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1 | #ifndef _FB_DRAW_H |
2 | #define _FB_DRAW_H |
3 | |
4 | #include <asm/types.h> |
5 | #include <linux/fb.h> |
6 | #include <linux/bug.h> |
7 | |
8 | /* |
9 | * Compose two values, using a bitmask as decision value |
10 | * This is equivalent to (a & mask) | (b & ~mask) |
11 | */ |
12 | |
13 | static inline unsigned long |
14 | comp(unsigned long a, unsigned long b, unsigned long mask) |
15 | { |
16 | return ((a ^ b) & mask) ^ b; |
17 | } |
18 | |
19 | /* |
20 | * Create a pattern with the given pixel's color |
21 | */ |
22 | |
23 | #if BITS_PER_LONG == 64 |
24 | static inline unsigned long |
25 | pixel_to_pat( u32 bpp, u32 pixel) |
26 | { |
27 | switch (bpp) { |
28 | case 1: |
29 | return 0xfffffffffffffffful*pixel; |
30 | case 2: |
31 | return 0x5555555555555555ul*pixel; |
32 | case 4: |
33 | return 0x1111111111111111ul*pixel; |
34 | case 8: |
35 | return 0x0101010101010101ul*pixel; |
36 | case 12: |
37 | return 0x1001001001001001ul*pixel; |
38 | case 16: |
39 | return 0x0001000100010001ul*pixel; |
40 | case 24: |
41 | return 0x0001000001000001ul*pixel; |
42 | case 32: |
43 | return 0x0000000100000001ul*pixel; |
44 | default: |
45 | WARN(1, "pixel_to_pat(): unsupported pixelformat %d\n", bpp); |
46 | return 0; |
47 | } |
48 | } |
49 | #else |
50 | static inline unsigned long |
51 | pixel_to_pat( u32 bpp, u32 pixel) |
52 | { |
53 | switch (bpp) { |
54 | case 1: |
55 | return 0xfffffffful*pixel; |
56 | case 2: |
57 | return 0x55555555ul*pixel; |
58 | case 4: |
59 | return 0x11111111ul*pixel; |
60 | case 8: |
61 | return 0x01010101ul*pixel; |
62 | case 12: |
63 | return 0x01001001ul*pixel; |
64 | case 16: |
65 | return 0x00010001ul*pixel; |
66 | case 24: |
67 | return 0x01000001ul*pixel; |
68 | case 32: |
69 | return 0x00000001ul*pixel; |
70 | default: |
71 | WARN(1, "pixel_to_pat(): unsupported pixelformat %d\n", bpp); |
72 | return 0; |
73 | } |
74 | } |
75 | #endif |
76 | |
77 | #ifdef CONFIG_FB_CFB_REV_PIXELS_IN_BYTE |
78 | #if BITS_PER_LONG == 64 |
79 | #define REV_PIXELS_MASK1 0x5555555555555555ul |
80 | #define REV_PIXELS_MASK2 0x3333333333333333ul |
81 | #define REV_PIXELS_MASK4 0x0f0f0f0f0f0f0f0ful |
82 | #else |
83 | #define REV_PIXELS_MASK1 0x55555555ul |
84 | #define REV_PIXELS_MASK2 0x33333333ul |
85 | #define REV_PIXELS_MASK4 0x0f0f0f0ful |
86 | #endif |
87 | |
88 | static inline unsigned long fb_rev_pixels_in_long(unsigned long val, |
89 | u32 bswapmask) |
90 | { |
91 | if (bswapmask & 1) |
92 | val = comp(val >> 1, val << 1, REV_PIXELS_MASK1); |
93 | if (bswapmask & 2) |
94 | val = comp(val >> 2, val << 2, REV_PIXELS_MASK2); |
95 | if (bswapmask & 3) |
96 | val = comp(val >> 4, val << 4, REV_PIXELS_MASK4); |
97 | return val; |
98 | } |
99 | |
100 | static inline u32 fb_shifted_pixels_mask_u32(struct fb_info *p, u32 index, |
101 | u32 bswapmask) |
102 | { |
103 | u32 mask; |
104 | |
