Fully end to end encrypted anonymous chat program. Server only stores public key lookup for users and the encrypted messages. No credentials are transfered to the server, but kept in local browser storage. This allows 100% safe chatting.
https://safechat.ch
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37 lines
896 B
37 lines
896 B
var utils = require('../utils') |
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, nodes = require('../nodes'); |
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/** |
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* Blend the `top` color over the `bottom` |
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* |
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* Examples: |
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* |
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* blend(rgba(#FFF, 0.5), #000) |
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* // => #808080 |
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* |
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* blend(rgba(#FFDE00,.42), #19C261) |
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* // => #7ace38 |
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* |
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* blend(rgba(lime, 0.5), rgba(red, 0.25)) |
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* // => rgba(128,128,0,0.625) |
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* |
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* @param {RGBA|HSLA} top |
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* @param {RGBA|HSLA} [bottom=#fff] |
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* @return {RGBA} |
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* @api public |
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*/ |
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module.exports = function blend(top, bottom){ |
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// TODO: different blend modes like overlay etc. |
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utils.assertColor(top); |
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top = top.rgba; |
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bottom = bottom || new nodes.RGBA(255, 255, 255, 1); |
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utils.assertColor(bottom); |
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bottom = bottom.rgba; |
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return new nodes.RGBA( |
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top.r * top.a + bottom.r * (1 - top.a), |
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top.g * top.a + bottom.g * (1 - top.a), |
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top.b * top.a + bottom.b * (1 - top.a), |
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top.a + bottom.a - top.a * bottom.a); |
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};
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