#include <gtk/gtk.h>
#include <math.h>
+#define RADIUS 64
+#define DIAMETER (2*RADIUS)
#define WIDTH 600
#define HEIGHT 600
#define WINDOW_SIZE_JITTER 200
if (source_surface != NULL)
return;
- source_surface = cairo_surface_create_similar (target, CAIRO_CONTENT_COLOR_ALPHA, 2048, 2048);
+ source_surface = cairo_surface_create_similar (target, CAIRO_CONTENT_COLOR_ALPHA,
+ 16 * DIAMETER, 16 * DIAMETER);
cr = cairo_create(source_surface);
cairo_save(cr);
((i * 23) % 16) / 15.,
0.25);
cairo_arc(cr,
- i * 128 + 64, j * 128 + 64,
- 64 - 0.5, 0, 2 * M_PI);
+ i * DIAMETER + RADIUS, j * DIAMETER + RADIUS,
+ RADIUS - 0.5, 0, 2 * M_PI);
cairo_fill_preserve(cr);
cairo_set_source_rgba(cr,
((i * 41) % 16) / 15.,
{
int source = g_rand_int_range(rand, 0, 255);
double phi = g_rand_double_range(rand, 0, 2 * M_PI) + angle;
- double r = g_rand_double_range(rand, 0, width / 2 - 64);
+ double r = g_rand_double_range(rand, 0, width / 2 - RADIUS);
int x, y;
- int source_x = (source % 16) * 128;
- int source_y = (source / 16) * 128;
+ int source_x = (source % 16) * DIAMETER;
+ int source_y = (source / 16) * DIAMETER;
- x = round(width / 2 + r * cos(phi) - 64);
- y = round(height / 2 - r * sin(phi) - 64);
+ x = round(width / 2 + r * cos(phi) - RADIUS);
+ y = round(height / 2 - r * sin(phi) - RADIUS);
cairo_set_source_surface(cr, source_surface,
x - source_x, y - source_y);
- cairo_rectangle(cr, x, y, 128, 128);
+ cairo_rectangle(cr, x, y, DIAMETER, DIAMETER);
cairo_fill(cr);
}