Attachment 17797 Details for Bug 16469 – cairo test for device offset with scale

[patch] cairo test for device offset with scale

add-test (text/plain), 4.15 KB, created by Jeff Muizelaar on 2008-07-21 08:18:52 UTC

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Creator: Jeff Muizelaar

Created: 2008-07-21 08:18:52 UTC

Size: 4.15 KB

patch

obsolete

>Add a test for scaling a surface with device offset.
>
>From: Jeff Muizelaar <jmuizelaar@mozilla.com>
>
>
>---
>
> test/Makefile.am                 |    2 +
> test/device-offset-scale-ref.png |  Bin
> test/device-offset-scale.c       |   81 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 83 insertions(+), 0 deletions(-)
> create mode 100644 test/device-offset-scale-ref.png
> create mode 100644 test/device-offset-scale.c
>
>diff --git a/test/Makefile.am b/test/Makefile.am
>index c7c265f..9554a28 100644
>--- a/test/Makefile.am
>+++ b/test/Makefile.am
>@@ -41,6 +41,7 @@ degenerate-path$(EXEEXT)				\
> degenerate-pen$(EXEEXT)					\
> device-offset$(EXEEXT)					\
> device-offset-positive$(EXEEXT)				\
>+device-offset-scale$(EXEEXT)				\
> extend-pad$(EXEEXT)					\
> extend-reflect$(EXEEXT)					\
> extend-reflect-similar$(EXEEXT)				\
>@@ -369,6 +370,7 @@ REFERENCE_IMAGES = \
> 	device-offset-positive-rgb24-ref.png	\
> 	device-offset-ref.png	\
> 	device-offset-rgb24-ref.png	\
>+	device-offset-scale-ref.png	\
> 	extend-pad-ref.png	\
> 	extend-reflect-ref.png	\
> 	extend-reflect-similar-ref.png	\
>diff --git a/test/device-offset-scale-ref.png b/test/device-offset-scale-ref.png
>new file mode 100644
>index 0000000..66b2973
>Binary files /dev/null and b/test/device-offset-scale-ref.png differ
>diff --git a/test/device-offset-scale.c b/test/device-offset-scale.c
>new file mode 100644
>index 0000000..5134589
>--- /dev/null
>+++ b/test/device-offset-scale.c
>@@ -0,0 +1,81 @@
>+/*
>+ * Copyright © 2008 Mozilla Corporation
>+ *
>+ * 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
>+ * Mozilla Corporation not be used in advertising or publicity pertaining to
>+ * distribution of the software without specific, written prior
>+ * permission. Mozilla Corporation makes no representations about the
>+ * suitability of this software for any purpose.  It is provided "as
>+ * is" without express or implied warranty.
>+ *
>+ * MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
>+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
>+ * FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION 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: Michael Ventnor, Jeff Muizelaar
>+ */
>+
>+#include "cairo-test.h"
>+
>+#define WIDTH 20
>+#define HEIGHT 20
>+
>+static cairo_test_draw_function_t draw;
>+
>+cairo_test_t test = {
>+    "device-offset-scale",
>+    "Test that the device-offset transform is transformed by the ctm.",
>+    WIDTH, HEIGHT,
>+    draw
>+};
>+
>+static cairo_test_status_t
>+draw (cairo_t *cr, int width, int height)
>+{
>+    cairo_t *second_cr;
>+    cairo_surface_t *second = cairo_image_surface_create (CAIRO_FORMAT_A8, 10, 10);
>+
>+    /* fill with black so we don't need an rgb test case */
>+    cairo_set_source_rgb (cr, 0, 0, 0);
>+    cairo_paint (cr);
>+
>+    /* adjust the offset so that the second rectangle will fit on the surface */
>+    cairo_surface_set_device_offset (second, -6, -6);
>+
>+    cairo_scale (cr, 0.5, 0.5);
>+
>+    /* draw the first rectangle */
>+    cairo_set_source_rgb (cr, 0, 0, 0.4);
>+    cairo_rectangle (cr, 6, 6, 10, 10);
>+    cairo_fill (cr);
>+
>+    /* draw the second rectangle:
>+     * this rectangle should end up in the same place as the rectangle above
>+     * independent of the device offset of the surface it is painted on*/
>+    second_cr = cairo_create (second);
>+    cairo_rectangle (second_cr, 6, 6, 10, 10);
>+    cairo_fill (second_cr);
>+
>+    /* paint the second rectangle on top of the first rectangle */
>+    cairo_set_source_rgb (cr, 0.5, 0.5, 0);
>+    cairo_mask_surface (cr, second, 0, 0);
>+
>+    cairo_destroy (second_cr);
>+    cairo_surface_destroy (second);
>+
>+    return CAIRO_TEST_SUCCESS;
>+}
>+
>+int
>+main (void)
>+{
>+    return cairo_test (&test);
>+}

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