Transparent textures with CreateTexture?

Can I have a transparent texture that is dynamically created using CreateTexture? The following doesn't work...


; Create texture of size 256x256
tex = CreateTexture(256, 256, 4)

; Set buffer - texture buffer
SetBuffer TextureBuffer(tex)

; Clear texture buffer with a black background
ClsColor 0, 0, 0
Cls

Color 255,0,0
Text 0, 0, "This is a test texture!"

; Texture cube with texture
EntityTexture cube,tex



PS. What are the tags for posting code?

No. Because you're not writting any data to the textures Alpha Channel.

How do I do that?

You can write this alpha data with writepixelfast - see code archives.

This is a custom CreateTexture() function I wrote which gives the texture a starting alpha value.

Function myCreateTexture( width, height, flags=0, frames=1, r=0, g=0, b=0, a=255 )
	
	If width=0 Or height=0
		Return 0
	EndIf
	
	pBuffer = GraphicsBuffer(  )
	tex = CreateTexture( width, height, flags, frames )
	SetBuffer TextureBuffer( tex )
	argb = (b Or (g Shl 8) Or (r Shl 16) Or (a Shl 24))
	For A = 0 To width
		For B = 0 To height
			WritePixel A, B, argb
		Next
	Next
	SetBuffer pBuffer

	Return tex
	
End Function

The alpha information is stored in the 8 bytes after the red value.

{code}
...
{/code}

But replace {} with []:

...

http://www.blitzbasic.com/Community/posts.php?topic=26659

Check out the link above for a function to create a masked texture using createtexture