Ptex

PtexSeparableKernel.cpp
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1 /*
2 PTEX SOFTWARE
3 Copyright 2014 Disney Enterprises, Inc. All rights reserved
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are
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14 the documentation and/or other materials provided with the
15 distribution.
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17 * The names "Disney", "Walt Disney Pictures", "Walt Disney Animation
18 Studios" or the names of its contributors may NOT be used to
19 endorse or promote products derived from this software without
20 specific prior written permission from Walt Disney Pictures.
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22 Disclaimer: THIS SOFTWARE IS PROVIDED BY WALT DISNEY PICTURES AND
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25 FOR A PARTICULAR PURPOSE, NONINFRINGEMENT AND TITLE ARE DISCLAIMED.
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34 */
35 #include "PtexPlatform.h"
36 #include "PtexUtils.h"
37 #include "PtexHalf.h"
38 #include "PtexSeparableKernel.h"
39
40 PTEX_NAMESPACE_BEGIN
41
42 namespace {
43 // apply to 1..4 channels (unrolled channel loop) of packed data (nTxChan==nChan)
44 template<class T, int nChan>
45 void Apply(PtexSeparableKernel& k, float* result, void* data, int /*nChan*/, int /*nTxChan*/)
46 {
47 float* rowResult = (float*) alloca(nChan*sizeof(float));
48 int rowlen = k.res.u() * nChan;
49 int datalen = k.uw * nChan;
50 int rowskip = rowlen - datalen;
51 float* kvp = k.kv;
52 T* p = static_cast<T*>(data) + (k.v * k.res.u() + k.u) * nChan;
53 T* pEnd = p + k.vw * rowlen;
54 while (p != pEnd)
55 {
56 float* kup = k.ku;
57 T* pRowEnd = p + datalen;
58 // just mult and copy first element
59 PtexUtils::VecMult<T,nChan>()(rowResult, p, *kup++);
60 p += nChan;
61 // accumulate remaining elements
62 while (p != pRowEnd) {
63 // rowResult[i] = p[i] * ku[u] for i in {0..n-1}
64 PtexUtils::VecAccum<T,nChan>()(rowResult, p, *kup++);
65 p += nChan;
66 }
67 // result[i] += rowResult[i] * kv[v] for i in {0..n-1}
68 PtexUtils::VecAccum<float,nChan>()(result, rowResult, *kvp++);
69 p += rowskip;
70 }
71 }
72
73 // apply to 1..4 channels (unrolled channel loop) w/ pixel stride
74 template<class T, int nChan>
75 void ApplyS(PtexSeparableKernel& k, float* result, void* data, int /*nChan*/, int nTxChan)
76 {
77 float* rowResult = (float*) alloca(nChan*sizeof(float));
78 int rowlen = k.res.u() * nTxChan;
79 int datalen = k.uw * nTxChan;
80 int rowskip = rowlen - datalen;
81 float* kvp = k.kv;
82 T* p = static_cast<T*>(data) + (k.v * k.res.u() + k.u) * nTxChan;
83 T* pEnd = p + k.vw * rowlen;
84 while (p != pEnd)
85 {
86 float* kup = k.ku;
87 T* pRowEnd = p + datalen;
88 // just mult and copy first element
89 PtexUtils::VecMult<T,nChan>()(rowResult, p, *kup++);
90 p += nTxChan;
91 // accumulate remaining elements
92 while (p != pRowEnd) {
93 // rowResult[i] = p[i] * ku[u] for i in {0..n-1}
94 PtexUtils::VecAccum<T,nChan>()(rowResult, p, *kup++);
95 p += nTxChan;
96 }
97 // result[i] += rowResult[i] * kv[v] for i in {0..n-1}
98 PtexUtils::VecAccum<float,nChan>()(result, rowResult, *kvp++);
99 p += rowskip;
100 }
101 }
102
103 // apply to N channels (general case)
104 template<class T>
105 void ApplyN(PtexSeparableKernel& k, float* result, void* data, int nChan, int nTxChan)
106 {
107 float* rowResult = (float*) alloca(nChan*sizeof(float));
108 int rowlen = k.res.u() * nTxChan;
