diff options
Diffstat (limited to 'osd.h')
| -rw-r--r-- | osd.h | 33 |
1 files changed, 24 insertions, 9 deletions
@@ -4,7 +4,7 @@ * See the main source file 'vdr.c' for copyright information and * how to reach the author. * - * $Id: osd.h 1.57 2007/08/26 09:45:38 kls Exp $ + * $Id: osd.h 1.58 2007/10/12 14:28:44 kls Exp $ */ #ifndef __OSD_H @@ -17,6 +17,9 @@ #include "font.h" #include "tools.h" +#define OSD_LEVEL_DEFAULT 0 +#define OSD_LEVEL_SUBTITLES 10 + #define MAXNUMCOLORS 256 enum { @@ -69,7 +72,7 @@ public: ///< a single color combination, and may not be able to serve all ///< requested colors. By default the palette assumes there will be ///< 10 fixed colors and 10 color combinations. - int Bpp(void) { return bpp; } + int Bpp(void) const { return bpp; } void Reset(void); ///< Resets the palette, making it contain no colors. int Index(tColor Color); @@ -77,7 +80,7 @@ public: ///< 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, ///< the closest existing color will be returned. - tColor Color(int Index) { return Index < maxColors ? color[Index] : 0; } + tColor Color(int Index) const { 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); @@ -87,7 +90,7 @@ public: ///< 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); + const tColor *Colors(int &NumColors) const; ///< 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 @@ -102,14 +105,14 @@ public: void Replace(const cPalette &Palette); ///< Replaces the colors of this palette with the colors from the given ///< palette. - tColor Blend(tColor ColorFg, tColor ColorBg, uint8_t Level); + tColor Blend(tColor ColorFg, tColor ColorBg, uint8_t Level) const; ///< Determines a color that consists of a linear blend between ColorFg ///< and ColorBg. If Level is 0, the result is ColorBg, if it is 255, ///< the result is ColorFg. If SetAntiAliasGranularity() has been called previously, ///< Level will be mapped to a limited range of levels that allow to make best ///< use of the palette entries. - int ClosestColor(tColor Color, int MaxDiff = INT_MAX); - ///< Returns the index of a color in this paltte that is closest to the given + int ClosestColor(tColor Color, int MaxDiff = INT_MAX) const; + ///< Returns the index of a color in this palette that is closest to the given ///< Color. MaxDiff can be used to control the maximum allowed color difference. ///< If no color with a maximum difference of MaxDiff can be found, -1 will ///< be returned. With the default value of INT_MAX, there will always be @@ -232,6 +235,17 @@ public: ///< Returns the address of the index byte at the given coordinates. tColor GetColor(int x, int y) { return Color(*Data(x, y)); } ///< Returns the color at the given coordinates. + void ReduceBpp(const cPalette &Palette); + ///< Reduces the color depth of the bitmap to that of the given Palette. + ///< If Palette's color depth is not smaller than the bitmap's current + ///< color depth, or if it is not one of 4bpp or 2bpp, nothing happens. After + ///< reducing the color depth the current palette is replaced with + ///< the given one. + void ShrinkBpp(int NewBpp); + ///< Shrinks the color depth of the bitmap to NewBpp by keeping only + ///< the 2^NewBpp most frequently used colors as defined in the current palette. + ///< If NewBpp is not smaller than the bitmap's current color depth, + ///< or if it is not one of 4bpp or 2bpp, nothing happens. }; struct tArea { @@ -292,7 +306,7 @@ public: ///< This may be useful for plugins that determine the scaling of the ///< video image and need to scale the OSD accordingly to fit on the ///< screen. - static int IsOpen(void) { return Osds.Size() && Osds[0]->level == 0; } + static int IsOpen(void) { return Osds.Size() && Osds[0]->level == OSD_LEVEL_DEFAULT; } ///< Returns true if there is currently a level 0 OSD open. int Left(void) { return left; } int Top(void) { return top; } @@ -327,6 +341,7 @@ public: ///< 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. + ///< A new call overwrites any previous settings 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 @@ -398,7 +413,7 @@ public: cOsdProvider(void); //XXX maybe parameter to make this one "sticky"??? (frame-buffer etc.) virtual ~cOsdProvider(); - static cOsd *NewOsd(int Left, int Top, uint Level = 0); + static cOsd *NewOsd(int Left, int Top, uint Level = OSD_LEVEL_DEFAULT); ///< 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. If the OSD is already in use, or there is no OSD |