add cairo

1 files changed, 141 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/font-matrix-translation.c b/libs/cairo-1.16.0/test/font-matrix-translation.c
new file mode 100644
index 0000000..465ac7c
--- /dev/null
+++ b/libs/cairo-1.16.0/test/font-matrix-translation.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright © 2006 Red Hat, 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
+ * Red Hat, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Red Hat, Inc. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+#define TEXT_SIZE 12
+#define PAD 4
+#define TEXT "text"
+
+static cairo_bool_t
+text_extents_equal (const cairo_text_extents_t *A,
+	            const cairo_text_extents_t *B)
+{
+    return A->x_bearing == B->x_bearing &&
+	   A->y_bearing == B->y_bearing &&
+	   A->width     == B->width     &&
+	   A->height    == B->height    &&
+	   A->x_advance == B->x_advance &&
+	   A->y_advance == B->y_advance;
+}
+
+static cairo_test_status_t
+box_text (const cairo_test_context_t *ctx, cairo_t *cr,
+	  const char *utf8,
+	  double x, double y)
+{
+    double line_width;
+    cairo_text_extents_t extents = {0}, scaled_extents = {0};
+    cairo_scaled_font_t *scaled_font;
+    cairo_status_t status;
+
+    cairo_save (cr);
+
+    cairo_text_extents (cr, utf8, &extents);
+
+    scaled_font = cairo_get_scaled_font (cr);
+    cairo_scaled_font_text_extents (scaled_font, TEXT, &scaled_extents);
+    status = cairo_scaled_font_status (scaled_font);
+    if (status)
+	return cairo_test_status_from_status (ctx, status);
+
+    if (! text_extents_equal (&extents, &scaled_extents)) {
+        cairo_test_log (ctx,
+			"Error: extents differ when they shouldn't:\n"
+			"cairo_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n"
+			"cairo_scaled_font_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n",
+		        extents.x_bearing, extents.y_bearing,
+			extents.width, extents.height,
+			extents.x_advance, extents.y_advance,
+		        scaled_extents.x_bearing, scaled_extents.y_bearing,
+			scaled_extents.width, scaled_extents.height,
+			scaled_extents.x_advance, scaled_extents.y_advance);
+        return CAIRO_TEST_FAILURE;
+    }
+
+    line_width = cairo_get_line_width (cr);
+    cairo_rectangle (cr,
+		     x + extents.x_bearing - line_width / 2,
+		     y + extents.y_bearing - line_width / 2,
+		     extents.width  + line_width,
+		     extents.height + line_width);
+    cairo_stroke (cr);
+
+    cairo_move_to (cr, x, y);
+    cairo_show_text (cr, utf8);
+
+    cairo_restore (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    const cairo_test_context_t *ctx = cairo_test_get_context (cr);
+    cairo_test_status_t status;
+    cairo_text_extents_t extents;
+    cairo_matrix_t matrix;
+
+    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+    cairo_paint (cr);
+
+    cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    cairo_set_font_size (cr, TEXT_SIZE);
+
+    cairo_translate (cr, PAD, PAD);
+    cairo_set_line_width (cr, 1.0);
+
+    cairo_text_extents (cr, TEXT, &extents);
+
+    /* Draw text and bounding box */
+    cairo_set_source_rgb (cr, 0, 0, 0); /* black */
+    status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing);
+    if (status)
+	return status;
+
+    /* Then draw again with the same coordinates, but with a font
+     * matrix to position the text below and shifted a bit to the
+     * right. */
+    cairo_matrix_init_translate (&matrix, TEXT_SIZE / 2, TEXT_SIZE + PAD);
+    cairo_matrix_scale (&matrix, TEXT_SIZE, TEXT_SIZE);
+    cairo_set_font_matrix (cr, &matrix);
+
+    cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
+    status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing);
+    if (status)
+	return status;
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (font_matrix_translation,
+	    "Test that translation in a font matrix can be used to offset a string",
+	    "font", /* keywords */
+	    NULL, /* requirements */
+	    38, 34,
+	    NULL, draw)