big docs

glonkers.1

@@ -4,16 +4,19 @@ glonkers \- Create windows and wallpapers with glsl fragment shaders.
 .SH SYNOPSIS
 glonkers [OPTIONS]... [FILE]
 .SH OPTIONS
+
 .PP
 --window
 .RS 4
 Create a window.
 .RE
+
 .PP
 --layer
 .RS 4
 Create wallpaper.
 .RE
+
 .PP
 --output
 .RS 4
@@ -21,6 +24,46 @@ Specify in the following arguments which outputs (monitors) that should be
 rendered to. \fB--\fR can be used to end selection. Use something like
 \fBwlr-randr\fR(1) to find out monitor names.
 .RE
+
+.PP
+--texture
+.RS 4
+Supply a list of paths to textures (max 4) that can be referenced in the
+shader with iChannel0, iChannel1, iChannel2, iChannel3.
+.RE
+
+.PP
+--
+.RS 4
+Stop listing outputs/textures.
+.RE
+
+.SH SHADER BUILTINS
+
+.PP
+\fBiTime\fR : float
+.RS 4
+Time since program start.
+.RE
+
+.PP
+\fBiResolution\fR : vec2
+.RS 4
+Resolution in (number of pixels) x & y.
+.RE
+
+.PP
+\fBiFrame\fR : int
+.RS 4
+The currently rendered frame.
+.RE
+
+.PP
+\fBiChannel\fR{\fB0\fR..\fB3\fR} : int
+.RS 4
+Samplers for provided textures.
+.RE
+
 .SH SEE ALSO
 \fBwlr-randr\fR(1)
 .PP