Added support for multicolor pixmaps in drawRGBBitmap.

Author: marcmerlin

Adafruit_GFX.cpp

@@ -403,6 +403,20 @@ void Adafruit_GFX::drawXBitmap(int16_t x, int16_t y,
   }
 }
 
+// Draw colored bitmap (each pixel is a uint16_t, with colors defined by
+// the drawpixel method of your graphical backend.
+void Adafruit_GFX::drawRGBBitmap(int16_t x, int16_t y,
+			      const uint16_t *bitmap, int16_t w, int16_t h) {
+  int16_t i, j;
+
+  for(j=0; j<h; j++) {
+    for(i=0; i<w; i++ ) {
+	drawPixel(x+i, y+j, pgm_read_byte(bitmap + j * w + i));
+    }
+  }
+}
+
+
 #if ARDUINO >= 100
 size_t Adafruit_GFX::write(uint8_t c) {
 #else

Adafruit_GFX.h

@@ -52,6 +52,8 @@ class Adafruit_GFX : public Print {
       int16_t w, int16_t h, uint16_t color, uint16_t bg),
     drawXBitmap(int16_t x, int16_t y, const uint8_t *bitmap, 
       int16_t w, int16_t h, uint16_t color),
+    drawRGBBitmap(int16_t x, int16_t y, const uint16_t *bitmap,
+      int16_t w, int16_t h),
     drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color,
       uint16_t bg, uint8_t size),
     setCursor(int16_t x, int16_t y),