Merge pull request #20570 from calixteman/no_contents_image_stream

Don't use contents stream which have an image format

Author: timvandermeij

src/core/base_stream.js

@@ -68,6 +68,10 @@ class BaseStream {
     return false;
   }
 
+  get isImageStream() {
+    return false;
+  }
+
   get canAsyncDecodeImageFromBuffer() {
     return false;
   }

src/core/ccitt_stream.js

@@ -55,6 +55,10 @@ class CCITTFaxStream extends DecodeStream {
       this.buffer[this.bufferLength++] = c;
     }
   }
+
+  get isImageStream() {
+    return true;
+  }
 }
 
 export { CCITTFaxStream };

src/core/decode_stream.js

@@ -148,7 +148,7 @@ class DecodeStream extends BaseStream {
 
 class StreamsSequenceStream extends DecodeStream {
   constructor(streams, onError = null) {
-    streams = streams.filter(s => s instanceof BaseStream);
+    streams = streams.filter(s => s instanceof BaseStream && !s.isImageStream);
 
     let maybeLength = 0;
     for (const stream of streams) {

src/core/document.js

@@ -270,7 +270,7 @@ class Page {
   async getContentStream() {
     const content = await this.pdfManager.ensure(this, "content");
 
-    if (content instanceof BaseStream) {
+    if (content instanceof BaseStream && !content.isImageStream) {
       return content;
     }
     if (Array.isArray(content)) {

src/core/jbig2_stream.js

@@ -52,6 +52,10 @@ class Jbig2Stream extends DecodeStream {
     return true;
   }
 
+  get isImageStream() {
+    return true;
+  }
+
   async decodeImage(bytes, _decoderOptions) {
     if (this.eof) {
       return this.buffer;

src/core/jpeg_stream.js

@@ -194,6 +194,10 @@ class JpegStream extends DecodeStream {
       decoder?.close();
     }
   }
+
+  get isImageStream() {
+    return true;
+  }
 }
 
 export { JpegStream };

src/core/jpx_stream.js

@@ -64,6 +64,10 @@ class JpxStream extends DecodeStream {
   get canAsyncDecodeImageFromBuffer() {
     return this.stream.isAsync;
   }
+
+  get isImageStream() {
+    return true;
+  }
 }
 
 export { JpxStream };

test/pdfs/.gitignore

@@ -866,3 +866,4 @@
 !bitmap-trailing-7fff-stripped-harder.pdf
 !bitmap-trailing-7fff-stripped.pdf
 !bitmap.pdf
+!bomb_giant.pdf

test/pdfs/bomb_giant.pdf

@@ -13922,5 +13922,12 @@
     "rounds": 1,
     "type": "eq",
     "useWasm": false
+  },
+  {
+    "id": "bomb_giant_contents_image_stream",
+    "file": "pdfs/bomb_giant.pdf",
+    "md5": "e515a9abb11ab74332e57e371bfae61e",
+    "rounds": 1,
+    "type": "eq"
   }
 ]