/*
* 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 "mtypes.h"
enum {
DISABLE = 0,
GL = 1 << API_OPENGL,
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;
};
/**
* 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.
*
* Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
*/
static const struct extension extension_table[] = {
/* ARB Extensions */
{ "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility), GL },
{ "GL_ARB_blend_func_extended", o(ARB_blend_func_extended), GL },
{ "GL_ARB_copy_buffer", o(ARB_copy_buffer), GL },
{ "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float), GL },
{ "GL_ARB_depth_clamp", o(ARB_depth_clamp), GL },
{ "GL_ARB_depth_texture", o(ARB_depth_texture), GL },
{ "GL_ARB_draw_buffers", o(ARB_draw_buffers), GL },
{ "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex), GL },
{ "GL_ARB_draw_instanced", o(ARB_draw_instanced), GL },
{ "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location), GL },
{ "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions), GL },
{ "GL_ARB_fragment_program", o(ARB_fragment_program), GL },
{ "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow), GL },
{ "GL_ARB_fragment_shader", o(ARB_fragment_shader), GL },
{ "GL_ARB_framebuffer_object", o(ARB_framebuffer_object), GL },
{ "GL_ARB_half_float_pixel", o(ARB_half_float_pixel), GL },
{ "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL },
{ "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL },
{ "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL },
{ "GL_ARB_multisample", o(ARB_multisample), GL },
{ "GL_ARB_multitexture", o(ARB_multitexture), GL },
{ "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL },
{ "GL_ARB_occlusion_query", o(ARB_occlusion_query), GL },
{ "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
{ "GL_ARB_point_parameters", o(EXT_point_parameters), GL },
{ "GL_ARB_point_sprite", o(ARB_point_sprite), GL },
{ "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL },
{ "GL_ARB_sampler_objects", o(ARB_sampler_objects), GL },
{ "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL },
{ "GL_ARB_shader_objects", o(ARB_shader_objects), GL },
{ "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL },
{ "GL_ARB_shading_language_100", o(ARB_shading_language_100), GL },
{ "GL_ARB_shadow_ambient", o(ARB_shadow_ambient), GL },
{ "GL_ARB_shadow", o(ARB_shadow), GL },
{ "GL_ARB_sync", o(ARB_sync), GL },
{ "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GL },
{ "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GL },
{ "GL_ARB_texture_compression", o(ARB_texture_compression), GL },
{ "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
{ "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GL },
{ "GL_ARB_texture_env_add", o(EXT_texture_env_add), GL },
{ "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GL },
{ "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GL },
{ "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GL },
{ "GL_ARB_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
{ "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL },
{ "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL },
{ "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL },
{ "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL },
{ "GL_ARB_texture_rg", o(ARB_texture_rg), GL },
{ "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL },
{ "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL },
{ "GL_ARB_transpose_matrix", o(ARB_transpose_matrix), GL },
{ "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL },
{ "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
{ "GL_ARB_vertex_array_object", o(ARB_vertex_array_object), GL },
{ "GL_ARB_vertex_buffer_object", o(ARB_vertex_buffer_object), GL },
{ "GL_ARB_vertex_program", o(ARB_vertex_program), GL },
{ "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL },
{ "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL },
{ "GL_ARB_window_pos", o(ARB_window_pos), GL },
/* EXT extensions */
{ "GL_EXT_abgr", o(EXT_abgr), GL },
{ "GL_EXT_bgra", o(EXT_bgra), GL },
{ "GL_EXT_blend_color", o(EXT_blend_color), GL },
{ "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL },
{ "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GL },
{ "GL_EXT_blend_logic_op", o(EXT_blend_logic_op), GL },
{ "GL_EXT_blend_minmax", o(EXT_blend_minmax), GL | ES1 | ES2 },
{ "GL_EXT_blend_subtract", o(EXT_blend_subtract), GL },
{ "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL },
{ "GL_EXT_compiled_vertex_array", o(EXT_compiled_vertex_array), GL },
{ "GL_EXT_copy_texture", o(EXT_copy_texture), GL },
{ "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL },
{ "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL },
{ "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL },
{ "GL_EXT_draw_range_elements", o(EXT_draw_range_elements), GL },
{ "GL_EXT_fog_coord", o(EXT_fog_coord), GL },
{ "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL },
{ "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL },
