Added correct resize handling

[rodin/chimara.git] / libchimara / graphics.c

diff --git a/libchimara/graphics.c b/libchimara/graphics.c
index 48b3a12dfd4d18550e61ca54855dd1838b9b16e0..f94b90c8616fa81699ad42aefd3e5b0e5e676b06 100644 (file)
--- a/libchimara/graphics.c
+++ b/libchimara/graphics.c
@@ -62,7 +62,7 @@ glk_image_get_info(glui32 image, glui32 *width, glui32 *height)
 
        /* Determine the image dimensions */
        if(!size_determined) {
-               WARNING("Cannot read image size: file data trimmed?");
+               WARNING("Cannot read image size");
                g_free(info);
                return FALSE;
        }
@@ -73,8 +73,6 @@ glk_image_get_info(glui32 image, glui32 *width, glui32 *height)
                *height =info->height;
        g_free(info);
 
-       //printf("size loaded: %d x %d\n", (int) *width, (int) *height);
-
        return TRUE;
 }
 
@@ -86,10 +84,40 @@ on_size_prepared(GdkPixbufLoader *loader, gint width, gint height, struct image_
        size_determined = TRUE;
 }
 
+/*** Called when the graphics window is resized. Resize the backing pixmap if necessary ***/
 void
-on_graphics_size_allocate(GtkWidget *widget, GtkAllocation *allocation, winid_t *win)
+on_graphics_size_allocate(GtkWidget *widget, GtkAllocation *allocation, winid_t win)
 {
-       printf("size allocated: %dx%d\n", allocation->width, allocation->height);
+       printf("allocate to: %dx%d\n", allocation->width, allocation->height);
+       GdkPixmap *oldmap;
+       gtk_image_get_pixmap( GTK_IMAGE(widget), &oldmap, NULL );
+       gint oldwidth = 0;
+       gint oldheight = 0;
+ 
+       /* Determine whether a pixmap exists with the correct size */
+       gboolean needs_resize = FALSE;
+       if(oldmap == NULL)
+               needs_resize = TRUE;
+       else {
+               gdk_drawable_get_size( GDK_DRAWABLE(oldmap), &oldwidth, &oldheight );
+               if(oldwidth != allocation->width || oldheight != allocation->height)
+                       needs_resize = TRUE;
+       }
+
+       if(needs_resize) {
+               printf("needs resize\n");
+               /* Create a new pixmap */
+               GdkPixmap *newmap = gdk_pixmap_new(widget->window, allocation->width, allocation->height, -1);
+               gdk_draw_rectangle( GDK_DRAWABLE(newmap), widget->style->white_gc, TRUE, 0, 0, allocation->width, allocation->height);
+
+               /* Copy the contents of the old pixmap */
+               if(oldmap != NULL)
+                       gdk_draw_drawable( GDK_DRAWABLE(newmap), widget->style->white_gc, GDK_DRAWABLE(oldmap), 0, 0, 0, 0, oldwidth, oldheight);
+               
+               /* Use the new pixmap */
+               gtk_image_set_from_pixmap( GTK_IMAGE(widget), newmap, NULL );
+               g_object_unref(newmap);
+       }
 }
 
 glui32
@@ -107,8 +135,6 @@ glk_image_draw(winid_t win, glui32 image, glsi32 val1, glsi32 val2) {
        guchar *buffer;
        GdkPixmap *canvas;
 
-       //printf("glk_image_get_info(%d)\n", image);
-
        /* Lookup the proper resource */
        blorb_error = giblorb_load_resource(glk_data->resource_map, giblorb_method_FilePos, &res, giblorb_ID_Pict, image);
        if(blorb_error != giblorb_err_None) {
@@ -135,6 +161,7 @@ glk_image_draw(winid_t win, glui32 image, glsi32 val1, glsi32 val2) {
 
                total_read += num_read;
        }
+       printf("Loading done\n");
        giblorb_unload_chunk(glk_data->resource_map, image);
        g_free(buffer);
 
@@ -152,11 +179,13 @@ glk_image_draw(winid_t win, glui32 image, glsi32 val1, glsi32 val2) {
                return FALSE;
        }
 
+       // TODO: FIX hang?
        gdk_draw_pixbuf( GDK_DRAWABLE(canvas), NULL, pixbuf, 0, 0, val1, val2, -1, -1, GDK_RGB_DITHER_NONE, 0, 0 );
        gdk_pixbuf_loader_close(loader, &pixbuf_error);
 
        /* Update the screen */
        gtk_widget_queue_draw(win->widget);
+
        return TRUE;
 }