend_square), VER(1,4), Y, N, N, N }, |
| { GL(NV_copy_depth_to_color), VER(0,0), Y, N, N, N }, |
| { GL(NV_depth_clamp), VER(0,0), Y, N, N, N }, |
| { GL(NV_fog_distance), VER(0,0), Y, N, N, N }, |
| { GL(NV_fragment_program), VER(0,0), Y, N, N, N }, |
| { GL(NV_fragment_program_option), VER(0,0), Y, N, N, N }, |
| { GL(NV_fragment_program2), VER(0,0), Y, N, N, N }, |
| { GL(NV_light_max_exponent), VER(0,0), Y, N, N, N }, |
| { GL(NV_multisample_filter_hint), VER(0,0), Y, N, N, N }, |
| { GL(NV_point_sprite), VER(0,0), Y, N, N, N }, |
| { GL(NV_texgen_reflection), VER(0,0), Y, N, N, N }, |
| { GL(NV_texture_compression_vtc), VER(0,0), Y, N, N, N }, |
| { GL(NV_texture_env_combine4), VER(0,0), Y, N, N, N }, |
| { GL(NV_texture_rectangle), VER(0,0), Y, N, N, N }, |
| { GL(NV_vertex_program), VER(0,0), Y, N, N, N }, |
| { GL(NV_vertex_program1_1), VER(0,0), Y, N, N, N }, |
| { GL(NV_vertex_program2), VER(0,0), Y, N, N, N }, |
| { GL(NV_vertex_program2_option), VER(0,0), Y, N, N, N }, |
| { GL(NV_vertex_program3), VER(0,0), Y, N, N, N }, |
| { GL(OES_read_format), VER(0,0), Y, N, N, N }, |
| { GL(OES_compressed_paletted_texture),VER(0,0), Y, N, N, N }, |
| { GL(SGI_color_matrix), VER(0,0), Y, N, N, N }, |
| { GL(SGI_color_table), VER(0,0), Y, N, N, N }, |
| { GL(SGI_texture_color_table), VER(0,0), Y, N, N, N }, |
| { GL(SGIS_generate_mipmap), VER(1,4), Y, N, N, N }, |
| { GL(SGIS_multisample), VER(0,0), Y, N, N, N }, |
| { GL(SGIS_texture_border_clamp), VER(1,3), Y, N, N, N }, |
| { GL(SGIS_texture_edge_clamp), VER(1,2), Y, N, N, N }, |
| { GL(SGIS_texture_lod), VER(1,2), Y, N, N, N }, |
| { GL(SGIX_blend_alpha_minmax), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_clipmap), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_depth_texture), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_fog_offset), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_shadow), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_shadow_ambient), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_texture_coordinate_clamp), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_texture_lod_bias), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_texture_range), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_texture_scale_bias), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_vertex_preclip), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_vertex_preclip_hint), VER(0,0), Y, N, N, N }, |
| { GL(SGIX_ycrcb), VER(0,0), Y, N, N, N }, |
| { GL(SUN_convolution_border_modes), VER(0,0), Y, N, N, N }, |
| { GL(SUN_multi_draw_arrays), VER(0,0), Y, N, Y, N }, |
| { GL(SUN_slice_accum), VER(0,0), Y, N, N, N }, |
| { NULL } |
| }; |
| |
| |
| /* global bit-fields of available extensions and their characteristics */ |
| static unsigned char client_glx_support[8]; |
| static unsigned char client_glx_only[8]; |
| static unsigned char direct_glx_only[8]; |
| static unsigned char client_gl_support[ __GL_EXT_BYTES ]; |
| static unsigned char client_gl_only[ __GL_EXT_BYTES ]; |
| |
| /** |
| * Bits representing the set of extensions that are enabled by default in all |
| * direct rendering drivers. |
| */ |
| static unsigned char direct_glx_support[8]; |
| |
| /** |
| * Highest core GL version that can be supported for indirect rendering. |
| */ |
| static const unsigned gl_major = 1; |
| static const unsigned gl_minor = 4; |
| |
| /* client extensions string */ |
| static const char * __glXGLXClientExtensions = NULL; |
| |
| static void __glXExtensionsCtr( void ); |
| static void __glXExtensionsCtrScreen( __GLXscreenConfigs *psc ); |
| static void __glXProcessServerString( const struct extension_info * ext, |
| const char * server_string, unsigned char * server_support ); |
| |
| /** |
| * Set the state of a GLX extension. |
| * |
| * \param name Name of the extension. |
| * \param name_len Length, in characters, of the extension name. |
| * \param state New state (either enabled or disabled) of the extension. |
