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90 lines (82 loc) · 3.23 KB
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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"
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 - 1;
}
self->half_width = width;
self->height = height;
if (self->mirror_y) {
height /= 2;
height += self->height % 2 - 1;
}
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;
}
}
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"));
}
uint16_t half_width = self->width / 2 - 1 + self->width % 2;
if (self->mirror_x && (start_x > half_width || end_x > half_width)) {
mp_raise_ValueError_varg(translate("Maximum x value when mirrored is %d"), half_width);
}
self->data[2 * y] = start_x;
self->data[2 * y + 1] = end_x;
}
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 - 1 - x;
}
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;
}