/*
 * DMLib
 * -- Bitmap font support
 * Programmed and designed by Matti 'ccr' Hamalainen
 * (C) Copyright 2012 Tecnic Software productions (TNSP)
 */
#ifndef DMFONT_H
#define DMFONT_H

#include "dmlib.h"
#include "dmres.h"

#ifdef DM_GFX_TTF_TEXT
#include <SDL_ttf.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

/* Bitmapped fonts and text
 */
#ifdef DM_GFX_BM_TEXT

// DMFONT format constants
#define DMFONT_MAGIC         "DMFONT"
#define DMFONT_VERSION       0x0200

#define DMFONT_MIN_WIDTH     3
#define DMFONT_MIN_HEIGHT    3
#define DMFONT_MAX_WIDTH     128
#define DMFONT_MAX_HEIGHT    128
#define DMFONT_MAX_GLYPHS    1024
#define DMFONT_NPALETTE      256

// Legacy TSFONT loading support
#define TSFONT_MAGIC         "TSFONT"
#define TSFONT_VERSION       0x0205


typedef struct
{
    int width, height,       // Dimensions of this glyph
        index;               // Index to surface, value of "maxglyph" means unused
} DMBitmapGlyph;


typedef struct
{
    int width, height;       // Dimensions
    int nglyphs,             // How many glyphs worth of data is allocated for the surface
        maxglyph;            // Number of character indices, e.g. typically 256
    size_t gsize;            // Size of one glyph in bytes, e.g. glyphs->pitch * font->height

    DMBitmapGlyph *glyphMap;
    SDL_Surface *glyphs;     // Surface containing glyphs
} DMBitmapFont;


DMBitmapFont *dmNewBitmapFont(const int nglyphs, const int maxglyph, const int width, const int height, const int bpp);
int dmFreeBitmapFont(DMBitmapFont *font);
int dmLoadBitmapFont(DMResource *res, DMBitmapFont **pfont);
int dmSetBitmapFontPalette(DMBitmapFont *font, const SDL_Color *pal, const int start, const int size);


void dmDrawBMTextConst(SDL_Surface *screen, const DMBitmapFont *font,
    const BOOL condensed, const int mode, int xc, int yc, const char *str);
void dmDrawBMTextVA(SDL_Surface *screen, const DMBitmapFont *font,
    const BOOL condensed, const int mode, const int xc, const int yc, const char *fmt, va_list ap);
void dmDrawBMText(SDL_Surface *screen, const DMBitmapFont *font,
    const BOOL condensed, const int mode, const int xc, const int yc, const char *fmt, ...);


static inline void dmInitializeGetBMGlyphSurface(SDL_Surface *surf, DMBitmapFont *font)
{
    memcpy(surf, font->glyphs, sizeof(SDL_Surface));
}

static inline void dmGetBMGlyph(SDL_Surface *surf, DMBitmapFont *font, int ch)
{
    DMBitmapGlyph *glyph;
    if (ch < 0 || ch >= font->nglyphs || ch == '\n' || ch == '\r')
        ch = 32;

    memcpy(surf, font->glyphs, sizeof(SDL_Surface));

    glyph = &font->glyphMap[ch];
    surf->w = glyph->width;
    surf->h = glyph->height;
    surf->pixels = font->glyphs->pixels + font->gsize * glyph->index;
}
#endif


/* TTF text drawing
 */
#ifdef DM_GFX_TTF_TEXT
void dmDrawTTFTextConst(SDL_Surface *screen, TTF_Font *font, SDL_Color col, const int xc, const int yc, const char *fmt);
void dmDrawTTFTextVA(SDL_Surface *screen, TTF_Font *font, SDL_Color col, const int xc, const int yc, const char *fmt, va_list ap);
void dmDrawTTFText(SDL_Surface *screen, TTF_Font *font, SDL_Color col, const int xc, const int yc, const char *fmt, ...);
#endif


#ifdef __cplusplus
}
#endif

#endif // DMFONT_H