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fb2a57800a
circuitpython/ports/nrf/boards/microbit/modules/microbitimage.c
Jim Mussared fb2a57800a all: Simplify buffer protocol to just a "get buffer" callback. 
The buffer protocol type only has a single member, and this existing layout
creates problems for the upcoming split/slot-index mp_obj_type_t layout
optimisations.

If we need to make the buffer protocol more sophisticated in the future
either we can rely on the mp_obj_type_t optimisations to just add
additional slots to mp_obj_type_t or re-visit the buffer protocol then.

This change is a no-op in terms of generated code.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2022-09-19 18:40:39 +10:00

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Damien George, Mark Shannon
*
* 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 <string.h>
#include "py/runtime.h"
#include "microbitimage.h"
#include "microbitconstimage.h"
#include "py/runtime0.h"
#include "microbitfont.h"
#define min(a,b) (((a)<(b))?(a):(b))
#define max(a,b) (((a)>(b))?(a):(b))
const monochrome_5by5_t microbit_blank_image = {
{ &microbit_image_type },
1, 0, 0, 0,
{ 0, 0, 0 }
};
STATIC void microbit_image_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
mp_printf(print, "Image(");
if (kind == PRINT_STR)
mp_printf(print, "\n ");
mp_printf(print, "'");
for (int y = 0; y < imageHeight(self); ++y) {
for (int x = 0; x < imageWidth(self); ++x) {
mp_printf(print, "%c", "0123456789"[imageGetPixelValue(self, x, y)]);
}
mp_printf(print, ":");
if (kind == PRINT_STR && y < imageHeight(self)-1)
mp_printf(print, "'\n '");
}
mp_printf(print, "'");
if (kind == PRINT_STR)
mp_printf(print, "\n");
mp_printf(print, ")");
}
uint8_t monochromeGetPixelValue(monochrome_5by5_t * p_mono, mp_int_t x, mp_int_t y) {
unsigned int index = y*5+x;
if (index == 24)
return p_mono->pixel44;
return (p_mono->bits24[index>>3] >> (index&7))&1;
}
uint8_t greyscaleGetPixelValue(greyscale_t * p_greyscale, mp_int_t x, mp_int_t y) {
unsigned int index = y*p_greyscale->width+x;
unsigned int shift = ((index<<2)&4);
return (p_greyscale->byte_data[index>>1] >> shift)&15;
}
void greyscaleSetPixelValue(greyscale_t * p_greyscale, mp_int_t x, mp_int_t y, mp_int_t val) {
unsigned int index = y*p_greyscale->width+x;
unsigned int shift = ((index<<2)&4);
uint8_t mask = 240 >> shift;
p_greyscale->byte_data[index>>1] = (p_greyscale->byte_data[index>>1] & mask) | (val << shift);
}
void greyscaleFill(greyscale_t * p_greyscale, mp_int_t val) {
mp_int_t byte = (val<<4) | val;
for (int i = 0; i < ((p_greyscale->width*p_greyscale->height+1)>>1); i++) {
p_greyscale->byte_data[i] = byte;
}
}
void greyscaleClear(greyscale_t * p_greyscale) {
memset(&p_greyscale->byte_data, 0, (p_greyscale->width*p_greyscale->height+1)>>1);
}
uint8_t imageGetPixelValue(microbit_image_obj_t * p_image, mp_int_t x, mp_int_t y) {
if (p_image->base.five)
return monochromeGetPixelValue(&p_image->monochrome_5by5, x, y)*MAX_BRIGHTNESS;
else
return greyscaleGetPixelValue(&p_image->greyscale, x, y);
}
mp_int_t imageWidth(microbit_image_obj_t * p_image) {
if (p_image->base.five)
return 5;
else
return p_image->greyscale.width;
}
mp_int_t imageHeight(microbit_image_obj_t * p_image) {
if (p_image->base.five)
return 5;
else
return p_image->greyscale.height;
}
STATIC greyscale_t *greyscale_new(mp_int_t w, mp_int_t h) {
greyscale_t *result = mp_obj_malloc_var(greyscale_t, uint8_t, (w*h+1)>>1, &microbit_image_type);
result->five = 0;
result->width = w;
result->height = h;
return result;
}
greyscale_t * imageCopy(microbit_image_obj_t * p_image) {
mp_int_t w = imageWidth(p_image);
mp_int_t h = imageHeight(p_image);
greyscale_t *result = greyscale_new(w, h);
for (mp_int_t y = 0; y < h; y++) {
for (mp_int_t x = 0; x < w; ++x) {
greyscaleSetPixelValue(result, x,y, imageGetPixelValue(p_image, x,y));
}
}
return result;
}
greyscale_t * imageInvert(microbit_image_obj_t * p_image) {
mp_int_t w = imageWidth(p_image);
mp_int_t h = imageHeight(p_image);
greyscale_t *result = greyscale_new(w, h);
for (mp_int_t y = 0; y < h; y++) {
for (mp_int_t x = 0; x < w; ++x) {
greyscaleSetPixelValue(result, x,y, MAX_BRIGHTNESS - imageGetPixelValue(p_image, x,y));
}
}
return result;
}
