Class Color
Represents a color in the RGBA color space. This representation is designed for simplicity of conversion to and
from color representations in various languages over compactness. For example, the fields of this representation
can be trivially provided to the constructor of java.awt.Color
in Java; it can also be trivially provided to
UIColor's +colorWithRed:green:blue:alpha
method in iOS; and, with just a little work, it can be easily
formatted into a CSS rgba()
string in JavaScript. This reference page doesn't have information about the
absolute color space that should be used to interpret the RGB value—for example, sRGB, Adobe RGB, DCI-P3, and
BT.2020. By default, applications should assume the sRGB color space. When color equality needs to be decided,
implementations, unless documented otherwise, treat two colors as equal if all their red, green, blue, and alpha
values each differ by at most 1e-5
. Example (Java): import com.google.type.Color; // ... public static
java.awt.Color fromProto(Color protocolor) { float alpha = protocolor.hasAlpha() ?
protocolor.getAlpha().getValue() : 1.0; return new java.awt.Color( protocolor.getRed(), protocolor.getGreen(),
protocolor.getBlue(), alpha); } public static Color toProto(java.awt.Color color) { float red = (float)
color.getRed(); float green = (float) color.getGreen(); float blue = (float) color.getBlue(); float denominator
= 255.0; Color.Builder resultBuilder = Color .newBuilder() .setRed(red / denominator) .setGreen(green /
denominator) .setBlue(blue / denominator); int alpha = color.getAlpha(); if (alpha != 255) { result.setAlpha(
FloatValue .newBuilder() .setValue(((float) alpha) / denominator) .build()); } return resultBuilder.build(); }
// ... Example (iOS / Obj-C): // ... static UIColor* fromProto(Color* protocolor) { float red = [protocolor
red]; float green = [protocolor green]; float blue = [protocolor blue]; FloatValue* alpha_wrapper = [protocolor
alpha]; float alpha = 1.0; if (alpha_wrapper != nil) { alpha = [alpha_wrapper value]; } return [UIColor
colorWithRed:red green:green blue:blue alpha:alpha]; } static Color* toProto(UIColor* color) { CGFloat red,
green, blue, alpha; if (![color getRed:&red green:&green blue:&blue
alpha:&alpha]) { return nil; } Color* result = [[Color alloc] init]; [result setRed:red]; [result
setGreen:green]; [result setBlue:blue]; if (alpha <= 0.9999) { [result
setAlpha:floatWrapperWithValue(alpha)]; } [result autorelease]; return result; } // ... Example (JavaScript): //
... var protoToCssColor = function(rgb_color) { var redFrac = rgb_color.red || 0.0; var greenFrac =
rgb_color.green || 0.0; var blueFrac = rgb_color.blue || 0.0; var red = Math.floor(redFrac * 255); var green =
Math.floor(greenFrac * 255); var blue = Math.floor(blueFrac * 255); if (!('alpha' in rgb_color)) { return
rgbToCssColor(red, green, blue); } var alphaFrac = rgb_color.alpha.value || 0.0; var rgbParams = [red, green,
blue].join(','); return ['rgba(', rgbParams, ',', alphaFrac, ')'].join(''); }; var rgbToCssColor = function(red,
green, blue) { var rgbNumber = new Number((red << 16) | (green << 8) | blue); var
hexString = rgbNumber.toString(16); var missingZeros = 6 - hexString.length; var resultBuilder = ['#']; for (var
i = 0; i < missingZeros; i++) { resultBuilder.push('0'); } resultBuilder.push(hexString); return
resultBuilder.join(''); }; // ...
Implements
Inherited Members
Namespace: Google.Apis.Pollen.v1.Data
Assembly: Google.Apis.Pollen.v1.dll
Syntax
public class Color : IDirectResponseSchema
Properties
Alpha
The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by
the equation: pixel color = alpha * (this color) + (1.0 - alpha) * (background color)
This means that a
value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent
color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish
between a default value and the value being unset. If omitted, this color object is rendered as a solid
color (as if the alpha value had been explicitly given a value of 1.0).
Declaration
[JsonProperty("alpha")]
public virtual float? Alpha { get; set; }
Property Value
Type | Description |
---|---|
float? |
Blue
The amount of blue in the color as a value in the interval [0, 1].
Declaration
[JsonProperty("blue")]
public virtual float? Blue { get; set; }
Property Value
Type | Description |
---|---|
float? |
ETag
The ETag of the item.
Declaration
public virtual string ETag { get; set; }
Property Value
Type | Description |
---|---|
string |
Green
The amount of green in the color as a value in the interval [0, 1].
Declaration
[JsonProperty("green")]
public virtual float? Green { get; set; }
Property Value
Type | Description |
---|---|
float? |
Red
The amount of red in the color as a value in the interval [0, 1].
Declaration
[JsonProperty("red")]
public virtual float? Red { get; set; }
Property Value
Type | Description |
---|---|
float? |