problem with TImage
lazarus / 1-Linux

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z4ziggy · 2006-11-11 14:12

Hello everyone,

i finally got lazarus to work, and started making some small program.
alas, once i put a TImage component and setting the Picture property,
trying to compile the program results with the following error :
Code: [Select]Unable to stream Form1:TForm1.
Invalid horizontal pixel index -1
and 3 buttons options : Abort (crashes lazarus), Retry (repeats same
error message) and Ignore (which compiles the program while ignoring
the TImage component...).
Is there a way to fix this?

ps.
ive tried it with several different images - all results with the same
error.

Thanks in advance.

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theo · 2006-11-11 14:41

I have to confirm this. This hasn't been the case in 0.9.18.
After pressing Abort, my computer was completely blocked.
I had to press the reset button.

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Marc · 2006-11-14 09:54

what version if FPC were you using ?

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z4ziggy · 2006-11-14 11:07

fpc 2.0.4

also, after some more checkings, i can confirm the problem with png
images only. bmp works fine.

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z4ziggy · 2006-11-14 19:17

here is the complete debug output im getting on my console (when using
png):
Code: [Select]WARNING: ScaleAndROP  Scaling mask not yet implemented
  Stack trace:
  $081AEF2F
  $081B03DB
  $081B01A9
  $081B4FFB
  $081B4C02
  $081B50E9
  $081B5D55
  $081B17AA
  $081AF1C9
  $0813D684  TBITMAP__WRITESTREAMWITHFPIMAGE,  line 851 of
./include/bitmap.inc
  $081466FE  TFPIMAGEBITMAP__WRITESTREAM,  line 1839 of graphics.pp
  $0813E3C0  TBITMAP__WRITEDATA,  line 1085 of ./include/bitmap.inc
  $0813ACC7  TPICTURE__WRITEDATA,  line 640 of ./include/picture.inc
  $080D49B4
  $080D48FD
  $0813AD29  TPICTURE__DEFINEPROPERTIES,  line 664 of
./include/picture.inc
  $080D525D
GTKWindowStateEventCB :TPromptDialog new_window_state=0 changed_mask=1
GTKWindowStateEventCB :TPromptDialog 0 [RMVDStPr]

it seems weird to me that im using a png but the errors are from
bitmap.inc and TBITMAP_* related - maybe thats the problem?
hth

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Marc · 2006-11-15 10:34

that's not so weird, since for all image operations, the image
internally is converted to a bitmap.

If not already reported in mantis, please bugrep this with a little
example and the failing jpg