/* * osd.h: Abstract On Screen Display layer * * See the main source file 'vdr.c' for copyright information and * how to reach the author. * * $Id: osd.h 1.44 2004/06/05 11:40:12 kls Exp $ */ #ifndef __OSD_H #define __OSD_H #include #include #include "font.h" #define MAXNUMCOLORS 256 enum { //AARRGGBB clrTransparent = 0x00000000, clrGray50 = 0x7F000000, // 50% gray clrBlack = 0xFF000000, clrRed = 0xFFFC1414, clrGreen = 0xFF24FC24, clrYellow = 0xFFFCC024, clrMagenta = 0xFFB000FC, clrBlue = 0xFF0000FC, clrCyan = 0xFF00FCFC, clrWhite = 0xFFFCFCFC, }; enum eOsdError { oeOk, oeTooManyAreas, oeTooManyColors, oeBppNotSupported, oeAreasOverlap, oeWrongAlignment, oeOutOfMemory, oeUnknown, }; typedef uint32_t tColor; typedef uint8_t tIndex; class cPalette { private: tColor color[MAXNUMCOLORS]; int bpp; int maxColors, numColors; bool modified; protected: typedef tIndex tIndexes[MAXNUMCOLORS]; public: cPalette(int Bpp = 8); ///< Initializes the palette with the given color depth. int Bpp(void) { return bpp; } void Reset(void); ///< Resets the palette, making it contain no colors. int Index(tColor Color); ///< Returns the index of the given Color (the first color has index 0). ///< If Color is not yet contained in this palette, it will be added if ///< there is a free slot. If the color can't be added to this palette, ///< 0 will be returned. tColor Color(int Index) { return Index < maxColors ? color[Index] : 0; } ///< Returns the color at the given Index. If Index is outside the valid ///< range, 0 will be returned. void SetBpp(int Bpp); ///< Sets the color depth of this palette to the given value. ///< The palette contents will be reset, so that it contains no colors. void SetColor(int Index, tColor Color); ///< Sets the palette entry at Index to Color. If Index is larger than ///< the number of currently used entries in this palette, the entries ///< in between will have undefined values. const tColor *Colors(int &NumColors); ///< Returns a pointer to the complete color table and stores the ///< number of valid entries in NumColors. If no colors have been ///< stored yet, NumColors will be set to 0 and the function will ///< return NULL. void Take(const cPalette &Palette, tIndexes *Indexes = NULL, tColor ColorFg = 0, tColor ColorBg = 0); ///< Takes the colors from the given Palette and adds them to this palette, ///< using existing entries if possible. If Indexes is given, it will be ///< filled with the index values that each color of Palette has in this ///< palette. If either of ColorFg or ColorBg is not zero, the first color ///< in Palette will be taken as ColorBg, and the second color will become ///< ColorFg. }; enum eTextAlignment { taCenter = 0x00, taLeft = 0x01, taRight = 0x02, taTop = 0x04, taBottom = 0x08, taDefault = taTop | taLeft }; class cBitmap : public cPalette { private: tIndex *bitmap; int x0, y0; int width, height; int dirtyX1, dirtyY1, dirtyX2, dirtyY2; public: cBitmap(int Width, int Height, int Bpp, int X0 = 0, int Y0 = 0); ///< Creates a bitmap with the given Width, Height and color depth (Bpp). ///< X0 and Y0 define the offset at which this bitmap will be located on the OSD. ///< All coordinates given in the other functions will be relative to ///< this offset (unless specified otherwise). cBitmap(const char *FileName); ///< Creates a bitmap and loads an XPM image from the given file. cBitmap(char *Xpm[]); ///< Creates a bitmap from the given XPM data. virtual ~cBitmap(); int X0(void) const { return x0; } int Y0(void) const { return y0; } int Width(void) const { return width; } int Height(void) const { return height; } void SetSize(int Width, int Height); ///< Sets the size of this bitmap to the given values. Any previous ///< contents of the bitmap will be lost. If Width and Height are the same ///< as the current values, nothing will happen and the bitmap remains ///< unchanged. bool Contains(int x, int y) const; ///< Returns true if this bitmap contains the point (x, y). bool Covers(int x1, int y1, int x2, int y2) const; ///< Returns true if the rectangle defined by the given coordinates ///< completely covers this bitmap. bool Intersects(int x1, int y1, int x2, int y2) const; ///< Returns true if the rectangle defined by the given coordinates ///< intersects with this bitmap. bool Dirty(int &x1, int &y1, int &x2, int &y2); ///< Tells whether there is a dirty area and returns the bounding ///< rectangle of that area (relative to the bitmaps origin). void Clean(void); ///< Marks the dirty area as clean. bool LoadXpm(const char *FileName); ///< Calls SetXpm() with the data from the file FileName. ///< Returns true if the operation was successful. bool SetXpm(char *Xpm[]); ///< Sets this bitmap to the given XPM data. Any previous bitmap or ///< palette data will be overwritten with the new data. ///< Returns true if the operation was successful. void SetIndex(int x, int y, tIndex Index); ///< Sets the index at the given coordinates to Index. ///< Coordinates are relative to the bitmap's origin. void DrawPixel(int x, int y, tColor Color); ///< Sets the pixel at the given coordinates to the given Color, which is ///< a full 32 bit ARGB value. ///< If the coordinates are outside the bitmap area, no pixel will be set. void DrawBitmap(int x, int y, const cBitmap &Bitmap, tColor ColorFg = 0, tColor ColorBg = 0); ///< Sets the pixels in this bitmap with the data from the given ///< Bitmap, putting the upper left corner of the Bitmap at (x, y). ///< If ColorFg or ColorBg is given, the first palette entry of the Bitmap ///< will be mapped to ColorBg and the second palette entry will be mapped to ///< ColorFg (palette indexes are defined so that 0 is the background and ///< 1 is the foreground color). void DrawText(int x, int y, const char *s, tColor ColorFg, tColor ColorBg, const cFont *Font, int Width = 0, int Height = 0, int Alignment = taDefault); ///< Draws the given string at coordinates (x, y) with the given foreground ///< and background color and font. If Width and Height are given, the text ///< will be drawn into a rectangle with the given size and the given ///< Alignment (default is top-left). If ColorBg is clrTransparent, no ///< background pixels will be drawn, which allows drawing "transparent" text. void DrawRectangle(int x1, int y1, int x2, int y2, tColor Color); ///< Draws a filled rectangle defined by the upper left (x1, y1) and lower right ///< (x2, y2) corners with the given Color. If the rectangle covers the entire ///< bitmap area, the color palette will be reset, so that new colors can be ///< used for drawing. void DrawEllipse(int x1, int y1, int x2, int y2, tColor Color, int Quadrants = 0); ///< Draws a filled ellipse defined by the upper left (x1, y1) and lower right ///< (x2, y2) corners with the given Color. Quadrants controls which parts of ///< the ellipse are actually drawn: ///< 0 draws the entire ellipse ///< 1..4 draws only the first, second, third or fourth quadrant, respectively ///< 5..8 draws the right, top, left or bottom half, respectively ///< -1..-8 draws the inverted part of the given quadrant(s) ///< If Quadrants is not 0, the coordinates are those of the actual area, not ///< the full circle! void DrawSlope(int x1, int y1, int x2, int y2, tColor Color, int Type); ///< Draws a "slope" into the rectangle defined by the upper left (x1, y1) and ///< lower right (x2, y2) corners with the given Color. Type controls the ///< direction of the slope and which side of it will be drawn: ///< 0: horizontal, rising, lower ///< 1: horizontal, rising, upper ///< 2: horizontal, falling, lower ///< 3: horizontal, falling, upper ///< 4: vertical, rising, lower ///< 5: vertical, rising, upper ///< 6: vertical, falling, lower ///< 7: vertical, falling, upper const tIndex *Data(int x, int y); ///< Returns the address of the index byte at the given coordinates. }; struct tArea { int x1, y1, x2, y2; int bpp; int Width(void) const { return x2 - x1 + 1; } int Height(void) const { return y2 - y1 + 1; } bool Intersects(const tArea &Area) const { return !