{ "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL },
{ "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL },
{ "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GL },
{ "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL },
{ "GL_EXT_multi_draw_arrays", o(EXT_multi_draw_arrays), GL | ES1 | ES2 },
{ "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
{ "GL_EXT_packed_float", o(EXT_packed_float), GL },
{ "GL_EXT_packed_pixels", o(EXT_packed_pixels), GL },
{ "GL_EXT_paletted_texture", o(EXT_paletted_texture), GL },
{ "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
{ "GL_EXT_point_parameters", o(EXT_point_parameters), GL },
{ "GL_EXT_polygon_offset", o(EXT_polygon_offset), GL },
{ "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL },
{ "GL_EXT_rescale_normal", o(EXT_rescale_normal), GL },
{ "GL_EXT_secondary_color", o(EXT_secondary_color), GL },
{ "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GL },
{ "GL_EXT_separate_specular_color", o(EXT_separate_specular_color), GL },
{ "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GL },
{ "GL_EXT_shared_texture_palette", o(EXT_shared_texture_palette), GL },
{ "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GL },
{ "GL_EXT_stencil_wrap", o(EXT_stencil_wrap), GL },
{ "GL_EXT_subtexture", o(EXT_subtexture), GL },
{ "GL_EXT_texture3D", o(EXT_texture3D), GL },
{ "GL_EXT_texture_array", o(EXT_texture_array), GL },
{ "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL | ES1 | ES2 },
{ "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
{ "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL },
{ "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GL },
{ "GL_EXT_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
{ "GL_EXT_texture_env_add", o(EXT_texture_env_add), GL },
{ "GL_EXT_texture_env_combine", o(EXT_texture_env_combine), GL },
{ "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GL },
{ "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2 },
{ "GL_EXT_texture_format_BGRA8888", o(EXT_texture_format_BGRA8888), ES1 | ES2 },
{ "GL_EXT_texture_integer", o(EXT_texture_integer), GL },
{ "GL_EXT_texture_lod_bias", o(EXT_texture_lod_bias), GL | ES1 },
{ "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL },
{ "GL_EXT_texture_object", o(EXT_texture_object), GL },
{ "GL_EXT_texture", o(EXT_texture), GL },
{ "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GL },
{ "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL },
{ "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL },
{ "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL },
{ "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2 },
{ "GL_EXT_timer_query", o(EXT_timer_query), GL },
{ "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL },
{ "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
{ "GL_EXT_vertex_array", o(EXT_vertex_array), GL },
{ "GL_EXT_vertex_array_set", o(EXT_vertex_array_set), GL },
/* OES extensions */
{ "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1 },
{ "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1 },
{ "GL_OES_blend_subtract", o(EXT_blend_subtract), ES1 },
{ "GL_OES_byte_coordinates", o(dummy_true), ES1 },
{ "GL_OES_compressed_paletted_texture", o(dummy_false), DISABLE },
{ "GL_OES_depth24", o(EXT_framebuffer_object), ES1 | ES2 },
{ "GL_OES_depth32", o(dummy_false), DISABLE },
{ "GL_OES_depth_texture", o(ARB_depth_texture), ES2 },
#if FEATURE_OES_draw_texture
{ "GL_OES_draw_texture", o(OES_draw_texture), ES1 | ES2 },
#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 },
#endif
{ "GL_OES_element_index_uint", o(EXT_vertex_array), ES1 | ES2 },
{ "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 | ES2 },
{ "GL_OES_fixed_point", o(dummy_true), ES1 },
{ "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1 },
{ "GL_OES_mapbuffer", o(ARB_vertex_buffer_object), ES1 | ES2 },
{ "GL_OES_matrix_get", o(dummy_true), ES1 },
{ "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2 },
{ "GL_OES_point_size_array", o(dummy_true), ES1 },
{ "GL_OES_point_sprite", o(ARB_point_sprite), ES1 },
{ "GL_OES_query_matrix", o(dummy_true), ES1 },
{ "GL_OES_read_format", o(OES_read_format), GL | ES1 },
{ "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 | ES2 },
{ "GL_OES_single_precision", o(dummy_true), ES1 },
{ "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2 },
{ "GL_OES_stencil1", o(dummy_false), DISABLE },
{ "GL_OES_stencil4", o(dummy_false), DISABLE },
{ "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 | ES2 },
{ "GL_OES_stencil_wrap", o(EXT_stencil_wrap), ES1 },
/* GL_OES_texture_3D is disabled due to missing GLSL support. */
{ "GL_OES_texture_3D", o(EXT_texture3D), DISABLE },
{ "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1 },
{ "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1 },
{ "GL_OES_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), ES1 },
{ "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2 },
/* Vendor extensions */
{ "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL },
