469,338 Members | 8,430 Online
Bytes | Developer Community
New Post

Home Posts Topics Members FAQ

Post your question to a community of 469,338 developers. It's quick & easy.

imagecreatefrombmp()

Someone posted a function to implement imagecreatefrombmp()but it
fails in imagecreatedfromgd() in my test. Can the author check to see
if theres a typo? Its very useful if it will work!

Brian
"Erwin Bon" <er***@verkerk.nl> wrote in message news:<3f**********************@news.euronet.nl>...
Hello,

I need to be able to read windows bitmap files (*.bmp) into the GD-functions
in order to create a jpg-file from it. Is such a thing possible. I seem te
be unable to find the required functions.

Hope you can help me.

Regards, Erwin


The GD library doesn't support .BMP files for some reason. I've
written a function that converts .BMP files to .GD, a very simple
format that GD uses.

The following code implements imagecreatefrombmp(). It first convert
the BMP to GD, saving it to a temporary location, then open the image
using imagecreatefromgd().
<?

function ConvertBMP2GD($src, $dest = false) {
if(!($src_f = fopen($src, "rb"))) {
return false;
}
if(!($dest_f = fopen($dest, "wb"))) {
return false;
}
$header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f,
14));
$info = unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vncolor/Vimportant",
fread($src_f, 40));

extract($info);
extract($header);

if($type != 0x4D42) { // signature "BM"
return false;
}

$palette_size = $offset - 54;
$ncolor = $palette_size / 4;
$gd_header = "";
// true-color vs. palette
$gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
$gd_header .= pack("n2", $width, $height);
$gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
if($palette_size) {
$gd_header .= pack("n", $ncolor);
}
// no transparency
$gd_header .= "\xFF\xFF\xFF\xFF";

fwrite($dest_f, $gd_header);

if($palette_size) {
$palette = fread($src_f, $palette_size);
$gd_palette = "";
$j = 0;
while($j < $palette_size) {
$b = $palette{$j++};
$g = $palette{$j++};
$r = $palette{$j++};
$a = $palette{$j++};
$gd_palette .= "$r$g$b$a";
}
$gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
fwrite($dest_f, $gd_palette);
}

$scan_line_size = (($bits * $width) + 7) >> 3;
$scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size &
0x03) : 0;

for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
// BMP stores scan lines starting from bottom
fseek($src_f, $offset + (($scan_line_size + $scan_line_align) *
$l));
$scan_line = fread($src_f, $scan_line_size);
if($bits == 24) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$b = $scan_line{$j++};
$g = $scan_line{$j++};
$r = $scan_line{$j++};
$gd_scan_line .= "\x00$r$g$b";
}
}
else if($bits == 8) {
$gd_scan_line = $scan_line;
}
else if($bits == 4) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr($byte >> 4);
$p2 = chr($byte & 0x0F);
$gd_scan_line .= "$p1$p2";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}
else if($bits == 1) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr((int) (($byte & 0x80) != 0));
$p2 = chr((int) (($byte & 0x40) != 0));
$p3 = chr((int) (($byte & 0x20) != 0));
$p4 = chr((int) (($byte & 0x10) != 0));
$p5 = chr((int) (($byte & 0x08) != 0));
$p6 = chr((int) (($byte & 0x04) != 0));
$p7 = chr((int) (($byte & 0x02) != 0));
$p8 = chr((int) (($byte & 0x01) != 0));
$gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}

fwrite($dest_f, $gd_scan_line);
}
fclose($src_f);
fclose($dest_f);
return true;
}

function imagecreatefrombmp($filename) {
$tmp_name = tempnam("/tmp", "GD");
if(ConvertBMP2GD($filename, $tmp_name)) {
$img = imagecreatefromgd($tmp_name);
unlink($tmp_name);
return $img;
} return false;
}

$img = imagecreatefrombmp("test24bit.bmp");
imagejpeg($img, "test.jpg");

?>
<img src="test.jpg">
Jul 17 '05 #1
4 23021
Make sure you have GD2 extension enabled.

Uzytkownik "Brian" <br********@aol.com> napisal w wiadomosci
news:d0**************************@posting.google.c om...
Someone posted a function to implement imagecreatefrombmp()but it
fails in imagecreatedfromgd() in my test. Can the author check to see
if theres a typo? Its very useful if it will work!

Brian
"Erwin Bon" <er***@verkerk.nl> wrote in message news:<3f**********************@news.euronet.nl>...
Hello,

I need to be able to read windows bitmap files (*.bmp) into the GD-functions in order to create a jpg-file from it. Is such a thing possible. I seem te be unable to find the required functions.

