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Fallback to the |Dummy| Pattern when we fail to parse a Shading Pattern (issue 5509)

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This commit is contained in:
Jonas Jenwald 2014-11-30 21:15:18 +01:00
parent dc5961d969
commit 78d0d269dc
3 changed files with 33 additions and 14 deletions
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37
src/core/pattern.js
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@ -15,7 +15,8 @@
* limitations under the License.
*/
/* globals ColorSpace, PDFFunction, Util, error, warn, info, isArray, isStream,
assert, isPDFFunction, UnsupportedManager, UNSUPPORTED_FEATURES */
assert, isPDFFunction, UnsupportedManager, UNSUPPORTED_FEATURES,
MissingDataException */
'use strict';
@ -49,19 +50,27 @@ var Pattern = (function PatternClosure() {
var dict = isStream(shading) ? shading.dict : shading;
var type = dict.get('ShadingType');
switch (type) {
case PatternType.AXIAL:
case PatternType.RADIAL:
// Both radial and axial shadings are handled by RadialAxial shading.
return new Shadings.RadialAxial(dict, matrix, xref, res);
case PatternType.FREE_FORM_MESH:
case PatternType.LATTICE_FORM_MESH:
case PatternType.COONS_PATCH_MESH:
case PatternType.TENSOR_PATCH_MESH:
return new Shadings.Mesh(shading, matrix, xref, res);
default:
UnsupportedManager.notify(UNSUPPORTED_FEATURES.shadingPattern);
return new Shadings.Dummy();
try {
switch (type) {
case PatternType.AXIAL:
case PatternType.RADIAL:
// Both radial and axial shadings are handled by RadialAxial shading.
return new Shadings.RadialAxial(dict, matrix, xref, res);
case PatternType.FREE_FORM_MESH:
case PatternType.LATTICE_FORM_MESH:
case PatternType.COONS_PATCH_MESH:
case PatternType.TENSOR_PATCH_MESH:
return new Shadings.Mesh(shading, matrix, xref, res);
default:
throw new Error('Unknown PatternType: ' + type);
}
} catch (ex) {
if (ex instanceof MissingDataException) {
throw ex;
}
UnsupportedManager.notify(UNSUPPORTED_FEATURES.shadingPattern);
warn(ex);
return new Shadings.Dummy();
}
};
return Pattern;