circuitpython/shared-bindings/_pixelbuf/PixelBuf.c

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/*
* This file is part of the Circuit Python project, https://github.com/adafruit/circuitpython
*
* The MIT License (MIT)
*
* Copyright (c) 2018 Roy Hooper
*
* 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 "py/obj.h"
#include "py/objarray.h"
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#include "py/objtype.h"
#include "py/mphal.h"
#include "py/runtime.h"
#include "py/binary.h"
#include "py/objproperty.h"
#include "py/runtime.h"
#include "py/gc.h"
#include <string.h>
#include "shared-bindings/_pixelbuf/PixelBuf.h"
#include "shared-module/_pixelbuf/PixelBuf.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#ifdef CIRCUITPY_ULAB
#include "extmod/ulab/code/ndarray.h"
#endif
extern const int32_t colorwheel(float pos);
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static void parse_byteorder(mp_obj_t byteorder_obj, pixelbuf_byteorder_details_t *parsed);
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//| class PixelBuf:
//| """A fast RGB[W] pixel buffer for LED and similar devices."""
//|
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//| def __init__(self, size: int, *, byteorder: str = "BGR", brightness: float = 0, auto_write: bool = False, header: ReadableBuffer = b"", trailer: ReadableBuffer = b"") -> None:
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//| """Create a PixelBuf object of the specified size, byteorder, and bits per pixel.
//|
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//| When brightness is less than 1.0, a second buffer will be used to store the color values
//| before they are adjusted for brightness.
//|
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//| When ``P`` (PWM duration) is present as the 4th character of the byteorder
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//| string, the 4th value in the tuple/list for a pixel is the individual pixel
//| brightness (0.0-1.0) and will enable a Dotstar compatible 1st byte for each
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//| pixel.
//|
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//| :param int size: Number of pixels
//| :param str byteorder: Byte order string (such as "RGB", "RGBW" or "PBGR")
//| :param float brightness: Brightness (0 to 1.0, default 1.0)
//| :param bool auto_write: Whether to automatically write pixels (Default False)
//| :param ~_typing.ReadableBuffer header: Sequence of bytes to always send before pixel values.
//| :param ~_typing.ReadableBuffer trailer: Sequence of bytes to always send after pixel values."""
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//| ...
//|
STATIC mp_obj_t pixelbuf_pixelbuf_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
mp_arg_check_num(n_args, kw_args, 1, MP_OBJ_FUN_ARGS_MAX, true);
enum { ARG_size, ARG_byteorder, ARG_brightness, ARG_auto_write, ARG_header, ARG_trailer };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_size, MP_ARG_REQUIRED | MP_ARG_INT },
{ MP_QSTR_byteorder, MP_ARG_KW_ONLY | MP_ARG_OBJ, { .u_obj = MP_OBJ_NEW_QSTR(MP_QSTR_BGR) } },
{ MP_QSTR_brightness, MP_ARG_KW_ONLY | MP_ARG_OBJ, { .u_obj = mp_const_none } },
{ MP_QSTR_auto_write, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
{ MP_QSTR_header, MP_ARG_KW_ONLY | MP_ARG_OBJ, { .u_obj = mp_const_none } },
{ MP_QSTR_trailer, MP_ARG_KW_ONLY | MP_ARG_OBJ, { .u_obj = mp_const_none } },
};
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);
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pixelbuf_byteorder_details_t byteorder_details;
parse_byteorder(args[ARG_byteorder].u_obj, &byteorder_details);
mp_buffer_info_t header_bufinfo;
mp_buffer_info_t trailer_bufinfo;
if (!mp_get_buffer(args[ARG_header].u_obj, &header_bufinfo, MP_BUFFER_READ)) {
header_bufinfo.buf = NULL;
header_bufinfo.len = 0;
}
if (!mp_get_buffer(args[ARG_trailer].u_obj, &trailer_bufinfo, MP_BUFFER_READ)) {
trailer_bufinfo.buf = NULL;
trailer_bufinfo.len = 0;
}
float brightness = 1.0;
if (args[ARG_brightness].u_obj != mp_const_none) {
brightness = mp_obj_get_float(args[ARG_brightness].u_obj);
if (brightness < 0) {
brightness = 0;
} else if (brightness > 1) {
brightness = 1;
}
}
// Validation complete, allocate and populate object.
