BFont.c

/***********************************************************/
/*                                                         */
/*   BFONT.c v. 1.0.3 - Billi Font Library by Diego Billi  */
/*                                                         */
/***********************************************************/

#include "BFont.h"
#include "system.h"
#include "proto.h"

/* Current font */
BFont_Info *CurrentFont;


void InitFont (BFont_Info * Font);

/* utility functions */
Uint32 GetPixel (SDL_Surface * Surface, Sint32 X, Sint32 Y);
void PutPixel (SDL_Surface * surface, int x, int y, Uint32 pixel);
int count (const char *text);


void
InitFont (BFont_Info * Font)
{
  int x = 0, i = 0;
  Uint32 sentry;

  i = '!';

  sentry = GetPixel (Font->Surface, 0, 0);
  /* sentry = SDL_MapRGB(Font->Surface->format, 255, 0, 255); */

  if (Font->Surface == NULL)
    {
      fprintf (stderr, "BFont: The font has not been loaded!\n");
      exit (1);
    }
  if (SDL_MUSTLOCK (Font->Surface))
    SDL_LockSurface (Font->Surface);
  x = 0;
  while (x < (Font->Surface->w - 1))
    {
      if (GetPixel (Font->Surface, x, 0) != sentry)
	{
	  Font->Chars[i].x = x;
	  Font->Chars[i].y = 1;
	  Font->Chars[i].h = Font->Surface->h;
	  for (;
	       GetPixel (Font->Surface, x, 0) != sentry
	       && x < (Font->Surface->w); ++x);
	  Font->Chars[i].w = (x - Font->Chars[i].x);
	  i++;
	}
      else
	{
	  x++;
	}
    }
  Font->Chars[' '].x = 0;
  Font->Chars[' '].y = 0;
  Font->Chars[' '].h = Font->Surface->h;
  Font->Chars[' '].w = Font->Chars['!'].w;

  if (SDL_MUSTLOCK (Font->Surface))
    SDL_UnlockSurface (Font->Surface);

  Font->h = Font->Surface->h;

  SDL_SetColorKey (Font->Surface, SDL_SRCCOLORKEY,
		   GetPixel (Font->Surface, 0, Font->Surface->h - 1));
}


/* Load the font and stores it in the BFont_Info structure */
BFont_Info *
LoadFont (char *filename, float scale)
{
  SDL_Surface *surface = NULL;
  int x;
  BFont_Info *Font = NULL;

  if (filename != NULL)
    {
      Font = (BFont_Info *) MyMalloc (sizeof (BFont_Info));
      if (Font != NULL)
	{
	  surface = (SDL_Surface *) IMG_Load (filename);
	  ScalePic (&surface, scale);

	  if (surface != NULL)
	    {
	      Font->Surface = surface;
	      for (x = 0; x < 256; x++)
		{
		  Font->Chars[x].x = 0;
		  Font->Chars[x].y = 0;
		  Font->Chars[x].h = 0;
		  Font->Chars[x].w = 0;
		}
	      /* Init the font */
	      InitFont (Font);
	      /* Set the font as the current font */
	      SetCurrentFont (Font);
	    }
	  else
	    {
	      /* free memory allocated for the BFont_Info structure */
	      free (Font);
	      Font = NULL;
	    }
	}
    }

  return Font;
}


void
FreeFont (BFont_Info * Font)
{
  SDL_FreeSurface (Font->Surface);
  free (Font);
}

BFont_Info *
SetFontColor (BFont_Info * Font, Uint8 r, Uint8 g, Uint8 b)
{
  int x, y;

  BFont_Info *newfont;
  SDL_Surface *surface = NULL;

