336 lines
13 KiB
C
336 lines
13 KiB
C
/*
|
|
* 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/objstr.h"
|
|
#include "py/objtype.h"
|
|
#include "py/runtime.h"
|
|
#include "shared-bindings/_pixelbuf/PixelBuf.h"
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
// Helper to ensure we have the native super class instead of a subclass.
|
|
static pixelbuf_pixelbuf_obj_t *native_pixelbuf(mp_obj_t pixelbuf_obj) {
|
|
mp_obj_t native_pixelbuf = mp_obj_cast_to_native_base(pixelbuf_obj, &pixelbuf_pixelbuf_type);
|
|
mp_obj_assert_native_inited(native_pixelbuf);
|
|
return MP_OBJ_TO_PTR(native_pixelbuf);
|
|
}
|
|
|
|
void common_hal__pixelbuf_pixelbuf_construct(pixelbuf_pixelbuf_obj_t *self, size_t n,
|
|
pixelbuf_byteorder_details_t *byteorder, mp_float_t brightness, bool auto_write,
|
|
uint8_t *header, size_t header_len, uint8_t *trailer, size_t trailer_len) {
|
|
|
|
self->pixel_count = n;
|
|
self->byteorder = *byteorder; // Copied because we modify for dotstar
|
|
self->bytes_per_pixel = byteorder->is_dotstar ? 4 : byteorder->bpp;
|
|
self->auto_write = false;
|
|
|
|
size_t pixel_len = self->pixel_count * self->bytes_per_pixel;
|
|
self->transmit_buffer_obj = mp_obj_new_bytes_of_zeros(header_len + pixel_len + trailer_len);
|
|
mp_obj_str_t *o = MP_OBJ_TO_PTR(self->transmit_buffer_obj);
|
|
|
|
// Abuse the bytes object a bit by mutating it's data by dropping the const. If the user's
|
|
// Python code holds onto it, they'll find out that it changes. At least this way it isn't
|
|
// mutable by the code itself.
|
|
uint8_t *transmit_buffer = (uint8_t *)o->data;
|
|
memcpy(transmit_buffer, header, header_len);
|
|
memcpy(transmit_buffer + header_len + pixel_len, trailer, trailer_len);
|
|
self->post_brightness_buffer = transmit_buffer + header_len;
|
|
|
|
if (self->byteorder.is_dotstar) {
|
|
// Initialize the buffer with the dotstar start bytes.
|
|
// Note: Header and end must be setup by caller
|
|
for (uint i = 0; i < self->pixel_count * 4; i += 4) {
|
|
self->post_brightness_buffer[i] = DOTSTAR_LED_START_FULL_BRIGHT;
|
|
}
|
|
}
|
|
// Call set_brightness so that it can allocate a second buffer if needed.
|
|
self->brightness = 1.0;
|
|
self->scaled_brightness = 0x100;
|
|
common_hal__pixelbuf_pixelbuf_set_brightness(MP_OBJ_FROM_PTR(self), brightness);
|
|
|
|
// Turn on auto_write. We don't want to do it with the above brightness call.
|
|
self->auto_write = auto_write;
|
|
}
|
|
|
|
size_t common_hal__pixelbuf_pixelbuf_get_len(mp_obj_t self_in) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
return self->pixel_count;
|
|
}
|
|
|
|
uint8_t common_hal__pixelbuf_pixelbuf_get_bpp(mp_obj_t self_in) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
return self->byteorder.bpp;
|
|
}
|
|
|
|
mp_obj_t common_hal__pixelbuf_pixelbuf_get_byteorder_string(mp_obj_t self_in) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
return self->byteorder.order_string;
|
|
}
|
|
|
|
bool common_hal__pixelbuf_pixelbuf_get_auto_write(mp_obj_t self_in) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
return self->auto_write;
|
|
}
|
|
|
|
void common_hal__pixelbuf_pixelbuf_set_auto_write(mp_obj_t self_in, bool auto_write) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
self->auto_write = auto_write;
|
|
}
|
|
|
|
mp_float_t common_hal__pixelbuf_pixelbuf_get_brightness(mp_obj_t self_in) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
return self->brightness;
|
|
}
|
|
|
|
void common_hal__pixelbuf_pixelbuf_set_brightness(mp_obj_t self_in, mp_float_t brightness) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
// Skip out if the brightness is already set. The default of self->brightness is 1.0. So, this
|
|
// also prevents the pre_brightness_buffer allocation when brightness is set to 1.0 again.
