# HG changeset patch
# User meillo@marmaro.de
# Date 1213438686 -7200
# Node ID 8e2804fe30bc040dc140eafc140d4c7e5e8694b2
# Parent  aa24986b89698bf2f5c96b48acbc910bea2c9b04
skipps now too small images; added --version and --help

diff -r aa24986b8969 -r 8e2804fe30bc resize-gd.c
--- a/resize-gd.c	Sat Jun 14 12:00:23 2008 +0200
+++ b/resize-gd.c	Sat Jun 14 12:18:06 2008 +0200
@@ -17,6 +17,8 @@
 #include <ctype.h>
 #include "gd.h" /* Bring in the gd library functions */
 
+#define PROGRAM "resize-gd"
+#define VERSION "0.1"
 
 enum {
 	Png,
@@ -30,13 +32,19 @@
 
 
 void
+version() {
+	printf("%s version: %s\n", PROGRAM, VERSION);
+}
+
+
+void
 usage() {
-	puts("\
-usage: resize-gd <size> <imagefiles> [...]\n\
+	printf("\
+usage: %s <size> <imagefiles> [...]\n\
          (keeps aspect ratio, does not enlarge images)\n\
-       resize-gd <width>x<height> <imagefiles> [...]\n\
+       %s <width>x<height> <imagefiles> [...]\n\
          (resizes to that size, enlarges if needed)\n\
-");
+", PROGRAM, PROGRAM);
 }
 
 
@@ -92,6 +100,15 @@
 	char* c;
 	struct size sizeopt, sizeimg, sizedest;
 
+	if (argc == 2 && strcmp(argv[1], "--version") == 0) {
+		version();
+		exit(0);
+	}
+	if (argc == 2 && strcmp(argv[1], "--help") == 0) {
+		version();
+		usage();
+		exit(0);
+	}
 	if (argc < 3) {
 		usage();
 		exit(1);
@@ -100,7 +117,7 @@
 	if (!validsize(argv[1])) {
 		fprintf(stderr, "Invalid form of size. Has to be <size> or <width>x<height>.\n");
 		usage();
-		exit(3);
+		exit(2);
 	}
 
 	/* parse width and height */
@@ -151,6 +168,12 @@
 		sizeimg.h = im_in->sy;
 		sizedest = calcsize(sizeopt, sizeimg, 0);
 
+		/* skip images that dont need to be resized */
+		if (sizedest.w == sizeimg.w && sizedest.h == sizeimg.h) {
+			gdImageDestroy(im_in);
+			continue;
+		}
+
 		/* copy-resize the image */
 		im_out = gdImageCreateTrueColor(sizedest.w, sizedest.h);
 		gdImageCopyResampled(im_out, im_in, 0, 0, 0, 0, im_out->sx, im_out->sy, im_in->sx, im_in->sy);