/* $Id: extensions.c,v 1.28 2000/05/23 20:10:49 brianp Exp $ */ /* * Mesa 3-D graphics library * Version: 3.3 * * 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; char name[MAX_EXT_NAMELEN+1]; void (*notify)( GLcontext *, GLboolean ); }; static struct { int enabled; const char *name; } default_extensions[] = { { DEFAULT_OFF, "GL_ARB_imaging" }, /* in progress */ { DEFAULT_ON, "GL_ARB_multitexture" }, { DEFAULT_OFF, "GL_ARB_texture_compression" }, /* in progress */ { DEFAULT_OFF, "GL_ARB_texture_cube_map" }, /* in progress */ { ALWAYS_ENABLED, "GL_ARB_tranpose_matrix" }, { ALWAYS_ENABLED, "GL_EXT_abgr" }, { DEFAULT_ON, "GL_EXT_blend_color" }, { DEFAULT_ON, "GL_EXT_blend_func_separate" }, { DEFAULT_ON, "GL_EXT_blend_logic_op" }, { DEFAULT_ON, "GL_EXT_blend_minmax" }, { DEFAULT_ON, "GL_EXT_blend_subtract" }, { DEFAULT_ON, "GL_EXT_clip_volume_hint" }, { DEFAULT_OFF, "GL_EXT_convolution" }, /* in progress */ { DEFAULT_ON, "GL_EXT_compiled_vertex_array" }, { DEFAULT_ON, "GL_EXT_histogram" }, { DEFAULT_ON, "GL_EXT_paletted_texture" }, { DEFAULT_ON, "GL_EXT_point_parameters" }, { ALWAYS_ENABLED, "GL_EXT_polygon_offset" }, { ALWAYS_ENABLED, "GL_EXT_rescale_normal" }, { DEFAULT_ON, "GL_EXT_shared_texture_palette" }, { ALWAYS_ENABLED, "GL_EXT_stencil_wrap" }, { DEFAULT_ON, "GL_EXT_texture3D" }, { DEFAULT_OFF, "GL_EXT_texture_env" }, { DEFAULT_ON, "GL_EXT_texture_env_add" }, { ALWAYS_ENABLED, "GL_EXT_texture_object" }, { DEFAULT_ON, "GL_EXT_texture_lod_bias" }, { ALWAYS_ENABLED, "GL_EXT_vertex_array" }, { DEFAULT_OFF, "GL_EXT_vertex_array_set" }, { DEFAULT_OFF, "GL_HP_occlusion_test" }, { DEFAULT_ON, "GL_INGR_blend_func_separate" }, { ALWAYS_ENABLED, "GL_MESA_window_pos" }, { ALWAYS_ENABLED, "GL_MESA_resize_buffers" }, { ALWAYS_ENABLED, "GL_NV_texgen_reflection" }, { DEFAULT_ON, "GL_PGI_misc_hints" }, { DEFAULT_ON, "GL_SGI_color_matrix" }, { DEFAULT_ON, "GL_SGI_color_table" }, { DEFAULT_ON, "GL_SGIS_pixel_texture" }, { DEFAULT_ON, "GL_SGIS_texture_edge_clamp" }, { DEFAULT_ON, "GL_SGIX_pixel_texture" } }; /* * Update the boolean convenience flags in the Extensions struct. */ static void update_extension_flags( GLcontext *ctx ) { /* Update flags */ ctx->Extensions.HaveTextureEnvAdd = gl_extension_is_enabled(ctx, "GL_EXT_texture_env_add"); ctx->Extensions.HaveTextureLodBias = gl_extension_is_enabled(ctx, "GL_EXT_texture_lod_bias"); ctx->Extensions.HaveHpOcclusionTest = gl_extension_is_enabled(ctx, "GL_HP_occlusion_test"); ctx->Extensions.HaveTextureCubeMap = gl_extension_is_enabled(ctx, "GL_ARB_texture_cube_map"); ctx->Extensions.HaveTextureCompression = gl_extension_is_enabled(ctx, "GL_ARB_texture_compression"); } int gl_extensions_add( GLcontext *ctx, int state, const char *name, void (*notify)(void) ) { (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; } /* * 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->enabled & ALWAYS_ENABLED)) { if (i->notify) i->notify( ctx, state ); i->enabled = state; } update_extension_flags(ctx); 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; 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 ); } update_extension_flags(ctx); } 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; }