static void
gezira_snowflake_render (gezira_snowflake_t *flake)
{
nile_Process_t *pipeline, *gate_, *COI;
Matrix_t M = Matrix ();
if (gezira_snowflake_offscreen (flake))
return;
M = Matrix_translate (M, WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2);
M = Matrix_scale (M, zoom, zoom);
M = Matrix_translate (M, -WINDOW_WIDTH / 2, -WINDOW_HEIGHT / 2);
M = Matrix_translate (M, flake->x, flake->y);
M = Matrix_rotate (M, flake->angle);
M = Matrix_scale (M, flake->scale, flake->scale);
COI = gezira_CompositeUniformColorOverImage_ARGB32 (init,
FLAKE_ALPHA, FLAKE_RED, FLAKE_GREEN, FLAKE_BLUE,
window.pixels, window.width, window.height, window.width);
gate_ = nile_Identity (init, 8);
nile_Process_gate (COI, gate_);
pipeline = nile_Process_pipe (
gezira_TransformBeziers (init, M.a, M.b, M.c, M.d, M.e, M.f),
gezira_ClipBeziers (init, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT),
gezira_Rasterize (init),
gate,
COI,
NILE_NULL);
nile_Process_feed (pipeline, snowflake_path, snowflake_path_n);
gate = gate_;
}
static void
gezira_snowflake_render (gezira_snowflake_t *flake,
gezira_Window_t *window, nile_Process_t *init)
{
nile_Process_t *pipeline;
Matrix_t M = Matrix ();
if (gezira_snowflake_offscreen (flake))
return;
M = Matrix_translate (M, WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2);
M = Matrix_scale (M, zoom, zoom);
M = Matrix_translate (M, -WINDOW_WIDTH / 2, -WINDOW_HEIGHT / 2);
M = Matrix_translate (M, flake->x, flake->y);
M = Matrix_rotate (M, flake->angle);
M = Matrix_scale (M, flake->scale, flake->scale);
pipeline = nile_Process_pipe (
gezira_TransformBeziers (init, M.a, M.b, M.c, M.d, M.e, M.f),
gezira_ClipBeziers (init, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT),
gezira_Rasterize (init),
gezira_CompositeUniformColorOverImage_ARGB32 (init,
&window->image,
FLAKE_ALPHA, FLAKE_RED, FLAKE_GREEN, FLAKE_BLUE),
NILE_NULL);
nile_Process_feed (pipeline, snowflake_path, snowflake_path_n);
}
int
main (int argc, char **argv)
{
int i;
gezira_snowflake_t flakes[NFLAKES];
int nthreads = 1;
int mem_size;
gezira_Window_init (&window, WINDOW_WIDTH, WINDOW_HEIGHT);
for (i = 0; i < NFLAKES; i++) {
flakes[i].x = gezira_random (0, window.width);
flakes[i].y = gezira_random (0, window.height);
flakes[i].dy = gezira_random (0.5, 3.0);
flakes[i].scale = gezira_random (0.2, 0.7);
flakes[i].angle = gezira_random (0, 4);
flakes[i].dangle = gezira_random (-0.1, 0.1);
}
mem_size = nthreads * NBYTES_PER_THREAD;
init = nile_startup (malloc (mem_size), mem_size, nthreads);
if (!init) {
fprintf (stderr, "nile_startup failed\n");
exit (1);
}
gate = nile_Identity (init, 8);
for (;;) {
char c = gezira_Window_key_pressed (&window);
while (c != -1) {
switch (c) {
case ')': nthreads = 10; break;
case '!': nthreads = 11; break;
case '@': nthreads = 12; break;
case '#': nthreads = 13; break;
case '$': nthreads = 14; break;
case '%': nthreads = 15; break;
case '^': nthreads = 16; break;
case '&': nthreads = 17; break;
case '*': nthreads = 18; break;
case '(': nthreads = 19; break;
case 'z': is_zooming = !is_zooming; break;
default: nthreads = c - '0'; break;
}
if (!nthreads)
break;
if (c == 'z')
break;
printf ("Requesting %d threads\n", nthreads); fflush (stdout);
if (nthreads < 0 || nthreads > 50)
printf ("Invalid thread count\n");
else {
nile_Process_feed (gate, NULL, 0);
nile_sync (init);
free (nile_shutdown (init));
mem_size = nthreads * NBYTES_PER_THREAD;
init = nile_startup (malloc (mem_size), mem_size, nthreads);
gate = nile_Identity (init, 8);
}
c = gezira_Window_key_pressed (&window);
}
if (!nthreads)
break;
gate = gezira_Window_update_and_clear (&window, init, gate, 1, 0, 0, 0);
for (i = 0; i < NFLAKES; i++) {
gezira_snowflake_render (&flakes[i]);
gezira_snowflake_update (&flakes[i]);
}
if (nile_error (init)) {
fprintf (stderr, "nile error (OOM)\n"); fflush (stderr);
break;
}
gezira_update_fps (init);
if (is_zooming) {
zoom += dzoom;
if (zoom > 8 || zoom < 1 - dzoom)
dzoom = -dzoom;
}
}
nile_Process_feed (gate, NULL, 0);
nile_sync (init);
free (nile_shutdown (init));
//printf ("Just Window_fini left\n"); fflush (stdout);
// TODO why does the line below cause a segfault every now and then?
//gezira_Window_fini (&window);
return 0;
}