dash and pattern getter functions

Adds API functions for inspecting the current dash state, as well as
the contents of pattern objects:

  cairo_get_dash
  cairo_get_dash_count
  cairo_pattern_get_rgba
  cairo_pattern_get_surface
  cairo_pattern_get_color_stop_rgba
  cairo_pattern_get_color_stop_count
  cairo_pattern_get_linear_points
  cairo_pattern_get_radial_circles

1 files changed, 175 insertions, 0 deletions

diff --git a/test/pattern-getters.c b/test/pattern-getters.c
new file mode 100644
index 000000000..db3d3273a
--- /dev/null
+++ b/test/pattern-getters.c
@@ -0,0 +1,175 @@
+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/*
+ * Copyright © 2005 Mozilla Corporation, 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
+ * Mozilla Corporation not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Mozilla Corporation makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION 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: Vladimir Vukicevic <vladimir@pobox.com>
+ */
+
+#include <stdlib.h>
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+cairo_test_t test = {
+    "pattern-getters",
+    "Tests calls to pattern getter functions",
+    1, 1,
+    draw
+};
+
+#define CHECK_SUCCESS do { if (status) return CAIRO_TEST_FAILURE; } while (0)
+
+#define DOUBLE_EQUALS(a,b)  (fabs((a)-(b)) < 0.00001)
+
+int
+double_buf_equal (double *a, double *b, int nc)
+{
+    int i;
+    for (i = 0; i < nc; i++) {
+	if (!DOUBLE_EQUALS(a[i],b[i]))
+	    return 0;
+    }
+    return 1;
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_status_t status;
+    cairo_pattern_t *pat;
+
+    /* Test pattern_get_rgba */
+    {
+	double r, g, b, a;
+	pat = cairo_pattern_create_rgba (0.2, 0.3, 0.4, 0.5);
+
+	status = cairo_pattern_get_rgba (pat, &r, &g, &b, &a);
+	CHECK_SUCCESS;
+
+	if (!DOUBLE_EQUALS(r,0.2),
+	    !DOUBLE_EQUALS(g,0.3),
+	    !DOUBLE_EQUALS(b,0.4),
+	    !DOUBLE_EQUALS(a,0.5))
+	    return CAIRO_TEST_FAILURE;
+
+	cairo_pattern_destroy (pat);
+    }
+
+    /* Test pattern_get_surface */
+    {
+	cairo_surface_t *surf;
+
+	pat = cairo_pattern_create_for_surface (cairo_get_target (cr));
+
+	status = cairo_pattern_get_surface (pat, &surf);
+	CHECK_SUCCESS;
+
+	if (surf != cairo_get_target (cr))
+	    return CAIRO_TEST_FAILURE;
+
+	cairo_pattern_destroy (pat);
+    }
+
+    /* Test get_color_stops & linear_get_points */
+    {
+	int i;
+	double x0, y0, x1, y1;
+	double expected_values[15] = { 0.0, 0.2, 0.4, 0.2, 1.0,
+				       0.5, 0.4, 0.5, 0.2, 0.5,
+				       1.0, 0.2, 0.4, 0.5, 0.2 };
+	double new_buf[15];
+
+	pat = cairo_pattern_create_linear (1.0, 2.0, 3.0, 4.0);
+
+	for (i = 0; i < 3; i++) {
+	    cairo_pattern_add_color_stop_rgba (pat,
+					       expected_values[i*5+0],
+					       expected_values[i*5+1],
+					       expected_values[i*5+2],
+					       expected_values[i*5+3],
+					       expected_values[i*5+4]);
+	}
+
+	status = cairo_pattern_get_linear_points (pat, &x0, &y0, &x1, &y1);
+	CHECK_SUCCESS;
+
+	if (!DOUBLE_EQUALS(x0,1.0) ||
+	    !DOUBLE_EQUALS(y0,2.0) ||
+	    !DOUBLE_EQUALS(x1,3.0) ||
+	    !DOUBLE_EQUALS(y1,4.0))
+	    return CAIRO_TEST_FAILURE;
+
+	status = cairo_pattern_get_color_stop_count (pat, &i);
+	CHECK_SUCCESS;
+
+	if (i != 3)
+	    return CAIRO_TEST_FAILURE;
+
+	for (i = 0; i < 3; i++) {
+	    status = cairo_pattern_get_color_stop_rgba (pat, i,
+							&new_buf[i*5+0],
+							&new_buf[i*5+1],
+							&new_buf[i*5+2],
+							&new_buf[i*5+3],
+							&new_buf[i*5+4]);
+	    CHECK_SUCCESS;
+	}
+
+	status = cairo_pattern_get_color_stop_rgba (pat, 5, NULL, NULL, NULL, NULL, NULL);
+	if (status != CAIRO_STATUS_INVALID_INDEX)
+	    return CAIRO_TEST_FAILURE;
+
+	if (!double_buf_equal (new_buf, expected_values, sizeof(expected_values)/sizeof(double)) != 0)
+	    return CAIRO_TEST_FAILURE;
+
+	cairo_pattern_destroy (pat);
+    }
+
+    /* Test radial_get_circles */
+    {
+	double a, b, c, d, e, f;
+	pat = cairo_pattern_create_radial (1, 2, 3,
+					   4, 5, 6);
+
+	status = cairo_pattern_get_radial_circles (pat, &a, &b, &c, &d, &e, &f);
+	CHECK_SUCCESS;
+
+	if (!DOUBLE_EQUALS(a,1.0) ||
+	    !DOUBLE_EQUALS(b,2.0) ||
+	    !DOUBLE_EQUALS(c,3.0) ||
+	    !DOUBLE_EQUALS(d,4.0) ||
+	    !DOUBLE_EQUALS(e,5.0) ||
+	    !DOUBLE_EQUALS(f,6.0))
+	    return CAIRO_TEST_FAILURE;
+    }
+
+    cairo_set_source_rgb (cr, 0, 1, 0);
+    cairo_paint (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}