(x2 < Area.x1 || x1 > Area.x2 || y2 < Area.y1 || y1 > Area.y2); } }; #define MAXOSDAREAS 16 class cOsd { private: static bool isOpen; cBitmap *savedRegion; cBitmap *bitmaps[MAXOSDAREAS]; int numBitmaps; int left, top, width, height; public: cOsd(int Left, int Top); ///< Initializes the OSD with the given coordinates. ///< By default it is assumed that the full area will be able to display ///< full 32 bit graphics (ARGB with eight bit for each color and the alpha ///< value, repectively). However, the actual hardware in use may not be ///< able to display such a high resolution OSD, so there is an option to ///< divide the full OSD area into several sub-areas with lower color depths ///< and individual palettes. The sub-areas need not necessarily cover the ///< entire OSD area, but only the OSD area actually covered by sub-areas ///< will be available for drawing. ///< At least one area must be defined in order to set the actual width and ///< height of the OSD. Also, the caller must first try to use an area that ///< consists of only one sub-area that covers the entire drawing space, ///< and should require only the minimum necessary color depth. This is ///< because a derived cOsd class may or may not be able to handle more ///< than one area. virtual ~cOsd(); ///< Shuts down the OSD. static bool IsOpen(void) { return isOpen; } int Left(void) { return left; } int Top(void) { return top; } int Width(void) { return width; } int Height(void) { return height; } cBitmap *GetBitmap(int Area); ///< Returns a pointer to the bitmap for the given Area, or NULL if no ///< such bitmap exists. virtual eOsdError CanHandleAreas(const tArea *Areas, int NumAreas); ///< Checks whether the OSD can display the given set of sub-areas. ///< The return value indicates whether a call to SetAreas() with this ///< set of areas will succeed. CanHandleAreas() may be called with an ///< OSD that is already in use with other areas and will not interfere ///< with the current operation of the OSD. ///< A derived class must first call the base class CanHandleAreas() ///< to check the basic conditions, like not overlapping etc. virtual eOsdError SetAreas(const tArea *Areas, int NumAreas); ///< Sets the sub-areas to the given areas. ///< The return value indicates whether the operation was successful. ///< If an error is reported, nothing will have changed and the previous ///< OSD (if any) will still be displayed as before. ///< If the OSD has been divided into several sub-areas, all areas that ///< are part of the rectangle that surrounds a given drawing operation ///< will be drawn into, with the proper offsets. virtual void SaveRegion(int x1, int y1, int x2, int y2); ///< Saves the region defined by the given coordinates for later restoration ///< through RestoreRegion(). Only one saved region can be active at any ///< given time. virtual void RestoreRegion(void); ///< Restores the region previously saved by a call to SaveRegion(). ///< If SaveRegion() has not been called before, nothing will happen. virtual eOsdError SetPalette(const cPalette &Palette, int Area); ///< Sets the Palette for the given Area (the first area is numbered 0). virtual void DrawPixel(int x, int y, tColor Color); ///< Sets the pixel at the given coordinates to the given Color, which is ///< a full 32 bit ARGB value. ///< If the OSD area has been divided into separate sub-areas, and the ///< given coordinates don't fall into any of these sub-areas, no pixel will ///< be set. virtual void DrawBitmap(int x, int y, const cBitmap &Bitmap, tColor ColorFg = 0, tColor ColorBg = 0); ///< Sets the pixels in the OSD with the data from the given ///< Bitmap, putting the upper left corner of the Bitmap at (x, y). ///< If