我实现了图形生成器并注意到了一些东西-让我们称之为奇怪？
WEB：HSLA-一种颜色标准，其中color pickers 1可用，您甚至可以在html as background颜色上测试这些颜色。
例如：（一种）白色的表示形式： hsla（270，100％，100％，1）
我的图形生成器通过HSLA中的JavaFX模型创建颜色，我注意到颜色（白色）不是我在普通网络HSLA模型中获得的颜色-（Google chrome ）
甚至JavaDoc说：
Color c = Color.web("hsla(270,100%,100%,1.0)");// blue as an hsl web value, explicit alpha
这是怎么了？我会混合一些东西吗？ 这是错误还是功能？
更新：HTML Web HSLA
<!DOCTYPE html>
<html>
<head>
<style>
#p1 {background-color:hsla(0,100%,100%,1);}
#p2 {background-color:hsla(270,100%,100%,1);}
</style>
</head>
<body>
<p>HSL colors with opacity:</p>
<p id="p1">JavaFX red is white in web</p>
<p id="p2">JavaFX blue is white in web</p>
</body>
</html>
这里是演示“功能”的JavaFX示例-请注意，我实现了自定义HSLAColor，它计算了正确的值（也在本应用程序中进行了演示
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class HslaWorld extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Hello HSLA World!");
VBox box = new VBox();
Label red = new Label("JavaFX HSLA red is white in web");
red.setMaxWidth(Double.MAX_VALUE);
red.setStyle("-fx-background-color: " + toHex(Color.web("hsla(0,100%,100%,1.0)")));
Label blue = new Label("JavaFX HSLA blue is white in web");
blue.setMaxWidth(Double.MAX_VALUE);
blue.setStyle("-fx-background-color: " + toHex(Color.web("hsla(270,100%,100%,1.0)")));
box.getChildren().addAll(red, blue);
{
Label redfixed = new Label("Custom HSLA is white in web");
redfixed.setMaxWidth(Double.MAX_VALUE);
redfixed.setStyle("-fx-background-color: " + toHex(new HSLColor(0, 100, 100, 1.0).getColor()));
Label bluefixed = new Label("Custom HSLA is white in web");
bluefixed.setMaxWidth(Double.MAX_VALUE);
bluefixed.setStyle("-fx-background-color: " + toHex(new HSLColor(270, 100, 100, 1.0).getColor()));
box.getChildren().addAll(redfixed, bluefixed);
}
primaryStage.setScene(new Scene(box, 300, 250));
primaryStage.show();
}
private static String toHex(Color c) {
return "#" + Integer.toHexString(c.hashCode());
}
}
import javafx.scene.paint.Color;
/**
* The HSLColor class provides methods to manipulate HSL (Hue, Saturation
* Luminance) values to create a corresponding Color object using the RGB
* ColorSpace.
*
* The HUE is the color, the Saturation is the purity of the color (with respect
* to grey) and Luminance is the brightness of the color (with respect to black
* and white)
*
* The Hue is specified as an angel between 0 - 360 degrees where red is 0,
* green is 120 and blue is 240. In between you have the colors of the rainbow.
* Saturation is specified as a percentage between 0 - 100 where 100 is fully
* saturated and 0 approaches gray. Luminance is specified as a percentage
* between 0 - 100 where 0 is black and 100 is white.
*
* In particular the HSL color space makes it easier change the Tone or Shade of
* a color by adjusting the luminance value.
*/
public class HSLColor {
private Color rgb;
private double[] hsl;
private double alpha;
/**
* Create a HSLColor object using an RGB Color object.
*
* @param rgb
* the RGB Color object
*/
public HSLColor(Color rgb) {
this.rgb = rgb;
hsl = fromRGB(rgb);
alpha = rgb.getOpacity() / 255.0f;
}
/**
* Create a HSLColor object using individual HSL values and a default alpha
* value of 1.0.
*
* @param h
* is the Hue value in degrees between 0 - 360
* @param s
* is the Saturation percentage between 0 - 100
* @param l
* is the Lumanance percentage between 0 - 100
*/
public HSLColor(double h, double s, double l) {
this(h, s, l, 1.0f);
}
/**
* Create a HSLColor object using individual HSL values.