{ "GL_APPLE_client_storage", o(APPLE_client_storage), GL },
{ "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL },
{ "GL_APPLE_packed_pixels", o(APPLE_packed_pixels), GL },
{ "GL_APPLE_vertex_array_object", o(APPLE_vertex_array_object), GL },
{ "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL },
{ "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GL },
{ "GL_ATI_fragment_shader", o(ATI_fragment_shader), GL },
{ "GL_ATI_separate_stencil", o(ATI_separate_stencil), GL },
{ "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GL },
{ "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL },
{ "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays), GL },
{ "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip), GL },
{ "GL_IBM_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
{ "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GL },
{ "GL_MESA_pack_invert", o(MESA_pack_invert), GL },
{ "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL },
{ "GL_MESA_texture_array", o(MESA_texture_array), GL },
{ "GL_MESA_texture_signed_rgba", o(MESA_texture_signed_rgba), GL },
{ "GL_MESA_window_pos", o(ARB_window_pos), GL },
{ "GL_MESAX_texture_float", o(ARB_texture_float), GL },
{ "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL },
{ "GL_NV_blend_square", o(NV_blend_square), GL },
{ "GL_NV_conditional_render", o(NV_conditional_render), GL },
{ "GL_NV_depth_clamp", o(ARB_depth_clamp), GL },
{ "GL_NV_fragment_program", o(NV_fragment_program), GL },
{ "GL_NV_fragment_program_option", o(NV_fragment_program_option), GL },
{ "GL_NV_light_max_exponent", o(NV_light_max_exponent), GL },
{ "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
{ "GL_NV_point_sprite", o(NV_point_sprite), GL },
{ "GL_NV_primitive_restart", o(NV_primitive_restart), GL },
{ "GL_NV_texgen_reflection", o(NV_texgen_reflection), GL },
{ "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GL },
{ "GL_NV_texture_rectangle", o(NV_texture_rectangle), GL },
{ "GL_NV_vertex_program1_1", o(NV_vertex_program1_1), GL },
{ "GL_NV_vertex_program", o(NV_vertex_program), GL },
{ "GL_S3_s3tc", o(S3_s3tc), GL },
{ "GL_SGIS_generate_mipmap", o(SGIS_generate_mipmap), GL },
{ "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GL },
{ "GL_SGIS_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
{ "GL_SGIS_texture_lod", o(SGIS_texture_lod), GL },
{ "GL_SGI_texture_color_table", o(SGI_texture_color_table), GL },
{ "GL_SUN_multi_draw_arrays", o(EXT_multi_draw_arrays), GL },
{ 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_draw_buffers),
o(ARB_multisample),
o(ARB_texture_compression),
o(ARB_transpose_matrix),
o(ARB_vertex_buffer_object),
o(ARB_window_pos),
o(EXT_abgr),
o(EXT_bgra),
o(EXT_compiled_vertex_array),
o(EXT_copy_texture),
o(EXT_draw_range_elements),
o(EXT_multi_draw_arrays),
o(EXT_packed_pixels),
o(EXT_polygon_offset),
o(EXT_rescale_normal),
o(EXT_separate_specular_color),
o(EXT_subtexture),
o(EXT_texture),
o(EXT_texture3D),
o(EXT_texture_object),
o(EXT_vertex_array),
o(OES_read_format),
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_generate_mipmap),
o(SGIS_texture_edge_clamp),
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_buffers = GL_TRUE;*/
ctx->Extensions.ARB_draw_elements_base_vertex = 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;
ctx->Extensions.ARB_multitexture = GL_TRUE;
#if FEATURE_queryobj
ctx->Extensions.ARB_occlusion_query = 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_shadow_ambient = 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_mirrored_repeat = GL_TRUE;
ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
ctx->Extensions.ARB_texture_rg = GL_TRUE;
ctx->Extensions.ARB_vertex_array_object = 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_vertex_buffer_object
/*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
#endif
#if FEATURE_ARB_sync
ctx->Extensions.ARB_sync = GL_TRUE;
#endif
ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
#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_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_logic_op = GL_TRUE;
ctx->Extensions.EXT_blend_minmax = GL_TRUE;
ctx->Extensions.EXT_blend_subtract = 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
#if FEATURE_ARB_framebuffer_object
ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
#endif
/*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
ctx->Extensions.EXT_paletted_texture = 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_shared_texture_palette = GL_TRUE;
ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
ctx->Extensions.EXT_texture_array = GL_TRUE;
ctx->Extensions.EXT_texture_env_add = GL_TRUE;
ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
#if FEATURE_EXT_texture_sRGB
ctx->Extensions.EXT_texture_sRGB = 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
ctx->Extensions.SGI_texture_color_table = GL_TRUE;
/*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
#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 common EXT extensions in the ARB_imaging subset.
