Example usage for java.awt Color getAlpha

Introduction

In this page you can find the example usage for java.awt Color getAlpha.

Prototype

public int getAlpha() 

Source Link

Document

Returns the alpha component in the range 0-255.

Usage

From source file:org.kalypso.commons.java.util.StringUtilities.java

/**
 * Converts a Color into a String./*from w  w w.j av a 2 s. com*/
 * <p>
 * String will have same format as specified in {@link StringUtilities#stringToColor(String)}
 * 
 * @param c
 * @throws IllegalArgumentException
 *           if color is null
 */
public static String colorToString(final Color c) {
    if (c == null)
        throw new IllegalArgumentException(
                Messages.getString("org.kalypso.commons.java.util.StringUtilities.1")); //$NON-NLS-1$

    final StringBuffer buf = new StringBuffer();

    buf.append(c.getRed()).append(";").append(c.getGreen()).append(";").append(c.getBlue()); //$NON-NLS-1$ //$NON-NLS-2$

    // alpha component is optional
    if (c.getAlpha() != 255)
        buf.append(";").append(c.getAlpha()); //$NON-NLS-1$

    return buf.toString();
}

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From source file:msi.gama.outputs.layers.charts.ChartJFreeChartOutputHeatmap.java

protected static final LookupPaintScale createLUT(final int ncol, final float vmin, final float vmax,
        final Color start, final Color end) {
    final float[][] colors = new float[][] {
            { start.getRed() / 255f, start.getGreen() / 255f, start.getBlue() / 255f, start.getAlpha() / 255f },
            { end.getRed() / 255f, end.getGreen() / 255f, end.getBlue() / 255f, end.getAlpha() / 255f } };
    final float[] limits = new float[] { 0, 1 };
    final LookupPaintScale lut = new LookupPaintScale(vmin, vmax, start);
    float val;
    float r, g, b, a;
    for (int j = 0; j < ncol; j++) {
        val = j / (ncol - 0.99f);
        final int i = 0;
        r = colors[i][0] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][0] - colors[i][0]);
        g = colors[i][1] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][1] - colors[i][1]);
        b = colors[i][2] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][2] - colors[i][2]);
        a = colors[i][3] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][3] - colors[i][3]);
        lut.add(val * (vmax - vmin) + vmin, new Color(r, g, b, a));
    }//  w  w w.  j ava  2s.c  om
    return lut;
}

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From source file:ColorUtil.java

/**
 * Make a color darker./*from  w ww .  j  av  a  2s.c om*/
 * 
 * @param color     Color to make darker.
 * @param fraction  Darkness fraction.
 * @return          Darker color.
 */
public static Color darker(Color color, double fraction) {
    int red = (int) Math.round(color.getRed() * (1.0 - fraction));
    int green = (int) Math.round(color.getGreen() * (1.0 - fraction));
    int blue = (int) Math.round(color.getBlue() * (1.0 - fraction));

    if (red < 0)
        red = 0;
    else if (red > 255)
        red = 255;
    if (green < 0)
        green = 0;
    else if (green > 255)
        green = 255;
    if (blue < 0)
        blue = 0;
    else if (blue > 255)
        blue = 255;

    int alpha = color.getAlpha();

    return new Color(red, green, blue, alpha);
}

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From source file:ColorUtil.java

/**
 * Make a color lighter./*w  w  w  .  j av  a 2 s  .  c  om*/
 * 
 * @param color     Color to make lighter.
 * @param fraction  Darkness fraction.
 * @return          Lighter color.
 */
public static Color lighter(Color color, double fraction) {
    int red = (int) Math.round(color.getRed() * (1.0 + fraction));
    int green = (int) Math.round(color.getGreen() * (1.0 + fraction));
    int blue = (int) Math.round(color.getBlue() * (1.0 + fraction));

    if (red < 0)
        red = 0;
    else if (red > 255)
        red = 255;
    if (green < 0)
        green = 0;
    else if (green > 255)
        green = 255;
    if (blue < 0)
        blue = 0;
    else if (blue > 255)
        blue = 255;

