mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-30 13:38:40 +00:00
dc0e6e0544
Consolidate common drawing functions into a single header file. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
#ifndef _FB_DRAW_H
|
|
#define _FB_DRAW_H
|
|
|
|
#include <asm/types.h>
|
|
|
|
/*
|
|
* Compose two values, using a bitmask as decision value
|
|
* This is equivalent to (a & mask) | (b & ~mask)
|
|
*/
|
|
|
|
static inline unsigned long
|
|
comp(unsigned long a, unsigned long b, unsigned long mask)
|
|
{
|
|
return ((a ^ b) & mask) ^ b;
|
|
}
|
|
|
|
/*
|
|
* Create a pattern with the given pixel's color
|
|
*/
|
|
|
|
#if BITS_PER_LONG == 64
|
|
static inline unsigned long
|
|
pixel_to_pat( u32 bpp, u32 pixel)
|
|
{
|
|
switch (bpp) {
|
|
case 1:
|
|
return 0xfffffffffffffffful*pixel;
|
|
case 2:
|
|
return 0x5555555555555555ul*pixel;
|
|
case 4:
|
|
return 0x1111111111111111ul*pixel;
|
|
case 8:
|
|
return 0x0101010101010101ul*pixel;
|
|
case 12:
|
|
return 0x0001001001001001ul*pixel;
|
|
case 16:
|
|
return 0x0001000100010001ul*pixel;
|
|
case 24:
|
|
return 0x0000000001000001ul*pixel;
|
|
case 32:
|
|
return 0x0000000100000001ul*pixel;
|
|
default:
|
|
panic("pixel_to_pat(): unsupported pixelformat\n");
|
|
}
|
|
}
|
|
#else
|
|
static inline unsigned long
|
|
pixel_to_pat( u32 bpp, u32 pixel)
|
|
{
|
|
switch (bpp) {
|
|
case 1:
|
|
return 0xfffffffful*pixel;
|
|
case 2:
|
|
return 0x55555555ul*pixel;
|
|
case 4:
|
|
return 0x11111111ul*pixel;
|
|
case 8:
|
|
return 0x01010101ul*pixel;
|
|
case 12:
|
|
return 0x00001001ul*pixel;
|
|
case 16:
|
|
return 0x00010001ul*pixel;
|
|
case 24:
|
|
return 0x00000001ul*pixel;
|
|
case 32:
|
|
return 0x00000001ul*pixel;
|
|
default:
|
|
panic("pixel_to_pat(): unsupported pixelformat\n");
|
|
}
|
|
}
|
|
#endif
|
|
#endif /* FB_DRAW_H */
|