/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */ #include "config.h" #include #include 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; GtkDrawingArea *da = (GtkDrawingArea*)data; GError *err = NULL; pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (da), "pixbuf"); if (evt->keyval == 'q') gtk_main_quit (); if (evt->keyval == 's') { 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 { 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"); 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 { 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); } } } 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; pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (drawing_area), "pixbuf"); if (gdk_pixbuf_get_has_alpha (pixbuf)) { gdk_draw_rgb_32_image (drawing_area->window, drawing_area->style->black_gc, evt->area.x, evt->area.y, evt->area.width, evt->area.height, GDK_RGB_DITHER_MAX, gdk_pixbuf_get_pixels (pixbuf) + (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) + (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)), gdk_pixbuf_get_rowstride (pixbuf)); } else { gdk_draw_rgb_image (drawing_area->window, drawing_area->style->black_gc, evt->area.x, evt->area.y, evt->area.width, evt->area.height, GDK_RGB_DITHER_NORMAL, gdk_pixbuf_get_pixels (pixbuf) + (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) + (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)), gdk_pixbuf_get_rowstride (pixbuf)); } 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); gtk_widget_set_default_colormap (gdk_rgb_get_colormap ()); 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; }