STATIC microbit_image_obj_t *image_from_parsed_str(const char *s, mp_int_t len) {
mp_int_t w = 0;
mp_int_t h = 0;
mp_int_t line_len = 0;
greyscale_t *result;
/*First pass -- Establish metadata */
for (int i = 0; i < len; i++) {
char c = s[i];
if (c == '\n' || c == ':') {
w = max(line_len, w);
line_len = 0;
++h;
} else if (c == ' ') {
++line_len;
} else if ('c' >= '0' && c <= '9') {
++line_len;
} else {
mp_raise_ValueError(MP_ERROR_TEXT("Unexpected character in Image definition."));
}
}
if (line_len) {
// Omitted trailing terminator
++h;
w = max(line_len, w);
}
result = greyscale_new(w, h);
mp_int_t x = 0;
mp_int_t y = 0;
/* Second pass -- Fill in data */
for (int i = 0; i < len; i++) {
char c = s[i];
if (c == '\n' || c == ':') {
while (x < w) {
greyscaleSetPixelValue(result, x, y, 0);
x++;
}
++y;
x = 0;
} else if (c == ' ') {
/* Treat spaces as 0 */
greyscaleSetPixelValue(result, x, y, 0);
++x;
} else if ('c' >= '0' && c <= '9') {
greyscaleSetPixelValue(result, x, y, c - '0');
++x;
}
}
if (y < h) {
while (x < w) {
greyscaleSetPixelValue(result, x, y, 0);
x++;
}
}
return (microbit_image_obj_t *)result;
}
STATIC mp_obj_t microbit_image_make_new(const mp_obj_type_t *type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
(void)type_in;
mp_arg_check_num(n_args, n_kw, 0, 3, false);
switch (n_args) {
case 0: {
greyscale_t *image = greyscale_new(5, 5);
greyscaleClear(image);
return image;
}
case 1: {
if (mp_obj_is_str(args[0])) {
// arg is a string object
size_t len;
const char *str = mp_obj_str_get_data(args[0], &len);
// make image from string
if (len == 1) {
/* For a single charater, return the font glyph */
return microbit_image_for_char(str[0]);
} else {
/* Otherwise parse the image description string */
return image_from_parsed_str(str, len);
}
} else {
mp_raise_TypeError(MP_ERROR_TEXT("Image(s) takes a string."));
}
}
case 2:
case 3: {
mp_int_t w = mp_obj_get_int(args[0]);
mp_int_t h = mp_obj_get_int(args[1]);
greyscale_t *image = greyscale_new(w, h);
if (n_args == 2) {
greyscaleClear(image);
} else {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_READ);
if (w < 0 || h < 0 || (size_t)(w * h) != bufinfo.len) {
mp_raise_ValueError(MP_ERROR_TEXT("image data is incorrect size"));
}
mp_int_t i = 0;
for (mp_int_t y = 0; y < h; y++) {
for (mp_int_t x = 0; x < w; ++x) {
uint8_t val = min(((const uint8_t*)bufinfo.buf)[i], MAX_BRIGHTNESS);
greyscaleSetPixelValue(image, x, y, val);
++i;
}
}
}
return image;
}
default: {
mp_raise_TypeError(MP_ERROR_TEXT("Image() takes 0 to 3 arguments"));
}
}
}
static void clear_rect(greyscale_t *img, mp_int_t x0, mp_int_t y0,mp_int_t x1, mp_int_t y1) {
for (int i = x0; i < x1; ++i) {
for (int j = y0; j < y1; ++j) {
greyscaleSetPixelValue(img, i, j, 0);
}
}
}
STATIC void image_blit(microbit_image_obj_t *src, greyscale_t *dest, mp_int_t x, mp_int_t y, mp_int_t w, mp_int_t h, mp_int_t xdest, mp_int_t ydest) {
if (w < 0)
w = 0;
if (h < 0)
h = 0;
mp_int_t intersect_x0 = max(max(0, x), -xdest);
mp_int_t intersect_y0 = max(max(0, y), -ydest);
mp_int_t intersect_x1 = min(min(dest->width+x-xdest, imageWidth(src)), x+w);
mp_int_t intersect_y1 = min(min(dest->height+y-ydest, imageHeight(src)), y+h);
mp_int_t xstart, xend, ystart, yend, xdel, ydel;
mp_int_t clear_x0 = max(0, xdest);
mp_int_t clear_y0 = max(0, ydest);
mp_int_t clear_x1 = min(dest->width, xdest+w);
mp_int_t clear_y1 = min(dest->height, ydest+h);
if (intersect_x0 >= intersect_x1 || intersect_y0 >= intersect_y1) {
// Nothing to copy
clear_rect(dest, clear_x0, clear_y0, clear_x1, clear_y1);
return;
}
if (x > xdest) {
xstart = intersect_x0; xend = intersect_x1; xdel = 1;
} else {
xstart = intersect_x1-1; xend = intersect_x0-1; xdel = -1;
}
if (y > ydest) {
ystart = intersect_y0; yend = intersect_y1; ydel = 1;
} else {
ystart = intersect_y1-1; yend = intersect_y0-1; ydel = -1;
}
for (int i = xstart; i != xend; i += xdel) {
for (int j = ystart; j != yend; j += ydel) {
int val = imageGetPixelValue(src, i, j);
greyscaleSetPixelValue(dest, i+xdest-x, j+ydest-y, val);
}
}
// Adjust intersection rectange to dest
intersect_x0 += xdest-x;
intersect_y0 += ydest-y;
intersect_x1 += xdest-x;
intersect_y1 += ydest-y;
// Clear four rectangles in the cleared area surrounding the copied area.