ColorFg or ColorBg is given, the first palette entry of the Bitmap ///< will be mapped to ColorBg and the second palette entry will be mapped to ///< ColorFg (palette indexes are defined so that 0 is the background and ///< 1 is the foreground color). virtual void DrawText(int x, int y, const char *s, tColor ColorFg, tColor ColorBg, const cFont *Font, int Width = 0, int Height = 0, int Alignment = taDefault); ///< Draws the given string at coordinates (x, y) with the given foreground ///< and background color and font. If Width and Height are given, the text ///< will be drawn into a rectangle with the given size and the given ///< Alignment (default is top-left). If ColorBg is clrTransparent, no ///< background pixels will be drawn, which allows drawing "transparent" text. virtual void DrawRectangle(int x1, int y1, int x2, int y2, tColor Color); ///< Draws a filled rectangle defined by the upper left (x1, y1) and lower right ///< (x2, y2) corners with the given Color. virtual void DrawEllipse(int x1, int y1, int x2, int y2, tColor Color, int Quadrants = 0); ///< Draws a filled ellipse defined by the upper left (x1, y1) and lower right ///< (x2, y2) corners with the given Color. Quadrants controls which parts of ///< the ellipse are actually drawn: ///< 0 draws the entire ellipse ///< 1..4 draws only the first, second, third or fourth quadrant, respectively ///< 5..8 draws the right, top, left or bottom half, respectively ///< -1..-8 draws the inverted part of the given quadrant(s) ///< If Quadrants is not 0, the coordinates are those of the actual area, not ///< the full circle! virtual void DrawSlope(int x1, int y1, int x2, int y2, tColor Color, int Type); ///< Draws a "slope" into the rectangle defined by the upper left (x1, y1) and ///< lower right (x2, y2) corners with the given Color. Type controls the ///< direction of the slope and which side of it will be drawn: ///< 0: horizontal, rising, lower ///< 1: horizontal, rising, upper ///< 2: horizontal, falling, lower ///< 3: horizontal, falling, upper ///< 4: vertical, rising, lower ///< 5: vertical, rising, upper ///< 6: vertical, falling, lower ///< 7: vertical, falling, upper virtual void Flush(void); ///< Actually commits all data to the OSD hardware. }; class cOsdProvider { private: static cOsdProvider *osdProvider; protected: virtual cOsd *CreateOsd(int Left, int Top) = 0; ///< Returns a pointer to a newly created cOsd object, which will be located ///< at the given coordinates. public: cOsdProvider(void); //XXX maybe parameter to make this one "sticky"??? (frame-buffer etc.) virtual ~cOsdProvider(); static cOsd *NewOsd(int Left, int Top); ///< Returns a pointer to a newly created cOsd object, which will be located ///< at the given coordinates. When the cOsd object is no longer needed, the ///< caller must delete it. static void Shutdown(void); ///< Shuts down the OSD provider facility by deleting the current OSD provider. }; class cTextScroller { private: cOsd *osd; int left, top, width, height; const cFont *font; tColor colorFg, colorBg; int offset, shown; cTextWrapper textWrapper; void DrawText(void); public: cTextScroller(void); cTextScroller(cOsd *Osd, int Left, int Top, int Width, int Height, const char *Text, const cFont *Font, tColor ColorFg, tColor ColorBg); void Set(cOsd *Osd, int Left, int Top, int Width, int Height, const char *Text, const cFont *Font, tColor ColorFg, tColor ColorBg); void Reset(void); int Left(void) { return left; } int Top(void) { return top; } int Width(void) { return width; } int Height(void) { return height; } int Total(void) { return textWrapper.Lines(); } int Offset(void) { return offset; } int Shown(void) { return shown; } bool CanScroll(void) { return CanScrollUp() || CanScrollDown(); } bool CanScrollUp(void) { return offset > 0; } bool CanScrollDown(void) { return offset + shown < Total(); } void Scroll(bool Up, bool Page); }; #endif //__OSD_H