2 * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
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8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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20 * DEALINGS IN THE SOFTWARE.
25 __global__ void Thumbnail_uchar(cudaTextureObject_t uchar_tex,
26 int *histogram, int src_width, int src_height)
28 int x = blockIdx.x * blockDim.x + threadIdx.x;
29 int y = blockIdx.y * blockDim.y + threadIdx.y;
30 if (y < src_height && x < src_width)
32 unsigned char pixel = tex2D<unsigned char>(uchar_tex, x, y);
33 atomicAdd(&histogram[pixel], 1);
37 __global__ void Thumbnail_uchar2(cudaTextureObject_t uchar2_tex,
38 int *histogram, int src_width, int src_height)
40 int x = blockIdx.x * blockDim.x + threadIdx.x;
41 int y = blockIdx.y * blockDim.y + threadIdx.y;
43 if (y < src_height && x < src_width)
45 uchar2 pixel = tex2D<uchar2>(uchar2_tex, x, y);
46 atomicAdd(&histogram[pixel.x], 1);
47 atomicAdd(&histogram[256 + pixel.y], 1);
51 __global__ void Thumbnail_ushort(cudaTextureObject_t ushort_tex,
52 int *histogram, int src_width, int src_height)
54 int x = blockIdx.x * blockDim.x + threadIdx.x;
55 int y = blockIdx.y * blockDim.y + threadIdx.y;
57 if (y < src_height && x < src_width)
59 unsigned short pixel = (tex2D<unsigned short>(ushort_tex, x, y) + 128) >> 8;
60 atomicAdd(&histogram[pixel], 1);
64 __global__ void Thumbnail_ushort2(cudaTextureObject_t ushort2_tex,
65 int *histogram, int src_width, int src_height)
67 int x = blockIdx.x * blockDim.x + threadIdx.x;
68 int y = blockIdx.y * blockDim.y + threadIdx.y;
70 if (y < src_height && x < src_width)
72 ushort2 pixel = tex2D<ushort2>(ushort2_tex, x, y);
73 atomicAdd(&histogram[(pixel.x + 128) >> 8], 1);
74 atomicAdd(&histogram[256 + ((pixel.y + 128) >> 8)], 1);