#define WIDTH 800
#define HEIGHT 600
+#define FPS (25)
+#define FRAME_INTERVAL (1000/FPS)
+#include <glib.h>
+
+#include <stdio.h>
+#include <stdlib.h>
#include <SDL.h>
#include <SDL_image.h>
+#define SWAP(x, y) do { \
+ x ^= y; y ^= x; x ^= y; \
+ } while (0)
+
#define IS_CENTER(cx, cy, x, y) \
((x + WIDTH/2 == cx) && (y + HEIGHT/2 == cy))
-SDL_Rect points[] = {
- {400, 300, 800, 600},
- {450, 350, 800, 600}
-};
+GArray *points;
+GPtrArray *names;
-SDL_Rect *
-GetNextPoint (void)
+void
+InsertLine (GArray *points, SDL_Rect *src, SDL_Rect *dst)
{
- static SDL_Rect rect = {0, 0, WIDTH, HEIGHT};
- static int cur = 0;
- int dx, dy;
- int next;
- next = (cur + 1) % (sizeof (points) / sizeof (SDL_Rect));
- if (IS_CENTER (points[next].x, points[next].y, rect.x, rect.y))
+ SDL_Rect rect;
+ int inc, err, thre, swap;
+ int x1, y1, x2, y2;
+ int x, y;
+ rect.w = WIDTH;
+ rect.h = HEIGHT;
+ err = 0;
+ swap = 0;
+ x1 = src->x;
+ y1 = src->y;
+ x2 = dst->x;
+ y2 = dst->y;
+ inc = y2 - y1;
+ thre = x2 - x1;
+ if (ABS (inc) > ABS (thre))
{
- cur = next;
- next = (cur + 1) % (sizeof (points) / sizeof (SDL_Rect));
+ SWAP (inc, thre);
+ SWAP (x1, y1);
+ SWAP (x2, y2);
+ swap = 1;
+ }
+ for (y = y1, x = x1; (x2 < x1) ? (x >= x2) : (x <= x2); (x2 < x1) ? x-- : x++)
+ {
+ rect.x = (swap ? y : x);
+ rect.y = (swap ? x : y);
+ g_array_append_val (points, rect);
+ err += ABS (inc);
+ if (err >= ABS (thre))
+ {
+ err -= ABS (thre);
+ y += (inc < 0) ? -1 : 1;
+ }
}
- dx = (points[next].x > points[cur].x) ? 1 : -1;
- dy = (points[next].y > points[cur].y) ? 1 : -1;
- rect.x = (rect.x + dx) % WIDTH;
- rect.y = (rect.y + dy) % HEIGHT;
- return ▭
}
void
-ShowPoint (SDL_Surface *screen, SDL_Surface *image, SDL_Rect *rect)
+ReadPoints (char *filename)
{
- SDL_BlitSurface (image, rect, screen, NULL);
- SDL_UpdateRect (screen, 0, 0, 0, 0);
+ FILE *file;
+ char *buffer;
+ char *next;
+ size_t len;
+ ssize_t r;
+ int i = 0;
+ SDL_Rect last;
+ SDL_Rect rect;
+ file = fopen (filename, "r");
+ points = g_array_new (FALSE, TRUE, sizeof (SDL_Rect));
+ names = g_ptr_array_new ();
+ buffer = NULL;
+ len = 0;
+ rect.x = rect.y = rect.w = rect.h = 0;
+ last = rect;
+ while (!feof (file))
+ {
+ r = getline (&buffer, &len, file);
+ buffer[r - 1] = '\0';
+ rect.x = strtol (buffer, &next, 0);
+ rect.y = strtol (next+1, &next, 0);
+ strtol (next, &next, 0);
+ if (i > 0)
+ InsertLine (points, &last, &rect);
+ while (isspace (*next)) next++;
+ g_ptr_array_add (names, strdup (next));
+ last = rect;
+ i++;
+ }
+ fclose (file);
}
-Uint32
-ShowNext (Uint32 interval, void *data)
+void
+ShowPoint (SDL_Surface *screen, SDL_Surface *image, SDL_Rect center, double scale)
{
- SDL_UserEvent event;
- event.type = SDL_USEREVENT;
- event.code = 0;
- SDL_PushEvent ((SDL_Event *) &event);
- return 33;
+ center.x = (center.x * scale) - WIDTH/2;
+ center.y = (center.y * scale) - HEIGHT/2;
+ center.w = WIDTH;
+ center.h = HEIGHT;
+ SDL_BlitSurface (image, ¢er, screen, NULL);
+ SDL_UpdateRect (screen, 0, 0, 0, 0);
}
+#define SCALE 2.0
+
int
main (int argc, char **argv)
{
SDL_Surface *screen;
SDL_Surface *image;
+ SDL_Surface *scaled_image;
+ SDL_Rect rect;
SDL_Event event;
+ Uint32 last, now, deslast, start;
+ int i, des, desl;
+ ReadPoints ("pro-gnu");
SDL_Init (SDL_INIT_VIDEO | SDL_INIT_TIMER);
- screen = SDL_SetVideoMode (800, 600, 32, SDL_HWSURFACE | SDL_DOUBLEBUF | SDL_FULLSCREEN);
+ screen = SDL_SetVideoMode (800, 600, 32, SDL_HWSURFACE | SDL_DOUBLEBUF);
image = IMG_Load ("/home/cascardo/fotos/debconf.jpg");
- SDL_AddTimer (0, ShowNext, NULL);
- while (SDL_WaitEvent (&event))
+ scaled_image = CairoScale (image, SCALE);
+ start = deslast = last = SDL_GetTicks ();
+ desl = des = i = 0;
+ while (1)
{
- if (event.type == SDL_KEYDOWN)
- break;
- else if (event.type == SDL_USEREVENT)
- ShowPoint (screen, image, GetNextPoint ());
+ if (SDL_PollEvent (&event))
+ {
+ if (event.type == SDL_KEYDOWN)
+ break;
+ }
+ now = SDL_GetTicks ();
+ /* skip */
+ while (now > last + FRAME_INTERVAL)
+ {
+ last += FRAME_INTERVAL;
+ i++;
+ }
+ last = now;
+ if (now > deslast + 1000)
+ {
+ printf ("%f %f %d\n", (double) des / (double) (now - start) * 1000, (double) (des - desl) / (double) (now - deslast) * 1000, i - des);
+ desl = des;
+ deslast = now;
+ }
+ if (i > points->len)
+ {
+ des -= i;
+ i = 0;
+ }
+ rect = g_array_index (points, SDL_Rect, i);
+ ShowPoint (screen, scaled_image, rect, SCALE);
+ SDL_Delay (FRAME_INTERVAL - (now - last));
+ i++;
+ des++;
}
SDL_FreeSurface (image);
SDL_Quit ();
+ g_array_free (points, TRUE);
+ for (i = 0; i < names->len; i++)
+ free (g_ptr_array_index (names, i));
+ g_ptr_array_free (names, TRUE);
return 0;
}