| Antonino A. Daplas | dc0e6e0 | 2007-05-08 00:39:08 -0700 | [diff] [blame] | 1 | #ifndef _FB_DRAW_H |
| 2 | #define _FB_DRAW_H |
| 3 | |
| 4 | #include <asm/types.h> |
| 5 | |
| 6 | /* |
| 7 | * Compose two values, using a bitmask as decision value |
| 8 | * This is equivalent to (a & mask) | (b & ~mask) |
| 9 | */ |
| 10 | |
| 11 | static inline unsigned long |
| 12 | comp(unsigned long a, unsigned long b, unsigned long mask) |
| 13 | { |
| 14 | return ((a ^ b) & mask) ^ b; |
| 15 | } |
| 16 | |
| 17 | /* |
| 18 | * Create a pattern with the given pixel's color |
| 19 | */ |
| 20 | |
| 21 | #if BITS_PER_LONG == 64 |
| 22 | static inline unsigned long |
| 23 | pixel_to_pat( u32 bpp, u32 pixel) |
| 24 | { |
| 25 | switch (bpp) { |
| 26 | case 1: |
| 27 | return 0xfffffffffffffffful*pixel; |
| 28 | case 2: |
| 29 | return 0x5555555555555555ul*pixel; |
| 30 | case 4: |
| 31 | return 0x1111111111111111ul*pixel; |
| 32 | case 8: |
| 33 | return 0x0101010101010101ul*pixel; |
| 34 | case 12: |
| 35 | return 0x0001001001001001ul*pixel; |
| 36 | case 16: |
| 37 | return 0x0001000100010001ul*pixel; |
| 38 | case 24: |
| 39 | return 0x0000000001000001ul*pixel; |
| 40 | case 32: |
| 41 | return 0x0000000100000001ul*pixel; |
| 42 | default: |
| 43 | panic("pixel_to_pat(): unsupported pixelformat\n"); |
| 44 | } |
| 45 | } |
| 46 | #else |
| 47 | static inline unsigned long |
| 48 | pixel_to_pat( u32 bpp, u32 pixel) |
| 49 | { |
| 50 | switch (bpp) { |
| 51 | case 1: |
| 52 | return 0xfffffffful*pixel; |
| 53 | case 2: |
| 54 | return 0x55555555ul*pixel; |
| 55 | case 4: |
| 56 | return 0x11111111ul*pixel; |
| 57 | case 8: |
| 58 | return 0x01010101ul*pixel; |
| 59 | case 12: |
| 60 | return 0x00001001ul*pixel; |
| 61 | case 16: |
| 62 | return 0x00010001ul*pixel; |
| 63 | case 24: |
| 64 | return 0x00000001ul*pixel; |
| 65 | case 32: |
| 66 | return 0x00000001ul*pixel; |
| 67 | default: |
| 68 | panic("pixel_to_pat(): unsupported pixelformat\n"); |
| 69 | } |
| 70 | } |
| 71 | #endif |
| 72 | #endif /* FB_DRAW_H */ |