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Ensure that Mesh /Shadings have non-zero width/height (issue 17848)

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This commit is contained in:
Jonas Jenwald 2024-03-29 22:36:02 +01:00
parent 55db43966e
commit 07a8836ab2
5 changed files with 51 additions and 14 deletions
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48
src/core/evaluator.js
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@ -1472,26 +1472,43 @@ class PartialEvaluator {
// Shadings and patterns may be referenced by the same name but the resource
// dictionary could be different so we can't use the name for the cache key.
let id = localShadingPatternCache.get(shading);
if (!id) {
var shadingFill = Pattern.parseShading(
if (id) {
return id;
}
let patternIR;
try {
const shadingFill = Pattern.parseShading(
shading,
this.xref,
resources,
this._pdfFunctionFactory,
localColorSpaceCache
);
const patternIR = shadingFill.getIR();
id = `pattern_${this.idFactory.createObjId()}`;
if (this.parsingType3Font) {
id = `${this.idFactory.getDocId()}_type3_${id}`;
patternIR = shadingFill.getIR();
} catch (reason) {
if (reason instanceof AbortException) {
return null;
}
localShadingPatternCache.set(shading, id);
if (this.options.ignoreErrors) {
warn(`parseShading - ignoring shading: "${reason}".`);
if (this.parsingType3Font) {
this.handler.send("commonobj", [id, "Pattern", patternIR]);
} else {
this.handler.send("obj", [id, this.pageIndex, "Pattern", patternIR]);
localShadingPatternCache.set(shading, null);
return null;
}
throw reason;
}
id = `pattern_${this.idFactory.createObjId()}`;
if (this.parsingType3Font) {
id = `${this.idFactory.getDocId()}_type3_${id}`;
}
localShadingPatternCache.set(shading, id);
if (this.parsingType3Font) {
this.handler.send("commonobj", [id, "Pattern", patternIR]);
} else {
this.handler.send("obj", [id, this.pageIndex, "Pattern", patternIR]);
}
return id;
}
@ -1551,14 +1568,16 @@ class PartialEvaluator {
);
} else if (typeNum === PatternType.SHADING) {
const shading = dict.get("Shading");
const matrix = dict.getArray("Matrix");
const objId = this.parseShading({
shading,
resources,
localColorSpaceCache,
localShadingPatternCache,
});
operatorList.addOp(fn, ["Shading", objId, matrix]);
if (objId) {
const matrix = dict.getArray("Matrix");
operatorList.addOp(fn, ["Shading", objId, matrix]);
}
return undefined;
}
throw new FormatError(`Unknown PatternType: ${typeNum}`);
@ -2109,6 +2128,9 @@ class PartialEvaluator {
localColorSpaceCache,
localShadingPatternCache,
});
if (!patternId) {
continue;
}
args = [patternId];
fn = OPS.shadingFill;
break;