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circuitpython/shared-module/bitmaptools/__init__.c
foamyguy 80c7a15df7 fix dirty area initial points
2021-08-22 10:52:28 -05:00

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Kevin Matocha
*
* 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/bitmaptools/__init__.h"
#include "shared-bindings/displayio/Bitmap.h"
#include "shared-module/displayio/Bitmap.h"
#include "py/runtime.h"
#include "py/mperrno.h"
#include "math.h"
#include "stdlib.h"
void common_hal_bitmaptools_rotozoom(displayio_bitmap_t *self, int16_t ox, int16_t oy,
int16_t dest_clip0_x, int16_t dest_clip0_y,
int16_t dest_clip1_x, int16_t dest_clip1_y,
displayio_bitmap_t *source, int16_t px, int16_t py,
int16_t source_clip0_x, int16_t source_clip0_y,
int16_t source_clip1_x, int16_t source_clip1_y,
float angle,
float scale,
uint32_t skip_index, bool skip_index_none) {
// Copies region from source to the destination bitmap, including rotation,
// scaling and clipping of either the source or destination regions
//
// *self: destination bitmap
// ox: the (ox, oy) destination point where the source (px,py) point is placed
// oy:
// dest_clip0: (x,y) is the corner of the clip window on the destination bitmap
// dest_clip1: (x,y) is the other corner of the clip window of the destination bitmap
// *source: the source bitmap
// px: the (px, py) point of rotation of the source bitmap
// py:
// source_clip0: (x,y) is the corner of the clip window on the source bitmap
// source_clip1: (x,y) is the other of the clip window on the source bitmap
// angle: angle of rotation in radians, positive is clockwise
// scale: scale factor
// skip_index: color index that should be ignored (and not copied over)
// skip_index_none: if skip_index_none is True, then all color indexes should be copied
// (that is, no color indexes should be skipped)
// Copy complete "source" bitmap into "self" bitmap at location x,y in the "self"
// Add a boolean to determine if all values are copied, or only if non-zero
// If skip_value is encountered in the source bitmap, it will not be copied.
// If skip_value is `None`, then all pixels are copied.
// # Credit from https://github.com/wernsey/bitmap
// # MIT License from
// # * Copyright (c) 2017 Werner Stoop <wstoop@gmail.com>
// #
// # *
// # * #### `void bm_rotate_blit(Bitmap *dst, int ox, int oy, Bitmap *src, int px, int py, double angle, double scale);`
// # *
// # * Rotates a source bitmap `src` around a pivot point `px,py` and blits it onto a destination bitmap `dst`.
// # *
// # * The bitmap is positioned such that the point `px,py` on the source is at the offset `ox,oy` on the destination.
// # *
// # * The `angle` is clockwise, in radians. The bitmap is also scaled by the factor `scale`.
// #
// # void bm_rotate_blit(Bitmap *dst, int ox, int oy, Bitmap *src, int px, int py, double angle, double scale);
// # /*
// # Reference:
// # "Fast Bitmap Rotation and Scaling" By Steven Mortimer, Dr Dobbs' Journal, July 01, 2001
// # http://www.drdobbs.com/architecture-and-design/fast-bitmap-rotation-and-scaling/184416337
// # See also http://www.efg2.com/Lab/ImageProcessing/RotateScanline.htm
// # */
int16_t x,y;
int16_t minx = dest_clip1_x;
int16_t miny = dest_clip1_y;
int16_t maxx = dest_clip0_x;
int16_t maxy = dest_clip0_y;
float sinAngle = sinf(angle);
float cosAngle = cosf(angle);
float dx, dy;
/* Compute the position of where each corner on the source bitmap
will be on the destination to get a bounding box for scanning */
dx = -cosAngle * px * scale + sinAngle * py * scale + ox;
dy = -sinAngle * px * scale - cosAngle * py * scale + oy;
if (dx < minx) {
minx = (int16_t)dx;
}
if (dx > maxx) {
maxx = (int16_t)dx;
}
if (dy < miny) {
miny = (int16_t)dy;
}
