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/* $Id: extensions.c,v 1.23 2000/04/08 18:57:45 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" },
{ DEFAULT_ON, "GL_ARB_multitexture" },
{ ALWAYS_ENABLED, "GL_ARB_tranpose_matrix" },
{ ALWAYS_ENABLED, "GL_EXT_abgr" },
{ DEFAULT_ON, "GL_EXT_blend_color" },
{ 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_ON, "GL_EXT_compiled_vertex_array" },
{ 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_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");
}
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;
}
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