| /* |
| * Mesa 3-D graphics library |
| * Version: 7.6 |
| * |
| * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. |
| * Copyright (C) 2009 VMware, Inc. 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 |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL |
| * BRIAN PAUL 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 |
| * \brief Extension handling |
| */ |
| |
| |
| #include "glheader.h" |
| #include "imports.h" |
| #include "context.h" |
| #include "extensions.h" |
| #include "mfeatures.h" |
| #include "mtypes.h" |
| |
| #define ALIGN(value, alignment) (((value) + alignment - 1) & ~(alignment - 1)) |
| |
| enum { |
| DISABLE = 0, |
| GLL = 1 << API_OPENGL, /* GL Legacy / Compatibility */ |
| GLC = 1 << API_OPENGL_CORE, /* GL Core */ |
| GL = (1 << API_OPENGL) | (1 << API_OPENGL_CORE), |
| ES1 = 1 << API_OPENGLES, |
| ES2 = 1 << API_OPENGLES2, |
| }; |
| |
| /** |
| * \brief An element of the \c extension_table. |
| */ |
| struct extension { |
| /** Name of extension, such as "GL_ARB_depth_clamp". */ |
| const char *name; |
| |
| /** Offset (in bytes) of the corresponding member in struct gl_extensions. */ |
| size_t offset; |
| |
| /** Set of API's in which the extension exists, as a bitset. */ |
| uint8_t api_set; |
| |
| /** Year the extension was proposed or approved. Used to sort the |
| * extension string chronologically. */ |
| uint16_t year; |
| }; |
| |
| |
| /** |
| * Given a member \c x of struct gl_extensions, return offset of |
| * \c x in bytes. |
| */ |
| #define o(x) offsetof(struct gl_extensions, x) |
| |
| |
| /** |
| * \brief Table of supported OpenGL extensions for all API's. |
| */ |
| static const struct extension extension_table[] = { |
| /* ARB Extensions */ |
| { "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility), GL, 2009 }, |
| { "GL_ARB_base_instance", o(ARB_base_instance), GL, 2011 }, |
| { "GL_ARB_blend_func_extended", o(ARB_blend_func_extended), GL, 2009 }, |
| { "GL_ARB_color_buffer_float", o(ARB_color_buffer_float), GL, 2004 }, |
| { "GL_ARB_copy_buffer", o(ARB_copy_buffer), GL, 2008 }, |
| { "GL_ARB_conservative_depth", o(ARB_conservative_depth), GL, 2011 }, |
| { "GL_ARB_debug_output", o(dummy_true), GL, 2009 }, |
| { "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float), GL, 2008 }, |
| { "GL_ARB_depth_clamp", o(ARB_depth_clamp), GL, 2003 }, |
| { "GL_ARB_depth_texture", o(ARB_depth_texture), GLL, 2001 }, |
| { "GL_ARB_draw_buffers", o(dummy_true), GL, 2002 }, |
| { "GL_ARB_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 }, |
| { "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex), GL, 2009 }, |
| { "GL_ARB_draw_instanced", o(ARB_draw_instanced), GL, 2008 }, |
| { "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location), GL, 2009 }, |
| { "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions), GL, 2009 }, |
| { "GL_ARB_fragment_program", o(ARB_fragment_program), GLL, 2002 }, |
| { "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow), GLL, 2003 }, |
| { "GL_ARB_fragment_shader", o(ARB_fragment_shader), GL, 2002 }, |
| { "GL_ARB_framebuffer_object", o(ARB_framebuffer_object), GL, 2005 }, |
| { "GL_ARB_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 }, |
| { "GL_ARB_half_float_pixel", o(ARB_half_float_pixel), GL, 2003 }, |
| { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL, 2008 }, |
| { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL, 2008 }, |
| { "GL_ARB_invalidate_subdata", o(dummy_true), GL, 2012 }, |
| { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL, 2008 }, |
| { "GL_ARB_multisample", o(dummy_true), GLL, 1994 }, |
| { "GL_ARB_multitexture", o(dummy_true), GLL, 1998 }, |
| { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL, 2003 }, |
| { "GL_ARB_occlusion_query", o(ARB_occlusion_query), GLL, 2001 }, |
| { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 }, |
| { "GL_ARB_point_parameters", o(EXT_point_parameters), GLL, 1997 }, |
| { "GL_ARB_point_sprite", o(ARB_point_sprite), GL, 2003 }, |
| { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 }, |
| { "GL_ARB_robustness", o(dummy_true), GL, 2010 }, |
| { "GL_ARB_sampler_objects", o(dummy_true), GL, 2009 }, |
| { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL, 2009 }, |
| { "GL_ARB_shader_bit_encoding", o(ARB_shader_bit_encoding), GL, 2010 }, |
| { "GL_ARB_shader_objects", o(ARB_shader_objects), GL, 2002 }, |
| { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 }, |
| { "GL_ARB_shader_texture_lod", o(ARB_shader_texture_lod), GL, 2009 }, |
| { "GL_ARB_shading_language_100", o(ARB_shading_language_100), GLL, 2003 }, |
