add cairo

1 files changed, 135 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/mesh-pattern-conical.c b/libs/cairo-1.16.0/test/mesh-pattern-conical.c
new file mode 100644
index 0000000..4e87eec
--- /dev/null
+++ b/libs/cairo-1.16.0/test/mesh-pattern-conical.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright © 2009 Adrian Johnson
+ *
+ * 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: Adrian Johnson <ajohnson@redneon.com>
+ */
+
+#include "cairo-test.h"
+#include <math.h>
+
+#define PAT_WIDTH  100
+#define PAT_HEIGHT 100
+#define SIZE PAT_WIDTH
+#define PAD 2
+#define WIDTH (PAD + SIZE + PAD)
+#define HEIGHT WIDTH
+
+
+/*
+ * This test is designed to paint a mesh pattern which contains 8
+ * circular sectors approximating a conical gradient.
+ */
+
+#define CENTER_X 50
+#define CENTER_Y 50
+#define RADIUS   50
+
+static void
+sector_patch (cairo_pattern_t *pattern,
+	      double angle_A,
+	      double A_r, double A_g, double A_b,
+	      double angle_B,
+	      double B_r, double B_g, double B_b)
+{
+    double r_sin_A, r_cos_A;
+    double r_sin_B, r_cos_B;
+    double h;
+
+    r_sin_A = RADIUS * sin (angle_A);
+    r_cos_A = RADIUS * cos (angle_A);
+    r_sin_B = RADIUS * sin (angle_B);
+    r_cos_B = RADIUS * cos (angle_B);
+
+    h = 4.0/3.0 * tan ((angle_B - angle_A) / 4.0);
+
+    cairo_mesh_pattern_begin_patch (pattern);
+
+    cairo_mesh_pattern_move_to (pattern, CENTER_X, CENTER_Y);
+    cairo_mesh_pattern_line_to (pattern,
+				CENTER_X + r_cos_A,
+				CENTER_Y + r_sin_A);
+
+    cairo_mesh_pattern_curve_to (pattern,
+				 CENTER_X + r_cos_A - h * r_sin_A,
+				 CENTER_Y + r_sin_A + h * r_cos_A,
+				 CENTER_X + r_cos_B + h * r_sin_B,
+				 CENTER_Y + r_sin_B - h * r_cos_B,
+				 CENTER_X + r_cos_B,
+				 CENTER_Y + r_sin_B);
+
+    cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 1, 1);
+    cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, A_r, A_g, A_b);
+    cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, B_r, B_g, B_b);
+
+    cairo_mesh_pattern_end_patch (pattern);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_pattern_t *pattern;
+
+    cairo_set_source_rgb (cr, 1, 1, 1);
+    cairo_paint (cr);
+
+    cairo_translate (cr, PAD, PAD);
+
+    pattern = cairo_pattern_create_mesh ();
+    sector_patch (pattern,
+		  0,         1, 0, 0,
+		  M_PI/4,    1, 1, 0);
+    sector_patch (pattern,
+		  M_PI/4,    0, 1, 0,
+		  M_PI/2,    0, 1, 1);
+    sector_patch (pattern,
+		  M_PI/2,    0, 0, 1,
+		  3*M_PI/4,  1, 0, 1);
+    sector_patch (pattern,
+		  3*M_PI/4,  1, 0, 0,
+		  M_PI,      1, 1, 0);
+    sector_patch (pattern,
+		  -M_PI,     1, 1, 0,
+		  -3*M_PI/4, 0, 1, 0);
+    sector_patch (pattern,
+		  -3*M_PI/4, 0, 1, 0,
+		  -M_PI/2,   0, 1, 1);
+    sector_patch (pattern,
+		  -M_PI/2,   0, 1, 1,
+		  -M_PI/4,   0, 0, 1);
+    sector_patch (pattern,
+		  -M_PI/4,   0, 0, 1,
+		  0,         1, 0, 0);
+
+    cairo_set_source (cr, pattern);
+    cairo_paint (cr);
+    cairo_pattern_destroy (pattern);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (mesh_pattern_conical,
+	    "Paint a conical pattern using a mesh pattern",
+	    "conical, mesh, pattern", /* keywords */
+	    NULL, /* requirements */
+	    WIDTH, HEIGHT,
+	    NULL, draw)