diff options
| -rw-r--r-- | src/gallium/include/pipe/p_defines.h | 59 |
1 files changed, 57 insertions, 2 deletions
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h index 6a61aea8fd7..fd14dc8e92d 100644 --- a/src/gallium/include/pipe/p_defines.h +++ b/src/gallium/include/pipe/p_defines.h @@ -225,9 +225,10 @@ enum pipe_transfer_usage { }; -/** +/* * Buffer usage flags */ + #define PIPE_BUFFER_USAGE_CPU_READ (1 << 0) #define PIPE_BUFFER_USAGE_CPU_WRITE (1 << 1) #define PIPE_BUFFER_USAGE_GPU_READ (1 << 2) @@ -236,9 +237,63 @@ enum pipe_transfer_usage { #define PIPE_BUFFER_USAGE_VERTEX (1 << 5) #define PIPE_BUFFER_USAGE_INDEX (1 << 6) #define PIPE_BUFFER_USAGE_CONSTANT (1 << 7) + +/* + * CPU access flags. + * + * These flags should only be used for texture transfers or when mapping + * buffers. + * + * Note that the PIPE_BUFFER_USAGE_CPU_xxx flags above are also used for + * mapping. Either PIPE_BUFFER_USAGE_CPU_READ or PIPE_BUFFER_USAGE_CPU_WRITE + * must be set. + */ + +/** + * Discards the memory within the mapped region. + * + * It should not be used with PIPE_BUFFER_USAGE_CPU_READ. + * + * See also: + * - OpenGL's ARB_map_buffer_range extension, MAP_INVALIDATE_RANGE_BIT flag. + * - Direct3D's D3DLOCK_DISCARD flag. + */ #define PIPE_BUFFER_USAGE_DISCARD (1 << 8) + +/** + * Fail if the resource cannot be mapped immediately. + * + * See also: + * - Direct3D's D3DLOCK_DONOTWAIT flag. + * - Mesa3D's MESA_MAP_NOWAIT_BIT flag. + * - WDDM's D3DDDICB_LOCKFLAGS.DonotWait flag. + */ #define PIPE_BUFFER_USAGE_DONTBLOCK (1 << 9) -#define PIPE_BUFFER_USAGE_FLUSH_EXPLICIT (1 << 10) /**< See pipe_screen::buffer_flush_mapped_range */ + +/** + * Do not attempt to synchronize pending operations on the resource when mapping. + * + * It should not be used with PIPE_BUFFER_USAGE_CPU_READ. + * + * See also: + * - OpenGL's ARB_map_buffer_range extension, MAP_UNSYNCHRONIZED_BIT flag. + * - Direct3D's D3DLOCK_NOOVERWRITE flag. + * - WDDM's D3DDDICB_LOCKFLAGS.IgnoreSync flag. + */ +#define PIPE_BUFFER_USAGE_UNSYNCHRONIZED (1 << 10) + +/** + * Written ranges will be notified later with + * pipe_screen::buffer_flush_mapped_range. + * + * It should not be used with PIPE_BUFFER_USAGE_CPU_READ. + * + * See also: + * - pipe_screen::buffer_flush_mapped_range + * - OpenGL's ARB_map_buffer_range extension, MAP_FLUSH_EXPLICIT_BIT flag. + */ +#define PIPE_BUFFER_USAGE_FLUSH_EXPLICIT (1 << 11) + /** Pipe driver custom usage flags should be greater or equal to this value */ #define PIPE_BUFFER_USAGE_CUSTOM (1 << 16) |