| { "GL_ARB_shadow", o(ARB_shadow), GLL, 2001 }, |
| { "GL_ARB_sync", o(ARB_sync), GL, 2003 }, |
| { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 2000 }, |
| { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GL, 2008 }, |
| { "GL_ARB_texture_compression", o(dummy_true), GLL, 2000 }, |
| { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 }, |
| { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GLL, 1999 }, |
| { "GL_ARB_texture_env_add", o(dummy_true), GLL, 1999 }, |
| { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GLL, 2001 }, |
| { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GLL, 2001 }, |
| { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GLL, 2001 }, |
| { "GL_ARB_texture_float", o(ARB_texture_float), GL, 2004 }, |
| { "GL_ARB_texture_mirrored_repeat", o(dummy_true), GLL, 2001 }, |
| { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL, 2009 }, |
| { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL, 2003 }, |
| { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL, 2004 }, |
| { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL, 2009 }, |
| { "GL_ARB_texture_rg", o(ARB_texture_rg), GL, 2008 }, |
| { "GL_ARB_texture_storage", o(ARB_texture_storage), GL, 2011 }, |
| { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 }, |
| { "GL_ARB_timer_query", o(ARB_timer_query), GL, 2010 }, |
| { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL, 2010 }, |
| { "GL_ARB_transform_feedback3", o(ARB_transform_feedback3), GL, 2010 }, |
| { "GL_ARB_transform_feedback_instanced", o(ARB_transform_feedback_instanced), GL, 2011 }, |
| { "GL_ARB_transpose_matrix", o(ARB_transpose_matrix), GLL, 1999 }, |
| { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL, 2009 }, |
| { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 }, |
| { "GL_ARB_vertex_array_object", o(dummy_true), GL, 2006 }, |
| { "GL_ARB_vertex_buffer_object", o(dummy_true), GLL, 2003 }, |
| { "GL_ARB_vertex_program", o(ARB_vertex_program), GLL, 2002 }, |
| { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL, 2002 }, |
| { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL, 2009 }, |
| { "GL_ARB_window_pos", o(ARB_window_pos), GLL, 2001 }, |
| /* EXT extensions */ |
| { "GL_EXT_abgr", o(dummy_true), GL, 1995 }, |
| { "GL_EXT_bgra", o(dummy_true), GLL, 1995 }, |
| { "GL_EXT_blend_color", o(EXT_blend_color), GLL, 1995 }, |
| { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 }, |
| { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 }, |
| { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GLL | ES1 | ES2, 1995 }, |
| { "GL_EXT_blend_subtract", o(dummy_true), GLL, 1995 }, |
| { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL, 1996 }, |
| { "GL_EXT_compiled_vertex_array", o(EXT_compiled_vertex_array), GLL, 1996 }, |
| { "GL_EXT_copy_texture", o(dummy_true), GLL, 1995 }, |
| { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL, 2002 }, |
| { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL, 2006 }, |
| { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL, 2006 }, |
| { "GL_EXT_draw_range_elements", o(EXT_draw_range_elements), GLL, 1997 }, |
| { "GL_EXT_fog_coord", o(EXT_fog_coord), GLL, 1999 }, |
| { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL, 2005 }, |
| { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL, 2005 }, |
| { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL, 2000 }, |
| { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 }, |
| { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GLL, 2006 }, |
| { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL, 2006 }, |
| { "GL_EXT_multi_draw_arrays", o(dummy_true), GLL | ES1 | ES2, 1999 }, |
| { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2005 }, |
| { "GL_EXT_packed_float", o(EXT_packed_float), GL, 2004 }, |
| { "GL_EXT_packed_pixels", o(EXT_packed_pixels), GLL, 1997 }, |
| { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 }, |
| { "GL_EXT_point_parameters", o(EXT_point_parameters), GLL, 1997 }, |
| { "GL_EXT_polygon_offset", o(dummy_true), GLL, 1995 }, |
| { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 }, |
| { "GL_EXT_rescale_normal", o(EXT_rescale_normal), GLL, 1997 }, |
| { "GL_EXT_secondary_color", o(EXT_secondary_color), GLL, 1999 }, |
| { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GLL, 2008 }, |
| { "GL_EXT_separate_specular_color", o(EXT_separate_specular_color), GLL, 1997 }, |
| { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GLL, 2002 }, |
| { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GLL, 2001 }, |
| { "GL_EXT_stencil_wrap", o(dummy_true), GLL, 2002 }, |
