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 class Font;
  16 class RenderColor;
  17 class ustring;
  18
  19 class RenderControl {
  20 protected:
  21   int _screen;
  22
  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 /*
  33   Bool _dither;
  34
  35   int _cpc; // colors-per-channel: must be a value between [2,6]
  36   int _bpp; // bits-per-pixel
  37
  38   unsigned int *_grad_xbuffer;
  39   unsigned int *_grad_ybuffer;
  40   unsigned int _grad_buffer_width;
  41   unsigned int _grad_buffer_height;
  42
  43   unsigned long *_sqrt_table;
  44
  45   // These values are all determined based on a visual
  46
  47   int _red_bits;    // the number of bits (1-255) that each shade of color
  48   int _green_bits;  // spans across. best case is 1, which gives 255 shades.
  49   int _blue_bits;
  50   unsigned char _red_color_table[256];
  51   unsigned char _green_color_table[256];
  52   unsigned char _blue_color_table[256];
  53
  54   // These are only used for TrueColor visuals
  55   int _red_offset;  // the offset of each color in a color mask
  56   int _green_offset;
  57   int _blue_offset;
  58
  59   // These are only used for !TrueColor visuals
  60   XColor *_colors;
  61   int _ncolors;
  62 */
  63
  64   RenderControl(int screen);
  65
  66   virtual void drawSolidBackground(Surface& sf,
  67                                    const RenderTexture& texture) const;
  68
  69 public:
  70   virtual ~RenderControl();
  71
  72   static RenderControl *getRenderControl(int screen);
  73
  74   virtual void drawRoot(const RenderColor &color) const;
  75
  76   //! Draws a string onto a Surface
  77   virtual void drawString(Surface &sf, const Font &font, int x, int y,
  78                           const RenderColor &color,
  79                           const ustring &string) const;
  80
  81   //! Draws a background onto a Surface, as specified by a RenderTexture
  82   virtual void drawBackground(Surface &sf,
  83                               const RenderTexture &texture) const = 0;
  84 };
  85
  86 }
  87
  88 #endif // __rendercontrol_hh