  Uint32 pixel;
  Uint8 old_r, old_g, old_b;
  Uint8 new_r, new_g, new_b;
  Uint32 color_key;

  newfont = (BFont_Info *) malloc (sizeof (BFont_Info));
  if (newfont != NULL)
    {

      newfont->h = Font->h;

      for (x = 0; x < 256; x++)
	{
	  newfont->Chars[x].x = Font->Chars[x].x;
	  newfont->Chars[x].y = Font->Chars[x].y;
	  newfont->Chars[x].h = Font->Chars[x].h;
	  newfont->Chars[x].w = Font->Chars[x].w;
	}

      surface =
	SDL_ConvertSurface (Font->Surface, Font->Surface->format,
			    Font->Surface->flags);
      if (surface != NULL)
	{

	  if (SDL_MUSTLOCK (surface))
	    SDL_LockSurface (surface);
	  if (SDL_MUSTLOCK (Font->Surface))
	    SDL_LockSurface (Font->Surface);

	  color_key = GetPixel (surface, 0, surface->h - 1);

	  //	  printf ("looking...\n");
	  for (x = 0; x < Font->Surface->w; x++)
	    {
	      for (y = 0; y < Font->Surface->h; y++)
		{
		  old_r = old_g = old_b = 0;
		  pixel = GetPixel (Font->Surface, x, y);

		  if (pixel != color_key)
		    {
		      SDL_GetRGB (pixel, surface->format, &old_r, &old_g,
				  &old_b);

		      new_r = (Uint8) ((old_r * r) / 255);
		      new_g = (Uint8) ((old_g * g) / 255);
		      new_b = (Uint8) ((old_b * b) / 255);

		      pixel =
			SDL_MapRGB (surface->format, new_r, new_g, new_b);
		      PutPixel (surface, x, y, pixel);
		    }
		}
	    }
	  //	  printf ("unlooking...\n");
	  if (SDL_MUSTLOCK (surface))
	    SDL_UnlockSurface (surface);
	  if (SDL_MUSTLOCK (Font->Surface))
	    SDL_UnlockSurface (Font->Surface);

	  SDL_SetColorKey (surface, SDL_SRCCOLORKEY, color_key);
	}

      newfont->Surface = surface;
    }
  return newfont;
}

/* Set the current font */
void
SetCurrentFont (BFont_Info * Font)
{
  CurrentFont = Font;
}

/* Returns the pointer to the current font strucure in use */
BFont_Info *
GetCurrentFont (void)
{
  return CurrentFont;
}

/* Return the font height */
int
FontHeight (BFont_Info * Font)
{
  return (Font->h);
}

void
SetFontHeight (BFont_Info * Font, int height)
{
  Font->h = height;
}


/* Return the width of the "c" character */
int
CharWidth (BFont_Info * Font, int c)
{
  return Font->Chars[c].w;
}

/* Puts a single char on the surface */
int
PutChar (SDL_Surface * Surface, int x, int y, int c)
{
  return PutCharFont (Surface, CurrentFont, x, y, c);
}

/* Puts a single char on the surface with the specified font */
int
PutCharFont (SDL_Surface * Surface, BFont_Info * Font, int x, int y, int c)
{
  int r = 0;
  SDL_Rect dest;

  dest.w = CharWidth (Font, ' ');
  dest.h = FontHeight (Font);
  dest.x = x;
  dest.y = y;
  if (c != ' ')
    {
      SDL_BlitSurface (Font->Surface, &Font->Chars[c], Surface, &dest);
    }
  r = dest.w;
  return r;
}

void
PutString (SDL_Surface * Surface, int x, int y, const char *text)
{
  PutStringFont (Surface, CurrentFont, x, y, text);
}

void
PutStringFont (SDL_Surface * Surface, BFont_Info * Font, int x, int y, const char *text)
{
  int i = 0;
  while (text[i] != '\0')
    {
      x += PutCharFont (Surface, Font, x, y, text[i]);
      i++;
    }
}


int
TextWidth (const char *text)
{
  return TextWidthFont (CurrentFont, text);
}

int
TextWidthFont (BFont_Info * Font, const char *text)
{
  int i = 0, x = 0;

  while (text[i] != '\0')
    {
      x += CharWidth (Font, text[i]);
      i++;
    }
  return x;
}


