From 25e88a114aa7fc48f5847b09a5f82042c17950c9 Mon Sep 17 00:00:00 2001
From: Lingzhu Xiang <lingzhu@lingzhuxiang.com>
Date: Tue, 28 Oct 2014 03:48:28 -0400
Subject: [PATCH] Penalize large render jobs during zooming

All but the last jobs during zooming are aborted, so let smaller
jobs go faster.
---
 page-widget.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/page-widget.c b/page-widget.c
index 6339269..2365252 100644
--- a/page-widget.c
+++ b/page-widget.c
@@ -458,7 +458,10 @@ zathura_page_widget_draw(GtkWidget* widget, cairo_t* cairo)
       cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
       cairo_paint(cairo);
       cairo_restore(cairo);
-      zathura_render_request(priv->render_request, g_get_real_time());
+      /* All but the last jobs requested here are aborted during zooming.
+       * Processing and aborting smaller jobs first improves responsiveness. */
+      const gint64 penalty = pwidth * pheight;
+      zathura_render_request(priv->render_request, g_get_real_time() + penalty);
       return FALSE;
     }