/*
 * Copyright (C) 2019  Max Regan
 *
 * 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.
 */

#ifndef _DISPLAY_H_
#define _DISPLAY_H_

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

#include "spi.h"
#include "font.h"

#define DISPLAY_WIDTH 144
#define DISPLAY_HEIGHT 168

struct display_line
{
    uint8_t mode;
    uint8_t line;
    uint8_t data[DISPLAY_WIDTH / 8];
};

struct display_buffer
{
    struct display_line lines[DISPLAY_HEIGHT];
    uint16_t dummy;
};

static_assert(sizeof(struct display_buffer) == (DISPLAY_WIDTH / 8 + 2) * DISPLAY_HEIGHT + 2,
    "The display buffer structure must be packed");

struct display
{
    SPI_TypeDef *spi;
    struct display_buffer buffer;

    bool is_dirty;
    uint8_t dirty_line_min;
    uint8_t dirty_line_max;
};


void display_init(struct display *display, SPI_TypeDef *spi);

void display_set_bit(struct display *display, unsigned int x, unsigned int y, uint8_t val);

void display_set_byte(struct display *display, unsigned int x, unsigned int y, uint8_t val);

void display_char_at(struct display *display, int *x_off, int y_off, char c, const struct font *font);

void display_string_at(struct display *display, int x_off, int y_off, const char *string, const struct font *font);

void display_refresh(struct display *display);

// TODO
void display_clear(struct display *display);

#endif