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-rw-r--r--test/a8-mask.c201
1 files changed, 201 insertions, 0 deletions
diff --git a/test/a8-mask.c b/test/a8-mask.c
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--- /dev/null
+++ b/test/a8-mask.c
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+/*
+ * 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>
+ */
+
+#include "cairo-test.h"
+
+#define MASK_WIDTH 8
+#define MASK_HEIGHT 8
+
+static unsigned char mask[MASK_WIDTH * MASK_HEIGHT] = {
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0,
+};
+
+static cairo_test_status_t
+check_status (const cairo_test_context_t *ctx,
+ cairo_status_t status,
+ cairo_status_t expected)
+{
+ if (status == expected)
+ return CAIRO_TEST_SUCCESS;
+
+ cairo_test_log (ctx,
+ "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 (const cairo_test_context_t *ctx,
+ 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 (ctx,
+ "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_A8,
+ width, 1, stride);
+ cr = cairo_create (surface);
+
+ cairo_paint (cr);
+
+ status = check_status (ctx, cairo_surface_status (surface), expected);
+ if (status)
+ goto BAIL;
+
+ status = check_status (ctx, 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 stride, row;
+ unsigned char *src, *dst, *mask_aligned;
+ cairo_surface_t *surface;
+
+ /* Now test actually drawing through our mask data, allocating and
+ * copying with the proper stride. */
+ stride = cairo_format_stride_for_width (CAIRO_FORMAT_A8,
+ MASK_WIDTH);
+
+ mask_aligned = xmalloc (stride * MASK_HEIGHT);
+
+ src = mask;
+ dst = mask_aligned;
+ for (row = 0; row < MASK_HEIGHT; row++) {
+ memcpy (dst, src, MASK_WIDTH);
+ src += MASK_WIDTH;
+ dst += stride;
+ }
+
+ surface = cairo_image_surface_create_for_data (mask_aligned,
+ CAIRO_FORMAT_A8,
+ MASK_WIDTH,
+ MASK_HEIGHT,
+ stride);
+
+ /* Paint background blue */
+ cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
+ cairo_paint (cr);
+
+ /* Then paint red through our mask */
+ cairo_set_source_rgb (cr, 1, 0, 0); /* red */
+ cairo_mask_surface (cr, surface, 0, 0);
+ cairo_surface_destroy (surface);
+
+ free (mask_aligned);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+static cairo_test_status_t
+preamble (cairo_test_context_t *ctx)
+{
+ cairo_test_status_t status = CAIRO_TEST_SUCCESS;
+ int test_width;
+
+ for (test_width = 0; test_width < 40; test_width++) {
+ int stride = cairo_format_stride_for_width (CAIRO_FORMAT_A8,
+ test_width);
+ cairo_status_t expected;
+
+ /* First create a surface using the width as the stride,
+ * (most of these should fail).
+ */
+ expected = (stride == test_width) ?
+ CAIRO_STATUS_SUCCESS : CAIRO_STATUS_INVALID_STRIDE;
+
+ status = test_surface_with_width_and_stride (ctx,
+ test_width,
+ test_width,
+ expected);
+ if (status)
+ return status;
+
+ status = test_surface_with_width_and_stride (ctx,
+ test_width,
+ -test_width,
+ expected);
+ if (status)
+ return status;
+
+
+ /* Then create a surface using the correct stride,
+ * (should always succeed).
+ */
+ status = test_surface_with_width_and_stride (ctx,
+ test_width,
+ stride,
+ CAIRO_STATUS_SUCCESS);
+ if (status)
+ return status;
+
+ status = test_surface_with_width_and_stride (ctx,
+ test_width,
+ -stride,
+ CAIRO_STATUS_SUCCESS);
+ if (status)
+ return status;
+ }
+
+ return status;
+}
+
+CAIRO_TEST (a8_mask,
+ "test masks of CAIRO_FORMAT_A8",
+ "alpha, mask", /* keywords */
+ NULL, /* requirements */
+ 8, 8,
+ preamble, draw)