Sprite.Draw2D and Alphablending?

I'm trying to do alphablended sprites (not color keyed sprites), but it doesn't seems to works. I tried to load .dds with alpha channel and .bmp (32bpp, last channel should be obviously alpha, but i don't know if TextureLoader.FromFile() understand the last channel as an alpha channel).

I've put the device's renderstate at alphablendingenable = true (don't have any PS GFX card). But it doesn't seems to work. Am I missing something Maybe should I try to put some texturestage state But which value should I use

System specs:
Windows 2000 SP4
Ati 7200 AIW
Dx 9 SDK (Apr 2005 release, jun release only works on XP and above)
Visual C# 2005 (with Framework .Net beta 2)

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Sprite.Draw2D and Alphablending?

GlennPierce
Try to use PNG files. Been there done that!

[]s
owned
Make sure you set the Color in your Draw to Color.White

This will allow all channels to pass through. If you set this to 0 or black then the ARGB (0,0,0,0) will be multiplied to each pixel of your image.

Here is some sample code: This sample draws a red line from top left to bottom right.

Bitmap myImage = new Bitmap(100, 100);
Graphics g = Graphics.FromImage(myImage);
g.Clear(Color.FromArgb(0)); //Fill background with a transparent color
g.DrawLine(new Pen(Color.Red, 10),1,1,100,100);
Texture myTexture = new Texture(device, myImage, Usage.None, Pool.Managed);
Sprite sprite = new Sprite(device);
sprite.Begin(SpriteFlags.AlphaBlend);
sprite.Draw2D(myTexture, new Point(0, 0), 0, new Point(0, 0), Color.White);
sprite.End();

Hope this helps.

Andrew
Mar10us
So i've tested some of your suggestions:

PNG with SpriteFlags.None: No transparency
PNG with SpriteFlags.AlphaBlending: No image displayed (very curious, isn't it )

I surely miss something, but I don't know what. My last experience with Direct3D was with DirectX 6 (and C++ of course). I'm a bit lost with managed DirectX :/.
amberlianne
When you call Sprite.Begin are you passing the AlphaBlend flag If you're using the Sprite interface you don't need to touch the renderstates or texturestages yourself.
Sprite.Draw2D and Alphablending?

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