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
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
25 texture<unsigned char, 2> uchar_tex;
26 texture<uchar2, 2> uchar2_tex;
27 texture<unsigned short, 2> ushort_tex;
28 texture<ushort2, 2> ushort2_tex;
30 __global__ void Thumbnail_uchar(int *histogram, int src_width, int src_height)
32 int x = blockIdx.x * blockDim.x + threadIdx.x;
33 int y = blockIdx.y * blockDim.y + threadIdx.y;
34 if (y < src_height && x < src_width)
36 unsigned char pixel = tex2D(uchar_tex, x, y);
37 atomicAdd(&histogram[pixel], 1);
41 __global__ void Thumbnail_uchar2(int *histogram, int src_width, int src_height)
43 int x = blockIdx.x * blockDim.x + threadIdx.x;
44 int y = blockIdx.y * blockDim.y + threadIdx.y;
46 if (y < src_height && x < src_width)
48 uchar2 pixel = tex2D(uchar2_tex, x, y);
49 atomicAdd(&histogram[pixel.x], 1);
50 atomicAdd(&histogram[256 + pixel.y], 1);
54 __global__ void Thumbnail_ushort(int *histogram, int src_width, int src_height)
56 int x = blockIdx.x * blockDim.x + threadIdx.x;
57 int y = blockIdx.y * blockDim.y + threadIdx.y;
59 if (y < src_height && x < src_width)
61 unsigned short pixel = (tex2D(ushort_tex, x, y) + 128) >> 8;
62 atomicAdd(&histogram[pixel], 1);
66 __global__ void Thumbnail_ushort2(int *histogram, int src_width, int src_height)
68 int x = blockIdx.x * blockDim.x + threadIdx.x;
69 int y = blockIdx.y * blockDim.y + threadIdx.y;
71 if (y < src_height && x < src_width)
73 ushort2 pixel = tex2D(ushort2_tex, x, y);
74 atomicAdd(&histogram[(pixel.x + 128) >> 8], 1);
75 atomicAdd(&histogram[256 + (pixel.y + 128) >> 8], 1);