clear_rect(dest, clear_x0, clear_y0, intersect_x0, intersect_y1);
clear_rect(dest, clear_x0, intersect_y1, intersect_x1, clear_y1);
clear_rect(dest, intersect_x1, intersect_y0, clear_x1, clear_y1);
clear_rect(dest, intersect_x0, clear_y0, clear_x1, intersect_y0);
}
greyscale_t *image_shift(microbit_image_obj_t *self, mp_int_t x, mp_int_t y) {
greyscale_t *result = greyscale_new(imageWidth(self), imageWidth(self));
image_blit(self, result, x, y, imageWidth(self), imageWidth(self), 0, 0);
return result;
}
STATIC microbit_image_obj_t *image_crop(microbit_image_obj_t *img, mp_int_t x, mp_int_t y, mp_int_t w, mp_int_t h) {
if (w < 0)
w = 0;
if (h < 0)
h = 0;
greyscale_t *result = greyscale_new(w, h);
image_blit(img, result, x, y, w, h, 0, 0);
return (microbit_image_obj_t *)result;
}
mp_obj_t microbit_image_width(mp_obj_t self_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
return MP_OBJ_NEW_SMALL_INT(imageWidth(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(microbit_image_width_obj, microbit_image_width);
mp_obj_t microbit_image_height(mp_obj_t self_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
return MP_OBJ_NEW_SMALL_INT(imageHeight(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(microbit_image_height_obj, microbit_image_height);
mp_obj_t microbit_image_get_pixel(mp_obj_t self_in, mp_obj_t x_in, mp_obj_t y_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
mp_int_t x = mp_obj_get_int(x_in);
mp_int_t y = mp_obj_get_int(y_in);
if (x < 0 || y < 0) {
mp_raise_ValueError(MP_ERROR_TEXT("index can't be negative"));
}
if (x < imageWidth(self) && y < imageHeight(self)) {
return MP_OBJ_NEW_SMALL_INT(imageGetPixelValue(self, x, y));
}
mp_raise_ValueError(MP_ERROR_TEXT("index too large"));
}
MP_DEFINE_CONST_FUN_OBJ_3(microbit_image_get_pixel_obj, microbit_image_get_pixel);
/* Raise an exception if not mutable */
static void check_mutability(microbit_image_obj_t *self) {
if (self->base.five) {
mp_raise_TypeError(MP_ERROR_TEXT("image can't be modified (try copying first)"));
}
}
mp_obj_t microbit_image_set_pixel(mp_uint_t n_args, const mp_obj_t *args) {
(void)n_args;
microbit_image_obj_t *self = (microbit_image_obj_t*)args[0];
check_mutability(self);
mp_int_t x = mp_obj_get_int(args[1]);
mp_int_t y = mp_obj_get_int(args[2]);
if (x < 0 || y < 0) {
mp_raise_ValueError(MP_ERROR_TEXT("index can't be negative"));
}
mp_int_t bright = mp_obj_get_int(args[3]);
if (bright < 0 || bright > MAX_BRIGHTNESS)
mp_raise_ValueError(MP_ERROR_TEXT("brightness out of bounds."));
if (x < imageWidth(self) && y < imageHeight(self)) {
greyscaleSetPixelValue(&(self->greyscale), x, y, bright);
return mp_const_none;
}
mp_raise_ValueError(MP_ERROR_TEXT("index too large"));
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(microbit_image_set_pixel_obj, 4, 4, microbit_image_set_pixel);
mp_obj_t microbit_image_fill(mp_obj_t self_in, mp_obj_t n_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
check_mutability(self);
mp_int_t n = mp_obj_get_int(n_in);
if (n < 0 || n > MAX_BRIGHTNESS) {
mp_raise_ValueError(MP_ERROR_TEXT("brightness out of bounds."));
}
greyscaleFill(&self->greyscale, n);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(microbit_image_fill_obj, microbit_image_fill);
mp_obj_t microbit_image_blit(mp_uint_t n_args, const mp_obj_t *args) {
microbit_image_obj_t *self = (microbit_image_obj_t*)args[0];
check_mutability(self);
mp_obj_t src = args[1];
if (mp_obj_get_type(src) != &microbit_image_type) {
mp_raise_TypeError(MP_ERROR_TEXT("expecting an image"));
}
if (n_args == 7) {
mp_raise_TypeError(MP_ERROR_TEXT("must specify both offsets"));
}
mp_int_t x = mp_obj_get_int(args[2]);
mp_int_t y = mp_obj_get_int(args[3]);
mp_int_t w = mp_obj_get_int(args[4]);
mp_int_t h = mp_obj_get_int(args[5]);
if (w < 0 || h < 0) {
mp_raise_ValueError(MP_ERROR_TEXT("size can't be negative"));
}
mp_int_t xdest;
mp_int_t ydest;
if (n_args == 6) {
xdest = 0;
ydest = 0;
} else {
xdest = mp_obj_get_int(args[6]);
