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draw565: Optimize the string drawing

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Currently there is a redundant fill operation issued for every character
drawn. This was added to draw the background colours correctly but the
change did not account for the optimized character rendering in
_draw_glyph().

This results in ~15% performance improvement for character rendering

Fixes: cc34c5d46d ("draw565: Fix wrong background color of strings")
Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
This commit is contained in:
Daniel Thompson 2021-03-29 22:16:43 +01:00
parent ed3f1c1e71
commit 58b5c0378e
1 changed files with 2 additions and 3 deletions
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5
wasp/draw565.py
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@ -87,8 +87,8 @@ def _draw_glyph(display, glyph, x, y, bgfg):
(px, h, w) = glyph
buf = display.linebuffer[0:2*(w+1)]
buf[2*w] = 0
buf[2*w + 1] = 0
buf[2*w] = bgfg >> 24
buf[2*w + 1] = (bgfg >> 16) & 0xff
bytes_per_row = (w + 7) // 8
display.set_window(x, y, w+1, h)
@ -324,7 +324,6 @@ class Draw565(object):
for ch in s:
glyph = font.get_ch(ch)
_draw_glyph(display, glyph, x, y, bgfg)
self.fill(bg, x+glyph[2], y, 1, glyph[1])
x += glyph[2] + 1
if width: