diff options
Diffstat (limited to 'src/gallium/auxiliary/util/u_staging.h')
-rw-r--r-- | src/gallium/auxiliary/util/u_staging.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_staging.h b/src/gallium/auxiliary/util/u_staging.h new file mode 100644 index 0000000000..602faa2971 --- /dev/null +++ b/src/gallium/auxiliary/util/u_staging.h @@ -0,0 +1,37 @@ +/* Direct3D 10/11 has no concept of transfers. Applications instead + * create resources with a STAGING or DYNAMIC usage, copy between them + * and the real resource and use Map to map the STAGING/DYNAMIC resource. + * + * This util module allows to implement Gallium drivers as a Direct3D + * driver would be implemented: transfers allocate a resource with + * PIPE_USAGE_STAGING, and copy the data between it and the real resource + * with resource_copy_region. + */ + +#ifndef U_STAGING_H +#define U_STAGING_H + +#include "pipe/p_state.h" + +struct util_staging_transfer { + struct pipe_transfer base; + + /* if direct, same as base.resource, otherwise the temporary staging resource */ + struct pipe_resource *staging_resource; +}; + +/* user must be stride, slice_stride and offset */ +/* pt->usage == PIPE_USAGE_DYNAMIC should be a good value to pass for direct */ +/* staging resource is currently created with PIPE_USAGE_DYNAMIC */ +struct util_staging_transfer * +util_staging_transfer_new(struct pipe_context *pipe, + struct pipe_resource *pt, + struct pipe_subresource sr, + unsigned usage, + const struct pipe_box *box, + bool direct); + +void +util_staging_transfer_destroy(struct pipe_context *pipe, struct pipe_transfer *ptx); + +#endif |