if (dy > maxy) {
maxy = (int16_t)dy;
}
dx = cosAngle * (source->width - px) * scale + sinAngle * py * scale + ox;
dy = sinAngle * (source->width - px) * scale - cosAngle * py * scale + oy;
if (dx < minx) {
minx = (int16_t)dx;
}
if (dx > maxx) {
maxx = (int16_t)dx;
}
if (dy < miny) {
miny = (int16_t)dy;
}
if (dy > maxy) {
maxy = (int16_t)dy;
}
dx = cosAngle * (source->width - px) * scale - sinAngle * (source->height - py) * scale + ox;
dy = sinAngle * (source->width - px) * scale + cosAngle * (source->height - py) * scale + oy;
if (dx < minx) {
minx = (int16_t)dx;
}
if (dx > maxx) {
maxx = (int16_t)dx;
}
if (dy < miny) {
miny = (int16_t)dy;
}
if (dy > maxy) {
maxy = (int16_t)dy;
}
dx = -cosAngle * px * scale - sinAngle * (source->height - py) * scale + ox;
dy = -sinAngle * px * scale + cosAngle * (source->height - py) * scale + oy;
if (dx < minx) {
minx = (int16_t)dx;
}
if (dx > maxx) {
maxx = (int16_t)dx;
}
if (dy < miny) {
miny = (int16_t)dy;
}
if (dy > maxy) {
maxy = (int16_t)dy;
}
/* Clipping */
if (minx < dest_clip0_x) {
minx = dest_clip0_x;
}
if (maxx > dest_clip1_x - 1) {
maxx = dest_clip1_x - 1;
}
if (miny < dest_clip0_y) {
miny = dest_clip0_y;
}
if (maxy > dest_clip1_y - 1) {
maxy = dest_clip1_y - 1;
}
float dvCol = cosAngle / scale;
float duCol = sinAngle / scale;
float duRow = dvCol;
float dvRow = -duCol;
float startu = px - (ox * dvCol + oy * duCol);
float startv = py - (ox * dvRow + oy * duRow);
float rowu = startu + miny * duCol;
float rowv = startv + miny * dvCol;
displayio_area_t dirty_area = {minx, miny, maxx + 1, maxy + 1};
displayio_bitmap_set_dirty_area(self, &dirty_area);
for (y = miny; y <= maxy; y++) {
float u = rowu + minx * duRow;
float v = rowv + minx * dvRow;
for (x = minx; x <= maxx; x++) {
if (u >= source_clip0_x && u < source_clip1_x && v >= source_clip0_y && v < source_clip1_y) {
uint32_t c = common_hal_displayio_bitmap_get_pixel(source, u, v);
if ((skip_index_none) || (c != skip_index)) {
displayio_bitmap_write_pixel(self, x, y, c);
}
}
u += duRow;
v += dvRow;
}
rowu += duCol;
rowv += dvCol;
}
}
int16_t constrain(int16_t input, int16_t min, int16_t max) {
// constrain the input between the min and max values
if (input < min) {
return min;
}
if (input > max) {
return max;
}
return input;
}
void common_hal_bitmaptools_fill_region(displayio_bitmap_t *destination,
int16_t x1, int16_t y1,
int16_t x2, int16_t y2,
uint32_t value) {
// writes the value (a bitmap color index) into a bitmap in the specified rectangular region
//
// input checks should ensure that x1 < x2 and y1 < y2 and are within the bitmap region
displayio_area_t area = { x1, y1, x2, y2 };
displayio_area_canon(&area);
displayio_area_t bitmap_area = { 0, 0, destination->width, destination->height };
displayio_area_compute_overlap(&area, &bitmap_area, &area);
// update the dirty rectangle
displayio_bitmap_set_dirty_area(destination, &area);
int16_t x, y;
for (x = area.x1; x < area.x2; x++) {
for (y = area.y1; y < area.y2; y++) {
displayio_bitmap_write_pixel(destination, x, y, value);
}
}
}
void common_hal_bitmaptools_boundary_fill(displayio_bitmap_t *destination,
int16_t x, int16_t y,
uint32_t fill_color_value, uint32_t replaced_color_value) {
if (fill_color_value == replaced_color_value) {
// There is nothing to do
return;
}
uint32_t current_point_color_value;
// the list of points that we'll check
mp_obj_t fill_area = mp_obj_new_list(0, NULL);
// first point is the one user passed in
mp_obj_t point[] = { mp_obj_new_int(x), mp_obj_new_int(y) };
mp_obj_list_append(
fill_area,
mp_obj_new_tuple(2, point)
);
int16_t minx = x;
int16_t miny = y;
int16_t maxx = x;
int16_t maxy = y;
if (replaced_color_value == INT_MAX) {
current_point_color_value = common_hal_displayio_bitmap_get_pixel(
destination,