| { "GL_EXT_subtexture", o(dummy_true), GLL, 1995 }, |
| { "GL_EXT_texture3D", o(EXT_texture3D), GLL, 1996 }, |
| { "GL_EXT_texture_array", o(EXT_texture_array), GL, 2006 }, |
| { "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL | ES1 | ES2, 2004 }, |
| { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc), GL, 2006 }, |
| { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 }, |
| { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL, 2000 }, |
| { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GLL, 2001 }, |
| { "GL_EXT_texture_edge_clamp", o(dummy_true), GLL, 1997 }, |
| { "GL_EXT_texture_env_add", o(dummy_true), GLL, 1999 }, |
| { "GL_EXT_texture_env_combine", o(dummy_true), GLL, 2000 }, |
| { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GLL, 2000 }, |
| { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2, 1999 }, |
| { "GL_EXT_texture_format_BGRA8888", o(dummy_true), ES1 | ES2, 2005 }, |
| { "GL_EXT_texture_rg", o(ARB_texture_rg), ES2, 2011 }, |
| { "GL_EXT_read_format_bgra", o(dummy_true), ES1 | ES2, 2009 }, |
| { "GL_EXT_texture_integer", o(EXT_texture_integer), GL, 2006 }, |
| { "GL_EXT_texture_lod_bias", o(dummy_true), GLL | ES1, 1999 }, |
| { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL, 2004 }, |
| { "GL_EXT_texture_object", o(dummy_true), GLL, 1995 }, |
| { "GL_EXT_texture", o(dummy_true), GLL, 1996 }, |
| { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GLL, 2004 }, |
| { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL, 2004 }, |
| { "GL_EXT_texture_snorm", o(EXT_texture_snorm), GL, 2009 }, |
| { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL, 2004 }, |
| { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode), GL, 2006 }, |
| { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 }, |
| { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2, 2008 }, |
| { "GL_EXT_timer_query", o(EXT_timer_query), GL, 2006 }, |
| { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL, 2011 }, |
| { "GL_EXT_unpack_subimage", o(dummy_true), ES2, 2011 }, |
| { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 }, |
| { "GL_EXT_vertex_array", o(dummy_true), GLL, 1995 }, |
| |
| /* OES extensions */ |
| { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1, 2009 }, |
| { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1, 2009 }, |
| { "GL_OES_blend_subtract", o(dummy_true), ES1, 2009 }, |
| { "GL_OES_byte_coordinates", o(dummy_true), ES1, 2002 }, |
| { "GL_OES_compressed_ETC1_RGB8_texture", o(OES_compressed_ETC1_RGB8_texture), ES1 | ES2, 2005 }, |
| { "GL_OES_compressed_paletted_texture", o(dummy_true), ES1, 2003 }, |
| { "GL_OES_depth24", o(EXT_framebuffer_object), ES1 | ES2, 2005 }, |
| { "GL_OES_depth32", o(dummy_false), DISABLE, 2005 }, |
| { "GL_OES_depth_texture", o(ARB_depth_texture), ES2, 2006 }, |
| #if FEATURE_OES_draw_texture |
| { "GL_OES_draw_texture", o(OES_draw_texture), ES1, 2004 }, |
| #endif |
| #if FEATURE_OES_EGL_image |
| /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */ |
| { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2, 2006 }, |
| { "GL_OES_EGL_image_external", o(OES_EGL_image_external), ES1 | ES2, 2010 }, |
| #endif |
| { "GL_OES_element_index_uint", o(dummy_true), ES1 | ES2, 2005 }, |
| { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 | ES2, 2005 }, |
| { "GL_OES_fixed_point", o(dummy_true), ES1, 2002 }, |
| { "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1, 2005 }, |
| { "GL_OES_mapbuffer", o(dummy_true), ES1 | ES2, 2005 }, |
| { "GL_OES_matrix_get", o(dummy_true), ES1, 2004 }, |
| { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2, 2007 }, |
| { "GL_OES_point_size_array", o(dummy_true), ES1, 2004 }, |
| { "GL_OES_point_sprite", o(ARB_point_sprite), ES1, 2004 }, |
| { "GL_OES_query_matrix", o(dummy_true), ES1, 2003 }, |
| { "GL_OES_read_format", o(dummy_true), GL | ES1, 2003 }, |
| { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 | ES2, 2005 }, |
| { "GL_OES_single_precision", o(dummy_true), ES1, 2003 }, |
| { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2, 2005 }, |
| { "GL_OES_stencil1", o(dummy_false), DISABLE, 2005 }, |
| { "GL_OES_stencil4", o(dummy_false), DISABLE, 2005 }, |
| { "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 | ES2, 2005 }, |
| { "GL_OES_stencil_wrap", o(dummy_true), ES1, 2002 }, |
| { "GL_OES_texture_3D", o(EXT_texture3D), ES2, 2005 }, |
| { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1, 2007 }, |
| { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1, 2005 }, |
| { "GL_OES_texture_mirrored_repeat", o(dummy_true), ES1, 2005 }, |
| { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2, 2005 }, |
| { "GL_OES_vertex_array_object", o(dummy_true), ES1 | ES2, 2010 }, |
| |
| /* Vendor extensions */ |
| { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL, 1999 }, |
| { "GL_AMD_conservative_depth", o(ARB_conservative_depth), GL, 2009 }, |
| { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 }, |
| { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture), GL, 2009 }, |
| { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 }, |
| { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL, 2006 }, |
| { "GL_APPLE_packed_pixels", o(APPLE_packed_pixels), GLL, 2002 }, |
| { "GL_APPLE_texture_max_level", o(dummy_true), ES1 | ES2, 2009 }, |
| { "GL_APPLE_vertex_array_object", o(dummy_true), GLL, 2002 }, |
| { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 }, |
| { "GL_ATI_draw_buffers", o(dummy_true), GLL, 2002 }, |
| { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GLL, 2001 }, |
| { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GLL, 2001 }, |
| { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GLL, 2006 }, |
| { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc), GL, 2004 }, |
| { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GLL, 2002 }, |
| { "GL_ATI_texture_float", o(ARB_texture_float), GL, 2002 }, |
| { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL, 2006 }, |
| { "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays), GL, 1998 }, |
| { "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip), GLL, 1996 }, |
| { "GL_IBM_texture_mirrored_repeat", o(dummy_true), GLL, 1998 }, |
| { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 }, |
| { "GL_MESA_pack_invert", o(MESA_pack_invert), GL, 2002 }, |
| { "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL, 1999 }, |
| { "GL_MESA_texture_array", o(MESA_texture_array), GLL, 2007 }, |
| { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm), GL, 2009 }, |
| { "GL_MESA_window_pos", o(ARB_window_pos), GLL, 2000 }, |
| { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL, 2002 }, |
| { "GL_NV_blend_square", o(NV_blend_square), GLL, 1999 }, |
| { "GL_NV_conditional_render", o(NV_conditional_render), GL, 2008 }, |
| { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL, 2001 }, |
| { "GL_NV_draw_buffers", o(dummy_true), ES2, 2011 }, |
| { "GL_NV_fbo_color_attachments", o(EXT_framebuffer_object), ES2, 2010 }, |
| { "GL_NV_fog_distance", o(NV_fog_distance), GLL, 2001 }, |
| { "GL_NV_fragment_program", o(NV_fragment_program), GLL, 2001 }, |
| { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GLL, 2005 }, |
| { "GL_NV_light_max_exponent", o(NV_light_max_exponent), GLL, 1999 }, |
| { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2000 }, |
| { "GL_NV_point_sprite", o(NV_point_sprite), GL, 2001 }, |
| { "GL_NV_primitive_restart", o(NV_primitive_restart), GLL, 2002 }, |
| { "GL_NV_read_buffer", o(dummy_true), ES2, 2011 }, |
| { "GL_NV_texgen_reflection", o(NV_texgen_reflection), GLL, 1999 }, |
| { "GL_NV_texture_barrier", o(NV_texture_barrier), GL, 2009 }, |
| { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GLL, 1999 }, |
| { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GLL, 2000 }, |
| { "GL_NV_vertex_program1_1", o(NV_vertex_program1_1), GLL, 2001 }, |
| { "GL_NV_vertex_program", o(NV_vertex_program), GLL, 2000 }, |
| { "GL_S3_s3tc", o(S3_s3tc), GL, 1999 }, |
| { "GL_SGIS_generate_mipmap", o(dummy_true), GLL, 1997 }, |
| { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 1997 }, |
| { "GL_SGIS_texture_edge_clamp", o(dummy_true), GLL, 1997 }, |
| { "GL_SGIS_texture_lod", o(SGIS_texture_lod), GLL, 1997 }, |
| { "GL_SUN_multi_draw_arrays", o(dummy_true), GLL, 1999 }, |
| |
| { 0, 0, 0, 0 }, |
| }; |
| |
| |
| /** |
| * Given an extension name, lookup up the corresponding member of struct |
| * gl_extensions and return that member's offset (in bytes). If the name is |
| * not found in the \c extension_table, return 0. |
| * |
| * \param name Name of extension. |
| * \return Offset of member in struct gl_extensions. |
| */ |
| static size_t |
| name_to_offset(const char* name) |
| { |
| const struct extension *i; |
| |
| if (name == 0) |
| return 0; |
| |
| for (i = extension_table; i->name != 0; ++i) { |
| if (strcmp(name, i->name) == 0) |
| return i->offset; |
| } |
| |
| return 0; |
| } |
| |
| |
| /** |
| * \brief Extensions enabled by default. |
| * |
| * These extensions are enabled by _mesa_init_extensions(). |
| * |
| * XXX: Should these defaults also apply to GLES? |
| */ |
| static const size_t default_extensions[] = { |
