<?
php
//
例子:
$path
=
ROOT
.
'
upload/2009/06/03/124401282315771.
'
;
$pathAll
=
$path
.
'
bmp
'
;
$mi
=
''
;
$mi
=
ImageCreateFromBMP(
$pathAll
); imagejpeg(
$mi
,
$path
.
'
jpg
'
);
//
函数如下:
function
ImageCreateFromBMP(
$filename
) {
//
Ouverture du fichier en mode binaire
if
(
!
$f1
=
fopen
(
$filename
,
"
rb
"
))
return
FALSE
;
//
1 : Chargement des ent�tes FICHIER
$FILE
=
unpack
(
"
vfile_type/Vfile_size/Vreserved/Vbitmap_offset
"
,
fread
(
$f1
,
14
));
if
(
$FILE
[
'
file_type
'
]
!=
19778
)
return
FALSE
;
//
2 : Chargement des ent�tes BMP
$BMP
=
unpack
(
'
Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel
'
.
'
/Vcompression/Vsize_bitmap/Vhoriz_resolution
'
.
'
/Vvert_resolution/Vcolors_used/Vcolors_important
'
,
fread
(
$f1
,
40
));
$BMP
[
'
colors
'
]
=
pow
(
2
,
$BMP
[
'
bits_per_pixel
'
]);
if
(
$BMP
[
'
size_bitmap
'
]
==
0
)
$BMP
[
'
size_bitmap
'
]
=
$FILE
[
'
file_size
'
]
-
$FILE
[
'
bitmap_offset
'
];
$BMP
[
'
bytes_per_pixel
'
]
=
$BMP
[
'
bits_per_pixel
'
]
/
8
;
$BMP
[
'
bytes_per_pixel2
'
]
=
ceil
(
$BMP
[
'
bytes_per_pixel
'
]);
$BMP
[
'
decal
'
]
=
(
$BMP
[
'
width
'
]
*
$BMP
[
'
bytes_per_pixel
'
]
/
4
);
$BMP
[
'
decal
'
]
-=
floor
(
$BMP
[
'
width
'
]
*
$BMP
[
'
bytes_per_pixel
'
]
/
4
);
$BMP
[
'
decal
'
]
=
4
-
(
4
*
$BMP
[
'
decal
'
]);
if
(
$BMP
[
'
decal
'
]
==
4
)
$BMP
[
'
decal
'
]
=
0
;
//
3 : Chargement des couleurs de la palette
$PALETTE
=
array
();
if
(
$BMP
[
'
colors
'
]
<
16777216
) {
$PALETTE
=
unpack
(
'
V
'
.
$BMP
[
'
colors
'
]
,
fread
(
$f1
,
$BMP
[
'
colors
'
]
*
4
)); }
//
4 : Cr�ation de l'image
$IMG
=
fread
(
$f1
,
$BMP
[
'
size_bitmap
'
]);
$VIDE
=
chr
(
0
);
$res
=
imagecreatetruecolor(
$BMP
[
'
width
'
]
,
$BMP
[
'
height
'
]);
$P
=
0
;
$Y
=
$BMP
[
'
height
'
]
-
1
;
while
(
$Y
>=
0
) {
$X
=
0
;
while
(
$X
<
$BMP
[
'
width
'
]) {
if
(
$BMP
[
'
bits_per_pixel
'
]
==
24
)
$COLOR
=
unpack
(
"
V
"
,
substr
(
$IMG
,
$P
,
3
)
.
$VIDE
);
elseif
(
$BMP
[
'
bits_per_pixel
'
]
==
16
) {
$COLOR
=
unpack
(
"
n
"
,
substr
(
$IMG
,
$P
,
2
));
$COLOR
[
1
]
=
$PALETTE
[
$COLOR
[
1
]
+
1
]; }
elseif
(
$BMP
[
'
bits_per_pixel
'
]
==
8
) {
$COLOR
=
unpack
(
"
n
"
,
$VIDE
.
substr
(
$IMG
,
$P
,
1
));
$COLOR
[
1
]
=
$PALETTE
[
$COLOR
[
1
]
+
1
]; }
elseif
(
$BMP
[
'
bits_per_pixel
'
]
==
4
) {
$COLOR
=
unpack
(
"
n
"
,
$VIDE
.
substr
(
$IMG
,
floor
(
$P
)
,
1
));
if
((
$P
*
2
)
%
2
==
0
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
>>
4
) ;
else
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x0F
);
$COLOR
[
1
]
=
$PALETTE
[
$COLOR
[
1
]
+
1
]; }
elseif
(
$BMP
[
'
bits_per_pixel
'
]
==
1
) {
$COLOR
=
unpack
(
"
n
"
,
$VIDE
.
substr
(
$IMG
,
floor
(
$P
)
,
1
));
if
((
$P
*
8
)
%
8
==
0
)
$COLOR
[
1
]
=
$COLOR
[
1
]
>>
7
;
elseif
((
$P
*
8
)
%
8
==
1
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x40
)
>>
6
;
elseif
((
$P
*
8
)
%
8
==
2
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x20
)
>>
5
;
elseif
((
$P
*
8
)
%
8
==
3
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x10
)
>>
4
;
elseif
((
$P
*
8
)
%
8
==
4
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x8
)
>>
3
;
elseif
((
$P
*
8
)
%
8
==
5
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x4
)
>>
2
;
elseif
((
$P
*
8
)
%
8
==
6
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x2
)
>>
1
;
elseif
((
$P
*
8
)
%
8
==
7
)
$COLOR
[
1
]
=
(
$COLOR
[
1
]
&
0x1
);
$COLOR
[
1
]
=
$PALETTE
[
$COLOR
[
1
]
+
1
]; }
else
return
FALSE
; imagesetpixel(
$res
,
$X
,
$Y
,
$COLOR
[
1
]);
$X
++
;
$P
+=
$BMP
[
'
bytes_per_pixel
'
]; }
$Y
--
;
$P
+=
$BMP
[
'
decal
'
]; }
//
Fermeture du fichier
fclose
(
$f1
);
return
$res
; }
?>
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