Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 472

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 112

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 112

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 112

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 112

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jerdew5/orbworks.com/forum/includes/bbcode.php on line 112
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3368: Cannot modify header information - headers already sent by (output started at /includes/bbcode.php:472)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3370: Cannot modify header information - headers already sent by (output started at /includes/bbcode.php:472)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3371: Cannot modify header information - headers already sent by (output started at /includes/bbcode.php:472)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3372: Cannot modify header information - headers already sent by (output started at /includes/bbcode.php:472)
OrbWorks Community Forum • View topic - Reading Pixels

Reading Pixels

Discuss PocketC for Palm OS (including Desktop Edition)

Postby reguser on Tue Jul 13, 2004 5:33 pm

I would like to take a snapshot of a rectangle on the screen, and store it in a buffer. Is it possible, using the off-screen buffers, or by any other means, to read in the pixels (one by one, or as a larger rectangle) on the screen?
Tom
reguser
 
Posts: 15
Joined: Wed May 01, 2002 1:36 pm
Location: France

Postby FrankG on Tue Jul 13, 2004 6:52 pm

Is a buffer copy the kind of thing you're looking for? It can go from screen buffer to offscreen buffer and vice versa. I haven't played with them much but I suspect saving the buffers might be a trick. Don't know if that can be done but it gets you started, I think.

Frank
FrankG
 
Posts: 210
Joined: Thu Jan 23, 2003 7:58 pm

Postby reguser on Wed Jul 14, 2004 10:23 am

Frank,
Thanks for the reply.
Yes what you mentioned (on screen buffer <--> off screen buffer) would do the trick. But in reading the procedure definitions it seems like I can't copy from the screen ... rather it looks like I have to write directly to the buffer, then 'paste' to the screen.
Tom
reguser
 
Posts: 15
Joined: Wed May 01, 2002 1:36 pm
Location: France

Postby FrankG on Wed Jul 14, 2004 1:43 pm

Tom,

In the language function reference where it discusses the bucopyrect function, it says

"bucopyrect(int sid, int xs, int ys, int w, int h, int did, int xd, int yd, int mode)
- copy the rectangle at (xs,ys) with the given width and height from buffer sid to buffer did (or 0 for screen) "

So to copy from screen to buffer, you can
bucopyrect(0,xscreen,yscreen,w,h, destbuffer,xbuff,ybuff,mode)
since a buffer 0 as the source buffer ID indicates copy from screen.

bucopy works similarly for the whole screen.

Or am I misunderstanding your requirement?

Regards,
Frank
FrankG
 
Posts: 210
Joined: Thu Jan 23, 2003 7:58 pm

Postby reguser on Wed Jul 14, 2004 5:42 pm

Frank,
You are completely right, I never clued into the '0' for screen option. I haven't tried it out yet, but I'll give it a shot.
Thanks for your help!
Tom
reguser
 
Posts: 15
Joined: Wed May 01, 2002 1:36 pm
Location: France


Return to PocketC for Palm OS

Who is online

Users browsing this forum: No registered users and 3 guests

cron