ydest = mp_obj_get_int(args[7]);
}
image_blit((microbit_image_obj_t *)src, &(self->greyscale), x, y, w, h, xdest, ydest);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(microbit_image_blit_obj, 6, 8, microbit_image_blit);
mp_obj_t microbit_image_crop(mp_uint_t n_args, const mp_obj_t *args) {
(void)n_args;
microbit_image_obj_t *self = (microbit_image_obj_t*)args[0];
mp_int_t x0 = mp_obj_get_int(args[1]);
mp_int_t y0 = mp_obj_get_int(args[2]);
mp_int_t x1 = mp_obj_get_int(args[3]);
mp_int_t y1 = mp_obj_get_int(args[4]);
return image_crop(self, x0, y0, x1, y1);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(microbit_image_crop_obj, 5, 5, microbit_image_crop);
mp_obj_t microbit_image_shift_left(mp_obj_t self_in, mp_obj_t n_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
mp_int_t n = mp_obj_get_int(n_in);
return image_shift(self, n, 0);
}
MP_DEFINE_CONST_FUN_OBJ_2(microbit_image_shift_left_obj, microbit_image_shift_left);
mp_obj_t microbit_image_shift_right(mp_obj_t self_in, mp_obj_t n_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
mp_int_t n = mp_obj_get_int(n_in);
return image_shift(self, -n, 0);
}
MP_DEFINE_CONST_FUN_OBJ_2(microbit_image_shift_right_obj, microbit_image_shift_right);
mp_obj_t microbit_image_shift_up(mp_obj_t self_in, mp_obj_t n_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
mp_int_t n = mp_obj_get_int(n_in);
return image_shift(self, 0, n);
}
MP_DEFINE_CONST_FUN_OBJ_2(microbit_image_shift_up_obj, microbit_image_shift_up);
mp_obj_t microbit_image_shift_down(mp_obj_t self_in, mp_obj_t n_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
mp_int_t n = mp_obj_get_int(n_in);
return image_shift(self, 0, -n);
}
MP_DEFINE_CONST_FUN_OBJ_2(microbit_image_shift_down_obj, microbit_image_shift_down);
mp_obj_t microbit_image_copy(mp_obj_t self_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
return imageCopy(self);
}
MP_DEFINE_CONST_FUN_OBJ_1(microbit_image_copy_obj, microbit_image_copy);
mp_obj_t microbit_image_invert(mp_obj_t self_in) {
microbit_image_obj_t *self = (microbit_image_obj_t*)self_in;
return imageInvert(self);
}
MP_DEFINE_CONST_FUN_OBJ_1(microbit_image_invert_obj, microbit_image_invert);
STATIC const mp_rom_map_elem_t microbit_image_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_width), MP_ROM_PTR(&microbit_image_width_obj) },
{ MP_ROM_QSTR(MP_QSTR_height), MP_ROM_PTR(&microbit_image_height_obj) },
{ MP_ROM_QSTR(MP_QSTR_get_pixel), MP_ROM_PTR(&microbit_image_get_pixel_obj) },
{ MP_ROM_QSTR(MP_QSTR_set_pixel), MP_ROM_PTR(&microbit_image_set_pixel_obj) },
{ MP_ROM_QSTR(MP_QSTR_shift_left), MP_ROM_PTR(&microbit_image_shift_left_obj) },
{ MP_ROM_QSTR(MP_QSTR_shift_right), MP_ROM_PTR(&microbit_image_shift_right_obj) },
{ MP_ROM_QSTR(MP_QSTR_shift_up), MP_ROM_PTR(&microbit_image_shift_up_obj) },
{ MP_ROM_QSTR(MP_QSTR_shift_down), MP_ROM_PTR(&microbit_image_shift_down_obj) },
{ MP_ROM_QSTR(MP_QSTR_copy), MP_ROM_PTR(&microbit_image_copy_obj) },
{ MP_ROM_QSTR(MP_QSTR_crop), MP_ROM_PTR(&microbit_image_crop_obj) },
{ MP_ROM_QSTR(MP_QSTR_invert), MP_ROM_PTR(&microbit_image_invert_obj) },
{ MP_ROM_QSTR(MP_QSTR_fill), MP_ROM_PTR(&microbit_image_fill_obj) },
{ MP_ROM_QSTR(MP_QSTR_blit), MP_ROM_PTR(&microbit_image_blit_obj) },
{ MP_ROM_QSTR(MP_QSTR_HEART), MP_ROM_PTR(&microbit_const_image_heart_obj) },
{ MP_ROM_QSTR(MP_QSTR_HEART_SMALL), MP_ROM_PTR(&microbit_const_image_heart_small_obj) },
{ MP_ROM_QSTR(MP_QSTR_HAPPY), MP_ROM_PTR(&microbit_const_image_happy_obj) },
{ MP_ROM_QSTR(MP_QSTR_SMILE), MP_ROM_PTR(&microbit_const_image_smile_obj) },
{ MP_ROM_QSTR(MP_QSTR_SAD), MP_ROM_PTR(&microbit_const_image_sad_obj) },
{ MP_ROM_QSTR(MP_QSTR_CONFUSED), MP_ROM_PTR(&microbit_const_image_confused_obj) },
{ MP_ROM_QSTR(MP_QSTR_ANGRY), MP_ROM_PTR(&microbit_const_image_angry_obj) },
{ MP_ROM_QSTR(MP_QSTR_ASLEEP), MP_ROM_PTR(&microbit_const_image_asleep_obj) },
{ MP_ROM_QSTR(MP_QSTR_SURPRISED), MP_ROM_PTR(&microbit_const_image_surprised_obj) },
