diff options
Diffstat (limited to 'mesalib/src/mesa/main/light.h')
| -rw-r--r-- | mesalib/src/mesa/main/light.h | 37 |
1 files changed, 17 insertions, 20 deletions
diff --git a/mesalib/src/mesa/main/light.h b/mesalib/src/mesa/main/light.h index 9b66c7ed8..996698793 100644 --- a/mesalib/src/mesa/main/light.h +++ b/mesalib/src/mesa/main/light.h @@ -87,22 +87,24 @@ extern void _mesa_light(struct gl_context *ctx, GLuint lnum, GLenum pname, const GLfloat *params); -/* Lerp between adjacent values in the f(x) lookup table, giving a - * continuous function, with adequeate overall accuracy. (Though - * still pretty good compared to a straight lookup). - * Result should be a GLfloat. +/* + * 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). */ -#define GET_SHINE_TAB_ENTRY( table, dp, result ) \ -do { \ - struct gl_shine_tab *_tab = table; \ - 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) \ - result = (GLfloat) pow( dp, _tab->shininess ); \ - else \ - result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]); \ -} while (0) +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, @@ -110,10 +112,6 @@ extern GLuint _mesa_material_bitmask( struct gl_context *ctx, GLuint legal, const char * ); -extern void _mesa_invalidate_spot_exp_table( struct gl_light *l ); - -extern void _mesa_invalidate_shine_table( struct gl_context *ctx, GLuint i ); - extern void _mesa_validate_all_lighting_tables( struct gl_context *ctx ); extern void _mesa_update_lighting( struct gl_context *ctx ); @@ -135,7 +133,6 @@ 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_invalidate_spot_exp_table( l ) ((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) |