[fpc-pascal] fpcanvas and FloodFill()

Graeme Geldenhuys graemeg.lists at gmail.com
Mon Jul 2 13:57:16 CEST 2007

On 02/07/07, Michael Van Canneyt <michael at freepascal.org> wrote:
> The FPImagecanvas has it implemented, you should be able to get some inspiration
> from that. Look also in the pixtools unit.

Thanks Michael.
The hard bit (without looking at any code) will be the rules when to paint.

Am I understanding FloodFill() correctly.  For example:
If we have a Canvas with shapes painted on it.  The inside of a
rectangle might have the same background color as the canvas, but we
don't want to paint inside the rectangle as it is a closed shape.
Then we might have a another shape with a outline, but the shape isn't
closed (end points of polygon doesn't meet up), so we still need to
paint inside it.

This is going to be fun.  I'll have a look at those units you mentioned.

So far I have implement about 70% of TFPCustomCanvas in my new fpGUI
framework. I've also completed Canvas.Pen, Canvas.Brush and
Canvas.Font support.  All under X11 only, but now that I know what to
do, GDI should hopefully go quicker.

  - Graeme -

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