/* $Id: extensions.c,v 1.39 2000/10/30 13:32:00 keithw Exp $ */ /* * Mesa 3-D graphics library * Version: 3.5 * * Copyright (C) 1999-2000 Brian Paul 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. */ #ifdef PC_HEADER #include "all.h" #else #include "glheader.h" #include "context.h" #include "extensions.h" #include "mem.h" #include "simple_list.h" #include "types.h" #endif #define MAX_EXT_NAMELEN 80 struct extension { struct extension *next, *prev; GLint enabled; GLboolean *flag; /* optional flag stored elsewhere */ char name[MAX_EXT_NAMELEN+1]; void (*notify)( GLcontext *, GLboolean ); }; #define F(x) (int)&(((struct gl_extensions *)0)->x) #define ON GL_TRUE #define OFF GL_FALSE static struct { GLboolean enabled; const char *name; int flag_offset; } default_extensions[] = { { ON, "GL_ARB_imaging", F(ARB_imaging) }, { ON, "GL_ARB_multitexture", F(ARB_multitexture) }, { OFF, "GL_ARB_texture_compression", F(ARB_texture_compression) }, { OFF, "GL_ARB_texture_cube_map", F(ARB_texture_cube_map) }, { ON, "GL_ARB_texture_env_add", F(ARB_texture_env_add) }, { ON, "GL_ARB_tranpose_matrix", 0 }, { ON, "GL_EXT_abgr", 0 }, { OFF, "GL_EXT_bgra", 0 }, { ON, "GL_EXT_blend_color", F(EXT_blend_color) }, { ON, "GL_EXT_blend_func_separate", F(EXT_blend_func_separate) }, { ON, "GL_EXT_blend_logic_op", F(EXT_blend_logic_op) }, { ON, "GL_EXT_blend_minmax", F(EXT_blend_minmax) }, { ON, "GL_EXT_blend_subtract", F(EXT_blend_subtract) }, { ON, "GL_EXT_clip_volume_hint", F(EXT_clip_volume_hint) }, { OFF, "GL_EXT_cull_vertex", 0 }, { ON, "GL_EXT_convolution", F(EXT_convolution) }, { ON, "GL_EXT_compiled_vertex_array", F(EXT_compiled_vertex_array) }, { ON, "GL_EXT_fog_coord", F(EXT_fog_coord) }, { ON, "GL_EXT_histogram", F(EXT_histogram) }, { ON, "GL_EXT_packed_pixels", F(EXT_packed_pixels) }, { ON, "GL_EXT_paletted_texture", F(EXT_paletted_texture) }, { ON, "GL_EXT_point_parameters", F(EXT_point_parameters) }, { ON, "GL_EXT_polygon_offset", F(EXT_polygon_offset) }, { ON, "GL_EXT_rescale_normal", F(EXT_rescale_normal) }, { ON, "GL_EXT_secondary_color", F(EXT_secondary_color) }, { ON, "GL_EXT_shared_texture_palette", F(EXT_shared_texture_palette) }, { ON, "GL_EXT_stencil_wrap", F(EXT_stencil_wrap) }, { ON, "GL_EXT_texture3D", F(EXT_texture3D) }, { OFF, "GL_EXT_texture_compression_s3tc", F(EXT_texture_compression_s3tc) }, { ON, "GL_EXT_texture_env_add", F(EXT_texture_env_add) }, { OFF, "GL_EXT_texture_env_combine", F(EXT_texture_env_combine) }, { ON, "GL_EXT_texture_object", F(EXT_texture_object) }, { ON, "GL_EXT_texture_lod_bias", F(EXT_texture_lod_bias) }, { ON, "GL_EXT_vertex_array", 0 }, { OFF, "GL_EXT_vertex_array_set", F(EXT_vertex_array_set) }, { OFF, "GL_HP_occlusion_test", F(HP_occlusion_test) }, { ON, "GL_INGR_blend_func_separate", F(INGR_blend_func_separate) }, { ON, "GL_MESA_window_pos", F(MESA_window_pos) }, { ON, "GL_MESA_resize_buffers", F(MESA_resize_buffers) }, { OFF, "GL_NV_blend_square", F(NV_blend_square) }, { ON, "GL_NV_texgen_reflection", F(NV_texgen_reflection) }, { ON, "GL_PGI_misc_hints", F(PGI_misc_hints) }, { ON, "GL_SGI_color_matrix", F(SGI_color_matrix) }, { ON, "GL_SGI_color_table", F(SGI_color_table) }, { ON, "GL_SGIS_pixel_texture", F(SGIS_pixel_texture) }, { ON, "GL_SGIS_texture_edge_clamp", F(SGIS_texture_edge_clamp) }, { ON, "GL_SGIX_pixel_texture", F(SGIX_pixel_texture) }, { OFF, "GL_3DFX_texture_compression_FXT1", F(_3DFX_texture_compression_FXT1) } }; int