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1c5631a5
Commit
1c5631a5
authored
Feb 01, 2017
by
Anakin
Browse files
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improve image load performance,
can be improved more, but scanline has wrong results
parent
bc5bfc62
Changes
1
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Showing
1 changed file
with
108 additions
and
100 deletions
+108
-100
QtMeshViewer/Header/tga.h
QtMeshViewer/Header/tga.h
+108
-100
No files found.
QtMeshViewer/Header/tga.h
View file @
1c5631a5
...
...
@@ -2,137 +2,145 @@
#include <fstream>
#include <QImage>
#include <QColor>
#include <QVector>
#include <QFile>
#include "Profiler.h"
QImage
loadTga
(
QString
filePath
,
bool
&
success
)
{
TIC
(
"start"
);
QImage
img
;
success
=
true
;
// open the file
std
::
fstream
fsPicture
(
filePath
.
toStdString
().
c_str
(),
std
::
ios
::
in
|
std
::
ios
::
binary
);
QFile
file
(
filePath
);
if
(
!
f
sPicture
.
is_open
(
))
if
(
!
f
ile
.
open
(
QIODevice
::
ReadOnly
))
{
img
=
QImage
(
1
,
1
,
QImage
::
Format_RGB32
);
img
.
fill
(
Qt
::
red
);
success
=
false
;
return
img
;
}
// read in the header
std
::
uint8_t
ui8x18Header
[
19
]
=
{
0
};
fsPicture
.
read
(
reinterpret_cast
<
char
*>
(
&
ui8x18Header
),
sizeof
(
ui8x18Header
)
-
1
);
//get variables
std
::
uint32_t
ui32BpP
;
std
::
uint32_t
ui32Width
;
std
::
uint32_t
ui32Height
;
std
::
uint32_t
ui32IDLength
;
std
::
uint32_t
ui32PicType
;
std
::
uint32_t
ui32PaletteLength
;
std
::
uint32_t
ui32Size
;
// extract all information from header
ui32IDLength
=
ui8x18Header
[
0
];
ui32PicType
=
ui8x18Header
[
2
];
ui32PaletteLength
=
ui8x18Header
[
6
]
*
0x100
+
ui8x18Header
[
5
];
ui32Width
=
ui8x18Header
[
13
]
*
0x100
+
ui8x18Header
[
12
];
ui32Height
=
ui8x18Header
[
15
]
*
0x100
+
ui8x18Header
[
14
];
ui32BpP
=
ui8x18Header
[
16
];
// calculate some more information
ui32Size
=
ui32Width
*
ui32Height
*
ui32BpP
/
8
;
// jump to the data block
fsPicture
.
seekg
(
ui32IDLength
+
ui32PaletteLength
,
std
::
ios_base
::
cur
);
img
=
QImage
(
ui32Width
,
ui32Height
,
QImage
::
Format_RGBA8888
);
// uncompressed
if
(
ui32PicType
==
2
&&
(
ui32BpP
==
24
||
ui32BpP
==
32
))
else
{
std
::
vector
<
std
::
uint8_t
>
vui8Pixels
;
vui8Pixels
.
resize
(
ui32Size
);
fsPicture
.
read
(
reinterpret_cast
<
char
*>
(
vui8Pixels
.
data
()),
ui32Size
);
for
(
unsigned
int
y
=
0
;
y
<
ui32Height
;
y
++
)
// read in the header
quint8
ui8x18Header
[
19
]
=
{
0
};
file
.
read
(
reinterpret_cast
<
char
*>
(
&
ui8x18Header
),
sizeof
(
ui8x18Header
)
-
1
);
//get variables
quint32
ui32BpP
;
quint32
ui32Width
;
quint32
ui32Height
;
quint32
ui32IDLength
;
quint32
ui32PicType
;
quint32
ui32PaletteLength
;
quint32
ui32Size
;
// extract all information from header
ui32IDLength
=
ui8x18Header
[
0
];
ui32PicType
=
ui8x18Header
[
2
];
ui32PaletteLength
=
ui8x18Header
[
6
]
*
0x100
+
ui8x18Header
[
5
];
ui32Width
=
ui8x18Header
[
13
]
*
0x100
+
ui8x18Header
[
12
];
ui32Height
=
ui8x18Header
[
15
]
*
0x100
+
ui8x18Header
[
14
];
ui32BpP
=
ui8x18Header
[
16
];
// calculate some more information
ui32Size
=
ui32Width
*
ui32Height
*
ui32BpP
/
8
;
// jump to the data block
file
.
seek
(
ui32IDLength
+
ui32PaletteLength
+
18
);
img
=
QImage
(
ui32Width
,
ui32Height
,
QImage
::
Format_RGBA8888
);
// uncompressed
if
(
ui32PicType
==
2
&&
(
ui32BpP
==
24
||
ui32BpP
==
32
))
{
for
(
unsigned
int
x
=
0
;
x
<
ui32Width
;
x
++
)
QVector
<
quint8
>
vui8Pixels
;
vui8Pixels
.
resize
(
ui32Size
);
file
.
read
(
reinterpret_cast
<
char
*>
(
vui8Pixels
.
data
()),
ui32Size
);
for
(
unsigned
int
y
=
0
;
y
<
ui32Height
;
y
++
)
{
int
valr
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
+
2
);
int
valg
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
+
1
);
int
valb
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
);
int
vala
=
255
;
if
(
ui32BpP
==
32
)
vala
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
+
3
);
QColor
value
(
valr
,
valg
,
valb
,
vala
);
img
.
