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extmod/modframebuf: Add ellipse drawing method.

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This commit is contained in:
Peter Hinch
2022-08-10 14:51:19 +01:00
committed by Damien George
parent 127b340438
commit 42ec9703a0
5 changed files with 885 additions and 6 deletions
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18
docs/library/framebuf.rst
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@@ -11,8 +11,8 @@ class FrameBuffer
-----------------
The FrameBuffer class provides a pixel buffer which can be drawn upon with
pixels, lines, rectangles, text and even other FrameBuffer's. It is useful
when generating output for displays.
pixels, lines, rectangles, ellipses, text and even other FrameBuffers. It is
useful when generating output for displays.
For example::
@@ -84,6 +84,20 @@ The following methods draw shapes onto the FrameBuffer.
The optional *f* parameter can be set to ``True`` to fill the rectangle.
Otherwise just a one pixel outline is drawn.
.. method:: FrameBuffer.ellipse(x, y, xr, yr, c[, f, m])
Draw an ellipse at the given location. Radii *xr* and *yr* define the
geometry; equal values cause a circle to be drawn. The *c* parameter
defines the color.
The optional *f* parameter can be set to ``True`` to fill the ellipse.
Otherwise just a one pixel outline is drawn.
The optional *m* parameter enables drawing to be restricted to certain
quadrants of the ellipse. The LS four bits determine which quadrants are
to be drawn, with bit 0 specifying Q1, b1 Q2, b2 Q3 and b3 Q4. Quadrants
are numbered counterclockwise with Q1 being top right.
Drawing text
------------