[Tcl-bugs] [Bug #120874] Image zoom crash

[<no...@so...>]

Bug #120874, was updated on 2000-Oct-31 17:30
Here is a current snapshot of the bug.

Project: Tk Toolkit
Category: Images
Status: Open
Resolution: None
Bug Group: 8.2
Priority: 5
Summary: Image zoom crash

Details: OriginalBugID: 3399 Bug
Version: 8.2
SubmitDate: '1999-11-05'
LastModified: '1999-11-12'
Severity: CRIT
Status: UnAssn
Submitter: techsupp
ChangedBy: hobbs
OS: Windows 98
OSVersion: 4.10.1998


Name:
Bernard Tiddeman

ReproducibleScript:
canvas .c
    pack .c
    image create photo img
    image create photo tmp
    .c create image 0 0 -image img -anchor nw
    tmp read my_image.ppm  # My image is a large image e.g. 1240 by 1765
    img copy img zoom 2 2  # Crashes here!

ObservedBehavior:
WISH82 caused an invalid page fault in
    module TK82.DLL at 015f:004227b1.
    Registers:
    EAX=00000000 CS=015f EIP=004227b1 EFLGS=00010202
    EBX=0071f014 SS=0167 ESP=0071ed94 EBP=0071ed98
    ECX=00000000 DS=0167 ESI=0071f02c FS=19df
    EDX=00529adc ES=0167 EDI=036ebebc GS=0000
    Bytes at CS:EIP:
    89 51 08 8b e5 5d c3 55 8b ec 83 ec 34 8b 45 0c 
    Stack dump:
    00000000 0071eddc 00467fd4 00000000 00529adc 036ebebc 0071f02c 000009b0
    00000dca 0071ee20 00000000 00000000 00000000 0190beb0 0071f014 1000fa8c

DesiredBehavior:
A zoomed image to display





Follow-Ups:

Date: 2000-Nov-22 03:54
By: dkf

Comment:
I'm not sure what the fault actually is, but it could be due to a shortage of memory.  A 1240x1765 photo image requires a *minimum* of 6.26 MB of memory just to store the data (that is assuming 24 bits per pixel; images might actually require more than that.)  Zooming in will require another 25MB or so, and yet more memory is actually consumed as part of making an image visible...
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For detailed info, follow this link:
http://sourceforge.net/bugs/?func=detailbug&bug_id=120874&group_id=12997