forked from arrayfire/arrayfire
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathtransform.cpp
More file actions
186 lines (155 loc) · 6.45 KB
/
transform.cpp
File metadata and controls
186 lines (155 loc) · 6.45 KB
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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
/*******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <af/image.h>
#include <af/defines.h>
#include <err_common.hpp>
#include <handle.hpp>
#include <ArrayInfo.hpp>
#include <backend.hpp>
#include <transform.hpp>
using af::dim4;
using namespace detail;
template<typename T>
static inline af_array transform(const af_array in, const af_array tf, const af::dim4 &odims,
const af_interp_type method, const bool inverse, const bool perspective)
{
return getHandle(transform<T>(getArray<T>(in), getArray<float>(tf), odims, method, inverse, perspective));
}
af_err af_transform(af_array *out, const af_array in, const af_array tf,
const dim_t odim0, const dim_t odim1,
const af_interp_type method, const bool inverse)
{
try {
ArrayInfo t_info = getInfo(tf);
ArrayInfo i_info = getInfo(in);
af::dim4 idims = i_info.dims();
af::dim4 tdims = t_info.dims();
af_dtype itype = i_info.getType();
ARG_ASSERT(2, t_info.getType() == f32);
ARG_ASSERT(5, method == AF_INTERP_NEAREST ||
method == AF_INTERP_BILINEAR ||
method == AF_INTERP_LOWER);
DIM_ASSERT(2, (tdims[0] == 3 && (tdims[1] == 2 || tdims[1] == 3)));
DIM_ASSERT(1, idims.elements() > 0);
DIM_ASSERT(1, (idims.ndims() == 2 || idims.ndims() == 3));
const bool perspective = (tdims[1] == 3);
dim_t o0 = odim0, o1 = odim1;
dim_t o2 = idims[2] * tdims[2];
if (odim0 * odim1 == 0) {
o0 = idims[0];
o1 = idims[1];
}
af::dim4 odims(o0, o1, o2, 1);
af_array output = 0;
switch(itype) {
case f32: output = transform<float >(in, tf, odims, method, inverse, perspective); break;
case f64: output = transform<double >(in, tf, odims, method, inverse, perspective); break;
case c32: output = transform<cfloat >(in, tf, odims, method, inverse, perspective); break;
case c64: output = transform<cdouble>(in, tf, odims, method, inverse, perspective); break;
case s32: output = transform<int >(in, tf, odims, method, inverse, perspective); break;
case u32: output = transform<uint >(in, tf, odims, method, inverse, perspective); break;
case s64: output = transform<intl >(in, tf, odims, method, inverse, perspective); break;
case u64: output = transform<uintl >(in, tf, odims, method, inverse, perspective); break;
case s16: output = transform<short >(in, tf, odims, method, inverse, perspective); break;
case u16: output = transform<ushort >(in, tf, odims, method, inverse, perspective); break;
case u8: output = transform<uchar >(in, tf, odims, method, inverse, perspective); break;
case b8: output = transform<char >(in, tf, odims, method, inverse, perspective); break;
default: TYPE_ERROR(1, itype);
}
std::swap(*out,output);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_translate(af_array *out, const af_array in, const float trans0, const float trans1,
const dim_t odim0, const dim_t odim1, const af_interp_type method)
{
try {
static float trans_mat[6] = {1, 0, 0,
0, 1, 0};
trans_mat[2] = trans0;
trans_mat[5] = trans1;
static af::dim4 tdims(3, 2, 1, 1);
af_array t = 0;
AF_CHECK(af_create_array(&t, trans_mat, tdims.ndims(), tdims.get(), f32));
AF_CHECK(af_transform(out, in, t, odim0, odim1, method, true));
AF_CHECK(af_release_array(t));
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_scale(af_array *out, const af_array in, const float scale0, const float scale1,
const dim_t odim0, const dim_t odim1, const af_interp_type method)
{
try {
ArrayInfo i_info = getInfo(in);
af::dim4 idims = i_info.dims();
dim_t _odim0 = odim0, _odim1 = odim1;
float sx, sy;
if(_odim0 == 0 || _odim1 == 0) {
DIM_ASSERT(2, scale0 != 0);
DIM_ASSERT(3, scale1 != 0);
sx = 1.f / scale0, sy = 1.f / scale1;
_odim0 = idims[0] / sx;
_odim1 = idims[1] / sy;
} else if (scale0 == 0 || scale1 == 0) {
DIM_ASSERT(4, odim0 != 0);
DIM_ASSERT(5, odim1 != 0);
sx = idims[0] / (float)_odim0;
sy = idims[1] / (float)_odim1;
} else {
sx = 1.f / scale0, sy = 1.f / scale1;
}
static float trans_mat[6] = {1, 0, 0,
0, 1, 0};
trans_mat[0] = sx;
trans_mat[4] = sy;
static af::dim4 tdims(3, 2, 1, 1);
af_array t = 0;
AF_CHECK(af_create_array(&t, trans_mat, tdims.ndims(), tdims.get(), f32));
AF_CHECK(af_transform(out, in, t, _odim0, _odim1, method, true));
AF_CHECK(af_release_array(t));
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_skew(af_array *out, const af_array in, const float skew0, const float skew1,
const dim_t odim0, const dim_t odim1, const af_interp_type method,
const bool inverse)
{
try {
float tx = std::tan(skew0);
float ty = std::tan(skew1);
static float trans_mat[6] = {1, 0, 0,
0, 1, 0};
trans_mat[1] = ty;
trans_mat[3] = tx;
if(inverse) {
if(tx == 0 || ty == 0) {
trans_mat[1] = tx;
trans_mat[3] = ty;
} else {
//calc_tranform_inverse(trans_mat);
//short cut of calc_transform_inverse
float d = 1.0f / (1.0f - tx * ty);
trans_mat[0] = d;
trans_mat[1] = ty * d;
trans_mat[3] = tx * d;
trans_mat[4] = d;
}
}
static af::dim4 tdims(3, 2, 1, 1);
af_array t = 0;
AF_CHECK(af_create_array(&t, trans_mat, tdims.ndims(), tdims.get(), f32));
AF_CHECK(af_transform(out, in, t, odim0, odim1, method, true));
AF_CHECK(af_release_array(t));
}
CATCHALL;
return AF_SUCCESS;
}