draw565: Optimize filled rectangle drawing
The original approach is *really* bad at drawing vertical lines (it ends up working a pixel at a time and works the chip select for each one. Optimize both the pixel fill and the use of the line buffer. The result is 20% faster for quarter screen fills, 3x for horizontal lines and 6x for vertical lines. Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
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@ -125,9 +125,32 @@ class Draw565(object):
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:param h: Height of the rectangle, defaults to None (which means select
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the bottom-most pixel of the display)
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"""
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display = self._display
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quick_write = display.quick_write
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if bg is None:
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bg = self._bgfg >> 16
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self._display.fill(bg, x, y, w, h)
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if w is None:
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w = display.width - x
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if h is None:
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h = display.height - y
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display.set_window(x, y, w, h)
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remaining = w * h
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# Populate the line buffer
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buf = display.linebuffer
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sz = len(display.linebuffer) // 2
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_fill(buf, bg, min(sz, remaining), 0)
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display.quick_start()
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while remaining >= sz:
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quick_write(buf)
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remaining -= sz
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if remaining:
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quick_write(memoryview(display.linebuffer)[0:2*remaining])
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display.quick_end()
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@micropython.native
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def blit(self, image, x, y, fg=0xffff, c1=0x4a69, c2=0x7bef):
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