| * \param supported Table in which the state of the extension is to be set. |
| */ |
| static void |
| set_glx_extension( const struct extension_info * ext, |
| const char * name, unsigned name_len, GLboolean state, |
| unsigned char * supported ) |
| { |
| unsigned i; |
| |
| |
| for ( i = 0 ; ext[i].name != NULL ; i++ ) { |
| if ( (name_len == ext[i].name_len) |
| && (strncmp( ext[i].name, name, name_len ) == 0) ) { |
| if ( state ) { |
| SET_BIT( supported, ext[i].bit ); |
| } |
| else { |
| CLR_BIT( supported, ext[i].bit ); |
| } |
| |
| return; |
| } |
| } |
| } |
| |
| |
| #define NUL '\0' |
| #define SEPARATOR ' ' |
| |
| /** |
| * Convert the server's extension string to a bit-field. |
| * |
| * \param server_string GLX extension string from the server. |
| * \param server_support Bit-field of supported extensions. |
| * |
| * \note |
| * This function is used to process both GLX and GL extension strings. The |
| * bit-fields used to track each of these have different sizes. Therefore, |
| * the data pointed by \c server_support must be preinitialized to zero. |
| */ |
| static void |
| __glXProcessServerString( const struct extension_info * ext, |
| const char * server_string, |
| unsigned char * server_support ) |
| { |
| unsigned base; |
| unsigned len; |
| |
| for ( base = 0 ; server_string[ base ] != NUL ; /* empty */ ) { |
| /* Determine the length of the next extension name. |
| */ |
| for ( len = 0 |
| ; (server_string[ base + len ] != SEPARATOR) |
| && (server_string[ base + len ] != NUL) |
| ; len++ ) { |
| /* empty */ |
| } |
| |
| /* Set the bit for the extension in the server_support table. |
| */ |
| set_glx_extension( ext, & server_string[ base ], len, GL_TRUE, |
| server_support ); |
| |
| |
| /* Advance to the next extension string. This means that we skip |
| * over the previous string and any trialing white-space. |
| */ |
| for ( base += len ; |
| (server_string[ base ] == SEPARATOR) |
| && (server_string[ base ] != NUL) |
| ; base++ ) { |
| /* empty */ |
| } |
| } |
| } |
| |
| void |
| __glXEnableDirectExtension(__GLXscreenConfigs *psc, const char *name) |
| { |
| __glXExtensionsCtr(); |
| __glXExtensionsCtrScreen(psc); |
| |
| set_glx_extension(known_glx_extensions, |
| name, strlen(name), GL_TRUE, psc->direct_support); |
| } |
| |
| /** |
| * Initialize global extension support tables. |
| */ |
| |
| static void |
| __glXExtensionsCtr( void ) |
| { |
| unsigned i; |
| static GLboolean ext_list_first_time = GL_TRUE; |
| |
| |
| if ( ext_list_first_time ) { |
| ext_list_first_time = GL_FALSE; |
| |
| (void) memset( client_glx_support, 0, sizeof( client_glx_support ) ); |
| (void) memset( direct_glx_support, 0, sizeof( direct_glx_support ) ); |
| (void) memset( client_glx_only, 0, sizeof( client_glx_only ) ); |
| (void) memset( direct_glx_only, 0, sizeof( direct_glx_only ) ); |
| |
| (void) memset( client_gl_support, 0, sizeof( client_gl_support ) ); |
| (void) memset( client_gl_only, 0, sizeof( client_gl_only ) ); |
| |
| for ( i = 0 ; known_glx_extensions[i].name != NULL ; i++ ) { |
| const unsigned bit = known_glx_extensions[i].bit; |
| |
| if ( known_glx_extensions[i].client_support ) { |
| SET_BIT( client_glx_support, bit ); |
| } |
| |
| if ( known_glx_extensions[i].direct_support ) { |
| SET_BIT( direct_glx_support, bit ); |
| } |
| |
| if ( known_glx_extensions[i].client_only ) { |
| SET_BIT( client_glx_only, bit ); |
| } |
| |
| if ( known_glx_extensions[i].direct_only ) { |
| SET_BIT( direct_glx_only, bit ); |
| } |
| } |
| |
| for ( i = 0 ; known_gl_extensions[i].name != NULL ; i++ ) { |
| const unsigned bit = known_gl_extensions[i].bit; |
| |
| if ( known_gl_extensions[i].client_support ) { |
| SET_BIT( client_gl_support, bit ); |
| } |
| |
| if ( known_gl_extensions[i].client_only ) { |
| SET_BIT( client_gl_only, bit ); |
| } |
| } |
| |
| #if 0 |
| fprintf( stderr, "[%s:%u] Maximum client library version: %u.%u\n", |
| __func__, __LINE__, gl_major, gl_minor ); |
| #endif |
| } |
| } |
| |
