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authorJerome Glisse <glisse@freedesktop.org>2007-01-14 19:31:30 +0100
committerJerome Glisse <glisse@freedesktop.org>2007-01-14 19:32:22 +0100
commit9a4e49aef2abb277544138640c2b71169badaa42 (patch)
treee6772123621102cdee76b3168ead57b5a8e6fdb3 /src/mesa/drivers/dri
parent6dd967e74ff4cb03220d5785bd583203464d299d (diff)
r300: Fix vertex program position invariant bug, force position reading.
When we have a position invariant program we need to force routing the position otherwise you may handle transform quite random data which might be funny but unlikely what you want :).
Diffstat (limited to 'src/mesa/drivers/dri')
-rw-r--r--src/mesa/drivers/dri/r300/r300_vertexprog.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/r300/r300_vertexprog.c b/src/mesa/drivers/dri/r300/r300_vertexprog.c
index 2492a4a3a0..c08c98767e 100644
--- a/src/mesa/drivers/dri/r300/r300_vertexprog.c
+++ b/src/mesa/drivers/dri/r300/r300_vertexprog.c
@@ -1072,6 +1072,8 @@ static void insert_wpos(struct r300_vertex_program *vp,
vpi = &prog->Instructions[prog->NumInstructions-1];
assert(vpi->Opcode == OPCODE_END);
+ /* we need position, don't we ? :) */
+ prog->InputsRead |= (1 << VERT_ATTRIB_POS);
}
static void pos_as_texcoord(struct r300_vertex_program *vp,
@@ -1101,8 +1103,9 @@ static struct r300_vertex_program *build_program(struct r300_vertex_program_key
vp->wpos_idx = wpos_idx;
- if(mesa_vp->IsPositionInvariant)
+ if(mesa_vp->IsPositionInvariant) {
position_invariant(&mesa_vp->Base);
+ }
if(wpos_idx > -1)
pos_as_texcoord(vp, &mesa_vp->Base);
@@ -1158,6 +1161,10 @@ void r300_select_vertex_shader(r300ContextPtr r300)
wanted_key.OutputsWritten |= 1 << (VERT_RESULT_TEX0 + i);
wanted_key.InputsRead = vpc->mesa_program.Base.InputsRead;
+ if(vpc->mesa_program.IsPositionInvariant) {
+ /* we wan't position don't we ? */
+ wanted_key.InputsRead |= (1 << VERT_ATTRIB_POS);
+ }
for (vp = vpc->progs; vp; vp = vp->next)
if (_mesa_memcmp(&vp->key, &wanted_key, sizeof(wanted_key)) == 0) {
@@ -1170,6 +1177,5 @@ void r300_select_vertex_shader(r300ContextPtr r300)
vp = build_program(&wanted_key, &vpc->mesa_program, wpos_idx);
vp->next = vpc->progs;
vpc->progs = vp;
-
r300->selected_vp = vp;
}