On 08/02/2014 02:11 PM, Jason Ekstrand wrote:
Most format conversion operations required by GL can be performed by converting one channel at a time, shuffling the channels around, and optionally filling missing channels with zeros and ones. This adds a function to do just that in a general, yet efficient, way.v2: * Add better comments including full docs for functions * Don't use __typeof__ * Use inline helpers instead of writing out conversions by hand, * Force full loop unrolling for better performance Signed-off-by: Jason Ekstrand <jason.ekstr...@intel.com> --- src/mesa/main/format_utils.c | 844 +++++++++++++++++++++++++++++++++++++++++++ src/mesa/main/format_utils.h | 5 + 2 files changed, 849 insertions(+) diff --git a/src/mesa/main/format_utils.c b/src/mesa/main/format_utils.c index 241c158..d60aeb3 100644 --- a/src/mesa/main/format_utils.c +++ b/src/mesa/main/format_utils.c @@ -54,3 +54,847 @@ _mesa_srgb_ubyte_to_linear_float(uint8_t cl) return lut[cl]; } + +/* A bunch of format conversion macros and helper functions used below */ + +/* Only guaranteed to work for BITS <= 32 */ +#define MAX_UINT(BITS) ((BITS) == 32 ? UINT32_MAX : ((1u << (BITS)) - 1)) +#define MAX_INT(BITS) (int)MAX_UINT((BITS) - 1)
I'd probably put one more set of parens around the whole macro body, just to be safe.
-Brian _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