    int alpha = color.getAlpha();

    return new Color(red, green, blue, alpha);
}

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From source file:msi.gama.outputs.layers.charts.ChartJFreeChartOutputHeatmap.java

protected static final LookupPaintScale createLUT(final int ncol, final float vmin, final float vmax,
        final Color start, final Color med, final Color end) {
    final float[][] colors = new float[][] {
            { start.getRed() / 255f, start.getGreen() / 255f, start.getBlue() / 255f, start.getAlpha() / 255f },
            { med.getRed() / 255f, med.getGreen() / 255f, med.getBlue() / 255f, med.getAlpha() / 255f },
            { end.getRed() / 255f, end.getGreen() / 255f, end.getBlue() / 255f, end.getAlpha() / 255f } };
    final float[] limits = new float[] { 0, 0.5f, 1 };
    final LookupPaintScale lut = new LookupPaintScale(vmin, vmax, med);
    float val;
    float r, g, b, a;
    for (int j = 0; j < ncol; j++) {
        val = j / (ncol - 0.99f);
        int i = 0;
        for (i = 0; i < limits.length; i++) {
            if (val < limits[i]) {
                break;
            }//from   ww  w . j  a va  2  s.c  om
        }
        i = i - 1;
        r = colors[i][0] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][0] - colors[i][0]);
        g = colors[i][1] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][1] - colors[i][1]);
        b = colors[i][2] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][2] - colors[i][2]);
        a = colors[i][3] + (val - limits[i]) / (limits[i + 1] - limits[i]) * (colors[i + 1][3] - colors[i][3]);
        lut.add(val * (vmax - vmin) + vmin, new Color(r, g, b, a));
    }
    return lut;
}

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From source file:de.bund.bfr.knime.gis.views.canvas.CanvasUtils.java

public static Paint mixColors(Color backgroundColor, List<Color> colors, List<Double> alphas,
        boolean checkedInsteadOfStriped) {
    double rb = backgroundColor.getRed() / 255.0;
    double gb = backgroundColor.getGreen() / 255.0;
    double bb = backgroundColor.getBlue() / 255.0;
    double ab = backgroundColor.getAlpha() / 255.0;
    List<Color> cs = new ArrayList<>();

    for (int i = 0; i < colors.size(); i++) {
        double alpha = alphas.get(i);

        if (alpha > 0.0) {
            double r = colors.get(i).getRed() / 255.0 * alpha + rb * (1 - alpha);
            double g = colors.get(i).getGreen() / 255.0 * alpha + gb * (1 - alpha);
            double b = colors.get(i).getBlue() / 255.0 * alpha + bb * (1 - alpha);
            double a = colors.get(i).getAlpha() / 255.0 * alpha + ab * (1 - alpha);

            cs.add(new Color((float) r, (float) g, (float) b, (float) a));
        }/*from  w w  w  .j a  v a 2s  .c  om*/
    }

    if (cs.isEmpty()) {
        return backgroundColor;
    } else if (cs.size() == 1) {
        return cs.get(0);
    }

    BufferedImage img;
    int size = cs.size() * (checkedInsteadOfStriped ? EDGE_TEXTURE_SIZE : NODE_TEXTURE_SIZE);

    if (checkedInsteadOfStriped) {
        img = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);

        for (int x = 0; x < size; x++) {
            for (int y = 0; y < size; y++) {
                img.setRGB(x, y, cs.get((x / EDGE_TEXTURE_SIZE + y / EDGE_TEXTURE_SIZE) % cs.size()).getRGB());
            }
        }
    } else {
        img = new BufferedImage(size, 1, BufferedImage.TYPE_INT_ARGB);

        for (int x = 0; x < size; x++) {
            img.setRGB(x, 0, cs.get(x / NODE_TEXTURE_SIZE).getRGB());
        }
    }

    return new TexturePaint(img, new Rectangle(img.getWidth(), img.getHeight()));
}

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From source file:org.jtrfp.trcl.core.Texture.java

public static ByteBuffer indexed2RGBA8888(ByteBuffer indexedPixels, Color[] palette) {
    Color color;
    ByteBuffer buf = ByteBuffer.allocateDirect(indexedPixels.capacity() * 4);
    final int cap = indexedPixels.capacity();
    for (int i = 0; i < cap; i++) {
        color = palette[(indexedPixels.get() & 0xFF)];
        buf.put((byte) color.getRed());
        buf.put((byte) color.getGreen());
        buf.put((byte) color.getBlue());
        buf.put((byte) color.getAlpha());
    } // end for(i)
    buf.clear();// Rewind
    return buf;//from   ww w. j  a va  2s. co m
}

