Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/docs/examples/pdf-dejpx.js @ 36:14b91574d44a v1.26.4+2

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+++++ v1.26.4+2
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 22 Sep 2025 11:43:48 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
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1 // Find all JPEG-2000 images and turn them into regular images.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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3 var doc = Document.openDocument(scriptArgs[0]);
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5 function isJPXImage(ref) {
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6 if ("Filter" in ref) {
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7 var filter = ref.Filter;
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8 if (filter == "JPXDecode")
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9 return true;
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10 if (filter.isArray())
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11 for (var i = 0; i < filter.length; ++i)
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12 if (filter[i] == "JPXDecode")
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13 return true;
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14 }
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15 return false;
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16 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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18 var i, n, ref;
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20 var jpxList = {};
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21 var smaskList = {};
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23 // Preload and destroy all JPX images.
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24 n = doc.countObjects();
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25 for (i=1; i < n; ++i) {
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26 ref = doc.newIndirect(i, 0);
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27 if (isJPXImage(ref)) {
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28 print("Loading JPX image:", i)
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29 jpxList[i] = doc.loadImage(ref);
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30 if ("SMask" in ref)
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31 smaskList[i] = ref.SMask;
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32 ref.writeObject(null); // make sure we don't reuse the JPX image resource
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33 }
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34 }
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36 for (i in jpxList) {
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37 ref = doc.newIndirect(i, 0);
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38 var jpx = jpxList[i];
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39 var pix = jpx.toPixmap();
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40 var raw = new Image(pix);
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42 // Create a new image, then copy the data to the old object, then delete it.
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43 print("Decompressed image:", i);
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44 var img = doc.addImage(raw);
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45 if (i in smaskList)
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46 img.SMask = smaskList[i];
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47 ref.writeObject(img.resolve());
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48 ref.writeRawStream(img.readRawStream());
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49 doc.deleteObject(img);
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51 // Invoke the GC to free intermediate pixmaps and images.
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52 gc();
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53 }
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54
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55 doc.save(scriptArgs[1], "compress,garbage=compact");