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-rw-r--r--test/paint-with-alpha.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/test/paint-with-alpha.c b/test/paint-with-alpha.c
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--- /dev/null
+++ b/test/paint-with-alpha.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright © 2005 Red Hat, Inc.
+ * 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"
+
+static uint32_t data[16] = {
+ 0xffffffff, 0xffffffff, 0xffff0000, 0xffff0000,
+ 0xffffffff, 0xffffffff, 0xffff0000, 0xffff0000,
+
+ 0xff00ff00, 0xff00ff00, 0xff0000ff, 0xff0000ff,
+ 0xff00ff00, 0xff00ff00, 0xff0000ff, 0xff0000ff
+};
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+ cairo_surface_t *surface;
+
+ surface = cairo_image_surface_create_for_data ((unsigned char *) data,
+ CAIRO_FORMAT_RGB24, 4, 4, 16);
+
+ cairo_test_paint_checkered (cr);
+
+ cairo_scale (cr, 4, 4);
+
+ cairo_set_source_surface (cr, surface, 2 , 2);
+ cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
+ cairo_paint_with_alpha (cr, 0.5);
+
+ cairo_surface_finish (surface); /* data will go out of scope */
+ cairo_surface_destroy (surface);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+static cairo_test_status_t
+draw_solid_clip (cairo_t *cr, int width, int height)
+{
+ cairo_test_paint_checkered (cr);
+
+ cairo_rectangle (cr, 2.5, 2.5, 27, 27);
+ cairo_clip (cr);
+
+ cairo_set_source_rgb (cr, 1., 0.,0.);
+ cairo_paint_with_alpha (cr, 0.5);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+static cairo_test_status_t
+draw_clip (cairo_t *cr, int width, int height)
+{
+ cairo_surface_t *surface;
+
+ surface = cairo_image_surface_create_for_data ((unsigned char *) data,
+ CAIRO_FORMAT_RGB24, 4, 4, 16);
+
+ cairo_test_paint_checkered (cr);
+
+ cairo_rectangle (cr, 10.5, 10.5, 11, 11);
+ cairo_clip (cr);
+
+ cairo_scale (cr, 4, 4);
+
+ cairo_set_source_surface (cr, surface, 2 , 2);
+ cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
+ cairo_paint_with_alpha (cr, 0.5);
+
+ cairo_surface_finish (surface); /* data will go out of scope */
+ cairo_surface_destroy (surface);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+static cairo_test_status_t
+draw_clip_mask (cairo_t *cr, int width, int height)
+{
+ cairo_surface_t *surface;
+
+ surface = cairo_image_surface_create_for_data ((unsigned char *) data,
+ CAIRO_FORMAT_RGB24, 4, 4, 16);
+
+ cairo_test_paint_checkered (cr);
+
+ cairo_move_to (cr, 16, 5);
+ cairo_line_to (cr, 5, 16);
+ cairo_line_to (cr, 16, 27);
+ cairo_line_to (cr, 27, 16);
+ cairo_clip (cr);
+
+ cairo_scale (cr, 4, 4);
+
+ cairo_set_source_surface (cr, surface, 2 , 2);
+ cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
+ cairo_paint_with_alpha (cr, 0.5);
+
+ cairo_surface_finish (surface); /* data will go out of scope */
+ cairo_surface_destroy (surface);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (paint_with_alpha,
+ "Simple test of cairo_paint_with_alpha",
+ "paint, alpha", /* keywords */
+ NULL, /* requirements */
+ 32, 32,
+ NULL, draw)
+CAIRO_TEST (paint_with_alpha_solid_clip,
+ "Simple test of cairo_paint_with_alpha+unaligned clip",
+ "paint, alpha, clip", /* keywords */
+ NULL, /* requirements */
+ 32, 32,
+ NULL, draw_solid_clip)
+CAIRO_TEST (paint_with_alpha_clip,
+ "Simple test of cairo_paint_with_alpha+unaligned clip",
+ "paint, alpha, clip", /* keywords */
+ NULL, /* requirements */
+ 32, 32,
+ NULL, draw_clip)
+CAIRO_TEST (paint_with_alpha_clip_mask,
+ "Simple test of cairo_paint_with_alpha+unaligned clip",
+ "paint, alpha, clip", /* keywords */
+ NULL, /* requirements */
+ 32, 32,
+ NULL, draw_clip_mask)