DirectX Transparency Query

[atjs]

Refering to DirectX development.
Anyone figured out how to use the DDCOLORKEY type?? I need to make a certain colour (bright purple to be exact) transparent, but I don't know how to use the .high and .low values. Who's found out?

[Sastraxi]

Use This:

Sub Whatever
Dim CKey As DDCOLORKEY
Dim Surface1 as DirectDrawSurface7
dim DescS1 as DDSURFACEDESC2
Dim Transparent as long 
   
   Transparent=rgb(255,0,255)
   ckey.low=transparent
   ckey.high=transparent

   DFlash.lFlags = DDSD_CAPS Or DDSD_HEIGHT Or DDSD_WIDTH
   DFlash.ddsCaps.lCaps = DDSCAPS_OFFSCREENPLAIN
   DFlash.lWidth = 100
   DFlash.lHeight = 100
    
   Set Surface1 = DDraw.CreateSurfaceFromFile(App.Path & "\mybmp.bmp", DescS1)

   Surface1.SetColorKey DDCKEY_SRCBLT, CKey

End Sub

[Fox]

That would only work if your project uses 24-bit color... (I'm unsure about that). Anyway, here's a function to convert RGB to DirectX-Color.