109 int datalen = k.uw * nTxChan;
110 int rowskip = rowlen - datalen;
111 float* kvp = k.kv;
112 T* p = static_cast<T*>(data) + (k.v * k.res.u() + k.u) * nTxChan;
113 T* pEnd = p + k.vw * rowlen;
114 while (p != pEnd)
115 {
116 float* kup = k.ku;
117 T* pRowEnd = p + datalen;
118 // just mult and copy first element
119 PtexUtils::VecMultN<T>()(rowResult, p, nChan, *kup++);
120 p += nTxChan;
121 // accumulate remaining elements
122 while (p != pRowEnd) {
123 // rowResult[i] = p[i] * ku[u] for i in {0..n-1}
124 PtexUtils::VecAccumN<T>()(rowResult, p, nChan, *kup++);
125 p += nTxChan;
126 }
127 // result[i] += rowResult[i] * kv[v] for i in {0..n-1}
128 PtexUtils::VecAccumN<float>()(result, rowResult, nChan, *kvp++);
129 p += rowskip;
130 }
131 }
132 }
133
134
135
136 PtexSeparableKernel::ApplyFn
137 PtexSeparableKernel::applyFunctions[] = {
138 // nChan == nTxChan
139 ApplyN<uint8_t>, ApplyN<uint16_t>, ApplyN<PtexHalf>, ApplyN<float>,
140 Apply<uint8_t,1>, Apply<uint16_t,1>, Apply<PtexHalf,1>, Apply<float,1>,
141 Apply<uint8_t,2>, Apply<uint16_t,2>, Apply<PtexHalf,2>, Apply<float,2>,
142 Apply<uint8_t,3>, Apply<uint16_t,3>, Apply<PtexHalf,3>, Apply<float,3>,
143 Apply<uint8_t,4>, Apply<uint16_t,4>, Apply<PtexHalf,4>, Apply<float,4>,
144
145 // nChan != nTxChan (need pixel stride)
146 ApplyN<uint8_t>, ApplyN<uint16_t>, ApplyN<PtexHalf>, ApplyN<float>,
147 ApplyS<uint8_t,1>, ApplyS<uint16_t,1>, ApplyS<PtexHalf,1>, ApplyS<float,1>,
148 ApplyS<uint8_t,2>, ApplyS<uint16_t,2>, ApplyS<PtexHalf,2>, ApplyS<float,2>,
149 ApplyS<uint8_t,3>, ApplyS<uint16_t,3>, ApplyS<PtexHalf,3>, ApplyS<float,3>,
150 ApplyS<uint8_t,4>, ApplyS<uint16_t,4>, ApplyS<PtexHalf,4>, ApplyS<float,4>,
151 };
152
153 PTEX_NAMESPACE_END
PtexUtils::VecMultN
Definition: PtexUtils.h:237
PtexSeparableKernel::v
int v
Definition: PtexSeparableKernel.h:51
PtexSeparableKernel::uw
int uw
Definition: PtexSeparableKernel.h:52
PtexSeparableKernel::applyFunctions
static ApplyFn applyFunctions[40]
Definition: PtexSeparableKernel.h:472
PTEX_NAMESPACE_END
#define PTEX_NAMESPACE_END
Definition: PtexVersion.h:62
PtexUtils.h
PtexUtils::VecAccum
Definition: PtexUtils.h:200
PtexSeparableKernel
Definition: PtexSeparableKernel.h:48
PtexUtils::VecMult
Definition: PtexUtils.h:223
PtexSeparableKernel::vw
int vw
Definition: PtexSeparableKernel.h:52
PTEX_NAMESPACE_BEGIN::ApplyN
void ApplyN(PtexSeparableKernel &k, float *result, void *data, int nChan, int nTxChan)
Definition: PtexSeparableKernel.cpp:105
PtexSeparableKernel::ku
float * ku
Definition: PtexSeparableKernel.h:53
PTEX_NAMESPACE_BEGIN::ApplyS
void ApplyS(PtexSeparableKernel &k, float *result, void *data, int, int nTxChan)
Definition: PtexSeparableKernel.cpp:75
PTEX_NAMESPACE_BEGIN::Apply
void Apply(PtexSeparableKernel &k, float *result, void *data, int, int)
Definition: PtexSeparableKernel.cpp:45
PTEX_NAMESPACE_BEGIN
Definition: PtexSeparableKernel.cpp:42
PtexUtils::VecAccumN
Definition: PtexUtils.h:214
PtexSeparableKernel.h
PtexSeparableKernel::res
Res res
Definition: PtexSeparableKernel.h:50
PtexSeparableKernel::u
int u
Definition: PtexSeparableKernel.h:51
PtexSeparableKernel::ApplyFn
void(* ApplyFn)(PtexSeparableKernel &k, float *dst, void *data, int nChan, int nTxChan)
Definition: PtexSeparableKernel.h:470
PtexSeparableKernel::kv
float * kv
Definition: PtexSeparableKernel.h:54
PtexPlatform.h
Platform-specific classes, functions, and includes.
PtexHalf.h
Half-precision floating-point type.