|
|
self->brightness = brightness;
|
|
// Use 256 steps of brightness so that we can do integer math below.
|
|
uint16_t new_scaled_brightness = (uint16_t)(brightness * 256);
|
|
if (new_scaled_brightness == self->scaled_brightness) {
|
|
return;
|
|
}
|
|
self->scaled_brightness = new_scaled_brightness;
|
|
size_t pixel_len = self->pixel_count * self->bytes_per_pixel;
|
|
if (self->scaled_brightness == 0x100 && !self->pre_brightness_buffer) {
|
|
return;
|
|
} else {
|
|
if (self->pre_brightness_buffer == NULL) {
|
|
self->pre_brightness_buffer = m_malloc(pixel_len, false);
|
|
memcpy(self->pre_brightness_buffer, self->post_brightness_buffer, pixel_len);
|
|
}
|
|
for (size_t i = 0; i < pixel_len; i++) {
|
|
// Don't adjust per-pixel luminance bytes in dotstar mode
|
|
if (self->byteorder.is_dotstar && i % 4 == 0) {
|
|
continue;
|
|
}
|
|
self->post_brightness_buffer[i] = (self->pre_brightness_buffer[i] * self->scaled_brightness) / 256;
|
|
}
|
|
|
|
if (self->auto_write) {
|
|
common_hal__pixelbuf_pixelbuf_show(self_in);
|
|
}
|
|
}
|
|
}
|
|
|
|
uint8_t _pixelbuf_get_as_uint8(mp_obj_t obj) {
|
|
if (mp_obj_is_small_int(obj)) {
|
|
return MP_OBJ_SMALL_INT_VALUE(obj);
|
|
} else if (mp_obj_is_int(obj)) {
|
|
return mp_obj_get_int_truncated(obj);
|
|
} else if (mp_obj_is_float(obj)) {
|
|
return (uint8_t)mp_obj_get_float(obj);
|
|
}
|
|
mp_raise_TypeError_varg(
|
|
translate("can't convert %q to %q"), mp_obj_get_type_qstr(obj), MP_QSTR_int);
|
|
}
|
|
|
|
void _pixelbuf_parse_color(pixelbuf_pixelbuf_obj_t *self, mp_obj_t color, uint8_t *r, uint8_t *g, uint8_t *b, uint8_t *w) {
|
|
pixelbuf_byteorder_details_t *byteorder = &self->byteorder;
|
|
// w is shared between white in NeoPixels and brightness in dotstars (so that DotStars can have
|
|
// per-pixel brightness). Set the defaults here in case it isn't set below.
