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authormarha <marha@users.sourceforge.net>2012-02-13 08:47:19 +0100
committermarha <marha@users.sourceforge.net>2012-02-13 08:47:19 +0100
commiteaa70945cb3f1a432b8c505ecede9ebc7769f36d (patch)
tree8e44ff4da739e384a2c6a34c1b42ecfb8e212344 /mesalib/src/mesa/main/light.c
parent474621addc25cb22865c54b70ffbec07c82eb04c (diff)
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libX11 libxcb mesa xserver mkfontscale git update 13 feb 2012
Diffstat (limited to 'mesalib/src/mesa/main/light.c')
-rw-r--r--mesalib/src/mesa/main/light.c65
1 files changed, 10 insertions, 55 deletions
diff --git a/mesalib/src/mesa/main/light.c b/mesalib/src/mesa/main/light.c
index bf4bee3d6..a16d0e998 100644
--- a/mesalib/src/mesa/main/light.c
+++ b/mesalib/src/mesa/main/light.c
@@ -154,7 +154,6 @@ _mesa_light(struct gl_context *ctx, GLuint lnum, GLenum pname, const GLfloat *pa
return;
FLUSH_VERTICES(ctx, _NEW_LIGHT);
light->SpotExponent = params[0];
- _mesa_invalidate_spot_exp_table(light);
break;
case GL_SPOT_CUTOFF:
ASSERT(params[0] == 180.0 || (params[0] >= 0.0 && params[0] <= 90.0));
@@ -624,6 +623,11 @@ _mesa_material_bitmask( struct gl_context *ctx, GLenum face, GLenum pname,
+static void
+invalidate_shine_table( struct gl_context *ctx, GLuint side );
+
+
+
/* Update derived values following a change in ctx->Light.Material
*/
void
@@ -697,11 +701,11 @@ _mesa_update_material( struct gl_context *ctx, GLuint bitmask )
}
if (bitmask & MAT_BIT_FRONT_SHININESS) {
- _mesa_invalidate_shine_table( ctx, 0 );
+ invalidate_shine_table( ctx, 0 );
}
if (bitmask & MAT_BIT_BACK_SHININESS) {
- _mesa_invalidate_shine_table( ctx, 1 );
+ invalidate_shine_table( ctx, 1 );
}
}
@@ -911,52 +915,12 @@ _mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params )
-/*
- * Whenever the spotlight exponent for a light changes we must call
- * this function to recompute the exponent lookup table.
- */
-void
-_mesa_invalidate_spot_exp_table( struct gl_light *l )
-{
- l->_SpotExpTable[0][0] = -1;
-}
-
-
-static void
-validate_spot_exp_table( struct gl_light *l )
-{
- GLint i;
- GLdouble exponent = l->SpotExponent;
- GLdouble tmp = 0;
- GLint clamp = 0;
-
- l->_SpotExpTable[0][0] = 0.0;
-
- for (i = EXP_TABLE_SIZE - 1; i > 0 ;i--) {
- if (clamp == 0) {
- tmp = pow(i / (GLdouble) (EXP_TABLE_SIZE - 1), exponent);
- if (tmp < FLT_MIN * 100.0) {
- tmp = 0.0;
- clamp = 1;
- }
- }
- l->_SpotExpTable[i][0] = (GLfloat) tmp;
- }
- for (i = 0; i < EXP_TABLE_SIZE - 1; i++) {
- l->_SpotExpTable[i][1] = (l->_SpotExpTable[i+1][0] -
- l->_SpotExpTable[i][0]);
- }
- l->_SpotExpTable[EXP_TABLE_SIZE-1][1] = 0.0;
-}
-
-
-
/* Calculate a new shine table. Doing this here saves a branch in
* lighting, and the cost of doing it early may be partially offset
* by keeping a MRU cache of shine tables for various shine values.
*/
-void
-_mesa_invalidate_shine_table( struct gl_context *ctx, GLuint side )
+static void
+invalidate_shine_table( struct gl_context *ctx, GLuint side )
{
ASSERT(side < 2);
if (ctx->_ShineTable[side])
@@ -1020,7 +984,6 @@ validate_shine_table( struct gl_context *ctx, GLuint side, GLfloat shininess )
void
_mesa_validate_all_lighting_tables( struct gl_context *ctx )
{
- GLuint i;
GLfloat shininess;
shininess = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SHININESS][0];
@@ -1030,10 +993,6 @@ _mesa_validate_all_lighting_tables( struct gl_context *ctx )
shininess = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SHININESS][0];
if (!ctx->_ShineTable[1] || ctx->_ShineTable[1]->shininess != shininess)
validate_shine_table( ctx, 1, shininess );
-
- for (i = 0; i < ctx->Const.MaxLights; i++)
- if (ctx->Light.Light[i]._SpotExpTable[0][0] == -1)
- validate_spot_exp_table( &ctx->Light.Light[i] );
}
@@ -1180,11 +1139,8 @@ compute_light_positions( struct gl_context *ctx )
light->_NormSpotDirection);
if (PV_dot_dir > light->_CosCutoff) {
- double x = PV_dot_dir * (EXP_TABLE_SIZE-1);
- int k = (int) x;
light->_VP_inf_spot_attenuation =
- (GLfloat) (light->_SpotExpTable[k][0] +
- (x-k)*light->_SpotExpTable[k][1]);
+ powf(PV_dot_dir, light->SpotExponent);
}
else {
light->_VP_inf_spot_attenuation = 0;
@@ -1303,7 +1259,6 @@ init_light( struct gl_light *l, GLuint n )
ASSIGN_4V( l->EyePosition, 0.0, 0.0, 1.0, 0.0 );
ASSIGN_3V( l->SpotDirection, 0.0, 0.0, -1.0 );
l->SpotExponent = 0.0;
- _mesa_invalidate_spot_exp_table( l );
l->SpotCutoff = 180.0;
l->_CosCutoffNeg = -1.0f;
l->_CosCutoff = 0.0; /* KW: -ve values not admitted */