aboutsummaryrefslogtreecommitdiffstats
path: root/src/output.h
blob: b27059f713870979469c00d101142c649cf2cbfa (plain) (blame)
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
/**
 * gammad -- Cooperative gamma server
 * Copyright (C) 2016  Mattias Andrée (maandree@kth.se)
 * 
 * This library 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 library 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 library.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <stddef.h>

#include <libgamma.h>

#include "ramps.h"
#include "filter.h"



/**
 * Copy the ramp sizes
 * 
 * This macro supports both `struct output`
 * and `struct gamma_ramps`
 * 
 * @param  dest  The destination
 * @param  src   The source
 */
#define COPY_RAMP_SIZES(dest, src)         \
  ((dest)->red_size   = (src)->red_size,   \
   (dest)->green_size = (src)->green_size, \
   (dest)->blue_size  = (src)->blue_size)



/**
 * Information about an output
 */
struct output
{
  /**
   * -2: double
   * -1: float
   *  8: uint8_t
   * 16: uint16_t
   * 32: uint32_t
   * 64: uint64_t
   */
  signed depth;
  
  /**
   * The number of stops in the red gamma ramp
   */
  size_t red_size;
  
  /**
   * The number of stops in the green gamma ramp
   */
  size_t green_size;
  
  /**
   * The number of stops in the blue gamma ramp
   */
  size_t blue_size;
  
  /**
   * `.red_size + .green_size + .blue_size`
   * multiplied by the byte-size of each stop
   */
  size_t ramps_size;
  
  /**
   * Whether gamma ramps are supported
   */
  enum libgamma_decision supported;
  
  /**
   * The name of the output, will be its EDID
   * if available, otherwise it will be the
   * index of the partition, followed by a dot
   * and the index of the CRTC within the
   * partition, or if a name for the connector
   * is available: the index of the partition
   * followed by a dot and the name of the
   * connector
   */
  char* name;
  
  /**
   * The libgamma state for the output
   */
  libgamma_crtc_state_t* crtc;
  
  /**
   * Saved gamma ramps
   */
  union gamma_ramps saved_ramps;
  
  struct filter* table_filters;
  union gamma_ramps* table_sums;
  size_t table_alloc;
  size_t table_size;
};



/**
 * Free all resources allocated to an output.
 * The allocation of `output` itself is not freed.
 * 
 * @param  this  The output
 */
void output_destroy(struct output* this);

/**
 * Marshal an output
 * 
 * @param   this  The output
 * @param   buf   Output buffer for the marshalled output,
 *                `NULL` just measure how large the buffers
 *                needs to be
 * @return        The number of marshalled byte
 */
size_t output_marshal(const struct output* this, char* buf);

/**
 * Unmarshal an output
 * 
 * @param   this  Output for the output
 * @param   buf   Buffer with the marshalled output
 * @return        The number of unmarshalled bytes, 0 on error
 */
size_t output_unmarshal(struct output* this, const char* buf);