Arduino_Canvas.cpp
#include "../Arduino_DataBus.h"
#if !defined(LITTLE_FOOT_PRINT)

#include "../Arduino_GFX.h"
#include "Arduino_Canvas.h"

Arduino_Canvas::Arduino_Canvas(
    int16_t w, int16_t h, Arduino_G *output, int16_t output_x, int16_t output_y, uint8_t r)
    : Arduino_GFX(w, h), _output(output), _output_x(output_x), _output_y(output_y)
{
  MAX_X = WIDTH - 1;
  MAX_Y = HEIGHT - 1;
  setRotation(r);
}

Arduino_Canvas::~Arduino_Canvas()
{
  if (_framebuffer)
  {
    free(_framebuffer);
  }
}

bool Arduino_Canvas::begin(int32_t speed)
{
  if (
      (speed != GFX_SKIP_OUTPUT_BEGIN) && (_output))
  {
    if (!_output->begin(speed))
    {
      return false;
    }
  }

  if (!_framebuffer)
  {
    size_t s = _width * _height * 2;
#if defined(ESP32)
    if (psramFound())
    {
      _framebuffer = (uint16_t *)ps_malloc(s);
    }
    else
    {
      _framebuffer = (uint16_t *)malloc(s);
    }
#else
    _framebuffer = (uint16_t *)malloc(s);
#endif
    if (!_framebuffer)
    {
      return false;
    }
  }

  return true;
}

void Arduino_Canvas::writePixelPreclipped(int16_t x, int16_t y, uint16_t color)
{

  uint16_t *fb = _framebuffer;
  switch (_rotation)
  {
  case 1:
    fb += (int32_t)x * _height;
    fb += _max_y - y;
    *fb = color;
    break;
  case 2:
    fb += (int32_t)(_max_y - y) * _width;
    fb += _max_x - x;
    *fb = color;
    break;
  case 3:
    fb += (int32_t)(_max_x - x) * _height;
    fb += y;
    *fb = color;
    break;
  default: // case 0:
    fb += (int32_t)y * _width;
    fb += x;
    *fb = color;
  }
}

void Arduino_Canvas::writeFastVLine(int16_t x, int16_t y,
                                    int16_t h, uint16_t color)
{
  switch (_rotation)
  {
  case 1:
    writeFastHLineCore(_height - y - h, x, h, color);
    break;
  case 2:
    writeFastVLineCore(_max_x - x, _height - y - h, h, color);
    break;
  case 3:
    writeFastHLineCore(y, _max_x - x, h, color);
    break;
  default: // case 0:
    writeFastVLineCore(x, y, h, color);
  }
}

void Arduino_Canvas::writeFastVLineCore(int16_t x, int16_t y,
                                        int16_t h, uint16_t color)
{
  // log_i("writeFastVLineCore(x: %d, y: %d, h: %d)", x, y, h);
  if (_ordered_in_range(x, 0, MAX_X) && h)
  { // X on screen, nonzero height
    if (h < 0)
    {             // If negative height...
      y += h + 1; //   Move Y to top edge
      h = -h;     //   Use positive height
    }
    if (y <= MAX_Y)
    { // Not off bottom
      int16_t y2 = y + h - 1;
      if (y2 >= 0)
      { // Not off top
        // Line partly or fully overlaps screen
        if (y < 0)
        {
          y = 0;
          h = y2 + 1;
        } // Clip top
        if (y2 > MAX_Y)
        {
          h = MAX_Y - y + 1;
        } // Clip bottom

        uint16_t *fb = _framebuffer + ((int32_t)y * WIDTH) + x;
        while (h--)
        {
          *fb = color;
          fb += WIDTH;
        }
      }
    }
  }
}