setPixel
(
x
,
ui32Width
-
1
-
y
,
value
.
rgba
());
//QRgb* imgLine = (QRgb*)img.scanLine(y);
for
(
unsigned
int
x
=
0
;
x
<
ui32Width
;
x
++
)
{
int
valr
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
+
2
);
int
valg
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
+
1
);
int
valb
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
);
int
vala
=
255
;
if
(
ui32BpP
==
32
)
vala
=
vui8Pixels
.
at
(
y
*
ui32Width
*
ui32BpP
/
8
+
x
*
ui32BpP
/
8
+
3
);
QColor
value
(
valr
,
valg
,
valb
,
vala
);
//imgLine[x] = value.rgba();
img
.
setPixel
(
x
,
ui32Width
-
1
-
y
,
value
.
rgba
());
}
}
}
}
// else if compressed 24 or 32 bit
else
if
(
ui32PicType
==
10
&&
(
ui32BpP
==
24
||
ui32BpP
==
32
))
// compressed
{
std
::
uint8_t
tempChunkHeader
;
std
::
uint8_t
tempData
[
5
];
unsigned
int
tmp_pixelIndex
=
0
;
// else if compressed 24 or 32 bit
else
if
(
ui32PicType
==
10
&&
(
ui32BpP
==
24
||
ui32BpP
==
32
))
// compressed
{
quint8
tempChunkHeader
;
quint8
tempData
[
5
];
unsigned
int
tmp_pixelIndex
=
0
;
do
{
fsPictur
e
.
read
(
reinterpret_cast
<
char
*>
(
&
tempChunkHeader
),
sizeof
(
tempChunkHeader
));
do
{
fil
e
.
read
(
reinterpret_cast
<
char
*>
(
&
tempChunkHeader
),
sizeof
(
tempChunkHeader
));
if
(
tempChunkHeader
>>
7
)
// repeat count
{
// just use the first 7 bits
tempChunkHeader
=
(
uint8_t
(
tempChunkHeader
<<
1
)
>>
1
);
if
(
tempChunkHeader
>>
7
)
// repeat count
{
// just use the first 7 bits
tempChunkHeader
=
(
quint8
(
tempChunkHeader
<<
1
)
>>
1
);
fsPictur
e
.
read
(
reinterpret_cast
<
char
*>
(
&
tempData
),
ui32BpP
/
8
);
fil
e
.
read
(
reinterpret_cast
<
char
*>
(
&
tempData
),
ui32BpP
/
8
);
for
(
int
i
=
0
;
i
<=
tempChunkHeader
;
i
++
)
{
QColor
color
;
for
(
int
i
=
0
;
i
<=
tempChunkHeader
;
i
++
)
{
QColor
color
;
if
(
ui32BpP
==
32
)
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
tempData
[
3
]));
else
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
255
));
if
(
ui32BpP
==
32
)
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
tempData
[
3
]));
else
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
255
));
img
.
setPixel
(
tmp_pixelIndex
%
ui32Width
,
ui32Height
-
1
-
(
tmp_pixelIndex
/
ui32Width
),
color
.
rgba
());
tmp_pixelIndex
++
;
img
.
setPixel
(
tmp_pixelIndex
%
ui32Width
,
ui32Height
-
1
-
(
tmp_pixelIndex
/
ui32Width
),
color
.
rgba
());
tmp_pixelIndex
++
;
}
}
}
else
// data count
{
// just use the first 7 bits
tempChunkHeader
=
(
uint8_t
(
tempChunkHeader
<<
1
)
>>
1
);
for
(
int
i
=
0
;
i
<=
tempChunkHeader
;
i
++
)
else
// data count
{
fsPicture
.
read
(
reinterpret_cast
<
char
*>
(
&
tempData
),
ui32BpP
/
8
);
// just use the first 7 bits
tempChunkHeader
=
(
uint8_t
(
tempChunkHeader
<<
1
)
>>
1
);
QColor
color
;
for
(
int
i
=
0
;
i
<=
tempChunkHeader
;
i
++
)
{
file
.
read
(
reinterpret_cast
<
char
*>
(
&
tempData
),
ui32BpP
/
8
);
if
(
ui32BpP
==
32
)
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
tempData
[
3
]));
else
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
255
));
QColor
color
;
img
.
setPixel
(
tmp_pixelIndex
%
ui32Width
,
ui32Height
-
1
-
(
tmp_pixelIndex
/
ui32Width
),
color
.
rgba
());
tmp_pixelIndex
++
;
if
(
ui32BpP
==
32
)
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
tempData
[
3
]));
else
color
.
setRgba
(
qRgba
(
tempData
[
2
],
tempData
[
1
],
tempData
[
0
],
255
));
img
.
setPixel
(
tmp_pixelIndex
%
ui32Width
,
ui32Height
-
1
-
(
tmp_pixelIndex
/
ui32Width
),
color
.
rgba
());
tmp_pixelIndex
++
;
}
}
}
}
while
(
tmp_pixelIndex
<
(
ui32Width
*
ui32Height
));
}
// not useable format
else
{
fsPicture
.
close
();
success
=
false
;
return
img
;
}
while
(
tmp_pixelIndex
<
(
ui32Width
*
ui32Height
));
}
// not useable format
else
{
success
=
false
;
}
}
fsPicture
.
close
();
success
=
true
;
TOC
(
"end"
);
if
(
file
.
isOpen
())
file
.
close
();
return
img
;
}
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