org.javastack.qr.MatrixToImageConfig Maven / Gradle / Ivy

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/*
 * Copyright 2012 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.javastack.qr;

import java.awt.image.BufferedImage;

/**
 * Encapsulates custom configuration used in methods of {@link MatrixToImageWriter}.
 */
public final class MatrixToImageConfig {
	public static final int BLACK = 0xFF000000;
	public static final int WHITE = 0xFFFFFFFF;

	private final int onColor;
	private final int offColor;

	/**
	 * Creates a default config with on color {@link #BLACK} and off color {@link #WHITE}, generating normal
	 * black-on-white barcodes.
	 */
	public MatrixToImageConfig() {
		this(BLACK, WHITE);
	}

	/**
	 * @param onColor pixel on color, specified as an ARGB value as an int
	 * @param offColor pixel off color, specified as an ARGB value as an int
	 */
	public MatrixToImageConfig(int onColor, int offColor) {
		this.onColor = onColor;
		this.offColor = offColor;
	}

	public int getPixelOnColor() {
		return onColor;
	}

	public int getPixelOffColor() {
		return offColor;
	}

	int getBufferedImageColorModel() {
		if (onColor == BLACK && offColor == WHITE) {
			// Use faster BINARY if colors match default
			return BufferedImage.TYPE_BYTE_BINARY;
		}
		if (hasTransparency(onColor) || hasTransparency(offColor)) {
			// Use ARGB representation if colors specify non-opaque alpha
			return BufferedImage.TYPE_INT_ARGB;
		}
		// Default otherwise to RGB representation with ignored alpha channel
		return BufferedImage.TYPE_INT_RGB;
	}

	private static boolean hasTransparency(int argb) {
		return (argb & 0xFF000000) != 0xFF000000;
	}
}