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mutter-performance-source/tests/interactive/test-cairo-flowers.c
Emmanuele Bassi 96cb1d7128 Disable deprecation warnings for the test suite
We test deprecated functionality as well as current one, so we need to
enable all symbols and disable the deprecation warnings.
2011-10-13 17:50:25 +01:00

223 lines
5.2 KiB
C

/*
* Pretty cairo flower hack.
*/
#include <clutter/clutter.h>
#ifndef _MSC_VER
#include <unistd.h> /* for sleep(), used for screenshots */
#endif
#include <stdlib.h>
#ifdef _MSC_VER
#define _USE_MATH_DEFINES
#endif
#include <math.h>
#define PETAL_MIN 20
#define PETAL_VAR 40
#define N_FLOWERS 40 /* reduce if you have a small card */
typedef struct Flower
{
ClutterActor *ctex;
gint x,y,rot,v,rv;
}
Flower;
ClutterActor*
make_flower_actor (void)
{
/* No science here, just a hack from toying */
gint i, j;
double colors[] = {
0.71, 0.81, 0.83,
1.0, 0.78, 0.57,
0.64, 0.30, 0.35,
0.73, 0.40, 0.39,
0.91, 0.56, 0.64,
0.70, 0.47, 0.45,
0.92, 0.75, 0.60,
0.82, 0.86, 0.85,
0.51, 0.56, 0.67,
1.0, 0.79, 0.58,
};
gint size;
gint petal_size;
gint n_groups; /* Num groups of petals 1-3 */
gint n_petals; /* num of petals 4 - 8 */
gint pm1, pm2;
gint idx, last_idx = -1;
ClutterActor *ctex;
cairo_t *cr;
petal_size = PETAL_MIN + rand() % PETAL_VAR;
size = petal_size * 8;
n_groups = rand() % 3 + 1;
ctex = clutter_cairo_texture_new (size, size);
cr = clutter_cairo_texture_create (CLUTTER_CAIRO_TEXTURE (ctex));
cairo_set_tolerance (cr, 0.1);
/* Clear */
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_translate(cr, size/2, size/2);
for (i=0; i<n_groups; i++)
{
n_petals = rand() % 5 + 4;
cairo_save (cr);
cairo_rotate (cr, rand() % 6);
do {
idx = (rand() % (sizeof (colors) / sizeof (double) / 3)) * 3;
} while (idx == last_idx);
cairo_set_source_rgba (cr, colors[idx], colors[idx+1],
colors[idx+2], 0.5);
last_idx = idx;
/* some bezier randomness */
pm1 = rand() % 20;
pm2 = rand() % 4;
for (j=1; j<n_petals+1; j++)
{
cairo_save (cr);
cairo_rotate (cr, ((2*M_PI)/n_petals)*j);
/* Petals are made up beziers */
cairo_new_path (cr);
cairo_move_to (cr, 0, 0);
cairo_rel_curve_to (cr,
petal_size, petal_size,
(pm2+2)*petal_size, petal_size,
(2*petal_size) + pm1, 0);
cairo_rel_curve_to (cr,
0 + (pm2*petal_size), -petal_size,
-petal_size, -petal_size,
-((2*petal_size) + pm1), 0);
cairo_close_path (cr);
cairo_fill (cr);
cairo_restore (cr);
}
petal_size -= rand() % (size/8);
cairo_restore (cr);
}
/* Finally draw flower center */
do {
idx = (rand() % (sizeof (colors) / sizeof (double) / 3)) * 3;
} while (idx == last_idx);
if (petal_size < 0)
petal_size = rand() % 10;
cairo_set_source_rgba (cr, colors[idx], colors[idx+1], colors[idx+2], 0.5);
cairo_arc(cr, 0, 0, petal_size, 0, M_PI * 2);
cairo_fill(cr);
cairo_destroy(cr);
return ctex;
}
static void
tick (ClutterTimeline *timeline,
gint msecs,
gpointer data)
{
Flower **flowers = (Flower**)data;
gint i = 0;
for (i = 0; i < N_FLOWERS; i++)
{
ClutterActor *stage;
flowers[i]->y += flowers[i]->v;
flowers[i]->rot += flowers[i]->rv;
stage = clutter_stage_get_default ();
if (flowers[i]->y > (gint) clutter_actor_get_height (stage))
flowers[i]->y = -clutter_actor_get_height (flowers[i]->ctex);
clutter_actor_set_position (flowers[i]->ctex,
flowers[i]->x, flowers[i]->y);
clutter_actor_set_rotation (flowers[i]->ctex,
CLUTTER_Z_AXIS,
flowers[i]->rot,
clutter_actor_get_width (flowers[i]->ctex)/2,
clutter_actor_get_height (flowers[i]->ctex)/2,
0);
}
}
int
test_cairo_flowers_main (int argc, char **argv)
{
int i;
ClutterActor *stage;
ClutterColor stage_color = { 0x0, 0x0, 0x0, 0xff };
ClutterTimeline *timeline;
Flower *flowers[N_FLOWERS];
srand (time (NULL));
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return 1;
stage = clutter_stage_get_default ();
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
for (i=0; i< N_FLOWERS; i++)
{
flowers[i] = g_new0(Flower, 1);
flowers[i]->ctex = make_flower_actor();
flowers[i]->x = rand() % (int) clutter_actor_get_width (stage)
- (PETAL_MIN + PETAL_VAR) * 2;
flowers[i]->y = rand() % (int) clutter_actor_get_height (stage);
flowers[i]->rv = rand() % 5 + 1;
flowers[i]->v = rand() % 10 + 2;
clutter_container_add_actor (CLUTTER_CONTAINER (stage),
flowers[i]->ctex);
clutter_actor_set_position (flowers[i]->ctex,
flowers[i]->x, flowers[i]->y);
}
/* Create a timeline to manage animation */
timeline = clutter_timeline_new (6000);
clutter_timeline_set_loop (timeline, TRUE);
/* fire a callback for frame change */
g_signal_connect (timeline, "new-frame", G_CALLBACK (tick), flowers);
clutter_actor_show (stage);
clutter_timeline_start (timeline);
g_signal_connect (stage, "key-press-event",
G_CALLBACK (clutter_main_quit),
NULL);
clutter_main();
return EXIT_SUCCESS;
}