-#include <SDL/SDL.h>
+/* SFont: a simple font library that uses special images as fonts
+ Copyright (C) 2003 Karl Bartel
+
+ 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 <assert.h>
#include <stdlib.h>
#include "SFont.h"
-#include "string.h"
-SFont_FontInfo InternalFont;
-int alpha=127;
-int font_height;
-
-Uint32
+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>");
+ assert(X>=0);
+ assert(X<Surface->w);
Bpp = Surface->format->BytesPerPixel;
-
bits = ((Uint8 *)Surface->pixels)+Y*Surface->pitch+X*Bpp;
- // Paint the walls with the fresh blood of your enemies
-
// Get the pixel
switch(Bpp) {
case 1:
break;
}
- return -1;
+ return -1;
}
-void
-InitFont2(SFont_FontInfo *Font)
+SFont_Font *
+SFont_InitFont(SDL_Surface* Surface)
{
int x = 0, i = 0;
+ Uint32 pixel;
+ SFont_Font* Font;
+ Uint32 pink;
- if ( Font->Surface==NULL ) {
- printf("The font has not been loaded!\n");
- exit(1);
- }
+ if (Surface == NULL)
+ return NULL;
+
+ Font = (SFont_Font *) malloc(sizeof(SFont_Font));
+ Font->Surface = Surface;
- while ( x < Font->Surface->w ) {
- if(GetPixel(Font->Surface,x,0)==SDL_MapRGB(Font->Surface->format,255,0,255)) {
+ SDL_LockSurface(Surface);
+
+ pink = SDL_MapRGB(Surface->format, 255, 0, 255);
+ while (x < Surface->w) {
+ if (GetPixel(Surface, x, 0) == pink) {
Font->CharPos[i++]=x;
- while (( x < Font->Surface->w-1) && (GetPixel(Font->Surface,x,0)==SDL_MapRGB(Font->Surface->format,255,0,255)))
+ while((x < Surface->w) && (GetPixel(Surface, x, 0)== pink))
x++;
Font->CharPos[i++]=x;
}
x++;
}
+ Font->MaxPos = x-1;
+
+ pixel = GetPixel(Surface, 0, Surface->h-1);
+ SDL_UnlockSurface(Surface);
+ SDL_SetColorKey(Surface, SDL_SRCCOLORKEY, pixel);
- Font->h=Font->Surface->h;
- font_height = Font->h;
- SDL_SetColorKey(Font->Surface, SDL_SRCCOLORKEY, GetPixel(Font->Surface, 0, Font->Surface->h-1));
+ return Font;
}
void
-InitFont(SDL_Surface *Font)
+SFont_FreeFont(SFont_Font* FontInfo)
{
- InternalFont.Surface=Font;
- InitFont2(&InternalFont);
-}
-
-int
-SFont_wide(char *text) {
- int i=0,xwide=0;
- int ofs;
- SFont_FontInfo *Font = &InternalFont;
-
- while (text[i]) {
- if (text[i]==' ') {
- xwide += (int)(Font->CharPos[2]-Font->CharPos[1]);
- } else {
- ofs = (text[i]-33)*2+1;
- xwide += (int)(Font->CharPos[ofs+1]-Font->CharPos[ofs]);
- }
- i++;
- }
- return xwide;
-}
-
-int
-SFont_height() {
- return InternalFont.Surface->h-1;
+ SDL_FreeSurface(FontInfo->Surface);
+ free(FontInfo);
}
void
-PutString2(SDL_Surface *Surface, SFont_FontInfo *Font, int x, int y, char *text)
+SFont_Write(SDL_Surface *Surface, const SFont_Font *Font,
+ int x, int y, const char *text)
{
- int ofs;
- int i=0;
- SDL_Rect srcrect,dstrect;
-
- while (text[i]) {
- if (text[i]==' ') {
- x+=Font->CharPos[2]-Font->CharPos[1];
+ const char* c;
+ int charoffset;
+ SDL_Rect srcrect, dstrect;
+
+ if(text == NULL)
+ return;
+
+ // these values won't change in the loop
+ srcrect.y = 1;
+ dstrect.y = y;
+ srcrect.h = dstrect.h = Font->Surface->h - 1;
+
+ for(c = text; *c != '\0' && x <= Surface->w ; c++) {
+ charoffset = ((int) (*c - 33)) * 2 + 1;
+ // skip spaces and nonprintable characters
+ if (*c == ' ' || charoffset < 0 || charoffset > Font->MaxPos) {
+ x += Font->CharPos[2]-Font->CharPos[1];
+ continue;
}
- else {
-// printf("-%c- %c - %u\n",228,text[i],text[i]);
- 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_SetAlpha ( Font->Surface, SDL_SRCALPHA, 127);
- SDL_BlitSurface( Font->Surface, &srcrect, Surface, &dstrect);
-
- x+=Font->CharPos[ofs+1]-Font->CharPos[ofs];
- }
- i++;
- }
-}
-// Return a new surface, with the text on it.
