photomosaics

commit f1e77825b2929213aa2cab7cdefe5a188582ea32
parent e54815cd67e4ee484a0f3e87069ab4c0d11a1d8f
Author: Wilson Gheen <wilson@wilsonrgheen.com>
Date:   Sun, 25 Dec 2022 07:07:15 -0600

Move resizing into function

Diffstat:
M
photomosaics.c
 | 
53
+++++++++++++++++++++++++++++++++++++----------------

1 file changed, 37 insertions(+), 16 deletions(-)
diff --git a/photomosaics.c b/photomosaics.c
@@ -1,17 +1,50 @@
+#include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <MagickCore/MagickCore.h>
 
+void resize_image(Image *images, ImageInfo *image_info, float resize_factor, char *new_filename, ExceptionInfo *exception) {
+    Image *image, *resize_image;
+    Image *thumbnails = NewImageList();
+    while((image=RemoveFirstImageFromList(&images))) {
+        int new_width  = image->columns * resize_factor;
+        int new_height = image->rows * resize_factor;
+        resize_image = ResizeImage(image, new_width, new_height, LanczosFilter, exception);
+        printf("%zu x %zu\n", resize_image->columns, resize_image->rows);
+        if(!resize_image)
+            MagickError(exception->severity, exception->reason, exception->description);
+        AppendImageToList(&thumbnails, resize_image);
+        DestroyImage(image);
+    }
+
+    strcpy(thumbnails->filename, new_filename);
+    WriteImage(image_info, thumbnails, exception);
+
+    DestroyImageList(thumbnails);
+}
+
 int main(int argc, char **argv) {
     ExceptionInfo *exception;
-    Image *image, *images, *resize_image, *thumbnails;
+    Image *images;
     ImageInfo *image_info;
-    if(argc != 3) {
-        fprintf(stdout, "Usage: %s old_image new_image\n", argv[0]);
+    float resize_factor = 0.0;
+    char *endptr;
+    if(argc == 4) {
+        const char *old_locale = setlocale(LC_ALL, NULL);
+        setlocale(LC_ALL|~LC_NUMERIC, "");
+        resize_factor = strtof(argv[3], &endptr);
+        setlocale(LC_ALL, old_locale);
+    }
+    if(argc < 4 || !strncmp(argv[3], endptr, strlen(argv[3])) || resize_factor < 0.0) {
+        fprintf(stderr, "Usage: %s old_image new_image resize_factor\n", argv[0]);
         exit(2);
     }
+    if(resize_factor > 10.0) {
+        fprintf(stderr, "resize_factor %.1f is too big. Please don't break my computer.\n", resize_factor);
+        exit(1);
+    }
 
     MagickCoreGenesis(*argv, MagickTrue);
     exception = AcquireExceptionInfo();
@@ -22,20 +55,8 @@ int main(int argc, char **argv) {
         CatchException(exception);
     if(!images)
         exit(1);
+    resize_image(images, image_info, resize_factor, argv[2], exception);
 
-    thumbnails = NewImageList();
-    while((image=RemoveFirstImageFromList(&images))) {
-        resize_image = ResizeImage(image, 237, 282, LanczosFilter, exception);
-        if(!resize_image)
-            MagickError(exception->severity, exception->reason, exception->description);
-        AppendImageToList(&thumbnails, resize_image);
-        DestroyImage(image);
-    }
-    
-    strcpy(thumbnails->filename, argv[2]);
-    WriteImage(image_info, thumbnails, exception);
-
-    DestroyImageList(thumbnails);
     DestroyImageInfo(image_info);
     DestroyExceptionInfo(exception);
     MagickCoreTerminus();