From 2c34f028a787a7e33e3410f09d6cc00caacf0a08 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 23 Sep 2011 13:37:51 +0100
Subject: [PATCH] test: Exercise scaling from an atlas through a subsurface

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 test/Makefile.refs                           |   3 +-
 test/Makefile.sources                        |   1 +
 test/reference/subsurface-scale.base.ref.png | Bin 0 -> 5216 bytes
 test/reference/subsurface-scale.ref.png      | Bin 0 -> 5216 bytes
 test/subsurface-scale.c                      |  93 +++++++++++++++++++
 5 files changed, 96 insertions(+), 1 deletion(-)
 create mode 100644 test/reference/subsurface-scale.base.ref.png
 create mode 100644 test/reference/subsurface-scale.ref.png
 create mode 100644 test/subsurface-scale.c

diff --git a/test/Makefile.refs b/test/Makefile.refs
index 1abb53365..3a40b4721 100644
--- a/test/Makefile.refs
+++ b/test/Makefile.refs
@@ -2533,6 +2533,8 @@ REFERENCE_IMAGES = \
 	reference/subsurface-repeat.ref.png \
 	reference/subsurface-repeat.traps.argb32.ref.png \
 	reference/subsurface-repeat.traps.rgb24.ref.png \
+	reference/subsurface-scale.base.ref.png \
+	reference/subsurface-scale.ref.png \
 	reference/subsurface-similar-repeat.base.argb32.ref.png \
 	reference/subsurface-similar-repeat.base.rgb24.ref.png \
 	reference/subsurface-similar-repeat.ref.png \
@@ -2665,7 +2667,6 @@ REFERENCE_IMAGES = \
 	reference/text-pattern.quartz.argb32.ref.png \
 	reference/text-pattern.quartz.rgb24.ref.png \
 	reference/text-pattern.ref.png \
-	reference/text-pattern.rgb24.ref.png \
 	reference/text-pattern.svg.argb32.ref.png \
 	reference/text-pattern.svg.rgb24.ref.png \
 	reference/text-pattern.traps.argb32.ref.png \
diff --git a/test/Makefile.sources b/test/Makefile.sources
index b7d216539..f9aa66ccf 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -300,6 +300,7 @@ test_sources = \
 	subsurface-modify-child.c                       \
 	subsurface-modify-parent.c                      \
 	subsurface-outside-target.c                     \
+	subsurface-scale.c                              \
 	subsurface-similar-repeat.c                     \
 	surface-finish-twice.c				\
 	surface-pattern.c				\
diff --git a/test/reference/subsurface-scale.base.ref.png b/test/reference/subsurface-scale.base.ref.png
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diff --git a/test/subsurface-scale.c b/test/subsurface-scale.c
new file mode 100644
index 000000000..d5e2d9517
--- /dev/null
+++ b/test/subsurface-scale.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2009 Intel 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
+ * Intel not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Intel makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * INTEL CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL INTEL 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.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_surface_t *region[5];
+    const char *text = "Cairo";
+    int i;
+
+    cairo_set_source_rgb (cr, 1, 1, 1);
+    cairo_paint (cr);
+
+    cairo_rectangle (cr, 0, 20, 200, 60);
+    cairo_set_source_rgb (cr, 1, 0, 0);
+    cairo_fill (cr);
+
+    cairo_set_source_rgb (cr, 0, 0, 0);
+
+    for (i = 0; i < 5; i++) {
+	cairo_t *cr_region;
+	cairo_text_extents_t extents;
+	char buf[2] = { text[i], '\0' };
+
+        region[i] = cairo_surface_create_for_rectangle (cairo_get_target (cr),
+                                                        20 * i, 0, 20, 20);
+
+	cr_region = cairo_create (region[i]);
+	cairo_surface_destroy (region[i]);
+
+	cairo_select_font_face (cr_region, "@cairo:",
+				CAIRO_FONT_WEIGHT_NORMAL,
+				CAIRO_FONT_SLANT_NORMAL);
+	cairo_set_font_size (cr_region, 20);
+	cairo_text_extents (cr_region, buf, &extents);
+	cairo_move_to (cr_region,
+		       10 - (extents.width/2 + extents.x_bearing),
+		       10 - (extents.height/2 + extents.y_bearing));
+	cairo_show_text (cr_region, buf);
+
+	region[i] = cairo_surface_reference (cairo_get_target (cr_region));
+	cairo_destroy (cr_region);
+    }
+
+    cairo_scale (cr, 2, 2);
+    for (i = 0; i < 5; i++) {
+	cairo_set_source_surface (cr, region[5-i-1], 20 * i, 20);
+	cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_PAD);
+	cairo_rectangle (cr, 20*i, 20, 20, 20);
+	cairo_fill (cr);
+    }
+
+    for (i = 0; i < 5; i++) {
+	cairo_set_source_surface (cr, region[5-i-1], 20 * i, 40);
+	cairo_paint_with_alpha (cr, .5);
+    }
+
+    for (i = 0; i < 5; i++)
+	cairo_surface_destroy (region[i]);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (subsurface_scale,
+	    "Tests clipping of both source and destination using subsurfaces",
+	    "subsurface", /* keywords */
+	    NULL, /* requirements */
+	    200, 120,
+	    NULL, draw)