121 lines
4.3 KiB
C
121 lines
4.3 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 "types.h"
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#include "__init__.h"
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#include "PixelBuf.h"
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#include "../../shared-module/_pixelbuf/PixelBuf.h"
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//| :mod:`_pixelbuf` --- Fast RGB(W) pixel buffer and helpers
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//| ===========================================================
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//| .. module:: _pixelbuf
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//| :synopsis: 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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//| Libraries
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//|
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//| .. toctree::
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//| :maxdepth: 3
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//|
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//| PixelBuf
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//| .. function:: wheel(n)
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//|
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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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STATIC mp_obj_t pixelbuf_wheel(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_wheel_obj, pixelbuf_wheel);
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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)(pos * 3) << 16 | (uint8_t)(255 - (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)) << 16 | (uint8_t)(pos * 3);
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} else {
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pos -= 170;
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return (uint8_t)(pos * 3) << 8 | (uint8_t)(255 - pos * 3);
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}
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}
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//| .. function:: fill(pixelbuf, color)
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//|
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//| Fills the given pixelbuf with the given color.
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//|
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STATIC mp_obj_t pixelbuf_fill(mp_obj_t pixelbuf_in, mp_obj_t value) {
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mp_obj_t obj = mp_instance_cast_to_native_base(pixelbuf_in, &pixelbuf_pixelbuf_type);
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if (obj == MP_OBJ_NULL)
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mp_raise_TypeError(translate("Expected a PixelBuf instance"));
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pixelbuf_pixelbuf_obj_t *pixelbuf = MP_OBJ_TO_PTR(obj);
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for (size_t offset = 0; offset < pixelbuf->bytes; offset+= pixelbuf->pixel_step) {
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pixelbuf_set_pixel(pixelbuf->buf + offset, pixelbuf->two_buffers ? (pixelbuf->rawbuf + offset) : NULL,
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pixelbuf->brightness, value, &pixelbuf->byteorder, pixelbuf->byteorder.is_dotstar);
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}
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if (pixelbuf->auto_write)
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pixelbuf_call_show(pixelbuf_in);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(pixelbuf_fill_obj, pixelbuf_fill);
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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_wheel_obj) },
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{ MP_ROM_QSTR(MP_QSTR_fill), MP_ROM_PTR(&pixelbuf_fill_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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