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vdr/font.h

82 lines
2.9 KiB
C++

/*
* font.h: Font handling for the DVB On Screen Display
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: font.h 1.16 2007/06/10 12:58:54 kls Exp $
*/
#ifndef __FONT_H
#define __FONT_H
#include <stdint.h>
#include <stdlib.h>
#define MAXFONTNAME 64
#define MAXFONTSIZE 64
#define FONTDIR "/usr/share/fonts/truetype"
enum eDvbFont {
fontOsd,
fontFix,
fontSml
#define eDvbFontSize (fontSml + 1)
};
class cBitmap;
typedef uint32_t tColor; // see also osd.h
typedef uint8_t tIndex;
class cFont {
private:
static cFont *fonts[];
public:
virtual ~cFont() {}
virtual int Width(uint c) const = 0;
///< Returns the width of the given character in pixel.
virtual int Width(const char *s) const = 0;
///< Returns the width of the given string in pixel.
virtual int Height(void) const = 0;
///< Returns the height of this font in pixel (all characters have the same height).
int Height(const char *s) const { return Height(); }
///< Returns the height of this font in pixel (obsolete, just for backwards compatibilty).
virtual void DrawText(cBitmap *Bitmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const = 0;
///< Draws the given text into the Bitmap at position (x, y) with the given colors.
///< The text will not exceed the given Width (if > 0), and will end with a complete character.
static void SetFont(eDvbFont Font, const char *Name, int CharHeight);
///< Sets the given Font to use the font data from the file Name and make its characters
///< CharHeight pixels high.
static const cFont *GetFont(eDvbFont Font);
///< Gets the given Font, which was previously set by a call to SetFont().
///< If no SetFont() call has been made, the font as defined in the setup is returned.
///< The caller must not use the returned font outside the scope in which
///< it was retrieved by the call to GetFont(), because a call to SetFont()
///< may delete an existing font.
};
class cTextWrapper {
private:
char *text;
char *eol;
int lines;
int lastLine;
public:
cTextWrapper(void);
cTextWrapper(const char *Text, const cFont *Font, int Width);
~cTextWrapper();
void Set(const char *Text, const cFont *Font, int Width);
///< Wraps the Text to make it fit into the area defined by the given Width
///< when displayed with the given Font.
///< Wrapping is done by inserting the necessary number of newline
///< characters into the string.
const char *Text(void);
///< Returns the full wrapped text.
int Lines(void) { return lines; }
///< Returns the actual number of lines needed to display the full wrapped text.
const char *GetLine(int Line);
///< Returns the given Line. The first line is numbered 0.
};
#endif //__FONT_H