*
* @param h
* the Hue value in degrees between 0 - 360
* @param s
* the Saturation percentage between 0 - 100
* @param l
* the Lumanance percentage between 0 - 100
* @param alpha
* the alpha value between 0 - 1
*/
public HSLColor(double h, double s, double l, double alpha) {
hsl = new double[] { h, s, l };
this.alpha = alpha;
rgb = toRGB(hsl, alpha);
}
/**
* Create a HSLColor object using an an array containing the individual HSL
* values and with a default alpha value of 1.
*
* @param hsl
* array containing HSL values
*/
public HSLColor(double[] hsl) {
this(hsl, 1.0f);
}
/**
* Create a HSLColor object using an an array containing the individual HSL
* values.
*
* @param hsl
* array containing HSL values
* @param alpha
* the alpha value between 0 - 1
*/
public HSLColor(double[] hsl, double alpha) {
this.hsl = hsl;
this.alpha = alpha;
rgb = toRGB(hsl, alpha);
}
/**
* Create a RGB Color object based on this HSLColor with a different Hue
* value. The degrees specified is an absolute value.
*
* @param degrees
* - the Hue value between 0 - 360
* @return the RGB Color object
*/
public Color adjustHue(double degrees) {
return toRGB(degrees, hsl[1], hsl[2], alpha);
}
/**
* Create a RGB Color object based on this HSLColor with a different
* Luminance value. The percent specified is an absolute value.
*
* @param percent
* - the Luminance value between 0 - 100
* @return the RGB Color object
*/
public Color adjustLuminance(double percent) {
return toRGB(hsl[0], hsl[1], percent, alpha);
}
/**
* Create a RGB Color object based on this HSLColor with a different
* Saturation value. The percent specified is an absolute value.
*
* @param percent
* - the Saturation value between 0 - 100
* @return the RGB Color object
*/
public Color adjustSaturation(double percent) {
return toRGB(hsl[0], percent, hsl[2], alpha);
}
/**
* Create a RGB Color object based on this HSLColor with a different Shade.
* Changing the shade will return a darker color. The percent specified is a
* relative value.
*
* @param percent
* - the value between 0 - 100
* @return the RGB Color object
*/
public Color adjustShade(double percent) {
double multiplier = (100.0f - percent) / 100.0f;
double l = Math.max(0.0f, hsl[2] * multiplier);
return toRGB(hsl[0], hsl[1], l, alpha);
}
/**
* Create a RGB Color object based on this HSLColor with a different Tone.
* Changing the tone will return a lighter color. The percent specified is a
* relative value.
*
* @param percent
* - the value between 0 - 100
* @return the RGB Color object
*/
public Color adjustTone(double percent) {
double multiplier = (100.0f + percent) / 100.0f;
double l = Math.min(100.0f, hsl[2] * multiplier);
return toRGB(hsl[0], hsl[1], l, alpha);
}
/**
* Get the Alpha value.
*
* @return the Alpha value.
*/
public double getAlpha() {
return alpha;
}
/**
* Create a RGB Color object that is the complementary color of this
* HSLColor. This is a convenience method. The complementary color is
* determined by adding 180 degrees to the Hue value.
*
* @return the RGB Color object
*/
public Color getComplementary() {
double hue = (hsl[0] + 180.0f) % 360.0f;
return toRGB(hue, hsl[1], hsl[2]);
}
/**
* Get the Hue value.
*
* @return the Hue value.
*/
public double getHue() {
return hsl[0];
}
/**
* Get the HSL values.
*
* @return the HSL values.
*/
public double[] getHSL() {
return hsl;
}
/**
* Get the Luminance value.
*
* @return the Luminance value.
*/
public double getLuminance() {
return hsl[2];
}
/**
* Get the RGB Color object represented by this HDLColor.
*
* @return the RGB Color object.
*/
public Color getColor() {
return rgb;
}
/**
* Get the Saturation value.
*
* @return the Saturation value.
*/
public double getSaturation() {
return hsl[1];
}
public String toString() {
String toString = "HSLColor[h=" + hsl[0] + ",s=" + hsl[1] + ",l=" + hsl[2] + ",alpha=" + alpha + "]";
return toString;
}
/**
* Convert a RGB Color to it corresponding HSL values.
*
* @return an array containing the 3 HSL values.
