Re[4]: [PHP] cropping an image script
Hi,
Friday, March 14, 2003, 7:20:10 AM, you wrote:
AR> I'm getting a fatal error on the following script using
AR> MS Win 98 / Apache Server / PHP 4.1.1. / php_gd.dll
AR> Fatal error: imagecreatetruecolor(): requires GD 2.0 or later in
AR> c:\apache\htdocs\testphoto.php on line 6
AR> Is there a workaround to this function so that I can crop part of the source
AR> .jpeg?
AR> Thank you.
AR> Tony Ritter
AR> ...
AR> function
AR> im_crop($cropX,$cropY,$cropH,$cropW,$source,$destination,$type='jpeg') {
AR> // source image
AR> $sim = ImageCreateFromJPEG($source);
AR> // create the destination image
AR> $dim = imagecreatetruecolor($cropW, $cropH);
AR> // pass trought pixles of source image
AR> for ( $i=$cropY; $i<($cropY+$cropH); $i++ ) {
AR> for ( $j=$cropX; $j<($cropX+$cropW); $j++ ) {
AR>$pixel = imagecolorat($sim, $j, $i);
AR> imagesetpixel($dim, $j-$cropX, $i-$cropY, $pixel);
AR> }
AR> }
AR> imagedestroy($sim);
AR> ImageJPEG($dim, $destination);
AR> imagedestroy($dim);
AR> }
AR> // example
AR> im_crop(0,0,75,75,'1_data.jpeg','2_data.jpeg','jpeg');
?>>
AR>
AR> Fatal error: imagecreatetruecolor(): requires GD 2.0 or later in
AR> c:\apache\htdocs\testphoto.php on line 6
AR> ---
AR> [This E-mail scanned for viruses by gonefishingguideservice.com]
What happens if you use imagecreate() ?
--
regards,
Tom
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Re: Re[2]: [PHP] cropping an image script
I'm getting a fatal error on the following script using MS Win 98 / Apache Server / PHP 4.1.1. / php_gd.dll Fatal error: imagecreatetruecolor(): requires GD 2.0 or later in c:\apache\htdocs\testphoto.php on line 6 Is there a workaround to this function so that I can crop part of the source .jpeg? Thank you. Tony Ritter ... Fatal error: imagecreatetruecolor(): requires GD 2.0 or later in c:\apache\htdocs\testphoto.php on line 6 --- [This E-mail scanned for viruses by gonefishingguideservice.com] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re[2]: [PHP] cropping an image script
Hi,
Friday, March 14, 2003, 3:49:03 AM, you wrote:
TR> Hi,
TR> Friday, March 14, 2003, 2:07:28 AM, you wrote:
AR>> In the following php script, the function takes the original file and crops
AR>> to the destination file.
AR>> I've ran the script using a .png file and a .jpg file.
AR>> The .png works fine whereas the .jpeg file returns only part of the image
AR>> along with a blue rectangle.
AR>> For instance - where the original image is a 200 x 300 jpeg called:
AR>> 1_data.jpeg
AR>> and the destination iamge is 75x75 called:
AR>> 2_data.jpeg
AR>> and starting at the x,y coordinates of 0,0 - the script returns a 75x 75
AR>> file but only a sliver of the .jpg image is within the 75x75 blue square.
AR>> Any help will be of assistance.
AR>> Thank you.
