| /* $Id: extensions.c,v 1.1 1999/08/19 00:55:41 jtg Exp $ */ |
| |
| /* |
| * Mesa 3-D graphics library |
| * Version: 3.1 |
| * |
| * Copyright (C) 1999 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. |
| */ |
| |
| |
| #include <stdlib.h> |
| #include "extensions.h" |
| #include "simple_list.h" |
| #include "types.h" |
| |
| #define MAX_EXT_NAMELEN 80 |
| #define MALLOC_STRUCT(T) (struct T *) malloc( sizeof(struct T) ) |
| |
| struct extension { |
| struct extension *next, *prev; |
| int enabled; |
| char name[MAX_EXT_NAMELEN+1]; |
| void (*notify)( GLcontext *, GLboolean ); |
| }; |
| |
| |
| |
| static struct { int enabled; const char *name; } default_extensions[] = { |
| { ALWAYS_ENABLED, "GL_EXT_blend_color" }, |
| { ALWAYS_ENABLED, "GL_EXT_blend_minmax" }, |
| { ALWAYS_ENABLED, "GL_EXT_blend_logic_op" }, |
| { ALWAYS_ENABLED, "GL_EXT_blend_subtract" }, |
| { ALWAYS_ENABLED, "GL_EXT_paletted_texture" }, |
| { DEFAULT_ON, "GL_EXT_point_parameters" }, |
| { ALWAYS_ENABLED, "GL_EXT_polygon_offset" }, |
| { ALWAYS_ENABLED, "GL_EXT_vertex_array" }, |
| { ALWAYS_ENABLED, "GL_EXT_texture_object" }, |
| { DEFAULT_ON, "GL_EXT_texture3D" }, |
| { ALWAYS_ENABLED, "GL_MESA_window_pos" }, |
| { ALWAYS_ENABLED, "GL_MESA_resize_buffers" }, |
| { ALWAYS_ENABLED, "GL_EXT_shared_texture_palette" }, |
| { ALWAYS_ENABLED, "GL_EXT_rescale_normal" }, |
| { ALWAYS_ENABLED, "GL_EXT_abgr" }, |
| { ALWAYS_ENABLED, "GL_SGIS_texture_edge_clamp" }, |
| { ALWAYS_ENABLED, "GL_EXT_stencil_wrap" }, |
| { ALWAYS_ENABLED, "GL_INGR_blend_func_separate" }, |
| { DEFAULT_ON, "GL_ARB_multitexture" }, |
| { ALWAYS_ENABLED, "GL_NV_texgen_reflection" }, |
| { DEFAULT_ON, "GL_PGI_misc_hints" }, |
| { DEFAULT_ON, "GL_EXT_compiled_vertex_array" }, |
| { DEFAULT_OFF, "GL_EXT_vertex_array_set" }, |
| { DEFAULT_ON, "GL_EXT_clip_volume_hint" }, |
| }; |
| |
| |
| int gl_extensions_add( GLcontext *ctx, |
| int state, |
| const char *name, |
| void (*notify)() ) |
| { |
| (void) notify; |
| |
| if (ctx->Extensions.ext_string == 0) |
| { |
| struct extension *t = MALLOC_STRUCT(extension); |
| t->enabled = state; |
| strncpy(t->name, name, MAX_EXT_NAMELEN); |
| t->name[MAX_EXT_NAMELEN] = 0; |
| t->notify = (void (*)(GLcontext *, GLboolean)) notify; |
| insert_at_tail( ctx->Extensions.ext_list, t ); |
| return 0; |
| } |
| return 1; |
| } |
| |
| |
| static int set_extension( GLcontext *ctx, const char *name, GLuint 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->enabled && !(i->enabled & ALWAYS_ENABLED)) |
| { |
| if (i->notify) i->notify( ctx, 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; |
| } |
| |
| |
| 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 ) { |
| free( i ); |
| } |
| |
| free(ctx->Extensions.ext_list); |
| ctx->Extensions.ext_list = 0; |
| } |
| } |
| |
| |
| void gl_extensions_ctr( GLcontext *ctx ) |
| { |
| GLuint i; |
| |
| 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++) { |
| gl_extensions_add( ctx, |
| default_extensions[i].enabled, |
| default_extensions[i].name, |
| 0 ); |
| } |
| } |
| |
| |
| 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; |
| } |
| |
| |