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
|
/*
* Copyright © 1998 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "pixman-xserver-compat.h"
static void
FbPixelsInit (FbPixels *pixels, pixman_bits_t *buf, int width, int height, int depth, int bpp, int stride);
static unsigned int
pixman_bits_per_pixel (unsigned int depth);
static unsigned int
pixman_bits_per_pixel (unsigned int depth)
{
if (depth > 8)
if (depth > 16)
return 32;
else
return 16;
else
if (depth > 4)
return 8;
else if (depth > 1)
return 4;
else
return 1;
}
FbPixels *
FbPixelsCreate (int width, int height, int depth)
{
FbPixels *pixels;
pixman_bits_t *buf;
unsigned int buf_size;
unsigned int bpp;
unsigned int stride;
unsigned int adjust;
unsigned int base;
bpp = pixman_bits_per_pixel (depth);
stride = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (pixman_bits_t);
buf_size = height * stride;
base = sizeof (FbPixels);
adjust = 0;
if (base & 7)
adjust = 8 - (base & 7);
buf_size += adjust;
pixels = calloc(base + buf_size, 1);
if (!pixels)
return NULL;
buf = (pixman_bits_t *) ((char *)pixels + base + adjust);
FbPixelsInit (pixels, buf, width, height, depth, bpp, stride);
return pixels;
}
FbPixels *
FbPixelsCreateForData (pixman_bits_t *data, int width, int height, int depth, int bpp, int stride)
{
FbPixels *pixels;
pixels = malloc (sizeof (FbPixels));
if (pixels == NULL)
return NULL;
FbPixelsInit (pixels, data, width, height, depth, bpp, stride);
return pixels;
}
static void
FbPixelsInit (FbPixels *pixels, pixman_bits_t *buf, int width, int height, int depth, int bpp, int stride)
{
pixels->data = buf;
pixels->width = width;
pixels->height = height;
pixels->depth = depth;
pixels->bpp = bpp;
pixels->stride = stride;
pixels->x = 0;
pixels->y = 0;
pixels->refcnt = 1;
}
void
FbPixelsDestroy (FbPixels *pixels)
{
if(--pixels->refcnt)
return;
free(pixels);
}
|
