diff options
Diffstat (limited to 'src/lib/libjpeg/jdmerge.c')
| -rw-r--r-- | src/lib/libjpeg/jdmerge.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/lib/libjpeg/jdmerge.c b/src/lib/libjpeg/jdmerge.c index 37444468c23..c421f45e972 100644 --- a/src/lib/libjpeg/jdmerge.c +++ b/src/lib/libjpeg/jdmerge.c @@ -14,19 +14,19 @@ * (ie, box filtering), we can save some work in color conversion by * calculating all the output pixels corresponding to a pair of chroma * samples at one time. In the conversion equations - * R = Y + K1 * Cr - * G = Y + K2 * Cb + K3 * Cr - * B = Y + K4 * Cb + * R = Y + K1 * Cr + * G = Y + K2 * Cb + K3 * Cr + * B = Y + K4 * Cb * only the Y term varies among the group of pixels corresponding to a pair * of chroma samples, so the rest of the terms can be calculated just once. * At typical sampling ratios, this eliminates half or three-quarters of the * multiplications needed for color conversion. * * This file currently provides implementations for the following cases: - * YCbCr => RGB color conversion only. - * Sampling ratios of 2h1v or 2h2v. - * No scaling needed at upsample time. - * Corner-aligned (non-CCIR601) sampling alignment. + * YCbCr => RGB color conversion only. + * Sampling ratios of 2h1v or 2h2v. + * No scaling needed at upsample time. + * Corner-aligned (non-CCIR601) sampling alignment. * Other special cases could be added, but in most applications these are * the only common cases. (For uncommon cases we fall back on the more * general code in jdsample.c and jdcolor.c.) |
