1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* 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 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.
*/
extern "C" {
texture<unsigned char, 2> uchar_tex;
texture<uchar2, 2> uchar2_tex;
texture<unsigned short, 2> ushort_tex;
texture<ushort2, 2> ushort2_tex;
__global__ void Thumbnail_uchar(int *histogram, int src_width, int src_height)
{
int x = blockIdx.x * blockDim.x + threadIdx.x;
int y = blockIdx.y * blockDim.y + threadIdx.y;
if (y < src_height && x < src_width)
{
unsigned char pixel = tex2D(uchar_tex, x, y);
atomicAdd(&histogram[pixel], 1);
}
}
__global__ void Thumbnail_uchar2(int *histogram, int src_width, int src_height)
{
int x = blockIdx.x * blockDim.x + threadIdx.x;
int y = blockIdx.y * blockDim.y + threadIdx.y;
if (y < src_height && x < src_width)
{
uchar2 pixel = tex2D(uchar2_tex, x, y);
atomicAdd(&histogram[pixel.x], 1);
atomicAdd(&histogram[256 + pixel.y], 1);
}
}
__global__ void Thumbnail_ushort(int *histogram, int src_width, int src_height)
{
int x = blockIdx.x * blockDim.x + threadIdx.x;
int y = blockIdx.y * blockDim.y + threadIdx.y;
if (y < src_height && x < src_width)
{
unsigned short pixel = (tex2D(ushort_tex, x, y) + 128) >> 8;
atomicAdd(&histogram[pixel], 1);
}
}
__global__ void Thumbnail_ushort2(int *histogram, int src_width, int src_height)
{
int x = blockIdx.x * blockDim.x + threadIdx.x;
int y = blockIdx.y * blockDim.y + threadIdx.y;
if (y < src_height && x < src_width)
{
ushort2 pixel = tex2D(ushort2_tex, x, y);
atomicAdd(&histogram[(pixel.x + 128) >> 8], 1);
atomicAdd(&histogram[256 + (pixel.y + 128) >> 8], 1);
}
}
}
|
