Get rid of `getAll` usage in colorspace.js

For the `CalGray`/`CalRGB`/`Lab` colour spaces, we're currently using `getAll` to retrieve the parameters. However that's not really necessary, since we may just as well explicitly `get` the needed parameters instead.

src/core/colorspace.js

@@ -212,15 +212,15 @@ var ColorSpace = (function ColorSpaceClosure() {
       case 'DeviceCmykCS':
         return this.singletons.cmyk;
       case 'CalGrayCS':
-        whitePoint = IR[1].WhitePoint;
+        whitePoint = IR[1];
-        blackPoint = IR[1].BlackPoint;
+        blackPoint = IR[2];
-        gamma = IR[1].Gamma;
+        gamma = IR[3];
         return new CalGrayCS(whitePoint, blackPoint, gamma);
       case 'CalRGBCS':
-        whitePoint = IR[1].WhitePoint;
+        whitePoint = IR[1];
-        blackPoint = IR[1].BlackPoint;
+        blackPoint = IR[2];
-        gamma = IR[1].Gamma;
+        gamma = IR[3];
-        var matrix = IR[1].Matrix;
+        var matrix = IR[4];
         return new CalRGBCS(whitePoint, blackPoint, gamma, matrix);
       case 'PatternCS':
         var basePatternCS = IR[1];
@@ -241,9 +241,9 @@ var ColorSpace = (function ColorSpaceClosure() {
         return new AlternateCS(numComps, ColorSpace.fromIR(alt),
                                PDFFunction.fromIR(tintFnIR));
       case 'LabCS':
-        whitePoint = IR[1].WhitePoint;
+        whitePoint = IR[1];
-        blackPoint = IR[1].BlackPoint;
+        blackPoint = IR[2];
-        var range = IR[1].Range;
+        var range = IR[3];
         return new LabCS(whitePoint, blackPoint, range);
       default:
         error('Unknown name ' + name);
@@ -287,7 +287,7 @@ var ColorSpace = (function ColorSpaceClosure() {
     } else if (isArray(cs)) {
       mode = xref.fetchIfRef(cs[0]).name;
       this.mode = mode;
-      var numComps, params, alt;
+      var numComps, params, alt, whitePoint, blackPoint, gamma;
 
       switch (mode) {
         case 'DeviceGray':
@@ -300,11 +300,18 @@ var ColorSpace = (function ColorSpaceClosure() {
         case 'CMYK':
           return 'DeviceCmykCS';
         case 'CalGray':
-          params = xref.fetchIfRef(cs[1]).getAll();
+          params = xref.fetchIfRef(cs[1]);
-          return ['CalGrayCS', params];
+          whitePoint = params.get('WhitePoint');
+          blackPoint = params.get('BlackPoint');
+          gamma = params.get('Gamma');
+          return ['CalGrayCS', whitePoint, blackPoint, gamma];
         case 'CalRGB':
-          params = xref.fetchIfRef(cs[1]).getAll();
+          params = xref.fetchIfRef(cs[1]);
-          return ['CalRGBCS', params];
+          whitePoint = params.get('WhitePoint');
+          blackPoint = params.get('BlackPoint');
+          gamma = params.get('Gamma');
+          var matrix = params.get('Matrix');
+          return ['CalRGBCS', whitePoint, blackPoint, gamma, matrix];
         case 'ICCBased':
           var stream = xref.fetchIfRef(cs[1]);
           var dict = stream.dict;
@@ -356,8 +363,11 @@ var ColorSpace = (function ColorSpaceClosure() {
           var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
           return ['AlternateCS', numComps, alt, tintFnIR];
         case 'Lab':
-          params = xref.fetchIfRef(cs[1]).getAll();
+          params = xref.fetchIfRef(cs[1]);
-          return ['LabCS', params];
+          whitePoint = params.get('WhitePoint');
+          blackPoint = params.get('BlackPoint');
+          var range = params.get('Range');
+          return ['LabCS', whitePoint, blackPoint, range];
         default:
           error('unimplemented color space object "' + mode + '"');
       }