GLSL fixes:

- generate error on NULL pointers in glShaderSourceARB;
- reinstall program object, if current, in glLinkProgramARB;
- vertex and fragment shaders are optional in program object;
- floor asm was wrongly computed for x86 back-end;
- allow for (void) idiom in function prototypes;
- all fixed-state uniforms are updated;
- local variable initializers are working;
- implement texture* and shadow* functions for vertex processor;
- generate error if too many arguments in general constructor;
- trim unused data in general constructor;
- struct r-value field select was badly relocated;

Changes:
- add derived state gl_fog_attrib::_Scale;
- add derived state gl_light::_CosCutoffNeg;

1 files changed, 11 insertions, 8 deletions

diff --git a/src/mesa/main/light.c b/src/mesa/main/light.c
index 8fa62eb873..35ec1547e9 100644
--- a/src/mesa/main/light.c
+++ b/src/mesa/main/light.c
@@ -123,16 +123,18 @@ _mesa_light(GLcontext *ctx, GLuint lnum, GLenum pname, const GLfloat *params)
    case GL_SPOT_CUTOFF:
       ASSERT(params[0] == 180.0 || (params[0] >= 0.0 && params[0] <= 90.0));
       if (light->SpotCutoff == params[0])
-	 return;
+         return;
       FLUSH_VERTICES(ctx, _NEW_LIGHT);
-      light->SpotCutoff = params[0];
-      light->_CosCutoff = (GLfloat) _mesa_cos(params[0]*DEG2RAD);
-      if (light->_CosCutoff < 0)
-	 light->_CosCutoff = 0;
+      light->SpotCutoff = params[0];

+      light->_CosCutoffNeg = (GLfloat) (_mesa_cos(light->SpotCutoff * DEG2RAD));
+      if (light->_CosCutoffNeg < 0)
+         light->_CosCutoff = 0;

+      else

+         light->_CosCutoff = light->_CosCutoffNeg;
       if (light->SpotCutoff != 180.0F)
-	 light->_Flags |= LIGHT_SPOT;
+         light->_Flags |= LIGHT_SPOT;
       else
-	 light->_Flags &= ~LIGHT_SPOT;
+         light->_Flags &= ~LIGHT_SPOT;
       break;
    case GL_CONSTANT_ATTENUATION:
       ASSERT(params[0] >= 0.0);
@@ -1263,7 +1265,8 @@ init_light( struct gl_light *l, GLuint n )
    ASSIGN_3V( l->EyeDirection, 0.0, 0.0, -1.0 );
    l->SpotExponent = 0.0;
    _mesa_invalidate_spot_exp_table( l );
-   l->SpotCutoff = 180.0;
+   l->SpotCutoff = 180.0;

+   l->_CosCutoffNeg = -1.0f;
    l->_CosCutoff = 0.0;		/* KW: -ve values not admitted */
    l->ConstantAttenuation = 1.0;
    l->LinearAttenuation = 0.0;