[Pixman] [PATCH 3/5] test: Add radial-perf-test, a microbenchmark for radial gradients

[Søren Sandmann]

From: Søren Sandmann Pedersen <ssp at redhat.com>

This benchmark renders one of the radial gradients used in the
swfdec-youtube cairo trace 500 times and reports the average time it
took.
---
 test/Makefile.sources   |    3 +-
 test/radial-perf-test.c |   58 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 1 deletions(-)
 create mode 100644 test/radial-perf-test.c

diff --git a/test/Makefile.sources b/test/Makefile.sources
index 5b30970..b5fc740 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -28,9 +28,10 @@ TESTPROGRAMS =			\
 	composite		\
 	$(NULL)
 
-# Benchmarks
+# Other programs
 OTHERPROGRAMS =                 \
 	lowlevel-blt-bench	\
+	radial-perf-test	\
         check-formats           \
 	$(NULL)
 
diff --git a/test/radial-perf-test.c b/test/radial-perf-test.c
new file mode 100644
index 0000000..71092e2
--- /dev/null
+++ b/test/radial-perf-test.c
@@ -0,0 +1,58 @@
+#include "utils.h"
+#include <stdio.h>
+
+int
+main ()
+{
+    static const pixman_point_fixed_t inner = { 0x0000, 0x0000 };
+    static const pixman_point_fixed_t outer = { 0x0000, 0x0000 };
+    static const pixman_fixed_t r_inner = 0;
+    static const pixman_fixed_t r_outer = 64 << 16;
+    static const pixman_gradient_stop_t stops[] = {
+	{ 0x00000, { 0x6666, 0x6666, 0x6666, 0xffff } },
+	{ 0x10000, { 0x0000, 0x0000, 0x0000, 0xffff } }
+    };
+    static const pixman_transform_t transform = {
+	{ { 0x0,        0x26ee, 0x0}, 
+	  { 0xffffeeef, 0x0,    0x0}, 
+	  { 0x0,        0x0,    0x10000}
+	}
+    };
+    static const pixman_color_t z = { 0x0000, 0x0000, 0x0000, 0x0000 };
+    pixman_image_t *dest, *radial, *zero;
+    int i;
+    double before, after;
+
+    dest = pixman_image_create_bits (
+	PIXMAN_x8r8g8b8, 640, 429, NULL, -1);
+    zero = pixman_image_create_solid_fill (&z);
+    radial = pixman_image_create_radial_gradient (
+	&inner, &outer, r_inner, r_outer, stops, ARRAY_LENGTH (stops));
+    pixman_image_set_transform (radial, &transform);
+    pixman_image_set_repeat (radial, PIXMAN_REPEAT_PAD);
+
+#define N_COMPOSITE	500
+
+    before = gettime();
+    for (i = 0; i < N_COMPOSITE; ++i)
+    {
+	before -= gettime();
+
+	pixman_image_composite (
+	    PIXMAN_OP_SRC, zero, NULL, dest,
+	    0, 0, 0, 0, 0, 0, 640, 429);
+
+	before += gettime();
+
+	pixman_image_composite32 (
+	    PIXMAN_OP_OVER, radial, NULL, dest,
+	    - 150, -158, 0, 0, 0, 0, 640, 361);
+    }
+
+    after = gettime();
+
+    write_png (dest, "radial.png");
+
+    printf ("Average time to composite: %f\n", (after - before) / N_COMPOSITE);
+    return 0;
+}
-- 
1.7.4