add cairo

1 files changed, 172 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/tighten-bounds.c b/libs/cairo-1.16.0/test/tighten-bounds.c
new file mode 100644
index 0000000..f5430e4
--- /dev/null
+++ b/libs/cairo-1.16.0/test/tighten-bounds.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright © 2011 Uli Schlachter
+ *
+ * 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: Uli Schlachter <psychon@znc.in>
+ */
+
+#include "cairo-test.h"
+
+static void path_none (cairo_t *cr, int size)
+{
+}
+
+static void path_box (cairo_t *cr, int size)
+{
+    cairo_rectangle (cr, 0, 0, size, size);
+}
+
+static void path_box_unaligned (cairo_t *cr, int size)
+{
+    cairo_rectangle (cr, 0.5, 0.5, size - 1, size - 1);
+}
+
+static void path_triangle (cairo_t *cr, int size)
+{
+    cairo_move_to (cr, 0, 0);
+    cairo_line_to (cr, size/2, size);
+    cairo_line_to (cr, size, 0);
+    cairo_close_path (cr);
+}
+
+static void path_circle (cairo_t *cr, int size)
+{
+    cairo_arc (cr, size / 2.0, size / 2.0, size / 2.0, 0, 2 * M_PI);
+}
+
+static void (* const path_funcs[])(cairo_t *cr, int size) = {
+    path_none,
+    path_box,
+    path_box_unaligned,
+    path_triangle,
+    path_circle
+};
+
+#define SIZE 20
+#define PAD 2
+#define TYPES 6
+/* All-clipped is boring, thus we skip path_none for clipping */
+#define CLIP_OFFSET 1
+#define IMAGE_WIDTH ((ARRAY_LENGTH (path_funcs) - CLIP_OFFSET) * TYPES * (SIZE + PAD) - PAD)
+#define IMAGE_HEIGHT (ARRAY_LENGTH (path_funcs) * (SIZE + PAD) - PAD)
+
+static void
+draw_idx (cairo_t *cr, int i, int j, int type)
+{
+    cairo_bool_t little_path;
+    cairo_bool_t empty_clip;
+    cairo_bool_t little_clip;
+
+    /* The lowest bit controls the path, the rest the clip */
+    little_path = type & 1;
+
+    /* We don't want the combination "empty_clip = TRUE, little_clip = FALSE"
+     * (== all clipped).
+     */
+    switch (type >> 1)
+    {
+    case 0:
+	empty_clip = FALSE;
+	little_clip = FALSE;
+	break;
+    case 1:
+	empty_clip = FALSE;
+	little_clip = TRUE;
+	break;
+    case 2:
+	empty_clip = TRUE;
+	little_clip = TRUE;
+	break;
+    default:
+	return;
+    }
+
+    cairo_save (cr);
+
+    /* Thanks to the fill rule, drawing something twice removes it again */
+    cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
+
+    path_funcs[i] (cr, SIZE);
+    if (empty_clip)
+	path_funcs[i] (cr, SIZE);
+    if (little_clip)
+    {
+	cairo_save (cr);
+	cairo_translate (cr, SIZE / 4, SIZE / 4);
+	path_funcs[i] (cr, SIZE / 2);
+	cairo_restore (cr);
+    }
+    cairo_clip (cr);
+
+    path_funcs[j] (cr, SIZE);
+    path_funcs[j] (cr, SIZE);
+    if (little_path)
+    {
+	/* Draw the object again in the center of itself */
+	cairo_save (cr);
+	cairo_translate (cr, SIZE / 4, SIZE / 4);
+	path_funcs[j] (cr, SIZE / 2);
+	cairo_restore (cr);
+    }
+    cairo_fill (cr);
+    cairo_restore (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    size_t i, j, k;
+
+    cairo_set_source_rgb (cr, 0, 1, 0);
+    cairo_paint (cr);
+
+    /* Set an unbounded operator so that we can see how accurate the bounded
+     * extents were.
+     */
+    cairo_set_operator (cr, CAIRO_OPERATOR_IN);
+    cairo_set_source_rgb (cr, 1, 1, 1);
+
+    for (j = 0; j < ARRAY_LENGTH (path_funcs); j++) {
+	cairo_save (cr);
+	for (i = CLIP_OFFSET; i < ARRAY_LENGTH (path_funcs); i++) {
+	    for (k = 0; k < TYPES; k++) {
+		cairo_save (cr);
+		cairo_rectangle (cr, 0, 0, SIZE, SIZE);
+		cairo_clip (cr);
+		draw_idx (cr, i, j, k);
+		cairo_restore (cr);
+		cairo_translate (cr, SIZE + PAD, 0);
+	    }
+	}
+	cairo_restore (cr);
+	cairo_translate (cr, 0, SIZE + PAD);
+    }
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (tighten_bounds,
+	    "Tests that we tighten the bounds after tessellation.",
+	    "fill", /* keywords */
+	    NULL, /* requirements */
+	    IMAGE_WIDTH, IMAGE_HEIGHT,
+	    NULL, draw)