/**
* @brief Displays the introduction sequence.
*
* @brief text Path of text file to use.
* @brief mus Type of music to use (run through music.lua).
* @return 0 on success.
*/
int intro_display( const char *text, const char *mus )
{
double offset; /* distance from bottom of the top line. */
double line_height; /* # pixels per line. */
int lines_per_screen; /* max appearing lines on the screen. */
scroll_buf_t *sb_arr; /* array of lines to render. */
scroll_buf_t *sb_list; /* list " " " " */
double vel = 16.; /* velocity: speed of text. */
int stop = 0; /* stop the intro. */
unsigned int tcur, tlast; /* timers. */
double delta; /* time diff from last render to this one. */
int line_index = 0; /* index into the big list of intro lines. */
intro_img_t side_image; /* image to go along with the text. */
intro_img_t transition; /* image for transitioning. */
/* Load the introduction. */
if (intro_load(text) < 0)
return -1;
/* Change music to intro music. */
if (mus != NULL)
music_choose(mus);
/* We need to clear key repeat to avoid infinite loops. */
toolkit_clearKey();
/* Enable keyrepeat just for the intro. */
SDL_EnableKeyRepeat( conf.repeat_delay, conf.repeat_freq );
/* Do a few calculations to figure out how many lines can be present on the
screen at any given time. */
line_height = (double)intro_font.h * 1.3;
lines_per_screen = (int)(SCREEN_H / line_height + 1.5); /* round up + 1 */
sb_arr = (scroll_buf_t*)malloc( sizeof(scroll_buf_t) * lines_per_screen );
/* Force the first line to be loaded immediately. */
offset = line_height;
/* Create a cycle of lines. */
sb_list = arrange_scroll_buf( sb_arr, lines_per_screen );
/* Unset the side image. */
initialize_image( &side_image );
initialize_image( &transition );
tlast = SDL_GetTicks();
while (!stop) {
tcur = SDL_GetTicks();
delta = (double)(tcur - tlast) / 1000.;
tlast = tcur;
/* Increment position. */
offset += vel * delta;
while (! (offset < line_height)) {
/* One line has scrolled off, and another one on. */
if (line_index < intro_nlines) {
switch (intro_lines[line_index][0]) {
case 't': /* plain ol' text. */
sb_list->text = &intro_lines[line_index][1];
offset -= line_height;
sb_list = sb_list->next;
break;
case 'i': /* fade in image. */
intro_fade_image_in( &side_image, &transition,
&intro_lines[line_index][1] );
break;
case 'o': /* fade out image. */
if (NULL == side_image.tex) {
WARN("Tried to fade out without an image." );
break;
}
side_image.fade_rate = -0.1;
side_image.c.a = 0.99;
break;
default: /* unknown. */
break;
}
++line_index;
} else {
sb_list->text = NULL;
offset -= line_height;
sb_list = sb_list->next;
}
} /* while (offset > line_height) */
/* Fade the side image. */
if (side_image.tex != NULL && side_image.c.a < 1.0) {
side_image.c.a += delta * vel * side_image.fade_rate;
if (transition.tex != NULL && transition.fade_rate > 0.0) {
transition.c.a += delta * vel * transition.fade_rate;
}
if (side_image.c.a > 1.0) {
/* Faded in... */
side_image.c.a = 1.0;
side_image.fade_rate = 0.0;
} else if (side_image.c.a < 0.0) {
/* Faded out... */
gl_freeTexture( side_image.tex );
if (transition.tex != NULL) {
side_image.tex = transition.tex;
side_image.c.a = transition.c.a;
side_image.y = transition.y;
side_image.fade_rate = 0.1;
transition.tex = NULL;
transition.c.a = 1.0;
} else {
side_image.c.a = 1.0;
side_image.tex = NULL;
side_image.fade_rate = 0.0;