mp_obj_get_int(point[0]),
mp_obj_get_int(point[1]));
replaced_color_value = (uint32_t)current_point_color_value;
}
mp_obj_t *fill_points;
size_t list_length = 0;
mp_obj_list_get(fill_area, &list_length, &fill_points);
mp_obj_t current_point;
size_t tuple_len = 0;
mp_obj_t *tuple_items;
int cur_x, cur_y;
// while there are still points to check
while (list_length > 0) {
mp_obj_list_get(fill_area, &list_length, &fill_points);
current_point = mp_obj_list_pop(fill_area, 0);
mp_obj_tuple_get(current_point, &tuple_len, &tuple_items);
current_point_color_value = common_hal_displayio_bitmap_get_pixel(
destination,
mp_obj_get_int(tuple_items[0]),
mp_obj_get_int(tuple_items[1]));
// if the current point is not background color ignore it
if (current_point_color_value != replaced_color_value) {
mp_obj_list_get(fill_area, &list_length, &fill_points);
continue;
}
cur_x = mp_obj_int_get_checked(tuple_items[0]);
cur_y = mp_obj_int_get_checked(tuple_items[1]);
if (cur_x < minx) {
minx = (int16_t)cur_x;
}
if (cur_x > maxx) {
maxx = (int16_t)cur_x;
}
if (cur_y < miny) {
miny = (int16_t)cur_y;
}
if (cur_y > maxy) {
maxy = (int16_t)cur_y;
}
// fill the current point with fill color
displayio_bitmap_write_pixel(
destination,
mp_obj_get_int(tuple_items[0]),
mp_obj_get_int(tuple_items[1]),
fill_color_value);
// add all 4 surrounding points to the list to check
// ignore points outside of the bitmap
if (mp_obj_int_get_checked(tuple_items[1]) - 1 >= 0) {
mp_obj_t above_point[] = {
tuple_items[0],
MP_OBJ_NEW_SMALL_INT(mp_obj_int_get_checked(tuple_items[1]) - 1)
};
mp_obj_list_append(
fill_area,
mp_obj_new_tuple(2, above_point));
}
// ignore points outside of the bitmap
if (mp_obj_int_get_checked(tuple_items[0]) - 1 >= 0) {
mp_obj_t left_point[] = {
MP_OBJ_NEW_SMALL_INT(mp_obj_int_get_checked(tuple_items[0]) - 1),
tuple_items[1]
};
mp_obj_list_append(
fill_area,
mp_obj_new_tuple(2, left_point));
}
// ignore points outside of the bitmap
if (mp_obj_int_get_checked(tuple_items[0]) + 1 < destination->width) {
mp_obj_t right_point[] = {
MP_OBJ_NEW_SMALL_INT(mp_obj_int_get_checked(tuple_items[0]) + 1),
tuple_items[1]
};
mp_obj_list_append(
fill_area,
mp_obj_new_tuple(2, right_point));
}
// ignore points outside of the bitmap
if (mp_obj_int_get_checked(tuple_items[1]) + 1 < destination->height) {
mp_obj_t below_point[] = {
tuple_items[0],
MP_OBJ_NEW_SMALL_INT(mp_obj_int_get_checked(tuple_items[1]) + 1)
};
mp_obj_list_append(
fill_area,
mp_obj_new_tuple(2, below_point));
}
mp_obj_list_get(fill_area, &list_length, &fill_points);
}
// set dirty the area so displayio will draw
displayio_area_t area = { minx, miny, maxx + 1, maxy + 1};
displayio_bitmap_set_dirty_area(destination, &area);
}
void common_hal_bitmaptools_draw_line(displayio_bitmap_t *destination,
int16_t x0, int16_t y0,
int16_t x1, int16_t y1,
uint32_t value) {
//
// adapted from Adafruit_CircuitPython_Display_Shapes.Polygon._line
//
// update the dirty rectangle
int16_t xbb0, xbb1, ybb0, ybb1;
if (x0 < x1) {
xbb0 = x0;
xbb1 = x1 + 1;
} else {
xbb0 = x1;
xbb1 = x0 + 1;
}
if (y0 < y1) {
ybb0 = y0;
ybb1 = y1 + 1;
} else {
ybb0 = y1;
ybb1 = y0 + 1;
}
displayio_area_t area = { xbb0, ybb0, xbb1, ybb1 };
displayio_area_t bitmap_area = { 0, 0, destination->width, destination->height };
displayio_area_compute_overlap(&area, &bitmap_area, &area);
displayio_bitmap_set_dirty_area(destination, &area);
int16_t temp, x, y;
if (x0 == x1) { // vertical line
if (y0 > y1) { // ensure y1 > y0
temp = y0;
y0 = y1;
y1 = temp;
}
for (y = y0; y < (y1 + 1); y++) { // write a horizontal line
displayio_bitmap_write_pixel(destination, x0, y, value);
}
} else if (y0 == y1) { // horizontal line
if (x0 > x1) { // ensure y1 > y0
temp = x0;
x0 = x1;
x1 = temp;
}
for (x = x0; x < (x1 + 1); x++) { // write a horizontal line
