maintain aspect ratio of only one of x or y are given

git-svn-id: http://svn.kfish.org/fastphoto/trunk@104 9c49b5d1-7df3-0310-bce2-b7278e68f44c

src/cgi.c

@@ -73,8 +73,8 @@ cgi_init (fastphoto_t * params)
 
   params->infile = path_translated;
   params->outfile = "/tmp/cache.jpg";
-  params->x = FASTPHOTO_DEFAULT_X;
-  params->y = FASTPHOTO_DEFAULT_Y;
+  params->x = 0;
+  params->y = 0;
 
   parse_query (params, query_string);
 

src/main.c

@@ -34,8 +34,8 @@ main (int argc, char * argv[])
 
         params.infile = argv[1];
         params.outfile = argv[2];
-        params.x = 128;
-        params.y = 128;
+        params.x = 0;
+        params.y = 0;
     }
 
     resize (&params);

src/resize.c

@@ -6,13 +6,25 @@ void
 resize (fastphoto_t * params)
 {
   Epeg_Image *im;
-  int x, y;
+  int x, y, w, h;
+
+  im = epeg_file_open(params->infile);
+
+  epeg_size_get (im, &w, &h);
 
   x = params->x;
   y = params->y;
 
-  im = epeg_file_open(params->infile);
+  if (x == 0 && y == 0) {
+    x = w;
+    y = h;
+  } else if (x == 0) {
+    x = w*y/h;
+  } else if (y == 0) {
+    y = h*x/w;
+  }
   epeg_decode_size_set(im, x, y);
+
   epeg_file_output_set(im, params->outfile);
   epeg_encode(im);
   epeg_close(im);