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moved rgbToHex correct implementation to pskl core utils

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This commit is contained in:
juliandescottes 2014-09-24 21:53:41 +02:00
parent b5465ca066
commit 6583d3d560
2 changed files with 19 additions and 27 deletions
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23
src/js/utils/FrameUtils.js
View File

@ -68,34 +68,13 @@
if (a < 125) {
grid[x][y] = Constants.TRANSPARENT_COLOR;
} else {
grid[x][y] = pskl.utils.FrameUtils.rgbToHex_(r,g,b);
grid[x][y] = pskl.utils.rgbToHex(r,g,b);
}
}
}
return pskl.model.Frame.fromPixelGrid(grid);
},
/**
* Convert a rgb(Number, Number, Number) color to hexadecimal representation
* @param {Number} r red value, between 0 and 255
* @param {Number} g green value, between 0 and 255
* @param {Number} b blue value, between 0 and 255
* @return {String} hex representation of the color '#ABCDEF'
*/
rgbToHex_ : function (r, g, b) {
return "#" + this.componentToHex_(r) + this.componentToHex_(g) + this.componentToHex_(b);
},
/**
* Convert a color component (as a Number between 0 and 255) to its string hexa representation
* @param {Number} c component value, between 0 and 255
* @return {String} eg. '0A'
*/
componentToHex_ : function (c) {
var hex = c.toString(16);
return hex.length == 1 ? "0" + hex : hex;
},
/**
* Alpha compositing using porter duff algorithm :
* http://en.wikipedia.org/wiki/Alpha_compositing

23
src/js/utils/core.js
View File

@ -46,12 +46,25 @@ if (!Function.prototype.bind) {
var ns = $.namespace("pskl.utils");
ns.rgbToHex = function(r, g, b) {
if (r > 255 || g > 255 || b > 255) {
throw "Invalid color component";
}
/**
* Convert a rgb(Number, Number, Number) color to hexadecimal representation
* @param {Number} r red value, between 0 and 255
* @param {Number} g green value, between 0 and 255
* @param {Number} b blue value, between 0 and 255
* @return {String} hex representation of the color '#ABCDEF'
*/
ns.rgbToHex = function (r, g, b) {
return "#" + pskl.utils.componentToHex(r) + pskl.utils.componentToHex(g) + pskl.utils.componentToHex(b);
};
return ((r << 16) | (g << 8) | b).toString(16);
/**
* Convert a color component (as a Number between 0 and 255) to its string hexa representation
* @param {Number} c component value, between 0 and 255
* @return {String} eg. '0A'
*/
ns.componentToHex = function (c) {
var hex = c.toString(16);
return hex.length == 1 ? "0" + hex : hex;
};
ns.normalize = function (value, def) {