{ MP_ROM_QSTR(MP_QSTR_SILLY), MP_ROM_PTR(&microbit_const_image_silly_obj) },
{ MP_ROM_QSTR(MP_QSTR_FABULOUS), MP_ROM_PTR(&microbit_const_image_fabulous_obj) },
{ MP_ROM_QSTR(MP_QSTR_MEH), MP_ROM_PTR(&microbit_const_image_meh_obj) },
{ MP_ROM_QSTR(MP_QSTR_YES), MP_ROM_PTR(&microbit_const_image_yes_obj) },
{ MP_ROM_QSTR(MP_QSTR_NO), MP_ROM_PTR(&microbit_const_image_no_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK12), MP_ROM_PTR(&microbit_const_image_clock12_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK1), MP_ROM_PTR(&microbit_const_image_clock1_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK2), MP_ROM_PTR(&microbit_const_image_clock2_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK3), MP_ROM_PTR(&microbit_const_image_clock3_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK4), MP_ROM_PTR(&microbit_const_image_clock4_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK5), MP_ROM_PTR(&microbit_const_image_clock5_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK6), MP_ROM_PTR(&microbit_const_image_clock6_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK7), MP_ROM_PTR(&microbit_const_image_clock7_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK8), MP_ROM_PTR(&microbit_const_image_clock8_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK9), MP_ROM_PTR(&microbit_const_image_clock9_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK10), MP_ROM_PTR(&microbit_const_image_clock10_obj) },
{ MP_ROM_QSTR(MP_QSTR_CLOCK11), MP_ROM_PTR(&microbit_const_image_clock11_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_N), MP_ROM_PTR(&microbit_const_image_arrow_n_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_NE), MP_ROM_PTR(&microbit_const_image_arrow_ne_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_E), MP_ROM_PTR(&microbit_const_image_arrow_e_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_SE), MP_ROM_PTR(&microbit_const_image_arrow_se_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_S), MP_ROM_PTR(&microbit_const_image_arrow_s_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_SW), MP_ROM_PTR(&microbit_const_image_arrow_sw_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_W), MP_ROM_PTR(&microbit_const_image_arrow_w_obj) },
{ MP_ROM_QSTR(MP_QSTR_ARROW_NW), MP_ROM_PTR(&microbit_const_image_arrow_nw_obj) },
{ MP_ROM_QSTR(MP_QSTR_TRIANGLE), MP_ROM_PTR(&microbit_const_image_triangle_obj) },
{ MP_ROM_QSTR(MP_QSTR_TRIANGLE_LEFT), MP_ROM_PTR(&microbit_const_image_triangle_left_obj) },
{ MP_ROM_QSTR(MP_QSTR_CHESSBOARD), MP_ROM_PTR(&microbit_const_image_chessboard_obj) },
{ MP_ROM_QSTR(MP_QSTR_DIAMOND), MP_ROM_PTR(&microbit_const_image_diamond_obj) },
{ MP_ROM_QSTR(MP_QSTR_DIAMOND_SMALL), MP_ROM_PTR(&microbit_const_image_diamond_small_obj) },
{ MP_ROM_QSTR(MP_QSTR_SQUARE), MP_ROM_PTR(&microbit_const_image_square_obj) },
{ MP_ROM_QSTR(MP_QSTR_SQUARE_SMALL), MP_ROM_PTR(&microbit_const_image_square_small_obj) },
{ MP_ROM_QSTR(MP_QSTR_RABBIT), MP_ROM_PTR(&microbit_const_image_rabbit) },
{ MP_ROM_QSTR(MP_QSTR_COW), MP_ROM_PTR(&microbit_const_image_cow) },
{ MP_ROM_QSTR(MP_QSTR_MUSIC_CROTCHET), MP_ROM_PTR(&microbit_const_image_music_crotchet_obj) },
{ MP_ROM_QSTR(MP_QSTR_MUSIC_QUAVER), MP_ROM_PTR(&microbit_const_image_music_quaver_obj) },
{ MP_ROM_QSTR(MP_QSTR_MUSIC_QUAVERS), MP_ROM_PTR(&microbit_const_image_music_quavers_obj) },
{ MP_ROM_QSTR(MP_QSTR_PITCHFORK), MP_ROM_PTR(&microbit_const_image_pitchfork_obj) },
{ MP_ROM_QSTR(MP_QSTR_XMAS), MP_ROM_PTR(&microbit_const_image_xmas_obj) },
{ MP_ROM_QSTR(MP_QSTR_PACMAN), MP_ROM_PTR(&microbit_const_image_pacman_obj) },
{ MP_ROM_QSTR(MP_QSTR_TARGET), MP_ROM_PTR(&microbit_const_image_target_obj) },
{ MP_ROM_QSTR(MP_QSTR_ALL_CLOCKS), MP_ROM_PTR(&microbit_const_image_all_clocks_tuple_obj) },
{ MP_ROM_QSTR(MP_QSTR_ALL_ARROWS), MP_ROM_PTR(&microbit_const_image_all_arrows_tuple_obj) },
{ MP_ROM_QSTR(MP_QSTR_TSHIRT), MP_ROM_PTR(&microbit_const_image_tshirt_obj) },
