/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
#include "config.h"
#include <stdio.h>
#include <gtk/gtk.h>
static void
compare_pixbufs (GdkPixbuf *pixbuf, GdkPixbuf *compare, const gchar *file_type)
{
if ((gdk_pixbuf_get_width (pixbuf) !=
gdk_pixbuf_get_width (compare)) ||
(gdk_pixbuf_get_height (pixbuf) !=
gdk_pixbuf_get_height (compare)) ||
(gdk_pixbuf_get_n_channels (pixbuf) !=
gdk_pixbuf_get_n_channels (compare)) ||
(gdk_pixbuf_get_has_alpha (pixbuf) !=
gdk_pixbuf_get_has_alpha (compare)) ||
(gdk_pixbuf_get_bits_per_sample (pixbuf) !=
gdk_pixbuf_get_bits_per_sample (compare))) {
fprintf (stderr,
"saved %s file differs from copy in memory\n",
file_type);
} else {
guchar *orig_pixels;
guchar *compare_pixels;
gint orig_rowstride;
gint compare_rowstride;
gint width;
gint height;
gint bytes_per_pixel;
gint x, y;
guchar *p1, *p2;
gint count = 0;
orig_pixels = gdk_pixbuf_get_pixels (pixbuf);
compare_pixels = gdk_pixbuf_get_pixels (compare);
orig_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
compare_rowstride = gdk_pixbuf_get_rowstride (compare);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
/* well... */
bytes_per_pixel = gdk_pixbuf_get_n_channels (pixbuf);
p1 = orig_pixels;
p2 = compare_pixels;
for (y = 0; y < height; y++) {
for (x = 0; x < width * bytes_per_pixel; x++)
count += (*p1++ != *p2++);
orig_pixels += orig_rowstride;
compare_pixels += compare_rowstride;
p1 = orig_pixels;
p2 = compare_pixels;
}
if (count > 0) {
fprintf (stderr,
"saved %s file differs from copy in memory\n",
file_type);
}
}
}
static gboolean
save_to_loader (const gchar *buf, gsize count, GError **err, gpointer data)
{
GdkPixbufLoader *loader = data;
return gdk_pixbuf_loader_write (loader, (const guchar *)buf, count, err);
}
static GdkPixbuf *
buffer_to_pixbuf (const gchar *buf, gsize count, GError **err)
{
GdkPixbufLoader *loader;
GdkPixbuf *pixbuf;
loader = gdk_pixbuf_loader_new ();
if (gdk_pixbuf_loader_write (loader, (const guchar *)buf, count, err) &&
gdk_pixbuf_loader_close (loader, err)) {
pixbuf = g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader));
g_object_unref (loader);
return pixbuf;
} else {
return NULL;
}
}
static void
do_compare (GdkPixbuf *pixbuf, GdkPixbuf *compare, GError *err)
{
if (compare == NULL) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
compare_pixbufs (pixbuf, compare, "jpeg");
g_object_unref (compare);
}
}
static void
keypress_check (GtkWidget *widget, GdkEventKey *evt, gpointer data)
{
GdkPixbuf *pixbuf;
GtkDrawingArea *da = (GtkDrawingArea*)data;
GError *err = NULL;
gchar *buffer;
gsize count;
GdkPixbufLoader *loader;
pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (da), "pixbuf");
if (evt->keyval == 'q')
gtk_main_quit ();
if (evt->keyval == 's' && (evt->state & GDK_CONTROL_MASK)) {
/* save to callback */
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
return;
}
loader = gdk_pixbuf_loader_new ();
if (!gdk_pixbuf_save_to_callback (pixbuf, save_to_loader, loader, "jpeg",
&err,
"quality", "100",
NULL) ||
!gdk_pixbuf_loader_close (loader, &err)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare (pixbuf,
g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader)),
err);
g_object_unref (loader);
}
}
else if (evt->keyval == 'S') {
/* save to buffer */
if (!gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &count, "jpeg",
&err,
"quality", "100",
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare (pixbuf,
buffer_to_pixbuf (buffer, count, &err),
err);
}
}
else if (evt->keyval == 's') {
/* save normally */
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
return;
}
if (!gdk_pixbuf_save (pixbuf, "foo.jpg", "jpeg",
&err,
"quality", "100",
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare (pixbuf,
gdk_pixbuf_new_from_file ("foo.jpg", &err),
err);
}
}
if (evt->keyval == 'p' && (evt->state & GDK_CONTROL_MASK)) {
/* save to callback */
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
return;
}
loader = gdk_pixbuf_loader_new ();
if (!gdk_pixbuf_save_to_callback (pixbuf, save_to_loader, loader, "png",
&err,
"tEXt::Software", "testpixbuf-save",
NULL)
