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, 23 insertions, 12 deletions

diff --git a/src/mesa/main/fog.c b/src/mesa/main/fog.c
index d3b8a923aa..df99c6519f 100644
--- a/src/mesa/main/fog.c
+++ b/src/mesa/main/fog.c
@@ -70,7 +70,15 @@ _mesa_Fogiv(GLenum pname, const GLint *params )
          ;
    }
    _mesa_Fogfv(pname, p);
-}
+}

+

+

+#define UPDATE_FOG_SCALE(ctx) do {\

+      if (ctx->Fog.End == ctx->Fog.Start)\

+         ctx->Fog._Scale = 1.0f;\

+      else\

+         ctx->Fog._Scale = 1.0f / (ctx->Fog.End - ctx->Fog.Start);\

+   } while(0)
 
 
 void GLAPIENTRY
@@ -108,17 +116,19 @@ _mesa_Fogfv( GLenum pname, const GLfloat *params )
 	 ctx->Fog.Density = *params;
 	 break;
       case GL_FOG_START:
-	 if (ctx->Fog.Start == *params)
-	    return;
-	 FLUSH_VERTICES(ctx, _NEW_FOG);
-	 ctx->Fog.Start = *params;
-	 break;
+         if (ctx->Fog.Start == *params)
+            return;
+         FLUSH_VERTICES(ctx, _NEW_FOG);
+         ctx->Fog.Start = *params;

+         UPDATE_FOG_SCALE(ctx);
+         break;
       case GL_FOG_END:
-	 if (ctx->Fog.End == *params)
-	    return;
-	 FLUSH_VERTICES(ctx, _NEW_FOG);
-	 ctx->Fog.End = *params;
-	 break;
+         if (ctx->Fog.End == *params)
+            return;
+         FLUSH_VERTICES(ctx, _NEW_FOG);

+         ctx->Fog.End = *params;

+         UPDATE_FOG_SCALE(ctx);
+         break;
       case GL_FOG_INDEX:
  	 if (ctx->Fog.Index == *params)
 	    return;
@@ -173,5 +183,6 @@ void _mesa_init_fog( GLcontext * ctx )
    ctx->Fog.Start = 0.0;
    ctx->Fog.End = 1.0;
    ctx->Fog.ColorSumEnabled = GL_FALSE;
-   ctx->Fog.FogCoordinateSource = GL_FRAGMENT_DEPTH_EXT;
+   ctx->Fog.FogCoordinateSource = GL_FRAGMENT_DEPTH_EXT;

+   ctx->Fog._Scale = 1.0f;
 }