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#ifndef PPMDFONT_INCLUDED
#define PPMDFONT_INCLUDED
#include <stdio.h>
/* A font file has the following format, with proper packing:
struct ppmd_fontHeader fontHeader;
struct {
struct ppmd_glyphHeader glyphHeader;
struct ppmd_glyphCommand glyphCommand[N];
} glyph[M]
Where:
M is fontHeader.characterCount
N is glyphHeader.commandCount
glyph[i] is the glyph for code point Q,
where i = Q - fontHeader.firstCodePoint
*/
struct ppmd_fontHeader {
char signature[8]; /* "ppmdfont" */
unsigned char format; /* 0x01 */
unsigned char characterCount;
/* Number of characters in this font */
unsigned char firstCodePoint;
/* lowest code point in the font */
};
struct ppmd_glyphHeader {
unsigned char commandCount;
/* Number of struct glyphCommand that follow */
unsigned char skipBefore;
unsigned char skipAfter;
};
enum ppmd_glyphCommandVerb {CMD_NOOP = 0,
CMD_DRAWLINE = 1,
CMD_MOVEPEN = 2
};
struct ppmd_glyphCommand {
enum ppmd_glyphCommandVerb verb;
unsigned char x;
unsigned char y;
};
struct ppmd_glyph {
struct ppmd_glyphHeader header;
const struct ppmd_glyphCommand * commandList;
};
struct ppmd_font {
struct ppmd_fontHeader header;
const struct ppmd_glyph * glyphTable;
};
void
ppmd_set_font(const struct ppmd_font * const newFontP);
const struct ppmd_font *
ppmd_get_font(void);
void
ppmd_read_font(FILE * const ifP,
const struct ppmd_font ** const fontPP);
void
ppmd_free_font(const struct ppmd_font * const fontP);
#endif
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