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draw: make sure we correctly iterate over output buffers on stream out 

we kept overwriting the first attribute of a vertex in a single-stream-
out-buffer case
This commit is contained in:
Zack Rusin 2010-06-16 15:56:17 -04:00
parent 509ff13d06
commit 638a80bc07
1 changed files with 11 additions and 5 deletions
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16
src/gallium/auxiliary/draw/draw_pt_so_emit.c
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@ -124,14 +124,15 @@ static void so_emit_prim(struct pt_so_emit *so,
for (i = 0; i < num_vertices; ++i) {
const float (*input)[4];
unsigned total_written_compos = 0;
/*debug_printf("%d) vertex index = %d (prim idx = %d)\n", i, indices[i], prim_idx);*/
input = (const float (*)[4])(
(const char *)input_ptr + (indices[i] * input_vertex_stride));
for (slot = 0; slot < state->num_outputs; ++slot) {
unsigned idx = state->register_index[slot];
unsigned writemask = state->register_mask[slot];
unsigned compo;
unsigned written_compos = 0;
unsigned compo;
buffer = (float**)&so->buffers[state->output_buffer[slot]];
@ -157,11 +158,16 @@ static void so_emit_prim(struct pt_so_emit *so,
input[idx][2],
input[idx][3]);
#endif
if (!so->single_buffer)
*buffer += written_compos;
*buffer += written_compos;
total_written_compos += written_compos;
}
if (so->single_buffer) {
unsigned stride = state->stride -
sizeof(float) * total_written_compos;
debug_assert(stride >= 0);
*buffer = (float*) (((char*)*buffer) + stride);
}
if (so->single_buffer)
*buffer = (float*) (((char*)*buffer) + state->stride);
}
so->emitted_vertices += num_vertices;
++so->emitted_primitives;