gl_extensions_add( GLcontext *ctx, GLboolean enabled, const char *name, GLboolean *flag_ptr ) { if (ctx->Extensions.ext_string == 0) { struct extension *t = MALLOC_STRUCT(extension); t->enabled = enabled; strncpy(t->name, name, MAX_EXT_NAMELEN); t->name[MAX_EXT_NAMELEN] = 0; t->flag = flag_ptr; insert_at_tail( ctx->Extensions.ext_list, t ); return 0; } return 1; } /* * Either enable or disable the named extension. */ static int set_extension( GLcontext *ctx, const char *name, GLint state ) { struct extension *i; foreach( i, ctx->Extensions.ext_list ) if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0) break; if (i == ctx->Extensions.ext_list) return 1; if (i->flag) *(i->flag) = state; i->enabled = state; return 0; } int gl_extensions_enable( GLcontext *ctx, const char *name ) { if (ctx->Extensions.ext_string == 0) return set_extension( ctx, name, 1 ); return 1; } int gl_extensions_disable( GLcontext *ctx, const char *name ) { if (ctx->Extensions.ext_string == 0) return set_extension( ctx, name, 0 ); return 1; } /* * Test if the named extension is enabled in this context. */ GLboolean gl_extension_is_enabled( GLcontext *ctx, const char *name) { struct extension *i; foreach( i, ctx->Extensions.ext_list ) if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0) { if (i->enabled) return GL_TRUE; else return GL_FALSE; } return GL_FALSE; } void gl_extensions_dtr( GLcontext *ctx ) { struct extension *i, *nexti; if (ctx->Extensions.ext_string) { FREE( ctx->Extensions.ext_string ); ctx->Extensions.ext_string = 0; } if (ctx->Extensions.ext_list) { foreach_s( i, nexti, ctx->Extensions.ext_list ) { remove_from_list( i ); FREE( i ); } FREE(ctx->Extensions.ext_list); ctx->Extensions.ext_list = 0; } } void gl_extensions_ctr( GLcontext *ctx ) { GLuint i; GLboolean *base = (GLboolean *)&ctx->Extensions; ctx->Extensions.ext_string = 0; ctx->Extensions.ext_list = MALLOC_STRUCT(extension); make_empty_list( ctx->Extensions.ext_list ); for (i = 0 ; i < Elements(default_extensions) ; i++) { GLboolean *ptr = 0; if (default_extensions[i].flag_offset) ptr = base + default_extensions[i].flag_offset; gl_extensions_add( ctx, default_extensions[i].enabled, default_extensions[i].name, ptr); } } const char *gl_extensions_get_string( GLcontext *ctx ) { if (ctx->Extensions.ext_string == 0) { struct extension *i; char *str; GLuint len = 0; foreach (i, ctx->Extensions.ext_list) if (i->enabled) len += strlen(i->name) + 1; if (len == 0) return ""; str = (char *)MALLOC(len * sizeof(char)); ctx->Extensions.ext_string = str; foreach (i, ctx->Extensions.ext_list) if (i->enabled) { strcpy(str, i->name); str += strlen(str); *str++ = ' '; } *(str-1) = 0; } return ctx->Extensions.ext_string; }