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Working version of indexed color space

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sbarman 2011-06-29 10:15:16 -07:00
parent a5be9c4648
commit 08e7b9a858
1 changed files with 67 additions and 7 deletions
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74
pdf.js
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@ -4396,9 +4396,6 @@ var ColorSpace = (function() {
var mode = cs[0].name;
this.mode = mode;
var stream = cs[1];
stream = xref.fetchIfRef(stream);
switch (mode) {
case "DeviceGray":
case "G":
@ -4413,12 +4410,13 @@ var ColorSpace = (function() {
return new DeviceCmykCS();
break;
case "CalGray":
return new DeviceGrayCS(stream);
return new DeviceGrayCS();
break;
case "CalRGB":
return new DeviceRgbCS(stream);
return new DeviceRgbCS();
break;
case "ICCBased":
var stream = xref.fetchIfRef(cs[1]);
var dict = stream.dict;
var numComps = dict.get("N");
if (numComps == 1)
@ -4430,7 +4428,13 @@ var ColorSpace = (function() {
break;
case "Pattern":
return new PatternCS();
break;
case "Indexed":
var base = ColorSpace.parse(cs[1], xref, res);
var hiVal = cs[2];
var lookup = xref.fetchIfRef(cs[3]);
return new IndexedCS(base, hiVal, lookup);
/*return new IndexedCS(stream);
this.stream = stream;
this.dict = stream.dict;
@ -4465,6 +4469,62 @@ var PatternCS = (function() {
return constructor;
})();
var IndexedCS = (function() {
function constructor(base, highVal, lookup) {
this.name = "Indexed";
this.numComps = 1;
this.defaultColor = [0];
this.base = base;
var baseNumComps = base.numComps;
this.highVal = highVal;
var length = baseNumComps * highVal;
var lookupArray = new Uint8Array(length);
if (IsStream(lookup)) {
var bytes = lookup.getBytes(length);
lookupArray.set(bytes);
} else if (IsString(lookup)) {
for (var i = 0; i < length; ++i)
lookupArray[i] = lookup.charCodeAt(i);
} else {
error("Unrecognized lookup table");
}
this.lookup = lookupArray;
}
constructor.prototype = {
getRgb: function graycs_getRgb(color) {
var lookup = this.lookup;
var base = this.base;
var numComps = base.numComps;
var c = [];
for (var i = 0; i < numComps; ++i)
c.push(lookup[i])
return this.base.getRgb(c);
},
getRgbBuffer: function graycs_getRgbBuffer(input) {
var base = this.base;
var numComps = base.numComps;
var lookup = this.lookup;
var length = input.length;
var baseBuf = new Uint8Array(length * numComps);
var baseBufPos = 0;
for (var i = 0; i < length; ++i) {
var lookupPos = input[i];
for (var j = 0; j < numComps ; ++j) {
baseBuf[baseBufPos++] = lookup[lookupPos + j];
}
}
return base.getRgbBuffer(baseBuf);
}
};
return constructor;
})();
var DeviceGrayCS = (function() {
function constructor() {
this.name = "DeviceGray";
@ -4478,7 +4538,7 @@ var DeviceGrayCS = (function() {
return [c, c, c];
},
getRgbBuffer: function graycs_getRgbBuffer(input) {
var length = colorBuf.length;
var length = input.length;
var rgbBuf = new Uint8Array(length);
for (var i = 0, j = 0; i < length; ++i) {
var c = input[i];
@ -4642,7 +4702,7 @@ var PDFImage = (function() {
output[i] = Math.round(255 * ret / ((1 << bpc) - 1));
}
}
return output;
return this.colorSpace.getRbaBuffer(output);
},
getOpacity: function getOpacity() {
var smask = this.smask;