| Name |
| |
| EGL_EXT_config_select_group |
| |
| Name Strings |
| |
| EGL_EXT_config_select_group |
| |
| Contributors |
| |
| Hal Gentz <zegentzy@protonmail.com> |
| Adam Jackson <ajax@redhat.com> |
| Robert Mader <robert.mader@posteo.de> |
| |
| Contacts |
| |
| Hal Gentz <zegentzy@protonmail.com> |
| |
| Status |
| |
| Draft |
| |
| Version |
| |
| Version 4, 2021-06-24 |
| |
| Number |
| |
| EGL Extension #145 |
| |
| Extension Type |
| |
| EGL client extension |
| |
| Dependencies |
| |
| This extension is written against the wording of the 2014.08.27 revision |
| of the EGL 1.5 Specification. |
| |
| Overview |
| |
| This extension provides a mechanism to lower the config selection priority |
| of the configs returned by eglChooseConfig. A new config attribute is |
| introduced, providing a way for the implementation to group configs into |
| different config selection categories. The config selection priorities of |
| all the configs in one category may be higher or lower than the ones in |
| other categories. The config selection priorities in one category follow |
| the rules of eglChooseConfig. See also GLX_SGIX_visual_select_group. |
| |
| New Types |
| |
| None |
| |
| New Procedures and Functions |
| |
| None |
| |
| New Tokens |
| |
| Accepted as a new EGLConfig attribute: |
| |
| EGL_CONFIG_SELECT_GROUP_EXT 0x34C0 |
| |
| Additions to the EGL 1.5 Specification |
| |
| In section 3.4 "Configuration Management", under the "Buffer Descriptions |
| and Attributes" heading, append to table 3.1 the following: |
| |
| "EGL_CONFIG_SELECT_GROUP_EXT | integer | the config select group" |
| |
| In section 3.4 "Configuration Management", under the "Other EGLConfig |
| Attribute Descriptions" heading, append to the end the following: |
| |
| "The attribute EGL_CONFIG_SELECT_GROUP_EXT is used to specify the config |
| selection category of the config. Configs in the i-th category have a higher |
| config selection priority than those found in the (i+1)-th category. |
| |
| "The attribute EGL_CONFIG_SELECT_GROUP_EXT is used by the implementation to |
| override the default sorting rules, by collecting configurations into |
| groups. It is not accepted by the <attrib_list> parameter of |
| eglChooseConfig, but it is accepted as the <attribute> in |
| eglGetConfigAttrib." |
| |
| In section 3.4 "Configuration Management", under the "Sorting of EGLConfigs" |
| heading, append to table 3.4 the following: |
| |
| "EGL_CONFIG_SELECT_GROUP_EXT | 0 | Ignore | Smaller | 0" |
| |
| In section 3.4 "Configuration Management", under the "Sorting of EGLConfigs" |
| heading, append before the list entry which starts with "1. Special: by |
| EGL_CONFIG_CAVEAT" the following entry: |
| |
| "0. Smaller EGL_CONFIG_SELECT_GROUP_EXT." |
| |
| Issues |
| |
| None |
| |
| Revision History |
| |
| Version 4, 2021-06-24 (Robert Mader) |
| - Moved to EXT, changed enum value to 0x34C0. |
| |
| Version 3, 2020-04-06 (Robert Mader) |
| - Changed enum value to 0x31DF, added contributors. |
| |
| Version 2, 2019-07-11 (Hal Gentz) |
| - Resolved issues pointed out by Adam Jackson. |
| |
| Version 1, 2019-06-21 (Hal Gentz) |
| - Initial draft |