Hope you can help me.

Regards, Erwin


The GD library doesn't support .BMP files for some reason. I've
written a function that converts .BMP files to .GD, a very simple
format that GD uses.

The following code implements imagecreatefrombmp(). It first convert
the BMP to GD, saving it to a temporary location, then open the image
using imagecreatefromgd().
<?

function ConvertBMP2GD($src, $dest = false) {
if(!($src_f = fopen($src, "rb"))) {
return false;
}
if(!($dest_f = fopen($dest, "wb"))) {
return false;
}
$header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f,
14));
$info =

unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyr
es/Vncolor/Vimportant", fread($src_f, 40));

extract($info);
extract($header);

if($type != 0x4D42) { // signature "BM"
return false;
}

$palette_size = $offset - 54;
$ncolor = $palette_size / 4;
$gd_header = "";
// true-color vs. palette
$gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
$gd_header .= pack("n2", $width, $height);
$gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
if($palette_size) {
$gd_header .= pack("n", $ncolor);
}
// no transparency
$gd_header .= "\xFF\xFF\xFF\xFF";

fwrite($dest_f, $gd_header);

if($palette_size) {
$palette = fread($src_f, $palette_size);
$gd_palette = "";
$j = 0;
while($j < $palette_size) {
$b = $palette{$j++};
$g = $palette{$j++};
$r = $palette{$j++};
$a = $palette{$j++};
$gd_palette .= "$r$g$b$a";
}
$gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
fwrite($dest_f, $gd_palette);
}

$scan_line_size = (($bits * $width) + 7) >> 3;
$scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size &
0x03) : 0;

for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
// BMP stores scan lines starting from bottom
fseek($src_f, $offset + (($scan_line_size + $scan_line_align) *
$l));
$scan_line = fread($src_f, $scan_line_size);
if($bits == 24) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$b = $scan_line{$j++};
$g = $scan_line{$j++};
$r = $scan_line{$j++};
$gd_scan_line .= "\x00$r$g$b";
}
}
else if($bits == 8) {
$gd_scan_line = $scan_line;
}
else if($bits == 4) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr($byte >> 4);
$p2 = chr($byte & 0x0F);
$gd_scan_line .= "$p1$p2";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}
else if($bits == 1) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr((int) (($byte & 0x80) != 0));
$p2 = chr((int) (($byte & 0x40) != 0));
$p3 = chr((int) (($byte & 0x20) != 0));
$p4 = chr((int) (($byte & 0x10) != 0));
$p5 = chr((int) (($byte & 0x08) != 0));
$p6 = chr((int) (($byte & 0x04) != 0));
$p7 = chr((int) (($byte & 0x02) != 0));
$p8 = chr((int) (($byte & 0x01) != 0));
$gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}

fwrite($dest_f, $gd_scan_line);
}
fclose($src_f);
fclose($dest_f);
return true;
}

function imagecreatefrombmp($filename) {
$tmp_name = tempnam("/tmp", "GD");
if(ConvertBMP2GD($filename, $tmp_name)) {
$img = imagecreatefromgd($tmp_name);
unlink($tmp_name);
return $img;
} return false;
}

$img = imagecreatefrombmp("test24bit.bmp");
imagejpeg($img, "test.jpg");

?>
<img src="test.jpg">

Jul 17 '05 #2
I am running 4.3.0 with the extensions enabled. It fails on
imagecreatefromgd(), so its not creating a valid gd. I cut and pasted
it directly and ran it as is.

Brian
"Chung Leong" <ch***********@hotmail.com> wrote in message news:<Av********************@comcast.com>...
Make sure you have GD2 extension enabled.

Uzytkownik "Brian" <br********@aol.com> napisal w wiadomosci
news:d0**************************@posting.google.c om...
Someone posted a function to implement imagecreatefrombmp()but it
fails in imagecreatedfromgd() in my test. Can the author check to see
if theres a typo? Its very useful if it will work!

Brian
"Erwin Bon" <er***@verkerk.nl> wrote in message

news:<3f**********************@news.euronet.nl>...
Hello,

I need to be able to read windows bitmap files (*.bmp) into the GD-functions in order to create a jpg-file from it. Is such a thing possible. I seem te be unable to find the required functions.

Hope you can help me.

Regards, Erwin


The GD library doesn't support .BMP files for some reason. I've
written a function that converts .BMP files to .GD, a very simple
format that GD uses.

