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circuitpython/shared-bindings/displayio/Palette.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "shared-bindings/displayio/Palette.h"
#include <stdint.h>
#include "lib/utils/context_manager_helpers.h"
#include "py/binary.h"
#include "py/objproperty.h"
#include "py/runtime.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-bindings/util.h"
#include "supervisor/shared/translate.h"
//| class Palette:
//| """Map a pixel palette_index to a full color. Colors are transformed to the display's format internally to
//| save memory."""
//|
//| def __init__(self, color_count: int) -> None:
//| """Create a Palette object to store a set number of colors.
//|
//| :param int color_count: The number of colors in the Palette"""
//| ...
//|
// TODO(tannewt): Add support for other color formats.
// TODO(tannewt): Add support for 8-bit alpha blending.
//|
STATIC mp_obj_t displayio_palette_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_color_count };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_color_count, MP_ARG_REQUIRED | MP_ARG_INT },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
displayio_palette_t *self = m_new_obj(displayio_palette_t);
self->base.type = &displayio_palette_type;
common_hal_displayio_palette_construct(self, args[ARG_color_count].u_int);
return MP_OBJ_FROM_PTR(self);
}
//| def __bool__(self) -> bool:
//| ...
//|
//| def __len__(self) -> int:
//| """Returns the number of colors in a Palette"""
//| ...
//|
STATIC mp_obj_t group_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
displayio_palette_t *self = MP_OBJ_TO_PTR(self_in);
switch (op) {
case MP_UNARY_OP_BOOL: return mp_const_true;
case MP_UNARY_OP_LEN:
return MP_OBJ_NEW_SMALL_INT(common_hal_displayio_palette_get_len(self));
default: return MP_OBJ_NULL; // op not supported
}
}
//| def __getitem__(self, index: int) -> Optional[int]:
//| r"""Return the pixel color at the given index as an integer."""
//| ...
//|
//| def __setitem__(self, index: int, value: Union[int, ReadableBuffer, Tuple[int, int, int]]) -> None:
//| r"""Sets the pixel color at the given index. The index should be an integer in the range 0 to color_count-1.
//|
//| The value argument represents a color, and can be from 0x000000 to 0xFFFFFF (to represent an RGB value).
//| Value can be an int, bytes (3 bytes (RGB) or 4 bytes (RGB + pad byte)), bytearray,
//| or a tuple or list of 3 integers.
//|
//| This allows you to::
//|
//| palette[0] = 0xFFFFFF # set using an integer
//| palette[1] = b'\xff\xff\x00' # set using 3 bytes
//| palette[2] = b'\xff\xff\x00\x00' # set using 4 bytes
//| palette[3] = bytearray(b'\x00\x00\xFF') # set using a bytearay of 3 or 4 bytes
//| palette[4] = (10, 20, 30) # set using a tuple of 3 integers"""
//| ...
//|
STATIC mp_obj_t palette_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
if (value == MP_OBJ_NULL) {
// delete item
return MP_OBJ_NULL; // op not supported
}
// Slicing not supported. Use a duplicate Palette to swap multiple colors atomically.
if (MP_OBJ_IS_TYPE(index_in, &mp_type_slice)) {
return MP_OBJ_NULL;
}
displayio_palette_t *self = MP_OBJ_TO_PTR(self_in);
size_t index = mp_get_index(&displayio_palette_type, self->color_count, index_in, false);
// index read
if (value == MP_OBJ_SENTINEL) {
return MP_OBJ_NEW_SMALL_INT(common_hal_displayio_palette_get_color(self, index));
}
// Convert a tuple or list to a bytearray.
if (MP_OBJ_IS_TYPE(value, &mp_type_tuple) ||
MP_OBJ_IS_TYPE(value, &mp_type_list)) {
value = mp_type_bytes.make_new(&mp_type_bytes, 1, &value, NULL);
}
uint32_t color;
mp_int_t int_value;
mp_buffer_info_t bufinfo;
if (mp_get_buffer(value, &bufinfo, MP_BUFFER_READ)) {
if (bufinfo.typecode != 'b' && bufinfo.typecode != 'B' && bufinfo.typecode != BYTEARRAY_TYPECODE) {
mp_raise_ValueError(translate("color buffer must be a bytearray or array of type 'b' or 'B'"));
}
uint8_t* buf = bufinfo.buf;
if (bufinfo.len == 3 || bufinfo.len == 4) {
color = buf[0] << 16 | buf[1] << 8 | buf[2];
} else {
mp_raise_ValueError(translate("color buffer must be 3 bytes (RGB) or 4 bytes (RGB + pad byte)"));
}
} else if (mp_obj_get_int_maybe(value, &int_value)) {
if (int_value < 0 || int_value > 0xffffff) {
mp_raise_TypeError(translate("color must be between 0x000000 and 0xffffff"));
}
color = int_value;
} else {
mp_raise_TypeError(translate("color buffer must be a buffer, tuple, list, or int"));
}
common_hal_displayio_palette_set_color(self, index, color);
return mp_const_none;
}
//| def make_transparent(self, palette_index: int) -> None:
//| ...
//|
STATIC mp_obj_t displayio_palette_obj_make_transparent(mp_obj_t self_in, mp_obj_t palette_index_obj) {
displayio_palette_t *self = MP_OBJ_TO_PTR(self_in);
mp_int_t palette_index;
if (!mp_obj_get_int_maybe(palette_index_obj, &palette_index)) {
mp_raise_ValueError(translate("palette_index should be an int"));
}
common_hal_displayio_palette_make_transparent(self, palette_index);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(displayio_palette_make_transparent_obj, displayio_palette_obj_make_transparent);
//| def make_opaque(self, palette_index: int) -> None:
//| ...
//|
STATIC mp_obj_t displayio_palette_obj_make_opaque(mp_obj_t self_in, mp_obj_t palette_index_obj) {
displayio_palette_t *self = MP_OBJ_TO_PTR(self_in);
mp_int_t palette_index;
if (!mp_obj_get_int_maybe(palette_index_obj, &palette_index)) {
mp_raise_ValueError(translate("palette_index should be an int"));
}
common_hal_displayio_palette_make_opaque(self, palette_index);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(displayio_palette_make_opaque_obj, displayio_palette_obj_make_opaque);
STATIC const mp_rom_map_elem_t displayio_palette_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_make_transparent), MP_ROM_PTR(&displayio_palette_make_transparent_obj) },
{ MP_ROM_QSTR(MP_QSTR_make_opaque), MP_ROM_PTR(&displayio_palette_make_opaque_obj) },
};
STATIC MP_DEFINE_CONST_DICT(displayio_palette_locals_dict, displayio_palette_locals_dict_table);
const mp_obj_type_t displayio_palette_type = {
{ &mp_type_type },
.name = MP_QSTR_Palette,
.make_new = displayio_palette_make_new,
.subscr = palette_subscr,
.unary_op = group_unary_op,
.getiter = mp_obj_new_generic_iterator,
.locals_dict = (mp_obj_dict_t*)&displayio_palette_locals_dict,
};
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