Problem with colorkeying

M

Maraxus

Newcomer
Joined
Feb 21, 2006
Messages
1
Hello everyone.

I am working on a small project with C# and DX9, and I have recently encountered some difficulties with colorkeying. For some reason, instead of making transparent the pixels in magenta (my color key), I get them rendered in black right on top of the lower layers..... I have no clue of why DX is behaving in such a way and therefore ask for your help and knowledge.

Here you have some code snipets:

Code: 
private const int COLOR_KEY = unchecked((int) 0xffff00ff);

Code: 
texture.d3dTexture = TextureLoader.FromStream(device, memStream, 0, 0, 1, Usage.None, Format.Unknown, Pool.Managed, Filter.Point, Filter.Point, COLOR_KEY);

Where memStream is just a MemoryStrem object which has a complete bmp in memory (I have my own custom resource file format). Before you ask the texture is loaded perfectly, the only problem is how the color key is rendered by DX.

Code: 
// Set up render state
			device.RenderState.AlphaBlendEnable = true;							// Enable alpha
			device.RenderState.AlphaDestinationBlend = Blend.InvSourceAlpha;	// Set up alpha for colorkeying
			device.RenderState.AlphaSourceBlend = Blend.SourceAlpha;			// Set up alpha for colorkeying
			device.RenderState.Clipping = false;								// Disable clipping
			device.RenderState.Lighting = false;								// Disable lightning
			device.RenderState.CullMode = Cull.None;							// Disable culling
			device.RenderState.DebugMonitorTokenEnabled = false;				// Disable monitor debuging
			device.RenderState.ZBufferEnable = false;							// Disable Z Buffer
			device.RenderState.FillMode = fillMode;								// Set the selected fill mode

As you may see from the renderstate settings, I'm rendering using TLVertexs.

I'm really clueless.... I tried a few things but nothing seems to work.....

Thanks in advanced for all your help.
 
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