From deb09d769ae4fc55cde595c170f417692284b3e8 Mon Sep 17 00:00:00 2001
From: =?utf8?q?S=C3=B8ren=20Sandmann=20Pedersen?= <sandmann@redhat.com>
Date: Tue, 19 Jun 2007 12:41:21 -0400
Subject: [PATCH] Add a cache of images to reduce malloc/free time

---
 pixman/pixman-image.c   | 31 +++++++++++++++++++++++++++++--
 pixman/pixman-private.h |  1 +
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/pixman/pixman-image.c b/pixman/pixman-image.c
index 2bc3ef6..bd50705 100644
--- a/pixman/pixman-image.c
+++ b/pixman/pixman-image.c
@@ -69,10 +69,37 @@ color_to_uint32 (const pixman_color_t *color)
 	(color->blue >> 8);
 }
 
+static pixman_image_t *image_cache;
+
+static pixman_image_t *
+new_image (void)
+{
+    pixman_image_t *image;
+
+    if (image_cache)
+    {
+	image = image_cache;
+	image_cache = image->next;
+    }
+    else
+    {
+	image = malloc (sizeof (pixman_image_t));
+    }
+
+    return image;
+}
+
+static void
+delete_image (pixman_image_t *image)
+{
+    image->next = image_cache;
+    image_cache = image;
+}
+
 static pixman_image_t *
 allocate_image (void)
 {
-    pixman_image_t *image = malloc (sizeof (pixman_image_t));
+    pixman_image_t *image = new_image();
     
     if (image)
     {
@@ -145,7 +172,7 @@ pixman_image_unref (pixman_image_t *image)
 	if (image->type == BITS && image->bits.free_me)
 	    free (image->bits.free_me);
 	
-	free (image);
+	delete_image (image);
     }
 }
 
diff --git a/pixman/pixman-private.h b/pixman/pixman-private.h
index 9b89dee..d10d7ad 100644
--- a/pixman/pixman-private.h
+++ b/pixman/pixman-private.h
@@ -260,6 +260,7 @@ union pixman_image
     conical_gradient_t		conical;
     radial_gradient_t		radial;
     solid_fill_t		solid;
+    pixman_image_t             *next;	/* Used in the image cache */
 };
 
 #define LOG2_BITMAP_PAD 5
-- 
2.7.4