add cairo

1 files changed, 232 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/random-clips.c b/libs/cairo-1.16.0/test/random-clips.c
new file mode 100644
index 0000000..31d7d6d
--- /dev/null
+++ b/libs/cairo-1.16.0/test/random-clips.c
@@ -0,0 +1,232 @@
+/*
+ * Copyright © 2006 M Joonas Pihlaja
+ * Copyright © 2011 Chris Wilson
+ *
+ * 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.
+ *
+ * Authors:
+ *   M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
+ *   Chris Wilson <chris@chris-wilson.co.uk>
+ */
+#include "cairo-test.h"
+
+#define SIZE 512
+#define STEP (512+2)
+#define NUM_SEGMENTS 128
+
+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 void nz_path (cairo_t *cr)
+{
+    int i;
+
+    state = 0xc0ffee;
+
+    cairo_move_to (cr, 0, 0);
+    for (i = 0; i < NUM_SEGMENTS; i++) {
+	double x = uniform_random (0, SIZE);
+	double y = uniform_random (0, SIZE);
+	cairo_line_to (cr, x, y);
+    }
+    cairo_close_path (cr);
+}
+
+static void region_path (cairo_t *cr)
+{
+    int i;
+
+    state = 0xc0ffee;
+
+    for (i = 0; i < NUM_SEGMENTS; i++) {
+	int x = uniform_random (0, SIZE);
+	int y = uniform_random (0, SIZE);
+	int w = uniform_random (0, 40);
+	int h = uniform_random (0, 40);
+	cairo_rectangle (cr, x, y, w, h);
+    }
+}
+
+static void rectangle_path (cairo_t *cr)
+{
+    int i;
+
+    state = 0xc0ffee;
+
+    for (i = 0; i < NUM_SEGMENTS; i++) {
+	double x = uniform_random (0, SIZE);
+	double y = uniform_random (0, SIZE);
+	double w = uniform_random (0, 40);
+	double h = uniform_random (0, 40);
+	cairo_rectangle (cr, x, y, w, h);
+    }
+}
+
+static void arc_path (cairo_t *cr)
+{
+    int i;
+
+    state = 0xc0ffee;
+
+    for (i = 0; i < NUM_SEGMENTS; i++) {
+	double x = uniform_random (0, SIZE);
+	double y = uniform_random (0, SIZE);
+	double r = uniform_random (0, 20);
+	cairo_new_sub_path (cr);
+	cairo_arc (cr, x, y, r, 0, 2*M_PI);
+    }
+}
+
+
+static void nz_fill_stroke (cairo_t *cr)
+{
+    nz_path (cr);
+
+    cairo_set_source_rgb (cr, 1, 0, 0);
+    cairo_fill_preserve (cr);
+    cairo_set_source_rgb (cr, 0, 1, 0);
+    cairo_set_line_width (cr, 1.0);
+    cairo_stroke (cr);
+}
+
+static void clip_to_quadrant (cairo_t *cr)
+{
+    cairo_rectangle (cr, 0, 0, SIZE, SIZE);
+    cairo_clip (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_set_source_rgb (cr, 0, 0, 0);
+    cairo_paint (cr);
+
+    cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
+
+    state = 0xc0ffee;
+    cairo_translate (cr, 1, 1);
+
+    /* no clipping */
+    cairo_save (cr); {
+	clip_to_quadrant (cr);
+
+	nz_fill_stroke (cr);
+    } cairo_restore (cr);
+
+    cairo_translate (cr, STEP, 0);
+
+    /* random clipping */
+    cairo_save (cr); {
+	clip_to_quadrant (cr);
+
+	nz_path (cr);
+	cairo_clip (cr);
+
+	nz_fill_stroke (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
+	cairo_paint (cr);
+    } cairo_restore (cr);
+
+    cairo_translate (cr, STEP, 0);
+
+    /* regional clipping */
+    cairo_save (cr); {
+	clip_to_quadrant (cr);
+
+	region_path (cr);
+	cairo_clip (cr);
+
+	nz_fill_stroke (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
+	cairo_paint (cr);
+    } cairo_restore (cr);
+
+    cairo_translate (cr, -2*STEP, STEP);
+
+    /* rectangular clipping */
+    cairo_save (cr); {
+	clip_to_quadrant (cr);
+
+	rectangle_path (cr);
+	cairo_clip (cr);
+
+	nz_fill_stroke (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
+	cairo_paint (cr);
+    } cairo_restore (cr);
+
+    cairo_translate (cr, STEP, 0);
+
+    /* circular clipping */
+    cairo_save (cr); {
+	clip_to_quadrant (cr);
+
+	arc_path (cr);
+	cairo_clip (cr);
+
+	nz_fill_stroke (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
+	cairo_paint (cr);
+    } cairo_restore (cr);
+
+    cairo_translate (cr, STEP, 0);
+
+    /* all-of-the-above clipping */
+    cairo_save (cr); {
+	clip_to_quadrant (cr);
+
+	nz_path (cr);
+	cairo_clip (cr);
+	region_path (cr);
+	cairo_clip (cr);
+	rectangle_path (cr);
+	cairo_clip (cr);
+	arc_path (cr);
+	cairo_clip (cr);
+
+	nz_fill_stroke (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
+	cairo_paint (cr);
+    } cairo_restore (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (random_clip,
+	    "Tests the clip generation and intersection computation",
+	    "trap, clip", /* keywords */
+	    NULL, /* requirements */
+	    3*STEP+2, 2*STEP+2,
+	    NULL, draw)