perf: add curve

Time how long it takes to stroke and fill a single Bezier curve.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

perf/cairo-perf-micro.c

@@ -544,6 +544,7 @@ const cairo_perf_case_t perf_cases[] = {
     { text,   64, 512},
     { glyphs, 64, 512},
     { mask,   64, 512},
+    { curve,  64, 512},
     { disjoint,   64, 512},
     { hatching,   64, 512},
     { tessellate, 100, 100},

perf/cairo-perf.h

@@ -214,5 +214,6 @@ CAIRO_PERF_DECL (wave);
 CAIRO_PERF_DECL (many_strokes);
 CAIRO_PERF_DECL (many_fills);
 CAIRO_PERF_DECL (many_curves);
+CAIRO_PERF_DECL (curve);
 
 #endif

perf/micro/Makefile.sources

@@ -31,6 +31,7 @@ libcairo_perf_micro_sources = \
 	many-strokes.c		\
 	many-fills.c		\
 	many-curves.c		\
+	curve.c			\
 	spiral.c		\
 	$(NULL)
 

perf/micro/curve.c

@@ -0,0 +1,108 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-perf.h"
+
+static uint32_t state;
+
+static double
+uniform_random (double minval, double maxval)
+{
+    static uint32_t const poly = 0x9a795537U;
+    uint32_t n = 32;
+    while (n-->0)
+	state = 2*state < state ? (2*state ^ poly) : 2*state;
+    return minval + state * (maxval - minval) / 4294967296.0;
+}
+
+static cairo_perf_ticks_t
+do_curve_stroke (cairo_t *cr, int width, int height, int loops)
+{
+    state = 0xc0ffee;
+    cairo_set_line_width (cr, 2.);
+    cairo_perf_timer_start ();
+
+    while (loops--) {
+	double x1 = uniform_random (0, width);
+	double x2 = uniform_random (0, width);
+	double x3 = uniform_random (0, width);
+	double y1 = uniform_random (0, height);
+	double y2 = uniform_random (0, height);
+	double y3 = uniform_random (0, height);
+	cairo_move_to (cr, uniform_random (0, width), uniform_random (0, height));
+	cairo_curve_to (cr, x1, y1, x2, y2, x3, y3);
+	cairo_stroke(cr);
+    }
+
+    cairo_perf_timer_stop ();
+
+    return cairo_perf_timer_elapsed ();
+}
+
+static cairo_perf_ticks_t
+do_curve_fill (cairo_t *cr, int width, int height, int loops)
+{
+    state = 0xc0ffee;
+    cairo_perf_timer_start ();
+
+    while (loops--) {
+	double x0 = uniform_random (0, width);
+	double x1 = uniform_random (0, width);
+	double x2 = uniform_random (0, width);
+	double x3 = uniform_random (0, width);
+	double xm = uniform_random (0, width);
+	double xn = uniform_random (0, width);
+	double y0 = uniform_random (0, height);
+	double y1 = uniform_random (0, height);
+	double y2 = uniform_random (0, height);
+	double y3 = uniform_random (0, height);
+	double ym = uniform_random (0, height);
+	double yn = uniform_random (0, height);
+
+	cairo_move_to (cr, xm, ym);
+	cairo_curve_to (cr, x1, y1, x2, y2, xn, yn);
+	cairo_curve_to (cr, x3, y3, x0, y0, xm, ym);
+	cairo_close_path (cr);
+
+	cairo_fill(cr);
+    }
+
+    cairo_perf_timer_stop ();
+
+    return cairo_perf_timer_elapsed ();
+}
+
+void
+curve (cairo_perf_t *perf, cairo_t *cr, int width, int height)
+{
+    if (! cairo_perf_can_run (perf, "curve", NULL))
+	return;
+
+    cairo_set_source_rgb (cr, 1., 1., 1.);
+
+    cairo_perf_run (perf, "curve-stroked", do_curve_stroke, NULL);
+    cairo_perf_run (perf, "curve-filled", do_curve_fill, NULL);
+}