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r600g: fix rendering with a vertex attrib having a zero stride

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The hardware supports zero stride just fine.  This is a port
of 2af8a19831 from r300g.

NOTE: This is a candidate for both the 7.9 and 7.10 branches.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
This commit is contained in:
Alex Deucher 2010-12-12 22:44:53 -05:00
parent d19b5cbd31
commit 4523285e51
1 changed files with 6 additions and 4 deletions
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10
src/gallium/drivers/r600/r600_state_common.c
View file

@ -187,11 +187,13 @@ void r600_set_vertex_buffers(struct pipe_context *ctx, unsigned count,
rctx->any_user_vbs = TRUE;
pipe_resource_reference(&rctx->vertex_buffer[i].buffer, buffers[i].buffer);
/* The stride of zero means we will be fetching only the first
* vertex, so don't care about max_index. */
if (!vbo->stride)
continue;
if (vbo->max_index == ~0) {
if (!vbo->stride)
vbo->max_index = 1;
else
vbo->max_index = (vbo->buffer->width0 - vbo->buffer_offset) / vbo->stride;
vbo->max_index = (vbo->buffer->width0 - vbo->buffer_offset) / vbo->stride;
}
max_index = MIN2(vbo->max_index, max_index);
}