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| author | Marcoen Hirschberg <marcoen@gmail.com> | 2007-03-30 10:09:19 +0000 |
|---|---|---|
| committer | Marcoen Hirschberg <marcoen@gmail.com> | 2007-03-30 10:09:19 +0000 |
| commit | 4c59c1a4416389e68620eb37d11c30959ac82940 (patch) | |
| tree | 6feb79b2612f1875a7ba1b35519eb6b0c0a8e216 | |
| parent | f46857f0851a85246096a1e02c92e374b7516375 (diff) | |
| download | rockbox-4c59c1a4416389e68620eb37d11c30959ac82940.tar.gz rockbox-4c59c1a4416389e68620eb37d11c30959ac82940.zip | |
Correct the YCbCr to RGB conversion
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12969 a1c6a512-1295-4272-9138-f99709370657
| -rw-r--r-- | firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c index b9c09e9f7f..2d2f32069a 100644 --- a/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c +++ b/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c @@ -296,13 +296,16 @@ void lcd_bitmap_transparent_part(const fb_data *src, int src_x, int src_y, #define CSUB_X 2 #define CSUB_Y 2 -#define RYFAC (31*257) -#define GYFAC (63*257) -#define BYFAC (31*257) -#define RVFAC 11170 /* 31 * 257 * 1.402 */ -#define GVFAC (-11563) /* 63 * 257 * -0.714136 */ -#define GUFAC (-5572) /* 63 * 257 * -0.344136 */ -#define BUFAC 14118 /* 31 * 257 * 1.772 */ +#define RFULL (31*257) +#define GFULL (63*257) +#define BFULL (31*257) +#define RYFAC 9277 /* 31 * 257 * 1.0 * (255/219) */ +#define GYFAC 18853 /* 63 * 257 * 1.0 * (255/219) */ +#define BYFAC 9277 /* 31 * 257 * 1.0 * (255/219) */ +#define RVFAC 12716 /* 31 * 257 * 1.402 * (255/224) */ +#define GVFAC (-13163) /* 63 * 257 * -0.714136 * (255/224) */ +#define GUFAC (-6343) /* 63 * 257 * -0.344136 * (255/224) */ +#define BUFAC 16071 /* 31 * 257 * 1.772 * (255/224) */ #define ROUNDOFFS (127*257) @@ -342,31 +345,31 @@ void lcd_yuv_blit(unsigned char * const src[3], do { - y = *ysrc++; + y = *ysrc++ - 16; red = RYFAC * y + rc; green = GYFAC * y + gc; blue = BYFAC * y + bc; - if ((unsigned)red > (RYFAC*255+ROUNDOFFS)) + if ((unsigned)red > (RFULL*255+ROUNDOFFS)) { if (red < 0) red = 0; else - red = (RYFAC*255+ROUNDOFFS); + red = (RFULL*255+ROUNDOFFS); } - if ((unsigned)green > (GYFAC*255+ROUNDOFFS)) + if ((unsigned)green > (GFULL*255+ROUNDOFFS)) { if (green < 0) green = 0; else - green = (GYFAC*255+ROUNDOFFS); + green = (GFULL*255+ROUNDOFFS); } - if ((unsigned)blue > (BYFAC*255+ROUNDOFFS)) + if ((unsigned)blue > (BFULL*255+ROUNDOFFS)) { if (blue < 0) blue = 0; else - blue = (BYFAC*255+ROUNDOFFS); + blue = (BFULL*255+ROUNDOFFS); } rbits = ((unsigned)red) >> 16 ; gbits = ((unsigned)green) >> 16 ; |