| |
| /** |
| * Make sure that per-screen direct-support table is initialized. |
| * |
| * \param psc Pointer to GLX per-screen record. |
| */ |
| |
| static void |
| __glXExtensionsCtrScreen( __GLXscreenConfigs *psc ) |
| { |
| if (psc->ext_list_first_time) { |
| psc->ext_list_first_time = GL_FALSE; |
| (void) memcpy( psc->direct_support, direct_glx_support, |
| sizeof( direct_glx_support ) ); |
| } |
| } |
| |
| |
| /** |
| * Check if a certain extension is enabled on a given screen. |
| * |
| * \param psc Pointer to GLX per-screen record. |
| * \param bit Bit index in the direct-support table. |
| * \returns If the extension bit is enabled for the screen, \c GL_TRUE is |
| * returned. If the extension bit is not enabled or if \c psc is |
| * \c NULL, then \c GL_FALSE is returned. |
| */ |
| GLboolean |
| __glXExtensionBitIsEnabled( __GLXscreenConfigs *psc, unsigned bit ) |
| { |
| GLboolean enabled = GL_FALSE; |
| |
| if ( psc != NULL ) { |
| __glXExtensionsCtr(); |
| __glXExtensionsCtrScreen( psc ); |
| enabled = EXT_ENABLED( bit, psc->direct_support ); |
| } |
| |
| return enabled; |
| } |
| |
| |
| /** |
| * Check if a certain extension is enabled in a given context. |
| * |
| */ |
| GLboolean |
| __glExtensionBitIsEnabled( const __GLXcontext * gc, unsigned bit ) |
| { |
| GLboolean enabled = GL_FALSE; |
| |
| if ( gc != NULL ) { |
| enabled = EXT_ENABLED( bit, gc->gl_extension_bits ); |
| } |
| |
| return enabled; |
| } |
| |
| |
| |
| /** |
| * Convert a bit-field to a string of supported extensions. |
| */ |
| static char * |
| __glXGetStringFromTable( const struct extension_info * ext, |
| const unsigned char * supported ) |
| { |
| unsigned i; |
| unsigned ext_str_len; |
| char * ext_str; |
| char * point; |
| |
| |
| ext_str_len = 0; |
| for ( i = 0 ; ext[i].name != NULL ; i++ ) { |
| if ( EXT_ENABLED( ext[i].bit, supported ) ) { |
| ext_str_len += ext[i].name_len + 1; |
| } |
| } |
| |
| ext_str = Xmalloc( ext_str_len + 1 ); |
| if ( ext_str != NULL ) { |
| point = ext_str; |
| |
| for ( i = 0 ; ext[i].name != NULL ; i++ ) { |
| if ( EXT_ENABLED( ext[i].bit, supported ) ) { |
| (void) memcpy( point, ext[i].name, ext[i].name_len ); |
| point += ext[i].name_len; |
| |
| *point = ' '; |
| point++; |
| } |
| } |
| |
| *point = '\0'; |
| } |
| |
| return ext_str; |
| } |
| |
| |
| /** |
| * Get the string of client library supported extensions. |
| */ |
| const char * |
| __glXGetClientExtensions( void ) |
| { |
| if ( __glXGLXClientExtensions == NULL ) { |
| __glXExtensionsCtr(); |
| __glXGLXClientExtensions = __glXGetStringFromTable( known_glx_extensions, |
| client_glx_support ); |
| } |
| |
| return __glXGLXClientExtensions; |
| } |
| |
| |
| /** |
| * Calculate the list of application usable extensions. The resulting |
| * string is stored in \c psc->effectiveGLXexts. |
| * |
| * \param psc Pointer to GLX per-screen record. |
| * \param display_is_direct_capable True if the display is capable of |
| * direct rendering. |
| * \param minor_version GLX minor version from the server. |
| */ |
| |
| void |
| __glXCalculateUsableExtensions( __GLXscreenConfigs *psc, |
| GLboolean display_is_direct_capable, |
| int minor_version ) |
| { |
| unsigned char server_support[8]; |
| unsigned char usable[8]; |
| unsigned i; |
| |
| __glXExtensionsCtr(); |
| __glXExtensionsCtrScreen( psc ); |
| |
| (void) memset( server_support, 0, sizeof( server_support ) ); |
| __glXProcessServerString( known_glx_extensions, |
| psc->serverGLXexts, server_support ); |
| |
| |
| /* This is a hack. Some servers support GLX 1.3 but don't export |
| * all of the extensions implied by GLX 1.3. If the server claims |
| * support for GLX 1.3, enable support for the extensions that can be |
| * "emulated" as well. |
| */ |
| |
| if ( minor_version >= 3 ) { |
| SET_BIT( server_support, EXT_visual_info_bit ); |
| SET_BIT( server_support, EXT_visual_rating_bit ); |
| SET_BIT( server_support, SGI_make_current_read_bit ); |
| SET_BIT( server_support, SGIX_fbconfig_bit ); |
