Color problem
lazarus / 13-General

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affect · 2007-12-22 23:45

Hello, i'm writing smth like multiplayer paper racing game (with lnet)
( http://i46.photobucket.com/albums/f137/aff3ct3d/s1.png ) using
lazarus 0.9.24 beta, my os is slackware 12. I can cross-compile
applications for win aswell.
There is some weird color problem on other machines running windows:
color of all players is same, it can be white or some other, but not
the one i need. First i tried to pass it over the network from host to
clients in an array, that didnt work. Then i tried to keep array of
colors on every machine - that didnt help. Then i drew some colored
pixels on my mapfile (png that is loaded in image.picture) and took
colors straight from there (info in memo showed clRed or clBlue, but
when i assigned that color to brush and pen and drew smth - it was
white or grey or something else). I have no idea what else can i do.
That color problem does not exist on other linux machines. Can someone
help?


---
addon:

 image1.Canvas.pen.Color:=clred;
 image1.Canvas.Line(0,0,800,600);

 image1.Canvas.pen.Color:=RGB(255,0,0);
 image1.Canvas.Line(101,101,800,600);   

that gives me 2 red lines in linux, 2 red lines in wine if compiled
for win32 but other guys with win have gray or white or some other
color.

--
addon2
    form1.Canvas.Pen.color:=clred;
  form1.Canvas.Line(0,20,800,200);

    form1.Canvas.Pen.color:=rgb(255,0,0);
  form1.Canvas.Line(0,3,800,100);  

that made lines red on both linux and win, but canvas does not
remember its contents when window is minimized, so i need image,,,

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Marc · 2007-12-27 10:30

only draw in the form canvas in the onpaint event. then it is called
each time the form needs to be painted.

what machines (cpu/os) do the other guys have ?

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affect · 2007-12-27 11:45

other guys have different cpu's and winxp. i sent a small test app
that shows that color problem to Paul_Ishenin, and he said:
Quote
Dec 25 11:42:31 <Paul_Ishenin> morning
Dec 25 11:42:52 <Paul_Ishenin> affect, you've got problems because of
changes before 0.9.24
Dec 25 11:43:18 <Paul_Ishenin> this changes turned on 32bpp bitmaps
under windows
Dec 25 11:43:28 <Paul_Ishenin> with alpha channel
Dec 25 11:44:04 <Paul_Ishenin> but most gdi functions (if not all)
dont understand alpha in color
Dec 25 11:44:32 <affect> hm same thing was with png images
Dec 25 11:44:50 <Paul_Ishenin> as result all drawing done with
transparency - you have not grey lines - you have transparent lines
Dec 25 11:45:08 <affect> oh
Dec 25 11:45:08 * Diogenes-away is now known as Diogenes-Wien
Dec 25 11:45:13 <Paul_Ishenin> they are transparent - so you see color
of window = form
Dec 25 11:45:31 <affect> so what do i have to do?
Dec 25 11:46:30 <Paul_Ishenin> set high color instead of full color in
your desctop settings
Dec 25 11:46:41 <Paul_Ishenin> and wait while giantm fix this issue

changing desktop color settings didnt help
btw here is the screen
http://i46.photobucket.com/albums/f137/aff3ct3d/screens.png