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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | #ifndef _FB_DRAW_H #define _FB_DRAW_H #include <asm/types.h> #include <linux/fb.h> #include <linux/bug.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 0x1001001001001001ul*pixel; case 16: return 0x0001000100010001ul*pixel; case 24: return 0x0001000001000001ul*pixel; case 32: return 0x0000000100000001ul*pixel; default: WARN(1, "pixel_to_pat(): unsupported pixelformat %d\n", bpp); return 0; } } #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 0x01001001ul*pixel; case 16: return 0x00010001ul*pixel; case 24: return 0x01000001ul*pixel; case 32: return 0x00000001ul*pixel; default: WARN(1, "pixel_to_pat(): unsupported pixelformat %d\n", bpp); return 0; } } #endif #ifdef CONFIG_FB_CFB_REV_PIXELS_IN_BYTE #if BITS_PER_LONG == 64 #define REV_PIXELS_MASK1 0x5555555555555555ul #define REV_PIXELS_MASK2 0x3333333333333333ul #define REV_PIXELS_MASK4 0x0f0f0f0f0f0f0f0ful #else #define REV_PIXELS_MASK1 0x55555555ul #define REV_PIXELS_MASK2 0x33333333ul #define REV_PIXELS_MASK4 0x0f0f0f0ful #endif static inline unsigned long fb_rev_pixels_in_long(unsigned long val, u32 bswapmask) { if (bswapmask & 1) val = comp(val >> 1, val << 1, REV_PIXELS_MASK1); if (bswapmask & 2) val = comp(val >> 2, val << 2, REV_PIXELS_MASK2); if (bswapmask & 3) val = comp(val >> 4, val << 4, REV_PIXELS_MASK4); return val; } static inline u32 fb_shifted_pixels_mask_u32(struct fb_info *p, u32 index, u32 bswapmask) { u32 mask; if (!bswapmask) { mask = FB_SHIFT_HIGH(p, ~(u32)0, index); } else { mask = 0xff << FB_LEFT_POS(p, 8); mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask; mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask)); #if defined(__i386__) || defined(__x86_64__) /* Shift argument is limited to 0 - 31 on x86 based CPU's */ if(index + bswapmask < 32) #endif mask |= FB_SHIFT_HIGH(p, ~(u32)0, (index + bswapmask) & ~(bswapmask)); } return mask; } static inline unsigned long fb_shifted_pixels_mask_long(struct fb_info *p, u32 index, u32 bswapmask) { unsigned long mask; if (!bswapmask) { mask = FB_SHIFT_HIGH(p, ~0UL, index); } else { mask = 0xff << FB_LEFT_POS(p, 8); mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask; mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask)); #if defined(__i386__) || defined(__x86_64__) /* Shift argument is limited to 0 - 31 on x86 based CPU's */ if(index + bswapmask < BITS_PER_LONG) #endif mask |= FB_SHIFT_HIGH(p, ~0UL, (index + bswapmask) & ~(bswapmask)); } return mask; } static inline u32 fb_compute_bswapmask(struct fb_info *info) { u32 bswapmask = 0; unsigned bpp = info->var.bits_per_pixel; if ((bpp < 8) && (info->var.nonstd & FB_NONSTD_REV_PIX_IN_B)) { /* * Reversed order of pixel layout in bytes * works only for 1, 2 and 4 bpp */ bswapmask = 7 - bpp + 1; } return bswapmask; } #else /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */ static inline unsigned long fb_rev_pixels_in_long(unsigned long val, u32 bswapmask) { return val; } #define fb_shifted_pixels_mask_u32(p, i, b) FB_SHIFT_HIGH((p), ~(u32)0, (i)) #define fb_shifted_pixels_mask_long(p, i, b) FB_SHIFT_HIGH((p), ~0UL, (i)) #define fb_compute_bswapmask(...) 0 #endif /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */ #define cpu_to_le_long _cpu_to_le_long(BITS_PER_LONG) #define _cpu_to_le_long(x) __cpu_to_le_long(x) #define __cpu_to_le_long(x) cpu_to_le##x #define le_long_to_cpu _le_long_to_cpu(BITS_PER_LONG) #define _le_long_to_cpu(x) __le_long_to_cpu(x) #define __le_long_to_cpu(x) le##x##_to_cpu static inline unsigned long rolx(unsigned long word, unsigned int shift, unsigned int x) { return (word << shift) | (word >> (x - shift)); } #endif /* FB_DRAW_H */ |