type TCombineMode = (cmBlend, cmMerge);
Description
TCombineMode defines how drawing operations combine the foreground color with
the background.
It also determines how a bitmap is combined with the background when DrawMode is
set to dmBlend.
- cmBlend - Fast blending of foreground color with the background color using the supplied alpha. This method is
not suited for working and preserving alpha-channels. Use this more if you want to blend directly to the display buffer.
- cmMerge -
Uses a completely different formula that also merges the alpha-channels. This mode is slower than blending but
is suited for working with alpha-channels (eg. when composing in temporary buffers).