Added NeoPixel player example

Author: Laurence Bank

examples/NeoPixel_Player/NeoPixelPlayer.ino

@@ -0,0 +1,89 @@
+//
+// LOLRGB GIF player example
+//
+// Written by Larry Bank
+//
+// This Arduino example sketch demonstrates how to play animated GIF images
+// on the UnexpectedMaker 5x14 RGB LED shield. This code depends on two libraries
+// (both are available from the Arduino library manager), my AnimatedGIF library and
+// Adafruit's NeoPixel.
+//
+#include <AnimatedGIF.h>
+#include "rainbow_5x14.h"
+
+#include <Adafruit_NeoPixel.h>
+
+// Which pin on the Arduino is connected to the NeoPixels?
+#define PIN        14 // TinyPico + LOLRGB Shield use this GPIO pin
+
+// 5x14 = 70
+#define NUMPIXELS 70
+Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
+AnimatedGIF gif; // static instance of the class uses 22.5K of RAM
+
+// Normal color values are too bright on the LED array, so reduce the values
+#define BRIGHT_SHIFT 3
+
+//
+// GIF decoder callback function
+// called once per line as the image is decoded
+//
+void GIFDraw(GIFDRAW *pDraw)
+{
+uint8_t r, g, b, *s, *p, *pPal = (uint8_t *)pDraw->pPalette;
+int x, y = pDraw->iY + pDraw->y;
+
+    s = pDraw->pPixels;
+    if (pDraw->ucDisposalMethod == 2) // restore to background color
+    {
+      p = &pPal[pDraw->ucBackground * 3];
+      r = p[0] >> BRIGHT_SHIFT; g = p[1] >> BRIGHT_SHIFT; b = p[2] >> BRIGHT_SHIFT;
+      for (x=0; x<pDraw->iWidth; x++)
+      {
+        if (s[x] == pDraw->ucTransparent) {
+           pixels.setPixelColor(((4-x)*14)+y, pixels.Color(r, g, b));
+        }
+      }
+      pDraw->ucHasTransparency = 0;
+    }
+    // Apply the new pixels to the main image
+    if (pDraw->ucHasTransparency) // if transparency used
+    {
+      const uint8_t ucTransparent = pDraw->ucTransparent;
+      for (x=0; x<pDraw->iWidth; x++)
+      {
+        if (s[x] != ucTransparent) {
+           p = &pPal[s[x] * 3];
+           pixels.setPixelColor(((4-x)*14)+y, pixels.Color(p[0]>>BRIGHT_SHIFT, p[1]>>BRIGHT_SHIFT, p[2]>>BRIGHT_SHIFT));
+        }
+      }
+    }
+    else // no transparency, just copy them all
+    {
+      for (x=0; x<pDraw->iWidth; x++)
+      {
+           p = &pPal[s[x] * 3];
+           pixels.setPixelColor(((4-x)*14)+y, pixels.Color(p[0]>>BRIGHT_SHIFT, p[1]>>BRIGHT_SHIFT, p[2]>>BRIGHT_SHIFT));
+      }
+    }
+    if (pDraw->y == pDraw->iHeight-1) // last line has been decoded, display the image
+      pixels.show();
+} /* GIFDraw() */
+
+void setup() {
+  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
+  pixels.clear();
+  gif.begin(GIF_PALETTE_RGB888); // request 24-bit palette
+} /* setup() */
+
+void loop() {
+  int rc;
+  // This 13K GIF image is compiled with the sketch and read from FLASH memory
+  rc = gif.open((uint8_t *)rainbow_5x14, sizeof(rainbow_5x14), GIFDraw);
+  if (rc) {
+    while (rc) {
+      rc = gif.playFrame(true, NULL); // play a frame and pause for the correct amount of time
+    }
+    gif.close();
+  }
+} /* loop() */