/* counts the spaces of the strings */
int
count (const char *text)
{
  char *p = NULL;
  int pos = -1;
  int i = 0;
  /* Calculate the space occupied by the text without spaces */
  while ((p = strchr (&text[pos + 1], ' ')) != NULL)
    {
      i++;
      pos = p - text;
    }
  return i;
}

void
JustifiedPutString (SDL_Surface * Surface, int y, const char *text)
{
  JustifiedPutStringFont (Surface, CurrentFont, y, text);
}

void
JustifiedPutStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
			const char *text)
{
  int spaces = 0;
  int gap;
  int single_gap;
  int dif;

  char *strtmp;
  char *p;
  int pos = -1;
  int xpos = 0;


  if (strchr (text, ' ') == NULL)
    {
      PutStringFont (Surface, Font, 0, y, text);
    }
  else
    {
      gap = (Surface->w - 1) - TextWidthFont (Font, text);

      if (gap <= 0)
	{
	  PutStringFont (Surface, Font, 0, y, text);
	}
      else
	{
	  spaces = count (text);
	  dif = gap % spaces;
	  single_gap = (gap - dif) / spaces;
	  xpos = 0;
	  pos = -1;
	  while (spaces > 0)
	    {
	      p = strstr (&text[pos + 1], " ");
	      strtmp = NULL;
	      strtmp =
		(char *) calloc ((p - &text[pos + 1]) + 1, sizeof (char));
	      if (strtmp != NULL)
		{
		  strncpy (strtmp, &text[pos + 1], (p - &text[pos + 1]));
		  PutStringFont (Surface, Font, xpos, y, strtmp);
		  xpos =
		    xpos + TextWidthFont (Font,
					  strtmp) + single_gap +
		    CharWidth (Font, ' ');
		  if (dif >= 0)
		    {
		      xpos++;
		      dif--;
		    }
		  pos = p - text;
		  spaces--;
		  free (strtmp);
		}
	    }
	  strtmp = NULL;
          size_t len = strlen (&text[pos + 1]) + 1;
	  strtmp =
	    (char *) calloc (len, sizeof (char));

	  if (strtmp != NULL)
	    {
	      memcpy (strtmp, &text[pos + 1], len);
	      PutStringFont (Surface, Font, xpos, y, strtmp);
	      free (strtmp);
	    }
	}
    }
}

void
CenteredPutString (SDL_Surface * Surface, int y, const char *text)
{
  CenteredPutStringFont (Surface, CurrentFont, y, text);
}

void
CenteredPutStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
		       const char *text)
{
  PutStringFont (Surface, Font,
		 Surface->w / 2 - TextWidthFont (Font, text) / 2, y, text);
}

void
RightPutString (SDL_Surface * Surface, int y, const char *text)
{
  RightPutStringFont (Surface, CurrentFont, y, text);
}

void
RightPutStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
		    const char *text)
{
  PutStringFont (Surface, Font, Surface->w - TextWidthFont (Font, text) - 1,
		 y, text);
}

void
LeftPutString (SDL_Surface * Surface, int y, const char *text)
{
  LeftPutStringFont (Surface, CurrentFont, y, text);
}

void
LeftPutStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
		   const char *text)
{
  PutStringFont (Surface, Font, 0, y, text);
}

/******/

void
PrintString (SDL_Surface * Surface, int x, int y, const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);

      PutStringFont (Surface, CurrentFont, x, y, temp);

      free (temp);
    }
  va_end (args);
}

void
PrintStringFont (SDL_Surface * Surface, BFont_Info * Font, int x, int y,
		 const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      PutStringFont (Surface, Font, x, y, temp);
      free (temp);
    }
  va_end (args);
}

void
CenteredPrintString (SDL_Surface * Surface, int y, const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      CenteredPutString (Surface, y, temp);
      free (temp);
    }
  va_end (args);
}

void
CenteredPrintStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
			 const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      CenteredPutStringFont (Surface, Font, y, temp);
      free (temp);
    }
  va_end (args);

