ImageCopyResized() 函数在所有GD版本中有效,但其缩放图像的.
ImageCopyResamples()介绍
ImageCopyResized() 函数在所有GD版本中有效,但其缩放图像的.
ImageCopyResamples()简介
PHP中缩放图像.
(1):
(2):ImageCopyResampled() ,其像素插值算法得到的.(但该函数的速度比 ImageCopyResized() 慢).
两个函数的参数是一样的.如下:
ImageCopyResampled(dest,src,dy,dx,sx,sy,dw,dh,sw,sh);
ImageCopyResized(dest,src,dy,dx,sx,sy,dw,dh,sw,sh);
ImageCopyResamples()例子
$src = ImageCreateFromJPEG('php.jpg');
$width = ImageSx($src);
$height = ImageSy($src);
$x = $widht/2;
$y = $height/2;
$dst = ImageCreateTrueColor($x,$y);
ImageCopyResampled($dst,$src,0,0,0,0,$x,$y,$widht,$height);
header('Content-Type : image/png');
ImagePNG($det);
?>
