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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <sys/time.h>
/*
gcc test-gdk-idle.c -o test-gdk-idle `pkg-config --libs --cflags gtk+-2.0`
*/
#define VERSION "0.1"
static int TotalCycles = 100;
static gboolean Verbose;
static GdkPixbuf *pixbuf;
static unsigned long long
GetTimeInMillis(void)
{
struct timeval tp;
gettimeofday(&tp, 0);
return (unsigned long long)(tp.tv_sec * 1000) + (tp.tv_usec / 1000);
}
static gboolean
expose(GtkWidget *darea,
GdkEventExpose *event,
gpointer user_data)
{
int width, height;
width = darea->allocation.width;
height = darea->allocation.height;
gdk_draw_pixbuf (GDK_DRAWABLE(darea->window),
NULL,
pixbuf,
0, 0, 0, 0,
-1,
-1,
GDK_RGB_DITHER_NONE, 0, 0);
// gtk_widget_queue_draw_area(darea, 0, 0, width, height);
/* Assume this flushes ? */
gdk_display_flush(gdk_display_get_default());
return TRUE;
}
static gboolean
idle_cb (GtkWidget *w)
{
static int cycles = -1;
static unsigned long long start_clock = 0, finish_clock = 0, diff_clock;
GdkRectangle rect;
if (cycles == -1) cycles = TotalCycles;
if (cycles-- == 0) {
int size;
finish_clock = GetTimeInMillis();
diff_clock = finish_clock - start_clock;
size = w->allocation.width * w->allocation.height * 2; /* XXX Assumes 16bpp */
printf("test-gdk-idle: write speed: %lli KB/sec\n",
( (unsigned long long)(size/1024) * 1000 * TotalCycles) / diff_clock);
gtk_main_quit();
}
if (start_clock == 0) {
fprintf(stderr, "Getting start time\n");
start_clock = GetTimeInMillis();
}
rect.x = 0;
rect.y = 0;
rect.width = w->allocation.width;
rect.height = w->allocation.height;
gdk_window_invalidate_rect (w->window, &rect, TRUE);
gdk_window_process_updates (w->window, TRUE);
return TRUE;
}
static GdkPixbuf*
make_surface(GtkWidget *w)
{
int x, y, width, height, rowstride, n_channels = 3;
unsigned long long start_clock, finish_clock;
guchar *pixels, *p;
GdkPixbuf *pixbuf;
width = w->allocation.width;
height = w->allocation.height;
start_clock = GetTimeInMillis();
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
for(y=0; y < height; y++)
for(x=0; x < width; x++)
{
guchar b = 10 + x ;
guchar g = y;
guchar r = x - y;
p = pixels + y * rowstride + x * n_channels;
p[0] = b; p[1] = g; p[2] = r;
}
finish_clock = GetTimeInMillis();
if (Verbose)
{
printf("test-gdk-idle: Surface ( %u X %u, %lu KB ) Created in %lli ms\n",
width, height, width * height * 2 / 1024, finish_clock - start_clock);
}
return pixbuf;
}
static void
usage(void)
{
fprintf(stderr,
"test-gdk-idle " VERSION "\n"
"usage: test-gdk-idle [--verbose] [--buffered] [--cycles <int>]\n");
exit(1);
}
int
main(int argc, char **argv)
{
gboolean Buffered = FALSE;
GtkWidget *window = 0;
GtkWidget *darea = 0;
int i;
gtk_init(&argc, &argv);
for (i = 1; i < argc; i++) {
if (!strcmp ("--verbose", argv[i]) || !strcmp ("-v", argv[i])) {
Verbose = TRUE;
continue;
}
if (!strcmp ("--buffered", argv[i]) || !strcmp ("-b", argv[i])) {
Buffered = TRUE;
continue;
}
if (!strcmp ("--cycles", argv[i])) {
if (++i>=argc) usage ();
TotalCycles = atoi(argv[i]);
if (TotalCycles < 1) usage();
continue;
}
usage();
}
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window),
gdk_screen_get_width(gdk_display_get_default_screen (gdk_display_get_default ())),
gdk_screen_get_height(gdk_display_get_default_screen (gdk_display_get_default ())));
gtk_container_set_border_width(GTK_CONTAINER(window), 0);
darea = gtk_drawing_area_new();
gtk_widget_set_double_buffered (darea, Buffered);
gtk_container_add(GTK_CONTAINER(window), darea);
g_signal_connect(G_OBJECT(darea), "expose_event",
G_CALLBACK(expose), 0);
g_idle_add ((GSourceFunc)idle_cb, darea);
gtk_widget_show_all(window);
gtk_widget_map (window);
pixbuf = make_surface (darea);
gtk_main();
return 0;
}
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