16 lines
629 B
JavaScript
16 lines
629 B
JavaScript
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// Adds any extra JS functions/helpers we want to CanvasKit.
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// Wrapped in a function to avoid leaking global variables.
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(function(CanvasKit){
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function clamp(c) {
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return Math.round(Math.max(0, Math.min(c || 0, 255)));
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}
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// Colors are just a 32 bit number with 8 bits each of a, r, g, b
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// The API is the same as CSS's representation of color rgba(), that is
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// r,g,b are 0-255, and a is 0.0 to 1.0.
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CanvasKit.Color = function(r, g, b, a) {
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return (clamp(a*255) << 24) | (clamp(r) << 16) | (clamp(g) << 8) | (clamp(b) << 0);
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}
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}(Module)); // When this file is loaded in, the high level object is "Module";
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