void Arduino_Canvas::writeFastHLine(int16_t x, int16_t y,
                                    int16_t w, uint16_t color)
{
  // log_i("writeFastHLine(x: %d, y: %d, w: %d)", x, y, w);
  switch (_rotation)
  {
  case 1:
    writeFastVLineCore(_max_y - y, x, w, color);
    break;
  case 2:
    writeFastHLineCore(_width - x - w, _max_y - y, w, color);
    break;
  case 3:
    writeFastVLineCore(y, _width - x - w, w, color);
    break;
  default: // case 0:
    writeFastHLineCore(x, y, w, color);
  }
}

void Arduino_Canvas::writeFastHLineCore(int16_t x, int16_t y,
                                        int16_t w, uint16_t color)
{
  // log_i("writeFastHLineCore(x: %d, y: %d, w: %d)", x, y, w);
  if (_ordered_in_range(y, 0, MAX_Y) && w)
  { // Y on screen, nonzero width
    if (w < 0)
    {             // If negative width...
      x += w + 1; //   Move X to left edge
      w = -w;     //   Use positive width
    }
    if (x <= MAX_X)
    { // Not off right
      int16_t x2 = x + w - 1;
      if (x2 >= 0)
      { // Not off left
        // Line partly or fully overlaps screen
        if (x < 0)
        {
          x = 0;
          w = x2 + 1;
        } // Clip left
        if (x2 > MAX_X)
        {
          w = MAX_X - x + 1;
        } // Clip right

        uint16_t *fb = _framebuffer + ((int32_t)y * WIDTH) + x;
        while (w--)
        {
          *(fb++) = color;
        }
      }
    }
  }
}

void Arduino_Canvas::writeFillRectPreclipped(int16_t x, int16_t y,
                                             int16_t w, int16_t h, uint16_t color)
{
  // log_i("writeFillRectPreclipped(x: %d, y: %d, w: %d, h: %d)", x, y, w, h);
  if (_rotation > 0)
  {
    int16_t t = x;
    switch (_rotation)
    {
    case 1:
      x = WIDTH - y - h;
      y = t;
      t = w;
      w = h;
      h = t;
      break;
    case 2:
      x = WIDTH - x - w;
      y = HEIGHT - y - h;
      break;
    case 3:
      x = y;
      y = HEIGHT - t - w;
      t = w;
      w = h;
      h = t;
      break;
    }
  }
  // log_i("adjusted writeFillRectPreclipped(x: %d, y: %d, w: %d, h: %d)", x, y, w, h);
  uint16_t *row = _framebuffer;
  row += y * WIDTH;
  row += x;
  for (int j = 0; j < h; j++)
  {
    for (int i = 0; i < w; i++)
    {
      row[i] = color;
    }
    row += WIDTH;
  }
}

void Arduino_Canvas::drawIndexedBitmap(
    int16_t x, int16_t y,
    uint8_t *bitmap, uint16_t *color_index, int16_t w, int16_t h, int16_t x_skip)
{
  if (
      ((x + w - 1) < 0) || // Outside left
      ((y + h - 1) < 0) || // Outside top
      (x > _max_x) ||      // Outside right
      (y > _max_y)         // Outside bottom
  )
  {
    return;
  }
  else
  {
    if ((y + h - 1) > _max_y)
    {
      h -= (y + h - 1) - _max_y;
    }
    if (y < 0)
    {
      bitmap -= y * (w + x_skip);
      h += y;
      y = 0;
    }
    if ((x + w - 1) > _max_x)
    {
      x_skip += (x + w - 1) - _max_x;
      w -= (x + w - 1) - _max_x;
    }
    if (x < 0)
    {
      bitmap -= x;
      x_skip -= x;
      w += x;
      x = 0;
    }
    uint16_t *row = _framebuffer;
    row += y * _width;
    row += x;
    int16_t i;
    int16_t wi;
    while (h--)
    {
      i = 0;
      wi = w;
      while (wi >= 4)
      {
        uint32_t b32 = *((uint32_t *)bitmap);
        row[i++] = color_index[(b32 & 0xff)];
        row[i++] = color_index[(b32 & 0xff00) >> 8];
        row[i++] = color_index[(b32 & 0xff0000) >> 16];
        row[i++] = color_index[(b32 & 0xff000000) >> 24];
        wi -= 4;
        bitmap += 4;
      }
      while (i < w)
      {
        row[i++] = color_index[*bitmap++];
      }
      bitmap += x_skip;
      row += _width;
    }
  }
}

