[fpc-pascal] Does FCL Image support transparency?

[Michael Van Canneyt]

On Fri, 16 Sep 2016, Reimar Grabowski wrote:

> Hi,
>
> I want to put watermarks on images in a command line application.
> This doesn't do the trick:
>
> ScaledImage:=TFPCompactImgRGBA8Bit.Create(Width, Height);
> Canvas:=TFPImageCanvas.Create(ScaledImage); // TFPImageCanvas
> Canvas.StretchDraw(0,0,Width,Height,Image); // Image is TFPCompactImgRGB8Bit
> Canvas.Draw(0,0,Watermark); // Watermark is an TFPCompactImgRGBA8Bit
>
> Watermark is a transparent PNG loaded from disk but the transparency is not respected when drawing it onto ScaledImage.
>
> Can FCL Image do this and if not what are my alternatives?

It should be able to do this, yes.

Michael.