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SMask emulation

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This commit is contained in:
Yury Delendik 2014-01-23 11:13:32 -06:00
parent ac91047f6d
commit 4054b0c385
2 changed files with 183 additions and 15 deletions
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38
src/core/evaluator.js
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@ -96,7 +96,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
var groupOptions = {
matrix: matrix,
bbox: bbox,
smask: !!smask,
smask: smask,
isolated: false,
knockout: false
};
@ -105,8 +105,9 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
if (isName(groupSubtype) && groupSubtype.name === 'Transparency') {
groupOptions.isolated = group.get('I') || false;
groupOptions.knockout = group.get('K') || false;
// There is also a group colorspace, but since we put everything in
// RGB I'm not sure we need it.
var colorSpace = group.get('CS');
groupOptions.colorSpace = colorSpace ?
ColorSpace.parseToIR(colorSpace, this.xref, resources) : null;
}
operatorList.addOp(OPS.beginGroup, [groupOptions]);
}
@ -196,6 +197,18 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
operatorList.addOp(OPS.paintImageXObject, args);
},
handleSMask: function PartialEvaluator_handleSmask(smask, resources,
operatorList) {
var smaskContent = smask.get('G');
var smaskOptions = {
subtype: smask.get('S').name,
backdrop: smask.get('BC')
};
this.buildFormXObject(resources, smaskContent, smaskOptions,
operatorList);
},
handleTilingType: function PartialEvaluator_handleTilingType(
fn, args, resources, pattern, patternDict,
operatorList) {
@ -265,7 +278,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
},
setGState: function PartialEvaluator_setGState(resources, gState,
operatorList) {
operatorList, xref) {
var self = this;
// TODO(mack): This should be rewritten so that this function returns
@ -295,9 +308,18 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
gStateObj.push([key, value]);
break;
case 'SMask':
// We support the default so don't trigger a warning bar.
if (!isName(value) || value.name != 'None')
UnsupportedManager.notify(UNSUPPORTED_FEATURES.smask);
if (isName(value) && value.name === 'None') {
gStateObj.push([key, false]);
break;
}
var dict = xref.fetchIfRef(value);
if (isDict(dict)) {
self.handleSMask(dict, resources, operatorList);
gStateObj.push([key, true]);
} else {
warn('Unsupported SMask type');
}
break;
// Only generate info log messages for the following since
// they are unlikey to have a big impact on the rendering.
@ -579,7 +601,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
break;
var gState = extGState.get(dictName.name);
self.setGState(resources, gState, operatorList);
self.setGState(resources, gState, operatorList, xref);
args = [];
continue;
} // switch