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 #include "surface.hh"
  11
  12 namespace otk {
  13
  14 class ScreenInfo;
  15 class RenderTexture;
  16 class Font;
  17 class RenderColor;
  18 class ustring;
  19 class PixmapMask;
  20
  21 class RenderControl {
  22 protected:
  23   int _screen;
  24
  25   /*
  26   // color tables, meaning, 256 (possibly) different shades of each color,
  27   // based on the number of bits there are available for each color in the
  28   // visual
  29   unsigned char _red_color_table[256];
  30   unsigned char _green_color_table[256];
  31   unsigned char _blue_color_table[256];
  32   */
  33
  34 /*
  35   Bool _dither;
  36
  37   int _cpc; // colors-per-channel: must be a value between [2,6]
  38   int _bpp; // bits-per-pixel
  39
  40   unsigned int *_grad_xbuffer;
  41   unsigned int *_grad_ybuffer;
  42   unsigned int _grad_buffer_width;
  43   unsigned int _grad_buffer_height;
  44
  45   unsigned long *_sqrt_table;
  46
  47   // These values are all determined based on a visual
  48
  49   int _red_bits;    // the number of bits (1-255) that each shade of color
  50   int _green_bits;  // spans across. best case is 1, which gives 255 shades.
  51   int _blue_bits;
  52   unsigned char _red_color_table[256];
  53   unsigned char _green_color_table[256];
  54   unsigned char _blue_color_table[256];
  55
  56   // These are only used for TrueColor visuals
  57   int _red_offset;  // the offset of each color in a color mask
  58   int _green_offset;
  59   int _blue_offset;
  60
  61   // These are only used for !TrueColor visuals
  62   XColor *_colors;
  63   int _ncolors;
  64 */
  65
  66   RenderControl(int screen);
  67
  68   virtual void drawSolidBackground(Surface& sf,
  69                                    const RenderTexture& texture) const;
  70
  71 public:
  72   virtual ~RenderControl();
  73
  74   static RenderControl *getRenderControl(int screen);
  75
  76   virtual void drawRoot(const RenderColor &color) const;
  77
  78   //! Draws a background onto a Surface, as specified by a RenderTexture
  79   /*!
  80     This function will overwrite the entire surface.
  81   */
  82   virtual void drawBackground(Surface &sf,
  83                               const RenderTexture &texture) const = 0;
  84
  85   //! Draws an image onto the surface
  86   /*!
  87     This function will overwrite the entire surface.<br>
  88     The image must be specified in 32-bit packed ARGB format. The current
  89     background will be used for applying the alpha.
  90   */
  91   virtual void drawImage(Surface &sf, int w, int h,
  92                          unsigned long *data) const = 0;
  93
  94   //! Draws a string onto a Surface
  95   virtual void drawString(Surface &sf, const Font &font, int x, int y,
  96                           const RenderColor &color,
  97                           const ustring &string) const;
  98
  99   //! Draws a PixmapMask with a specified color onto a Surface
 100   virtual void drawMask(Surface &sf, const RenderColor &color,
 101                         const PixmapMask &mask) const;
 102 };
 103
 104 }
 105
 106 #endif // __rendercontrol_hh