eglconfig.h revision 358c5a8fd1d518930c3e87316a2c743a661ac553 
1#ifndef EGLCONFIG_INCLUDED
2#define EGLCONFIG_INCLUDED
3
4
5#include <assert.h>
6#include "egltypedefs.h"
7
8
9#define _EGL_CONFIG_FIRST_ATTRIB EGL_BUFFER_SIZE
10#define _EGL_CONFIG_LAST_ATTRIB EGL_CONFORMANT
11#define _EGL_CONFIG_NUM_ATTRIBS \
12   (_EGL_CONFIG_LAST_ATTRIB - _EGL_CONFIG_FIRST_ATTRIB + 1)
13
14#define _EGL_CONFIG_STORAGE_SIZE _EGL_CONFIG_NUM_ATTRIBS
15
16
17struct _egl_config
18{
19   EGLConfig Handle;   /* the public/opaque handle which names this config */
20   EGLint Storage[_EGL_CONFIG_STORAGE_SIZE];
21};
22
23
24#define SET_CONFIG_ATTRIB(CONF, ATTR, VAL) _eglSetConfigKey(CONF, ATTR, VAL)
25#define GET_CONFIG_ATTRIB(CONF, ATTR) _eglGetConfigKey(CONF, ATTR)
26
27
28/**
29 * Given a key, return an index into the storage of the config.
30 * Return -1 if the key is invalid.
31 */
32static INLINE EGLint
33_eglIndexConfig(const _EGLConfig *conf, EGLint key)
34{
35   (void) conf;
36   if (key >= _EGL_CONFIG_FIRST_ATTRIB &&
37       key < _EGL_CONFIG_FIRST_ATTRIB + _EGL_CONFIG_NUM_ATTRIBS)
38      return key - _EGL_CONFIG_FIRST_ATTRIB;
39   else
40      return -1;
41}
42
43
44/**
45 * Reset all keys in the config to a given value.
46 */
47static INLINE void
48_eglResetConfigKeys(_EGLConfig *conf, EGLint val)
49{
50   EGLint i;
51   for (i = 0; i < _EGL_CONFIG_NUM_ATTRIBS; i++)
52      conf->Storage[i] = val;
53}
54
55
56/**
57 * Update a config for a given key.
58 */
59static INLINE void
60_eglSetConfigKey(_EGLConfig *conf, EGLint key, EGLint val)
61{
62   EGLint idx = _eglIndexConfig(conf, key);
63   assert(idx >= 0);
64   conf->Storage[idx] = val;
65}
66
67
68/**
69 * Return the value for a given key.
70 */
71static INLINE EGLint
72_eglGetConfigKey(const _EGLConfig *conf, EGLint key)
73{
74   EGLint idx = _eglIndexConfig(conf, key);
75   assert(idx >= 0);
76   return conf->Storage[idx];
77}
78
79
80/**
81 * Set a given attribute.
82 *
83 * Because _eglGetConfigAttrib is already used as a fallback driver
84 * function, this function is not considered to have a good name.
85 * SET_CONFIG_ATTRIB is preferred over this function.
86 */
87static INLINE void
88_eglSetConfigAttrib(_EGLConfig *conf, EGLint attr, EGLint val)
89{
90   SET_CONFIG_ATTRIB(conf, attr, val);
91}
92
93
94extern void
95_eglInitConfig(_EGLConfig *config, EGLint id);
96
97
98extern EGLConfig
99_eglGetConfigHandle(_EGLConfig *config);
100
101
102extern _EGLConfig *
103_eglLookupConfig(EGLConfig config, _EGLDisplay *dpy);
104
105
106extern _EGLConfig *
107_eglAddConfig(_EGLDisplay *display, _EGLConfig *config);
108
109
110extern EGLBoolean
111_eglParseConfigAttribs(_EGLConfig *config, const EGLint *attrib_list);
112
113
114extern EGLBoolean
115_eglChooseConfig(_EGLDriver *drv, _EGLDisplay *dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config);
116
117
118extern EGLBoolean
119_eglGetConfigAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, EGLint attribute, EGLint *value);
120
121
122extern EGLBoolean
123_eglGetConfigs(_EGLDriver *drv, _EGLDisplay *dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config);
124
125
126#endif /* EGLCONFIG_INCLUDED */
127