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return 0;
}
break;
}
}
return -1;
}
static Uint16 decide_picture_size(int nwantsize,const Uint8*wantsize,const Uint16*havesize,int n) {
int i,j;
if(!nwantsize) fatal("Unable to determine what picture size is wanted\n");
for(i=0;i<nwantsize;i++) if(havesize[j=wantsize[i]]==n) return j;
for(i=*wantsize;i;--i) if(havesize[i]) return i;
fatal("Unable to determine what picture size is wanted\n");
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383
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return 0;
}
break;
}
}
return -1;
}
void draw_lines(int x,int y) {
Uint8*pix;
int pitch;
SDL_Event ev;
int xx=(x-1)*picture_size+left_margin+picture_size/2;
int yy=(y-1)*picture_size+picture_size/2;
set_cursor(XC_cross_reverse);
if(xx>0 && yy>0 && xx<screen->w && yy<screen->h) {
SDL_LockSurface(screen);
pix=screen->pixels;
pitch=screen->pitch;
// Diagonal
for(y=0;y<screen->h;y++) {
x=xx-yy+y;
if(x>1 && x<screen->w-2) memcpy(pix+y*pitch+x-2,"\xF0\xF8\xF7\xF8\xF0",5);
x=xx+yy-y;
if(x>1 && x<screen->w-2) memcpy(pix+y*pitch+x-2,"\xF0\xF8\xF7\xF8\xF0",5);
}
// Vertical
if(xx+2<screen->w) for(y=0;y<screen->h;y++) pix[y*pitch+xx+2]=0xF0;
if(xx+1<screen->w) for(y=0;y<screen->h;y++) pix[y*pitch+xx+1]=0xF8;
for(y=0;y<screen->h;y++) pix[y*pitch+xx]=0xF7;
if(xx-1>0) for(y=0;y<screen->h;y++) pix[y*pitch+xx-1]=0xF8;
if(xx-2>0) for(y=0;y<screen->h;y++) pix[y*pitch+xx-2]=0xF0;
// Horizontal
if(yy+2<screen->h) memset(pix+(yy+2)*pitch,0xF0,screen->w);
if(yy+1<screen->h) memset(pix+(yy+1)*pitch,0xF8,screen->w);
memset(pix+yy*pitch,0xF7,screen->w);
if(yy-1>0) memset(pix+(yy-1)*pitch,0xF8,screen->w);
if(yy-2>0) memset(pix+(yy-2)*pitch,0xF0,screen->w);
SDL_UnlockSurface(screen);
}
SDL_Flip(screen);
while(SDL_WaitEvent(&ev)) switch(ev.type) {
case SDL_KEYDOWN: case SDL_MOUSEBUTTONDOWN:
case SDL_KEYUP: case SDL_MOUSEBUTTONUP:
return;
case SDL_QUIT:
SDL_PushEvent(&ev);
return;
}
}
static Uint16 decide_picture_size(int nwantsize,const Uint8*wantsize,const Uint16*havesize,int n) {
int i,j;
if(!nwantsize) fatal("Unable to determine what picture size is wanted\n");
for(i=0;i<nwantsize;i++) if(havesize[j=wantsize[i]]==n) return j;
for(i=*wantsize;i;--i) if(havesize[i]) return i;
fatal("Unable to determine what picture size is wanted\n");
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