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
|
# -*- python -*-
# Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
#
# 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 <http://www.gnu.org/licenses/>.
cimport cython
from libc.stdlib cimport malloc, free
from libc.stdint cimport *
cdef extern int blueshift_randr_open(int use_screen, char* display)
'''
Start stage of colour curve control
@param use_screen The screen to use
@param display The display to use, `NULL` for the current one
@return Zero on success
'''
cdef extern uint16_t* blueshift_randr_read(int use_crtc)
'''
Gets the current colour curves
@param use_crtc The CRTC to use
@return {the size of the red curve, *the red curve,
the size of the green curve, *the green curve,
the size of the blue curve, *the blue curve},
needs to be free:d. `NULL` on error.
'''
cdef extern int blueshift_randr_apply(int use_crtc, uint16_t* r_curve, uint16_t* g_curve, uint16_t* b_curve)
'''
Apply stage of colour curve control
@param use_crtc The CRTC to use, -1 for all
@param r_curve The red colour curve
@param g_curve The green colour curve
@param b_curve The blue colour curve
@return Zero on success
'''
cdef extern void blueshift_randr_close()
'''
Resource freeing stage of colour curve control
'''
cdef uint16_t* r_c
'''
Storage space for the red colour curve in C native data structure
'''
cdef uint16_t* g_c
'''
Storage space for the green colour curve in C native data structure
'''
cdef uint16_t* b_c
'''
Storage space for the blue colour curve in C native data structure
'''
def randr_open(int use_screen, display):
'''
Start stage of colour curve control
@param use_screen The screen to use
@param display:bytes? The display to use, `None` for the current
@return :int Zero on success
'''
global r_c, g_c, b_c
# Get the display to use
cdef char* display_ = NULL
if display is not None:
display_ = display
# Allocate the storage space for the C native colour curves
r_c = <uint16_t*>malloc(256 * sizeof(uint16_t))
g_c = <uint16_t*>malloc(256 * sizeof(uint16_t))
b_c = <uint16_t*>malloc(256 * sizeof(uint16_t))
# Check for out-of-memory error
if (r_c is NULL) or (g_c is NULL) or (b_c is NULL):
raise MemoryError()
# Start using RandR for the screen and display
return blueshift_randr_open(use_screen, display_)
def randr_read(int use_crtc):
'''
Gets the current colour curves
@param use_crtc The CRTC to use
@return :(r:list<int>, g:list<int>, b:list<int>) The current red, green and blue colour curves
'''
cdef uint16_t* got
# Read the current curves
got = blueshift_randr_read(use_crtc)
if got is NULL:
raise Exception()
# Convert to Python integer lists
r, g, b, i = [], [], [], 0
for c in (r, g, b):
# while extracting the sizes of the curves
s = got[i]
i += 1
for j in range(s):
c.append(got[i + j])
i += s
# Free the native curves
free(got)
return (r, g, b)
def randr_apply(crtc_indices, r_curve, g_curve, b_curve):
'''
Apply stage of colour curve control
@param crtc_indices:list<int> The indices of the CRTC:s to control, -1 for all
@param r_curve:list<int> The red colour curve
@param g_curve:list<int> The green colour curve
@param b_curve:list<int> The blue colour curve
@return Zero on success
'''
# Convert curves to 16-bit C integers
for i in range(256):
r_c[i] = r_curve[i] & 0xFFFF
g_c[i] = g_curve[i] & 0xFFFF
b_c[i] = b_curve[i] & 0xFFFF
rc = 0
# For each selected CRTC,
for crtc_index in crtc_indices:
# apply curves.
rc |= blueshift_randr_apply(crtc_index, r_c, g_c, b_c)
return rc
def randr_close():
'''
Resource freeing stage of colour curve control
'''
# Free the storage space for the colour curves
free(r_c)
free(g_c)
free(b_c)
# Close free all resources in the native code
blueshift_randr_close()
|
