added the TFT display library

libraries/TFT/utility/PImage.h

@@ -0,0 +1,64 @@
+
+
+#ifndef _PIMAGE_H
+#define _PIMAGE_H
+
+class Adafruit_GFX;
+
+#if defined(__SD_H__)  // Arduino SD library
+
+
+/// This class mimics Processing's PImage, but with fewer
+/// capabilities. It allows an image stored in the SD card to be
+/// drawn to the display.
+/// @author Enrico Gueli <enrico.gueli@gmail.com>
+class PImage {
+public:
+  PImage() : 
+    _valid(false), 
+    _bmpWidth(0), 
+    _bmpHeight(0) { }
+  
+  void draw(Adafruit_GFX & glcd, int16_t x, int16_t y);
+  
+  static PImage loadImage(const char * fileName);
+  
+  
+  bool isValid() { return _valid; }
+  
+  int width() { return _bmpWidth; }
+  int height() { return _bmpHeight; }
+  
+private:
+  friend class Adafruit_GFX;
+  
+  File _bmpFile;
+  int  _bmpWidth, _bmpHeight;   // W+H in pixels
+  uint8_t  _bmpDepth;              // Bit depth (currently must be 24)
+  uint32_t _bmpImageoffset;        // Start of image data in file
+  uint32_t _rowSize;               // Not always = bmpWidth; may have padding
+  bool     _flip; 
+  
+  bool     _valid;
+  
+  PImage(File & bmpFile, int bmpWidth, int bmpHeight, uint8_t  bmpDepth, uint32_t bmpImageoffset, uint32_t rowSize, bool     flip) : 
+  _bmpFile(bmpFile),
+  _bmpWidth(bmpWidth),
+  _bmpHeight(bmpHeight),
+  _bmpDepth(bmpDepth),
+  _bmpImageoffset(bmpImageoffset),
+  _rowSize(rowSize),
+  _flip(flip),
+  _valid(true) // since Adafruit_GFX is friend, we could just let it write the variables and save some CPU cycles
+  { }
+  
+  static uint16_t read16(File f);
+  static uint32_t read32(File f);
+  
+  // TODO close the file in ~PImage and PImage(const PImage&)
+
+};
+
+#endif
+
+#endif // _PIMAGE_H