The following code implements imagecreatefrombmp(). It first convert
the BMP to GD, saving it to a temporary location, then open the image
using imagecreatefromgd().
<?

function ConvertBMP2GD($src, $dest = false) {
if(!($src_f = fopen($src, "rb"))) {
return false;
}
if(!($dest_f = fopen($dest, "wb"))) {
return false;
}
$header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f,
14));
$info =

unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyr
es/Vncolor/Vimportant",
fread($src_f, 40));

extract($info);
extract($header);

if($type != 0x4D42) { // signature "BM"
return false;
}

$palette_size = $offset - 54;
$ncolor = $palette_size / 4;
$gd_header = "";
// true-color vs. palette
$gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
$gd_header .= pack("n2", $width, $height);
$gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
if($palette_size) {
$gd_header .= pack("n", $ncolor);
}
// no transparency
$gd_header .= "\xFF\xFF\xFF\xFF";

fwrite($dest_f, $gd_header);

if($palette_size) {
$palette = fread($src_f, $palette_size);
$gd_palette = "";
$j = 0;
while($j < $palette_size) {
$b = $palette{$j++};
$g = $palette{$j++};
$r = $palette{$j++};
$a = $palette{$j++};
$gd_palette .= "$r$g$b$a";
}
$gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
fwrite($dest_f, $gd_palette);
}

$scan_line_size = (($bits * $width) + 7) >> 3;
$scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size &
0x03) : 0;

for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
// BMP stores scan lines starting from bottom
fseek($src_f, $offset + (($scan_line_size + $scan_line_align) *
$l));
$scan_line = fread($src_f, $scan_line_size);
if($bits == 24) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$b = $scan_line{$j++};
$g = $scan_line{$j++};
$r = $scan_line{$j++};
$gd_scan_line .= "\x00$r$g$b";
}
}
else if($bits == 8) {
$gd_scan_line = $scan_line;
}
else if($bits == 4) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr($byte >> 4);
$p2 = chr($byte & 0x0F);
$gd_scan_line .= "$p1$p2";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}
else if($bits == 1) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr((int) (($byte & 0x80) != 0));
$p2 = chr((int) (($byte & 0x40) != 0));
$p3 = chr((int) (($byte & 0x20) != 0));
$p4 = chr((int) (($byte & 0x10) != 0));
$p5 = chr((int) (($byte & 0x08) != 0));
$p6 = chr((int) (($byte & 0x04) != 0));
$p7 = chr((int) (($byte & 0x02) != 0));
$p8 = chr((int) (($byte & 0x01) != 0));
$gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}

fwrite($dest_f, $gd_scan_line);
}
fclose($src_f);
fclose($dest_f);
return true;
}

function imagecreatefrombmp($filename) {
$tmp_name = tempnam("/tmp", "GD");
if(ConvertBMP2GD($filename, $tmp_name)) {
$img = imagecreatefromgd($tmp_name);
unlink($tmp_name);
return $img;
} return false;
}

$img = imagecreatefrombmp("test24bit.bmp");
imagejpeg($img, "test.jpg");

?>
<img src="test.jpg">

Jul 17 '05 #3
Email me the bmp file and I'll take a look. It worked fine with my test
image (256 colors).

Uzytkownik "Brian" <br********@aol.com> napisal w wiadomosci
news:d0**************************@posting.google.c om...
I am running 4.3.0 with the extensions enabled. It fails on
imagecreatefromgd(), so its not creating a valid gd. I cut and pasted
it directly and ran it as is.

Brian
"Chung Leong" <ch***********@hotmail.com> wrote in message

news:<Av********************@comcast.com>...
Make sure you have GD2 extension enabled.

Uzytkownik "Brian" <br********@aol.com> napisal w wiadomosci
news:d0**************************@posting.google.c om...
Someone posted a function to implement imagecreatefrombmp()but it
fails in imagecreatedfromgd() in my test. Can the author check to see
if theres a typo? Its very useful if it will work!

Brian
"Erwin Bon" <er***@verkerk.nl> wrote in message

news:<3f**********************@news.euronet.nl>...
> Hello,
>
> I need to be able to read windows bitmap files (*.bmp) into the

GD-functions
> in order to create a jpg-file from it. Is such a thing possible. I
seem te
> be unable to find the required functions.
>
> Hope you can help me.
>
> Regards, Erwin

The GD library doesn't support .BMP files for some reason. I've
written a function that converts .BMP files to .GD, a very simple
format that GD uses.