pixelbuf_pixelbuf_obj_t *self = m_new_obj(pixelbuf_pixelbuf_obj_t);
self->base.type = &pixelbuf_pixelbuf_type;
common_hal__pixelbuf_pixelbuf_construct(self, args[ARG_size].u_int,
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&byteorder_details, brightness, args[ARG_auto_write].u_bool, header_bufinfo.buf,
header_bufinfo.len, trailer_bufinfo.buf, trailer_bufinfo.len);
return MP_OBJ_FROM_PTR(self);
}
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static void parse_byteorder(mp_obj_t byteorder_obj, pixelbuf_byteorder_details_t *parsed) {
if (!mp_obj_is_str(byteorder_obj)) {
mp_raise_TypeError(translate("byteorder is not a string"));
}
size_t bo_len;
const char *byteorder = mp_obj_str_get_data(byteorder_obj, &bo_len);
if (bo_len < 3 || bo_len > 4) {
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mp_raise_ValueError(translate("Invalid byteorder string"));
}
parsed->order_string = byteorder_obj;
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parsed->bpp = bo_len;
char *dotstar = strchr(byteorder, 'P');
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char *r = strchr(byteorder, 'R');
char *g = strchr(byteorder, 'G');
char *b = strchr(byteorder, 'B');
char *w = strchr(byteorder, 'W');
int num_chars = (dotstar ? 1 : 0) + (w ? 1 : 0) + (r ? 1 : 0) + (g ? 1 : 0) + (b ? 1 : 0);
if ((num_chars < parsed->bpp) || !(r && b && g)) {
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mp_raise_ValueError(translate("Invalid byteorder string"));
}
parsed->is_dotstar = dotstar ? true : false;
parsed->has_white = w ? true : false;
parsed->byteorder.r = r - byteorder;
parsed->byteorder.g = g - byteorder;
parsed->byteorder.b = b - byteorder;
parsed->byteorder.w = w ? w - byteorder : 0;
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// The dotstar brightness byte is always first (as it goes with the pixel start bits)
if (dotstar && byteorder[0] != 'P') {
mp_raise_ValueError(translate("Invalid byteorder string"));
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}
if (parsed->has_white && parsed->is_dotstar) {
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mp_raise_ValueError(translate("Invalid byteorder string"));
}
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}
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//| bpp: int
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//| """The number of bytes per pixel in the buffer (read-only)"""
//|
STATIC mp_obj_t pixelbuf_pixelbuf_obj_get_bpp(mp_obj_t self_in) {
return MP_OBJ_NEW_SMALL_INT(common_hal__pixelbuf_pixelbuf_get_bpp(self_in));
}
MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_pixelbuf_get_bpp_obj, pixelbuf_pixelbuf_obj_get_bpp);
const mp_obj_property_t pixelbuf_pixelbuf_bpp_obj = {
.base.type = &mp_type_property,
.proxy = {(mp_obj_t)&pixelbuf_pixelbuf_get_bpp_obj,
(mp_obj_t)&mp_const_none_obj,
(mp_obj_t)&mp_const_none_obj},
};
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//| brightness: float
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//| """Float value between 0 and 1. Output brightness.
//|
//| When brightness is less than 1.0, a second buffer will be used to store the color values
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//| before they are adjusted for brightness."""
//|
STATIC mp_obj_t pixelbuf_pixelbuf_obj_get_brightness(mp_obj_t self_in) {
return mp_obj_new_float(common_hal__pixelbuf_pixelbuf_get_brightness(self_in));
}
MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_pixelbuf_get_brightness_obj, pixelbuf_pixelbuf_obj_get_brightness);
STATIC mp_obj_t pixelbuf_pixelbuf_obj_set_brightness(mp_obj_t self_in, mp_obj_t value) {
mp_float_t brightness = mp_obj_get_float(value);
if (brightness > 1) {
brightness = 1;
} else if (brightness < 0) {
brightness = 0;
}
common_hal__pixelbuf_pixelbuf_set_brightness(self_in, brightness);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(pixelbuf_pixelbuf_set_brightness_obj, pixelbuf_pixelbuf_obj_set_brightness);
const mp_obj_property_t pixelbuf_pixelbuf_brightness_obj = {
.base.type = &mp_type_property,
.proxy = {(mp_obj_t)&pixelbuf_pixelbuf_get_brightness_obj,
(mp_obj_t)&pixelbuf_pixelbuf_set_brightness_obj,
(mp_obj_t)&mp_const_none_obj},
};
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//| auto_write: bool
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//| """Whether to automatically write the pixels after each update."""
