Patch for image_processing.php file from WP e Commerce 3.7.8 plugin to avoid cut off problems with thumbnails

image_processing-3.7.8.php.patch

diff --git a/wp-content/plugins/wp-e-commerce/image_processing.php b/wp-content/plugins/wp-e-commerce/image_processing.php
index c2c3d78..ecf2fb9 100644
--- a/wp-content/plugins/wp-e-commerce/image_processing.php
+++ b/wp-content/plugins/wp-e-commerce/image_processing.php
@@ -43,16 +43,21 @@ global $wpdb;
 			$temp_w = $width;
 			$temp_h = $height;
 			// if the image is wider than it is high and at least as wide as the target width. 
-				if (($source_h <= $source_w)) {
-					if ($height < $width ) {
-						$temp_h = ($width / $source_w) * $source_h;
-					} else {
-						$temp_w = ($height / $source_h) * $source_w;
-					}
-					//$temp_w = ($height / $source_h) * $source_w;
-				} else {
-					$temp_h = ($width / $source_w) * $source_h;
-				}
+//				if (($source_h <= $source_w)) {
+//					if ($height < $width ) {
+//						$temp_h = ($width / $source_w) * $source_h;
+//					} else {
+//						$temp_w = ($height / $source_h) * $source_w;
+//					}
+//					//$temp_w = ($height / $source_h) * $source_w;
+//				} else {
+//					$temp_h = ($width / $source_w) * $source_h;
+//				}
+
+            // Resize ALWAYS keeping perspective - http://stackoverflow.com/questions/115462/proportional-image-resize
+            $ratio = min( (float) $width / (float) $source_w, (float) $height / (float) $source_h);
+            $temp_w = round($ratio * $source_w);
+            $temp_h = round($ratio * $source_h);
 	
 			// Create temp resized image
 //			exit(get_option('product_image_height'));
@@ -81,15 +86,19 @@ global $wpdb;
 			ImageAlphaBlending($dst_img, TRUE );
 			imagecolortransparent($dst_img, $white);
 
-	
+
+            // I replaced the code below with '($width - $temp_w) / 2, ($height - $temp_h)'
+            // in the ImageCopy call. That should center the resized image inside a thumbnail
+            // with the desired size - Willington Vega
+
 			// X & Y Offset to crop image properly
-			if($temp_w < $width) {
-				$w1 = ($width/2) - ($temp_w/2);
-			} else if($temp_w == $width) {
-				$w1 = 0;
-			} else {
-				$w1 = ($width/2) - ($temp_w/2);
-			}
+//			if($temp_w < $width) {
+//				$w1 = ($width/2) - ($temp_w/2);
+//			} else if($temp_w == $width) {
+//				$w1 = 0;
+//			} else {
+//				$w1 = ($width/2) - ($temp_w/2);
+//			}
 			
 			if($imagetype[2] == IMAGETYPE_PNG) {
 				imagesavealpha($dst_img,true);
@@ -99,7 +108,7 @@ global $wpdb;
 				
 			// Final thumbnail cropped from the center out.
 			//ImageCopyResampled( $dst_img, $temp_img, 0, 0, $w1, $h1, $width, $height, $width, $height );
-			ImageCopy( $dst_img, $temp_img, $w1, $h1, 0, 0, $temp_w, $temp_h );
+			ImageCopy( $dst_img, $temp_img, ($width - $temp_w) / 2, ($height - $temp_h) / 2, 0, 0, $temp_w, $temp_h );
 			
 			$image_quality = wpsc_image_quality();