The following code implements imagecreatefrombmp(). It first convert
the BMP to GD, saving it to a temporary location, then open the image
using imagecreatefromgd().
<?

function ConvertBMP2GD($src, $dest = false) {
if(!($src_f = fopen($src, "rb"))) {
return false;
}
if(!($dest_f = fopen($dest, "wb"))) {
return false;
}
$header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f,
14));
$info =

unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyr es/Vncolor/Vimportant",
fread($src_f, 40));

extract($info);
extract($header);

if($type != 0x4D42) { // signature "BM"
return false;
}

$palette_size = $offset - 54;
$ncolor = $palette_size / 4;
$gd_header = "";
// true-color vs. palette
$gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
$gd_header .= pack("n2", $width, $height);
$gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
if($palette_size) {
$gd_header .= pack("n", $ncolor);
}
// no transparency
$gd_header .= "\xFF\xFF\xFF\xFF";

fwrite($dest_f, $gd_header);

if($palette_size) {
$palette = fread($src_f, $palette_size);
$gd_palette = "";
$j = 0;
while($j < $palette_size) {
$b = $palette{$j++};
$g = $palette{$j++};
$r = $palette{$j++};
$a = $palette{$j++};
$gd_palette .= "$r$g$b$a";
}
$gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
fwrite($dest_f, $gd_palette);
}

$scan_line_size = (($bits * $width) + 7) >> 3;
$scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size &
0x03) : 0;

for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
// BMP stores scan lines starting from bottom
fseek($src_f, $offset + (($scan_line_size + $scan_line_align) *
$l));
$scan_line = fread($src_f, $scan_line_size);
if($bits == 24) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$b = $scan_line{$j++};
$g = $scan_line{$j++};
$r = $scan_line{$j++};
$gd_scan_line .= "\x00$r$g$b";
}
}
else if($bits == 8) {
$gd_scan_line = $scan_line;
}
else if($bits == 4) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr($byte >> 4);
$p2 = chr($byte & 0x0F);
$gd_scan_line .= "$p1$p2";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}
else if($bits == 1) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr((int) (($byte & 0x80) != 0));
$p2 = chr((int) (($byte & 0x40) != 0));
$p3 = chr((int) (($byte & 0x20) != 0));
$p4 = chr((int) (($byte & 0x10) != 0));
$p5 = chr((int) (($byte & 0x08) != 0));
$p6 = chr((int) (($byte & 0x04) != 0));
$p7 = chr((int) (($byte & 0x02) != 0));
$p8 = chr((int) (($byte & 0x01) != 0));
$gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}

fwrite($dest_f, $gd_scan_line);
}
fclose($src_f);
fclose($dest_f);
return true;
}

function imagecreatefrombmp($filename) {
$tmp_name = tempnam("/tmp", "GD");
if(ConvertBMP2GD($filename, $tmp_name)) {
$img = imagecreatefromgd($tmp_name);
unlink($tmp_name);
return $img;
} return false;
}

$img = imagecreatefrombmp("test24bit.bmp");
imagejpeg($img, "test.jpg");

?>
<img src="test.jpg">

Jul 17 '05 #4
Just to follow up, after upgrading to 4.3.4 it started working. So the
code apparently doesnt work on 4.3.0.

thanks,

Brian

"Chung Leong" <ch***********@hotmail.com> wrote in message news:<j6********************@comcast.com>...
Email me the bmp file and I'll take a look. It worked fine with my test
image (256 colors).

Uzytkownik "Brian" <br********@aol.com> napisal w wiadomosci
news:d0**************************@posting.google.c om...
I am running 4.3.0 with the extensions enabled. It fails on
imagecreatefromgd(), so its not creating a valid gd. I cut and pasted
it directly and ran it as is.

Brian
"Chung Leong" <ch***********@hotmail.com> wrote in message

news:<Av********************@comcast.com>...
Make sure you have GD2 extension enabled.

