public abstract void saveAsImage(Image img, File target, String format)
throws IOException;
+ /**
+ * Scale a dimension.
+ *
+ *
+ * @param imageWidth
+ * the actual image width
+ * @param imageHeight
+ * the actual image height
+ * @param areaWidth
+ * the base width of the target dimension for snap sizes
+ * @param areaHeight
+ * the base height of the target dimension for snap sizes
+ * @param zoom
+ * the zoom factor (ignored on snap mode)
+ * @param snapMode
+ * NULL for no snap mode, TRUE to snap to width and FALSE for
+ * snap to height)
+ *
+ * @return the scaled size, width is [0] and height is [1] (minimum is 1x1)
+ */
+ protected static Integer[] scaleSize(int imageWidth, int imageHeight,
+ int areaWidth, int areaHeight, double zoom, Boolean snapMode) {
+ int width;
+ int height;
+ if (snapMode == null) {
+ width = (int) Math.round(imageWidth * zoom);
+ height = (int) Math.round(imageHeight * zoom);
+ } else if (snapMode) {
+ width = areaWidth;
+ height = (int) Math
+ .round((((double) areaWidth) / imageWidth) * imageHeight);
+ } else {
+ height = areaHeight;
+ width = (int) Math
+ .round((((double) areaHeight) / imageHeight) * imageWidth);
+
+ }
+
+ if (width < 1)
+ width = 1;
+ if (height < 1)
+ height = 1;
+
+ return new Integer[] { width, height };
+ }
+
/**
* Return the EXIF transformation flag of this image if any.
*