src/YFrameBuffer.h

   1 /*---------------------------------------------------------------------\
   2 |                                                                      |
   3 |                      __   __    ____ _____ ____                      |
   4 |                      \ \ / /_ _/ ___|_   _|___ \                     |
   5 |                       \ V / _` \___ \ | |   __) |                    |
   6 |                        | | (_| |___) || |  / __/                     |
   7 |                        |_|\__,_|____/ |_| |_____|                    |
   8 |                                                                      |
   9 |                               core system                            |
  10 |                                                        (C) SuSE GmbH |
  11 \----------------------------------------------------------------------/
  12
  13   File:       YQFrameBuffer.h
  14
  15   Author:     Stefan Hundhammer <sh@suse.de>
  16
  17 /-*/
  18
  19
  20 #ifndef YFrameBuffer_h
  21 #define YFrameBuffer_h
  22
  23 class YFrameBuffer
  24 {
  25 public:
  26
  27     typedef unsigned short UINT16;
  28     typedef unsigned long UINT32;
  29     typedef UINT32 FBPixel;
  30
  31     /**
  32      * Constructor
  33      **/
  34     YFrameBuffer( int screenWidth, int screenHeight, int bitDepth );
  35
  36     /**
  37      * Destructor
  38      **/
  39     virtual ~YFrameBuffer();
  40
  41     /**
  42      * Set the framebuffer pixel at (x, y)
  43      **/
  44     void setPixel( int x, int y, FBPixel pixel );
  45
  46     /**
  47      * Get the framebuffer pixel value at (x, y)
  48      **/
  49     FBPixel pixel( int x, int y );
  50
  51     /**
  52      * Returns 'true' if the framebuffer is valid, i.e. can be used.
  53      **/
  54     bool valid()        const { return _fb != 0; }
  55
  56     int width()         const { return _width;          }
  57     int height()        const { return _height;         }
  58     int depth()         const { return _depth;          }
  59     int bytesPerPixel() const { return _bytesPerPixel;  }
  60
  61
  62 protected:
  63
  64     /**
  65      * mmap() the framebuffer device
  66      **/
  67     void mmapFB();
  68
  69     /**
  70      * release the mmaped framebuffer
  71      **/
  72     void munmapFB();
  73
  74
  75     //
  76     // Data members
  77     //
  78
  79     int         _width;
  80     int         _height;
  81     int         _depth;
  82
  83     void *      _fb;
  84     int         _fb_fd;
  85     UINT32 *    _fb32;
  86     UINT16 *    _fb16;
  87     size_t      _fb_len;
  88     int         _bytesPerPixel;
  89 };
  90
  91
  92 #endif // ifndef YFrameBuffer_h