QuantifyPacked28.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
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 * PlantUML distributed in the hope that it will be useful, but
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 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
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 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
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 * Original Author:  Arnaud Roques
 * With assistance from ChatGPT (OpenAI)
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 */
package net.sourceforge.plantuml.png.quant;

import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;

public final class QuantifyPacked28 {

	public static BufferedImage quantifyMeIfPossible(RenderedImage input) {

		// Convert to a BufferedImage in ARGB format if needed
		final BufferedImage src = QuantUtils.toBufferedARGB(input);
		if (src == null)
			return null;

		final int w = src.getWidth();
		final int h = src.getHeight();

		final BufferedImage dst = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);

		final int[] pixels = src.getRGB(0, 0, w, h, null, 0, w);
		final int[] out = new int[pixels.length];

		for (int i = 0; i < pixels.length; i++) {
			final int argb = pixels[i];
			out[i] = QuantUtils.compressPackedARGB(argb);
		}

		dst.setRGB(0, 0, w, h, out, 0, w);
		return dst;
	}

}