OpenEuphoria

Re: Graphics in Win32lib

• Posted by mistertrik at hotmail.com Oct 10, 2002
• 467 views

Thank you, that worked fine.


>From: tone.skoda at gmx.net
>Subject: Re: Graphics in Win32lib
>
>
>----- Original Message -----
>From: <mistertrik at hotmail.com>
>
> > When it is resized smaller, dark bands appear in the
> > middle of the section.
>
>Hi,
>
>I have solution for you. You have to use SetStretchBltMode on destination 
>dc
>before painting your bitmap onto it with HALFTONE parameter.
>
>add this code to Matrin's stretch.exw:
>
>-- 1. Definitions:
>
>global constant xSetStretchBltMode = registerw32Function (gdi32,
>"SetStretchBltMode", {C_LONG, C_INT}, C_INT)
>global constant  HALFTONE                     = 4
>
>
>-- 2. In function stretchBlt () before calling xStretchBlt () insert this:
>
>if w32Func (xSetStretchBltMode, {
>         dstDC, HALFTONE
>         }) = 0 then
>         if message_box ("SetStretchBltMode failed", "", 0) then end if
>     end if
>
>-- copy area
>     if not w32Func( xStretchBlt, {
>...
>
>Run it. Now your image is displayed very nice.
>
>You'll have to be careful with this cause I think it doesn't work on all
>versions of Windows operating system. I have actual experience with it. If 
>I
>remember correct it doesn't work on some Winnt version (and win9x?).
>
>This mode works especially good if you shrink large image into very small
>image.
>
>
>




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