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authorChris Wilson <chris@chris-wilson.co.uk>2009-07-27 10:06:34 +0100
committerChris Wilson <chris@chris-wilson.co.uk>2009-07-27 10:19:03 +0100
commit6ca3720ba66f443e70c961f7d4fdac604c831e97 (patch)
tree8b8b8f7a38040ee99e6e2ace5c1b0b2dd237e9dc /test
parent09a2b2ed3189fe12483cbd673c24ceddc2c20f3f (diff)
[test] Overlapping glyphs
Add a test case to explicitly check handling of overlapping glyphs.
Diffstat (limited to 'test')
-rw-r--r--test/Makefile.am4
-rw-r--r--test/Makefile.sources1
-rw-r--r--test/overlapping-glyphs.argb32.ref.pngbin0 -> 2696 bytes
-rw-r--r--test/overlapping-glyphs.c123
-rw-r--r--test/overlapping-glyphs.pdf.argb32.xfail.pngbin0 -> 2199 bytes
-rw-r--r--test/overlapping-glyphs.pdf.rgb24.xfail.pngbin0 -> 1692 bytes
-rw-r--r--test/overlapping-glyphs.rgb24.ref.pngbin0 -> 1650 bytes
7 files changed, 128 insertions, 0 deletions
diff --git a/test/Makefile.am b/test/Makefile.am
index ec5dfac90..b79428344 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -679,6 +679,10 @@ REFERENCE_IMAGES = \
over-between-source.svg12.rgb24.xfail.png \
over-between-source.xlib.ref.png \
over-between-source.xlib.rgb24.ref.png \
+ overlapping-glyphs.argb32.ref.png \
+ overlapping-glyphs.rgb24.ref.png \
+ overlapping-glyphs.pdf.argb32.xfail.png \
+ overlapping-glyphs.pdf.rgb24.xfail.png \
paint-repeat.ref.png \
paint-source-alpha.ref.png \
paint-source-alpha.svg.ref.png \
diff --git a/test/Makefile.sources b/test/Makefile.sources
index 573ca848a..0e7e48781 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -131,6 +131,7 @@ test_sources = \
over-around-source.c \
over-below-source.c \
over-between-source.c \
+ overlapping-glyphs.c \
paint.c \
paint-repeat.c \
paint-source-alpha.c \
diff --git a/test/overlapping-glyphs.argb32.ref.png b/test/overlapping-glyphs.argb32.ref.png
new file mode 100644
index 000000000..2e2d60c00
--- /dev/null
+++ b/test/overlapping-glyphs.argb32.ref.png
Binary files differ
diff --git a/test/overlapping-glyphs.c b/test/overlapping-glyphs.c
new file mode 100644
index 000000000..690a6dd25
--- /dev/null
+++ b/test/overlapping-glyphs.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright © 2009 Chris Wilson
+ *
+ * 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
+ * Chris Wilson not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Chris Wilson makes no representations about the
+ * suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+#include <assert.h>
+
+#define TEXT_SIZE 12
+#define HEIGHT (TEXT_SIZE + 4)
+#define WIDTH 50
+
+#define MAX_GLYPHS 80
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+ cairo_glyph_t glyphs_stack[MAX_GLYPHS], *glyphs;
+ const char *cairo = "Cairo";
+ const char *giza = "Giza";
+ cairo_text_extents_t cairo_extents;
+ cairo_text_extents_t giza_extents;
+ int count, num_glyphs;
+ double x0, y0;
+
+ /* We draw in the default black, so paint white first. */
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+ cairo_paint (cr);
+
+ cairo_select_font_face (cr, "Bitstream Vera Sans",
+ CAIRO_FONT_SLANT_NORMAL,
+ CAIRO_FONT_WEIGHT_NORMAL);
+ cairo_set_font_size (cr, TEXT_SIZE);
+
+ /* We want to overlap two strings, so compute overlapping glyphs. */
+
+ cairo_text_extents (cr, cairo, &cairo_extents);
+ cairo_text_extents (cr, giza, &giza_extents);
+
+ x0 = WIDTH/2. - (cairo_extents.width/2. + cairo_extents.x_bearing);
+ y0 = HEIGHT/2. - (cairo_extents.height/2. + cairo_extents.y_bearing);
+ glyphs = glyphs_stack;
+ count = MAX_GLYPHS;
+ cairo_scaled_font_text_to_glyphs (cairo_get_scaled_font (cr),
+ x0, y0,
+ cairo, strlen (cairo),
+ &glyphs, &count,
+ NULL, NULL,
+ NULL);
+ assert (glyphs == glyphs_stack);
+ num_glyphs = count;
+
+ x0 = WIDTH/2. - (giza_extents.width/2. + giza_extents.x_bearing);
+ y0 = HEIGHT/2. - (giza_extents.height/2. + giza_extents.y_bearing);
+ glyphs = glyphs_stack + count;
+ count = MAX_GLYPHS - count;
+ cairo_scaled_font_text_to_glyphs (cairo_get_scaled_font (cr),
+ x0, y0,
+ giza, strlen (giza),
+ &glyphs, &count,
+ NULL, NULL,
+ NULL);
+ assert (glyphs == glyphs_stack + num_glyphs);
+ glyphs = glyphs_stack;
+ num_glyphs += count;
+
+ cairo_set_source_rgba (cr, 0, 0, 0, .5); /* translucent black, gray! */
+ cairo_show_glyphs (cr, glyphs, num_glyphs);
+
+ /* and compare with filling */
+ cairo_translate (cr, 0, HEIGHT);
+ cairo_glyph_path (cr, glyphs, num_glyphs);
+ cairo_fill (cr);
+
+ /* switch to using an unbounded operator for added complexity */
+ cairo_set_operator (cr, CAIRO_OPERATOR_IN);
+
+ cairo_translate (cr, WIDTH, -HEIGHT);
+ cairo_save (cr);
+ cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
+ cairo_clip (cr);
+ cairo_show_glyphs (cr, glyphs, num_glyphs);
+ cairo_restore (cr);
+
+ cairo_translate (cr, 0, HEIGHT);
+ cairo_save (cr);
+ cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
+ cairo_clip (cr);
+ cairo_glyph_path (cr, glyphs, num_glyphs);
+ cairo_fill (cr);
+ cairo_restore (cr);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (overlapping_glyphs,
+ "Test handing of overlapping glyphs",
+ "text, glyphs", /* keywords */
+ NULL, /* requirements */
+ 2 * WIDTH, 2 * HEIGHT,
+ NULL, draw)
+
diff --git a/test/overlapping-glyphs.pdf.argb32.xfail.png b/test/overlapping-glyphs.pdf.argb32.xfail.png
new file mode 100644
index 000000000..e3e433727
--- /dev/null
+++ b/test/overlapping-glyphs.pdf.argb32.xfail.png
Binary files differ
diff --git a/test/overlapping-glyphs.pdf.rgb24.xfail.png b/test/overlapping-glyphs.pdf.rgb24.xfail.png
new file mode 100644
index 000000000..a3f1d7047
--- /dev/null
+++ b/test/overlapping-glyphs.pdf.rgb24.xfail.png
Binary files differ
diff --git a/test/overlapping-glyphs.rgb24.ref.png b/test/overlapping-glyphs.rgb24.ref.png
new file mode 100644
index 000000000..d97813836
--- /dev/null
+++ b/test/overlapping-glyphs.rgb24.ref.png
Binary files differ