vbagx/source/vba/Text.cpp

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 Ben Parnell
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/* Code originally from fceu/drawing.h file, adapted by Forgotten
 */
#include "System.h"

extern int RGB_LOW_BITS_MASK;

static const u8 fontdata2[2048] =
  {
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    0x3e,0x63,0x7b,0x7b,0x7b,0x03,0x1e,0x00,0x0c,0x1e,0x33,0x33,0x3f,0x33,0x33,0x00,0x3f,0x66,0x66,0x3e,0x66,0x66,0x3f,0x00,0x3c,0x66,0x03,0x03,0x03,0x66,0x3c,0x00,0x1f,0x36,0x66,0x66,0x66,0x36,0x1f,0x00,0x7f,0x46,0x16,0x1e,0x16,0x46,0x7f,0x00,0x7f,0x46,0x16,0x1e,0x16,0x06,0x0f,0x00,0x3c,0x66,0x03,0x03,0x73,0x66,0x7c,0x00,0x33,0x33,0x33,0x3f,0x33,0x33,0x33,0x00,0x1e,0x0c,0x0c,0x0c,0x0c,0x0c,0x1e,0x00,0x78,0x30,0x30,0x30,0x33,0x33,0x1e,0x00,0x67,0x66,0x36,0x1e,0x36,0x66,0x67,0x00,0x0f,0x06,0x06,0x06,0x46,0x66,0x7f,0x00,0x63,0x77,0x7f,0x7f,0x6b,0x63,0x63,0x00,0x63,0x67,0x6f,0x7b,0x73,0x63,0x63,0x00,0x1c,0x36,0x63,0x63,0x63,0x36,0x1c,0x00,0x3f,0x66,0x66,0x3e,0x06,0x06,0x0f,0x00,0x1e,0x33,0x33,0x33,0x3b,0x1e,0x38,0x00,0x3f,0x66,0x66,0x3e,0x36,0x66,0x67,0x00,0x1e,0x33,0x07,0x0e,0x38,0x33,0x1e,0x00,0x3f,0x2d,0x0c,0x0c,0x0c,0x0c,0x1e,0x00,0x33,0x33,0x33,0x33,0x33,0x33,0x3f,0x00,0x33,0x33,0x33,0x33,0x33,0x1e,0x0c,0x00,0x63,0x63,0x63,0x6b,0x7f,0x77,0x63,0x00,0x63,0x63,0x36,0x1c,0x1c,0x36,0x63,0x00,0x33,0x33,0x33,0x1e,0x0c,0x0c,0x1e,0x00,0x7f,0x63,0x31,0x18,0x4c,0x66,0x7f,0x00,0x1e,0x06,0x06,0x06,0x06,0x06,0x1e,0x00,0x03,0x06,0x0c,0x18,0x30,0x60,0x40,0x00,0x1e,0x18,0x18,0x18,0x18,0x18,0x1e,0x00,0x08,0x1c,0x36,0x63,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,
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  };

static void drawTextInternal(u8 *screen, int pitch, int x, int y,
                             const char *string, bool trans)
{
  screen += y*pitch;
  int inc = 2;
  switch(systemColorDepth)
    {
    case 24:
      inc = 3;
      break;
    case 32:
      inc = 4;
      break;
    }
  screen += x*inc;

  switch(systemColorDepth)
    {
    case 16:
    {
      while(*string)
        {
          char c = *string++;
          u8 *scr = screen;

          u16 mask = ~RGB_LOW_BITS_MASK;
          int h, w;
          u16 *s = (u16 *)scr;
          for (h = 0; h < 8; h++)
            {
              for (w = 0; w < 8; w++, s++)
                {
                  int on = (fontdata2[(c<<3)+h]>>w)&1;

                  if(trans)
                    {
                      if(on)
                        *s = ((0xf) << systemRedShift) +
                             ((*s & mask) >>1);
                    }
                  else
                    {
                      if(on)
                        *s = (0x1f) << systemRedShift;
                    }
                }
              scr += pitch;
              s = (u16 *)scr;
            }
          screen += inc*8;
        }
    }
    break;
    case 24:
    {
      while(*string)
        {
          char c = *string++;
          u8 *scr = screen;

          int h, w;
          u8 *s = (u8 *)scr;
          for (h = 0; h < 8; h++)
            {
              for (w = 0; w < 8; w++, s+=3)
                {
                  int on = (fontdata2[(c<<3)+h]>>w)&1;

                  if(trans)
                    {
                      if(on)
                        {
                          u32 color = (0x1f) << systemRedShift;
                          *s = ((color & 255)>>1)+(*s>>1);
                          *(s+1) = (((color >> 8) & 255)>>1)+(*(s+1)>>1);
                          *(s+2) = (((color >> 16) & 255)>>1)+(*(s+2)>>1);
                        }
                    }
                  else
                    {
                      if(on)
                        {
                          u32 color = (0x1f) << systemRedShift;
                          *s = (color & 255);
                          *(s+1) = (color >> 8) & 255;
                          *(s+2) = (color >> 16) & 255;
                        }
                    }
                }
              scr += pitch;
              s = (u8 *)scr;
            }
          screen += inc*8;
        }
    }
    break;
    case 32:
    {
      while(*string)
        {
          char c = *string++;
          u8 *scr = screen;

          int h, w;
          u32 mask = 0xfefefe;
          u32 *s = (u32 *)scr;
          for (h = 0; h < 8; h++)
            {
              for (w = 0; w < 8; w++, s++)
                {
                  int on = (fontdata2[(c<<3)+h]>>w)&1;

                  if(trans)
                    {
                      if(on)
                        *s = ((0xf) << systemRedShift) + ((*s & mask)>>1);
                    }
                  else
                    {
                      if(on)
                        *s = (0x1f) << systemRedShift;
                    }
                }
              scr += pitch;
              s = (u32 *)scr;
            }
          screen += inc*8;
        }
    }
    break;
    }
}

void drawText(u8 *screen, int pitch, int x, int y, const char *string)
{
  drawTextInternal(screen, pitch, x, y, string, false);
}

void drawTextTransp(u8 *screen, int pitch, int x, int y, const char *string)
{
  drawTextInternal(screen, pitch, x, y, string, true);
}