vendor: OpenCV 5.0.0 snapshot at 755e50675d97db9b7d449d8bd6b09888646f6c6e

2026-08-22 00:11:13 +08:00
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+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "opencv2/opencv_modules.hpp"
+
+#ifndef HAVE_OPENCV_CUDEV
+
+#error "opencv_cudev is required"
+
+#else
+
+#include "../lut.hpp"
+
+#include "opencv2/cudaarithm.hpp"
+#include "opencv2/cudev.hpp"
+#include "opencv2/core/private.cuda.hpp"
+#include <opencv2/cudev/ptr2d/texture.hpp>
+
+using namespace cv;
+using namespace cv::cuda;
+using namespace cv::cudev;
+
+namespace cv { namespace cuda {
+
+    LookUpTableImpl::LookUpTableImpl(InputArray _lut)
+    {
+        if (_lut.kind() == _InputArray::CUDA_GPU_MAT)
+        {
+            d_lut = _lut.getGpuMat();
+        }
+        else
+        {
+            Mat h_lut = _lut.getMat();
+            d_lut.upload(Mat(1, 256, h_lut.type(), h_lut.data));
+        }
+        CV_Assert( d_lut.depth() == CV_8U );
+        CV_Assert( d_lut.rows == 1 && d_lut.cols == 256 );
+        szInBytes = 256 * d_lut.channels() * sizeof(uchar);
+    }
+
+    struct LutTablePtrC1
+    {
+        typedef uchar value_type;
+        typedef uchar index_type;
+        cv::cudev::TexturePtr<uchar> tex;
+        __device__ __forceinline__ uchar operator ()(uchar, uchar x) const {
+            return tex(x);
+        }
+    };
+
+    struct LutTablePtrC3
+    {
+        typedef uchar3 value_type;
+        typedef uchar3 index_type;
+        cv::cudev::TexturePtr<uchar> tex;
+        __device__ __forceinline__ uchar3 operator ()(const uchar3&, const uchar3& x) const {
+            return make_uchar3(tex(x.x * 3), tex(x.y * 3 + 1), tex(x.z * 3 + 2));
+        }
+    };
+
+    void LookUpTableImpl::transform(InputArray _src, OutputArray _dst, Stream& stream)
+    {
+        GpuMat src = getInputMat(_src, stream);
+
+        const int cn = src.channels();
+        const int lut_cn = d_lut.channels();
+
+        CV_Assert( src.type() == CV_8UC1 || src.type() == CV_8UC3 );
+        CV_Assert( lut_cn == 1 || lut_cn == cn );
+
+        GpuMat dst = getOutputMat(_dst, src.size(), src.type(), stream);
+
+        if (lut_cn == 1)
+        {
+            GpuMat_<uchar> src1(src.reshape(1));
+            GpuMat_<uchar> dst1(dst.reshape(1));
+            cv::cudev::Texture<uchar> tex(szInBytes, reinterpret_cast<uchar*>(d_lut.data));
+            LutTablePtrC1 tbl;
+            tbl.tex = TexturePtr<uchar>(tex);
+            dst1.assign(lut_(src1, tbl), stream);
+        }
+        else if (lut_cn == 3)
+        {
+            GpuMat_<uchar3>& src3 = (GpuMat_<uchar3>&) src;
+            GpuMat_<uchar3>& dst3 = (GpuMat_<uchar3>&) dst;
+            cv::cudev::Texture<uchar> tex(szInBytes, reinterpret_cast<uchar*>(d_lut.data));
+            LutTablePtrC3 tbl;
+            tbl.tex = TexturePtr<uchar>(tex);
+            dst3.assign(lut_(src3, tbl), stream);
+        }
+
+        syncOutput(dst, _dst, stream);
+    }
+
+} }
+
+#endif