AR>> Tony Ritter
AR>>
AR>> The following is the php cropping script (with author credit):
AR>> > //
AR>> //image crop fuction . [EMAIL PROTECTED]
AR>> //info at http://obala.net/en
AR>> //
AR>> // Yes the proses could be executed with imagecopyresized build-in function
AR>> // but with this function you get the idea of how an image color set is
AR>> constructed
AR>> //
AR>> // $cropX = source starting X
AR>> // $cropY = source starting Y
AR>> // $cropW = crop weigth
AR>> // $cropH = crop heigh
AR>> // $source = source filename
AR>> // $destination = destination filename
AR>> // $type = image type
AR>> function
AR>> im_crop($cropX,$cropY,$cropH,$cropW,$source,$destination,$type='jpeg') {
AR>> // switch known types and open source image
AR>> switch ($type) {
AR>> case 'wbmp': $sim = ImageCreateFromWBMP($source); break;
AR>> case 'gif': $sim = ImageCreateFromGIF($source); break;
AR>> case 'png': $sim = ImageCreateFromPNG($source); break;
AR>> default: $sim = ImageCreateFromJPEG($source); break;
AR>> }
AR>> // create the destination image
AR>> $dim = imagecreate($cropW, $cropH);
AR>> // pass trought pixles of source image
AR>> for ( $i=$cropY; $i<($cropY+$cropH); $i++ ) {
AR>> for ( $j=$cropX; $j<($cropX+$cropW); $j++ ) {
AR>> // get RGB color info about a pixel in the source image
AR>> $color = imagecolorsforindex($sim, imagecolorat($sim, $j, $i));
AR>> // insert the color in the color index of the new image
AR>> $index = ImageColorAllocate($dim, $color['red'],
AR>> $color['green'], $color['blue']);
AR>> // plots a pixel in the new image with that color
AR>> imagesetpixel($dim, $j-$cropX, $i-$cropY, $index);
AR>> }
AR>> }
AR>> // whe dont need the sorce image anymore
AR>> imagedestroy($sim);
AR>> // switch known types and save
AR>> switch ($type) {
AR>> case 'wbmp': ImageWBMP($dim, $destination); break;
AR>> case 'gif': ImageGIF($dim, $destination); break;
AR>> case 'png': ImagePNG($dim, $destination); break;
AR>> default: ImageJPEG($dim, $destination); break;
AR>> }
AR>> // free the used space of the source image
AR>> imagedestroy($dim);
AR>> }
AR>> // example
AR>> im_crop(0,0,75,75,'1_data.jpeg','2_data.jpeg','jpeg');
?>>>
TR> With jpegs you need to use $im2 = imagecreatetruecolor($x,$y)
TR> and just write the pixel back using imagesetpixel($im, $x, $y, $p);
TR> like this:
TR> $im =imagecreatefromjpeg($filename);
TR> $dim = imagecreatetruecolor($cropW, $cropH);
TR> for ( $i=$cropY; $i<($cropY+$cropH); $i++ ) {
TR> for ( $j=$cropX; $j<($cropX+$cropW); $j++ ) {
TR> $pixel = imagecolorat($im, $x, $y);
TR> imagesetpixel($dim, $j-$cropX, $i-$cropY, $pixel);
TR> }
TR> }
TR> As it is true colour no need to use indexes.
TR> --
TR> regards,
TR> Tom
Guess that should be imagecolorat($sim, $j, $i);
:)
--
regards,
Tom
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Re: [PHP] cropping an image script
Hi,
Friday, March 14, 2003, 2:07:28 AM, you wrote:
AR> In the following php script, the function takes the original file and crops
AR> to the destination file.
AR> I've ran the script using a .png file and a .jpg file.
AR> The .png works fine whereas the .jpeg file returns only part of the image
AR> along with a blue rectangle.
AR> For instance - where the original image is a 200 x 300 jpeg called:
AR> 1_data.jpeg
AR> and the destination iamge is 75x75 called:
AR> 2_data.jpeg
AR> and starting at the x,y coordinates of 0,0 - the script returns a 75x 75
AR> file but only a sliver of the .jpg image is within the 75x75 blue square.
AR> Any help will be of assistance.
AR> Thank you.
