From: Ilia Mirkin Date: Tue, 25 Mar 2014 21:10:54 +0000 (-0400) Subject: gallium: add interface to clear buffers X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=24b86cb3047507078ae8d0e2e8943586ee85ede5;p=mesa.git gallium: add interface to clear buffers Signed-off-by: Ilia Mirkin Reviewed-by: Marek Olšák --- diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst index 8e14522667a..efa2a1c77f0 100644 --- a/src/gallium/docs/source/context.rst +++ b/src/gallium/docs/source/context.rst @@ -218,6 +218,11 @@ is is also possible to only clear one or the other part). While it is only possible to clear one surface at a time (which can include several layers), this surface need not be bound to the framebuffer. +``clear_buffer`` clears a PIPE_BUFFER resource with the specified clear value +(which may be multiple bytes in length). Logically this is a memset with a +multi-byte element value starting at offset bytes from resource start, going +for size bytes. It is guaranteed that size % clear_value_size == 0. + Drawing ^^^^^^^ diff --git a/src/gallium/include/pipe/p_context.h b/src/gallium/include/pipe/p_context.h index fe3045acb9c..bf27285c0f3 100644 --- a/src/gallium/include/pipe/p_context.h +++ b/src/gallium/include/pipe/p_context.h @@ -332,6 +332,17 @@ struct pipe_context { unsigned dstx, unsigned dsty, unsigned width, unsigned height); + /** + * Clear a buffer. Runs a memset over the specified region with the element + * value passed in through clear_value of size clear_value_size. + */ + void (*clear_buffer)(struct pipe_context *pipe, + struct pipe_resource *res, + unsigned offset, + unsigned size, + const void *clear_value, + int clear_value_size); + /** Flush draw commands * * \param flags bitfield of enum pipe_flush_flags values.