nano_gfx_types.h

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/*
    MIT License

    Copyright (c) 2017-2019, Alexey Dynda

    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 _NANO_GFX_TYPES_H_
#define _NANO_GFX_TYPES_H_

#include "lcd_hal/io.h"
#include "canvas/canvas_types.h"

#ifndef lcd_gfx_min

#define lcd_gfx_min(a, b) ((a) < (b) ? (a) : (b))
#endif

#ifndef lcd_gfx_max

#define lcd_gfx_max(a, b) ((a) > (b) ? (a) : (b))
#endif

typedef struct
{
    uint8_t left;
    uint8_t top;
    uint8_t right;
    uint8_t bottom;
} SSD1306_RECT;

typedef struct SPRITE
{
    uint8_t x;
    uint8_t y;
    uint8_t w;
    uint8_t lx;
    uint8_t ly;
    const uint8_t *data;

#ifdef __cplusplus

    void setPos(uint8_t x, uint8_t y);

    void draw();

    void eraseTrace();

    void erase();

    inline bool isNearMove() const
    {
        /* We emulate abs function for unsigned vars here */
        return (((uint8_t)(x - lx) < w) || ((uint8_t)(lx - x) < w)) &&
               (((uint8_t)(y - ly) < 8) || ((uint8_t)(ly - y) < 8));
    };

    inline SSD1306_RECT getRect() const
    {
        uint8_t right = ((x + w - 1) >> 3);
        uint8_t bottom = ((y + 7) >> 3);
        uint8_t left = x >> 3;
        left = left < right ? left : 0;
        uint8_t top = y >> 3;
        top = top < bottom ? top : 0;
        return (SSD1306_RECT){left, top, right, bottom};
    };

    inline SSD1306_RECT getLRect() const
    {
        uint8_t left = lx;
        uint8_t top = ly;
        uint8_t right = (uint8_t)(lx + w - 1);
        uint8_t bottom = (uint8_t)(ly + 7);
        left = left < right ? left : 0;
        top = top < bottom ? top : 0;
        return (SSD1306_RECT){left, top, right, bottom};
    };

    inline SSD1306_RECT getUpdateRect() const
    {
        uint8_t left = lcd_gfx_min(x, lx);
        uint8_t top = lcd_gfx_min(y, ly);
        uint8_t right = lcd_gfx_max((uint8_t)(x + w - 1), (uint8_t)(lx + w - 1));
        if ( ((uint8_t)(lx + w - 1) < w) && (right > 2 * w) )
        {
            right = (uint8_t)(lx + w - 1);
        }
        uint8_t bottom = lcd_gfx_max((uint8_t)(y + 7), (uint8_t)(ly + 7));
        if ( ((uint8_t)(ly + 7) < 8) && (bottom > 16) )
        {
            bottom = (uint8_t)(ly + 7);
        }
        if ( left > right )
            left = 0;
        if ( top > bottom )
            top = 0;
        return (SSD1306_RECT){left, top, right, bottom};
    };
#endif
} SPRITE;

// ----------------------------------------------------------------------------
#endif // _NANO_GFX_TYPES_H_