|| !gdk_pixbuf_loader_close (loader, &err)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare (pixbuf,
g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader)),
err);
g_object_unref (loader);
}
}
else if (evt->keyval == 'P') {
/* save to buffer */
if (!gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &count, "png",
&err,
"tEXt::Software", "testpixbuf-save",
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare (pixbuf,
buffer_to_pixbuf (buffer, count, &err),
err);
}
}
else if (evt->keyval == 'p') {
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
return;
}
if (!gdk_pixbuf_save (pixbuf, "foo.png", "png",
&err,
"tEXt::Software", "testpixbuf-save",
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare(pixbuf,
gdk_pixbuf_new_from_file ("foo.png", &err),
err);
}
}
if (evt->keyval == 'i' && (evt->state & GDK_CONTROL_MASK)) {
/* save to callback */
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
return;
}
loader = gdk_pixbuf_loader_new ();
if (!gdk_pixbuf_save_to_callback (pixbuf, save_to_loader, loader, "ico",
&err,
NULL)
|| !gdk_pixbuf_loader_close (loader, &err)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare (pixbuf,
g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader)),
err);
g_object_unref (loader);
}
}
else if (evt->keyval == 'I') {
/* save to buffer */
if (!gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &count, "ico",
&err,
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare (pixbuf,
buffer_to_pixbuf (buffer, count, &err),
err);
}
}
else if (evt->keyval == 'i') {
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
return;
}
if (!gdk_pixbuf_save (pixbuf, "foo.ico", "ico",
&err,
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
do_compare(pixbuf,
gdk_pixbuf_new_from_file ("foo.ico", &err),
err);
}
}
if (evt->keyval == 'a') {
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
return;
} else {
GdkPixbuf *alpha_buf;
alpha_buf = gdk_pixbuf_add_alpha (pixbuf,
FALSE, 0, 0, 0);
g_object_set_data_full (G_OBJECT (da),
"pixbuf", alpha_buf,
(GDestroyNotify) g_object_unref);
}
}
}
static int
close_app (GtkWidget *widget, gpointer data)
{
gtk_main_quit ();
return TRUE;
}
static int
expose_cb (GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
{
GdkPixbuf *pixbuf;
cairo_t *cr;
pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (drawing_area),
"pixbuf");
cr = gdk_cairo_create (evt->window);
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
gdk_cairo_rectangle (cr, &evt->area);
cairo_fill (cr);
cairo_destroy (cr);
return FALSE;
}
static int
configure_cb (GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
{
GdkPixbuf *pixbuf;
pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (drawing_area),
"pixbuf");
g_print ("X:%d Y:%d\n", evt->width, evt->height);
if (evt->width != gdk_pixbuf_get_width (pixbuf) || evt->height != gdk_pixbuf_get_height (pixbuf)) {
GdkWindow *root;
GdkPixbuf *new_pixbuf;
root = gdk_get_default_root_window ();
new_pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
0, 0, 0, 0, evt->width, evt->height);
g_object_set_data_full (G_OBJECT (drawing_area), "pixbuf", new_pixbuf,
(GDestroyNotify) g_object_unref);
}
return FALSE;
}
int
main (int argc, char **argv)
{
GdkWindow *root;
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *drawing_area;
GdkPixbuf *pixbuf;
gtk_init (&argc, &argv);
root = gdk_get_default_root_window ();
pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
0, 0, 0, 0, 150, 160);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "delete_event",
G_CALLBACK (close_app), NULL);
g_signal_connect (window, "destroy",
G_CALLBACK (close_app), NULL);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (GTK_WIDGET (drawing_area),
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
g_signal_connect (drawing_area, "expose_event",
G_CALLBACK (expose_cb), NULL);
g_signal_connect (drawing_area, "configure_event",
G_CALLBACK (configure_cb), NULL);
g_signal_connect (window, "key_press_event",
G_CALLBACK (keypress_check), drawing_area);
g_object_set_data_full (G_OBJECT (drawing_area), "pixbuf", pixbuf,
(GDestroyNotify) g_object_unref);
gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}