*/
public static double[] fromRGB(Color color) {
// Get RGB values in the range 0 - 1
// double[] rgb = new double[]{};
double r = color.getRed();
double g = color.getGreen();
double b = color.getBlue();
// Minimum and Maximum RGB values are used in the HSL calculations
double min = Math.min(r, Math.min(g, b));
double max = Math.max(r, Math.max(g, b));
// Calculate the Hue
double h = 0.0;
if (max == min)
h = 0.0;
else if (max == r)
h = ((60.0 * (g - b) / (max - min)) + 360.0) % 360.0;
else if (max == g)
h = (60.0 * (b - r) / (max - min)) + 120.0;
else if (max == b)
h = (60.0 * (r - g) / (max - min)) + 240.0;
// Calculate the Luminance
double l = (max + min) / 2.0;
// Calculate the Saturation
double s = 0;
if (max == min)
s = 0;
else if (l <= .5f)
s = (max - min) / (max + min);
else
s = (max - min) / (2 - max - min);
return new double[] { h, s * 100, l * 100 };
}
/**
* Convert HSL values to a RGB Color with a default alpha value of 1. H
* (Hue) is specified as degrees in the range 0 - 360. S (Saturation) is
* specified as a percentage in the range 1 - 100. L (Lumanance) is
* specified as a percentage in the range 1 - 100.
*
* @param hsl
* an array containing the 3 HSL values
*
* @returns the RGB Color object
*/
public static Color toRGB(double[] hsl) {
return toRGB(hsl, 1.0f);
}
/**
* Convert HSL values to a RGB Color. H (Hue) is specified as degrees in the
* range 0 - 360. S (Saturation) is specified as a percentage in the range 1
* - 100. L (Lumanance) is specified as a percentage in the range 1 - 100.
*
* @param hsl
* an array containing the 3 HSL values
* @param alpha
* the alpha value between 0 - 1
*
* @returns the RGB Color object
*/
public static Color toRGB(double[] hsl, double alpha) {
return toRGB(hsl[0], hsl[1], hsl[2], alpha);
}
/**
* Convert HSL values to a RGB Color with a default alpha value of 1.
*
* @param h
* Hue is specified as degrees in the range 0 - 360.
* @param s
* Saturation is specified as a percentage in the range 1 - 100.
* @param l
* Lumanance is specified as a percentage in the range 1 - 100.
*
* @returns the RGB Color object
*/
public static Color toRGB(double h, double s, double l) {
return toRGB(h, s, l, 1.0f);
}
/**
* Convert HSL values to a RGB Color.
*
* @param h
* Hue is specified as degrees in the range 0 - 360.
* @param s
* Saturation is specified as a percentage in the range 1 - 100.
* @param l
* Lumanance is specified as a percentage in the range 1 - 100.
* @param alpha
* the alpha value between 0 - 1
*
* @returns the RGB Color object
*/
public static Color toRGB(double h, double s, double l, double alpha) {
if (s < 0.0f || s > 100.0f) {
String message = "Color parameter outside of expected range - Saturation";
throw new IllegalArgumentException(message);
}
if (l < 0.0f || l > 100.0f) {
String message = "Color parameter outside of expected range - Luminance";
throw new IllegalArgumentException(message);
}
if (alpha < 0.0f || alpha > 1.0f) {
String message = "Color parameter outside of expected range - Alpha";
throw new IllegalArgumentException(message);
}
// Formula needs all values between 0 - 1.
h = h % 360.0f;
h /= 360f;
s /= 100f;
l /= 100f;
double q = 0;
if (l < 0.5)
q = l * (1 + s);
else
q = (l + s) - (s * l);
double p = 2 * l - q;
double r = Math.max(0, HueToRGB(p, q, h + (1.0f / 3.0f)));
double g = Math.max(0, HueToRGB(p, q, h));
double b = Math.max(0, HueToRGB(p, q, h - (1.0f / 3.0f)));
r = Math.min(r, 1.0f);
g = Math.min(g, 1.0f);
b = Math.min(b, 1.0f);
return new Color(r, g, b, alpha);
}
private static double HueToRGB(double p, double q, double h) {
if (h < 0)
h += 1;
if (h > 1)
h -= 1;
if (6 * h < 1) {
return p + ((q - p) * 6 * h);
}
if (2 * h < 1) {
return q;
}
if (3 * h < 2) {
return p + ((q - p) * 6 * ((2.0f / 3.0f) - h));
}
return p;
}
}
“解决方案”是自定义转换，如上所述：
似乎Java实际上是解析为HSV而不是文档和方法名称中所述的Web HSL。
答案 0 :(得分：0)
这似乎是命名混乱。它在文档中指出，这两个显然不是等价的：
<块引用>Color.web("hsl(240,100%,100%)");
Color.hsb(240.0, 1.0, 1.0, 1.0)