* Added file extension detection to modular codec

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3083 92316355-f0b4-4df1-b90c-862c8a59935f

pipi/codec/modular.c

@@ -1,3 +1,22 @@
+/*
+ *  libpipi       Pathetic image processing interface library
+ *  Copyright (c) 2004-2008 Sam Hocevar <sam@zoy.org>
+ *                2008 Jean-Yves Lamoureux <jylam@lnxscene.org>
+ *                All Rights Reserved
+ *
+ *  $Id$
+ *
+ *  This library is free software. It comes without any warranty, to
+ *  the extent permitted by applicable law. You can redistribute it
+ *  and/or modify it under the terms of the Do What The Fuck You Want
+ *  To Public License, Version 2, as published by Sam Hocevar. See
+ *  http://sam.zoy.org/wtfpl/COPYING for more details.
+ */
+
+/*
+ * modular.c: hand-written codecs multiplexer
+ */
+
 #include "modular.h"
 
 
@@ -8,5 +27,8 @@ pipi_image_t *pipi_load_modular(const char *name)
 
 int pipi_save_modular(pipi_image_t *img, const char *name)
 {
-    return pipi_save_jpeg(img, name);
+    if(!strncasecmp(&name[strlen(name) - 3], "jpg",  3) ||
+       !strncasecmp(&name[strlen(name) - 4], "jpeg", 4) )
+        return pipi_save_jpeg(img, name);
+    return -1;
 }

pipi/codec/modular/jpeg.c

@@ -47,13 +47,14 @@ pipi_image_t *pipi_load_jpeg(const char *name)
     FILE *fp = fopen(name, "rb");
     if(!fp) goto end;
 
-
+    /* Set callbacks */
     cinfo.err = jpeg_std_error(&jerr);
     jerr.error_exit = error_msg;
     jerr.emit_message = emit_msg;
     jerr.output_message = output_msg;
     jerr.format_message = format_msg;
 
+    /* Initialize libjpeg */
     jpeg_create_decompress(&cinfo);
     cinfo.client_data = 0x0;
     jpeg_stdio_src(&cinfo, fp);
@@ -69,12 +70,13 @@ pipi_image_t *pipi_load_jpeg(const char *name)
         goto end;
     }
 
+    /* One scanline */
     image = malloc(cinfo.output_width * cinfo.output_height * 4);
     if(!image) goto end;
 
     scanline = malloc(cinfo.output_width * 3);
 
-    /* Read scanlines, converting them to RGBA */
+
     for(i=0; i < cinfo.output_height; i++)
     {
         jpeg_read_scanlines(&cinfo, &scanline, 1);
@@ -133,7 +135,6 @@ int pipi_save_jpeg(pipi_image_t *img, const char *name)
 
     data = pixels->pixels;
 
-
     line = malloc(img->w * 3 * sizeof(unsigned char));
     if (!line)
         return 0;
@@ -174,7 +175,6 @@ int pipi_save_jpeg(pipi_image_t *img, const char *name)
             line[j++] = ((*ptr)) & 0xff;
             ptr++;
         }
-        /* write scanline */
         jbuf = (JSAMPROW *) (&line);
         jpeg_write_scanlines(&cinfo, jbuf, 1);
         y++;