91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-bindings/displayio/Shape.h"
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#include <string.h>
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#include "py/runtime.h"
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void common_hal_displayio_shape_construct(displayio_shape_t *self, uint32_t width,
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uint32_t height, bool mirror_x, bool mirror_y) {
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self->mirror_x = mirror_x;
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self->mirror_y = mirror_y;
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self->width = width;
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if (self->mirror_x) {
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width /= 2;
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width += self->width % 2 - 1;
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}
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self->half_width = width;
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self->height = height;
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if (self->mirror_y) {
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height /= 2;
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height += self->height % 2 - 1;
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}
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self->half_height = height;
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self->data = m_malloc(height * sizeof(uint32_t), false);
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for (uint16_t i = 0; i < height; i++) {
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self->data[2 * i] = 0;
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self->data[2 * i + 1] = width;
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}
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}
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void common_hal_displayio_shape_set_boundary(displayio_shape_t *self, uint16_t y, uint16_t start_x, uint16_t end_x) {
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if (y < 0 || y >= self->height || (self->mirror_y && y > self->half_height)) {
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mp_raise_ValueError(translate("y value out of bounds"));
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}
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if (start_x < 0 || start_x > self->width || end_x < 0 || end_x > self->height) {
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mp_raise_ValueError(translate("x value out of bounds"));
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}
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uint16_t half_width = self->width / 2 - 1 + self->width % 2;
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if (self->mirror_x && (start_x > half_width || end_x > half_width)) {
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mp_raise_ValueError_varg(translate("Maximum x value when mirrored is %d"), half_width);
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}
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self->data[2 * y] = start_x;
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self->data[2 * y + 1] = end_x;
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}
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uint32_t common_hal_displayio_shape_get_pixel(void *obj, int16_t x, int16_t y) {
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displayio_shape_t *self = obj;
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if (x >= self->width || x < 0 || y >= self->height || y < 0) {
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return 0;
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}
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if (self->mirror_x && x > self->half_width) {
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x = self->width - 1 - x;
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}
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if (self->mirror_y && y > self->half_height) {
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y = self->height - y - 1;
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}
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uint16_t start_x = self->data[2 * y];
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uint16_t end_x = self->data[2 * y + 1];
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if (x < start_x || x > end_x) {
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return 0;
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}
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return 1;
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}
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