phaser/src/renderer/webgl/Utils.js

65 lines
1.6 KiB
JavaScript
Raw Normal View History

2018-02-12 16:01:20 +00:00
/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2018 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
2018-01-09 21:00:56 +00:00
module.exports = {
getTintFromFloats: function (r, g, b, a)
{
var ur = ((r * 255.0)|0) & 0xFF;
var ug = ((g * 255.0)|0) & 0xFF;
var ub = ((b * 255.0)|0) & 0xFF;
var ua = ((a * 255.0)|0) & 0xFF;
2018-01-09 21:00:56 +00:00
2018-01-26 03:55:05 +00:00
return ((ua << 24) | (ur << 16) | (ug << 8) | ub) >>> 0;
},
2018-01-09 21:00:56 +00:00
getTintAppendFloatAlpha: function (rgb, a)
2018-01-26 03:55:05 +00:00
{
var ua = ((a * 255.0)|0) & 0xFF;
return ((ua << 24) | rgb) >>> 0;
},
getTintAppendFloatAlphaAndSwap: function (rgb, a)
{
var ur = ((rgb >> 16)|0) & 0xff;
var ug = ((rgb >> 8)|0) & 0xff;
var ub = (rgb|0) & 0xff;
var ua = ((a * 255.0)|0) & 0xFF;
return ((ua << 24) | (ub << 16) | (ug << 8) | ur) >>> 0;
2018-01-22 22:51:15 +00:00
},
2018-01-30 22:46:43 +00:00
getFloatsFromUintRGB: function (rgb)
{
var ur = ((rgb >> 16)|0) & 0xff;
var ug = ((rgb >> 8)|0) & 0xff;
var ub = (rgb|0) & 0xff;
return [ ur / 255.0, ug / 255.0, ub / 255.0 ];
},
2018-01-22 22:51:15 +00:00
getComponentCount: function (attributes)
{
var count = 0;
for (var index = 0; index < attributes.length; ++index)
{
var element = attributes[index];
if (element.type === WebGLRenderingContext.FLOAT)
{
count += element.size;
}
else
{
count += 1; // We'll force any other type to be 32 bit. for now
}
}
return count;
}
2018-01-09 21:00:56 +00:00
};