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 reduceDepth(Surface &sf, XImage *im) const = 0;
  69
  70   inline void highlight(pixel32 *x, pixel32 *y, bool raised) const;
  71   void verticalGradient(Surface &sf, const RenderTexture &texture) const;
  72   void diagonalGradient(Surface &sf, const RenderTexture &texture) const;
  73   void crossDiagonalGradient(Surface &sf, const RenderTexture &texture) const;
  74   virtual void drawGradientBackground(Surface &sf,
  75                                       const RenderTexture &texture) const;
  76   virtual void drawSolidBackground(Surface& sf,
  77                                    const RenderTexture& texture) const;
  78
  79 public:
  80   virtual ~RenderControl();
  81
  82   static RenderControl *getRenderControl(int screen);
  83
  84   virtual void drawRoot(const RenderColor &color) const;
  85
  86   //! Draws a background onto a Surface, as specified by a RenderTexture
  87   /*!
  88     This function will overwrite the entire surface.
  89   */
  90   virtual void drawBackground(Surface &sf,
  91                               const RenderTexture &texture) const;
  92
  93   //! Draws an image onto the surface
  94   /*!
  95     This function will overwrite the entire surface.<br>
  96     The image must be specified in 32-bit packed ARGB format. The current
  97     background will be used for applying the alpha.
  98   */
  99   virtual void drawImage(Surface &sf, int w, int h,
 100                          unsigned long *data) const;
 101
 102   //! Draws a string onto a Surface
 103   virtual void drawString(Surface &sf, const Font &font, int x, int y,
 104                           const RenderColor &color,
 105                           const ustring &string) const;
 106
 107   //! Draws a PixmapMask with a specified color onto a Surface
 108   virtual void drawMask(Surface &sf, const RenderColor &color,
 109                         const PixmapMask &mask) const;
 110 };
 111
 112 }
 113
 114 #endif // __rendercontrol_hh