Testing a virtual display buffer

PatternPlasmaMLE.ino

/*
 * Portions of this code are adapted from Aurora: https://github.com/pixelmatix/aurora
 * Copyright (c) 2014 Jason Coon
 *
 * Portions of this code are adapted from LedEffects Plasma by Robert Atkins: https://bitbucket.org/ratkins/ledeffects/src/26ed3c51912af6fac5f1304629c7b4ab7ac8ca4b/Plasma.cpp?at=default
 * Copyright (c) 2013 Robert Atkins
 *
 * 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.
 */
 
//#define USE_CUSTOM_PINS // uncomment to use custom pins, then provide below

#define A_PIN  26
#define B_PIN  4
#define C_PIN  27
#define D_PIN  2
#define E_PIN  21 

#define R1_PIN   5
#define R2_PIN  19
#define G1_PIN  17
#define G2_PIN  16
#define B1_PIN  18
#define B2_PIN  25

#define CLK_PIN  14
#define LAT_PIN  15
#define OE_PIN  13
 
 
#include <ESP32-RGB64x32MatrixPanel-I2S-DMA.h>
RGB64x32MatrixPanel_I2S_DMA dma_display;

#include <FastLED.h>

#include "virtualGFX.h"

int time_counter = 0;
int cycles = 0;


CRGBPalette16 currentPalette;
CRGB currentColor;


CRGB ColorFromCurrentPalette(uint8_t index = 0, uint8_t brightness = 255, TBlendType blendType = LINEARBLEND) {
  return ColorFromPalette(currentPalette, index, brightness, blendType);
}
#define NUM_ROWS 1 // Number of rows panels in your overall display
#define NUM_COLS 1 // number of panels in each row

#define PANEL_RES_X 64 // Number of pixels wide of each indivdual panel e.g. pixel purse has 32 
#define PANEL_RES_Y 64 // Number of pixels tall of each panel e.g. pixel purse has 16

int vResX = NUM_COLS * PANEL_RES_X;
int vResY = NUM_ROWS * PANEL_RES_Y;
VirtualGFX virtualDisp(dma_display, NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, vResX, vResY);

void setup() {
  
  Serial.begin(115200);
  
  Serial.println("*****************************************************");
  Serial.println(" HELLO !");
  Serial.println("*****************************************************");

#ifdef USE_CUSTOM_PINS
  dma_display.begin(R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN );  // setup the LED matrix
#else
  dma_display.begin();
#endif
 
  // fill the screen with 'black'
  //dma_display.fillScreen(dma_display.color444(0, 0, 0));
  virtualDisp.fillScreen(dma_display.color444(0, 0, 0));

  // Set current FastLED palette
  currentPalette = RainbowColors_p;

}



void loop() {
  
   for (int x = 0; x <  virtualDisp.width(); x++) {
            for (int y = 0; y <  virtualDisp.height(); y++) {
                int16_t v = 0;
                uint8_t wibble = sin8(time_counter);
                v += sin16(x * wibble * 3 + time_counter);
                v += cos16(y * (128 - wibble)  + time_counter);
                v += sin16(y * x * cos8(-time_counter) / 8);

				currentColor = ColorFromPalette(currentPalette, (v >> 8) + 127); //, brightness, currentBlendType);
				virtualDisp.drawPixelRGB888(x, y, currentColor.r, currentColor.g, currentColor.b);
				
            }
        }

        time_counter += 1;
        cycles++;

        if (cycles >= 2048) {
            time_counter = 0;
            cycles = 0;
        }
        
} // end loop

virtualGFX.h

#ifndef VIRTUAL_GFX_H
#define VIRTUAL_GFX_H

struct VirtualCoords {
  int16_t x;
  int16_t y;
};

class VirtualGFX : public Adafruit_GFX
{

  public:
    int16_t virtualResX;
    int16_t virtualResY;

    int16_t rows;
    int16_t cols;

    int16_t screenResX;
    int16_t screenResY;

    RGB64x32MatrixPanel_I2S_DMA *display;

    VirtualGFX(RGB64x32MatrixPanel_I2S_DMA &disp, int vRows, int vCols, int screenX, int screenY, int vResX, int vResY)
      : Adafruit_GFX(vResX, vResY)
    {
      this->display = &disp;
      rows = vRows;
      cols = vCols;
      screenResX = screenX;
      screenResY = screenY;

      virtualResX = vResX;
      virtualResY = vResY;
    }

    virtual void drawPixel(int16_t x, int16_t y, uint16_t color);
    void drawPixelRGB888(int16_t x, int16_t y, uint8_t r, uint8_t g, uint8_t b);
    virtual void fillScreen(uint16_t color);                        // overwrite adafruit implementation


    VirtualCoords getCoords(int16_t x, int16_t y);
}; // end Class header

inline VirtualCoords VirtualGFX::getCoords(int16_t x, int16_t y) {
  VirtualCoords coords;
  int16_t xOffset = (y / screenResY) * (cols * screenResX);
  coords.x = x + xOffset;
  coords.y = y % screenResY;
  return coords;
}

inline void VirtualGFX::drawPixel(int16_t x, int16_t y, uint16_t color)
{
  VirtualCoords coords = getCoords(x, y);
  this->display->drawPixel(coords.x, coords.y, color);
}

inline void VirtualGFX::fillScreen(uint16_t color)  // adafruit virtual void override
{
  this->display->fillScreen(color);
}

inline void VirtualGFX::drawPixelRGB888(int16_t x, int16_t y, uint8_t r, uint8_t g, uint8_t b)
{
  VirtualCoords coords = getCoords(x, y);
  this->display->drawPixelRGB888( coords.x, coords.y, r, g, b);
}
#endif