|
|
if (byteorder->is_dotstar) {
|
|
*w = 255;
|
|
} else {
|
|
*w = 0;
|
|
}
|
|
|
|
if (mp_obj_is_int(color) || mp_obj_is_float(color)) {
|
|
mp_int_t value = mp_obj_is_int(color) ? mp_obj_get_int_truncated(color) : mp_obj_get_float(color);
|
|
*r = value >> 16 & 0xff;
|
|
*g = (value >> 8) & 0xff;
|
|
*b = value & 0xff;
|
|
} else {
|
|
mp_obj_t *items;
|
|
size_t len;
|
|
mp_obj_get_array(color, &len, &items);
|
|
if (len < 3 || len > 4) {
|
|
mp_raise_ValueError_varg(translate("Expected tuple of length %d, got %d"), byteorder->bpp, len);
|
|
}
|
|
|
|
*r = _pixelbuf_get_as_uint8(items[PIXEL_R]);
|
|
*g = _pixelbuf_get_as_uint8(items[PIXEL_G]);
|
|
*b = _pixelbuf_get_as_uint8(items[PIXEL_B]);
|
|
if (len > 3) {
|
|
if (mp_obj_is_float(items[PIXEL_W])) {
|
|
*w = 255 * mp_obj_get_float(items[PIXEL_W]);
|
|
} else {
|
|
*w = mp_obj_get_int_truncated(items[PIXEL_W]);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
// Int colors can't set white directly so convert to white when all components are equal.
|
|
// Also handles RGBW values assigned an RGB tuple.
|
|
if (!byteorder->is_dotstar && byteorder->bpp == 4 && byteorder->has_white && *r == *g && *r == *b) {
|
|
*w = *r;
|
|
*r = 0;
|
|
*g = 0;
|
|
*b = 0;
|
|
}
|
|
}
|
|
|
|
void _pixelbuf_set_pixel_color(pixelbuf_pixelbuf_obj_t *self, size_t index, uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
|
|
// DotStars don't have white, instead they have 5 bit brightness so pack it into w. Shift right
|
|
// by three to leave the top five bits.
|
|
if (self->bytes_per_pixel == 4 && self->byteorder.is_dotstar) {
|
|
w = DOTSTAR_LED_START | w >> 3;
|
|
}
|
|
pixelbuf_rgbw_t *rgbw_order = &self->byteorder.byteorder;
|
|
size_t offset = index * self->bytes_per_pixel;
|
|
uint8_t *scaled_buffer, *unscaled_buffer;
|
|
if (self->pre_brightness_buffer) {
|
|
scaled_buffer = self->post_brightness_buffer + offset;
|
|
unscaled_buffer = self->pre_brightness_buffer + offset;
|
|
} else {
|
|
scaled_buffer = NULL;
|
|
unscaled_buffer = self->post_brightness_buffer + offset;
|
|
}
|
|
|
|
if (self->bytes_per_pixel == 4) {
|
|
unscaled_buffer[rgbw_order->w] = w;
|
|
}
|
|
|
|
unscaled_buffer[rgbw_order->r] = r;
|
|
unscaled_buffer[rgbw_order->g] = g;
|
|
unscaled_buffer[rgbw_order->b] = b;
|
|
|
|
if (scaled_buffer) {
|
|
if (self->bytes_per_pixel == 4) {
|
|
if (!self->byteorder.is_dotstar) {
|
|
w = (w * self->scaled_brightness) / 256;
|
|
}
|
|
scaled_buffer[rgbw_order->w] = w;
|
|
}
|
|
scaled_buffer[rgbw_order->r] = (r * self->scaled_brightness) / 256;
|
|
scaled_buffer[rgbw_order->g] = (g * self->scaled_brightness) / 256;
|
|
scaled_buffer[rgbw_order->b] = (b * self->scaled_brightness) / 256;
|
|
}
|
|
}
|
|
|
|
void _pixelbuf_set_pixel(pixelbuf_pixelbuf_obj_t *self, size_t index, mp_obj_t value) {
|
|
uint8_t r;
|
|
uint8_t g;
|
|
uint8_t b;
|
|
uint8_t w;
|
|
_pixelbuf_parse_color(self, value, &r, &g, &b, &w);
|
|
_pixelbuf_set_pixel_color(self, index, r, g, b, w);
