devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

reduce pictureflow's fade_color by one multiply, and a few shifts, while still maintaining reasonable quality

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19770 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2009-01-14 08:15:35 +00:00
parent d7d75b7fd4
commit 6e54d94908
1 changed files with 10 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

18
apps/plugins/pictureflow.c
View file

@ -1067,20 +1067,22 @@ void recalc_table(void)
#if (LCD_PIXELFORMAT == RGB565SWAPPED)
static inline pix_t fade_color(pix_t c, unsigned int a)
{
unsigned int result;
c = swap16(c);
unsigned int result=0;
result |= (((c & 0x1f) * a) >> 8) & 0x1f;
result |= (((c & 0x7e0) * a) >> 8) & 0x7e0;
result |= (((c & 0xf800) * a) >> 8) & 0xf800;
a = (a + 2) & 0x1fc;
result = ((c & 0xf81f) * a) & 0xf81f00;
result |= ((c & 0x7e0) * a) & 0x7e000;
result >>= 8;
return swap16(result);
}
#elif LCD_PIXELFORMAT == RGB565
static inline pix_t fade_color(pix_t c, unsigned int a)
{
unsigned int result=0;
result |= (((c & 0x1f) * a) >> 8) & 0x1f;
result |= (((c & 0x7e0) * a) >> 8) & 0x7e0;
result |= (((c & 0xf800) * a) >> 8) & 0xf800;
unsigned int result;
a = (a + 2) & 0x1fc;
result = ((c & 0xf81f) * a) & 0xf81f00;
result |= ((c & 0x7e0) * a) & 0x7e000;
result >>= 8;
return result;
}
#else