| /* $Id: extensions.c,v 1.44 2001/01/06 22:46:13 gareth 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 "mtypes.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) }, |
| { OFF, "GL_EXT_texture_env_dot3", F(EXT_texture_env_dot3) }, |
| { 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_MESA_sprite_point", F(MESA_sprite_point) }, |
| { 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) } |
| }; |
| |
| |
| |
| |
| /* |
| * 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(GLcontext *ctx) |
| { |
| gl_extensions_enable(ctx, "GL_ARB_texture_cube_map"); |
| gl_extensions_enable(ctx, "GL_EXT_bgra"); |
| gl_extensions_enable(ctx, "GL_EXT_texture_env_combine"); |
| gl_extensions_enable(ctx, "GL_EXT_texture_env_dot3"); |
| gl_extensions_enable(ctx, "GL_HP_occlusion_test"); |
| gl_extensions_enable(ctx, "GL_NV_blend_square"); |
| gl_extensions_enable(ctx, "GL_MESA_sprite_point"); |
| } |
| |
| |
| |
| 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; |
| if (t->flag) |
| *t->flag = enabled; |
| 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; |
| } |