105 | if (!bswapmask) { |
106 | mask = FB_SHIFT_HIGH(p, ~(u32)0, index); |
107 | } else { |
108 | mask = 0xff << FB_LEFT_POS(p, 8); |
109 | mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask; |
110 | mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask)); |
111 | #if defined(__i386__) || defined(__x86_64__) |
112 | /* Shift argument is limited to 0 - 31 on x86 based CPU's */ |
113 | if(index + bswapmask < 32) |
114 | #endif |
115 | mask |= FB_SHIFT_HIGH(p, ~(u32)0, |
116 | (index + bswapmask) & ~(bswapmask)); |
117 | } |
118 | return mask; |
119 | } |
120 | |
121 | static inline unsigned long fb_shifted_pixels_mask_long(struct fb_info *p, |
122 | u32 index, |
123 | u32 bswapmask) |
124 | { |
125 | unsigned long mask; |
126 | |
127 | if (!bswapmask) { |
128 | mask = FB_SHIFT_HIGH(p, ~0UL, index); |
129 | } else { |
130 | mask = 0xff << FB_LEFT_POS(p, 8); |
131 | mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask; |
132 | mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask)); |
133 | #if defined(__i386__) || defined(__x86_64__) |
134 | /* Shift argument is limited to 0 - 31 on x86 based CPU's */ |
135 | if(index + bswapmask < BITS_PER_LONG) |
136 | #endif |
137 | mask |= FB_SHIFT_HIGH(p, ~0UL, |
138 | (index + bswapmask) & ~(bswapmask)); |
139 | } |
140 | return mask; |
141 | } |
142 | |
143 | |
144 | static inline u32 fb_compute_bswapmask(struct fb_info *info) |
145 | { |
146 | u32 bswapmask = 0; |
147 | unsigned bpp = info->var.bits_per_pixel; |
148 | |
149 | if ((bpp < 8) && (info->var.nonstd & FB_NONSTD_REV_PIX_IN_B)) { |
150 | /* |
151 | * Reversed order of pixel layout in bytes |
152 | * works only for 1, 2 and 4 bpp |
153 | */ |
154 | bswapmask = 7 - bpp + 1; |
155 | } |
156 | return bswapmask; |
157 | } |
158 | |
159 | #else /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */ |
160 | |
161 | static inline unsigned long fb_rev_pixels_in_long(unsigned long val, |
162 | u32 bswapmask) |
163 | { |
164 | return val; |
165 | } |
166 | |
167 | #define fb_shifted_pixels_mask_u32(p, i, b) FB_SHIFT_HIGH((p), ~(u32)0, (i)) |
168 | #define fb_shifted_pixels_mask_long(p, i, b) FB_SHIFT_HIGH((p), ~0UL, (i)) |
169 | #define fb_compute_bswapmask(...) 0 |
170 | |
171 | #endif /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */ |
172 | |
173 | #define cpu_to_le_long _cpu_to_le_long(BITS_PER_LONG) |
174 | #define _cpu_to_le_long(x) __cpu_to_le_long(x) |
175 | #define __cpu_to_le_long(x) cpu_to_le##x |
176 | |
177 | #define le_long_to_cpu _le_long_to_cpu(BITS_PER_LONG) |
178 | #define _le_long_to_cpu(x) __le_long_to_cpu(x) |
179 | #define __le_long_to_cpu(x) le##x##_to_cpu |
180 | |
181 | static inline unsigned long rolx(unsigned long word, unsigned int shift, unsigned int x) |
182 | { |
183 | return (word << shift) | (word >> (x - shift)); |
184 | } |
185 | |
186 | #endif /* FB_DRAW_H */ |
187 |
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