eglGetProcAddress
return a GL or an EGL extension function
C Specification
void (* eglGetProcAddress)()(
| char const * procname) |
Description
eglGetProcAddress returns the address of
the extension function named by procname.
procname
must be a null-terminated string. The pointer returned
should be cast to a function pointer type matching the extension
function's definition in that extension specification. A return value
of NULL indicates that the specific
function does not exist for the EGL implementation.
A non-NULL return value does not guarantee
that an extension function is actually supported at runtime. The client
must also query
glGetString(GL_EXTENSIONS) or
eglQueryString(display,
EGL_EXTENSIONS) to determine if an
extension is supported by a particular context or display.
Function pointers returned by
eglGetProcAddress are independent of the
display and the currently bound context and may be used by any context
which supports the extension.
eglGetProcAddress may be queried for all
GL and EGL extension functions.
Copyright © 2003-2014 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.