[libcaca] functional hacks to img2irc

[Rado S <regrado@web.de>]

Moinsen,

I'm currently using a patched aview from aalib to produce inline
images via a filter for replying to eMails with "mutt".

Looking around for alternatives, I came across img2irc, but it was
somehow not exactly what I needed (plain text), since it was
producing stupid mirc color codes. So I wanted to hack it to drop
the codes right where it produces them, but then I realized it was
just the "irc" export of several others. At first I was "yay", but
then went "d'oh", because among the various exporters is no plain
text one.

Can you please add one? :)
Please compare it to aview, images should be at least as
recognizable. (on 150x110 terminal ;)

In the meantime I hacked img2irc to accept a parameter to specify
which exporter to use, which would justify a rename to img2asc.
Default is now "ansi", because it lets me easily filter out the
ESC-codes to produce a plain text variant, but the result is still
inferior to aview, because cacaview probably depends on the missing
colors for best result.

Again, the attached patch for img2asc ;) is not perfect, but you get
the idea of what to change better.
You should probably remove the line
	fprintf(stderr, "%s: loading %s\n", format, argv[1]);
because I used it only for testing.

I've also changed some defaults (80 rather than 60 cols), and the
ratio of x/y fontsize to better match my standard font.
This reminded me that it would be better if the font ratio could be
specified on the cmd-line, too. IIRC aview doesn't have that yet
either.

Have fun.

-- 
© Rado S. -- You must provide YOUR effort for your goal!
EVERY effort counts: at least to show your attitude.
You're responsible for ALL you do: you get what you give.

diff -ur libcaca-0.99.beta11/src/img2irc.c caca-rado/src/img2irc.c
--- libcaca-0.99.beta11/src/img2irc.c	Fri Nov 10 16:37:33 2006
+++ caca-rado/src/img2irc.c	Fri Oct 26 20:58:38 2007
@@ -38,8 +38,9 @@
     unsigned long int len;
     struct image *i;
     int cols, lines;
+	char *format = "ansi";
 
-    if(argc < 2 || argc > 3)
+    if(argc < 2 || argc > 5)
     {
         fprintf(stderr, "%s: wrong argument count\n", argv[0]);
         usage(argc, argv);
@@ -49,6 +50,7 @@
     if(!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
     {
         fprintf(stderr, "%s: convert images to IRC file data\n", argv[0]);
+        fprintf(stderr, "use -f / --format: caca, ansi, html, html3\n");
         usage(argc, argv);
         return 0;
     }
@@ -60,6 +62,13 @@
         return 1;
     }
 
+    if(!strcmp(argv[1], "-f") || !strcmp(argv[1], "--format"))
+    {
+        format = argv[2];
+	argc-=2;argv+=2;
+        fprintf(stderr, "%s: loading %s\n", format, argv[1]);
+    }
+
     i = load_image(argv[1]);
     if(!i)
     {
@@ -70,8 +79,11 @@
 
     /* Assume a 6Ã?10 font */
     cols = argc == 3 ? atoi(argv[2]) : 0;
-    cols = cols ? cols : 60;
+    cols = cols ? cols : 80;
+/*
     lines = cols * i->h * 6 / i->w / 10;
+*/
+    lines = cols * i->h * 8 / i->w / 11;
 
     cucul_set_canvas_size(cv, cols, lines);
     cucul_set_color_ansi(cv, CUCUL_DEFAULT, CUCUL_TRANSPARENT);
@@ -80,7 +92,7 @@
 
     unload_image(i);
 
-    export = cucul_export_memory(cv, "irc", &len);
+    export = cucul_export_memory(cv, format, &len);
     fwrite(export, len, 1, stdout);
     free(export);