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egl: Document why EGL_OPENGL{, _ES}_API are mostly identical 

Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
This commit is contained in:
Adam Jackson 2016-09-07 17:41:56 -04:00
parent bad80c26e7
commit a279760536
1 changed files with 10 additions and 0 deletions
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10
src/egl/main/eglcontext.c
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@ -457,6 +457,16 @@ _eglParseContextAttribList(_EGLContext *ctx, _EGLDisplay *dpy,
/**
* Initialize the given _EGLContext object to defaults and/or the values
* in the attrib_list.
*
* According to EGL 1.5 Section 3.7:
*
* "EGL_OPENGL_API and EGL_OPENGL_ES_API are interchangeable for all
* purposes except eglCreateContext."
*
* And since we only support GL and GLES, this is the only place where the
* bound API matters at all. We look up the current API from the current
* thread, and stash that in the context we're initializing. Our caller is
* responsible for determining whether that's an API it supports.
*/
EGLBoolean
_eglInitContext(_EGLContext *ctx, _EGLDisplay *dpy, _EGLConfig *conf,