| o(ARB_copy_buffer), |
| o(ARB_transpose_matrix), |
| o(ARB_window_pos), |
| |
| o(EXT_compiled_vertex_array), |
| o(EXT_draw_range_elements), |
| o(EXT_packed_pixels), |
| o(EXT_rescale_normal), |
| o(EXT_separate_specular_color), |
| o(EXT_texture3D), |
| |
| o(OES_standard_derivatives), |
| |
| /* Vendor Extensions */ |
| o(APPLE_packed_pixels), |
| o(IBM_multimode_draw_arrays), |
| o(IBM_rasterpos_clip), |
| o(NV_light_max_exponent), |
| o(NV_texgen_reflection), |
| o(SGIS_texture_lod), |
| |
| 0, |
| }; |
| |
| |
| /** |
| * Enable all extensions suitable for a software-only renderer. |
| * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc. |
| */ |
| void |
| _mesa_enable_sw_extensions(struct gl_context *ctx) |
| { |
| /*ctx->Extensions.ARB_copy_buffer = GL_TRUE;*/ |
| ctx->Extensions.ARB_depth_clamp = GL_TRUE; |
| ctx->Extensions.ARB_depth_texture = GL_TRUE; |
| ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE; |
| ctx->Extensions.ARB_draw_instanced = GL_TRUE; |
| ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE; |
| ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE; |
| #if FEATURE_ARB_fragment_program |
| ctx->Extensions.ARB_fragment_program = GL_TRUE; |
| ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_fragment_shader |
| ctx->Extensions.ARB_fragment_shader = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_framebuffer_object |
| ctx->Extensions.ARB_framebuffer_object = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_geometry_shader4 && 0 |
| /* XXX re-enable when GLSL compiler again supports geometry shaders */ |
| ctx->Extensions.ARB_geometry_shader4 = GL_TRUE; |
| #endif |
| ctx->Extensions.ARB_half_float_pixel = GL_TRUE; |
| ctx->Extensions.ARB_half_float_vertex = GL_TRUE; |
| ctx->Extensions.ARB_map_buffer_range = GL_TRUE; |
| #if FEATURE_queryobj |
| ctx->Extensions.ARB_occlusion_query = GL_TRUE; |
| ctx->Extensions.ARB_occlusion_query2 = GL_TRUE; |
| #endif |
| ctx->Extensions.ARB_point_sprite = GL_TRUE; |
| #if FEATURE_ARB_shader_objects |
| ctx->Extensions.ARB_shader_objects = GL_TRUE; |
| ctx->Extensions.EXT_separate_shader_objects = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_shading_language_100 |
| ctx->Extensions.ARB_shading_language_100 = GL_TRUE; |
| #endif |
| ctx->Extensions.ARB_shadow = GL_TRUE; |
| ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; |
| ctx->Extensions.ARB_texture_cube_map = GL_TRUE; |
| ctx->Extensions.ARB_texture_env_combine = GL_TRUE; |
| ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE; |
| ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE; |
| /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/ |
| ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE; |
| ctx->Extensions.ARB_texture_rg = GL_TRUE; |
| ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE; |
| ctx->Extensions.ARB_texture_storage = GL_TRUE; |
| #if FEATURE_ARB_vertex_program |
| ctx->Extensions.ARB_vertex_program = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_vertex_shader |
| ctx->Extensions.ARB_vertex_shader = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_sync |
| ctx->Extensions.ARB_sync = GL_TRUE; |
| #endif |
| #if FEATURE_APPLE_object_purgeable |
| ctx->Extensions.APPLE_object_purgeable = GL_TRUE; |
| #endif |
| ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE; |
| #if FEATURE_ATI_fragment_shader |
| ctx->Extensions.ATI_fragment_shader = GL_TRUE; |
| #endif |
| ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE; |
| ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE; |
| ctx->Extensions.ATI_texture_mirror_once = GL_TRUE; |
| ctx->Extensions.ATI_separate_stencil = GL_TRUE; |
| ctx->Extensions.EXT_blend_color = GL_TRUE; |
| ctx->Extensions.EXT_blend_equation_separate = GL_TRUE; |
| ctx->Extensions.EXT_blend_func_separate = GL_TRUE; |
| ctx->Extensions.EXT_blend_minmax = GL_TRUE; |
| ctx->Extensions.EXT_depth_bounds_test = GL_TRUE; |
| ctx->Extensions.EXT_draw_buffers2 = GL_TRUE; |
| ctx->Extensions.EXT_fog_coord = GL_TRUE; |
| #if FEATURE_EXT_framebuffer_object |
| ctx->Extensions.EXT_framebuffer_object = GL_TRUE; |
| #endif |
| #if FEATURE_EXT_framebuffer_blit |
| ctx->Extensions.EXT_framebuffer_blit = GL_TRUE; |
| #endif |
| ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE; |
| #if FEATURE_EXT_pixel_buffer_object |
| ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE; |
| #endif |
| ctx->Extensions.EXT_point_parameters = GL_TRUE; |
| ctx->Extensions.EXT_provoking_vertex = GL_TRUE; |
| ctx->Extensions.EXT_shadow_funcs = GL_TRUE; |
| ctx->Extensions.EXT_secondary_color = GL_TRUE; |