//|
STATIC mp_obj_t pixelbuf_pixelbuf_obj_get_auto_write(mp_obj_t self_in) {
return mp_obj_new_bool(common_hal__pixelbuf_pixelbuf_get_auto_write(self_in));
}
MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_pixelbuf_get_auto_write_obj, pixelbuf_pixelbuf_obj_get_auto_write);
STATIC mp_obj_t pixelbuf_pixelbuf_obj_set_auto_write(mp_obj_t self_in, mp_obj_t value) {
common_hal__pixelbuf_pixelbuf_set_auto_write(self_in, mp_obj_is_true(value));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(pixelbuf_pixelbuf_set_auto_write_obj, pixelbuf_pixelbuf_obj_set_auto_write);
const mp_obj_property_t pixelbuf_pixelbuf_auto_write_obj = {
.base.type = &mp_type_property,
.proxy = {(mp_obj_t)&pixelbuf_pixelbuf_get_auto_write_obj,
(mp_obj_t)&pixelbuf_pixelbuf_set_auto_write_obj,
(mp_obj_t)&mp_const_none_obj},
};
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//| byteorder: str
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//| """byteorder string for the buffer (read-only)"""
//|
STATIC mp_obj_t pixelbuf_pixelbuf_obj_get_byteorder(mp_obj_t self_in) {
return common_hal__pixelbuf_pixelbuf_get_byteorder_string(self_in);
}
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MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_pixelbuf_get_byteorder_str, pixelbuf_pixelbuf_obj_get_byteorder);
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const mp_obj_property_t pixelbuf_pixelbuf_byteorder_str = {
.base.type = &mp_type_property,
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.proxy = {(mp_obj_t)&pixelbuf_pixelbuf_get_byteorder_str,
(mp_obj_t)&mp_const_none_obj,
(mp_obj_t)&mp_const_none_obj},
};
STATIC mp_obj_t pixelbuf_pixelbuf_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
switch (op) {
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case MP_UNARY_OP_BOOL:
return mp_const_true;
case MP_UNARY_OP_LEN:
return MP_OBJ_NEW_SMALL_INT(common_hal__pixelbuf_pixelbuf_get_len(self_in));
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default:
return MP_OBJ_NULL; // op not supported
}
}
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//| def show(self) -> None:
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//| """Transmits the color data to the pixels so that they are shown. This is done automatically
//| when `auto_write` is True."""
//| ...
//|
STATIC mp_obj_t pixelbuf_pixelbuf_show(mp_obj_t self_in) {
common_hal__pixelbuf_pixelbuf_show(self_in);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_pixelbuf_show_obj, pixelbuf_pixelbuf_show);
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//| def fill(self, color: Union[int, Tuple[int, int, int], Tuple[int, int, int, float]]) -> None:
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//| """Fills the given pixelbuf with the given color."""
//| ...
//|
STATIC mp_obj_t pixelbuf_pixelbuf_fill(mp_obj_t self_in, mp_obj_t value) {
common_hal__pixelbuf_pixelbuf_fill(self_in, value);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pixelbuf_pixelbuf_fill_obj, pixelbuf_pixelbuf_fill);
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//| @overload
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//| def __getitem__(self, index: slice) -> Union[Tuple[Tuple[int, int, int], ...], Tuple[Tuple[int, int, int, float], ...]]: ...
//| @overload
//| def __getitem__(self, index: int) -> Union[Tuple[int, int, int], Tuple[int, int, int, float]]:
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//| """Returns the pixel value at the given index as a tuple of (Red, Green, Blue[, White]) values
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//| between 0 and 255. When in PWM (DotStar) mode, the 4th tuple value is a float of the pixel
//| intensity from 0-1.0."""
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//| ...
//|
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//| @overload
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//| def __setitem__(self, index: slice, value: Tuple[Union[int, Tuple[float, ...], List[float]], ...]) -> None: ...
//| @overload
//| def __setitem__(self, index: slice, value: List[Union[int, Tuple[float, ...], List[float]]]) -> None: ...
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//| @overload
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//| def __setitem__(self, index: int, value: Union[int, Tuple[float, ...], List[float]]) -> None:
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//| """Sets the pixel value at the given index. Value can either be a tuple or integer. Tuples are
//| The individual (Red, Green, Blue[, White]) values between 0 and 255. If given an integer, the
//| red, green and blue values are packed into the lower three bytes (0xRRGGBB).
