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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 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/Shape.h"
#include <string.h>
#include "py/runtime.h"
#include "py/misc.h"
void common_hal_displayio_shape_construct(displayio_shape_t *self, uint32_t width,
uint32_t height, bool mirror_x, bool mirror_y) {
self->mirror_x = mirror_x;
self->mirror_y = mirror_y;
self->width = width;
if (self->mirror_x) {
width /= 2;
width += self->width % 2;
}
self->half_width = width;
self->height = height;
if (self->mirror_y) {
height /= 2;
height += self->height % 2;
}
self->half_height = height;
self->data = m_malloc(height * sizeof(uint32_t), false);
for (uint16_t i = 0; i < height; i++) {
self->data[2 * i] = 0;
self->data[2 * i + 1] = width;
}
self->dirty_area.x1 = 0;
self->dirty_area.x2 = width;
self->dirty_area.y1 = 0;
self->dirty_area.y2 = height;
}
void common_hal_displayio_shape_set_boundary(displayio_shape_t *self, uint16_t y, uint16_t start_x, uint16_t end_x) {
if (y < 0 || y >= self->height || (self->mirror_y && y >= self->half_height)) {
mp_raise_ValueError(translate("y value out of bounds"));
}
if (start_x < 0 || start_x >= self->width || end_x < 0 || end_x >= self->width) {
mp_raise_ValueError(translate("x value out of bounds"));
}
if (self->mirror_x && (start_x >= self->half_width || end_x >= self->half_width)) {
mp_raise_ValueError_varg(translate("Maximum x value when mirrored is %d"), self->half_width);
}
uint16_t lower_x, upper_x, lower_y, upper_y;
// find x-boundaries for updating based on current data and start_x, end_x, and mirror_x
lower_x = MIN(start_x, self->data[2 * y]);
if (self->mirror_x) {
upper_x = self->width - lower_x + 1; // dirty rectangles are treated with max value exclusive
} else {
upper_x = MAX(end_x, self->data[2 * y + 1]) + 1; // dirty rectangles are treated with max value exclusive
}
// find y-boundaries based on y and mirror_y
lower_y = y;
if (self->mirror_y) {
upper_y = self->height - lower_y + 1; // dirty rectangles are treated with max value exclusive
} else {
upper_y = y + 1; // dirty rectangles are treated with max value exclusive
}
self->data[2 * y] = start_x; // update the data array with the new boundaries
self->data[2 * y + 1] = end_x;
if (self->dirty_area.x1 == self->dirty_area.x2) { // Dirty region is empty
self->dirty_area.x1 = lower_x;
self->dirty_area.x2 = upper_x;
self->dirty_area.y1 = lower_y;
self->dirty_area.y2 = upper_y;
} else { // Dirty region is not empty
self->dirty_area.x1 = MIN(lower_x, self->dirty_area.x1);
self->dirty_area.x2 = MAX(upper_x, self->dirty_area.x2);
self->dirty_area.y1 = MIN(lower_y, self->dirty_area.y1);
self->dirty_area.y2 = MAX(upper_y, self->dirty_area.y2);
}
}
uint32_t common_hal_displayio_shape_get_pixel(void *obj, int16_t x, int16_t y) {
displayio_shape_t *self = obj;
if (x >= self->width || x < 0 || y >= self->height || y < 0) {
return 0;
}
if (self->mirror_x && x >= self->half_width) {
x = self->width - x - 1;
}
if (self->mirror_y && y >= self->half_height) {
y = self->height - y - 1;
}
uint16_t start_x = self->data[2 * y];
uint16_t end_x = self->data[2 * y + 1];
if (x < start_x || x > end_x) {
return 0;
}
return 1;
}
displayio_area_t *displayio_shape_get_refresh_areas(displayio_shape_t *self, displayio_area_t *tail) {
if (self->dirty_area.x1 == self->dirty_area.x2) {
return tail;
}
self->dirty_area.next = tail;
return &self->dirty_area;
}
void displayio_shape_finish_refresh(displayio_shape_t *self) {
self->dirty_area.x1 = 0;
self->dirty_area.x2 = 0;
}
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