Move a small Bitmap over a large Bitmap

[romanhoehne]

Hi,

I've downloaded some samples for directdraw, but only in directx7 (SpaceBreakout) or I've found some for dx9 in C or C++ on this pages here.

I want to move some small bitmaps (50 times 50 Pixs) with black as transparent color over a map (400 times 400 Pixs visible, 1000 times 1000 virtual). All in mode "display.SetCooperativeLevel(this, CooperativeLevelFlags.Normal);" . FullScreen maybe later...

 

Are here some good hints in csharp for directx9 here or has someone an example?

 

Here is, what I have tried so far (the "knight" has still a black Border...):

 

private void Draw()

....

primary.Draw(destination, offscreen, new Rectangle(i,j,300,300), Microsoft.DirectX.DirectDraw.DrawFlags.Wait, new DrawEffects() ) ;

primary.Draw(destination1, knight, DrawFlags.Wait);

 

private void CreateSurfaces()

{

display = new Device();

display.SetCooperativeLevel(this, CooperativeLevelFlags.Normal);

SurfaceDescription description = new SurfaceDescription();

description.SurfaceCaps.PrimarySurface = true;

primary = new Surface(description, display);

description.Clear();

clip = new Clipper(display);

clip.Window = this;

primary.Clipper = clip;

description.Clear();

offscreen = new Surface("card.bmp", description, display);

description.Clear();

ColorKey CC = new ColorKey();

CC.ColorSpaceHighValue = 0;

CC.ColorSpaceLowValue = 0;

knight = new Surface("knight.bmp", description, display);

knight.SetColorKey(Microsoft.DirectX.DirectDraw.ColorKeyFlags.SourceDraw, CC);

}

 

Maybe, I have forgotten something

 

Best regards

Roman

[slantz]

It looks like you've got just about everything, but when you draw your knight, try this:

 

primary.Draw(destination1, knight, DrawFlags.Wait | DrawFlags.KeySource);

 

My understanding is that the DrawFlags.KeySource flag tells the Draw() function to use the transparency you set up with your ColorKey.

 

Hope that helps.

 

-Hiro_Antagonist

[romanhoehne]

Thanx alot!

 

It works :) :)

Regards,

Roman

[slantz]

Glad to be of service. =)

 

-Hiro_Antagonist