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 //  bool _dither;
  26
  27   RenderControl(int screen);
  28
  29   inline void highlight(pixel32 *x, pixel32 *y, bool raised) const;
  30   void verticalGradient(Surface &sf, const RenderTexture &texture) const;
  31   void diagonalGradient(Surface &sf, const RenderTexture &texture) const;
  32   void crossDiagonalGradient(Surface &sf, const RenderTexture &texture) const;
  33   virtual void drawGradientBackground(Surface &sf,
  34                                       const RenderTexture &texture) const;
  35   virtual void drawSolidBackground(Surface& sf,
  36                                    const RenderTexture& texture) const;
  37
  38   //! Reduces a Surface's Surface::pixelData so that it will display correctly
  39   //! on the screen's depth
  40   /*!
  41     This function allocates and sets the im->data member. The allocated memory
  42     will be freed when XDetroyImage is called on the XImage.
  43   */
  44   virtual void reduceDepth(Surface &sf, XImage *im) const = 0;
  45
  46 public:
  47   virtual ~RenderControl();
  48
  49   static RenderControl *getRenderControl(int screen);
  50
  51   //! Draws a background onto a Surface, as specified by a RenderTexture
  52   /*!
  53     This function will overwrite the entire surface.
  54   */
  55   virtual void drawBackground(Surface &sf,
  56                               const RenderTexture &texture) const;
  57
  58   //! Draws an image onto the surface
  59   /*!
  60     This function will overwrite the entire surface.<br>
  61     The image must be specified in 32-bit packed ARGB format. The current
  62     background will be used for applying the alpha.
  63   */
  64   virtual void drawImage(Surface &sf, int w, int h,
  65                          unsigned long *data) const;
  66
  67   //! Draws a string onto a Surface
  68   virtual void drawString(Surface &sf, const Font &font, int x, int y,
  69                           const RenderColor &color,
  70                           const ustring &string) const;
  71
  72   //! Draws a PixmapMask with a specified color onto a Surface
  73   virtual void drawMask(Surface &sf, const RenderColor &color,
  74                         const PixmapMask &mask) const;
  75
  76   virtual void allocateColor(XColor *color) const = 0;
  77 };
  78
  79 }
  80
  81 #endif // __rendercontrol_hh