Pixbuf saving, patch from David Welton.

2000-10-05  Havoc Pennington  <hp@redhat.com>

        Pixbuf saving, patch from David Welton.

	* Makefile.am (GDK_PIXBUF_LIBS): add INTLLIBS
	(libgdk_pixbuf_1_3_la_SOURCES): add gdk-pixbuf-i18n.h

	* gdk-pixbuf-i18n.h: Add _() to gdk-pixbuf

	* io-png.c (gdk_pixbuf__png_image_save): PNG save routine.

	* io-jpeg.c (gdk_pixbuf__jpeg_image_save): JPEG save routine.

	* gdk-pixbuf-io.c (gdk_pixbuf_save):
	(gdk_pixbuf_savev): Implement pixbuf saving routines

	* gdk-pixbuf.c (gdk_pixbuf_error_quark): pixbuf error quark
	function

	* gdk-pixbuf.h: Add public save routines; add pixbuf error
	types

	* gdk-pixbuf-io.h: Add save function to GdkPixbufModule

2000-10-05  Havoc Pennington  <hp@redhat.com>

        * demos/testpixbuf-save.c: add pixbuf save test

	* demos/Makefile.am: add testpixbuf-save.c

1 files changed, 154 insertions, 0 deletions

diff --git a/demos/testpixbuf-save.c b/demos/testpixbuf-save.c
new file mode 100644
index 000000000..802f98494
--- /dev/null
+++ b/demos/testpixbuf-save.c
@@ -0,0 +1,154 @@
+
+#include <config.h>
+/* if building outside GTK, remove /x11 part */
+#include <gdk/x11/gdkx.h>
+#include <gtk/gtk.h>
+#include <stdio.h>
+
+
+void
+keypress_check (GtkWidget *widget, GdkEventKey *evt, gpointer data)
+{
+        GdkPixbuf *pixbuf;
+        GtkDrawingArea *da = (GtkDrawingArea*)data;
+        GError *err = NULL;
+        
+        pixbuf = (GdkPixbuf *) gtk_object_get_data (GTK_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 if (evt->keyval == 'p') {
+                if (pixbuf == NULL) {
+                        fprintf (stderr, "PIXBUF NULL\n");
+                        return;
+                }
+
+                if (!gdk_pixbuf_save (pixbuf, "foo.png", "png", &err, NULL)) {
+                        fprintf (stderr, "%s", err->message);
+                        g_error_free (err);
+                }
+        }
+}
+
+
+int
+close_app (GtkWidget *widget, gpointer data)
+{
+        gtk_main_quit ();
+        return TRUE;
+}
+
+int
+expose_cb (GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
+{
+        GdkPixbuf *pixbuf;
+         
+        pixbuf = (GdkPixbuf *) gtk_object_get_data (GTK_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;
+}
+
+int
+configure_cb (GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
+{
+        GdkPixbuf *pixbuf;
+                           
+        pixbuf = (GdkPixbuf *) gtk_object_get_data (GTK_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_ROOT_PARENT ();
+                new_pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
+                                                           0, 0, 0, 0, evt->width, evt->height);
+                gtk_object_set_data (GTK_OBJECT (drawing_area), "pixbuf", new_pixbuf);
+                gdk_pixbuf_unref (pixbuf);
+        }
+
+        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_cmap ());
+
+        root = GDK_ROOT_PARENT ();
+        pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
+                                               0, 0, 0, 0, 150, 160);
+   
+        window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+        gtk_signal_connect (GTK_OBJECT (window), "delete_event",
+                            GTK_SIGNAL_FUNC (close_app), NULL);
+        gtk_signal_connect (GTK_OBJECT (window), "destroy",   
+                            GTK_SIGNAL_FUNC (close_app), NULL);
+   
+        vbox = gtk_vbox_new (FALSE, 0);
+        gtk_container_add (GTK_CONTAINER (window), vbox);  
+   
+        drawing_area = gtk_drawing_area_new ();
+        gtk_drawing_area_size (GTK_DRAWING_AREA (drawing_area),
+                               gdk_pixbuf_get_width (pixbuf),
+                               gdk_pixbuf_get_height (pixbuf));
+        gtk_signal_connect (GTK_OBJECT (drawing_area), "expose_event",
+                            GTK_SIGNAL_FUNC (expose_cb), NULL);
+
+        gtk_signal_connect (GTK_OBJECT (drawing_area), "configure_event",
+                            GTK_SIGNAL_FUNC (configure_cb), NULL);
+        gtk_signal_connect (GTK_OBJECT (window), "key_press_event", 
+                            GTK_SIGNAL_FUNC (keypress_check), drawing_area);    
+        gtk_object_set_data (GTK_OBJECT (drawing_area), "pixbuf", pixbuf);
+        gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
+   
+        gtk_widget_show_all (window);
+        gtk_main ();
+        return 0;
+}