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.Dd December 21, 2022
.Dt SG_PROGRAM 3
.Os Agar 1.7
.Sh NAME
.Nm SG_Program
.Nd Agar-SG vertex/fragment program
.Sh SYNOPSIS
.Bd -literal
#include <agar/core.h>
#include <agar/sg.h>
.Ed
.Sh DESCRIPTION
The
.Nm
object represents a generic vertex or pixel shader program.
Applications will rarely use the
.Nm
interface directly, since programs in specific languages will use
subclasses such as
.Xr SG_CgProgram 3 .
.Sh INHERITANCE HIERARCHY
.Xr AG_Object 3 ->
.Nm .
.Sh INTERNAL WIDGET API
The following functions are used by
.Xr SG_View 3
(or derived widgets), when rendering a scene.
.Pp
.nr nS 1
.Ft "int"
.Fn SG_ProgramInstall "SG_Program *prog" "SG_View *view"
.Pp
.Ft "void"
.Fn SG_ProgramDeinstall "SG_Program *prog" "SG_View *view"
.Pp
.Ft "void"
.Fn SG_ProgramBind "SG_Program *prog" "SG_View *view"
.Pp
.Ft "void"
.Fn SG_ProgramUnbind "SG_Program *prog" "SG_View *view"
.Pp
.nr nS 0
The
.Fn SG_ProgramInstall
function installs the program defined in
.Fa prog .
This generally involves verifying, compiling and uploading the code to
the hardware.
The program is not effective until bound.
.Pp
.Fn SG_ProgramDeinstall
deinstalls / releases the program defined in
.Fa prog .
.Pp
.Fn SG_ProgramBind
binds the program defined in
.Fa prog
to the current scene.
.Pp
.Fn SG_ProgramUnbind
unbinds the program defined in
.Fa prog
from the current scene.
.Sh SEE ALSO
.Xr SG 3 ,
.Xr SG_CgProgram 3 ,
.Xr SG_Intro 3 ,
.Xr SG_View 3
.Sh HISTORY
The
.Nm
object class first appeared in Agar 1.6.0.