[PATCH i-g-t, v2 1/3] lib/igt_chamelium: Add chamelium_frame_match_or_dump_frame_pair()

[Swati Sharma]

Add chamelium_frame_match_or_dump_frame_pair() to compare frame
dumps captured from chamelium. If they do not, this saves the
reference and captured frames to a png file.

v2: -let crc be computed from compared_frames_dump() (Chaitanya)
    -remove passing of reference_crc (Chaitanya)

Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
---
 lib/igt_chamelium.c | 46 +++++++++++++++++++++++++++++++++++++++++++++
 lib/igt_chamelium.h |  5 +++++
 2 files changed, 51 insertions(+)

diff --git a/lib/igt_chamelium.c b/lib/igt_chamelium.c
index 620fbbf7d..c86773898 100644
--- a/lib/igt_chamelium.c
+++ b/lib/igt_chamelium.c
@@ -2070,6 +2070,52 @@ bool chamelium_frame_match_or_dump(struct chamelium *chamelium,
 	return match;
 }
 
+/**
+ * chamelium_frame_match_or_dump_frame_pair:
+ * @chamelium: The chamelium instance the frame dump belongs to
+ * @frame0: The chamelium reference frame dump to match
+ * @frame1: The chamelium capture frame dump to match
+ * @check: the type of frame matching check to use
+ *
+ * Returns bool that the provided captured frames matches.
+ * If they do not, this saves the frames to a png file.
+ */
+bool chamelium_frame_match_or_dump_frame_pair(struct chamelium *chamelium,
+					      struct chamelium_port *port,
+					      const struct chamelium_frame_dump *frame0,
+					      const struct chamelium_frame_dump *frame1,
+					      enum chamelium_check check)
+{
+	cairo_surface_t *reference;
+	cairo_surface_t *capture;
+	bool match;
+
+	/* Grab the captured reference frame from chamelium */
+	reference = convert_frame_dump_argb32(frame0);
+
+	/* Grab the captured frame from chamelium */
+	capture = convert_frame_dump_argb32(frame1);
+
+	switch (check) {
+	case CHAMELIUM_CHECK_ANALOG:
+		match = igt_check_analog_frame_match(reference, capture);
+		break;
+	case CHAMELIUM_CHECK_CHECKERBOARD:
+		match = igt_check_checkerboard_frame_match(reference, capture);
+		break;
+	default:
+		igt_assert(false);
+	}
+
+	if (!match && igt_frame_dump_is_enabled())
+		compared_frames_dump(reference, capture, 0, 0);
+
+	cairo_surface_destroy(reference);
+	cairo_surface_destroy(capture);
+
+	return match;
+}
+
 /**
  * chamelium_analog_frame_crop:
  * @chamelium: The Chamelium instance to use
diff --git a/lib/igt_chamelium.h b/lib/igt_chamelium.h
index d979de4a2..8882e13fb 100644
--- a/lib/igt_chamelium.h
+++ b/lib/igt_chamelium.h
@@ -257,6 +257,11 @@ bool chamelium_frame_match_or_dump(struct chamelium *chamelium,
 				   const struct chamelium_frame_dump *frame,
 				   struct igt_fb *fb,
 				   enum chamelium_check check);
+bool chamelium_frame_match_or_dump_frame_pair(struct chamelium *chamelium,
+					      struct chamelium_port *port,
+					      const struct chamelium_frame_dump *frame0,
+					      const struct chamelium_frame_dump *frame1,
+					      enum chamelium_check check);
 void chamelium_crop_analog_frame(struct chamelium_frame_dump *dump, int width,
 				 int height);
 void chamelium_destroy_frame_dump(struct chamelium_frame_dump *dump);
-- 
2.25.1