Am 2003.03.30 17:45:23 +0200 schrieb(en) Brian Paul:
Andreas Stenglein wrote:
So in VTXFMT Mode, RADEON_CP_VC_FRMT_FPALPHA isnt added to "ind",
and so some programs dont look as good as they do when
NO_VTXFMT=1 is set.
ctx->Color.AlphaEnabled refers to GL_ALPHA_TEST. It has nothing to
do whatsoever with materials and lighting.
I think the real bug is elsewhere.
strange... maybe RADEON_CP_VC_FRMT_FPALPHA isnt for
alpha-testing, but just for alpha-blending?
When you look in radeon_maos_arrays.c (which seems to
be not used at all right now) ..._FPALPHA is enabled
in this case:
-snip-
if (VB->ColorPtr[0]->Size == 4 &&
(VB->ColorPtr[0]->StrideB != 0 ||
((GLfloat *)VB->ColorPtr[0]->Ptr)[3] != 1.0)) {
vfmt |= RADEON_CP_VC_FRMT_FPCOLOR |
RADEON_CP_VC_FRMT_FPALPHA;
emitsize = 4;
}
else {
vfmt |= RADEON_CP_VC_FRMT_FPCOLOR;
emitsize = 3;
}
-snip-
it just doesnt query ctx->Color.AlphaEnabled as the vtxfmt-path does.
Or: when you look into radeon_vtxfmt_c.c,
the _FPALPHA-flag is queried to choose between
radeon_Color4f_3f or radeon_Color4f_4f funtions:
-snip-
#define CHOOSE_COLOR(FN, FNTYPE, NR, MASK, ACTIVE, ARGS1, ARGS2 ) \
static void choose_##FN ARGS1 \
{ \
GLcontext *ctx = vb.context; \
radeonContextPtr rmesa = RADEON_CONTEXT(vb.context); \
int key = rmesa->vb.vertex_format & (MASK|ACTIVE); \
struct dynfn *dfn; \
\
if (rmesa->vb.vertex_format & ACTIVE_PKCOLOR) { \
ctx->Exec->FN = radeon_##FN##_ub; \
} \
else if ((rmesa->vb.vertex_format & \
(ACTIVE_FPCOLOR|ACTIVE_FPALPHA)) == ACTIVE_FPCOLOR) { \
\
if (rmesa->vb.installed_color_3f_sz != NR) { \
rmesa->vb.installed_color_3f_sz = NR; \
if (NR == 3) ctx->Current.Attrib[VERT_ATTRIB_COLOR0][3] =
1.0; \
if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) { \
radeon_copy_to_current( ctx ); \
_mesa_install_exec_vtxfmt( ctx, &rmesa->vb.vtxfmt ); \
ctx->Exec->FN ARGS2; \
return; \
} \
} \
\
ctx->Exec->FN = radeon_##FN##_3f; \
} \
else { \
ctx->Exec->FN = radeon_##FN##_4f; \
}
-snip-
#define ACTIVE_FPALPHA RADEON_CP_VC_FRMT_FPALPHA
-snip-
CHOOSE_COLOR(Color4f, p4f, 4, MASK_COLOR, ACTIVE_COLOR,
(GLfloat a,GLfloat b, GLfloat c, GLfloat d), (a,b,c,d))
-snip-
is there a description what this flag really does?
best
regards,
Andreas
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