tint Areas BufferedImage - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Color

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Description

tint Areas BufferedImage

Demo Code


//package com.java2s;
import java.awt.Color;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.util.List;

public class Main {
    public static BufferedImage tintAreas(final BufferedImage input,
            final List<Rectangle> areas, final int sourceTintX,
            final int sourceTintY) throws Exception {
        BufferedImage image = input;
        switch (input.getType()) {
        case BufferedImage.TYPE_INT_ARGB:
        case BufferedImage.TYPE_INT_RGB:
            break;
        case BufferedImage.TYPE_4BYTE_ABGR:
            image = new BufferedImage(input.getWidth(), input.getHeight(),
                    BufferedImage.TYPE_INT_ARGB);
            image.getGraphics().drawImage(input, 0, 0, null);
            break;
        default://from   ww  w  .  j a  va 2  s . c  o  m
            throw new Exception(
                    "Input terrain texture, unhandled image data format: "
                            + input.getType());
        }

        boolean alpha = false;
        final int col = image.getRGB(sourceTintX, sourceTintY);
        final int red = col >> 16 & 0xff;
        final int green = col >> 8 & 0xff;
        final int blue = col & 0xff;
        final float[] hsb = Color.RGBtoHSB(red, green, blue, null);
        final float hue = hsb[0];
        final float saturation = hsb[1];// * 0.9f;

        switch (image.getType()) {
        case BufferedImage.TYPE_INT_ARGB:
            alpha = true;
            // Falls through on purpose.
        case BufferedImage.TYPE_INT_RGB:
            for (final Rectangle area : areas) {
                tintArea(image, area, alpha, hue, saturation);
            }
            break;
        default:
            throw new Exception(
                    "Tinting texture, unhandled image data format: "
                            + image.getType());
        }
        return image;
    }

    private static void tintArea(final BufferedImage input,
            final Rectangle area, final boolean alpha, final float hue,
            final float saturation) {
        for (int x = area.x; x < area.x + area.width; x++) {
            for (int y = area.y; y < area.y + area.height; y++) {
                final int col = input.getRGB(x, y);

                // Specify 3 RGB values
                final int red = col >> 16 & 0xff;
                final int green = col >> 8 & 0xff;
                final int blue = col & 0xff;

                final float[] hsb = Color.RGBtoHSB(red, green, blue, null);
                final float brightness = hsb[2];

                int argb = Color.HSBtoRGB(hue, saturation, brightness) & 0xffffff;

                // add alpha, if applicable
                if (alpha) {
                    argb |= col & 0xff000000;
                }

                // apply to image
                input.setRGB(x, y, argb);
            }
        }
    }
}

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