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LabCS infra working

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This commit is contained in:
Artur Adib 2012-02-01 16:04:12 -05:00
parent ff01faa86f
commit 74ec7a4103
1 changed files with 32 additions and 0 deletions
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32
src/colorspace.js
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@ -57,6 +57,8 @@ var ColorSpace = (function ColorSpaceClosure() {
return new AlternateCS(numComps, ColorSpace.fromIR(alt),
PDFFunction.fromIR(tintFnIR));
case 'LabCS':
return new LabCS();
default:
error('Unkown name ' + name);
}
@ -146,6 +148,7 @@ var ColorSpace = (function ColorSpaceClosure() {
var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
return ['AlternateCS', numComps, alt, tintFnIR];
case 'Lab':
return 'LabCS';
default:
error('unimplemented color space object "' + mode + '"');
}
@ -409,3 +412,32 @@ var DeviceCmykCS = (function DeviceCmykCSClosure() {
return DeviceCmykCS;
})();
var LabCS = (function LabCSClosure() {
function LabCS() {
this.name = 'Lab';
this.numComps = 3;
this.defaultColor = [0, 0, 0];
}
LabCS.prototype = {
getRgb: function labcs_getRgb(color) {
return [0, 0, 0];
},
getRgbBuffer: function labcs_getRgbBuffer(input, bits) {
if (bits == 8)
return input;
var scale = 255 / ((1 << bits) - 1);
var i, length = input.length;
var rgbBuf = new Uint8Array(length);
for (i = 0; i < length; ++i)
rgbBuf[i] = 0;
return rgbBuf;
},
isDefaultDecode: function labcs_isDefaultDecode(decodeMap) {
// TODO: not sure about this yet
return true;
}
};
return LabCS;
})();