PDF Viewer: Out of Memory when openning PDF-1.0 file

roytam1 commented 7 months ago

Sample PDF: W.zip

mgroeber9110 commented 2 months ago

A few observations on memory usage for this particular file:

One large moveable block referenced by xref->entries (44352 bytes) - this is already making life quite difficult for the heap manager of GEOS
There are a lot of GfxFont structures allocated: 1856 fixed per font, 220 fonts - this alone would make over 400k
The stream_TEXT resource is 47664 bytes in size (EC build, NC would be a bit less) - this seems to be what eventually causes the failure (while initializing the fonts), because it will not fit into a fragmented heap at some point

The latter issue appears to be caused by #pragma codeseg (Borland C) not having been replaced by #pragma code_seg() (Watcom) in the PDF Viewer.

roytam1 commented 2 days ago

The latter issue appears to be caused by #pragma codeseg (Borland C) not having been replaced by #pragma code_seg() (Watcom) in the PDF Viewer.

tried latest CI NC build with that file, and it seems that problem persists.

bluewaysw / pcgeos