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.TH "al_have_opengl_extension" "3" "" "Allegro reference manual" ""
.SH NAME
al_have_opengl_extension \- Allegro 5 API
.SH SYNOPSIS
.IP
.EX
#include \f[B]<allegro5/allegro_opengl.h>\f[R]

bool al_have_opengl_extension(const char *extension)
.EE
.SH DESCRIPTION
This function is a helper to determine whether an OpenGL extension is
available on the given display or not.
.PP
Example:
.IP
.EX
bool packedpixels = al_have_opengl_extension(\[dq]GL_EXT_packed_pixels\[dq]);
.EE
.PP
If \f[I]packedpixels\f[R] is true then you can safely use the constants
related to the packed pixels extension.
.PP
Returns true if the extension is available; false otherwise.