| ctx->Extensions.EXT_stencil_two_side = GL_TRUE; |
| ctx->Extensions.EXT_texture_array = GL_TRUE; |
| ctx->Extensions.EXT_texture_compression_latc = GL_TRUE; |
| ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE; |
| ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE; |
| ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE; |
| ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE; |
| #if FEATURE_EXT_texture_sRGB |
| ctx->Extensions.EXT_texture_sRGB = GL_TRUE; |
| ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE; |
| #endif |
| ctx->Extensions.EXT_texture_swizzle = GL_TRUE; |
| #if FEATURE_EXT_transform_feedback |
| /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/ |
| #endif |
| ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE; |
| /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/ |
| ctx->Extensions.MESA_pack_invert = GL_TRUE; |
| ctx->Extensions.MESA_resize_buffers = GL_TRUE; |
| ctx->Extensions.MESA_texture_array = GL_TRUE; |
| ctx->Extensions.MESA_ycbcr_texture = GL_TRUE; |
| ctx->Extensions.NV_blend_square = GL_TRUE; |
| ctx->Extensions.NV_conditional_render = GL_TRUE; |
| /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/ |
| ctx->Extensions.NV_point_sprite = GL_TRUE; |
| ctx->Extensions.NV_texture_env_combine4 = GL_TRUE; |
| ctx->Extensions.NV_texture_rectangle = GL_TRUE; |
| /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/ |
| #if FEATURE_NV_vertex_program |
| ctx->Extensions.NV_vertex_program = GL_TRUE; |
| ctx->Extensions.NV_vertex_program1_1 = GL_TRUE; |
| #endif |
| #if FEATURE_NV_fragment_program |
| ctx->Extensions.NV_fragment_program = GL_TRUE; |
| #endif |
| #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program |
| ctx->Extensions.NV_fragment_program_option = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program |
| ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE; |
| #endif |
| #if FEATURE_texture_fxt1 |
| _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1"); |
| #endif |
| #if FEATURE_texture_s3tc |
| if (ctx->Mesa_DXTn) { |
| _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc"); |
| _mesa_enable_extension(ctx, "GL_S3_s3tc"); |
| } |
| #endif |
| } |
| |
| |
| /** |
| * Enable all OpenGL 1.3 features and extensions. |
| * A convenience function to be called by drivers. |
| */ |
| void |
| _mesa_enable_1_3_extensions(struct gl_context *ctx) |
| { |
| ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; |
| ctx->Extensions.ARB_texture_cube_map = GL_TRUE; |
| ctx->Extensions.ARB_texture_env_combine = GL_TRUE; |
| ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE; |
| /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/ |
| } |
| |
| |
| |
| /** |
| * Enable all OpenGL 1.4 features and extensions. |
| * A convenience function to be called by drivers. |
| */ |
| void |
| _mesa_enable_1_4_extensions(struct gl_context *ctx) |
| { |
| ctx->Extensions.ARB_depth_texture = GL_TRUE; |
| ctx->Extensions.ARB_shadow = GL_TRUE; |
| ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE; |
| ctx->Extensions.ARB_window_pos = GL_TRUE; |
| ctx->Extensions.EXT_blend_color = GL_TRUE; |
| ctx->Extensions.EXT_blend_func_separate = GL_TRUE; |
| ctx->Extensions.EXT_blend_minmax = GL_TRUE; |
| ctx->Extensions.EXT_fog_coord = GL_TRUE; |
| ctx->Extensions.EXT_point_parameters = GL_TRUE; |
| ctx->Extensions.EXT_secondary_color = GL_TRUE; |
| } |
| |
| |
| /** |
| * Enable all OpenGL 1.5 features and extensions. |
| * A convenience function to be called by drivers. |
| */ |
| void |
| _mesa_enable_1_5_extensions(struct gl_context *ctx) |
| { |
| ctx->Extensions.ARB_occlusion_query = GL_TRUE; |
| ctx->Extensions.EXT_shadow_funcs = GL_TRUE; |
| } |
| |
| |
| /** |
| * Enable all OpenGL 2.0 features and extensions. |
| * A convenience function to be called by drivers. |
| */ |
| void |
| _mesa_enable_2_0_extensions(struct gl_context *ctx) |
| { |
| #if FEATURE_ARB_fragment_shader |
| ctx->Extensions.ARB_fragment_shader = GL_TRUE; |
| #endif |
| ctx->Extensions.ARB_point_sprite = GL_TRUE; |
| ctx->Extensions.EXT_blend_equation_separate = GL_TRUE; |
| ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE; |
| #if FEATURE_ARB_shader_objects |
| ctx->Extensions.ARB_shader_objects = GL_TRUE; |
| #endif |
| #if FEATURE_ARB_shading_language_100 |
| ctx->Extensions.ARB_shading_language_100 = GL_TRUE; |
| #endif |
| ctx->Extensions.EXT_stencil_two_side = GL_TRUE; |
| #if FEATURE_ARB_vertex_shader |
| ctx->Extensions.ARB_vertex_shader = GL_TRUE; |
| #endif |
| } |
| |
| |
| /** |
| * Enable all OpenGL 2.1 features and extensions. |
