[gs-bugs] [Bug 691496] New: How to reduce image size?

bugzilla-daemon at ghostscript.com bugzilla-daemon at ghostscript.com
Sat Jul 24 23:16:40 UTC 2010


http://bugs.ghostscript.com/show_bug.cgi?id=691496

           Summary: How to reduce image size?
           Product: MuPDF
           Version: unspecified
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P4
         Component: mupdf
        AssignedTo: tor.andersson at artifex.com
        ReportedBy: akay at 21cn.com
         QAContact: gs-bugs at ghostscript.com
   Estimated Hours: 0.0


Hi,I don't know where to ask question,so I posted it as a bug,sorry.

When use mupdf to read the large image,it will use a lot of memory.
I want to reduce the image size to reduce the memory use.
How to do?

In the pdf_interpret.c

            else if (!strcmp(fz_toname(subtype), "Image"))
            {
                if ((csi->dev->hints & FZ_IGNOREIMAGE) == 0)
                {
                    pdf_image *img;
                    error = pdf_loadimage(&img, csi->xref, rdb, obj);
                    if (error)
                        return fz_rethrow(error, "cannot load image (%d %d R)",
fz_tonum(obj), fz_togen(obj));
                    pdf_showimage(csi, img);
                    pdf_dropimage(img);
                }
            }

After pdf_loadimage,and before pdf_showimage,I want to add some code to reduce
the image size,Can you tell me how to do?

Thank you very much.

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