{ MP_ROM_QSTR(MP_QSTR_ROLLERSKATE), MP_ROM_PTR(&microbit_const_image_rollerskate_obj) },
{ MP_ROM_QSTR(MP_QSTR_DUCK), MP_ROM_PTR(&microbit_const_image_duck_obj) },
{ MP_ROM_QSTR(MP_QSTR_HOUSE), MP_ROM_PTR(&microbit_const_image_house_obj) },
{ MP_ROM_QSTR(MP_QSTR_TORTOISE), MP_ROM_PTR(&microbit_const_image_tortoise_obj) },
{ MP_ROM_QSTR(MP_QSTR_BUTTERFLY), MP_ROM_PTR(&microbit_const_image_butterfly_obj) },
{ MP_ROM_QSTR(MP_QSTR_STICKFIGURE), MP_ROM_PTR(&microbit_const_image_stickfigure_obj) },
{ MP_ROM_QSTR(MP_QSTR_GHOST), MP_ROM_PTR(&microbit_const_image_ghost_obj) },
{ MP_ROM_QSTR(MP_QSTR_SWORD), MP_ROM_PTR(&microbit_const_image_sword_obj) },
{ MP_ROM_QSTR(MP_QSTR_GIRAFFE), MP_ROM_PTR(&microbit_const_image_giraffe_obj) },
{ MP_ROM_QSTR(MP_QSTR_SKULL), MP_ROM_PTR(&microbit_const_image_skull_obj) },
{ MP_ROM_QSTR(MP_QSTR_UMBRELLA), MP_ROM_PTR(&microbit_const_image_umbrella_obj) },
{ MP_ROM_QSTR(MP_QSTR_SNAKE), MP_ROM_PTR(&microbit_const_image_snake_obj) },
};
STATIC MP_DEFINE_CONST_DICT(microbit_image_locals_dict, microbit_image_locals_dict_table);
#define THE_FONT font_pendolino3_5x5_pad3msb
#define ASCII_START 32
#define ASCII_END 126
STATIC const unsigned char *get_font_data_from_char(char c) {
if (c < ASCII_START || c > ASCII_END) {
c = '?';
}
int offset = (c-ASCII_START) * 5;
return THE_FONT + offset;
}
STATIC mp_int_t get_pixel_from_font_data(const unsigned char *data, int x, int y) {
/* The following logic belongs in MicroBitFont */
return ((data[y]>>(4-x))&1);
}
void microbit_image_set_from_char(greyscale_t *img, char c) {
const unsigned char *data = get_font_data_from_char(c);
for (int x = 0; x < 5; ++x) {
for (int y = 0; y < 5; ++y) {
greyscaleSetPixelValue(img, x, y, get_pixel_from_font_data(data, x, y)*MAX_BRIGHTNESS);
}
}
}
microbit_image_obj_t *microbit_image_for_char(char c) {
greyscale_t *result = greyscale_new(5,5);
microbit_image_set_from_char(result, c);
return (microbit_image_obj_t *)result;
}
#if MICROPY_PY_BUILTINS_FLOAT
microbit_image_obj_t *microbit_image_dim(microbit_image_obj_t *lhs, mp_float_t fval) {
#else
microbit_image_obj_t *microbit_image_dim(microbit_image_obj_t *lhs, mp_int_t fval) {
#endif
if (fval < 0)
mp_raise_ValueError(MP_ERROR_TEXT("Brightness multiplier must not be negative."));
greyscale_t *result = greyscale_new(imageWidth(lhs), imageHeight(lhs));
for (int x = 0; x < imageWidth(lhs); ++x) {
for (int y = 0; y < imageWidth(lhs); ++y) {
#if MICROPY_PY_BUILTINS_FLOAT
int val = min((int)imageGetPixelValue(lhs, x,y)*fval+0.5, MAX_BRIGHTNESS);
#else
int val = min((int)imageGetPixelValue(lhs, x,y)*fval, MAX_BRIGHTNESS);
#endif
greyscaleSetPixelValue(result, x, y, val);
}
}
return (microbit_image_obj_t *)result;
}
microbit_image_obj_t *microbit_image_sum(microbit_image_obj_t *lhs, microbit_image_obj_t *rhs, bool add) {
mp_int_t h = imageHeight(lhs);
mp_int_t w = imageWidth(lhs);
if (imageHeight(rhs) != h || imageWidth(lhs) != w) {
// TODO: verify that image width in test above should really test (lhs != w)
mp_raise_ValueError(MP_ERROR_TEXT("Images must be the same size."));
}
greyscale_t *result = greyscale_new(w, h);
for (int x = 0; x < w; ++x) {
for (int y = 0; y < h; ++y) {
int val;
int lval = imageGetPixelValue(lhs, x,y);
int rval = imageGetPixelValue(rhs, x,y);
if (add)
val = min(lval + rval, MAX_BRIGHTNESS);
else
val = max(0, lval - rval);
greyscaleSetPixelValue(result, x, y, val);
}
}
return (microbit_image_obj_t *)result;
}
STATIC mp_obj_t image_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
if (mp_obj_get_type(lhs_in) != &microbit_image_type) {
return MP_OBJ_NULL; // op not supported
}
microbit_image_obj_t *lhs = (microbit_image_obj_t *)lhs_in;
switch(op) {
case MP_BINARY_OP_ADD:
case MP_BINARY_OP_SUBTRACT:
break;
case MP_BINARY_OP_MULTIPLY:
#if MICROPY_PY_BUILTINS_FLOAT
return microbit_image_dim(lhs, mp_obj_get_float(rhs_in));
#else
return microbit_image_dim(lhs, mp_obj_get_int(rhs_in) * 10);
#endif
case MP_BINARY_OP_TRUE_DIVIDE:
#if MICROPY_PY_BUILTINS_FLOAT
