change some bogus comments regarding the base e exponential function used for fog...

diff --git a/src/mesa/drivers/dri/r200/r200_vertprog.c b/src/mesa/drivers/dri/r200/r200_vertprog.c
index e5417db..588e56e 100644 (file)
--- a/src/mesa/drivers/dri/r200/r200_vertprog.c
+++ b/src/mesa/drivers/dri/r200/r200_vertprog.c
@@ -543,8 +543,8 @@ static GLboolean r200_translate_vertex_program(struct r200_vertex_program *vp, G
       //_mesa_print_program(&mesa_vp->Base);
    }
 
-   /* for fogc, can't change mesa_vp, as it would hose swtnl
-      maybe should just copy whole prog ? */
+   /* for fogc, can't change mesa_vp, as it would hose swtnl, and exp with
+      base e isn't directly available neither. */
    if (mesa_vp->Base.OutputsWritten & VERT_RESULT_FOGC && !vp->fogpidx) {
       struct gl_program_parameter_list *paramList;
       GLint tokens[6] = { STATE_FOG_PARAMS, 0, 0, 0, 0, 0 };
@@ -1016,7 +1016,7 @@ else {
            o_inst->src1 = EASY_VSF_SOURCE(vp->fogpidx, X, X, X, X, PARAM, NONE);
            o_inst->src2 = UNUSED_SRC_1;
            o_inst++;
-           o_inst->op = MAKE_VSF_OP(R200_VPI_OUT_OP_EXP_FOG,
+           o_inst->op = MAKE_VSF_OP(R200_VPI_OUT_OP_EXP_E,
                R200_VSF_OUT_CLASS_RESULT_FOGC,
                VSF_FLAG_X);
            o_inst->src0 = EASY_VSF_SOURCE(fog_temp_i, X, X, X, X, TMP, ALL);
@@ -1038,7 +1038,7 @@ else {
            o_inst->src1 = EASY_VSF_SOURCE(fog_temp_i, X, X, X, X, TMP, NONE);
            o_inst->src2 = UNUSED_SRC_1;
            o_inst++;
-           o_inst->op = MAKE_VSF_OP(R200_VPI_OUT_OP_EXP_FOG,
+           o_inst->op = MAKE_VSF_OP(R200_VPI_OUT_OP_EXP_E,
                R200_VSF_OUT_CLASS_RESULT_FOGC,
                VSF_FLAG_X);
            o_inst->src0 = EASY_VSF_SOURCE(fog_temp_i, X, X, X, X, TMP, ALL);

diff --git a/src/mesa/drivers/dri/r200/r200_vertprog.h b/src/mesa/drivers/dri/r200/r200_vertprog.h
index 38168fb..9382376 100644 (file)
--- a/src/mesa/drivers/dri/r200/r200_vertprog.h
+++ b/src/mesa/drivers/dri/r200/r200_vertprog.h
@@ -89,9 +89,8 @@ extern void r200SetupVertexProg( GLcontext *ctx );
 
 #define R200_VPI_OUT_OP_EXP                     (65 << 0)
 #define R200_VPI_OUT_OP_LOG                     (66 << 0)
-/* this is used for fog. Not sure what's different to normal EX2,
-   but for fog calcs seems to match sw tnl much more closely. */
-#define R200_VPI_OUT_OP_EXP_FOG                 (67 << 0)
+/* base e exp. Useful for fog. */
+#define R200_VPI_OUT_OP_EXP_E                   (67 << 0)
 
 #define R200_VPI_OUT_OP_LIT                     (68 << 0)
 #define R200_VPI_OUT_OP_POW                     (69 << 0)