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/*
* Mesa 3-D graphics library
* Version: 7.5
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (C) 2009 VMware, Inc. 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.
*/
#ifndef LIGHT_H
#define LIGHT_H
#include "glheader.h"
#include "mfeatures.h"
struct gl_context;
struct gl_light;
struct gl_material;
extern void GLAPIENTRY
_mesa_ShadeModel( GLenum mode );
extern void GLAPIENTRY
_mesa_ProvokingVertexEXT(GLenum mode);
#if _HAVE_FULL_GL
extern void GLAPIENTRY
_mesa_ColorMaterial( GLenum face, GLenum mode );
extern void GLAPIENTRY
_mesa_Lightf( GLenum light, GLenum pname, GLfloat param );
extern void GLAPIENTRY
_mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params );
extern void GLAPIENTRY
_mesa_Lightiv( GLenum light, GLenum pname, const GLint *params );
extern void GLAPIENTRY
_mesa_Lighti( GLenum light, GLenum pname, GLint param );
extern void GLAPIENTRY
_mesa_LightModelf( GLenum pname, GLfloat param );
extern void GLAPIENTRY
_mesa_LightModelfv( GLenum pname, const GLfloat *params );
extern void GLAPIENTRY
_mesa_LightModeli( GLenum pname, GLint param );
extern void GLAPIENTRY
_mesa_LightModeliv( GLenum pname, const GLint *params );
extern void GLAPIENTRY
_mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params );
extern void GLAPIENTRY
_mesa_GetLightiv( GLenum light, GLenum pname, GLint *params );
extern void GLAPIENTRY
_mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params );
extern void GLAPIENTRY
_mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params );
extern void
_mesa_light(struct gl_context *ctx, GLuint lnum, GLenum pname, const GLfloat *params);
/*
* Compute dp ^ SpecularExponent.
* Lerp between adjacent values in the f(x) lookup table, giving a
* continuous function, with adequate overall accuracy. (Though still
* pretty good compared to a straight lookup).
*/
static inline GLfloat
_mesa_lookup_shininess(const struct gl_context *ctx, GLuint face, GLfloat dp)
{
const struct gl_shine_tab *tab = ctx->_ShineTable[face];
float f = dp * (SHINE_TABLE_SIZE - 1);
int k = (int) f;
if (k < 0 /* gcc may cast an overflow float value to negative int value */
|| k > SHINE_TABLE_SIZE - 2)
return powf(dp, tab->shininess);
else
return tab->tab[k] + (f - k) * (tab->tab[k+1] - tab->tab[k]);
}
extern GLuint _mesa_material_bitmask( struct gl_context *ctx,
GLenum face, GLenum pname,
GLuint legal,
const char * );
extern void _mesa_validate_all_lighting_tables( struct gl_context *ctx );
extern void _mesa_update_lighting( struct gl_context *ctx );
extern void _mesa_update_tnl_spaces( struct gl_context *ctx, GLuint new_state );
extern void _mesa_update_material( struct gl_context *ctx,
GLuint bitmask );
extern void _mesa_update_color_material( struct gl_context *ctx,
const GLfloat rgba[4] );
extern void _mesa_init_lighting( struct gl_context *ctx );
extern void _mesa_free_lighting_data( struct gl_context *ctx );
extern void _mesa_allow_light_in_model( struct gl_context *ctx, GLboolean flag );
#else
#define _mesa_update_color_material( c, r ) ((void)0)
#define _mesa_validate_all_lighting_tables( c ) ((void)0)
#define _mesa_material_bitmask( c, f, p, l, s ) 0
#define _mesa_init_lighting( c ) ((void)0)
#define _mesa_free_lighting_data( c ) ((void)0)
#define _mesa_update_lighting( c ) ((void)0)
#define _mesa_update_tnl_spaces( c, n ) ((void)0)
#define GET_SHINE_TAB_ENTRY( table, dp, result ) ((result)=0)
#endif
#endif
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