summaryrefslogtreecommitdiff
path: root/libs/cairo-1.16.0/test/scale-offset-similar.c
diff options
context:
space:
mode:
Diffstat (limited to 'libs/cairo-1.16.0/test/scale-offset-similar.c')
-rw-r--r--libs/cairo-1.16.0/test/scale-offset-similar.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/scale-offset-similar.c b/libs/cairo-1.16.0/test/scale-offset-similar.c
new file mode 100644
index 0000000..32a083c
--- /dev/null
+++ b/libs/cairo-1.16.0/test/scale-offset-similar.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2008 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>
+ */
+
+/*
+ * Test case derived from the bug report by Michel Iwaniec:
+ * https://lists.cairographics.org/archives/cairo/2008-November/015660.html
+ */
+
+#include "cairo-test.h"
+
+static cairo_surface_t *
+create_source (cairo_surface_t *target, int width, int height)
+{
+ cairo_surface_t *similar;
+ cairo_t *cr;
+
+ similar = cairo_surface_create_similar (target,
+ CAIRO_CONTENT_COLOR,
+ width, height);
+ cr = cairo_create (similar);
+ cairo_surface_destroy (similar);
+
+ cairo_set_source_rgb (cr, 1, 1, 1);
+ cairo_rectangle (cr,
+ width - 4, height - 4,
+ 2, 2);
+ cairo_fill (cr);
+ cairo_set_source_rgb (cr, 1, 0, 0);
+ cairo_rectangle (cr,
+ width - 2, height - 4,
+ 2, 2);
+ cairo_fill (cr);
+ cairo_set_source_rgb (cr, 0, 1, 0);
+ cairo_rectangle (cr,
+ width - 4, height - 2,
+ 2, 2);
+ cairo_fill (cr);
+ cairo_set_source_rgb (cr, 0, 0, 1);
+ cairo_rectangle (cr,
+ width - 2, height - 2,
+ 2, 2);
+ cairo_fill (cr);
+
+ similar = cairo_surface_reference (cairo_get_target (cr));
+ cairo_destroy (cr);
+
+ return similar;
+}
+
+static void
+draw_grid (cairo_t *cr, cairo_pattern_t *pattern, int dst_x, int dst_y)
+{
+ cairo_matrix_t m;
+
+ cairo_save (cr);
+ cairo_translate (cr, dst_x, dst_y);
+ cairo_scale (cr, 16, 16);
+ cairo_rotate (cr, 1);
+
+ cairo_matrix_init_translate (&m, 2560-4, 1280-4);
+ cairo_pattern_set_matrix (pattern, &m);
+ cairo_set_source (cr, pattern);
+ cairo_rectangle (cr, 0, 0, 4, 4);
+ cairo_fill (cr);
+
+ cairo_set_source_rgb (cr, .7, .7, .7);
+ cairo_set_line_width (cr, 1./16);
+ cairo_move_to (cr, 0, 0);
+ cairo_line_to (cr, 4, 0);
+ cairo_move_to (cr, 0, 2);
+ cairo_line_to (cr, 4, 2);
+ cairo_move_to (cr, 0, 4);
+ cairo_line_to (cr, 4, 4);
+ cairo_move_to (cr, 0, 0);
+ cairo_line_to (cr, 0, 4);
+ cairo_move_to (cr, 2, 0);
+ cairo_line_to (cr, 2, 4);
+ cairo_move_to (cr, 4, 0);
+ cairo_line_to (cr, 4, 4);
+ cairo_stroke (cr);
+
+ cairo_restore (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+ cairo_surface_t *source;
+ cairo_pattern_t *pattern;
+
+ cairo_paint (cr);
+
+ source = create_source (cairo_get_target (cr), 2560, 1280);
+ pattern = cairo_pattern_create_for_surface (source);
+ cairo_surface_destroy (source);
+
+ cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);
+ cairo_pattern_set_extend (pattern, CAIRO_EXTEND_NONE);
+
+ draw_grid (cr, pattern, 50, 0);
+ draw_grid (cr, pattern, 130, 0);
+ draw_grid (cr, pattern, 210, 0);
+ draw_grid (cr, pattern, 290, 0);
+
+ draw_grid (cr, pattern, 50, 230);
+ draw_grid (cr, pattern, 130, 230);
+ draw_grid (cr, pattern, 210, 230);
+ draw_grid (cr, pattern, 290, 230);
+
+ cairo_pattern_destroy (pattern);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (scale_offset_similar,
+ "Tests drawing surfaces under various scales and transforms",
+ "surface, scale-offset", /* keywords */
+ NULL, /* requirements */
+ 320, 320,
+ NULL, draw)
+