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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/video/fb_draw.h
8 * Compose two values, using a bitmask as decision value
9 * This is equivalent to (a & mask) | (b & ~mask)
12 static inline unsigned long
13 comp(unsigned long a
, unsigned long b
, unsigned long mask
)
15 return ((a
^ b
) & mask
) ^ b
;
19 * Create a pattern with the given pixel's color
22 #if BITS_PER_LONG == 64
23 static inline unsigned long
24 pixel_to_pat( u32 bpp
, u32 pixel
)
28 return 0xfffffffffffffffful
*pixel
;
30 return 0x5555555555555555ul
*pixel
;
32 return 0x1111111111111111ul
*pixel
;
34 return 0x0101010101010101ul
*pixel
;
36 return 0x0001001001001001ul
*pixel
;
38 return 0x0001000100010001ul
*pixel
;
40 return 0x0000000001000001ul
*pixel
;
42 return 0x0000000100000001ul
*pixel
;
44 panic("pixel_to_pat(): unsupported pixelformat\n");
48 static inline unsigned long
49 pixel_to_pat( u32 bpp
, u32 pixel
)
53 return 0xfffffffful
*pixel
;
55 return 0x55555555ul
*pixel
;
57 return 0x11111111ul
*pixel
;
59 return 0x01010101ul
*pixel
;
61 return 0x00001001ul
*pixel
;
63 return 0x00010001ul
*pixel
;
65 return 0x00000001ul
*pixel
;
67 return 0x00000001ul
*pixel
;
69 panic("pixel_to_pat(): unsupported pixelformat\n");
74 #ifdef CONFIG_FB_CFB_REV_PIXELS_IN_BYTE
75 #if BITS_PER_LONG == 64
76 #define REV_PIXELS_MASK1 0x5555555555555555ul
77 #define REV_PIXELS_MASK2 0x3333333333333333ul
78 #define REV_PIXELS_MASK4 0x0f0f0f0f0f0f0f0ful
80 #define REV_PIXELS_MASK1 0x55555555ul
81 #define REV_PIXELS_MASK2 0x33333333ul
82 #define REV_PIXELS_MASK4 0x0f0f0f0ful
85 static inline unsigned long fb_rev_pixels_in_long(unsigned long val
,
89 val
= comp(val
>> 1, val
<< 1, REV_PIXELS_MASK1
);
91 val
= comp(val
>> 2, val
<< 2, REV_PIXELS_MASK2
);
93 val
= comp(val
>> 4, val
<< 4, REV_PIXELS_MASK4
);
97 static inline u32
fb_shifted_pixels_mask_u32(u32 index
, u32 bswapmask
)
102 mask
= FB_SHIFT_HIGH(~(u32
)0, index
);
104 mask
= 0xff << FB_LEFT_POS(8);
105 mask
= FB_SHIFT_LOW(mask
, index
& (bswapmask
)) & mask
;
106 mask
= FB_SHIFT_HIGH(mask
, index
& ~(bswapmask
));
107 #if defined(__i386__) || defined(__x86_64__)
108 /* Shift argument is limited to 0 - 31 on x86 based CPU's */
109 if(index
+ bswapmask
< 32)
111 mask
|= FB_SHIFT_HIGH(~(u32
)0,
112 (index
+ bswapmask
) & ~(bswapmask
));
117 static inline unsigned long fb_shifted_pixels_mask_long(u32 index
, u32 bswapmask
)
122 mask
= FB_SHIFT_HIGH(~0UL, index
);
124 mask
= 0xff << FB_LEFT_POS(8);
125 mask
= FB_SHIFT_LOW(mask
, index
& (bswapmask
)) & mask
;
126 mask
= FB_SHIFT_HIGH(mask
, index
& ~(bswapmask
));
127 #if defined(__i386__) || defined(__x86_64__)
128 /* Shift argument is limited to 0 - 31 on x86 based CPU's */
129 if(index
+ bswapmask
< BITS_PER_LONG
)
131 mask
|= FB_SHIFT_HIGH(~0UL,
132 (index
+ bswapmask
) & ~(bswapmask
));
138 static inline u32
fb_compute_bswapmask(struct fb_info
*info
)
141 unsigned bpp
= info
->var
.bits_per_pixel
;
143 if ((bpp
< 8) && (info
->var
.nonstd
& FB_NONSTD_REV_PIX_IN_B
)) {
145 * Reversed order of pixel layout in bytes
146 * works only for 1, 2 and 4 bpp
148 bswapmask
= 7 - bpp
+ 1;
153 #else /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */
155 static inline unsigned long fb_rev_pixels_in_long(unsigned long val
,
161 #define fb_shifted_pixels_mask_u32(i, b) FB_SHIFT_HIGH(~(u32)0, (i))
162 #define fb_shifted_pixels_mask_long(i, b) FB_SHIFT_HIGH(~0UL, (i))
163 #define fb_compute_bswapmask(...) 0
165 #endif /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */
167 #endif /* FB_DRAW_H */