86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
/*
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* This file is part of the Circuit Python 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 Roy 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/_pixelbuf/__init__.h"
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#include "shared-bindings/_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 `_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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// TODO: Pull in docs from pypixelbuf.
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//| def colorwheel(n: float) -> int:
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//| """C implementation of the common wheel() function found in many examples.
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//| Returns the colorwheel RGB value as an integer value for n (usable in :py:class:`PixelBuf`, neopixel, and dotstar)."""
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//| ...
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//|
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//| def wheel(n: float) -> int:
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//| """Use of wheel() is deprecated. Please use colorwheel()."""
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//|
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STATIC mp_obj_t pixelbuf_colorwheel(mp_obj_t n) {
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return MP_OBJ_NEW_SMALL_INT(colorwheel(MP_OBJ_IS_SMALL_INT(n) ? MP_OBJ_SMALL_INT_VALUE(n) : mp_obj_float_get(n)));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_colorwheel_obj, pixelbuf_colorwheel);
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const int32_t colorwheel(float pos) {
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if (pos > 255) {
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pos = pos - ((uint32_t)(pos / 256) * 256);
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}
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if (pos < 85)
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return (uint8_t)(255 - (pos * 3)) << 16 | (uint8_t)(pos * 3) << 8;
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else if (pos < 170) {
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pos -= 85;
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return (uint8_t)(255 - (pos * 3)) << 8 | (uint8_t)(pos * 3);
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} else {
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pos -= 170;
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return (uint8_t)(pos * 3) << 16 | (uint8_t)(255 - (pos * 3));
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}
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}
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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__pixelbuf) },
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{ MP_ROM_QSTR(MP_QSTR_PixelBuf), MP_ROM_PTR(&pixelbuf_pixelbuf_type) },
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{ MP_ROM_QSTR(MP_QSTR_wheel), MP_ROM_PTR(&pixelbuf_colorwheel_obj) },
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{ MP_ROM_QSTR(MP_QSTR_colorwheel), MP_ROM_PTR(&pixelbuf_colorwheel_obj) },
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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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