仅显示图像的某些部分并使用GD调整其大小
I currently have a script ready that resizes a whole image with GD but I need to get a specific part of an image to display and resize only that specific part.
This is the image:
This is what needs to be displayed, took out the rest with Photoshop:
The final image needs to be 150x150.
This is the script i tried:
<?php
$srcp = imagecreatefrompng("enjikaka.png");
$destp = imagecreate(150, 150);
imagecopyresampled($destp, $srcp, 0, 0, -8, -8, 150, 150, 64, 32);
header('Content-type: image/png');
imagepng($destp);
?>
But this one does not pick the correct part of the image. Can anyone help me here?
Why the (-8, -8)? Those should be the upper left corner of your area to copy. It should be 8, 8. And the last two parameters: (64, 32) are the width and height of your source area. Those should be 8, 8 too.
imagecopyresampled ($destp, $srcp, 0, 0, 8, 8, 150, 150, 8, 8);
I assume here that your source image is built up by 8x8 units. You should check the coordinates in photosop.
I suggest you read the documentation of the function. That shopuld be the first thing you do when things do not go as you expected.
$srcp = imagecreatefrompng("enjikaka.png");
$destp = imagecreate(150, 150);
imagecopy($despt, $srcp, $dst_x , $dst_y , $src_x , $src_y , $src_w , $src_h);
I think you should include this call to imagecopy in your script, which should handle the cropping of the image.