AR> Tony Ritter
AR>
AR> The following is the php cropping script (with author credit):
AR> //
AR> //image crop fuction . [EMAIL PROTECTED]
AR> //info at http://obala.net/en
AR> //
AR> // Yes the proses could be executed with imagecopyresized build-in function
AR> // but with this function you get the idea of how an image color set is
AR> constructed
AR> //
AR> // $cropX = source starting X
AR> // $cropY = source starting Y
AR> // $cropW = crop weigth
AR> // $cropH = crop heigh
AR> // $source = source filename
AR> // $destination = destination filename
AR> // $type = image type
AR> function
AR> im_crop($cropX,$cropY,$cropH,$cropW,$source,$destination,$type='jpeg') {
AR> // switch known types and open source image
AR> switch ($type) {
AR> case 'wbmp': $sim = ImageCreateFromWBMP($source); break;
AR> case 'gif': $sim = ImageCreateFromGIF($source); break;
AR> case 'png': $sim = ImageCreateFromPNG($source); break;
AR> default: $sim = ImageCreateFromJPEG($source); break;
AR> }
AR> // create the destination image
AR> $dim = imagecreate($cropW, $cropH);
AR> // pass trought pixles of source image
AR> for ( $i=$cropY; $i<($cropY+$cropH); $i++ ) {
AR> for ( $j=$cropX; $j<($cropX+$cropW); $j++ ) {
AR> // get RGB color info about a pixel in the source image
AR> $color = imagecolorsforindex($sim, imagecolorat($sim, $j, $i));
AR> // insert the color in the color index of the new image
AR> $index = ImageColorAllocate($dim, $color['red'],
AR> $color['green'], $color['blue']);
AR> // plots a pixel in the new image with that color
AR> imagesetpixel($dim, $j-$cropX, $i-$cropY, $index);
AR> }
AR> }
AR> // whe dont need the sorce image anymore
AR> imagedestroy($sim);
AR> // switch known types and save
AR> switch ($type) {
AR> case 'wbmp': ImageWBMP($dim, $destination); break;
AR> case 'gif': ImageGIF($dim, $destination); break;
AR> case 'png': ImagePNG($dim, $destination); break;
AR> default: ImageJPEG($dim, $destination); break;
AR> }
AR> // free the used space of the source image
AR> imagedestroy($dim);
AR> }
AR> // example
AR> im_crop(0,0,75,75,'1_data.jpeg','2_data.jpeg','jpeg');
?>>
With jpegs you need to use $im2 = imagecreatetruecolor($x,$y)
and just write the pixel back using imagesetpixel($im, $x, $y, $p);
like this:
$im =imagecreatefromjpeg($filename);
$dim = imagecreatetruecolor($cropW, $cropH);
for ( $i=$cropY; $i<($cropY+$cropH); $i++ ) {
for ( $j=$cropX; $j<($cropX+$cropW); $j++ ) {
$pixel = imagecolorat($im, $x, $y);
imagesetpixel($dim, $j-$cropX, $i-$cropY, $pixel);
}
}
As it is true colour no need to use indexes.
--
regards,
Tom
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] cropping an image script
In the following php script, the function takes the original file and crops
to the destination file.
I've ran the script using a .png file and a .jpg file.
The .png works fine whereas the .jpeg file returns only part of the image
along with a blue rectangle.
For instance - where the original image is a 200 x 300 jpeg called:
1_data.jpeg
and the destination iamge is 75x75 called:
2_data.jpeg
and starting at the x,y coordinates of 0,0 - the script returns a 75x 75
file but only a sliver of the .jpg image is within the 75x75 blue square.
Any help will be of assistance.
Thank you.
Tony Ritter
The following is the php cropping script (with author credit):
http://obala.net/en
//
// Yes the proses could be executed with imagecopyresized build-in function
// but with this function you get the idea of how an image color set is
constructed
//
// $cropX = source starting X
// $cropY = source starting Y
// $cropW = crop weigth
// $cropH = crop heigh
// $source = source filename
// $destination = destination filename
// $type = image type
function
im_crop($cropX,$cropY,$cropH,$cropW,$source,$destination,$type='jpeg') {
// switch known types and open source image
switch ($type) {
case 'wbmp': $sim = ImageCreateFromWBMP($source); break;
case 'gif': $sim = ImageCreateFromGIF($source); break;
case 'png': $sim = ImageCreateFromPNG($source); break;
default: $sim = ImageCreateFromJPEG($source); break;
}
// create the destination image
$dim = imagecreate($cropW, $cropH);
// pass trought pixles of source image
for ( $i=$cropY; $i<($cropY+$cropH); $i++ ) {
for ( $j=$cropX; $j<($cropX+$cropW); $j++ ) {
// get RGB color info about a pixel in the source image
$color = imagecolorsforindex($sim, imagecolorat($sim, $j, $i));
// insert the color in the color index of the new image
$index = ImageColorAllocate($dim, $color['red'],
$color['green'], $color['blue']);
// plots a pixel in the new image with that color
imagesetpixel($dim, $j-$cropX, $i-$cropY, $index);
}
}
// whe dont need the sorce image anymore
imagedestroy($sim);
// switch known types and save
switch ($type) {
case 'wbmp': ImageWBMP($dim, $destination); break;
case 'gif': ImageGIF($dim, $destination); break;
case 'png': ImagePNG($dim, $destination); break;
default: ImageJPEG($dim, $destination); break;
}
// free the used space of the source image
imagedestroy($dim);
}
// example
im_crop(0,0,75,75,'1_data.jpeg','2_data.jpeg','jpeg');
?>
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