/* * 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(dummy_true), 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_alignment", o(ARB_map_buffer_alignment), GL, 2011 }, { "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(dummy_true), 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(dummy_true), 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(dummy_true), 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(dummy_true), 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_map_buffer_range", o(ARB_map_buffer_range), ES1 | ES2, 2012 }, { "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(dummy_true), 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_ANGLE_texture_compression_dxt3", o(ANGLE_texture_compression_dxt), ES2, 2011 }, { "GL_ANGLE_texture_compression_dxt5", o(ANGLE_texture_compression_dxt), ES2, 2011 }, { "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 }, { "GL_OES_draw_texture", o(OES_draw_texture), ES1, 2004 }, /* 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 }, { "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), GL, 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(dummy_true), 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_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), GL, 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_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(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_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; ctx->Extensions.ARB_fragment_program = GL_TRUE; ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE; ctx->Extensions.ARB_fragment_shader = GL_TRUE; ctx->Extensions.ARB_framebuffer_object = GL_TRUE; /* XXX re-enable when GLSL compiler again supports geometry shaders */ #if 0 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; ctx->Extensions.ARB_occlusion_query = GL_TRUE; ctx->Extensions.ARB_occlusion_query2 = GL_TRUE; ctx->Extensions.ARB_point_sprite = GL_TRUE; ctx->Extensions.ARB_shader_objects = GL_TRUE; ctx->Extensions.EXT_separate_shader_objects = GL_TRUE; ctx->Extensions.ARB_shading_language_100 = GL_TRUE; 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; ctx->Extensions.ARB_vertex_program = GL_TRUE; ctx->Extensions.ARB_vertex_shader = GL_TRUE; ctx->Extensions.ARB_sync = GL_TRUE; ctx->Extensions.APPLE_object_purgeable = GL_TRUE; ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE; ctx->Extensions.ATI_fragment_shader = GL_TRUE; 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; ctx->Extensions.EXT_framebuffer_object = GL_TRUE; ctx->Extensions.EXT_framebuffer_blit = GL_TRUE; ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE; ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE; ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE; 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; ctx->Extensions.EXT_texture_sRGB = GL_TRUE; ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE; ctx->Extensions.EXT_texture_swizzle = GL_TRUE; /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/ 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;*/ ctx->Extensions.NV_fragment_program_option = GL_TRUE; ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE; _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1"); if (ctx->Mesa_DXTn) { ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE; _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc"); _mesa_enable_extension(ctx, "GL_S3_s3tc"); } } /** * 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; } /** * 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.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) { ctx->Extensions.ARB_fragment_shader = GL_TRUE; 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; ctx->Extensions.ARB_shader_objects = GL_TRUE; ctx->Extensions.ARB_shading_language_100 = GL_TRUE; ctx->Extensions.EXT_stencil_two_side = GL_TRUE; ctx->Extensions.ARB_vertex_shader = GL_TRUE; } /** * 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) { ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE; ctx->Extensions.EXT_texture_sRGB = GL_TRUE; } /** * 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 = 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; }