Dogcows Code - chaz/openbox/blob - otk/rendercontrol.hh

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2 #ifndef __rendercontrol_hh
   3 #define __rendercontrol_hh
   4
   5 extern "C" {
   6 #include <X11/Xlib.h>
   7 #include <X11/Xutil.h>
   8 }
   9
  10 namespace otk {
  11
  12 class ScreenInfo;
  13 class Surface;
  14 class RenderTexture;
  15
  16 class RenderControl {
  17 protected:
  18   const ScreenInfo *_screen;
  19
  20   int _red_bits;
  21   int _green_bits;
  22   int _blue_bits;
  23
  24   // color tables, meaning, 256 (possibly) different shades of each color,
  25   // based on the number of bits there are available for each color in the
  26   // visual
  27   unsigned char _red_color_table[256];
  28   unsigned char _green_color_table[256];
  29   unsigned char _blue_color_table[256];
  30
  31 /*
  32   Bool _dither;
  33
  34   int _cpc; // colors-per-channel: must be a value between [2,6]
  35   int _bpp; // bits-per-pixel
  36
  37   unsigned int *_grad_xbuffer;
  38   unsigned int *_grad_ybuffer;
  39   unsigned int _grad_buffer_width;
  40   unsigned int _grad_buffer_height;
  41
  42   unsigned long *_sqrt_table;
  43
  44   // These values are all determined based on a visual
  45
  46   int _red_bits;    // the number of bits (1-255) that each shade of color
  47   int _green_bits;  // spans across. best case is 1, which gives 255 shades.
  48   int _blue_bits;
  49   unsigned char _red_color_table[256];
  50   unsigned char _green_color_table[256];
  51   unsigned char _blue_color_table[256];
  52
  53   // These are only used for TrueColor visuals
  54   int _red_offset;  // the offset of each color in a color mask
  55   int _green_offset;
  56   int _blue_offset;
  57
  58   // These are only used for !TrueColor visuals
  59   XColor *_colors;
  60   int _ncolors;
  61 */
  62
  63   RenderControl(const ScreenInfo *screen);
  64
  65 public:
  66   virtual ~RenderControl();
  67
  68   static RenderControl *getRenderControl(int screen);
  69
  70   virtual void drawBackground(Surface *sf,
  71                               const RenderTexture &texture) const = 0;
  72 };
  73
  74 }
  75
  76 #endif // __rendercontrol_hh