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Transfer image masks when when possible, instead of copying.

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This commit is contained in:
Nicholas Nethercote 2014-03-06 21:27:32 -08:00
parent cb5bb0cec7
commit 00c1cff405
2 changed files with 23 additions and 15 deletions
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12
src/core/evaluator.js
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@ -14,10 +14,10 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals assert, assertWellFormed, ColorSpace, Dict, Encodings, error,
ErrorFont, Font, FONT_IDENTITY_MATRIX, fontCharsToUnicode, FontFlags,
ImageKind, info, isArray, isCmd, isDict, isEOF, isName, isNum,
isStream, isString, JpegStream, Lexer, Metrics, Name, Parser,
/* globals assert, assertWellFormed, ColorSpace, DecodeStream, Dict, Encodings,
error, ErrorFont, Font, FONT_IDENTITY_MATRIX, fontCharsToUnicode,
FontFlags, ImageKind, info, isArray, isCmd, isDict, isEOF, isName,
isNum, isStream, isString, JpegStream, Lexer, Metrics, Name, Parser,
Pattern, PDFImage, PDFJS, serifFonts, stdFontMap, symbolsFonts,
getTilingPatternIR, warn, Util, Promise, LegacyPromise,
RefSetCache, isRef, TextRenderingMode, CMapFactory, OPS,
@ -146,10 +146,12 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
var bitStrideLength = (width + 7) >> 3;
var imgArray = image.getBytes(bitStrideLength * height);
var decode = dict.get('Decode', 'D');
var canTransfer = image instanceof DecodeStream;
var inverseDecode = !!decode && decode[0] > 0;
operatorList.addOp(OPS.paintImageMaskXObject,
[PDFImage.createMask(imgArray, width, height, inverseDecode)]
[PDFImage.createMask(imgArray, width, height, canTransfer,
inverseDecode)]
);
return;
}