Java Utililty Methods RGB Color Create

List of utility methods to do RGB Color Create

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Description

The list of methods to do RGB Color Create are organized into topic(s).

Method

doubleRGB_PNSR(int[] rgb1, int[] rgb2)
Calculate the peak signal-to-noise ratio 
return PNSR(RGB_MSE(rgb1, rgb2), 255);
doublergb_xyz(double r)
rgxyz 
if ((r /= 255.0) <= 0.04045) {
    return r / 12.92;
} else {
    return Math.pow((r + 0.055) / 1.055, 2.4);
doublergba(double r, double g, double b, double a)
rgba 
return Double.longBitsToDouble(Math.round(a * 0xFFFF) << 48 | (colorLargeDigit(r) << 32)
        | (colorLargeDigit(g) << 16) | colorLargeDigit(b));
StringRGBA(int r, int g, int b, float a)
Gets rgba() string from SAC rgba LexicalUnit value 
return String.format("rgba(%s, %s, %s, %s)", r, g, b, a);
intRGBA(int r, int g, int b, int a)
Convert to integer RGBA value 
return (a << 24) | ((r & 255) << 16) | ((g & 255) << 8) | (b & 255);
intrgba(int red, int green, int blue)
Returns the RGB color as int. 
int rgba = 255;
rgba = (rgba << 8) + red;
rgba = (rgba << 8) + green;
rgba = (rgba << 8) + blue;
return rgba;
intrgba_bilinear_filter(int rgb00, int rgb01, int rgb10, int rgb11, int u, int v)
rgbbilineafilter 
int ag0, ag1, rb0, rb1;
rb0 = (rgb00 & 0x00ff00ff) + ((((rgb01 & 0x00ff00ff) - (rgb00 & 0x00ff00ff)) * u) >> 8);
rb1 = (rgb10 & 0x00ff00ff) + ((((rgb11 & 0x00ff00ff) - (rgb10 & 0x00ff00ff)) * u) >> 8);
rgb00 >>= 8;
rgb01 >>= 8;
rgb10 >>= 8;
rgb11 >>= 8;
ag0 = (rgb00 & 0x00ff00ff) + ((((rgb01 & 0x00ff00ff) - (rgb00 & 0x00ff00ff)) * u) >> 8);
...
intrgbaColour(int red, int green, int blue, int alpha)
Converts separate RGBA values into a hexadecimal RGBA colour 
return ((blue & 0xFF) << 0) | ((green & 0xFF) << 8) | ((red & 0xFF) << 16) | ((alpha & 0xFF) << 24);
booleanRGBAequals(float[] rgba1, float[] rgba2, float eps)
Checks if two colors differ within supplied epsilon. 
for (int i = 0; i < 3; ++i) {
    if (Math.abs(rgba1[i] - rgba2[2]) > eps) {
        return false;
float a1 = 1;
float a2 = 1;
if (rgba1.length > 3) {
...
StringRGBAFromHEX(String stringValue)
Returns RGBA from a HEX string (# should not be included) 
int r = 0, g = 0, b = 0;
if (stringValue.length() == 3) {
    String sh = stringValue.substring(0, 1);
    r = Integer.parseInt(sh + sh, 16);
    sh = stringValue.substring(1, 2);
    g = Integer.parseInt(sh + sh, 16);
    sh = stringValue.substring(2, 3);
    b = Integer.parseInt(sh + sh, 16);
...