void Arduino_Canvas::drawIndexedBitmap(
    int16_t x, int16_t y,
    uint8_t *bitmap, uint16_t *color_index, uint8_t chroma_key, int16_t w, int16_t h, int16_t x_skip)
{
  if (
      ((x + w - 1) < 0) || // Outside left
      ((y + h - 1) < 0) || // Outside top
      (x > _max_x) ||      // Outside right
      (y > _max_y)         // Outside bottom
  )
  {
    return;
  }
  else
  {
    if ((y + h - 1) > _max_y)
    {
      h -= (y + h - 1) - _max_y;
    }
    if (y < 0)
    {
      bitmap -= y * (w + x_skip);
      h += y;
      y = 0;
    }
    if ((x + w - 1) > _max_x)
    {
      x_skip += (x + w - 1) - _max_x;
      w -= (x + w - 1) - _max_x;
    }
    if (x < 0)
    {
      bitmap -= x;
      x_skip -= x;
      w += x;
      x = 0;
    }
    uint16_t *row = _framebuffer;
    row += y * _width;
    row += x;
    int16_t i;
    int16_t wi;
    uint8_t color_key;
    while (h--)
    {
      i = 0;
      wi = w;
      while (wi >= 4)
      {
        uint32_t b32 = *((uint32_t *)bitmap);
        color_key = (b32 & 0xff);
        if (color_key != chroma_key)
        {
          row[i] = color_index[color_key];
        }
        ++i;
        color_key = (b32 & 0xff00) >> 8;
        if (color_key != chroma_key)
        {
          row[i] = color_index[color_key];
        }
        ++i;
        color_key = (b32 & 0xff0000) >> 16;
        if (color_key != chroma_key)
        {
          row[i] = color_index[color_key];
        }
        ++i;
        color_key = (b32 & 0xff000000) >> 24;
        if (color_key != chroma_key)
        {
          row[i] = color_index[color_key];
        }
        ++i;
        wi -= 4;
        bitmap += 4;
      }
      while (i < w)
      {
        color_key = *bitmap++;
        if (color_key != chroma_key)
        {
          row[i] = color_index[color_key];
        }
        ++i;
      }
      bitmap += x_skip;
      row += _width;
    }
  }
}

void Arduino_Canvas::draw16bitRGBBitmap(int16_t x, int16_t y,
                                        uint16_t *bitmap, int16_t w, int16_t h)
{
  switch (_rotation)
  {
  case 1:
    gfx_draw_bitmap_to_framebuffer_rotate_1(bitmap, w, h, _framebuffer, x, y, _width, _height);
    break;
  case 2:
    gfx_draw_bitmap_to_framebuffer_rotate_2(bitmap, w, h, _framebuffer, x, y, _width, _height);
    break;
  case 3:
    gfx_draw_bitmap_to_framebuffer_rotate_3(bitmap, w, h, _framebuffer, x, y, _width, _height);
    break;
  default: // case 0:
    gfx_draw_bitmap_to_framebuffer(bitmap, w, h, _framebuffer, x, y, _width, _height);
  }
}

