| From: | |
| Date: | 16 Feb 2001 at 18:32:34 |
| Subject: | Screens and IDCMP |
Hello,
I'm doing some experiments with the iff.library to open a iff file on a
screen the screen.
Now i have some questions, would be nice if someone could help me with this
ones:
* I wanted to add something so the user could close the app. I started with
some messageloop, that i copied from some sources. But then i found out,
they where meant for windows, then i searched the Screen-struct and i
didn't find the UserPort. Problemo :). So the q. is: can you make a screen
work with IDCMP? And how to do it.
I was thinking to add a window to it that's as big as the screen and render
the pic to the Window's Rastport. Or maybe open a very little one you
couldn't see???
* My solution now to do this: if(!(*(UBYTE *)0xbfe001 & 0x40)) // Check
leftmouse
done = TRUE;
I found this in some old source, it also mentioned that it was a really
nasty way of doing :) So probably i shouldn't use. But can someone explain
me how it works and how has someone found out that it works? It does
directly something with the interrupts or what?
* The pic i'm trying to display is a 320x200x8 ilbm. Now i open a screen a
screen using SA_DisplayID, 0x00021000. This is the PAL-Lowres ID (this one
is 320x256x8), but i also use CGFX and want to make the program work on my
CV3D. I found out that the DisplayID for a 320x240x8 CGFX screen would be
0x40d2000. I tried this one but i doesn't work, only a black screen that
quits when i click with my lefty.... Do i need to do something special when
working with CGFX?
* When you open a a Screen using DisplayID, do you still need to give the
Width and Height params to the Screen struct and if so, why? I thaught that
the DisplayID contained all that info???
Sorry for my bad English and the lot of questions, I just started again
doing some programming on the AmigaOS.
Joris Kempen - webmaster
visit www.detrekkers.com
Politicians should read science fiction, not westerns and detective
stories.
-- Arthur C. Clarke
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