GFXFb.h

00001 
00002 #ifndef GFXFB_H
00003 #define GFXFB_H
00004 
00005 #include "Adafruit_GFX.h"
00006 
00007 #define BLACK         0x0000
00008 /* Light gray color, 565 mode */
00009 #define LIGHTGRAY     0X7BEF
00010 /* Dark gray color, 565 mode */
00011 #define DARKGRAY      0x39E7
00012 /* White color, 565 mode */
00013 #define WHITE         0xffff
00014 /* Red color, 565 mode */
00015 #define RED           0xF800
00016 /* Green color, 565 mode */
00017 #define GREEN         0x07E0
00018 /* Blue color, 565 mode */
00019 #define BLUE          0x001F
00020 /* Magenta color, 565 mode */
00021 #define MAGENTA       (RED | BLUE)
00022 /* Cyan color, 565 mode */
00023 #define CYAN          (GREEN | BLUE)
00024 /* Yellow color, 565 mode */
00025 #define YELLOW        (RED | GREEN)
00026 /* Light red color, 565 mode */
00027 #define LIGHTRED      0x7800
00028 /* Light green color, 565 mode */
00029 #define LIGHTGREEN    0x03E0
00030 /* Light blue color, 565 mode */
00031 #define LIGHTBLUE     0x000F
00032 /* Light magenta color, 565 mode */
00033 #define LIGHTMAGENTA  (LIGHTRED | LIGHTBLUE)
00034 /* Light cyan color, 565 mode */
00035 #define LIGHTCYAN     (LIGHTGREEN | LIGHTBLUE)
00036 /* Light yellow color, 565 mode */
00037 #define LIGHTYELLOW   (LIGHTRED | LIGHTGREEN)
00038 
00039 /**
00040  * Graphical library based on Adafruit's GFX using a Frame buffer.
00041  */
00042 class GFXFb : public Adafruit_GFX {
00043 public:
00044 
00045     /** Create an interface to the GFX graphical library
00046      *
00047      * @param w width of the display
00048      * @param h height of the display
00049      * @param fb frame buffer that will be used by the graphical library. Can
00050      * be set by calling setFb instead.
00051      */
00052     GFXFb(uint16_t w, uint16_t h, uint16_t* fb = 0);
00053 
00054     virtual void drawPixel(int16_t x, int16_t y, uint16_t color);
00055     virtual void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
00056     virtual void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
00057     virtual void fillScreen(uint16_t color);
00058 
00059     /** Associate a frame buffer with the graphical library.
00060      *  All drawing requests will be performed on the frame buffer.
00061      *
00062      * @param fb frame buffer that will be used by the graphical library
00063      */
00064     void setFb(uint16_t* fb) {_fb = fb;}
00065 
00066     /** Get the frame buffer associated with the graphical library.
00067      *
00068      * @returns the frame buffer associated with the graphical library.
00069      */
00070     uint16_t* getFb() {return _fb;}
00071 
00072     /** Write a null-terminated string
00073      *
00074      * @param s the string to write on the display
00075      */
00076     void writeString(const char* s);
00077 
00078     /** Get the width in pixels of the given string.
00079      *
00080      * @param s width will be calculated on this string
00081      * @returns the width in pixels of the string
00082      */
00083     int16_t getStringWidth(const char* s);
00084 
00085     /** Get the height in pixels of the given string.
00086      *
00087      * @param s height will be calculated on this string
00088      * @returns the height in pixels of the string
00089      */
00090     int16_t getStringHeight(const char* s);
00091 
00092 
00093 private:
00094 
00095     uint16_t* _fb;
00096 };
00097 
00098 #endif
00099 
00100