105 lines
3.8 KiB
C
105 lines
3.8 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
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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 "shared-bindings/displayio/OnDiskBitmap.h"
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#include <stdint.h>
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#include "py/runtime.h"
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#include "supervisor/shared/translate.h"
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//| .. currentmodule:: displayio
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//|
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//| :class:`OnDiskBitmap` -- Loads pixels straight from disk
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//| ==========================================================================
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//|
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//| Loads values straight from disk. This minimizes memory use but can lead to
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//| much slower pixel load times. These load times may result in frame tearing where only part of
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//| the image is visible.
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//|
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//| .. warning:: This will likely be changed before 4.0.0. Consider it very experimental.
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//|
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//| It's easiest to use on a board with a built in display such as the `Hallowing M0 Express
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//| <https://www.adafruit.com/product/3900>`_.
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//|
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//| .. code-block:: Python
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//|
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//| import board
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//| import displayio
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//| import time
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//| import pulseio
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//|
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//| backlight = pulseio.PWMOut(board.TFT_BACKLIGHT)
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//| splash = displayio.Group()
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//| board.DISPLAY.show(splash)
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//|
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//| with open("/sample.bmp", "rb") as f:
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//| odb = displayio.OnDiskBitmap(f)
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//| face = displayio.Sprite(odb, pixel_shader=displayio.ColorConverter(), position=(0,0))
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//| splash.append(face)
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//| # Wait for the image to load.
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//| board.DISPLAY.wait_for_frame()
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//|
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//| # Fade up the backlight
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//| for i in range(100):
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//| backlight.duty_cycle = i * (2 ** 15) // 100
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//| time.sleep(0.01)
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//|
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//| # Wait forever
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//| while True:
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//| pass
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//|
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//| .. class:: OnDiskBitmap(file)
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//|
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//| Create an OnDiskBitmap object with the given file.
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//|
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//| :param file file: The open bitmap file
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//|
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STATIC mp_obj_t displayio_ondiskbitmap_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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mp_arg_check_num(n_args, kw_args, 1, 1, false);
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if (!MP_OBJ_IS_TYPE(pos_args[0], &mp_type_fileio)) {
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mp_raise_TypeError(translate("file must be a file opened in byte mode"));
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}
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displayio_ondiskbitmap_t *self = m_new_obj(displayio_ondiskbitmap_t);
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self->base.type = &displayio_ondiskbitmap_type;
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common_hal_displayio_ondiskbitmap_construct(self, MP_OBJ_TO_PTR(pos_args[0]));
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return MP_OBJ_FROM_PTR(self);
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}
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STATIC const mp_rom_map_elem_t displayio_ondiskbitmap_locals_dict_table[] = {
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};
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STATIC MP_DEFINE_CONST_DICT(displayio_ondiskbitmap_locals_dict, displayio_ondiskbitmap_locals_dict_table);
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const mp_obj_type_t displayio_ondiskbitmap_type = {
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{ &mp_type_type },
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.name = MP_QSTR_OnDiskBitmap,
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.make_new = displayio_ondiskbitmap_make_new,
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.locals_dict = (mp_obj_dict_t*)&displayio_ondiskbitmap_locals_dict,
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};
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