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dumpers.cc
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Created
Sun, May 5, 13:44
Size
4 KB
Mime Type
text/x-c
Expires
Tue, May 7, 13:44 (2 d)
Engine
blob
Format
Raw Data
Handle
17487209
Attached To
R11201 phpc-2021
dumpers.cc
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/* -------------------------------------------------------------------------- */
#include "dumpers.hh"
#include "grid.hh"
/* -------------------------------------------------------------------------- */
#include <iomanip>
#include <sstream>
#include <fstream>
#include <array>
#include <mpi.h>
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
void
Dumper
::
set_min
(
float
min
)
{
m_min
=
min
;
}
void
Dumper
::
set_max
(
float
max
)
{
m_max
=
max
;
}
float
Dumper
::
min
()
const
{
return
m_min
;
}
float
Dumper
::
max
()
const
{
return
m_max
;
}
/* -------------------------------------------------------------------------- */
void
DumperASCII
::
dump
(
int
step
)
{
std
::
ofstream
fout
;
std
::
stringstream
sfilename
;
sfilename
<<
"output/out_"
<<
std
::
setfill
(
'0'
)
<<
std
::
setw
(
5
)
<<
step
<<
".pgm"
;
fout
.
open
(
sfilename
.
str
());
int
m
=
m_grid
.
m
();
int
n
=
m_grid
.
n
();
fout
<<
"P2"
<<
std
::
endl
<<
"# CREATOR: Poisson program"
<<
std
::
endl
;
fout
<<
m
<<
" "
<<
n
<<
std
::
endl
;
fout
<<
255
<<
std
::
endl
;
for
(
int
i
=
0
;
i
<
m
;
i
++
)
{
for
(
int
j
=
0
;
j
<
n
;
j
++
)
{
int
v
=
255.
*
(
m_grid
(
i
,
j
)
-
m_min
)
/
(
m_max
-
m_min
);
v
=
std
::
min
(
v
,
255
);
fout
<<
v
<<
std
::
endl
;
}
}
}
/* -------------------------------------------------------------------------- */
void
DumperBinary
::
dump
(
int
step
)
{
std
::
ofstream
fout
;
std
::
stringstream
sfilename
;
sfilename
<<
"output/out_"
<<
std
::
setfill
(
'0'
)
<<
std
::
setw
(
5
)
<<
step
<<
".bmp"
;
fout
.
open
(
sfilename
.
str
(),
std
::
ios_base
::
binary
);
int
prank
,
psize
;
MPI_Comm_rank
(
MPI_COMM_WORLD
,
&
prank
);
MPI_Comm_size
(
MPI_COMM_WORLD
,
&
psize
);
int
nghosts
=
((
psize
==
1
)
?
0
:
(
prank
==
0
or
prank
==
psize
-
1
)
?
1
:
2
);
int
h
=
m_grid
.
m
()
-
nghosts
;
int
w
=
m_grid
.
n
();
// remove ghosts at beginning if rank not 0
int
i_start
=
(
prank
==
0
?
0
:
1
);
std
::
vector
<
float
>
buffer
;
if
(
prank
==
0
)
{
buffer
.
resize
(
w
*
w
);
MPI_Gather
(
&
m_grid
(
i_start
,
0
),
h
*
w
,
MPI_FLOAT
,
buffer
.
data
(),
h
*
w
,
MPI_FLOAT
,
0
,
MPI_COMM_WORLD
);
}
else
{
MPI_Gather
(
&
m_grid
(
i_start
,
0
),
h
*
w
,
MPI_FLOAT
,
NULL
,
0
,
MPI_FLOAT
,
0
,
MPI_COMM_WORLD
);
// it prank is not stop here
return
;
}
int
total_h
=
h
*
psize
;
int
row_size
=
3
*
w
;
// if the file width (3*w) is not a multiple of 4 adds enough bytes to make it
// a multiple of 4
int
padding
=
(
4
-
(
row_size
)
%
4
)
%
4
;
row_size
+=
padding
;
int
filesize
=
54
+
(
row_size
)
*
total_h
;
std
::
vector
<
char
>
img
(
row_size
*
total_h
);
std
::
fill
(
img
.
begin
(),
img
.
end
(),
0
);
for
(
int
i
=
0
;
i
<
total_h
;
i
++
)
{
for
(
int
j
=
0
;
j
<
w
;
j
++
)
{
float
v
=
(
buffer
[
i
*
w
+
j
]
-
m_min
)
/
(
m_max
-
m_min
);
float
r
=
v
*
255
;
// Red channel
float
g
=
v
*
255
;
// Green channel
float
b
=
v
*
255
;
// Red channel
r
=
std
::
min
(
r
,
255.f
);
g
=
std
::
min
(
g
,
255.f
);
b
=
std
::
min
(
b
,
255.f
);
img
[
row_size
*
i
+
3
*
j
+
2
]
=
r
;
img
[
row_size
*
i
+
3
*
j
+
1
]
=
g
;
img
[
row_size
*
i
+
3
*
j
+
0
]
=
b
;
}
}
std
::
array
<
char
,
14
>
bmpfileheader
=
{
'B'
,
'M'
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
54
,
0
,
0
,
0
};
std
::
array
<
char
,
40
>
bmpinfoheader
=
{
40
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
1
,
0
,
24
,
0
};
bmpfileheader
[
2
]
=
filesize
;
bmpfileheader
[
3
]
=
filesize
>>
8
;
bmpfileheader
[
4
]
=
filesize
>>
16
;
bmpfileheader
[
5
]
=
filesize
>>
24
;
bmpinfoheader
[
4
]
=
w
;
bmpinfoheader
[
5
]
=
w
>>
8
;
bmpinfoheader
[
6
]
=
w
>>
16
;
bmpinfoheader
[
7
]
=
w
>>
24
;
bmpinfoheader
[
8
]
=
total_h
;
bmpinfoheader
[
9
]
=
total_h
>>
8
;
bmpinfoheader
[
10
]
=
total_h
>>
16
;
bmpinfoheader
[
11
]
=
total_h
>>
24
;
bmpinfoheader
[
20
]
=
(
filesize
-
54
);
bmpinfoheader
[
21
]
=
(
filesize
-
54
)
>>
8
;
bmpinfoheader
[
22
]
=
(
filesize
-
54
)
>>
16
;
bmpinfoheader
[
23
]
=
(
filesize
-
54
)
>>
24
;
fout
.
write
(
bmpfileheader
.
data
(),
14
);
fout
.
write
(
bmpinfoheader
.
data
(),
40
);
fout
.
write
(
img
.
data
(),
total_h
*
row_size
);
}
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