/* SFont: a simple font-library that uses special .pngs as fonts
Copyright (C) 2003 Karl Bartel
License: GPL or LGPL (at your choice)
WWW: http://www.linux-games.com/sfont/
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
Karl Bartel
Cecilienstr. 14
12307 Berlin
GERMANY
karlb@gmx.net
*/
#include "SDL.h"
#include "font.h"
#include <string.h>
#include <stdlib.h> // needed for exit()
SFont_FontInfo InternalFont;
static Uint32 GetPixel(SDL_Surface *Surface, Sint32 X, Sint32 Y)
{
Uint8 *bits;
Uint32 Bpp;
if (X<0) puts("SFONT ERROR: x too small in GetPixel. Report this to <karlb@gmx.net>");
if (X>=Surface->w) puts("SFONT ERROR: x too big in GetPixel. Report this to <karlb@gmx.net>");
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;
}
void InitFont2(SFont_FontInfo *Font)
{
int x = 0, i = 0;
if ( Font->Surface==NULL ) {
printf("The font has not been loaded!\n");
exit(1);
}
if (SDL_MUSTLOCK(Font->Surface)) SDL_LockSurface(Font->Surface);
while ( x < Font->Surface->w ) {
if(GetPixel(Font->Surface,x,0)==SDL_MapRGB(Font->Surface->format,255,0,255)) {
Font->CharPos[i++]=x;
while (( x < Font->Surface->w-1) && (GetPixel(Font->Surface,x,0)==SDL_MapRGB(Font->Surface->format,255,0,255)))
x++;
Font->CharPos[i++]=x;
}
x++;
}
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));
}
void InitFont(SDL_Surface *Font)
{
InternalFont.Surface=Font;
InitFont2(&InternalFont);
}
void PutString2(SDL_Surface *Surface, SFont_FontInfo *Font, int x, int y, char *text)
{
int ofs;
int i=0;
SDL_Rect srcrect,dstrect;
while (text[i]!='\0') {
if (text[i]==' ') {
x+=Font->CharPos[2]-Font->CharPos[1];
i++;
}
else {
// printf("-%c- %c - %u\n",228,text[i],text[i]);
ofs=((unsigned char)text[i]-33)*2+1;
// ofs=(text[i]-33)*2+1;
// printf("printing %c %d\n",text[i],ofs);
srcrect.w = dstrect.w = (Font->CharPos[ofs+2]+Font->CharPos[ofs+1])/2-(Font->CharPos[ofs]+Font->CharPos[ofs-1])/2;
srcrect.h = dstrect.h = Font->Surface->h-1;
srcrect.x = (Font->CharPos[ofs]+Font->CharPos[ofs-1])/2;
srcrect.y = 1;
dstrect.x = x-(float)(Font->CharPos[ofs]-Font->CharPos[ofs-1])/2;
dstrect.y = y;
SDL_BlitSurface( Font->Surface, &srcrect, Surface, &dstrect);
x+=Font->CharPos[ofs+1]-Font->CharPos[ofs];
i++;
}
}
}
void PutString(SDL_Surface *Surface, int x, int y, char *text)
{
PutString2(Surface, &InternalFont, x, y, text);
}
int SFont_TextWidth2(SFont_FontInfo *Font, char *text)
{
int ofs=0;
int i=0,x=0;
while (text[i]!='\0') {
if (text[i]==' ') {
x+=Font->CharPos[2]-Font->CharPos[1];
i++;
}
else {
// ofs=(text[i]-33)*2+1;
ofs=((unsigned char)text[i]-33)*2+1;
x+=Font->CharPos[ofs+1]-Font->CharPos[ofs];
i++;
}
}
// printf ("--%d\n",x);
return x;
}
int SFont_TextWidth(char *text)
{
return SFont_TextWidth2(&InternalFont, text);
}
void XCenteredString2(SDL_Surface *Surface, SFont_FontInfo *Font, int y, char *text)
{
PutString2(Surface, Font, Surface->w/2-SFont_TextWidth2(Font,text)/2, y, text);
}
void XCenteredString(SDL_Surface *Surface, int y, char *text)
{
XCenteredString2(Surface, &InternalFont, y, text);
}
void SFont_InternalInput( SDL_Surface *Dest, SFont_FontInfo *Font, int x, int y, int PixelWidth, char *text)
{
SDL_Event event;
int ch=-1,blink=0;
long blinktimer=0;
SDL_Surface *Back;
SDL_Rect rect;
SDLKey sym;
int previous;
// int ofs=(text[0]-33)*2+1;
// int leftshift=(Font->CharPos[ofs]-Font->CharPos[ofs-1])/2;
Back = SDL_AllocSurface(Dest->flags,
Dest->w,
Font->h,
Dest->format->BitsPerPixel,
Dest->format->Rmask,
Dest->format->Gmask,
Dest->format->Bmask, 0);
rect.x=0;
rect.y=y;
rect.w=Dest->w;
rect.h=Font->Surface->h;
SDL_BlitSurface(Dest, &rect, Back, NULL);
PutString2(Dest,Font,x,y,text);
SDL_UpdateRects(Dest, 1, &rect);
// start input
previous=SDL_EnableUNICODE(1);
blinktimer=SDL_GetTicks();
while (ch!=SDLK_RETURN) {
printf("%d\n", ch);
printf("%s\n", text);
if (event.type == SDL_KEYDOWN) {
ch = event.key.keysym.unicode;
sym = event.key.keysym.sym;
if (((ch>31)||(sym==SDLK_BACKSPACE)) && (ch<128)) {
if ((sym==SDLK_BACKSPACE)&&(strlen(text)>0))
text[strlen(text)-1]='\0';
else if (sym!=SDLK_BACKSPACE)
sprintf(text,"%s%c",text,ch);
if (SFont_TextWidth2(Font,text)>PixelWidth) text[strlen(text)-1]='\0';
SDL_BlitSurface( Back, NULL, Dest, &rect);
PutString2(Dest, Font, x, y, text);
SDL_UpdateRects(Dest, 1, &rect);
// printf("%s ## %d\n",text,strlen(text));
SDL_WaitEvent(&event);
}
}
if (SDL_GetTicks()>blinktimer) {
blink=1-blink;
blinktimer=SDL_GetTicks()+500;
if (blink) {
PutString2(Dest, Font, x+SFont_TextWidth2(Font,text), y, "|");
SDL_UpdateRects(Dest, 1, &rect);
// SDL_UpdateRect(Dest, x+SFont_TextWidth2(Font,text), y, SFont_TextWidth2(Font,"|"), Font->Surface->h);
} else {
SDL_BlitSurface( Back, NULL, Dest, &rect);
PutString2(Dest, Font, x, y, text);
SDL_UpdateRects(Dest, 1, &rect);
// SDL_UpdateRect(Dest, x-(Font->CharPos[ofs]-Font->CharPos[ofs-1])/2, y, PixelWidth, Font->Surface->h);
}
}
SDL_Delay(1);
SDL_PollEvent(&event);
}
text[strlen(text)]='\0';
SDL_FreeSurface(Back);
SDL_EnableUNICODE(previous); //restore the previous state
}
void SFont_Input2( SDL_Surface *Dest, SFont_FontInfo *Font, int x, int y, int PixelWidth, char *text)
{
SFont_InternalInput( Dest, Font, x, y, PixelWidth, text);
}
void SFont_Input( SDL_Surface *Dest, int x, int y, int PixelWidth, char *text)
{
SFont_Input2( Dest, &InternalFont, x, y, PixelWidth, text);
}