57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
// 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);
|