diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/auxiliary/util/u_helpers.c | 30 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_helpers.h | 5 |
2 files changed, 35 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_helpers.c b/src/gallium/auxiliary/util/u_helpers.c index 09020b061a3..35cca82c8e0 100644 --- a/src/gallium/auxiliary/util/u_helpers.c +++ b/src/gallium/auxiliary/util/u_helpers.c @@ -27,6 +27,7 @@ #include "util/u_helpers.h" #include "util/u_inlines.h" +#include "util/u_upload_mgr.h" /** * This function is used to copy an array of pipe_vertex_buffer structures, @@ -109,3 +110,32 @@ util_set_index_buffer(struct pipe_index_buffer *dst, memset(dst, 0, sizeof(*dst)); } } + +/** + * Given a user index buffer, save the structure to "saved", and upload it. + */ +bool +util_save_and_upload_index_buffer(struct pipe_context *pipe, + const struct pipe_draw_info *info, + const struct pipe_index_buffer *ib, + struct pipe_index_buffer *out_saved) +{ + struct pipe_index_buffer new_ib = {0}; + unsigned start_offset = info->start * ib->index_size; + + u_upload_data(pipe->stream_uploader, start_offset, + info->count * ib->index_size, 4, + (char*)ib->user_buffer + start_offset, + &new_ib.offset, &new_ib.buffer); + if (!new_ib.buffer) + return false; + u_upload_unmap(pipe->stream_uploader); + + new_ib.offset -= start_offset; + new_ib.index_size = ib->index_size; + + util_set_index_buffer(out_saved, ib); + pipe->set_index_buffer(pipe, &new_ib); + pipe_resource_reference(&new_ib.buffer, NULL); + return true; +} diff --git a/src/gallium/auxiliary/util/u_helpers.h b/src/gallium/auxiliary/util/u_helpers.h index a9a53e4347a..7de960b907d 100644 --- a/src/gallium/auxiliary/util/u_helpers.h +++ b/src/gallium/auxiliary/util/u_helpers.h @@ -47,6 +47,11 @@ void util_set_vertex_buffers_count(struct pipe_vertex_buffer *dst, void util_set_index_buffer(struct pipe_index_buffer *dst, const struct pipe_index_buffer *src); +bool util_save_and_upload_index_buffer(struct pipe_context *pipe, + const struct pipe_draw_info *info, + const struct pipe_index_buffer *ib, + struct pipe_index_buffer *out_saved); + #ifdef __cplusplus } #endif |