Mail Archives: djgpp/2000/02/12/10:14:02
From: | "Yoda" <cedricbovar AT hotmail DOT com>
|
Newsgroups: | comp.os.msdos.djgpp
|
Subject: | Using a doublebuffer with VESA 2.0
|
Date: | Sat, 12 Feb 2000 15:51:36 +0100
|
Lines: | 26
|
Message-ID: | <883rok$gjq$1@news6.isdnet.net>
|
NNTP-Posting-Host: | 195.154.26.106
|
X-Trace: | news6.isdnet.net 950366804 17018 195.154.26.106 (12 Feb 2000 14:46:44 GMT)
|
X-Complaints-To: | abuse AT isdnet DOT net
|
NNTP-Posting-Date: | 12 Feb 2000 14:46:44 GMT
|
X-Newsreader: | Microsoft Outlook Express 4.72.3110.1
|
X-Mimeole: | Produced By Microsoft MimeOLE V4.72.3110.3
|
To: | djgpp AT delorie DOT com
|
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
|
Reply-To: | djgpp AT delorie DOT com
|
I'd like to use a double buffer . in the djgfx.html , it is written :
unsigned char *videoptr = (unsigned char *)0x0;
short our_global_selector = __dpmi_allocate_ldt_descriptors(1);
__dpmi_set_segment_base_address(our_global_selector, linear_address);
_farpokeb(our_global_selector, videoptr + y*width +x, color);
void copy_buffer2(void)
{
movedata(_my_ds(), doublebuffer, our_global_selector, videoptr,
width*height);
}
I did the same but i get an error at the farpokeb or the movedata.
Actually it works for only 1 pixel !
If i try to copy the whole buffer into the screen it doesnt work.
If i try to farpoke another pixel then (0,0) it also doesnt work.
Can you help me to solve this prbl ? (in linear memory of course)
- Raw text -