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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 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-module/displayio/area.h"
#include "py/misc.h"
void displayio_area_copy(const displayio_area_t *src, displayio_area_t *dst) {
dst->x1 = src->x1;
dst->y1 = src->y1;
dst->x2 = src->x2;
dst->y2 = src->y2;
}
void displayio_area_scale(displayio_area_t *area, uint16_t scale) {
area->x1 *= scale;
area->y1 *= scale;
area->x2 *= scale;
area->y2 *= scale;
}
void displayio_area_shift(displayio_area_t *area, int16_t dx, int16_t dy) {
area->x1 += dx;
area->y1 += dy;
area->x2 += dx;
area->y2 += dy;
}
bool displayio_area_compute_overlap(const displayio_area_t *a,
const displayio_area_t *b,
displayio_area_t *overlap) {
overlap->x1 = a->x1;
if (b->x1 > overlap->x1) {
overlap->x1 = b->x1;
}
overlap->x2 = a->x2;
if (b->x2 < overlap->x2) {
overlap->x2 = b->x2;
}
if (overlap->x1 >= overlap->x2) {
return false;
}
overlap->y1 = a->y1;
if (b->y1 > overlap->y1) {
overlap->y1 = b->y1;
}
overlap->y2 = a->y2;
if (b->y2 < overlap->y2) {
overlap->y2 = b->y2;
}
if (overlap->y1 >= overlap->y2) {
return false;
}
return true;
}
bool displayio_area_empty(const displayio_area_t *a) {
return (a->x1 == a->x2) || (a->y1 == a->y2);
}
void displayio_area_canon(displayio_area_t *a) {
if (a->x1 > a->x2) {
int16_t t = a->x1;
a->x1 = a->x2;
a->x2 = t;
}
if (a->y1 > a->y2) {
int16_t t = a->y1;
a->y1 = a->y2;
a->y2 = t;
}
}
void displayio_area_union(const displayio_area_t *a,
const displayio_area_t *b,
displayio_area_t *u) {
if (displayio_area_empty(a)) {
displayio_area_copy(b, u);
return;
}
if (displayio_area_empty(b)) {
displayio_area_copy(a, u);
return;
}
u->x1 = MIN(a->x1, b->x1);
u->y1 = MIN(a->y1, b->y1);
u->x2 = MAX(a->x2, b->x2);
u->y2 = MAX(a->y2, b->y2);
}
uint16_t displayio_area_width(const displayio_area_t *area) {
return area->x2 - area->x1;
}
uint16_t displayio_area_height(const displayio_area_t *area) {
return area->y2 - area->y1;
}
uint32_t displayio_area_size(const displayio_area_t *area) {
return displayio_area_width(area) * displayio_area_height(area);
}
bool displayio_area_equal(const displayio_area_t *a, const displayio_area_t *b) {
return a->x1 == b->x1 &&
a->y1 == b->y1 &&
a->x2 == b->x2 &&
a->y2 == b->y2;
}
// Original and whole must be in the same coordinate space.
void displayio_area_transform_within(bool mirror_x, bool mirror_y, bool transpose_xy,
const displayio_area_t *original,
const displayio_area_t *whole,
displayio_area_t *transformed) {
if (mirror_x) {
transformed->x1 = whole->x1 + (whole->x2 - original->x2);
transformed->x2 = whole->x2 - (original->x1 - whole->x1);
} else {
transformed->x1 = original->x1;
transformed->x2 = original->x2;
}
if (mirror_y) {
transformed->y1 = whole->y1 + (whole->y2 - original->y2);
transformed->y2 = whole->y2 - (original->y1 - whole->y1);
} else {
transformed->y1 = original->y1;
transformed->y2 = original->y2;
}
if (transpose_xy) {
int16_t y1 = transformed->y1;
int16_t y2 = transformed->y2;
transformed->y1 = whole->y1 + (transformed->x1 - whole->x1);
transformed->y2 = whole->y1 + (transformed->x2 - whole->x1);
transformed->x2 = whole->x1 + (y2 - whole->y1);
transformed->x1 = whole->x1 + (y1 - whole->y1);
}
}
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