Java ColorSpace.toRGB方法代码示例

import java.awt.color.ColorSpace; //导入方法依赖的package包/类
public static void main(String[] args) {
   	int sr = 128;
	int sg = 1;
	int sb = 128;
	System.out.format("Input (sRGB) = %d, %d, %d\n", sr, sg, sb);
	System.out.format("XYZref = %10g, %10g, %10g\n", Xref,Yref,Zref);
	
	ColorSpace cs = new LabColorSpace();
	//float[] luv = cs.fromCIEXYZ(new float[] {.1f,.5f,.9f});
	float[] lab = cs.fromRGB(new float[] {sr/255f, sg/255f, sb/255f});

	System.out.format("Lab = %8f, %8f, %8f\n", lab[0],lab[2],lab[2]);
	//float[] xyz = cs.toCIEXYZ(luv);
	float[] srgb = cs.toRGB(lab);
	System.out.format("sRGB = %8f, %8f, %8f\n", 
			Math.rint(255*srgb[0]), Math.rint(255*srgb[1]), Math.rint(255*srgb[2]));
}
 

import java.awt.color.ColorSpace; //导入方法依赖的package包/类
public void runTest(Object ctx, int numReps) {
    final Context ictx = (Context) ctx;
    final ColorSpace cs = ictx.cs;

    final float[] val = ictx.val;

    do {
        try {
            cs.toRGB(val);
        } catch (Exception e) {
            e.printStackTrace();
        }
    } while (--numReps >= 0);
}
 

import java.awt.color.ColorSpace; //导入方法依赖的package包/类
/**
 * Creates a color in the specified <code>ColorSpace</code>
 * with the color components specified in the <code>float</code>
 * array and the specified alpha.  The number of components is
 * determined by the type of the <code>ColorSpace</code>.  For
 * example, RGB requires 3 components, but CMYK requires 4
 * components.
 * @param cspace the <code>ColorSpace</code> to be used to
 *                  interpret the components
 * @param components an arbitrary number of color components
 *                      that is compatible with the <code>ColorSpace</code>
 * @param alpha alpha value
 * @throws IllegalArgumentException if any of the values in the
 *         <code>components</code> array or <code>alpha</code> is
 *         outside of the range 0.0 to 1.0
 * @see #getComponents
 * @see #getColorComponents
 */
public Color(ColorSpace cspace, float components[], float alpha) {
    boolean rangeError = false;
    String badComponentString = "";
    int n = cspace.getNumComponents();
    fvalue = new float[n];
    for (int i = 0; i < n; i++) {
        if (components[i] < 0.0 || components[i] > 1.0) {
            rangeError = true;
            badComponentString = badComponentString + "Component " + i
                                 + " ";
        } else {
            fvalue[i] = components[i];
        }
    }
    if (alpha < 0.0 || alpha > 1.0) {
        rangeError = true;
        badComponentString = badComponentString + "Alpha";
    } else {
        falpha = alpha;
    }
    if (rangeError) {
        throw new IllegalArgumentException(
            "Color parameter outside of expected range: " +
            badComponentString);
    }
    frgbvalue = cspace.toRGB(fvalue);
    cs = cspace;
    value = ((((int)(falpha*255)) & 0xFF) << 24) |
            ((((int)(frgbvalue[0]*255)) & 0xFF) << 16) |
            ((((int)(frgbvalue[1]*255)) & 0xFF) << 8)  |
            ((((int)(frgbvalue[2]*255)) & 0xFF) << 0);
}
 

import java.awt.color.ColorSpace; //导入方法依赖的package包/类
/**
 * Creates a color in the specified {@code ColorSpace}
 * with the color components specified in the {@code float}
 * array and the specified alpha.  The number of components is
 * determined by the type of the {@code ColorSpace}.  For
 * example, RGB requires 3 components, but CMYK requires 4
 * components.
 * @param cspace the {@code ColorSpace} to be used to
 *                  interpret the components
 * @param components an arbitrary number of color components
 *                      that is compatible with the {@code ColorSpace}
 * @param alpha alpha value
 * @throws IllegalArgumentException if any of the values in the
 *         {@code components} array or {@code alpha} is
 *         outside of the range 0.0 to 1.0
 * @see #getComponents
 * @see #getColorComponents
 */
public Color(ColorSpace cspace, float components[], float alpha) {
    boolean rangeError = false;
    String badComponentString = "";
    int n = cspace.getNumComponents();
    fvalue = new float[n];
    for (int i = 0; i < n; i++) {
        if (components[i] < 0.0 || components[i] > 1.0) {
            rangeError = true;
            badComponentString = badComponentString + "Component " + i
                                 + " ";
        } else {
            fvalue[i] = components[i];
        }
    }
    if (alpha < 0.0 || alpha > 1.0) {
        rangeError = true;
        badComponentString = badComponentString + "Alpha";
    } else {
        falpha = alpha;
    }
    if (rangeError) {
        throw new IllegalArgumentException(
            "Color parameter outside of expected range: " +
            badComponentString);
    }
    frgbvalue = cspace.toRGB(fvalue);
    cs = cspace;
    value = ((((int)(falpha*255)) & 0xFF) << 24) |
            ((((int)(frgbvalue[0]*255)) & 0xFF) << 16) |
            ((((int)(frgbvalue[1]*255)) & 0xFF) << 8)  |
            ((((int)(frgbvalue[2]*255)) & 0xFF) << 0);
}