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
|
/* UIKit Tools - command-line utilities for UIKit
* Copyright (C) 2018-2019 Sam Bingner
* Copyright (C) 2008-2012 Jay Freeman (saurik)
*/
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* Modified BSD License {{{ */
/*
* Redistribution and use in source and binary
* forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the
* above copyright notice, this list of conditions
* and the following disclaimer.
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions
* and the following disclaimer in the documentation
* and/or other materials provided with the
* distribution.
* 3. The name of the author may not be used to endorse
* or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* }}} */
#include <mach/mach.h>
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <IOKit/IOKitLib.h>
#if 0
set -e
sdk=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++ \
-Wall -fmessage-length=0 \
-arch armv6 -miphoneos-version-min=2.0 \
-isysroot "${sdk}" -I. -F"${sdk}"/System/Library/PrivateFrameworks \
-framework IOKit -framework IOMobileFramebuffer \
-o iomfsetgamma iomfsetgamma.c
ldid iomfsetgamma
exit 0
#endif
typedef void *IOMobileFramebufferRef;
kern_return_t IOMobileFramebufferOpen(io_service_t, mach_port_t, void *, IOMobileFramebufferRef *);
kern_return_t IOMobileFramebufferSetGammaTable(IOMobileFramebufferRef, void *);
kern_return_t (*$IOMobileFramebufferGetGammaTable)(IOMobileFramebufferRef, void *);
#define _assert(test) \
if (!(test)) { \
fprintf(stderr, "_assert(%s)\n", #test); \
exit(-1); \
}
int main(int argc, char *argv[]) {
if (argc != 4) {
fprintf(stderr, "usage: iomfsetgamma <red> <green> <blue>\n");
fprintf(stderr, " example: 1.00 0.78 0.64\n");
return 1;
}
unsigned rs = strtod(argv[1], NULL) * 0x100;
_assert(rs <= 0x100);
unsigned gs = strtod(argv[2], NULL) * 0x100;
_assert(gs <= 0x100);
unsigned bs = strtod(argv[3], NULL) * 0x100;
_assert(bs <= 0x100);
kern_return_t error;
mach_port_t self = mach_task_self();
io_service_t service = 0;
if (service == 0)
service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleCLCD"));
if (service == 0)
service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleH1CLCD"));
if (service == 0)
service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleM2CLCD"));
_assert(service != 0);
IOMobileFramebufferRef fb;
error = IOMobileFramebufferOpen(service, self, 0, &fb);
_assert(error == 0);
uint32_t data[0xc00 / sizeof(uint32_t)];
memset(data, 0, sizeof(data));
FILE *file = fopen("/tmp/.iomfgamma.dat", "rb");
if (file == NULL) {
$IOMobileFramebufferGetGammaTable = dlsym(RTLD_DEFAULT, "IOMobileFramebufferGetGammaTable");
_assert($IOMobileFramebufferGetGammaTable != NULL);
error = $IOMobileFramebufferGetGammaTable(fb, data);
_assert(error == 0);
file = fopen("/tmp/.iomfgamma.dat", "wb");
_assert(file != NULL);
fwrite(data, 1, sizeof(data), file);
fclose(file);
file = fopen("/tmp/.iomfgamma.dat", "rb");
_assert(file != NULL);
}
fread(data, 1, sizeof(data), file);
fclose(file);
size_t i;
for (i = 0; i != 256; ++i) {
int j = 255 - i;
int r = j * rs >> 8;
int g = j * gs >> 8;
int b = j * bs >> 8;
data[j + 0x000] = data[r + 0x000];
data[j + 0x100] = data[g + 0x100];
data[j + 0x200] = data[b + 0x200];
}
error = IOMobileFramebufferSetGammaTable(fb, data);
_assert(error == 0);
return 0;
}
|
