mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-18 09:00:34 +00:00
395 lines
14 KiB
C
395 lines
14 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
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#include "config.h"
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#include <stdio.h>
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#include <gtk/gtk.h>
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static void
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compare_pixbufs (GdkPixbuf *pixbuf, GdkPixbuf *compare, const gchar *file_type)
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{
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if ((gdk_pixbuf_get_width (pixbuf) !=
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gdk_pixbuf_get_width (compare)) ||
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(gdk_pixbuf_get_height (pixbuf) !=
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gdk_pixbuf_get_height (compare)) ||
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(gdk_pixbuf_get_n_channels (pixbuf) !=
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gdk_pixbuf_get_n_channels (compare)) ||
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(gdk_pixbuf_get_has_alpha (pixbuf) !=
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gdk_pixbuf_get_has_alpha (compare)) ||
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(gdk_pixbuf_get_bits_per_sample (pixbuf) !=
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gdk_pixbuf_get_bits_per_sample (compare))) {
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fprintf (stderr,
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"saved %s file differs from copy in memory\n",
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file_type);
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} else {
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guchar *orig_pixels;
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guchar *compare_pixels;
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gint orig_rowstride;
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gint compare_rowstride;
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gint width;
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gint height;
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gint bytes_per_pixel;
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gint x, y;
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guchar *p1, *p2;
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gint count = 0;
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orig_pixels = gdk_pixbuf_get_pixels (pixbuf);
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compare_pixels = gdk_pixbuf_get_pixels (compare);
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orig_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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compare_rowstride = gdk_pixbuf_get_rowstride (compare);
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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/* well... */
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bytes_per_pixel = gdk_pixbuf_get_n_channels (pixbuf);
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p1 = orig_pixels;
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p2 = compare_pixels;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width * bytes_per_pixel; x++)
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count += (*p1++ != *p2++);
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orig_pixels += orig_rowstride;
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compare_pixels += compare_rowstride;
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p1 = orig_pixels;
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p2 = compare_pixels;
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}
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if (count > 0) {
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fprintf (stderr,
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"saved %s file differs from copy in memory\n",
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file_type);
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}
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}
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}
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static gboolean
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save_to_loader (const gchar *buf, gsize count, GError **err, gpointer data)
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{
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GdkPixbufLoader *loader = data;
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return gdk_pixbuf_loader_write (loader, (const guchar *)buf, count, err);
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}
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static GdkPixbuf *
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buffer_to_pixbuf (const gchar *buf, gsize count, GError **err)
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{
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GdkPixbufLoader *loader;
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GdkPixbuf *pixbuf;
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loader = gdk_pixbuf_loader_new ();
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if (gdk_pixbuf_loader_write (loader, (const guchar *)buf, count, err) &&
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gdk_pixbuf_loader_close (loader, err)) {
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pixbuf = g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader));
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g_object_unref (loader);
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return pixbuf;
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} else {
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return NULL;
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}
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}
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static void
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do_compare (GdkPixbuf *pixbuf, GdkPixbuf *compare, GError *err)
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{
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if (compare == NULL) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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compare_pixbufs (pixbuf, compare, "jpeg");
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g_object_unref (compare);
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}
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}
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static void
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keypress_check (GtkWidget *widget, GdkEventKey *evt, gpointer data)
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{
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GdkPixbuf *pixbuf;
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GtkDrawingArea *da = (GtkDrawingArea*)data;
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GError *err = NULL;
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gchar *buffer;
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gsize count;
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GdkPixbufLoader *loader;
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pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (da), "pixbuf");
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if (evt->keyval == 'q')
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gtk_main_quit ();
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if (evt->keyval == 's' && (evt->state & GDK_CONTROL_MASK)) {
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/* save to callback */
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if (pixbuf == NULL) {
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fprintf (stderr, "PIXBUF NULL\n");
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return;
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}
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loader = gdk_pixbuf_loader_new ();
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if (!gdk_pixbuf_save_to_callback (pixbuf, save_to_loader, loader, "jpeg",
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&err,
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"quality", "100",
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NULL) ||
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!gdk_pixbuf_loader_close (loader, &err)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare (pixbuf,
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g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader)),
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err);
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g_object_unref (loader);
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}
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}
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else if (evt->keyval == 'S') {
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/* save to buffer */
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if (!gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &count, "jpeg",
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&err,
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"quality", "100",
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NULL)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare (pixbuf,
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buffer_to_pixbuf (buffer, count, &err),
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err);
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}
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}
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else if (evt->keyval == 's') {
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/* save normally */
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if (pixbuf == NULL) {
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fprintf (stderr, "PIXBUF NULL\n");
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return;
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}
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if (!gdk_pixbuf_save (pixbuf, "foo.jpg", "jpeg",
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&err,
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"quality", "100",
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NULL)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare (pixbuf,
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gdk_pixbuf_new_from_file ("foo.jpg", &err),
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err);
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}
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}
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if (evt->keyval == 'p' && (evt->state & GDK_CONTROL_MASK)) {
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/* save to callback */
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if (pixbuf == NULL) {
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fprintf (stderr, "PIXBUF NULL\n");
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return;
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}
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loader = gdk_pixbuf_loader_new ();
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if (!gdk_pixbuf_save_to_callback (pixbuf, save_to_loader, loader, "png",
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&err,
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"tEXt::Software", "testpixbuf-save",
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NULL)
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|| !gdk_pixbuf_loader_close (loader, &err)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare (pixbuf,
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g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader)),
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err);
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g_object_unref (loader);
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}
