Re: Mask Problems

[Havoc Pennington <hp redhat com>]

Brian Victor <bhv1 psu edu> writes: 
>   GdkBitmap *mask=NULL;
>
>   /* the window widget has already been shown at this point. */
>   gc = gdk_gc_new(window->window);
>   noteheadPM = gdk_pixmap_create_from_xpm_d (window->window, &mask,
>                                              &(window->style->white),

This argument is the color to fill in the transparent pixels with, or
NULL to use white. It's not the color to make transparent.

In XPM files, if the color is None then it's transparent. testgtk.c
has a couple of examples. Part of one is appended.

Havoc

So in this example ' ' chars are transparent:

static char * gtk_mini_xpm[] = {
"15 20 17 1",
"       c None",
".      c #14121F",
"+      c #278828",
"@      c #9B3334",
"#      c #284C72",
"$      c #24692A",
"%      c #69282E",
"&      c #37C539",
"*      c #1D2F4D",
"=      c #6D7076",
"-      c #7D8482",
";      c #E24A49",
">      c #515357",
",      c #9B9C9B",
"'      c #2FA232",
")      c #3CE23D",
"!      c #3B6CCB",
"               ",
"      ***>     ",
"    >.*!!!*    ",
"   ***....#*=  ",
"  *!*.!!!**!!# ",
" .!!#*!#*!!!!# ",
" @%#!.##.*!!$& ",
" @;%*!*.#!#')) ",
" @;;@%!!*$&)'' ",
" @% % %$'&)$+' ",