displayio_bitmap_write_pixel(destination, x, y0, value);
}
} else {
bool steep;
steep = (abs(y1 - y0) > abs(x1 - x0));
if (steep) { // flip x0<->y0 and x1<->y1
temp = x0;
x0 = y0;
y0 = temp;
temp = x1;
x1 = y1;
y1 = temp;
}
if (x0 > x1) { // flip x0<->x1 and y0<->y1
temp = x0;
x0 = x1;
x1 = temp;
temp = y0;
y0 = y1;
y1 = temp;
}
int16_t dx, dy, ystep;
dx = x1 - x0;
dy = abs(y1 - y0);
float err = dx / 2;
if (y0 < y1) {
ystep = 1;
} else {
ystep = -1;
}
for (x = x0; x < (x1 + 1); x++) {
if (steep) {
displayio_bitmap_write_pixel(destination, y0, x, value);
} else {
displayio_bitmap_write_pixel(destination, x, y0, value);
}
err -= dy;
if (err < 0) {
y0 += ystep;
err += dx;
}
}
}
}
void common_hal_bitmaptools_arrayblit(displayio_bitmap_t *self, void *data, int element_size, int x1, int y1, int x2, int y2, bool skip_specified, uint32_t skip_value) {
uint32_t mask = (1 << common_hal_displayio_bitmap_get_bits_per_value(self)) - 1;
for (int y = y1; y < y2; y++) {
for (int x = x1; x < x2; x++) {
uint32_t value;
switch (element_size) {
default:
case 1:
value = *(uint8_t *)data;
data = (void *)((uint8_t *)data + 1);
break;
case 2:
value = *(uint16_t *)data;
data = (void *)((uint16_t *)data + 1);
break;
case 4:
value = *(uint32_t *)data;
data = (void *)((uint32_t *)data + 1);
break;
}
if (!skip_specified || value != skip_value) {
displayio_bitmap_write_pixel(self, x, y, value & mask);
}
}
}
displayio_area_t area = { x1, y1, x2, y2 };
displayio_bitmap_set_dirty_area(self, &area);
}
void common_hal_bitmaptools_readinto(displayio_bitmap_t *self, pyb_file_obj_t *file, int element_size, int bits_per_pixel, bool reverse_pixels_in_element, bool swap_bytes, bool reverse_rows) {
uint32_t mask = (1 << common_hal_displayio_bitmap_get_bits_per_value(self)) - 1;
displayio_area_t a = {0, 0, self->width, self->height};
displayio_bitmap_set_dirty_area(self, &a);
size_t elements_per_row = (self->width * bits_per_pixel + element_size * 8 - 1) / (element_size * 8);
size_t rowsize = element_size * elements_per_row;
size_t rowsize_in_u32 = (rowsize + sizeof(uint32_t) - 1) / sizeof(uint32_t);
size_t rowsize_in_u16 = (rowsize + sizeof(uint16_t) - 1) / sizeof(uint16_t);
for (int y = 0; y < self->height; y++) {
uint32_t rowdata32[rowsize_in_u32];
uint16_t *rowdata16 = (uint16_t *)rowdata32;
uint8_t *rowdata8 = (uint8_t *)rowdata32;
const int y_draw = reverse_rows ? (self->height) - 1 - y : y;
UINT bytes_read = 0;
if (f_read(&file->fp, rowdata32, rowsize, &bytes_read) != FR_OK || bytes_read != rowsize) {
mp_raise_OSError(MP_EIO);
}
if (swap_bytes) {
switch (element_size) {
case 2:
for (size_t i = 0; i < rowsize_in_u16; i++) {
rowdata16[i] = __builtin_bswap16(rowdata16[i]);
}
break;
case 4:
for (size_t i = 0; i < rowsize_in_u32; i++) {
rowdata32[i] = __builtin_bswap32(rowdata32[i]);
}
default:
break;
}
}
for (int x = 0; x < self->width; x++) {
int value = 0;
switch (bits_per_pixel) {
case 1: {
int byte_offset = x / 8;
int bit_offset = reverse_pixels_in_element ? (7 - x % 8) : x % 8;
value = (rowdata8[byte_offset] >> bit_offset) & 1;
break;
}
case 2: {
int byte_offset = x / 4;
int bit_offset = 2 * (reverse_pixels_in_element ? (3 - x % 4) : x % 4);
value = (rowdata8[byte_offset] >> bit_offset) & 3;
break;
}
case 4: {
int byte_offset = x / 2;
int bit_offset = 4 * (reverse_pixels_in_element ? (1 - x % 2) : x % 2);
value = (rowdata8[byte_offset] >> bit_offset) & 0xf;
break;
}
case 8:
value = rowdata8[x];
break;
case 16:
value = rowdata16[x];
break;
case 24:
value = (rowdata8[x * 3] << 16) | (rowdata8[x * 3 + 1] << 8) | (rowdata8[x * 3 + 2] << 8);
break;
case 32:
value = rowdata32[x];
break;
}
displayio_bitmap_write_pixel(self, x, y_draw, value & mask);
}
}
}
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