add GL_EXT_fog_coord support to radeon driver. No vtxfmt code (just uses fallback) yet. May cause a tcl fallback if fog coord is used together with separate specular lighting. Fog factors are precomputed and then submitted instead of the raw coords (chip limitation, same as on r200).

1 files changed, 7 insertions, 8 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_maos_vbtmp.h b/src/mesa/drivers/dri/radeon/radeon_maos_vbtmp.h
index 265d061b369..034cda8a65b 100644
--- a/src/mesa/drivers/dri/radeon/radeon_maos_vbtmp.h
+++ b/src/mesa/drivers/dri/radeon/radeon_maos_vbtmp.h
@@ -50,7 +50,6 @@ static void TAG(emit)( GLcontext *ctx,
    GLuint rqcoordsnoswap = 0;
    GLuint (*coord)[4];
    GLuint coord_stride; /* object coordinates */
-   GLubyte dummy[4];
    int i;
 
    union emit_union *v = (union emit_union *)dest;
@@ -133,7 +132,7 @@ static void TAG(emit)( GLcontext *ctx,
       }
    }
 
-   if (DO_SPEC) {
+   if (DO_SPEC_OR_FOG) {
       if (VB->SecondaryColorPtr[0]) {
 	 spec = VB->SecondaryColorPtr[0]->data;
 	 spec_stride = VB->SecondaryColorPtr[0]->stride;
@@ -143,12 +142,12 @@ static void TAG(emit)( GLcontext *ctx,
       }
    }
 
-   if (DO_FOG) {
+   if (DO_SPEC_OR_FOG) {
       if (VB->FogCoordPtr) {
 	 fog = VB->FogCoordPtr->data;
 	 fog_stride = VB->FogCoordPtr->stride;
       } else {
-	 fog = (GLfloat (*)[4])&dummy; fog[0][0] = 0.0F;
+	 fog = (GLfloat (*)[4])ctx->Current.Attrib[VERT_ATTRIB_FOG];
 	 fog_stride = 0;
       }
    }
@@ -202,7 +201,7 @@ static void TAG(emit)( GLcontext *ctx,
 	    STRIDE_4F(col, col_stride);
 	    v++;
 	 }
-	 if (DO_SPEC || DO_FOG) {
+	 if (DO_SPEC_OR_FOG) {
 	    if (DO_SPEC) {
 	       UNCLAMPED_FLOAT_TO_UBYTE(v[0].rgba.red, spec[0][0]);
 	       UNCLAMPED_FLOAT_TO_UBYTE(v[0].rgba.green, spec[0][1]);
@@ -210,8 +209,8 @@ static void TAG(emit)( GLcontext *ctx,
 	       STRIDE_4F(spec, spec_stride);
 	    }
 	    if (DO_FOG) {
-	       UNCLAMPED_FLOAT_TO_UBYTE(v[0].rgba.alpha, fog[0][0]);
-	       fog = (GLfloat (*)[4])((GLubyte *)fog + fog_stride);
+	       UNCLAMPED_FLOAT_TO_UBYTE(v[0].rgba.alpha, radeonComputeFogBlendFactor(ctx, fog[0][0]));
+	       STRIDE_4F(fog, fog_stride);
 	    }
 	    if (TCL_DEBUG) fprintf(stderr, "%x ", v[0].ui);
 	    v++;
@@ -283,7 +282,7 @@ static void TAG(init)( void )
    if (DO_W) sz++;
    if (DO_NORM) sz += 3;
    if (DO_RGBA) sz++;
-   if (DO_SPEC || DO_FOG) sz++;
+   if (DO_SPEC_OR_FOG) sz++;
    if (DO_TEX0) sz += 2;
    if (DO_TEX0 && DO_PTEX) sz++;
    if (DO_TEX1) sz += 2;