//| For RGBW byteorders, if given only RGB values either as an int or as a tuple, the white value
//| is used instead when the red, green, and blue values are the same."""
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//| ...
//|
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STATIC mp_obj_t pixelbuf_pixelbuf_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
if (value == MP_OBJ_NULL) {
// delete item
// slice deletion
return MP_OBJ_NULL; // op not supported
}
if (0) {
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#if MICROPY_PY_BUILTINS_SLICE
} else if (mp_obj_is_type(index_in, &mp_type_slice)) {
mp_bound_slice_t slice;
size_t length = common_hal__pixelbuf_pixelbuf_get_len(self_in);
mp_seq_get_fast_slice_indexes(length, index_in, &slice);
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static mp_obj_tuple_t flat_item_tuple = {
.base = {&mp_type_tuple},
.len = 0,
.items = {
mp_const_none,
mp_const_none,
mp_const_none,
mp_const_none,
}
};
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size_t slice_len;
if (slice.step > 0) {
slice_len = slice.stop - slice.start;
} else {
slice_len = 1 + slice.start - slice.stop;
}
if (slice.step > 1 || slice.step < -1) {
size_t step = slice.step > 0 ? slice.step : slice.step * -1;
slice_len = (slice_len / step) + (slice_len % step ? 1 : 0);
}
if (value == MP_OBJ_SENTINEL) { // Get
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mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(slice_len, NULL));
for (uint i = 0; i < slice_len; i++) {
t->items[i] = common_hal__pixelbuf_pixelbuf_get_pixel(self_in, i * slice.step + slice.start);
}
return MP_OBJ_FROM_PTR(t);
} else { // Set
#if MICROPY_PY_ARRAY_SLICE_ASSIGN
size_t num_items = mp_obj_get_int(mp_obj_len(value));
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if (num_items != slice_len && num_items != (slice_len * common_hal__pixelbuf_pixelbuf_get_bpp(self_in))) {
mp_raise_ValueError_varg(translate("Unmatched number of items on RHS (expected %d, got %d)."), slice_len, num_items);
}
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common_hal__pixelbuf_pixelbuf_set_pixels(self_in, slice.start, slice.step, slice_len, value,
num_items != slice_len ? &flat_item_tuple : mp_const_none);
return mp_const_none;
#else
return MP_OBJ_NULL; // op not supported
#endif
}
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#endif
} else { // Single index rather than slice.
size_t length = common_hal__pixelbuf_pixelbuf_get_len(self_in);
size_t index = mp_get_index(mp_obj_get_type(self_in), length, index_in, false);
if (value == MP_OBJ_SENTINEL) { // Get
return common_hal__pixelbuf_pixelbuf_get_pixel(self_in, index);
} else { // Store
common_hal__pixelbuf_pixelbuf_set_pixel(self_in, index, value);
return mp_const_none;
}
}
}
STATIC const mp_rom_map_elem_t pixelbuf_pixelbuf_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_auto_write), MP_ROM_PTR(&pixelbuf_pixelbuf_auto_write_obj)},
{ MP_ROM_QSTR(MP_QSTR_bpp), MP_ROM_PTR(&pixelbuf_pixelbuf_bpp_obj)},
{ MP_ROM_QSTR(MP_QSTR_brightness), MP_ROM_PTR(&pixelbuf_pixelbuf_brightness_obj)},
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{ MP_ROM_QSTR(MP_QSTR_byteorder), MP_ROM_PTR(&pixelbuf_pixelbuf_byteorder_str)},
{ MP_ROM_QSTR(MP_QSTR_show), MP_ROM_PTR(&pixelbuf_pixelbuf_show_obj)},
{ MP_ROM_QSTR(MP_QSTR_fill), MP_ROM_PTR(&pixelbuf_pixelbuf_fill_obj)},
};
STATIC MP_DEFINE_CONST_DICT(pixelbuf_pixelbuf_locals_dict, pixelbuf_pixelbuf_locals_dict_table);
const mp_obj_type_t pixelbuf_pixelbuf_type = {
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{ &mp_type_type },
.name = MP_QSTR_PixelBuf,
.subscr = pixelbuf_pixelbuf_subscr,
.make_new = pixelbuf_pixelbuf_make_new,
.unary_op = pixelbuf_pixelbuf_unary_op,
.getiter = mp_obj_new_generic_iterator,
.print = NULL,
.locals_dict = (mp_obj_t)&pixelbuf_pixelbuf_locals_dict,
};