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Arduino_Canvas_Indexed.cpp
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Arduino_Canvas_Indexed.cpp
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/*
* start rewrite from:
* https://github.com/adafruit/Adafruit-GFX-Library.git
*/
#include "Arduino_DataBus.h"
#include "Arduino_GFX.h"
#include "Arduino_Canvas_Indexed.h"
Arduino_Canvas_Indexed::Arduino_Canvas_Indexed(int16_t w, int16_t h, Arduino_G *output, int16_t output_x, int16_t output_y, uint8_t mask_level)
: Arduino_GFX(w, h), _output(output), _output_x(output_x), _output_y(output_y)
{
if (mask_level >= MAXMASKLEVEL)
{
mask_level = MAXMASKLEVEL - 1;
}
_current_mask_level = mask_level;
_color_mask = mask_level_list[_current_mask_level];
}
void Arduino_Canvas_Indexed::begin(int speed)
{
#if defined(ESP32)
if (psramFound())
{
_framebuffer = (uint8_t *)ps_malloc(_width * _height);
}
else
{
_framebuffer = (uint8_t *)malloc(_width * _height);
}
#else
_framebuffer = (uint8_t *)malloc(_width * _height);
#endif
if (!_framebuffer)
{
Serial.println(F("_framebuffer allocation failed."));
}
_output->begin(speed);
_output->fillScreen(BLACK);
}
void Arduino_Canvas_Indexed::writePixelPreclipped(int16_t x, int16_t y, uint16_t color)
{
_framebuffer[((int32_t)y * _width) + x] = get_color_index(color);
}
void Arduino_Canvas_Indexed::writeFastVLine(int16_t x, int16_t y,
int16_t h, uint16_t color)
{
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
uint8_t idx = get_color_index(color);
uint8_t *fb = _framebuffer + ((int32_t)y * _width) + x;
while (h--)
{
*fb = idx;
fb += _width;
}
}
}
}
}
void Arduino_Canvas_Indexed::writeFastHLine(int16_t x, int16_t y,
int16_t w, uint16_t color)
{
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
uint8_t idx = get_color_index(color);
uint8_t *fb = _framebuffer + ((int32_t)y * _width) + x;
while (w--)
{
*(fb++) = idx;
}
}
}
}
}
void Arduino_Canvas_Indexed::flush()
{
_output->drawIndexedBitmap(_output_x, _output_y, _framebuffer, _color_index, _width, _height);
}
uint8_t Arduino_Canvas_Indexed::get_color_index(uint16_t color)
{
color &= _color_mask;
for (uint8_t i = 0; i < _indexed_size; i++)
{
if (_color_index[i] == color)
{
return i;
}
}
if (_indexed_size >= COLOR_IDX_SIZE) // overflowed
{
raise_mask_level();
}
_color_index[_indexed_size] = color;
// Serial.print("color_index[");
// Serial.print(_indexed_size);
// Serial.print("] = ");
// Serial.println(color);
return _indexed_size++;
}
uint16_t Arduino_Canvas_Indexed::get_index_color(uint8_t idx)
{
return _color_index[idx];
}
void Arduino_Canvas_Indexed::raise_mask_level()
{
if ((_current_mask_level + 1) < MAXMASKLEVEL)
{
int buffer_size = _width * _height;
uint8_t old_indexed_size = _indexed_size;
uint8_t new_color;
_indexed_size = 0;
_color_mask = mask_level_list[++_current_mask_level];
Serial.print("Raised mask level: ");
Serial.println(_current_mask_level);
// update _framebuffer color index, it is a time consuming job
for (uint8_t old_color = 0; old_color < old_indexed_size; old_color++)
{
new_color = get_color_index(_color_index[old_color]);
for (int i = 0; i < buffer_size; i++)
{
if (_framebuffer[i] == old_color)
{
_framebuffer[i] = new_color;
}
}
}
}
}