adafruit.h

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/*
    MIT License

    Copyright (c) 2018-2019, 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.
*/
#pragma once

#include "lcd_hal/io.h"

#if defined(CONFIG_ADAFRUIT_GFX_ENABLE)

#include "nano_gfx_types.h"

#ifndef DOXYGEN_SHOULD_SKIP_THIS
/* This is special case for non-Arduino platforms, since Adafruit requires *
 * Arduino libraries support                                               */
#ifndef ARDUINO
#define ARDUINO 100
#include "Adafruit_GFX.h"
#undef ARDUINO
#else
#include "Adafruit_GFX.h"
#endif

#endif // DOXYGEN_SHOULD_SKIP_THIS

template <uint8_t BPP> class AdafruitCanvasOps: public Adafruit_GFX
{
public:
    NanoPoint offset;

    static const uint8_t BITS_PER_PIXEL = BPP;

    AdafruitCanvasOps(lcduint_t w, lcduint_t h, uint8_t *buffer)
        : Adafruit_GFX(w, h)
        , offset{0}
        , m_buffer(buffer)
    {
    }

    void drawPixel(int16_t x, int16_t y, uint16_t color) override;

    void setOffset(lcdint_t ox, lcdint_t oy)
    {
        offset.x = ox;
        offset.y = oy;
    };

#ifndef DOXYGEN_SHOULD_SKIP_THIS
    // We need to override Adafruit GFX implementation of fillScreen, because
    // NanoEngine uses offsets, when refreshing screen content.
    void fillScreen(uint16_t color) override
    {
        fillRect(offset.x, offset.y, _width, _height, color);
    }
#endif

protected:
    uint8_t *m_buffer;

private:
    inline void rotatePosition(int16_t &x, int16_t &y)
    {
        switch ( getRotation() )
        {
            case 1:
                canvas_swap_data(x, y, int16_t);
                x = WIDTH - x - 1;
                break;
            case 2:
                x = WIDTH - x - 1;
                y = HEIGHT - y - 1;
                break;
            case 3:
                canvas_swap_data(x, y, int16_t);
                y = HEIGHT - y - 1;
                break;
        }
    }
};

template <uint8_t BPP> class AdafruitCanvasBase: public AdafruitCanvasOps<BPP>
{
public:
    using AdafruitCanvasOps<BPP>::AdafruitCanvasOps;

    virtual void blt(lcdint_t x, lcdint_t y) = 0;

    virtual void blt() = 0;
};

//
//                             1-BIT GRAPHICS
//

class AdafruitCanvas1: public AdafruitCanvasBase<1>
{
public:
    using AdafruitCanvasBase::AdafruitCanvasBase;
};

#ifndef DOXYGEN_SHOULD_SKIP_THIS
template <> void AdafruitCanvasOps<1>::drawPixel(int16_t x, int16_t y, uint16_t color)
{
    x -= offset.x;
    y -= offset.y;
    if ( (x < 0) || (x >= width()) || (y < 0) || (y >= height()) )
    {
        return;
    }
    rotatePosition(x, y);

    switch ( color )
    {
        case 1: m_buffer[x + (y / 8) * WIDTH] |= (1 << (y & 7)); break;
        case 0: m_buffer[x + (y / 8) * WIDTH] &= ~(1 << (y & 7)); break;
        case 2: m_buffer[x + (y / 8) * WIDTH] ^= (1 << (y & 7)); break;
    }
}
#endif // DOXYGEN_SHOULD_SKIP_THIS

//
//                             8-BIT GRAPHICS
//

class AdafruitCanvas8: public AdafruitCanvasBase<8>
{
public:
    using AdafruitCanvasBase::AdafruitCanvasBase;
};

#ifndef DOXYGEN_SHOULD_SKIP_THIS
template <> void AdafruitCanvasOps<8>::drawPixel(int16_t x, int16_t y, uint16_t color)
{
    x -= offset.x;
    y -= offset.y;
    if ( (x < 0) || (x >= width()) || (y < 0) || (y >= height()) )
    {
        return;
    }
    rotatePosition(x, y);

    m_buffer[x + y * WIDTH] = color;
}
#endif // DOXYGEN_SHOULD_SKIP_THIS

//
//                             16-BIT GRAPHICS
//

class AdafruitCanvas16: public AdafruitCanvasBase<16>
{
public:
    using AdafruitCanvasBase::AdafruitCanvasBase;
};

#ifndef DOXYGEN_SHOULD_SKIP_THIS
template <> void AdafruitCanvasOps<16>::drawPixel(int16_t x, int16_t y, uint16_t color)
{
    x -= offset.x;
    y -= offset.y;
    if ( (x < 0) || (x >= width()) || (y < 0) || (y >= height()) )
    {
        return;
    }
    rotatePosition(x, y);

    m_buffer[(x + y * WIDTH) * 2 + 0] = color;
    m_buffer[(x + y * WIDTH) * 2 + 1] = color >> 8;
}
#endif // DOXYGEN_SHOULD_SKIP_THIS

#endif // CONFIG_ADAFRUIT_GFX_ENABLE