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/* file created on Wed Aug 28 15:38:28 CEST 2002 by doom */
#include "scrollingtext.h"
#include <string.h>
#include <stdlib.h>
struct _SCROLLING_TEXT
{
char *text;
SoFont *font;
int pos;
int text_width;
};
static int scrolling_text_width (ScrollingText * st);
ScrollingText *
scrolling_text_new (const char *text, SoFont * font)
{
ScrollingText *st = (ScrollingText*)malloc (sizeof (ScrollingText));
st->text = NULL;
scrolling_text_set_font (st, font);
scrolling_text_set_text (st, text);
st->text_width = scrolling_text_width (st);
st->pos = 640;
return st;
}
void
scrolling_text_set_font (ScrollingText * st, SoFont * font)
{
st->font = font;
st->text_width = scrolling_text_width (st);
}
void
scrolling_text_set_text (ScrollingText * st, const char *text)
{
if (st->text)
free (st->text);
if (text) {
st->text = (char*)malloc (strlen (text) + 1);
strcpy (st->text, text);
}
else
st->text = NULL;
st->text_width = scrolling_text_width (st);
}
void
scrolling_text_update (ScrollingText * st, SDL_Surface * surf)
{
if ((st->text == NULL) || (st->font == NULL))
return;
st->pos -= 3;
if (st->pos < -st->text_width)
st->pos = surf->w;
}
void
scrolling_text_draw (ScrollingText * st, SDL_Surface * surf, int y)
{
if ((st->text == NULL) || (st->font == NULL))
return;
SoFont_PutString (st->font, surf, st->pos, y, st->text, NULL);
}
static int
scrolling_text_width (ScrollingText * st)
{
if ((st->text == NULL) || (st->font == NULL))
return 0;
return SoFont_TextWidth (st->font, st->text) + 400;
}
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