}
}
}
/* Clear stuff. */
glClear(GL_COLOR_BUFFER_BIT);
/* Only thing we actually care about updating is music. */
music_update( 0. );
/* Draw text. */
stop = intro_draw_text( sb_list, offset, line_height );
if (NULL != side_image.tex) {
/* Draw the image next to the text. */
gl_blitScale( side_image.tex, side_image.x, side_image.y,
side_image.tex->w, side_image.tex->h, &side_image.c );
}
if (NULL != transition.tex && transition.c.a > 0.0) {
/* Draw the image in transition. */
gl_blitScale( transition.tex, transition.x, transition.y,
transition.tex->w, transition.tex->h, &transition.c );
}
/* Display stuff. */
SDL_GL_SwapBuffers();
SDL_Delay(10); /* No need to burn CPU. */
/* Handle user events. */
intro_event_handler( &stop, &offset, &vel );
} /* while (!stop) */
/* free malloc'd memory. */
free( sb_arr );
if (NULL != side_image.tex) {
gl_freeTexture( side_image.tex );
}
if (NULL != transition.tex) {
gl_freeTexture( transition.tex );
}
/* Disable intro's key repeat. */
SDL_EnableKeyRepeat( 0, 0 );
/* Stop music, normal music will start shortly after. */
music_stop();
/* Clean up after the introduction. */
intro_cleanup();
return 0;
}
/**
* @brief Displays the introduction sequence.
*
* @brief text Path of text file to use.
* @brief mus Type of music to use (run through music.lua).
* @return 0 on success.
*/
int intro_display( const char *text, const char *mus )
{
int i, max;
unsigned int tcur, tlast;
double dt;
double x, y, vel;
double offset;
double density;
SDL_Event event;
/* Load the introduction. */
if (intro_load(text) < 0)
return -1;
/* Calculate velocity. */
density = ((double)intro_length / (double)intro_nlines); /* char / line */
density /= (double)intro_font.h; /* char / pixel */
vel = INTRO_SPEED / density; /* (char / s) * (pixel / char) = pixel / s */
/* Change music to intro music. */
if (mus != NULL)
music_choose(mus);
/* We need to clear key repeat to avoid infinite loops. */
toolkit_clearKey();
/* Prepare for intro loop. */
x = 100.;
y = 0.;
tlast = SDL_GetTicks();
offset = 0.;
max = intro_nlines + SCREEN_H / ((intro_font.h + 5.));
while (1) {
/* Get delta tick in seconds. */
tcur = SDL_GetTicks();
dt = (double)(tcur - tlast) / 1000.;
tlast = tcur;
/* Handle events. */
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_KEYDOWN:
/* Escape skips directly. */
if (event.key.keysym.sym == SDLK_ESCAPE)
offset = max * (intro_font.h + 5.);
/* Only Handle space from here down. */
else if (!nstd_isspace(event.key.keysym.sym))
break;
/* Purpose fallthrough. */
case SDL_JOYBUTTONDOWN:
offset += 250.;
default:
break;
}
}
/* Increment position. */
offset += vel * dt;
/* Clear stuff. */
glClear(GL_COLOR_BUFFER_BIT);
/* Draw the text. */
i = (int)(offset / (intro_font.h + 5.));
if (i > max) /* Out of lines. */
break;
y = offset - (i+1) * (intro_font.h + 5.);
while (i >= 0) {
/* Skip in line isn't valid. */
if (i >= intro_nlines) {
i--;
y += intro_font.h + 5.;
continue;
}
gl_print( &intro_font, x, y, &cConsole, intro_lines[i] );
/* Increment line and position. */
i--;
y += intro_font.h + 5.;
}
/* Only thing we actually care about updating is music. */
music_update();
/* Display stuff. */
SDL_GL_SwapBuffers();
SDL_Delay(10); /* No need to burn CPU. */
}
/* Stop music, normal music will start shortly after. */
music_stop();
/* Clean up after the introduction. */
intro_cleanup();
return 0;
}