return microbit_image_dim(lhs, 1.0/mp_obj_get_float(rhs_in));
#else
break;
case MP_BINARY_OP_FLOOR_DIVIDE:
return microbit_image_dim(lhs, (100/mp_obj_get_int(rhs_in) + 5) / 10);
#endif
default:
return MP_OBJ_NULL; // op not supported
}
if (mp_obj_get_type(rhs_in) != &microbit_image_type) {
return MP_OBJ_NULL; // op not supported
}
return microbit_image_sum(lhs, (microbit_image_obj_t *)rhs_in, op == MP_BINARY_OP_ADD);
}
const mp_obj_type_t microbit_image_type = {
{ &mp_type_type },
.name = MP_QSTR_MicroBitImage,
.print = microbit_image_print,
.make_new = microbit_image_make_new,
.call = NULL,
.unary_op = NULL,
.binary_op = image_binary_op,
.attr = NULL,
.subscr = NULL,
.getiter = NULL,
.iternext = NULL,
.locals_dict = (mp_obj_dict_t*)&microbit_image_locals_dict,
};
typedef struct _scrolling_string_t {
mp_obj_base_t base;
char const *str;
mp_uint_t len;
mp_obj_t ref;
bool monospace;
bool repeat;
} scrolling_string_t;
typedef struct _scrolling_string_iterator_t {
mp_obj_base_t base;
mp_obj_t ref;
greyscale_t *img;
char const *next_char;
char const *start;
char const *end;
uint8_t offset;
uint8_t offset_limit;
bool monospace;
bool repeat;
char right;
} scrolling_string_iterator_t;
extern const mp_obj_type_t microbit_scrolling_string_type;
extern const mp_obj_type_t microbit_scrolling_string_iterator_type;
mp_obj_t scrolling_string_image_iterable(const char* str, mp_uint_t len, mp_obj_t ref, bool monospace, bool repeat) {
scrolling_string_t *result = mp_obj_malloc(scrolling_string_t, &microbit_scrolling_string_type);
result->str = str;
result->len = len;
result->ref = ref;
result->monospace = monospace;
result->repeat = repeat;
return result;
}
STATIC int font_column_non_blank(const unsigned char *font_data, unsigned int col) {
for (int y = 0; y < 5; ++y) {
if (get_pixel_from_font_data(font_data, col, y)) {
return 1;
}
}
return 0;
}
/* Not strictly the rightmost non-blank column, but the rightmost in columns 2,3 or 4. */
STATIC unsigned int rightmost_non_blank_column(const unsigned char *font_data) {
if (font_column_non_blank(font_data, 4)) {
return 4;
}
if (font_column_non_blank(font_data, 3)) {
return 3;
}
return 2;
}
static void restart(scrolling_string_iterator_t *iter) {
iter->next_char = iter->start;
iter->offset = 0;
if (iter->start < iter->end) {
iter->right = *iter->next_char;
if (iter->monospace) {
iter->offset_limit = 5;
} else {
iter->offset_limit = rightmost_non_blank_column(get_font_data_from_char(iter->right)) + 1;
}
} else {
iter->right = ' ';
iter->offset_limit = 5;
}
}
STATIC mp_obj_t get_microbit_scrolling_string_iter(mp_obj_t o_in, mp_obj_iter_buf_t *iter_buf) {
(void)iter_buf;
scrolling_string_t *str = (scrolling_string_t *)o_in;
scrolling_string_iterator_t *result = mp_obj_malloc(scrolling_string_iterator_t, &microbit_scrolling_string_iterator_type);
result->img = greyscale_new(5,5);
result->start = str->str;
result->ref = str->ref;
result->monospace = str->monospace;
result->end = result->start + str->len;
result->repeat = str->repeat;
restart(result);
return result;
}
STATIC mp_obj_t microbit_scrolling_string_iter_next(mp_obj_t o_in) {
scrolling_string_iterator_t *iter = (scrolling_string_iterator_t *)o_in;
if (iter->next_char == iter->end && iter->offset == 5) {
if (iter->repeat) {
restart(iter);
greyscaleClear(iter->img);
} else {
return MP_OBJ_STOP_ITERATION;
}
}
for (int x = 0; x < 4; x++) {
for (int y = 0; y < 5; y++) {
greyscaleSetPixelValue(iter->img, x, y, greyscaleGetPixelValue(iter->img, x+1, y));
}
}
for (int y = 0; y < 5; y++) {
greyscaleSetPixelValue(iter->img, 4, y, 0);
}
const unsigned char *font_data;
if (iter->offset < iter->offset_limit) {
font_data = get_font_data_from_char(iter->right);
for (int y = 0; y < 5; ++y) {
int pix = get_pixel_from_font_data(font_data, iter->offset, y)*MAX_BRIGHTNESS;
greyscaleSetPixelValue(iter->img, 4, y, pix);
}
} else if (iter->offset == iter->offset_limit) {
++iter->next_char;
if (iter->next_char == iter->end) {
