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)
```
69 lines
2.1 KiB
C
69 lines
2.1 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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#pragma once
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#include "py/obj.h"
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#include "py/objarray.h"
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typedef struct {
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uint8_t r;
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uint8_t g;
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uint8_t b;
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uint8_t w;
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} pixelbuf_rgbw_t;
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typedef struct {
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uint8_t bpp;
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pixelbuf_rgbw_t byteorder;
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bool has_white;
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bool is_dotstar;
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mp_obj_t order_string;
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} pixelbuf_byteorder_details_t;
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typedef struct {
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mp_obj_base_t base;
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size_t pixel_count;
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uint16_t bytes_per_pixel;
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uint16_t scaled_brightness;
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pixelbuf_byteorder_details_t byteorder;
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mp_float_t brightness;
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mp_obj_t transmit_buffer_obj;
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// The post_brightness_buffer is offset into the buffer allocated in transmit_buffer_obj to
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// account for any header.
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uint8_t *post_brightness_buffer;
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uint8_t *pre_brightness_buffer;
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bool auto_write;
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} pixelbuf_pixelbuf_obj_t;
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#define PIXEL_R 0
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#define PIXEL_G 1
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#define PIXEL_B 2
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#define PIXEL_W 3
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#define DOTSTAR_LED_START 0b11100000
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#define DOTSTAR_LED_START_FULL_BRIGHT 0xFF
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