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+/*
+ * osdbase.h: Basic interface to the On Screen Display
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: osdbase.h 1.1 2002/05/10 14:26:09 kls Exp $
+ */
+
+#ifndef __OSDBASE_H
+#define __OSDBASE_H
+
+#include <stdio.h>
+#include "font.h"
+
+#define MAXNUMCOLORS 16
+
+enum eDvbColor {
+#ifdef DEBUG_OSD
+  clrBackground,
+  clrTransparent = clrBackground,
+  clrBlack = clrBackground,
+  clrRed,
+  clrGreen,
+  clrYellow,
+  clrBlue,
+  clrMagenta,
+  clrCyan,
+  clrWhite,
+#else
+  clrTransparent = 0x00000000,
+  clrBackground  = 0x7F000000, // 50% gray
+  clrBlack       = 0xFF000000,
+  clrRed         = 0xFF1414FC,
+  clrGreen       = 0xFF24FC24,
+  clrYellow      = 0xFF24C0FC,
+  clrMagenta     = 0xFFFC00B0,
+  clrBlue        = 0xFFFC0000,
+  clrCyan        = 0xFFFCFC00,
+  clrWhite       = 0xFFFCFCFC,
+#endif
+  };
+
+class cPalette {
+private:
+  eDvbColor color[MAXNUMCOLORS];
+  int maxColors, numColors;
+  bool used[MAXNUMCOLORS];
+  bool fetched[MAXNUMCOLORS];
+  bool full;
+protected:
+  typedef unsigned char tIndexes[MAXNUMCOLORS];
+public:
+  cPalette(int Bpp);
+  int Index(eDvbColor Color);
+  void Reset(void);
+  const eDvbColor *Colors(int &FirstColor, int &LastColor);
+  void Take(const cPalette &Palette, tIndexes *Indexes = NULL);
+  };
+
+class cBitmap : public cPalette {
+private:
+  cFont *font;
+  eDvbFont fontType;
+  void SetIndex(int x, int y, char Index);
+  char *bitmap;
+  bool clearWithBackground;
+protected:
+  int width, height;
+  int dirtyX1, dirtyY1, dirtyX2, dirtyY2;
+public:
+  cBitmap(int Width, int Height, int Bpp, bool ClearWithBackground = true);
+  virtual ~cBitmap();
+  bool ClearWithBackground(void) { return clearWithBackground; }
+  eDvbFont SetFont(eDvbFont Font);
+  bool Dirty(int &x1, int &y1, int &x2, int &y2);
+  void SetPixel(int x, int y, eDvbColor Color);
+  void SetBitmap(int x, int y, const cBitmap &Bitmap);
+  int Width(void) { return width; }
+  int Width(unsigned char c);
+  int Width(const char *s);
+  int Height(void) { return height; }
+  void Text(int x, int y, const char *s, eDvbColor ColorFg = clrWhite, eDvbColor ColorBg = clrBackground);
+  void Fill(int x1, int y1, int x2, int y2, eDvbColor Color);
+  void Clean(void);
+  void Clear(void);
+  const char *Data(int x, int y);
+  };
+
+#define MAXNUMWINDOWS 7 // OSD windows are counted 1...7
+
+class cWindow : public cBitmap {
+private:
+  int handle;  // the index within the OSD's window array (0...MAXNUMWINDOWS - 1)
+  int x0, y0;
+  int bpp;
+  bool tiled;
+  bool shown;
+public:
+  cWindow(int Handle, int x, int y, int w, int h, int Bpp, bool ClearWithBackground, bool Tiled);
+  int X0(void) { return x0; }
+  int Y0(void) { return y0; }
+  int Bpp(void) { return bpp; }
+  bool Tiled(void) { return tiled; }
+  bool Shown(void) { bool s = shown; shown = true; return s; }
+  int Handle(void) { return handle; }
+  bool Contains(int x, int y);
+  void Relocate(int x, int y);
+  void Fill(int x1, int y1, int x2, int y2, eDvbColor Color);
+  void SetBitmap(int x, int y, const cBitmap &Bitmap);
+  void Text(int x, int y, const char *s, eDvbColor ColorFg = clrWhite, eDvbColor ColorBg = clrBackground);
+  const char *Data(int x, int y);
+  };
+
+typedef int tWindowHandle;
+
+// '-1' is used as an error return value!
+#define ALL_WINDOWS         (-2)
+#define ALL_TILED_WINDOWS   (-3)
+#define LAST_CREATED_WINDOW (-4)
+
+class cOsd {
+private:
+  int numWindows;
+  int x0, y0;
+  cWindow *window[MAXNUMWINDOWS];
+  cWindow *GetWindow(int x, int y);
+  cWindow *GetWindow(tWindowHandle Window);
+protected:
+  cWindow *GetWindowNr(int i) { return i < MAXNUMWINDOWS ? window[i] : NULL; }
+  int NumWindows(void) { return numWindows; }
+  int X0(void) { return x0; }
+  int Y0(void) { return y0; }
+  virtual bool OpenWindow(cWindow *Window) = 0;
+       // Opens the window on the OSD hardware, without actually showing it (the
+       // initial state shall be "hidden").
