From 5412343a77b7b336886ed763a3518ff4602f27aa Mon Sep 17 00:00:00 2001
From: Carl Worth <cworth@cworth.org>
Date: Thu, 5 Oct 2006 12:13:48 -0700
Subject: [PATCH] perf: Add subimage_copy test to demonstrate performance bug
 found by monty

---
 perf/Makefile.am     |  1 +
 perf/cairo-perf.c    |  1 +
 perf/cairo-perf.h    |  1 +
 perf/subimage_copy.c | 71 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 74 insertions(+)
 create mode 100644 perf/subimage_copy.c

diff --git a/perf/Makefile.am b/perf/Makefile.am
index d96fd63fa..ef6dc739d 100644
--- a/perf/Makefile.am
+++ b/perf/Makefile.am
@@ -21,6 +21,7 @@ cairo_perf_SOURCES =		\
 	fill.c			\
 	paint.c			\
 	stroke.c		\
+	subimage_copy.c		\
 	tessellate.c		\
 	text.c
 
diff --git a/perf/cairo-perf.c b/perf/cairo-perf.c
index b98382f00..5b9486998 100644
--- a/perf/cairo-perf.c
+++ b/perf/cairo-perf.c
@@ -238,5 +238,6 @@ cairo_perf_case_t perf_cases[] = {
     { stroke, 64, 256},
     { text,   64, 256},
     { tessellate, 100, 100},
+    { subimage_copy, 16, 512},
     { NULL }
 };
diff --git a/perf/cairo-perf.h b/perf/cairo-perf.h
index b2bcde8a0..cf3d33d96 100644
--- a/perf/cairo-perf.h
+++ b/perf/cairo-perf.h
@@ -85,6 +85,7 @@ cairo_perf_cover_sources_and_operators (cairo_perf_t		*perf,
 CAIRO_PERF_DECL (fill);
 CAIRO_PERF_DECL (paint);
 CAIRO_PERF_DECL (stroke);
+CAIRO_PERF_DECL (subimage_copy);
 CAIRO_PERF_DECL (tessellate);
 CAIRO_PERF_DECL (text);
 
diff --git a/perf/subimage_copy.c b/perf/subimage_copy.c
new file mode 100644
index 000000000..54f596f4f
--- /dev/null
+++ b/perf/subimage_copy.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright © 2006 Red Hat, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Red Hat, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Red Hat, Inc. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+ * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-perf.h"
+
+/* This case exposes a performance bug found by Christopher "Monty"
+ * Montgomery in that copying a tiny portion of an image surface to an
+ * X surface causes the entire image surface to be copied to an
+ * intermediate surface.
+ *
+ * If the performance bug is fixed, then the time this test takes
+ * should be independent of the source and destination surface sizes.
+ */
+
+static cairo_perf_ticks_t
+do_subimage_copy (cairo_t *cr, int width, int height)
+{
+    cairo_rectangle (cr, 2, 2, 4, 4);
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+
+    cairo_perf_timer_start ();
+
+    cairo_fill (cr);
+
+    cairo_perf_timer_stop ();
+
+    return cairo_perf_timer_elapsed ();
+}
+
+void
+subimage_copy (cairo_perf_t *perf, cairo_t *cr, int width, int height)
+{
+    cairo_surface_t *image;
+    cairo_t *cr2;
+
+    cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
+    cairo_paint (cr);
+
+    image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
+    cr2 = cairo_create (image);
+    cairo_set_source_rgb (cr2, 1, 0, 0); /* red */
+    cairo_paint (cr2);
+    cairo_destroy (cr2);
+
+    cairo_set_source_surface (cr, image, 0, 0);
+    cairo_surface_destroy (image);
+
+    cairo_perf_run (perf, "subimage_copy", do_subimage_copy);
+}