Java 类java.awt.MultipleGradientPaint 实例源码

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

public static void drawGradient(ImageLayer layer, GradientType gradientType, GradientColorType colorType, MultipleGradientPaint.CycleMethod cycleMethod, Composite composite, UserDrag userDrag, boolean invert) {
    if (userDrag.isClick()) {
        return;
    }

    TmpDrawingLayer tmpDrawingLayer = layer.createTmpDrawingLayer(composite, true);
    Graphics2D g = tmpDrawingLayer.getGraphics();
    // repeated gradients are still jaggy
    g.setRenderingHint(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON);

    Color[] colors = {colorType.getStartColor(invert), colorType.getEndColor(invert)};
    Paint gradient = gradientType.getGradient(userDrag, colors, cycleMethod);

    g.setPaint(gradient);

    int width = tmpDrawingLayer.getWidth();
    int height = tmpDrawingLayer.getHeight();
    g.fillRect(0, 0, width, height);
    g.dispose();
    layer.mergeTmpDrawingImageDown();
}

private DiamondGradientPaintContext(UserDrag userDrag, Color startColor, Color endColor, ColorModel cm, MultipleGradientPaint.CycleMethod cycleMethod) {
    this.userDrag = userDrag;
    this.cycleMethod = cycleMethod;

    startAlpha = startColor.getAlpha();
    startRed = startColor.getRed();
    startGreen = startColor.getGreen();
    startBlue = startColor.getBlue();

    endAlpha = endColor.getAlpha();
    endRed = endColor.getRed();
    endGreen = endColor.getGreen();
    endBlue = endColor.getBlue();

    this.cm = cm;

    dragDist = userDrag.getDistance();
    double dragDistSqr = dragDist * dragDist;
    dragRelDX = (float) (userDrag.getDX() / dragDistSqr);
    dragRelDY = (float) (userDrag.getDY() / dragDistSqr);
}

private AngleGradientPaintContext(UserDrag userDrag, Color startColor, Color endColor, ColorModel cm, MultipleGradientPaint.CycleMethod cycleMethod) {
    this.userDrag = userDrag;
    this.cycleMethod = cycleMethod;

    startAlpha = startColor.getAlpha();
    startRed = startColor.getRed();
    startGreen = startColor.getGreen();
    startBlue = startColor.getBlue();

    endAlpha = endColor.getAlpha();
    endRed = endColor.getRed();
    endGreen = endColor.getGreen();
    endBlue = endColor.getBlue();

    this.cm = cm;
    drawAngle = userDrag.getDrawAngle();
}

private SpiralGradientPaintContext(boolean clockwise, UserDrag userDrag, Color startColor, Color endColor, ColorModel cm, MultipleGradientPaint.CycleMethod cycleMethod) {
    this.clockwise = clockwise;
    this.userDrag = userDrag;
    this.cycleMethod = cycleMethod;

    startAlpha = startColor.getAlpha();
    startRed = startColor.getRed();
    startGreen = startColor.getGreen();
    startBlue = startColor.getBlue();

    endAlpha = endColor.getAlpha();
    endRed = endColor.getRed();
    endGreen = endColor.getGreen();
    endBlue = endColor.getBlue();

    this.cm = cm;
    drawAngle = userDrag.getDrawAngle() + Math.PI;  // between 0 and 2*PI

    dragDistance = userDrag.getDistance();
}

public void setPaint(Paint paint) {
    if(paint == selectedPaint) {
        return;
    }
    Paint old = selectedPaint;
    selectedPaint = paint;
    if(paint instanceof Color) {
        tabbedPane.setSelectedComponent(colorPickerParent);
        colorPicker.setColor((Color)paint);
        alphaSlider.setValue(((Color)paint).getAlpha());
    }
    if(paint instanceof MultipleGradientPaint) {
        tabbedPane.setSelectedComponent(gradientPicker);
        gradientPicker.setGradient((MultipleGradientPaint)paint);
    }
    firePropertyChange("paint", old, selectedPaint);
}

/**
 * Creates a flat version of the current gradient. This is a linear gradient
 * from 0.0 to length,0. This gradient is suitable for drawing previews of
 * the real gradient.
 *
 * @param length
 * @return a gradient Paint with values between 0.0 and length
 */
private MultipleGradientPaint getFlatGradient(JXGradientChooser chooser, double length) {
    MultipleGradientPaint gp = chooser.getGradient();

    // set up the data for the gradient
    float[] fractions = gp.getFractions();
    Color[] colors = gp.getColors();

    // fill in the gradient
    Point2D start = new Point2D.Float(0, 0);
    Point2D end = new Point2D.Float((float) length, 0);
    MultipleGradientPaint paint = new LinearGradientPaint(
            (float) start.getX(),
            (float) start.getY(),
            (float) end.getX(),
            (float) end.getY(),
            fractions, colors);
    return paint;
}

/**
 * Creates a string representation of a {@code MultipleGradientPaint}. This
 * string is used for debugging purposes. Its contents cannot be guaranteed
 * between releases.
 * 
 * @param paint
 *                the {@code paint} to create a string for
 * @return a string representing the supplied {@code paint}
 */
public static String toString(MultipleGradientPaint paint) {
    StringBuffer buffer = new StringBuffer();
    buffer.append(paint.getClass().getName());
    Color[] colors = paint.getColors();
    float[] values = paint.getFractions();
    buffer.append("[");
    for(int i=0; i<colors.length; i++) {
        buffer.append("#").append(Integer.toHexString(colors[i].getRGB()));
        buffer.append(":");
        buffer.append(values[i]);
        buffer.append(", ");
    }
    buffer.append("]");
    return buffer.toString();
}

public MultipleGradientPaint calculateGradient() {
    List<Thumb<Color>> stops = getStops();
    int len = stops.size();

