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added new keyboard shortcut 'a' which adds alpha to the pixbuf; re-load

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2001-12-11  Michael Natterer  <mitch@gimp.org>

	* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
	adds alpha to the pixbuf; re-load the saved pixbuf and
	pixel-by-pixel compare it with the original one.
This commit is contained in:
Michael Natterer 2001-12-11 17:31:52 +00:00 committed by Michael Natterer
parent 3339931f8f
commit 3b72a77047
8 changed files with 151 additions and 6 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2001-12-11 Michael Natterer <mitch@gimp.org>
* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
adds alpha to the pixbuf; re-load the saved pixbuf and
pixel-by-pixel compare it with the original one.
Tue Dec 11 15:39:08 2001 Soeren Sandmann <sandmann@daimi.au.dk>
* ChangeLog: Fix wrong ChangeLog entry

6
ChangeLog.pre-2-0
View File

@ -1,3 +1,9 @@
2001-12-11 Michael Natterer <mitch@gimp.org>
* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
adds alpha to the pixbuf; re-load the saved pixbuf and
pixel-by-pixel compare it with the original one.
Tue Dec 11 15:39:08 2001 Soeren Sandmann <sandmann@daimi.au.dk>
* ChangeLog: Fix wrong ChangeLog entry

6
ChangeLog.pre-2-10
View File

@ -1,3 +1,9 @@
2001-12-11 Michael Natterer <mitch@gimp.org>
* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
adds alpha to the pixbuf; re-load the saved pixbuf and
pixel-by-pixel compare it with the original one.
Tue Dec 11 15:39:08 2001 Soeren Sandmann <sandmann@daimi.au.dk>
* ChangeLog: Fix wrong ChangeLog entry

6
ChangeLog.pre-2-2
View File

@ -1,3 +1,9 @@
2001-12-11 Michael Natterer <mitch@gimp.org>
* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
adds alpha to the pixbuf; re-load the saved pixbuf and
pixel-by-pixel compare it with the original one.
Tue Dec 11 15:39:08 2001 Soeren Sandmann <sandmann@daimi.au.dk>
* ChangeLog: Fix wrong ChangeLog entry

6
ChangeLog.pre-2-4
View File

@ -1,3 +1,9 @@
2001-12-11 Michael Natterer <mitch@gimp.org>
* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
adds alpha to the pixbuf; re-load the saved pixbuf and
pixel-by-pixel compare it with the original one.
Tue Dec 11 15:39:08 2001 Soeren Sandmann <sandmann@daimi.au.dk>
* ChangeLog: Fix wrong ChangeLog entry

6
ChangeLog.pre-2-6
View File

@ -1,3 +1,9 @@
2001-12-11 Michael Natterer <mitch@gimp.org>
* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
adds alpha to the pixbuf; re-load the saved pixbuf and
pixel-by-pixel compare it with the original one.
Tue Dec 11 15:39:08 2001 Soeren Sandmann <sandmann@daimi.au.dk>
* ChangeLog: Fix wrong ChangeLog entry

6
ChangeLog.pre-2-8
View File

@ -1,3 +1,9 @@
2001-12-11 Michael Natterer <mitch@gimp.org>
* demos/testpixbuf-save.c: added new keyboard shortcut 'a' which
adds alpha to the pixbuf; re-load the saved pixbuf and
pixel-by-pixel compare it with the original one.
Tue Dec 11 15:39:08 2001 Soeren Sandmann <sandmann@daimi.au.dk>
* ChangeLog: Fix wrong ChangeLog entry

115
demos/testpixbuf-save.c
View File

@ -1,10 +1,73 @@
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
#include "config.h"
#include <stdio.h>
#include <gtk/gtk.h>
void
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 void
keypress_check (GtkWidget *widget, GdkEventKey *evt, gpointer data)
{
GdkPixbuf *pixbuf;
@ -27,8 +90,20 @@ keypress_check (GtkWidget *widget, GdkEventKey *evt, gpointer data)
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
GdkPixbuf *compare;
compare = gdk_pixbuf_new_from_file ("foo.jpg", &err);
if (!compare) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
compare_pixbufs (pixbuf, compare, "jpeg");
g_object_unref (G_OBJECT (compare));
}
}
} else if (evt->keyval == 'p') {
if (pixbuf == NULL) {
fprintf (stderr, "PIXBUF NULL\n");
@ -41,19 +116,46 @@ keypress_check (GtkWidget *widget, GdkEventKey *evt, gpointer data)
NULL)) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
GdkPixbuf *compare;
compare = gdk_pixbuf_new_from_file ("foo.png", &err);
if (!compare) {
fprintf (stderr, "%s", err->message);
g_error_free (err);
} else {
compare_pixbufs (pixbuf, compare, "png");
g_object_unref (G_OBJECT (compare));
}
}
} else 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);
}
}
}
int
static int
close_app (GtkWidget *widget, gpointer data)
{
gtk_main_quit ();
return TRUE;
}
int
static int
expose_cb (GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
{
GdkPixbuf *pixbuf;
@ -86,7 +188,7 @@ expose_cb (GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
return FALSE;
}
int
static int
configure_cb (GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
{
GdkPixbuf *pixbuf;
@ -146,7 +248,8 @@ main (int argc, char **argv)
G_CALLBACK (configure_cb), NULL);
g_signal_connect (window, "key_press_event",
G_CALLBACK (keypress_check), drawing_area);
g_object_set_data (G_OBJECT (drawing_area), "pixbuf", pixbuf);
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);