Since DrawImage just copies the RGBA channels and PaintImage blends the channels using the alpha channel, I'm assuming that DrawAlpha copies (but does not blend) the alpha channel. Is that the case?
If so then it follows there should be a PaintAlpha, which blends one alpha channel into another rather than overwriting it. Or maybe there's a workaround that I haven't thought of. What I'm trying to do is this: 1) Create a landscape image 2) Create a solar lighting image 3) Create an object lighting image 4) Composite them The landscape image is just the landscape with no lighting. The solar lighting image is RGBA and reflects the solar light level and color tint applied to the landscape image. The object lighting image is pure alpha and is generated by whatever non-solar light sources are in the scene (fire, generally). It should modify only the solar lighting image (blending its alpha channel), which is then drawn on top of the landscape image via PaintImage. This will allow the landscape to be colored and darkened by the solar lighting image, which has had "holes" made in it by the object lighting image. Is any of this possible? I've been thinking about it for about a week and have just started to implement code to experiment. I also have some gut feeling that I may need to invert an alpha channel to accomplish this, but there's no evidence to support that yet. Any thoughts are appreciated as always. -- Kevin Fishburne Eight Virtues www: http://sales.eightvirtues.com e-mail: sa...@eightvirtues.com phone: (770) 853-6271 ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
