src/egl/main/eglconfig.h

   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
  17 struct _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  */
  32 static 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  */
  47 static 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  */
  59 static 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  */
  71 static 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  */
  87 static INLINE void
  88 _eglSetConfigAttrib(_EGLConfig *conf, EGLint attr, EGLint val)
  89 {
  90    SET_CONFIG_ATTRIB(conf, attr, val);
  91 }
  92
  93
  94 extern void
  95 _eglInitConfig(_EGLConfig *config, EGLint id);
  96
  97
  98 extern EGLConfig
  99 _eglGetConfigHandle(_EGLConfig *config);
 100
 101
 102 extern _EGLConfig *
 103 _eglLookupConfig(EGLConfig config, _EGLDisplay *dpy);
 104
 105
 106 extern _EGLConfig *
 107 _eglAddConfig(_EGLDisplay *display, _EGLConfig *config);
 108
 109
 110 extern EGLBoolean
 111 _eglValidateConfig(const _EGLConfig *conf, EGLBoolean for_matching);
 112
 113
 114 extern EGLBoolean
 115 _eglMatchConfig(const _EGLConfig *conf, const _EGLConfig *criteria);
 116
 117
 118 extern EGLBoolean
 119 _eglParseConfigAttribList(_EGLConfig *conf, const EGLint *attrib_list);
 120
 121
 122 extern EGLint
 123 _eglCompareConfigs(const _EGLConfig *conf1, const _EGLConfig *conf2,
 124                    const _EGLConfig *criteria, EGLBoolean compare_id);
 125
 126
 127 extern void
 128 _eglSortConfigs(const _EGLConfig **configs, EGLint count,
 129                 EGLint (*compare)(const _EGLConfig *, const _EGLConfig *,
 130                                   void *),
 131                 void *priv_data);
 132
 133
 134 extern EGLBoolean
 135 _eglChooseConfig(_EGLDriver *drv, _EGLDisplay *dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config);
 136
 137
 138 extern EGLBoolean
 139 _eglGetConfigAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, EGLint attribute, EGLint *value);
 140
 141
 142 extern EGLBoolean
 143 _eglGetConfigs(_EGLDriver *drv, _EGLDisplay *dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config);
 144
 145
 146 #endif /* EGLCONFIG_INCLUDED */