// This file is part of the CircuitPython project: https://circuitpython.org
//
// SPDX-FileCopyrightText: Copyright (c) 2019 Scott Shawcroft for Adafruit Industries
//
// SPDX-License-Identifier: MIT

#pragma once

#include <stdint.h>
#include <stdbool.h>

// Implementations are in area.c
typedef struct _displayio_area_t displayio_area_t;

struct _displayio_area_t {
    int16_t x1;
    int16_t y1;
    int16_t x2; // Second point is exclusive.
    int16_t y2;
    const displayio_area_t *next; // Next area in the linked list.
};

typedef struct {
    uint16_t x;
    uint16_t y;
    int8_t dx;
    int8_t dy;
    uint8_t scale;
    uint16_t width;
    uint16_t height;
    bool mirror_x;
    bool mirror_y;
    bool transpose_xy;
} displayio_buffer_transform_t;

extern displayio_buffer_transform_t null_transform;

bool displayio_area_empty(const displayio_area_t *a);
void displayio_area_copy_coords(const displayio_area_t *src, displayio_area_t *dest);
void displayio_area_canon(displayio_area_t *a);
void displayio_area_union(const displayio_area_t *a,
    const displayio_area_t *b,
    displayio_area_t *u);
void displayio_area_copy(const displayio_area_t *src, displayio_area_t *dst);
void displayio_area_scale(displayio_area_t *area, uint16_t scale);
void displayio_area_shift(displayio_area_t *area, int16_t dx, int16_t dy);
bool displayio_area_compute_overlap(const displayio_area_t *a,
    const displayio_area_t *b,
    displayio_area_t *overlap);
uint16_t displayio_area_width(const displayio_area_t *area);
uint16_t displayio_area_height(const displayio_area_t *area);
uint32_t displayio_area_size(const displayio_area_t *area);
bool displayio_area_equal(const displayio_area_t *a, const displayio_area_t *b);
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);