|
|
}
|
|
|
|
void common_hal__pixelbuf_pixelbuf_set_pixels(mp_obj_t self_in, size_t start, mp_int_t step, size_t slice_len, mp_obj_t *values,
|
|
mp_obj_tuple_t *flatten_to) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
mp_obj_iter_buf_t iter_buf;
|
|
mp_obj_t iterable = mp_getiter(values, &iter_buf);
|
|
mp_obj_t item;
|
|
size_t i = 0;
|
|
bool flattened = flatten_to != mp_const_none;
|
|
if (flattened) {
|
|
flatten_to->len = self->bytes_per_pixel;
|
|
}
|
|
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
|
|
if (flattened) {
|
|
flatten_to->items[i % self->bytes_per_pixel] = item;
|
|
if (++i % self->bytes_per_pixel == 0) {
|
|
_pixelbuf_set_pixel(self, start, flatten_to);
|
|
start += step;
|
|
}
|
|
} else {
|
|
_pixelbuf_set_pixel(self, start, item);
|
|
start += step;
|
|
}
|
|
}
|
|
if (self->auto_write) {
|
|
common_hal__pixelbuf_pixelbuf_show(self_in);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void common_hal__pixelbuf_pixelbuf_set_pixel(mp_obj_t self_in, size_t index, mp_obj_t value) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
_pixelbuf_set_pixel(self, index, value);
|
|
if (self->auto_write) {
|
|
common_hal__pixelbuf_pixelbuf_show(self_in);
|
|
}
|
|
}
|
|
|
|
mp_obj_t common_hal__pixelbuf_pixelbuf_get_pixel(mp_obj_t self_in, size_t index) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
mp_obj_t elems[self->byteorder.bpp];
|
|
uint8_t *pixel_buffer = self->post_brightness_buffer;
|
|
if (self->pre_brightness_buffer != NULL) {
|
|
pixel_buffer = self->pre_brightness_buffer;
|
|
}
|
|
pixel_buffer += self->byteorder.bpp * index;
|
|
|
|
pixelbuf_rgbw_t *rgbw_order = &self->byteorder.byteorder;
|
|
elems[0] = MP_OBJ_NEW_SMALL_INT(pixel_buffer[rgbw_order->r]);
|
|
elems[1] = MP_OBJ_NEW_SMALL_INT(pixel_buffer[rgbw_order->g]);
|
|
elems[2] = MP_OBJ_NEW_SMALL_INT(pixel_buffer[rgbw_order->b]);
|
|
if (self->byteorder.bpp > 3) {
|
|
uint8_t w = pixel_buffer[rgbw_order->w];
|
|
if (self->byteorder.is_dotstar) {
|
|
elems[3] = mp_obj_new_float((w & 0b00011111) / 31.0);
|
|
} else {
|
|
elems[3] = MP_OBJ_NEW_SMALL_INT(w);
|
|
}
|
|
}
|
|
|
|
return mp_obj_new_tuple(self->byteorder.bpp, elems);
|
|
}
|
|
|
|
void common_hal__pixelbuf_pixelbuf_show(mp_obj_t self_in) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
mp_obj_t dest[2 + 1];
|
|
mp_load_method(self_in, MP_QSTR__transmit, dest);
|
|
|
|
dest[2] = self->transmit_buffer_obj;
|
|
|
|
mp_call_method_n_kw(1, 0, dest);
|
|
}
|
|
|
|
void common_hal__pixelbuf_pixelbuf_fill(mp_obj_t self_in, mp_obj_t fill_color) {
|
|
pixelbuf_pixelbuf_obj_t *self = native_pixelbuf(self_in);
|
|
|
|
uint8_t r;
|
|
uint8_t g;
|
|
uint8_t b;
|
|
uint8_t w;
|
|
_pixelbuf_parse_color(self, fill_color, &r, &g, &b, &w);
|
|
|
|
for (size_t i = 0; i < self->pixel_count; i++) {
|
|
_pixelbuf_set_pixel_color(self, i, r, g, b, w);
|
|
}
|
|
if (self->auto_write) {
|
|
common_hal__pixelbuf_pixelbuf_show(self_in);
|
|
}
|
|
}
|