Revision 65ad9c7449205552ce1477f495b0c2281b19f447 authored by danne on 10 January 2017, 07:55:06 UTC, committed by danne on 10 January 2017, 07:55:06 UTC
rbf_font.h
#ifndef RBF_FONT_H
#define RBF_FONT_H
// CHDK Font interface
// Note: used in modules and platform independent code.
// Do not add platform dependent stuff in here (#ifdef/#endif compile options or camera dependent values)
//-------------------------------------------------------------------
#define RBF_MAX_NAME 64
//-------------------------------------------------------------------
// Format of header block for each character in the 'font_data' array
// This is immediately followed by 'size' bytes of character data.
typedef struct {
unsigned char charcode[2]; // Don't change this to a short as the data is not aligned in memory
unsigned char offset;
unsigned char size;
} FontData;
// Header as seperate structure so it can be directly loaded from the font file easily
// structure layout maps to file layout - do not change !
typedef struct {
int magic1, magic2; // header magic numbers to identify correct font file
char name[RBF_MAX_NAME]; // name of font (max 64 characters)
int charSize; // # of bytes used to store each character
int points; // font size in points
int height; // font height in pixels
int maxWidth; // width of widest character
int charFirst; // first character #
int charLast; // last character #
int _unknown4; // ?
int _wmapAddr; // offset in font file of wTable array
int _cmapAddr; // offset in font file of cTable array
int descent; // font descent (not used)
int intline; // interline spacing (not used)
} font_hdr;
typedef struct _font {
font_hdr hdr;
// calculated values (after font is loaded)
int charCount; // count of chars containing in font
int width; // font element width in pixels
// Width table
// List of character widths. Elements of list is width of char
char wTable[256];
// Character data
// List of chars. Element of list is a bytecode string, contains pixels representation of char
char *cTable;
// Current size of the cTable data
int cTableSize;
int cTableSizeMax; // max size of cTable (max size currently allocated)
} font;
//-------------------------------------------------------------------
// private functions for bmp.c; for user code, please use BMP and fontspec API (bmp_printf, bmp_string_width, FONT_MED...)
extern int rbf_str_width(font *rbf_font, const char *str);
extern int rbf_str_clipped_width(font *rbf_font, const char *str, int maxlen);
extern int rbf_strlen_clipped(font *rbf_font, const char *str, int maxlen);
extern int rbf_draw_string(font *rbf_font, int x, int y, const char *str, int cl);
//-------------------------------------------------------------------
/* to be called at startup, before init funcs */
void _load_fonts();
#endif
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