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#include <math.h>
#include <stdlib.h>
#include <stdint.h>
#include <gtk/gtk.h>
#include "fft.h"
static GdkPixbuf *
pixbuf_from_buffer (complex_t *buffer, int n)
{
GdkPixbuf *pixbuf =
gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, n, n);
guint32 *p_bits = (guint32 *)gdk_pixbuf_get_pixels (pixbuf);
int p_stride = gdk_pixbuf_get_rowstride (pixbuf);
int w, h, total, set;
total = 0;
set = 0;
for (h = 0; h < n; ++h)
{
for (w = 0; w < n; ++w)
{
unsigned char *pb = (unsigned char *)p_bits;
complex_t c = buffer[h * n + w];
double v;
int vi;
int g;
double no;
pb += h * p_stride + w * 4;
no = c.re;
#define THRESHOLD (0.5)
total++;
if (THRESHOLD + 2 * (no - 0.5) >= 0.5)
{
g = 0xff;
set++;
}
else if (THRESHOLD + 2 * (no - 0.5) >= -0.5)
{
g = 0x80;
}
else if (THRESHOLD + 2 * (no - 0.5) >= -1.5)
{
g = 0x00;
set--;
}
else
{
printf ("asdf\n");
g = 100;
}
#if 0
vi *= 0x0f;
#endif
#define SADD(v,a) (((v) + (a) > 0xff)? 0xff : ((v) + (a) < 0)? 0 : ((v) + (a)))
g = ((double)w / n) * 255;
#if 0
if (vi + g > 0xff)
pb[0] = pb[1] = pb[2] = 0xff;
else
pb[0] = pb[1] = pb[2] = 0x00;
#endif
#if 0
vi = (v - 0x80);
vi >>= 3;
int rr, gg, bb;
rr = 0x20 + 0.5 * g;
gg = 0x20 + 0.5 * g;
bb = 0 + 0.3 * g;
pb[0] = SADD (rr, vi);
pb[1] = SADD (gg, - (vi));
pb[2] = SADD (bb, vi);
pb[3] = 0xff;
pb[0] = SADD (rr, 0.5 * vi);
pb[1] = SADD (gg, - 0.5 * vi);
pb[2] = SADD (bb, 2 * vi);
pb[3] = 0xff;
#endif
pb[0] = g;
pb[1] = g;
pb[2] = g;
pb[3] = 0xff;
#define TRUNC(x, n) \
x >>= (8 - n); \
x <<= (8 - n); \
x |= x >> n; \
x |= x >> (2 * n)
#if 0
TRUNC(pb[0], 5);
TRUNC(pb[1], 6);
TRUNC(pb[2], 5);
#endif
}
}
printf ("%d of %d (%f)\n", set, total, (double)set / total);
return pixbuf;
}
#define SIZE 1024
#define SIZE 1024
static gboolean
on_expose (GtkWidget *widget, GdkEventExpose *expose, gpointer data)
{
GdkPixbuf *pixbuf = data;
int i, j;
int pwidth = gdk_pixbuf_get_width (pixbuf);
int pheight = gdk_pixbuf_get_height (pixbuf);
int dwidth, dheight;
gdk_drawable_get_size (widget->window, &dwidth, &dheight);
for (i = 0; i < dheight; i += pheight)
{
for (j = 0; j < dwidth; j += pwidth)
{
gdk_draw_pixbuf (widget->window, NULL,
pixbuf, 0, 0, j, i, pwidth, pheight,
GDK_RGB_DITHER_NONE,
0, 0);
}
}
return TRUE;
}
void
show_image (const char *name, complex_t *image, int n)
{
GtkWidget *window, *da;
GdkPixbuf *pixbuf;
int argc;
char **argv;
char *arg0 = g_strdup (name);
argc = 1;
argv = (char **)&arg0;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
da = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (window), da);
gtk_window_set_default_size (GTK_WINDOW (window), SIZE, SIZE);
pixbuf = pixbuf_from_buffer (image, n);
g_signal_connect (da, "expose_event", G_CALLBACK (on_expose), pixbuf);
g_signal_connect (window, "delete_event", G_CALLBACK (gtk_main_quit), NULL);
gtk_widget_show_all (window);
gtk_main ();
}
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