/
PixelDatatype.js
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/
PixelDatatype.js
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import WebGLConstants from "../Core/WebGLConstants.js";
/**
* The data type of a pixel.
*
* @enum {Number}
* @see PostProcessStage
*/
var PixelDatatype = {
UNSIGNED_BYTE: WebGLConstants.UNSIGNED_BYTE,
UNSIGNED_SHORT: WebGLConstants.UNSIGNED_SHORT,
UNSIGNED_INT: WebGLConstants.UNSIGNED_INT,
FLOAT: WebGLConstants.FLOAT,
HALF_FLOAT: WebGLConstants.HALF_FLOAT_OES,
UNSIGNED_INT_24_8: WebGLConstants.UNSIGNED_INT_24_8,
UNSIGNED_SHORT_4_4_4_4: WebGLConstants.UNSIGNED_SHORT_4_4_4_4,
UNSIGNED_SHORT_5_5_5_1: WebGLConstants.UNSIGNED_SHORT_5_5_5_1,
UNSIGNED_SHORT_5_6_5: WebGLConstants.UNSIGNED_SHORT_5_6_5,
};
/**
@private
*/
PixelDatatype.toWebGLConstant = function (pixelDatatype, context) {
switch (pixelDatatype) {
case PixelDatatype.UNSIGNED_BYTE:
return WebGLConstants.UNSIGNED_BYTE;
case PixelDatatype.UNSIGNED_SHORT:
return WebGLConstants.UNSIGNED_SHORT;
case PixelDatatype.UNSIGNED_INT:
return WebGLConstants.UNSIGNED_INT;
case PixelDatatype.FLOAT:
return WebGLConstants.FLOAT;
case PixelDatatype.HALF_FLOAT:
return context.webgl2
? WebGLConstants.HALF_FLOAT
: WebGLConstants.HALF_FLOAT_OES;
case PixelDatatype.UNSIGNED_INT_24_8:
return WebGLConstants.UNSIGNED_INT_24_8;
case PixelDatatype.UNSIGNED_SHORT_4_4_4_4:
return WebGLConstants.UNSIGNED_SHORT_4_4_4_4;
case PixelDatatype.UNSIGNED_SHORT_5_5_5_1:
return WebGLConstants.UNSIGNED_SHORT_5_5_5_1;
case PixelDatatype.UNSIGNED_SHORT_5_6_5:
return PixelDatatype.UNSIGNED_SHORT_5_6_5;
}
};
/**
@private
*/
PixelDatatype.isPacked = function (pixelDatatype) {
return (
pixelDatatype === PixelDatatype.UNSIGNED_INT_24_8 ||
pixelDatatype === PixelDatatype.UNSIGNED_SHORT_4_4_4_4 ||
pixelDatatype === PixelDatatype.UNSIGNED_SHORT_5_5_5_1 ||
pixelDatatype === PixelDatatype.UNSIGNED_SHORT_5_6_5
);
};
/**
@private
*/
PixelDatatype.sizeInBytes = function (pixelDatatype) {
switch (pixelDatatype) {
case PixelDatatype.UNSIGNED_BYTE:
return 1;
case PixelDatatype.UNSIGNED_SHORT:
case PixelDatatype.UNSIGNED_SHORT_4_4_4_4:
case PixelDatatype.UNSIGNED_SHORT_5_5_5_1:
case PixelDatatype.UNSIGNED_SHORT_5_6_5:
case PixelDatatype.HALF_FLOAT:
return 2;
case PixelDatatype.UNSIGNED_INT:
case PixelDatatype.FLOAT:
case PixelDatatype.UNSIGNED_INT_24_8:
return 4;
}
};
/**
@private
*/
PixelDatatype.validate = function (pixelDatatype) {
return (
pixelDatatype === PixelDatatype.UNSIGNED_BYTE ||
pixelDatatype === PixelDatatype.UNSIGNED_SHORT ||
pixelDatatype === PixelDatatype.UNSIGNED_INT ||
pixelDatatype === PixelDatatype.FLOAT ||
pixelDatatype === PixelDatatype.HALF_FLOAT ||
pixelDatatype === PixelDatatype.UNSIGNED_INT_24_8 ||
pixelDatatype === PixelDatatype.UNSIGNED_SHORT_4_4_4_4 ||
pixelDatatype === PixelDatatype.UNSIGNED_SHORT_5_5_5_1 ||
pixelDatatype === PixelDatatype.UNSIGNED_SHORT_5_6_5
);
};
export default Object.freeze(PixelDatatype);