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author | Marek Olšák <maraeo@gmail.com> | 2010-12-19 02:54:43 +0100 |
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committer | Marek Olšák <maraeo@gmail.com> | 2010-12-19 04:05:34 +0100 |
commit | 237880463d5168cad8df0bae6018b5fd76617777 (patch) | |
tree | 074ba5ca428f075606c0dce67ac0abde3a3182ff /src/gallium/drivers/r300/r300_render.c | |
parent | c87f82bc40f90fd3fe7af74ffa4d7784c7d1b6b1 (diff) | |
download | external_mesa3d-237880463d5168cad8df0bae6018b5fd76617777.zip external_mesa3d-237880463d5168cad8df0bae6018b5fd76617777.tar.gz external_mesa3d-237880463d5168cad8df0bae6018b5fd76617777.tar.bz2 |
r300g: optimize the fallback for misaligned ushort indices
Diffstat (limited to 'src/gallium/drivers/r300/r300_render.c')
-rw-r--r-- | src/gallium/drivers/r300/r300_render.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c index b4197e0..1d26eb9 100644 --- a/src/gallium/drivers/r300/r300_render.c +++ b/src/gallium/drivers/r300/r300_render.c @@ -551,7 +551,27 @@ static void r300_draw_range_elements(struct pipe_context* pipe, &start, count); r300_update_derived_state(r300); - r300_upload_index_buffer(r300, &indexBuffer, indexSize, start, count, &new_offset); + + /* Fallback for misaligned ushort indices. */ + if (indexSize == 2 && start % 2 == 1) { + struct pipe_transfer *transfer; + struct pipe_resource *userbuf; + uint16_t *ptr = pipe_buffer_map(pipe, indexBuffer, + PIPE_TRANSFER_READ, &transfer); + + /* Copy the mapped index buffer directly to the upload buffer. + * The start index will be aligned simply from the fact that + * every sub-buffer in u_upload_mgr is aligned. */ + userbuf = pipe->screen->user_buffer_create(pipe->screen, + ptr + start, count * 2, + PIPE_BIND_INDEX_BUFFER); + indexBuffer = userbuf; + r300_upload_index_buffer(r300, &indexBuffer, indexSize, 0, count, &new_offset); + pipe_resource_reference(&userbuf, NULL); + pipe_buffer_unmap(pipe, indexBuffer, transfer); + } else { + r300_upload_index_buffer(r300, &indexBuffer, indexSize, start, count, &new_offset); + } start = new_offset; |