private static final int LUMINANCE_SHIFT = 8 - LUMINANCE_BITS;
private static final int LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS;
+ /**
+ * Creates an instance that uses the entire given image as a source of pixels to decode.
+ *
+ * @param image image to decode
+ */
public BufferedImageMonochromeBitmapSource(BufferedImage image) {
this(image, 0, 0, image.getWidth(), image.getHeight());
}
+ /**
+ * Creates an instance that uses only a region of the given image as a source of pixels to decode.
+ *
+ * @param image image to decode a region of
+ * @param left x coordinate of leftmost pixels to decode
+ * @param top y coordinate of topmost pixels to decode
+ * @param right one more than the x coordinate of rightmost pixels to decode. That is, we will decode
+ * pixels whose x coordinate is in [left,right)
+ * @param bottom likewise, one more than the y coordinate of the bottommost pixels to decode
+ */
public BufferedImageMonochromeBitmapSource(BufferedImage image, int left, int top, int right, int bottom) {
this.image = image;
blackPoint = 0x7F;
lastArgument = 0;
int sourceHeight = image.getHeight();
int sourceWidth = image.getWidth();
- if (left < 0 || top < 0 || right >= sourceWidth || bottom >= sourceHeight || right <= left || bottom <= top) {
+ if (left < 0 || top < 0 || right > sourceWidth || bottom > sourceHeight || right <= left || bottom <= top) {
throw new IllegalArgumentException("Invalid bounds: (" + top + ',' + left + ") (" + right + ',' + bottom + ')');
}
this.left = left;