diff options
Diffstat (limited to 'src/mesa/vbo/vbo_exec_draw.c')
| -rw-r--r-- | src/mesa/vbo/vbo_exec_draw.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/mesa/vbo/vbo_exec_draw.c b/src/mesa/vbo/vbo_exec_draw.c index 5b2e3550ca8..7204aec1dcb 100644 --- a/src/mesa/vbo/vbo_exec_draw.c +++ b/src/mesa/vbo/vbo_exec_draw.c @@ -175,7 +175,20 @@ static void vbo_exec_bind_arrays( GLcontext *ctx ) exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr]; } map = vbo->map_vp_arb; + + /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read. + * In that case we effectively need to route the data from + * glVertexAttrib(0, val) calls to feed into the GENERIC0 input. + */ + if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 && + (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) { + exec->vtx.inputs[16] = exec->vtx.inputs[0]; + exec->vtx.attrsz[16] = exec->vtx.attrsz[0]; + exec->vtx.attrsz[0] = 0; + } break; + default: + assert(0); } /* Make all active attributes (including edgeflag) available as |