enable GL_EXT_fog_coord. Calculate fog factors and submit them instead of fog coords (it seems the chip cannot do fog factor computation when not using fragment depth as fog coord source). vtxfmt uses fallback for now (most code present but some magic would be needed if replaying vertices is necessary later on).

1 files changed, 32 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/r200/r200_vtxfmt_c.c b/src/mesa/drivers/dri/r200/r200_vtxfmt_c.c
index 70301afb04e..670a2fb05a5 100644
--- a/src/mesa/drivers/dri/r200/r200_vtxfmt_c.c
+++ b/src/mesa/drivers/dri/r200/r200_vtxfmt_c.c
@@ -42,6 +42,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include "vtxfmt.h"
 
 #include "r200_vtxfmt.h"
+#include "r200_tcl.h"
 
 /* Fallback versions of all the entrypoints for situations where
  * codegen isn't available.  This is still a lot faster than the
@@ -512,6 +513,27 @@ static void r200_Normal3fv( const GLfloat *v )
 }
 
 
+/* FogCoord
+ */
+static void r200_FogCoordfEXT( GLfloat f )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   r200ContextPtr rmesa = R200_CONTEXT(ctx);
+   GLfloat *dest = rmesa->vb.fogptr;
+   dest[0] = r200ComputeFogBlendFactor( ctx, f );
+/*   ctx->Current.Attrib[VERT_ATTRIB_FOG][0] = f;*/
+}
+
+static void r200_FogCoordfvEXT( const GLfloat *v )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   r200ContextPtr rmesa = R200_CONTEXT(ctx);
+   GLfloat *dest = rmesa->vb.fogptr;
+   dest[0] = r200ComputeFogBlendFactor( ctx, v[0] );
+/*   ctx->Current.Attrib[VERT_ATTRIB_FOG][0] = v[0];*/
+}
+
+
 /* TexCoord
  */
 
@@ -778,7 +800,8 @@ static void choose_##FN ARGS1						\
  */
 #define MASK_XYZW  (R200_VTX_W0|R200_VTX_Z0)
 #define MASK_NORM  (MASK_XYZW|R200_VTX_N0)
-#define MASK_COLOR (MASK_NORM |(R200_VTX_COLOR_MASK<<R200_VTX_COLOR_0_SHIFT))
+#define MASK_FOG   (MASK_NORM |R200_VTX_DISCRETE_FOG)
+#define MASK_COLOR (MASK_FOG |(R200_VTX_COLOR_MASK<<R200_VTX_COLOR_0_SHIFT))
 #define MASK_SPEC  (MASK_COLOR|(R200_VTX_COLOR_MASK<<R200_VTX_COLOR_1_SHIFT))
 
 /* VTXFMT_1
@@ -871,6 +894,10 @@ CHOOSE(Vertex2f, p2f, ~0, ~0,
 CHOOSE(Vertex2fv, pfv, ~0, ~0, 
        (const GLfloat *v), (v))
 
+CHOOSE(FogCoordfEXT, p1f, MASK_FOG, ~0, 
+       (GLfloat f), (f))
+CHOOSE(FogCoordfvEXT, pfv, MASK_FOG, ~0, 
+       (const GLfloat *f), (f))
 
 
 
@@ -901,6 +928,8 @@ void r200VtxfmtInitChoosers( GLvertexformat *vfmt )
    vfmt->Vertex2fv = choose_Vertex2fv;
    vfmt->Vertex3f = choose_Vertex3f;
    vfmt->Vertex3fv = choose_Vertex3fv;
+/*   vfmt->FogCoordfEXT = choose_FogCoordfEXT;
+   vfmt->FogCoordfvEXT = choose_FogCoordfvEXT;*/
 
    /* TODO: restore ubyte colors to vtxfmt.
     */
@@ -943,6 +972,8 @@ void r200InitCodegen( struct dfn_generators *gen, GLboolean useCodegen )
    gen->MultiTexCoord2fvARB = codegen_noop;
    gen->MultiTexCoord1fARB = codegen_noop;
    gen->MultiTexCoord1fvARB = codegen_noop;
+/*   gen->FogCoordfEXT = codegen_noop;
+   gen->FogCoordfvEXT = codegen_noop;*/
 
    gen->Vertex2f = codegen_noop;
    gen->Vertex2fv = codegen_noop;