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writer.py: support framebuf_utils.mpy.

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Peter Hinch 2020-10-02 17:56:40 +01:00
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@ -253,7 +253,7 @@ rendered in foreground color on background color (or reversed if `invert` is
### 2.2.4 A performance boost
Rendering performance of the `Cwriter` class is slow: owing to limitations in
the `frmebuf.blit` method the class renders glyphs one pixel at a time. There
the `framebuf.blit` method the class renders glyphs one pixel at a time. There
is a way to improve performance. It was developed by Jim Mussared (@jimmo) and
consists of a native C module.
@ -270,7 +270,8 @@ It is suggested that moving the appropriate `framebuf_utils.mpy` to the target
is only done once the basic operation of an application has been verified.
The native module does not support the `CWriter.invert_display` option. If this
is used, the presence of the native module will have no effect.
is used, the presence of the native module will have no effect. The module has
no effect on the `Writer` class which uses fast rendering by default.
# 3. Notes