超越PHP - Exceed PHP: imagecopy

imagecopy

(PHP 3>= 3.0.6, PHP 4 , PHP 5)

imagecopy -- 拷贝图像的一部分

说明

int imagecopy ( resource dst_im, resource src_im, int dst_x, int dst_y, int src_x, int src_y, int src_w, int src_h)

将 src_im 图像中坐标从 src_x，src_y 开始，宽度为 src_w，高度为 src_h 的一部分拷贝到 dst_im 图像中坐标为 dst_x 和 dst_y 的位置上。

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imagecopy

jsnell at networkninja dot com
18-Feb-2001 11:09

Want to make an image tile properly?  This is accomplished by swapping all
four quadrants of the image.  Here is some sample code that uses imagecopy
to do it:



function backgroundify(&$image)

{

	$ix =
imagesx($image);

	$iy = imagesy($image);

	$ixhalf = floor($ix / 2);
// DON'T USE ON IMAGES WITH ODD SIZES! 

	$iyhalf = floor($iy
/2);

	$panel_temp = ImageCreate ($ix, $iy) or die("Cannot
Initialize new GD image stream");

	imagecopy($panel_temp, $image,
0,0,0,0,$ix, $iy);

	imagecopy($image, $panel_temp, 0,0,$ixhalf,$iyhalf,
$ix-$ixhalf, $iy-$iyhalf); // move bottom right to top
left

	imagecopy($image, $panel_temp, $ixhalf,$iyhalf, 0,0,$ix-$ixhalf,
$iy-$iyhalf); // top left to bottom right

	imagecopy($image,
$panel_temp, $ixhalf, 0,0,$iyhalf,$ix-$ixhalf, $iy-$iyhalf); // bottom left
to topo right

	imagecopy($image, $panel_temp, 0,$iyhalf,
$ixhalf,0,$ix-$ixhalf, $iy-$iyhalf); // top left to bottom right

}

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