    // set up the data for the gradient
    float[] fractions = new float[len];
    Color[] colors = new Color[len];
    int i = 0;
    for (Thumb<Color> thumb : stops) {
        colors[i] = (Color)thumb.getObject();
        fractions[i] = thumb.getPosition();
        i++;
    }

    // get the final gradient
    this.setGradient(calculateGradient(fractions, colors));
    return getGradient();
}

private BufferedImage createGradientImage(Color... colors)
{
    final float[] fractions = new float[colors.length];

    final float step = 1.0F / colors.length;

    for (int i = 0; i < colors.length; i++)
    {
        fractions[i] = i * step;
    }

    final LinearGradientPaint gradient = new LinearGradientPaint(0, 0, 256, 1, fractions, colors, MultipleGradientPaint.CycleMethod.REPEAT);
    final BufferedImage bi = new BufferedImage(256, 1, BufferedImage.TYPE_INT_ARGB);
    final Graphics2D g = bi.createGraphics();
    try
    {
        g.setPaint(gradient);
        g.fillRect(0, 0, 256, 1);
    }
    finally
    {
        g.dispose();
    }
    return bi;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated OGLPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS) {
        return false;
    }

    OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData;
    OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig();
    if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) {
        return false;
    }

    return true;
}

/**
 * Returns true if the given MultipleGradientPaint instance can be
 * used by the accelerated D3DPaints.MultiGradient implementation.
 * A MultipleGradientPaint is considered valid if the following
 * conditions are met:
 *   - the number of gradient "stops" is <= MAX_FRACTIONS
 *   - the destination has support for fragment shaders
 */
@Override
boolean isPaintValid(SunGraphics2D sg2d) {
    MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint;
    // REMIND: ugh, this creates garbage; would be nicer if
    // we had a MultipleGradientPaint.getNumStops() method...
    if (paint.getFractions().length > MULTI_MAX_FRACTIONS_D3D) {
        return false;
    }

    D3DSurfaceData dstData = (D3DSurfaceData)sg2d.surfaceData;
    D3DGraphicsDevice gd = (D3DGraphicsDevice)
        dstData.getDeviceConfiguration().getDevice();
    if (!gd.isCapPresent(CAPS_LCD_SHADER)) {
        return false;
    }
    return true;
}

private void handleAsMap(Map<?, ?> map) {
    if(map.isEmpty()) {
        super.setValueInternal(null);
        return;
    }

    float x1 = (Float) getMapValue(map, "x1", 0f);
    float y1 = (Float) getMapValue(map, "y1", 0f);
    float x2 = (Float) getMapValue(map, "x2", 0f);
    float y2 = (Float) getMapValue(map, "y2", 0f);
    MultipleGradientPaint.CycleMethod cyclicMethod = MultipleGradientPaint.CycleMethod.NO_CYCLE;

    float[] fractions = parseFractions(map, map.get("fractions"));
    Color[] colors = parseColors(map, map.get("colors"));
    if (fractions.length != colors.length) {
        throw illegalValue(map, LinearGradientPaint.class);
    }
    Object cyclicValue = map.get("cycle");
    if (null != cyclicValue) {
        cyclicMethod = parseCyclicMethod(map, String.valueOf(cyclicValue));
    }

    super.setValueInternal(new LinearGradientPaint(x1, y1, x2, y2, fractions, colors, cyclicMethod));
}

private void handleAsMap(Map<?, ?> map) {
    if(map.isEmpty()) {
        super.setValueInternal(null);
        return;
    }

    float cx = (Float) getMapValue(map, "cx", 0f);
    float cy = (Float) getMapValue(map, "cy", 0f);
    float radius = (Float) getMapValue(map, "radius", 0f);
    float fx = (Float) getMapValue(map, "fx", 0f);
    float fy = (Float) getMapValue(map, "fy", 0f);
    MultipleGradientPaint.CycleMethod cyclicMethod = MultipleGradientPaint.CycleMethod.NO_CYCLE;

    float[] fractions = parseFractions(map, map.get("fractions"));
    Color[] colors = parseColors(map, map.get("colors"));
    if (fractions.length != colors.length) {
        throw illegalValue(map, RadialGradientPaint.class);
    }
    Object cyclicValue = map.get("cycle");
    if (null != cyclicValue) {
        cyclicMethod = parseCyclicMethod(map, String.valueOf(cyclicValue));
    }

    super.setValueInternal(new RadialGradientPaint(cx, cy, radius, fx, fy, fractions, colors, cyclicMethod));
}

public LinearGradientPaint getPaint(float startX, float endX, boolean quadratic) {
    if (dirtyPaint || colorPoints == null || colorsQuadratic == null || colorsLinear == null) {
        rebuildPaint();
    }

    return new LinearGradientPaint(startX, 0f, endX, 0f, colorPoints, quadratic ? colorsQuadratic : colorsLinear, MultipleGradientPaint.CycleMethod.NO_CYCLE);
}

private static MultipleGradientPaint.CycleMethod getCycleMethodFromString(String s) {
    switch (s) {
        case NO_CYCLE_AS_STRING:
            return NO_CYCLE;
        case REFLECT_AS_STRING:
            return REFLECT;
        case REPEAT_AS_STRING:
            return REPEAT;
    }
    throw new IllegalStateException("should not get here");
}

public SpiralGradientPaint(boolean clockwise, UserDrag userDrag, Color startColor, Color endColor, MultipleGradientPaint.CycleMethod cycleMethod) {
    this.clockwise = clockwise;
    this.userDrag = userDrag;
    this.startColor = startColor;
    this.endColor = endColor;
    this.cycleMethod = cycleMethod;
}