f5c637dc10
.. a fast helper for animations. It is similar to and inspired by the
PixelMap helper in Adafruit LED Animation library, but with an extremely
fast 'paste' method for setting a series of pixels. This is a common
operation for many animations, and can give a substantial speed improvement.
It's named `adafruit_pixelmap` so that we can package a compatible version
in pure Python for systems that can't fit it in C in flash, or for
Blinka.
This is a proof of concept and can make a very fast comet animation:
```python
import time
import adafruit_pixelbuf
import adafruti_pixelmap
import board
import neopixel
from supervisor import ticks_ms
from adafruit_led_animation.animation.solid import Solid
from adafruit_led_animation import color
pixel_pin = board.GP0
pixel_num = 96
pixels = neopixel.NeoPixel(pixel_pin, pixel_num, brightness=1, auto_write=False, pixel_order="RGB")
evens = adafruit_pixelmap.PixelMap(pixels, tuple(range(0, pixel_num, 2)))
odd_indices = tuple((i, i+2) for i in range(1, pixel_num, 4))
print(odd_indices)
odds = adafruit_pixelbuf.PixelMap(pixels, odd_indices)
assert len(odds) == len(odd_indices)
comet_length = 16
comet1 = [color.calculate_intensity(color.GREEN, ((1+i) / comet_length) ** 2.4)
for i in range(comet_length)]
comet2 = [color.calculate_intensity(color.PURPLE, ((1+i) / comet_length) ** 2.4)
for i in range(comet_length)]
pos1 = 0
pos2 = 96//4
while True:
evens.paste(comet1, pos1, wrap=True, reverse=False, others=0)
pos1 = (pos1 + 1) % len(evens)
odds.paste(comet2, pos2, wrap=True, reverse=True, others=0)
pos2 = (pos2 - 1) % len(odds)
pixels.show()
m = ticks_ms()
if m % 2000 > 1000:
time.sleep(.02)
```
66 lines
2.7 KiB
C
66 lines
2.7 KiB
C
/*
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* This file is part of the CircuitPython project, https://github.com/adafruit/circuitpython
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Rose Hooper
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/obj.h"
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#include "py/mphal.h"
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#include "py/runtime.h"
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#include "py/objproperty.h"
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#include "shared-bindings/adafruit_pixelbuf/__init__.h"
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#include "shared-bindings/adafruit_pixelbuf/PixelBuf.h"
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//| """A fast RGB(W) pixel buffer library for like NeoPixel and DotStar
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//|
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//| The `adafruit_pixelbuf` module provides the :py:class:`PixelBuf` class to accelerate
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//| RGB(W) strip/matrix manipulation, such as DotStar and Neopixel.
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//|
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//| Byteorders are configured with strings, such as "RGB" or "RGBD"."""
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//|
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//| # The types accepted when getting a pixel value
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//| PixelReturnType = Union[
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//| Tuple[int, int, int], Tuple[int, int, int, int], Tuple[int, int, int, float]
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//| ]
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//| PixelReturnSequence = Tuple[PixelReturnType]
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//| # The types returned when getting a pixel value
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//| PixelType = Union[int, PixelReturnType]
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//| PixelSequence = Union[Tuple[PixelType], List[PixelType]]
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// TODO: Pull in docs from adafruit_pixelbuf.
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STATIC const mp_rom_map_elem_t pixelbuf_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_adafruit_pixelbuf) },
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{ MP_ROM_QSTR(MP_QSTR_PixelBuf), MP_ROM_PTR(&pixelbuf_pixelbuf_type) },
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};
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STATIC MP_DEFINE_CONST_DICT(pixelbuf_module_globals, pixelbuf_module_globals_table);
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const mp_obj_module_t pixelbuf_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&pixelbuf_module_globals,
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};
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MP_REGISTER_MODULE(MP_QSTR_adafruit_pixelbuf, pixelbuf_module, CIRCUITPY_PIXELBUF);
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