}

void
RightPrintString (SDL_Surface * Surface, int y, const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      RightPutString (Surface, y, temp);
      free (temp);
    }
  va_end (args);
}

void
RightPrintStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
		      const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      RightPutStringFont (Surface, Font, y, temp);
      free (temp);
    }
  va_end (args);
}

void
LeftPrintString (SDL_Surface * Surface, int y, const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      LeftPutString (Surface, y, temp);
      free (temp);
    }
  va_end (args);
}

void
LeftPrintStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
		     const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      LeftPutStringFont (Surface, Font, y, temp);
      free (temp);
    }
  va_end (args);
}

void
JustifiedPrintString (SDL_Surface * Surface, int y, const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      JustifiedPutString (Surface, y, temp);
      free (temp);
    }
  va_end (args);
}

void
JustifiedPrintStringFont (SDL_Surface * Surface, BFont_Info * Font, int y,
			  const char *fmt, ...)
{
  va_list args;
  char *temp;
  va_start (args, fmt);

  if ((temp = (char *) MyMalloc (1000 + 1)) != NULL)
    {
      vsprintf (temp, fmt, args);
      JustifiedPutStringFont (Surface, Font, y, temp);
      free (temp);
    }
  va_end (args);
}


/*********************************************************************************************************/
/*********************************************************************************************************/
/*********************************************************************************************************/

void
PutPixel (SDL_Surface * surface, int x, int y, Uint32 pixel)
{
  int bpp = surface->format->BytesPerPixel;
  /* Here p is the address to the pixel we want to set */
  Uint8 *p = (Uint8 *) surface->pixels + y * surface->pitch + x * bpp;

  switch (bpp)
    {
    case 1:
      *p = pixel;
      break;

    case 2:
      *(Uint16 *) p = pixel;
      break;

    case 3:
      if (SDL_BYTEORDER == SDL_BIG_ENDIAN)
	{
	  p[0] = (pixel >> 16) & 0xff;
	  p[1] = (pixel >> 8) & 0xff;
	  p[2] = pixel & 0xff;
	}
      else
	{
	  p[0] = pixel & 0xff;
	  p[1] = (pixel >> 8) & 0xff;
	  p[2] = (pixel >> 16) & 0xff;
	}
      break;

    case 4:
      *(Uint32 *) p = pixel;
      break;
    }
}

Uint32
GetPixel (SDL_Surface * Surface, Sint32 X, Sint32 Y)
{

  Uint8 *bits;
  Uint32 Bpp;

  if (X < 0)
    DebugPrintf (2, "x too small in GetPixel!");
  if (X >= Surface->w)
    DebugPrintf (2, "x too big in GetPixel!");

  Bpp = Surface->format->BytesPerPixel;

  bits = ((Uint8 *) Surface->pixels) + Y * Surface->pitch + X * Bpp;

  // Get the pixel
  switch (Bpp)
    {
    case 1:
      return *((Uint8 *) Surface->pixels + Y * Surface->pitch + X);
      break;
    case 2:
      return *((Uint16 *) Surface->pixels + Y * Surface->pitch / 2 + X);
      break;
    case 3:
      {				// Format/endian independent
	Uint8 r, g, b;
	r = *((bits) + Surface->format->Rshift / 8);
	g = *((bits) + Surface->format->Gshift / 8);
	b = *((bits) + Surface->format->Bshift / 8);
	return SDL_MapRGB (Surface->format, r, g, b);
      }
      break;
    case 4:
      return *((Uint32 *) Surface->pixels + Y * Surface->pitch / 4 + X);
      break;
    }

  return -1;
}