lib: Add igt_color_encoding

Add some helpers for generating rgb<->ycbcr conversion matrices.

v2: Add enums for color_encoding/color_range
    Fix full range handling (lacked +-0.5<->+-1.0 scaling)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 49 insertions, 0 deletions

diff --git a/lib/igt_color_encoding.h b/lib/igt_color_encoding.h
new file mode 100644
index 00000000..0d8c8193
--- /dev/null
+++ b/lib/igt_color_encoding.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2018 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef __IGT_COLOR_ENCODING_H__
+#define __IGT_COLOR_ENCODING_H__
+
+#include <stdbool.h>
+
+#include "igt_matrix.h"
+
+enum igt_color_encoding {
+	IGT_COLOR_YCBCR_BT601,
+	IGT_COLOR_YCBCR_BT709,
+	IGT_COLOR_YCBCR_BT2020,
+	IGT_NUM_COLOR_ENCODINGS,
+};
+
+enum igt_color_range {
+	IGT_COLOR_YCBCR_LIMITED_RANGE,
+	IGT_COLOR_YCBCR_FULL_RANGE,
+	IGT_NUM_COLOR_RANGES,
+};
+
+struct igt_mat4 igt_ycbcr_to_rgb_matrix(enum igt_color_encoding color_encoding,
+					enum igt_color_range color_range);
+struct igt_mat4 igt_rgb_to_ycbcr_matrix(enum igt_color_encoding color_encoding,
+					enum igt_color_range color_range);
+
+#endif /* __IGT_COLOR_ENCODING_H__ */