void Arduino_Canvas::draw16bitRGBBitmapWithTranColor(
    int16_t x, int16_t y,
    uint16_t *bitmap, uint16_t transparent_color, int16_t w, int16_t h)
{
  if (
      ((x + w - 1) < 0) || // Outside left
      ((y + h - 1) < 0) || // Outside top
      (x > _max_x) ||      // Outside right
      (y > _max_y)         // Outside bottom
  )
  {
    return;
  }
  else
  {
    int16_t x_skip = 0;
    if ((y + h - 1) > _max_y)
    {
      h -= (y + h - 1) - _max_y;
    }
    if (y < 0)
    {
      bitmap -= y * w;
      h += y;
      y = 0;
    }
    if ((x + w - 1) > _max_x)
    {
      x_skip = (x + w - 1) - _max_x;
      w -= x_skip;
    }
    if (x < 0)
    {
      bitmap -= x;
      x_skip -= x;
      w += x;
      x = 0;
    }
    uint16_t *row = _framebuffer;
    row += y * _width;
    row += x;
    int16_t i;
    int16_t wi;
    uint16_t p;
    while (h--)
    {
      i = 0;
      wi = w;
      while (wi >= 4)
      {
        uint32_t b32 = *((uint32_t *)bitmap);
        p = (b32 & 0xffff);
        if (p != transparent_color)
        {
          row[i] = p;
        }
        ++i;
        p = (b32 & 0xffff0000) >> 16;
        if (p != transparent_color)
        {
          row[i] = p;
        }
        ++i;
        wi -= 2;
        bitmap += 2;
      }
      while (i < w)
      {
        p = *bitmap++;
        if (p != transparent_color)
        {
          row[i] = p;
        }
        ++i;
      }
      bitmap += x_skip;
      row += _width;
    }
  }
}

void Arduino_Canvas::draw16bitBeRGBBitmap(int16_t x, int16_t y,
                                          uint16_t *bitmap, int16_t w, int16_t h)
{
  if (
      ((x + w - 1) < 0) || // Outside left
      ((y + h - 1) < 0) || // Outside top
      (x > _max_x) ||      // Outside right
      (y > _max_y)         // Outside bottom
  )
  {
    return;
  }
  else
  {
    int16_t x_skip = 0;
    if ((y + h - 1) > _max_y)
    {
      h -= (y + h - 1) - _max_y;
    }
    if (y < 0)
    {
      bitmap -= y * w;
      h += y;
      y = 0;
    }
    if ((x + w - 1) > _max_x)
    {
      x_skip = (x + w - 1) - _max_x;
      w -= x_skip;
    }
    if (x < 0)
    {
      bitmap -= x;
      x_skip -= x;
      w += x;
      x = 0;
    }
    uint16_t *row = _framebuffer;
    row += y * _width;
    row += x;
    uint16_t color;
    for (int j = 0; j < h; j++)
    {
      for (int i = 0; i < w; i++)
      {
        color = *bitmap++;
        MSB_16_SET(row[i], color);
      }
      bitmap += x_skip;
      row += _width;
    }
  }
}

void Arduino_Canvas::flush()
{
  if (_output)
  {
    _output->draw16bitRGBBitmap(_output_x, _output_y, _framebuffer, WIDTH, HEIGHT);
  }
}

void Arduino_Canvas::flushQuad(void)
{
  int16_t y = _output_y;
  uint16_t *row1 = _framebuffer;
  uint16_t *row2 = _framebuffer + WIDTH;
  if (_output)
  {
    int16_t hQuad = HEIGHT / 2;
    int16_t wQuad = WIDTH / 2;
    if (!_rowBuf)
    {
      _rowBuf = (uint16_t *)malloc(wQuad * 2);
    }
    uint16_t p;
    while (hQuad--)
    {
      for (int16_t i = 0; i < wQuad; ++i)
      {
        p = (*row1++ & 0b1110011110011100) >> 2;
        p += (*row1++ & 0b1110011110011100) >> 2;
        p += (*row2++ & 0b1110011110011100) >> 2;
        p += (*row2++ & 0b1110011110011100) >> 2;
        _rowBuf[i] = p;
      }
      _output->draw16bitRGBBitmap(_output_x, _output_y + y++, _rowBuf, wQuad, 1);
      row1 += WIDTH;
      row2 += WIDTH;
    }
  }
}

uint16_t *Arduino_Canvas::getFramebuffer()
{
  return _framebuffer;
}

#endif // !defined(LITTLE_FOOT_PRINT)