NetNews Usenet Archive 1992 #16/NN_1992_16.iso/spool/comp/windows/ms/programm/7290

Text File | 1992-07-21 | 1.6 KB | 35 lines

Newsgroups: comp.windows.ms.programmer
Path: sparky!uunet!sun-barr!cs.utexas.edu!wotan.compaq.com!twisto.eng.hou.compaq.com!sword.eng.hou.compaq.com!mccreary
From: [e-mail] (Ed McCreary)
Subject: Re: Diplaying BMP files under Windows 3.x
Message-ID: <[e-mail]>
Sender: [e-mail] (Netnews Account)
Organization: Compaq Computer Corp.
References: <[e-mail]>
Date: Tue, 21 Jul 1992 18:04:39 GMT
Lines: 23

In article <[e-mail]> [e-mail] (Stefan Schemat) writes:
>Does anybody knows how to load and display a BMP file with 256
>colors under Windows 3.x?
>First we have tried to display that bitmap with the GDI-command
>"BitBlt()" after including it in the program's ressources. It
>appeared very fast, but only with a few colors.
>Then we loaded and displayed it pixel by pixel with "SetPixel()".
>This method shows all colors, but it is veeeeeery sloooooow.
>Ciao Stefan
>[e-mail]

I assume you have a video card capable of suporting 256 colors.  If so,
you need to create a logical palette based upon the colors needed in the
image, select it into the device context and realize it before displaying.
If your using the SDK, there's a section on logical palettes in one
of the volumes.  It's the programmer's guide I believe.

Remember to realized the palette just before creating the bitmap also.

--
[e-mail]     Computers are like Old Testament gods;
Me? Speak for Compaq?  Yeah, right.   lots of rules and no mercy.
"By this time my lungs were aching for air..."               Joseph Campbell