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animated-resizing: make circle size a #define

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Clean up the code with a #define for circle size. This also allows
determining we're throttled by number-of-requests or number-of-pixels.

https://bugzilla.gnome.org/show_bug.cgi?id=685460
This commit is contained in:
Owen W. Taylor 2012-11-14 17:24:02 -05:00
parent 0def26ecf1
commit 574301d34d
1 changed files with 12 additions and 9 deletions
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21
tests/animated-resizing.c
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@ -3,6 +3,8 @@
#include <gtk/gtk.h> #include <gtk/gtk.h>
#include <math.h> #include <math.h>
#define RADIUS 64
#define DIAMETER (2*RADIUS)
#define WIDTH 600 #define WIDTH 600
#define HEIGHT 600 #define HEIGHT 600
#define WINDOW_SIZE_JITTER 200 #define WINDOW_SIZE_JITTER 200
@ -28,7 +30,8 @@ ensure_resources(cairo_surface_t *target)
if (source_surface != NULL) if (source_surface != NULL)
return; 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); cr = cairo_create(source_surface);
cairo_save(cr); cairo_save(cr);
@ -48,8 +51,8 @@ ensure_resources(cairo_surface_t *target)
((i * 23) % 16) / 15., ((i * 23) % 16) / 15.,
0.25); 0.25);
cairo_arc(cr, cairo_arc(cr,
i * 128 + 64, j * 128 + 64, i * DIAMETER + RADIUS, j * DIAMETER + RADIUS,
64 - 0.5, 0, 2 * M_PI); RADIUS - 0.5, 0, 2 * M_PI);
cairo_fill_preserve(cr); cairo_fill_preserve(cr);
cairo_set_source_rgba(cr, cairo_set_source_rgba(cr,
((i * 41) % 16) / 15., ((i * 41) % 16) / 15.,
@ -86,18 +89,18 @@ on_window_draw (GtkWidget *widget,
{ {
int source = g_rand_int_range(rand, 0, 255); int source = g_rand_int_range(rand, 0, 255);
double phi = g_rand_double_range(rand, 0, 2 * M_PI) + angle; 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 x, y;
int source_x = (source % 16) * 128; int source_x = (source % 16) * DIAMETER;
int source_y = (source / 16) * 128; int source_y = (source / 16) * DIAMETER;
x = round(width / 2 + r * cos(phi) - 64); x = round(width / 2 + r * cos(phi) - RADIUS);
y = round(height / 2 - r * sin(phi) - 64); y = round(height / 2 - r * sin(phi) - RADIUS);
cairo_set_source_surface(cr, source_surface, cairo_set_source_surface(cr, source_surface,
x - source_x, y - source_y); x - source_x, y - source_y);
cairo_rectangle(cr, x, y, 128, 128); cairo_rectangle(cr, x, y, DIAMETER, DIAMETER);
cairo_fill(cr); cairo_fill(cr);
} }