| * A convenience function to be called by drivers. |
| */ |
| void |
| _mesa_enable_2_1_extensions(struct gl_context *ctx) |
| { |
| #if FEATURE_EXT_pixel_buffer_object |
| ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE; |
| #endif |
| #if FEATURE_EXT_texture_sRGB |
| ctx->Extensions.EXT_texture_sRGB = GL_TRUE; |
| #endif |
| } |
| |
| |
| /** |
| * Either enable or disable the named extension. |
| * \return GL_TRUE for success, GL_FALSE if invalid extension name |
| */ |
| static GLboolean |
| set_extension( struct gl_context *ctx, const char *name, GLboolean state ) |
| { |
| size_t offset; |
| |
| if (ctx->Extensions.String) { |
| /* The string was already queried - can't change it now! */ |
| _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name); |
| return GL_FALSE; |
| } |
| |
| offset = name_to_offset(name); |
| if (offset == 0) { |
| _mesa_problem(ctx, "Trying to enable/disable unknown extension %s", |
| name); |
| return GL_FALSE; |
| } else if (offset == o(dummy_true) && state == GL_FALSE) { |
| _mesa_problem(ctx, "Trying to disable a permanently enabled extension: " |
| "%s", name); |
| return GL_FALSE; |
| } else { |
| GLboolean *base = (GLboolean *) &ctx->Extensions; |
| base[offset] = state; |
| return GL_TRUE; |
| } |
| } |
| |
| |
| /** |
| * Enable the named extension. |
| * Typically called by drivers. |
| */ |
| void |
| _mesa_enable_extension( struct gl_context *ctx, const char *name ) |
| { |
| if (!set_extension(ctx, name, GL_TRUE)) |
| _mesa_problem(ctx, "Trying to enable unknown extension: %s", name); |
| } |
| |
| |
| /** |
| * Disable the named extension. |
| * XXX is this really needed??? |
| */ |
| void |
| _mesa_disable_extension( struct gl_context *ctx, const char *name ) |
| { |
| if (!set_extension(ctx, name, GL_FALSE)) |
| _mesa_problem(ctx, "Trying to disable unknown extension: %s", name); |
| } |
| |
| |
| /** |
| * Test if the named extension is enabled in this context. |
| */ |
| GLboolean |
| _mesa_extension_is_enabled( struct gl_context *ctx, const char *name ) |
| { |
| size_t offset; |
| GLboolean *base; |
| |
| if (name == 0) |
| return GL_FALSE; |
| |
| offset = name_to_offset(name); |
| if (offset == 0) |
| return GL_FALSE; |
| base = (GLboolean *) &ctx->Extensions; |
| return base[offset]; |
| } |
| |
| |
| /** |
| * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable. |
| * |
| * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to |
| * enable or disable. The list is processed thus: |
| * - Enable recognized extension names that are prefixed with '+'. |
| * - Disable recognized extension names that are prefixed with '-'. |
| * - Enable recognized extension names that are not prefixed. |
| * - Collect unrecognized extension names in a new string. |
| * |
| * \return Space-separated list of unrecognized extension names (which must |
| * be freed). Does not return \c NULL. |
| */ |
| static char * |
| get_extension_override( struct gl_context *ctx ) |
| { |
| const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE"); |
| char *env; |
| char *ext; |
| char *extra_exts; |
| int len; |
| |
| if (env_const == NULL) { |
| /* Return the empty string rather than NULL. This simplifies the logic |
| * of client functions. */ |
| return calloc(4, sizeof(char)); |
| } |
| |
| /* extra_exts: List of unrecognized extensions. */ |
| extra_exts = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char)); |
| |
| /* Copy env_const because strtok() is destructive. */ |
| env = strdup(env_const); |
| for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) { |
| int enable; |
| int recognized; |
| switch (ext[0]) { |
| case '+': |
| enable = 1; |
| ++ext; |
| break; |
| case '-': |
| enable = 0; |
| ++ext; |
| break; |
| default: |
| enable = 1; |
| break; |
| } |
| recognized = set_extension(ctx, ext, enable); |
| if (!recognized) { |
| strcat(extra_exts, ext); |
| strcat(extra_exts, " "); |
| } |
| } |
| |
| free(env); |
| |
| /* Remove trailing space. */ |
| len = strlen(extra_exts); |
| if (len > 0 && extra_exts[len - 1] == ' ') |
| extra_exts[len - 1] = '\0'; |
| |
| return extra_exts; |
| } |
| |
| |
| /** |
| * \brief Initialize extension tables and enable default extensions. |
| * |
| * This should be called during context initialization. |
| * Note: Sets gl_extensions.dummy_true to true. |
| */ |
| void |
| _mesa_init_extensions( struct gl_context *ctx ) |
| { |
| GLboolean *base = (GLboolean *) &ctx->Extensions; |
| GLboolean *sentinel = base + o(extension_sentinel); |
| GLboolean *i; |
| const size_t *j; |
| |
| /* First, turn all extensions off. */ |
