Flat is a method implemented to the engine goimage in order to draw images on a background image.
This method can be used only with the multiple operation parameter op,
in the URL.
path: the foreground image, can be multiple.pos: the foreground destination as a rectanglecolor: the foreground color in Hex (without#), default is transparent.
The background is defined by the image transformed by the previous
operation. In order to draw an image on the background a position must
be given in the sub-parameter pos and the image path in the
sub-parameter path.
example:
/display?path=path/to/background.png&op=resize&w=100&h=100
&op=op:flat+path:path/to/foreground.png+pos:60.10.80.30
The value of pos must be the coordinates of the rectangle defined
according to the go image package:
an axis-aligned rectangle on the integer grid, defined by its top-left and
bottom-right Point.
The foreground image is resized in order to fit in the given rectangle and centered inside.
If several images are given in the same flat operation with the
subparameters path. The rectangle is cut in equal parts, horizontally if
the rectangle width Dx is superior to its height Dy and
vertically if it is not the case. Each images are then resized in
order to fit in each parts and centered inside. The order follow the
given order of path parameters in the URL.