| SET_BIT( server_support, SGIX_pbuffer_bit ); |
| |
| /* This one is a little iffy. GLX 1.3 doesn't incorporate all of this |
| * extension. However, the only part that is not strictly client-side |
| * is shared. That's the glXQueryContext / glXQueryContextInfoEXT |
| * function. |
| */ |
| |
| SET_BIT( server_support, EXT_import_context_bit ); |
| } |
| |
| |
| /* An extension is supported if the client-side (i.e., libGL) supports |
| * it and the "server" supports it. In this case that means that either |
| * the true server supports it or it is only for direct-rendering and |
| * the direct rendering driver supports it. |
| * |
| * If the display is not capable of direct rendering, then the extension |
| * is enabled if and only if the client-side library and the server |
| * support it. |
| */ |
| |
| if ( display_is_direct_capable ) { |
| for ( i = 0 ; i < 8 ; i++ ) { |
| usable[i] = (client_glx_support[i] & client_glx_only[i]) |
| | (client_glx_support[i] & psc->direct_support[i] & server_support[i]) |
| | (client_glx_support[i] & psc->direct_support[i] & direct_glx_only[i]); |
| } |
| } |
| else { |
| for ( i = 0 ; i < 8 ; i++ ) { |
| usable[i] = (client_glx_support[i] & client_glx_only[i]) |
| | (client_glx_support[i] & server_support[i]); |
| } |
| } |
| |
| psc->effectiveGLXexts = __glXGetStringFromTable( known_glx_extensions, |
| usable ); |
| } |
| |
| |
| /** |
| * Calculate the list of application usable extensions. The resulting |
| * string is stored in \c gc->extensions. |
| * |
| * \param gc Pointer to GLX context. |
| * \param server_string Extension string from the server. |
| * \param major_version GL major version from the server. |
| * \param minor_version GL minor version from the server. |
| */ |
| |
| void |
| __glXCalculateUsableGLExtensions( __GLXcontext * gc, |
| const char * server_string, |
| int major_version, int minor_version ) |
| { |
| unsigned char server_support[ __GL_EXT_BYTES ]; |
| unsigned char usable[ __GL_EXT_BYTES ]; |
| unsigned i; |
| |
| |
| __glXExtensionsCtr(); |
| |
| (void) memset( server_support, 0, sizeof( server_support ) ); |
| __glXProcessServerString( known_gl_extensions, server_string, |
| server_support ); |
| |
| |
| /* Handle lazy servers that don't export all the extensions strings that |
| * are part of the GL core version that they support. |
| */ |
| |
| for ( i = 0 ; i < __GL_EXT_BYTES ; i++ ) { |
| if ( (known_gl_extensions[i].version_major != 0) |
| && ((major_version > known_gl_extensions[i].version_major) |
| || ((major_version == known_gl_extensions[i].version_major) |
| && (minor_version >= known_gl_extensions[i].version_minor))) ) { |
| SET_BIT( server_support, known_gl_extensions[i].bit ); |
| } |
| } |
| |
| |
| /* An extension is supported if the client-side (i.e., libGL) supports |
| * it and the server supports it or the client-side library supports it |
| * and it only needs client-side support. |
| */ |
| |
| for ( i = 0 ; i < __GL_EXT_BYTES ; i++ ) { |
| usable[i] = (client_gl_support[i] & client_gl_only[i]) |
| | (client_gl_support[i] & server_support[i]); |
| } |
| |
| gc->extensions = (unsigned char *) |
| __glXGetStringFromTable( known_gl_extensions, usable ); |
| (void) memcpy( gc->gl_extension_bits, usable, sizeof( usable ) ); |
| } |
| |
| |
| /** |
| * Calculates the maximum core GL version that can be supported for indirect |
| * rendering. |
| */ |
| void |
| __glXGetGLVersion( int * major_version, int * minor_version ) |
| { |
| __glXExtensionsCtr(); |
| *major_version = gl_major; |
| *minor_version = gl_minor; |
| } |
| |
| |
| /** |
| * Get a string representing the set of extensions supported by the client |
| * library. This is currently only used to send the list of extensions |
| * supported by the client to the server. |
| */ |
| char * |
| __glXGetClientGLExtensionString( void ) |
| { |
| __glXExtensionsCtr(); |
| return __glXGetStringFromTable( known_gl_extensions, client_gl_support ); |
| } |
