initial commit

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

libs/wxWidgets-3.3.1/3rdparty/libwebp/extras/sharpyuv_risk_table.h

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+// Copyright 2023 Google Inc. All Rights Reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the COPYING file in the root of the source
+// tree. An additional intellectual property rights grant can be found
+// in the file PATENTS. All contributing project authors may
+// be found in the AUTHORS file in the root of the source tree.
+// -----------------------------------------------------------------------------
+//
+// Precomputed data for 420 risk estimation.
+
+#ifndef WEBP_EXTRAS_SHARPYUV_RISK_TABLE_H_
+#define WEBP_EXTRAS_SHARPYUV_RISK_TABLE_H_
+
+#include "src/webp/types.h"
+
+extern const int kSharpYuvPrecomputedRiskYuvSampling;
+// Table of precomputed risk scores when chroma subsampling images with two
+// given colors.
+// Since precomputing values for all possible YUV colors would create a huge
+// table, the YUV space (i.e. [0, 255]^3) is reduced to
+// [0, kSharpYuvPrecomputedRiskYuvSampling-1]^3
+// where 255 maps to kSharpYuvPrecomputedRiskYuvSampling-1.
+// Table size: kSharpYuvPrecomputedRiskYuvSampling^6 bytes or 114 KiB
+extern const uint8_t kSharpYuvPrecomputedRisk[];
+
+#endif  // WEBP_EXTRAS_SHARPYUV_RISK_TABLE_H_