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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions 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.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 COPYRIGHT OWNER 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.
*/
#include "common.h"
///////////////////////////////////////////////////////////////////////////////
/// \brief upscale one component of a displacement field, CUDA kernel
/// \param[in] width field width
/// \param[in] height field height
/// \param[in] stride field stride
/// \param[in] scale scale factor (multiplier)
/// \param[out] out result
///////////////////////////////////////////////////////////////////////////////
__global__ void UpscaleKernel(int width, int height, int stride, float scale,
float *out, cudaTextureObject_t texCoarse) {
const int ix = threadIdx.x + blockIdx.x * blockDim.x;
const int iy = threadIdx.y + blockIdx.y * blockDim.y;
if (ix >= width || iy >= height) return;
float x = ((float)ix + 0.5f) / (float)width;
float y = ((float)iy + 0.5f) / (float)height;
// exploit hardware interpolation
// and scale interpolated vector to match next pyramid level resolution
out[ix + iy * stride] = tex2D<float>(texCoarse, x, y) * scale;
}
///////////////////////////////////////////////////////////////////////////////
/// \brief upscale one component of a displacement field, kernel wrapper
/// \param[in] src field component to upscale
/// \param[in] width field current width
/// \param[in] height field current height
/// \param[in] stride field current stride
/// \param[in] newWidth field new width
/// \param[in] newHeight field new height
/// \param[in] newStride field new stride
/// \param[in] scale value scale factor (multiplier)
/// \param[out] out upscaled field component
///////////////////////////////////////////////////////////////////////////////
static void Upscale(const float *src, int width, int height, int stride,
int newWidth, int newHeight, int newStride, float scale,
float *out) {
dim3 threads(32, 8);
dim3 blocks(iDivUp(newWidth, threads.x), iDivUp(newHeight, threads.y));
cudaTextureObject_t texCoarse;
cudaResourceDesc texRes;
memset(&texRes, 0, sizeof(cudaResourceDesc));
texRes.resType = cudaResourceTypePitch2D;
texRes.res.pitch2D.devPtr = (void *)src;
texRes.res.pitch2D.desc = cudaCreateChannelDesc<float>();
texRes.res.pitch2D.width = width;
texRes.res.pitch2D.height = height;
texRes.res.pitch2D.pitchInBytes = stride * sizeof(float);
cudaTextureDesc texDescr;
memset(&texDescr, 0, sizeof(cudaTextureDesc));
texDescr.normalizedCoords = true;
texDescr.filterMode = cudaFilterModeLinear;
texDescr.addressMode[0] = cudaAddressModeMirror;
texDescr.addressMode[1] = cudaAddressModeMirror;
texDescr.readMode = cudaReadModeElementType;
checkCudaErrors(
cudaCreateTextureObject(&texCoarse, &texRes, &texDescr, NULL));
UpscaleKernel<<<blocks, threads>>>(newWidth, newHeight, newStride, scale, out,
texCoarse);
}
|