iter->right = ' ';
iter->offset_limit = 5;
iter->offset = 0;
} else {
iter->right = *iter->next_char;
font_data = get_font_data_from_char(iter->right);
if (iter->monospace) {
iter->offset = -1;
iter->offset_limit = 5;
} else {
iter->offset = -font_column_non_blank(font_data, 0);
iter->offset_limit = rightmost_non_blank_column(font_data)+1;
}
}
}
++iter->offset;
return iter->img;
}
const mp_obj_type_t microbit_scrolling_string_type = {
{ &mp_type_type },
.name = MP_QSTR_ScrollingString,
.print = NULL,
.make_new = NULL,
.call = NULL,
.unary_op = NULL,
.binary_op = NULL,
.attr = NULL,
.subscr = NULL,
.getiter = get_microbit_scrolling_string_iter,
.iternext = NULL,
.buffer_p = {NULL},
.locals_dict = NULL,
};
const mp_obj_type_t microbit_scrolling_string_iterator_type = {
{ &mp_type_type },
.name = MP_QSTR_iterator,
.print = NULL,
.make_new = NULL,
.call = NULL,
.unary_op = NULL,
.binary_op = NULL,
.attr = NULL,
.subscr = NULL,
.getiter = mp_identity_getiter,
.iternext = microbit_scrolling_string_iter_next,
.buffer_p = {NULL},
.locals_dict = NULL,
};
/** Facade types to present a string as a sequence of images.
* These are necessary to avoid allocation during iteration,
* which may happen in interrupt handlers.
*/
typedef struct _string_image_facade_t {
mp_obj_base_t base;
mp_obj_t string;
greyscale_t *image;
} string_image_facade_t;
static mp_obj_t string_image_facade_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
if (value == MP_OBJ_SENTINEL) {
// Fill in image
string_image_facade_t *self = (string_image_facade_t *)self_in;
size_t len;
const char *text = mp_obj_str_get_data(self->string, &len);
mp_uint_t index = mp_get_index(self->base.type, len, index_in, false);
microbit_image_set_from_char(self->image, text[index]);
return self->image;
} else {
return MP_OBJ_NULL; // op not supported
}
}
static mp_obj_t facade_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
string_image_facade_t *self = (string_image_facade_t *)self_in;
switch (op) {
case MP_UNARY_OP_LEN:
return mp_obj_len(self->string);
default: return MP_OBJ_NULL; // op not supported
}
}
static mp_obj_t microbit_facade_iterator(mp_obj_t iterable_in, mp_obj_iter_buf_t *iter_buf);
const mp_obj_type_t string_image_facade_type = {
{ &mp_type_type },
.name = MP_QSTR_Facade,
.print = NULL,
.make_new = NULL,
.call = NULL,
.unary_op = facade_unary_op,
.binary_op = NULL,
.attr = NULL,
.subscr = string_image_facade_subscr,
.getiter = microbit_facade_iterator,
.iternext = NULL,
.buffer_p = {NULL},
NULL
};
typedef struct _facade_iterator_t {
mp_obj_base_t base;
mp_obj_t string;
mp_uint_t index;
greyscale_t *image;
} facade_iterator_t;
mp_obj_t microbit_string_facade(mp_obj_t string) {
string_image_facade_t *result = mp_obj_malloc(string_image_facade_t, &string_image_facade_type);
result->string = string;
result->image = greyscale_new(5,5);
return result;
}
static mp_obj_t microbit_facade_iter_next(mp_obj_t iter_in) {
facade_iterator_t *iter = (facade_iterator_t *)iter_in;
size_t len;
const char *text = mp_obj_str_get_data(iter->string, &len);
if (iter->index >= len) {
return MP_OBJ_STOP_ITERATION;
}
microbit_image_set_from_char(iter->image, text[iter->index]);
iter->index++;
return iter->image;
}
const mp_obj_type_t microbit_facade_iterator_type = {
{ &mp_type_type },
.name = MP_QSTR_iterator,
.print = NULL,
.make_new = NULL,
.call = NULL,
.unary_op = NULL,
.binary_op = NULL,
.attr = NULL,
.subscr = NULL,
.getiter = mp_identity_getiter,
.iternext = microbit_facade_iter_next,
.buffer_p = {NULL},
NULL
};
mp_obj_t microbit_facade_iterator(mp_obj_t iterable_in, mp_obj_iter_buf_t *iter_buf) {
(void)iter_buf;
facade_iterator_t *result = m_new_obj(facade_iterator_t);
string_image_facade_t *iterable = (string_image_facade_t *)iterable_in;
result->base.type = &microbit_facade_iterator_type;
result->string = iterable->string;
result->image = iterable->image;
result->index = 0;
return result;
}
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