From dc0e6e0544f1cb2af44e5d7a7e68acda05dec6fa Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Tue, 8 May 2007 00:39:08 -0700 Subject: fbdev: consolidate common drawing functions into a header file Consolidate common drawing functions into a single header file. Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/fb_draw.h | 72 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 drivers/video/fb_draw.h (limited to 'drivers/video/fb_draw.h') diff --git a/drivers/video/fb_draw.h b/drivers/video/fb_draw.h new file mode 100644 index 00000000000..c5c45203833 --- /dev/null +++ b/drivers/video/fb_draw.h @@ -0,0 +1,72 @@ +#ifndef _FB_DRAW_H +#define _FB_DRAW_H + +#include + + /* + * 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 */ -- cgit v1.2.3