-// This surface is new, fresh, and must eventually be freed.
-// Create the new surface with the same colour system as a parent surface.
-SDL_Surface *
-new_Surface_PutString(SDL_Surface *parent, char *text) {
+ srcrect.w = dstrect.w =
+ (Font->CharPos[charoffset+2] + Font->CharPos[charoffset+1])/2 -
+ (Font->CharPos[charoffset] + Font->CharPos[charoffset-1])/2;
+ srcrect.x = (Font->CharPos[charoffset]+Font->CharPos[charoffset-1])/2;
+ dstrect.x = x - (float)(Font->CharPos[charoffset]
+ - Font->CharPos[charoffset-1])/2;
- Uint32 rmask = parent->format->Rmask;
- Uint32 gmask = parent->format->Gmask;
- Uint32 bmask = parent->format->Bmask;
- Uint32 amask = parent->format->Amask;
- Uint32 bytesperpixel = parent->format->BytesPerPixel;
+ SDL_BlitSurface(Font->Surface, &srcrect, Surface, &dstrect);
- return SDL_CreateRGBSurface(
- SDL_SWSURFACE,
- SFont_wide(text),
- SFont_height(),
- bytesperpixel, rmask, gmask, bmask, amask
- );
-}
-
-void
-PutString(SDL_Surface *Surface, int x, int y, char *text) {
- PutString2(Surface, &InternalFont, x, y, text);
-}
-
-int
-TextWidth2(SFont_FontInfo *Font, char *text)
-{
- int x=0,i=0;
- unsigned char ofs = 0;
- while (text[i]!='\0') {
- if (text[i]==' ') {
- x+=Font->CharPos[2]-Font->CharPos[1];
- } else {
- ofs=(text[i]-33)*2+1;
- x+=Font->CharPos[ofs+1]-Font->CharPos[ofs];
- }
- i++;
+ x += Font->CharPos[charoffset+1] - Font->CharPos[charoffset];
}
- return x+Font->CharPos[ofs+2]-Font->CharPos[ofs+1];
}
int
-TextWidth(char *text)
-{
- return TextWidth2(&InternalFont, text);
-}
-
-void
-TextAlpha(int a) {
- alpha = a;
-}
-
-void
-XCenteredString2(SDL_Surface *Surface, SFont_FontInfo *Font, int y, char *text)
+SFont_TextWidth(const SFont_Font *Font, const char *text)
{
- PutString2(Surface, &InternalFont, Surface->w/2-TextWidth(text)/2, y, text);
-}
+ const char* c;
+ int charoffset=0;
+ int width = 0;
-void
-XCenteredString(SDL_Surface *Surface, int y, char *text)
-{
- XCenteredString2(Surface, &InternalFont, y, text);
-}
-
-SDL_Surface *Back;
-char tmp[1024];
+ if(text == NULL)
+ return 0;
-void
-clearBuffer() {
- SDL_Event event;
+ for(c = text; *c != '\0'; c++) {
+ charoffset = ((int) *c - 33) * 2 + 1;
+ // skip spaces and nonprintable characters
+ if (*c == ' ' || charoffset < 0 || charoffset > Font->MaxPos) {
+ width += Font->CharPos[2]-Font->CharPos[1];
+ continue;
+ }
+