Uzytkownik "Brian" <br********@aol.com> napisal w wiadomosci
news:d0**************************@posting.google.c om...
> Someone posted a function to implement imagecreatefrombmp()but it
> fails in imagecreatedfromgd() in my test. Can the author check to see
> if theres a typo? Its very useful if it will work!
>
> Brian
>
>
> "Erwin Bon" <er***@verkerk.nl> wrote in message news:<3f**********************@news.euronet.nl>... > > Hello,
> >
> > I need to be able to read windows bitmap files (*.bmp) into the GD-functions > > in order to create a jpg-file from it. Is such a thing possible. I seem
te > > be unable to find the required functions.
> >
> > Hope you can help me.
> >
> > Regards, Erwin
>
> The GD library doesn't support .BMP files for some reason. I've
> written a function that converts .BMP files to .GD, a very simple
> format that GD uses.
>
> The following code implements imagecreatefrombmp(). It first convert
> the BMP to GD, saving it to a temporary location, then open the image
> using imagecreatefromgd().
>
>
> <?
>
> function ConvertBMP2GD($src, $dest = false) {
> if(!($src_f = fopen($src, "rb"))) {
> return false;
> }
> if(!($dest_f = fopen($dest, "wb"))) {
> return false;
> }
> $header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f,
> 14));
> $info =
unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyr es/Vncolor/Vimportant",
> fread($src_f, 40));
>
> extract($info);
> extract($header);
>
> if($type != 0x4D42) { // signature "BM"
> return false;
> }
>
> $palette_size = $offset - 54;
> $ncolor = $palette_size / 4;
> $gd_header = "";
> // true-color vs. palette
> $gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
> $gd_header .= pack("n2", $width, $height);
> $gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
> if($palette_size) {
> $gd_header .= pack("n", $ncolor);
> }
> // no transparency
> $gd_header .= "\xFF\xFF\xFF\xFF";
>
> fwrite($dest_f, $gd_header);
>
> if($palette_size) {
> $palette = fread($src_f, $palette_size);
> $gd_palette = "";
> $j = 0;
> while($j < $palette_size) {
> $b = $palette{$j++};
> $g = $palette{$j++};
> $r = $palette{$j++};
> $a = $palette{$j++};
> $gd_palette .= "$r$g$b$a";
> }
> $gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
> fwrite($dest_f, $gd_palette);
> }
>
> $scan_line_size = (($bits * $width) + 7) >> 3;
> $scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size &
> 0x03) : 0;
>
> for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
> // BMP stores scan lines starting from bottom
> fseek($src_f, $offset + (($scan_line_size + $scan_line_align) *
> $l));
> $scan_line = fread($src_f, $scan_line_size);
> if($bits == 24) {
> $gd_scan_line = "";
> $j = 0;
> while($j < $scan_line_size) {
> $b = $scan_line{$j++};
> $g = $scan_line{$j++};
> $r = $scan_line{$j++};
> $gd_scan_line .= "\x00$r$g$b";
> }
> }
> else if($bits == 8) {
> $gd_scan_line = $scan_line;
> }
> else if($bits == 4) {
> $gd_scan_line = "";
> $j = 0;
> while($j < $scan_line_size) {
> $byte = ord($scan_line{$j++});
> $p1 = chr($byte >> 4);
> $p2 = chr($byte & 0x0F);
> $gd_scan_line .= "$p1$p2";
> } $gd_scan_line = substr($gd_scan_line, 0, $width);
> }
> else if($bits == 1) {
> $gd_scan_line = "";
> $j = 0;
> while($j < $scan_line_size) {
> $byte = ord($scan_line{$j++});
> $p1 = chr((int) (($byte & 0x80) != 0));
> $p2 = chr((int) (($byte & 0x40) != 0));
> $p3 = chr((int) (($byte & 0x20) != 0));
> $p4 = chr((int) (($byte & 0x10) != 0));
> $p5 = chr((int) (($byte & 0x08) != 0));
> $p6 = chr((int) (($byte & 0x04) != 0));
> $p7 = chr((int) (($byte & 0x02) != 0));
> $p8 = chr((int) (($byte & 0x01) != 0));
> $gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8";
> } $gd_scan_line = substr($gd_scan_line, 0, $width);
> }
>
> fwrite($dest_f, $gd_scan_line);
> }
> fclose($src_f);
> fclose($dest_f);
> return true;
> }
>
> function imagecreatefrombmp($filename) {
> $tmp_name = tempnam("/tmp", "GD");
> if(ConvertBMP2GD($filename, $tmp_name)) {
> $img = imagecreatefromgd($tmp_name);
> unlink($tmp_name);
> return $img;
> } return false;
> }
>
> $img = imagecreatefrombmp("test24bit.bmp");
> imagejpeg($img, "test.jpg");
>
> ?>
> <img src="test.jpg">

Jul 17 '05 #5

This discussion thread is closed

Replies have been disabled for this discussion.

Similar topics

2 posts views Thread by Erwin Bon | last post: by
1 post views Thread by Perttu Pulkkinen | last post: by
3 posts views Thread by Ken | last post: by
1 post views Thread by Chung Leong | last post: by
1 post views Thread by Mitul | last post: by
8 posts views Thread by brainflakes.org | last post: by
4 posts views Thread by mingkin | last post: by
1 post views Thread by CARIGAR | last post: by
reply views Thread by zhoujie | last post: by
reply views Thread by suresh191 | last post: by
1 post views Thread by haryvincent176 | last post: by
By using this site, you agree to our Privacy Policy and Terms of Use.