+  virtual void CommitWindow(cWindow *Window) = 0;
+       // Write any modified data and color definitions to the OSD hardware.
+       // Use the window's Dirty() function to find out which area of data
+       // actually needs to be transferred. If the window has not yet been explicitly
+       // shown through a call to ShowWindow(), no visible activity shall take place.
+  virtual void ShowWindow(cWindow *Window) = 0;
+       // Make the window actually visible on the OSD hardware.
+  virtual void HideWindow(cWindow *Window, bool Hide) = 0;
+       // Temporarily hide the window (if 'Hide' is 'true') or make a previously
+       // hidden window visible again (if 'Hide' is 'false').
+  virtual void MoveWindow(cWindow *Window, int x, int y) = 0;
+       // Move the window to a new location.
+  virtual void CloseWindow(cWindow *Window) = 0;
+       // Close the window and release any OSD hardware resources allocated for it.
+public:
+  cOsd(int x, int y);
+       // Initializes the OSD, starting at screen coordinates (x, y).
+  virtual ~cOsd();
+       // Destroys all windows and shuts down the OSD.
+  tWindowHandle Create(int x, int y, int w, int h, int Bpp, bool ClearWithBackground = true, bool Tiled = true);
+       // Creates a window at coordinates (x, y), which are relative to the OSD's
+       // origin given in the constructor, with the given width, height and color
+       // depth. ClearWithBackground controls whether the window will be filled with
+       // clrBackground when it is cleared. Setting this to 'false' may be useful
+       // for windows that don't need clrBackground but want to save this color
+       // palette entry for a different color. Tiled controls whether this will
+       // be part of a multi section OSD (with several windows that all have
+       // different color depths and palettes and form one large OSD area), or
+       // whether this is a "standalone" window that will be drawn "in front"
+       // of any windows defined *after* this one (this can be used for highlighting
+       // certain parts of the OSD, as would be done in a 'cursor').
+       // Returns a handle that can be used to identify this window.
+  void AddColor(eDvbColor Color, tWindowHandle Window = LAST_CREATED_WINDOW);
+       // Adds the Color to the color palette of the given window if it is not
+       // already contained in the palette (and if the palette still has free
+       // slots for new colors). The default value LAST_CREATED_WINDOW will
+       // access the most recently created window, without the need of explicitly
+       // using a window handle.
+  void Flush(void);
+       // Actually commits all data of all windows to the OSD.
+  void Clear(tWindowHandle Window = ALL_TILED_WINDOWS);
+       // Clears the given window. If ALL_TILED_WINDOWS is given, only the tiled
+       // windows will be cleared, leaving the standalone windows untouched. If
+       // ALL_WINDOWS is given, the standalone windows will also be cleared.
+  void Fill(int x1, int y1, int x2, int y2, eDvbColor Color, tWindowHandle Window = ALL_TILED_WINDOWS);
+       // Fills the rectangle defined by the upper left (x1, y2) and lower right
+       // (x2, y2) corners with the given Color. If a specific window is given,
+       // the coordinates are relative to that window's upper left corner.
+       // Otherwise they are relative to the upper left corner of the entire OSD.
+       // If all tiled windows are selected, only that window which contains the
+       // point (x1, y1) will actually be filled.
+  void SetBitmap(int x, int y, const cBitmap &Bitmap, tWindowHandle Window = ALL_TILED_WINDOWS);
+       // Sets the pixels within the given window with the data from the given
+       // Bitmap. See Fill() for details about the coordinates.
+  int Width(unsigned char c);
+       // Returns the width (in pixels) of the given character in the current font.
+  int Width(const char *s);
+       // Returns the width (in pixels) of the given string in the current font.
+  eDvbFont SetFont(eDvbFont Font);
+       // Sets the current font for subsequent Width() and Text() operations.
+  void Text(int x, int y, const char *s, eDvbColor ColorFg = clrWhite, eDvbColor ColorBg = clrBackground, tWindowHandle Window = ALL_TILED_WINDOWS);
+       // Writes the given string at coordinates (x, y) with the given foreground
+       // and background color into the given window (see Fill() for details
+       // about the coordinates).
+  void Relocate(tWindowHandle Window, int x, int y, int NewWidth = -1, int NewHeight = -1);
+       // Moves the given window to the new location at (x, y). If NewWidth and
+       // NewHeight are also given, the window will also be resized to the new
+       // width and height.
+  void Hide(tWindowHandle Window);
+       // Hides the given window.
+  void Show(tWindowHandle Window);
+       // Shows the given window.
+  };
+
+#endif //__OSDBASE_H