+ width += Font->CharPos[charoffset+1] - Font->CharPos[charoffset];
+ }
- // Delete the event buffer
- while (SDL_PollEvent(&event))
- ;
- // start input
- SDL_EnableUNICODE(1);
+ return width;
}
int
-SFont_Input2( SDL_Surface *Dest, SFont_FontInfo *Font, int x, int y, int PixelWidth, char *text)
+SFont_TextHeight(const SFont_Font* Font)
{
- SDL_Event event;
- int ch;
- SDL_Rect rect;
- int ofs=(text[0]-33)*2+1;
- int leftshift;
-
- if (ofs<0) {
- leftshift = 0;
- }
- else {
- leftshift = (Font->CharPos[ofs]-Font->CharPos[ofs-1])/2;
- }
-
- rect.x=x-leftshift;
- rect.y=y;
- rect.w=PixelWidth;
- rect.h=Font->Surface->h;
-
- //SDL_SetAlpha (Dest, SDL_SRCALPHA, 127);
-
- SDL_BlitSurface(Dest, &rect, Back, NULL);
- sprintf(tmp,"%s_",text);
- PutString2(Dest,Font,x,y,tmp);
- SDL_UpdateRect(Dest, x-leftshift, y, PixelWidth, Font->h);
-
- while (SDL_PollEvent(&event) && event.type==SDL_KEYDOWN) {
-
- // Find the character pressed
- ch=event.key.keysym.unicode;
-
- // If backspace and the length of the text > 0, reduce the string by 1 character
- if (ch=='\b') {
- if (strlen(text)>0) {
- text[strlen(text)-1]='\0';
- }
- }
- else {
- sprintf(text,"%s%c",text,ch);
- }
-
- // If the new character would exceed the allowed width
- if (TextWidth2(Font,text)>PixelWidth) {
- text[strlen(text)-1]='\0';
- }
-
- //SDL_SetAlpha (Back, SDL_SRCALPHA, 127);
- SDL_BlitSurface( Back, NULL, Dest, &rect);
- PutString2(Dest, Font, x, y, text);
- if (ofs>0) {
- SDL_UpdateRect(Dest, x-(Font->CharPos[ofs]-Font->CharPos[ofs-1])/2, y, PixelWidth, Font->Surface->h);
- }
-
- }
- //text[strlen(text)-1]='\0';
- if (ch==SDLK_RETURN) {
- SDL_FreeSurface(Back);
- return 1;
- }
- else
- return 0;
+ return Font->Surface->h - 1;
}
-int
-SFont_Input( SDL_Surface *Dest, int x, int y, int PixelWidth, char *text)
+void
+SFont_WriteCenter(SDL_Surface *Surface, const SFont_Font *Font,
+ int y, const char *text)
{
-
- Back = SDL_AllocSurface(Dest->flags,
- PixelWidth,
- InternalFont.h,
- Dest->format->BitsPerPixel,
- Dest->format->Rmask,
- Dest->format->Gmask,
- Dest->format->Bmask, 0);
-
- return SFont_Input2( Dest, &InternalFont, x, y, PixelWidth, text);
- // ph:
- // Returns 1 when the return key is pressed
- // Returns 0 when nothing exceptional happened
+ SFont_Write(Surface, Font, Surface->w/2 - SFont_TextWidth(Font, text)/2,
+ y, text);
}
Got questions, comments, patches, etc.? Contact Jason Woofenden