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}
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else if (evt->keyval == 'P') {
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/* save to buffer */
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if (!gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &count, "png",
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&err,
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"tEXt::Software", "testpixbuf-save",
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NULL)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare (pixbuf,
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buffer_to_pixbuf (buffer, count, &err),
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err);
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}
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}
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else if (evt->keyval == 'p') {
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if (pixbuf == NULL) {
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fprintf (stderr, "PIXBUF NULL\n");
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return;
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}
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if (!gdk_pixbuf_save (pixbuf, "foo.png", "png",
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&err,
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"tEXt::Software", "testpixbuf-save",
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NULL)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare(pixbuf,
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gdk_pixbuf_new_from_file ("foo.png", &err),
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err);
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}
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}
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if (evt->keyval == 'i' && (evt->state & GDK_CONTROL_MASK)) {
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/* save to callback */
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if (pixbuf == NULL) {
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fprintf (stderr, "PIXBUF NULL\n");
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return;
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}
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loader = gdk_pixbuf_loader_new ();
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if (!gdk_pixbuf_save_to_callback (pixbuf, save_to_loader, loader, "ico",
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&err,
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NULL)
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|| !gdk_pixbuf_loader_close (loader, &err)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare (pixbuf,
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g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader)),
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err);
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g_object_unref (loader);
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}
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}
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else if (evt->keyval == 'I') {
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/* save to buffer */
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if (!gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &count, "ico",
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&err,
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NULL)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare (pixbuf,
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buffer_to_pixbuf (buffer, count, &err),
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err);
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}
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}
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else if (evt->keyval == 'i') {
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if (pixbuf == NULL) {
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fprintf (stderr, "PIXBUF NULL\n");
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return;
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}
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if (!gdk_pixbuf_save (pixbuf, "foo.ico", "ico",
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&err,
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NULL)) {
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fprintf (stderr, "%s", err->message);
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g_error_free (err);
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} else {
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do_compare(pixbuf,
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gdk_pixbuf_new_from_file ("foo.ico", &err),
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err);
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}
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}
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if (evt->keyval == 'a') {
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if (pixbuf == NULL) {
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fprintf (stderr, "PIXBUF NULL\n");
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return;
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} else {
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GdkPixbuf *alpha_buf;
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alpha_buf = gdk_pixbuf_add_alpha (pixbuf,
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FALSE, 0, 0, 0);
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g_object_set_data_full (G_OBJECT (da),
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"pixbuf", alpha_buf,
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(GDestroyNotify) g_object_unref);
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}
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}
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}
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static int
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close_app (GtkWidget *widget, gpointer data)
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{
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gtk_main_quit ();
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return TRUE;
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}
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static int
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expose_cb (GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
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{
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GdkPixbuf *pixbuf;
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cairo_t *cr;
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pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (drawing_area),
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"pixbuf");
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cr = gdk_cairo_create (evt->window);
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gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
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gdk_cairo_rectangle (cr, &evt->area);
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cairo_fill (cr);
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cairo_destroy (cr);
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return FALSE;
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}
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static int
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configure_cb (GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
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{
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GdkPixbuf *pixbuf;
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pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (drawing_area),
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"pixbuf");
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g_print ("X:%d Y:%d\n", evt->width, evt->height);
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if (evt->width != gdk_pixbuf_get_width (pixbuf) || evt->height != gdk_pixbuf_get_height (pixbuf)) {
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GdkWindow *root;
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GdkPixbuf *new_pixbuf;
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root = gdk_get_default_root_window ();
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new_pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
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0, 0, 0, 0, evt->width, evt->height);
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g_object_set_data_full (G_OBJECT (drawing_area), "pixbuf", new_pixbuf,
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(GDestroyNotify) g_object_unref);
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}
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return FALSE;
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}
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int
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main (int argc, char **argv)
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{
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GdkWindow *root;
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GtkWidget *window;
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GtkWidget *vbox;
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GtkWidget *drawing_area;
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GdkPixbuf *pixbuf;
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gtk_init (&argc, &argv);
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root = gdk_get_default_root_window ();
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pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
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0, 0, 0, 0, 150, 160);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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g_signal_connect (window, "delete_event",
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G_CALLBACK (close_app), NULL);
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g_signal_connect (window, "destroy",
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G_CALLBACK (close_app), NULL);
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vbox = gtk_vbox_new (FALSE, 0);
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gtk_container_add (GTK_CONTAINER (window), vbox);
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drawing_area = gtk_drawing_area_new ();
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gtk_widget_set_size_request (GTK_WIDGET (drawing_area),
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gdk_pixbuf_get_width (pixbuf),
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gdk_pixbuf_get_height (pixbuf));
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g_signal_connect (drawing_area, "expose_event",
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G_CALLBACK (expose_cb), NULL);
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g_signal_connect (drawing_area, "configure_event",
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G_CALLBACK (configure_cb), NULL);
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g_signal_connect (window, "key_press_event",
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G_CALLBACK (keypress_check), drawing_area);
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g_object_set_data_full (G_OBJECT (drawing_area), "pixbuf", pixbuf,
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(GDestroyNotify) g_object_unref);
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gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
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gtk_widget_show_all (window);
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gtk_main ();
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return 0;
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}
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