*/
void
_mesa_enable_imaging_extensions(struct gl_context *ctx)
{
ctx->Extensions.EXT_blend_color = GL_TRUE;
ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
ctx->Extensions.EXT_blend_minmax = GL_TRUE;
ctx->Extensions.EXT_blend_subtract = GL_TRUE;
}
/**
* 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_multisample = GL_TRUE;*/
ctx->Extensions.ARB_multitexture = GL_TRUE;
ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
/*ctx->Extensions.ARB_texture_compression = 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.EXT_texture_env_add = 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_texture_mirrored_repeat = 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_blend_subtract = GL_TRUE;
ctx->Extensions.EXT_fog_coord = GL_TRUE;
/*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
ctx->Extensions.EXT_point_parameters = GL_TRUE;
ctx->Extensions.EXT_secondary_color = GL_TRUE;
ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
/*ctx->Extensions.SGIS_generate_mipmap = 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.ARB_vertex_buffer_object = 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_draw_buffers = GL_TRUE;*/
#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];
}
/**
* Append string 'b' onto string 'a'. Free 'a' and return new string.
*/
static char *
append(const char *a, const char *b)
{
const GLuint aLen
= a
? strlen(a
) : 0;
const GLuint bLen
= b
? strlen(b
) : 0;
char *s
= calloc(1, aLen
+ bLen
+ 1);
if (s) {
if (a)
if (b)
s[aLen + bLen] = '\0';
}
if (a)
return s;
}
/**
* Check the MESA_EXTENSION_OVERRIDE env var.
* For extension names that are recognized, turn them on. For extension
* names that are recognized and prefixed with '-', turn them off.
* Return a string of the unknown/leftover names.
*
* Returnd string needs to be freed.
*/
static char *
get_extension_override( struct gl_context *ctx )
{
const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
char *extraExt = NULL;
char ext[1000];
GLuint extLen = 0;
GLuint i;
GLboolean disableExt = GL_FALSE;
if (!envExt)
return NULL;
for (i = 0; ; i++) {
if (envExt[i] == '\0' || envExt[i] == ' ') {
/* terminate/process 'ext' if extLen > 0 */
if (extLen > 0) {
/* enable extension named by 'ext' */
ext[extLen] = 0;
if (!set_extension(ctx, ext, !disableExt)) {
/* unknown extension name, append it to extraExt */
if (extraExt) {
extraExt = append(extraExt, " ");
}
extraExt = append(extraExt, ext);
}
extLen = 0;
disableExt = GL_FALSE;
}
if (envExt[i] == '\0')
break;
}
else if (envExt[i] == '-') {
disableExt = GL_TRUE;
}
else {
/* accumulate this non-space character */
ext[extLen++] = envExt[i];
}
}
return extraExt;
}
/**
* \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;
}
/**
* 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;
/* String of extra extensions. */
char *extra_extensions = get_extension_override(ctx);
GLboolean *base = (GLboolean *) &ctx->Extensions;
const struct extension *i;
/* Compute length of the extension string. */
for (i = extension_table; i->name != 0; ++i) {
if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
length
+= strlen(i
->name
) + 1; /* +1 for space */
}
}
if (extra_extensions != NULL)
length
+= 1 + strlen(extra_extensions
); /* +1 for space */
exts
= (char *) calloc(length
+ 1, sizeof(char));
if (exts == NULL) {
return NULL;
}
/* Build the extension string.*/
for (i = extension_table; i->name != 0; ++i) {
if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
}
}
if (extra_extensions != 0) {
strcat(exts
, 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]) {
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;
if (index < 0)
return NULL;
base = (GLboolean*) &ctx->Extensions;
n = 0;
for (i = extension_table; i->name != 0; ++i) {
if (n == index && base[i->offset]) {
return (GLubyte*) i->name;
} else if (base[i->offset]) {
++n;
}
}
return NULL;
}