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From source file:org.apache.fop.render.rtf.TextAttributesConverter.java

/**
 * Reads background-color from bl and writes it to rtfAttr.
 *
 * @param bpb the CommonBorderPaddingBackground from which the properties are read
 * @param rtfAttr the RtfAttributes object the attributes are written to
 *///from www .j a  v a 2  s  .c o  m
private static void attrBackgroundColor(CommonBorderPaddingBackground bpb, RtfAttributes rtfAttr) {
    Color fopValue = bpb.backgroundColor;
    int rtfColor = 0;
    /* FOP uses a default background color of "transparent", which is
       actually a transparent black, which is generally not suitable as a
       default here. Changing FOP's default to "white" causes problems in
       PDF output, so we will look for the default here & change it to
       "auto". */
    if ((fopValue == null) || ((fopValue.getRed() == 0) && (fopValue.getGreen() == 0)
            && (fopValue.getBlue() == 0) && (fopValue.getAlpha() == 0))) {
        return;
    } else {
        rtfColor = convertFOPColorToRTF(fopValue);
    }

    rtfAttr.set(RtfText.ATTR_BACKGROUND_COLOR, rtfColor);
}

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From source file:org.openfaces.component.chart.impl.renderers.GradientXYBarPainterAdapter.java

@Override
public void paintBarShadow(Graphics2D g2, XYBarRenderer renderer, int row, int column, RectangularShape bar,
        RectangleEdge base, boolean pegShadow) {
    // handle a special case - if the bar colour has alpha == 0, it is
    // invisible so we shouldn't draw any shadow
    Paint itemPaint = renderer.getItemPaint(row, column);
    if (itemPaint instanceof Color) {
        Color c = (Color) itemPaint;
        if (c.getAlpha() == 0) {
            return;
        }//  w w  w  .  j a va  2  s. co  m
    }

    RectangularShape shadow = createShadow(bar, renderer.getShadowXOffset(), renderer.getShadowYOffset(), base,
            pegShadow);
    if (renderer instanceof XYBarRendererAdapter) {
        g2.setPaint(((XYBarRendererAdapter) renderer).getShadowPaint());
    }
    g2.fill(shadow);
}

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From source file:org.openfaces.component.chart.impl.renderers.StandardXYBarPainterAdapter.java

/**
 * Paints a single bar instance./*from  ww  w. j a  v a2s.c o  m*/
 *
 * @param g2        the graphics target.
 * @param renderer  the renderer.
 * @param row       the row index.
 * @param column    the column index.
 * @param bar       the bar
 * @param base      indicates which side of the rectangle is the base of the
 *                  bar.
 * @param pegShadow peg the shadow to the base of the bar?
 */
public void paintBarShadow(Graphics2D g2, XYBarRenderer renderer, int row, int column, RectangularShape bar,
        RectangleEdge base, boolean pegShadow) {

    // handle a special case - if the bar colour has alpha == 0, it is
    // invisible so we shouldn't draw any shadow
    Paint itemPaint = renderer.getItemPaint(row, column);
    if (itemPaint instanceof Color) {
        Color c = (Color) itemPaint;
        if (c.getAlpha() == 0) {
            return;
        }
    }

    RectangularShape shadow = createShadow(bar, renderer.getShadowXOffset(), renderer.getShadowYOffset(), base,
            pegShadow);
    if (renderer instanceof XYBarRendererAdapter) {
        g2.setPaint(((XYBarRendererAdapter) renderer).getShadowPaint());
    }
    g2.fill(shadow);

}

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