Hi
All the Max2D functions set the current texture through a private helper function called EnableTex, which is a wrapper for glBindTexture. Related code is here
Function BindTex( name )
If name=state_boundtex Return
glBindTexture GL_TEXTURE_2D,name
state_boundtex=name
End Function
Function EnableTex( name )
BindTex name
If state_texenabled Return
glEnable GL_TEXTURE_2D
state_texenabled=True
End Function
Function DisableTex()
If Not state_texenabled Return
glDisable GL_TEXTURE_2D
state_texenabled=False
End Function
As you can see, it essentially does nothing if the same texture is activate more than once in a row. The trouble is that we can't get to the state_boundtex variable if we ever want to call glBindTexture ourselves.
This demonstrates the problem:
Graphics 640,480,0
img1:TImage = LoadImage("ball.png")
img2:TPixmap = LoadPixmap("arrow.png")
texture_name:Int = bglTexFromPixmap(img2)
Cls
DrawImage img1,100,100
glBindTexture GL_TEXTURE_2D, texture_name
DrawImage img1,300,100
Flip
WaitKey
You should see "ball.png" displayed twice, but instead you see "ball.png" and "arrow.png" displayed side-by-side.
If we could replace the glBindTexture line with a call to EnableTex this problem would go away and it would be easier to make "Max2D-compatible" modules.
Cheers,
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