[gtk+] Add performance test for gtkcairoblur

[Alexander Larsson <alexl src gnome org>]

commit 9ba185b749542618bc2843517d49dc05ed006164
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Mar 19 16:24:19 2015 +0100

    Add performance test for gtkcairoblur
    
    This just creates a large cairo surface and times bluring it
    at various values of radius.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=746468

 tests/Makefile.am        |    6 +++++
 tests/blur-performance.c |   54 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index c94448c..c3bda57 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -34,6 +34,7 @@ noinst_PROGRAMS =  $(TEST_PROGS)      \
        animated-revealing              \
        motion-compression              \
        scrolling-performance           \
+       blur-performance                \
        simple                          \
        flicker                         \
        print-editor                    \
@@ -187,6 +188,7 @@ animated_revealing_DEPENDENCIES = $(TEST_DEPS)
 flicker_DEPENDENCIES = $(TEST_DEPS)
 motion_compression_DEPENDENCIES = $(TEST_DEPS)
 scrolling_performance_DEPENDENCIES = $(TEST_DEPS)
+blur_performance_DEPENDENCIES = $(TEST_DEPS)
 simple_DEPENDENCIES = $(TEST_DEPS)
 print_editor_DEPENDENCIES = $(TEST_DEPS)
 video_timer_DEPENDENCIES = $(TEST_DEPS)
@@ -318,6 +320,10 @@ scrolling_performance_SOURCES = \
        variable.c              \
        variable.h
 
+blur_performance_SOURCES = \
+       blur-performance.c      \
+       ../gtk/gtkcairoblur.c
+
 video_timer_SOURCES =  \
        video-timer.c   \
        variable.c      \
diff --git a/tests/blur-performance.c b/tests/blur-performance.c
new file mode 100644
index 0000000..c4381f9
--- /dev/null
+++ b/tests/blur-performance.c
@@ -0,0 +1,54 @@
+/* -*- mode: C; c-basic-offset: 2; indent-tabs-mode: nil; -*- */
+
+#include <gtk/gtkcairoblurprivate.h>
+
+static void
+init_surface (cairo_t *cr)
+{
+  int w = cairo_image_surface_get_width (cairo_get_target (cr));
+  int h = cairo_image_surface_get_height (cairo_get_target (cr));
+
+  cairo_set_source_rgb (cr, 0, 0, 0);
+  cairo_fill (cr);
+
+  cairo_set_source_rgb (cr, 1, 1, 1);
+  cairo_arc (cr, w/2, h/2, w/2, 0, 2*G_PI);
+  cairo_fill (cr);
+}
+
+int
+main (int argc, char **argv)
+{
+  cairo_surface_t *surface;
+  cairo_t *cr;
+  GTimer *timer;
+  double msec;
+  int i, j;
+  int size;
+
+  timer = g_timer_new ();
+
+  size = 2000;
+
+  surface = cairo_image_surface_create (CAIRO_FORMAT_A8, size, size);
+
+  cr = cairo_create (surface);
+
+  /* We do everything three times, first two as warmup */
+  for (j = 0; j < 2; j++)
+    {
+      for (i = 1; i < 16; i++)
+       {
+         init_surface (cr);
+         g_timer_start (timer);
+         _gtk_cairo_blur_surface (surface, i);
+         msec = g_timer_elapsed (timer, NULL) * 1000;
+         if (j == 1)
+           g_print ("Radius %2d: %.2f msec, %.2f kpixels/msec:\n", i, msec, size*size/(msec*1000));
+       }
+    }
+
+  g_timer_destroy (timer);
+
+  return 0;
+}