[test] Add a1-mask.

Add a variant of the a8-mask test case that exercises the FORMAT_A1 code
paths instead.

test/.gitignore

@@ -5,6 +5,7 @@ Makefile.in
 index.html
 ref.hash
 a1-image-sample
+a1-mask
 a1-traps-sample
 a8-mask
 big-line

test/Makefile.am

@@ -3,6 +3,7 @@ SUBDIRS=pdiff .
 # Here are all the tests that are run unconditionally
 TESTS =							\
 a1-image-sample$(EXEEXT)				\
+a1-mask$(EXEEXT)					\
 a1-traps-sample$(EXEEXT)				\
 a8-mask$(EXEEXT)					\
 big-line$(EXEEXT)					\
@@ -249,6 +250,7 @@ endif
 # All tests which have a reference image go here.
 REFERENCE_IMAGES = \
 	a1-image-sample-ref.png		\
+	a1-mask-ref.png	\
 	a1-traps-sample-ref.png		\
 	a8-mask-ref.png	\
 	big-line-ref.png		\

test/a1-mask.c

@@ -0,0 +1,198 @@
+/*
+ * Copyright © Jeff Muizelaar
+ *
+ * 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.
+ *
+ * JEFF MUIZELAAR 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.
+ *
+ * Authors: Jeff Muizelaar <jeff@infidigm.net>
+ *	    Carl Worth <cworth@cworth.org>
+ *	    Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+#define MASK_WIDTH 10
+#define MASK_HEIGHT 8
+
+#ifdef WORDS_BIGENDIAN
+#define MASK 0x28, 0x55
+#else
+#define MASK 0x14, 0xAA
+#endif
+static unsigned char mask[(MASK_WIDTH + 7) / 8 * MASK_HEIGHT] = {
+    MASK,
+    MASK,
+    MASK,
+    MASK,
+    MASK,
+    MASK,
+    MASK,
+    MASK,
+};
+
+cairo_test_t test = {
+    "a1-mask",
+    "test masks of CAIRO_FORMAT_A1",
+    MASK_WIDTH, MASK_HEIGHT,
+    draw
+};
+
+
+static cairo_test_status_t
+check_status (cairo_status_t status, cairo_status_t expected)
+{
+    if (status == expected)
+	return CAIRO_TEST_SUCCESS;
+
+    cairo_test_log ("Error: Expected status value %d (%s), received %d (%s)\n",
+		    expected,
+		    cairo_status_to_string (expected),
+		    status,
+		    cairo_status_to_string (status));
+    return CAIRO_TEST_FAILURE;
+}
+
+static cairo_test_status_t
+test_surface_with_width_and_stride (int width, int stride,
+				    cairo_status_t expected)
+{
+    cairo_test_status_t status;
+    cairo_surface_t *surface;
+    cairo_t *cr;
+    int len;
+    unsigned char *data;
+
+    cairo_test_log ("Creating surface with width %d and stride %d\n",
+		    width, stride);
+
+    len = stride;
+    if (len < 0)
+	len = -len;
+    data = xmalloc (len);
+
+    surface = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_A1,
+						   width, 1, stride);
+    cr = cairo_create (surface);
+
+    cairo_paint (cr);
+
+    status = check_status (cairo_surface_status (surface), expected);
+    if (status)
+	goto BAIL;
+
+    status = check_status (cairo_status (cr), expected);
+    if (status)
+	goto BAIL;
+
+  BAIL:
+    cairo_destroy (cr);
+    cairo_surface_destroy (surface);
+    free (data);
+    return status;
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int dst_width, int dst_height)
+{
+    int test_width, test_stride, stride, row;
+    unsigned char *src, *dst, *mask_aligned;
+    cairo_surface_t *surface;
+    cairo_pattern_t *pattern;
+    cairo_test_status_t status;
+    cairo_status_t expected;
+
+    for (test_width = 0; test_width < 40; test_width++) {
+	test_stride = (test_width + 7) / 8;
+	stride = cairo_format_stride_for_width (CAIRO_FORMAT_A1,
+						test_width);
+
+	/* First create a surface using the width as the stride, (most
+	 * of these should fail). */
+	expected = (stride == test_stride) ?
+	    CAIRO_STATUS_SUCCESS : CAIRO_STATUS_INVALID_STRIDE;
+
+	status = test_surface_with_width_and_stride (test_width,
+						     test_stride,
+						     expected);
+	if (status)
+	    return status;
+
+	status = test_surface_with_width_and_stride (test_width,
+						     -test_stride,
+						     expected);
+	if (status)
+	    return status;
+
+
+	/* Then create a surface using the correct stride, (should
+	   always succeed).*/
+	status = test_surface_with_width_and_stride (test_width,
+						     stride,
+						     CAIRO_STATUS_SUCCESS);
+	if (status)
+	    return status;
+
+	status = test_surface_with_width_and_stride (test_width,
+						     -stride,
+						     CAIRO_STATUS_SUCCESS);
+	if (status)
+	    return status;
+    }
+
+    /* Now test actually drawing through our mask data, allocating and
+     * copying with the proper stride. */
+    surface = cairo_image_surface_create (CAIRO_FORMAT_A1,
+					  MASK_WIDTH,
+					  MASK_HEIGHT);
+
+    mask_aligned = cairo_image_surface_get_data (surface);
+    if (mask_aligned != NULL) {
+	stride = cairo_image_surface_get_stride (surface);
+	src = mask;
+	dst = mask_aligned;
+	for (row = 0; row < MASK_HEIGHT; row++) {
+	    memcpy (dst, src, (MASK_WIDTH + 7) / 8);
+	    src += (MASK_WIDTH + 7) / 8;
+	    dst += stride;
+	}
+    }
+
+    /* Paint background blue */
+    cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
+    cairo_paint (cr);
+
+    /* Then paint red through our mask */
+    pattern = cairo_pattern_create_for_surface (surface);
+
+    cairo_set_source_rgb (cr, 1, 0, 0); /* red */
+    cairo_mask (cr, pattern);
+
+    cairo_pattern_destroy (pattern);
+    cairo_surface_destroy (surface);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}