| for (i = base; i != sentinel; ++i) |
| *i = GL_FALSE; |
| |
| /* Then, selectively turn default extensions on. */ |
| ctx->Extensions.dummy_true = GL_TRUE; |
| for (j = default_extensions; *j != 0; ++j) |
| base[*j] = GL_TRUE; |
| } |
| |
| |
| typedef unsigned short extension_index; |
| |
| |
| /** |
| * Compare two entries of the extensions table. Sorts first by year, |
| * then by name. |
| * |
| * Arguments are indices into extension_table. |
| */ |
| static int |
| extension_compare(const void *p1, const void *p2) |
| { |
| extension_index i1 = * (const extension_index *) p1; |
| extension_index i2 = * (const extension_index *) p2; |
| const struct extension *e1 = &extension_table[i1]; |
| const struct extension *e2 = &extension_table[i2]; |
| int res; |
| |
| res = (int)e1->year - (int)e2->year; |
| |
| if (res == 0) { |
| res = strcmp(e1->name, e2->name); |
| } |
| |
| return res; |
| } |
| |
| |
| /** |
| * Construct the GL_EXTENSIONS string. Called the first time that |
| * glGetString(GL_EXTENSIONS) is called. |
| */ |
| GLubyte* |
| _mesa_make_extension_string(struct gl_context *ctx) |
| { |
| /* The extension string. */ |
| char *exts = 0; |
| /* Length of extension string. */ |
| size_t length = 0; |
| /* Number of extensions */ |
| unsigned count; |
| /* Indices of the extensions sorted by year */ |
| extension_index *extension_indices; |
| /* String of extra extensions. */ |
| char *extra_extensions = get_extension_override(ctx); |
| GLboolean *base = (GLboolean *) &ctx->Extensions; |
| const struct extension *i; |
| unsigned j; |
| unsigned maxYear = ~0; |
| |
| /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */ |
| { |
| const char *env = getenv("MESA_EXTENSION_MAX_YEAR"); |
| if (env) { |
| maxYear = atoi(env); |
| _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n", |
| maxYear); |
| } |
| } |
| |
| /* Compute length of the extension string. */ |
| count = 0; |
| for (i = extension_table; i->name != 0; ++i) { |
| if (base[i->offset] && |
| i->year <= maxYear && |
| (i->api_set & (1 << ctx->API))) { |
| length += strlen(i->name) + 1; /* +1 for space */ |
| ++count; |
| } |
| } |
| if (extra_extensions != NULL) |
| length += 1 + strlen(extra_extensions); /* +1 for space */ |
| |
| exts = (char *) calloc(ALIGN(length + 1, 4), sizeof(char)); |
| if (exts == NULL) { |
| free(extra_extensions); |
| return NULL; |
| } |
| |
| extension_indices = malloc(count * sizeof(extension_index)); |
| if (extension_indices == NULL) { |
| free(exts); |
| free(extra_extensions); |
| return NULL; |
| } |
| |
| /* Sort extensions in chronological order because certain old applications (e.g., |
| * Quake3 demo) store the extension list in a static size buffer so chronologically |
| * order ensure that the extensions that such applications expect will fit into |
| * that buffer. |
| */ |
| j = 0; |
| for (i = extension_table; i->name != 0; ++i) { |
| if (base[i->offset] && |
| i->year <= maxYear && |
| (i->api_set & (1 << ctx->API))) { |
| extension_indices[j++] = i - extension_table; |
| } |
| } |
| assert(j == count); |
| qsort(extension_indices, count, sizeof *extension_indices, extension_compare); |
| |
| /* Build the extension string.*/ |
| for (j = 0; j < count; ++j) { |
| i = &extension_table[extension_indices[j]]; |
| assert(base[i->offset] && (i->api_set & (1 << ctx->API))); |
| strcat(exts, i->name); |
| strcat(exts, " "); |
| } |
| free(extension_indices); |
| if (extra_extensions != 0) { |
| strcat(exts, extra_extensions); |
| free(extra_extensions); |
| } |
| |
| return (GLubyte *) exts; |
| } |
| |
| /** |
| * Return number of enabled extensions. |
| */ |
| GLuint |
| _mesa_get_extension_count(struct gl_context *ctx) |
| { |
| GLboolean *base; |
| const struct extension *i; |
| |
| /* only count once */ |
| if (ctx->Extensions.Count != 0) |
| return ctx->Extensions.Count; |
| |
| base = (GLboolean *) &ctx->Extensions; |
| for (i = extension_table; i->name != 0; ++i) { |
| if (base[i->offset] && (i->api_set & (1 << ctx->API))) { |
| ctx->Extensions.Count++; |
| } |
| } |
| return ctx->Extensions.Count; |
| } |
| |
| /** |
| * Return name of i-th enabled extension |
| */ |
| const GLubyte * |
| _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index) |
| { |
| const GLboolean *base; |
| size_t n; |
| const struct extension *i; |
| |
| base = (GLboolean*) &ctx->Extensions; |
| n = 0; |
| for (i = extension_table; i->name != 0; ++i) { |
| if (base[i->offset] && (i->api_set & (1 << ctx->API))) { |
| if (n == index) |
| return (const GLubyte*) i->name; |
| else |
| ++n; |
| } |
| } |
| |
| return NULL; |
| } |
