Php/docs/imagick.exportimagepixels
Imagick::exportImagePixels
(PECL imagick 2 >=2.3.0, PECL imagick 3)
Imagick::exportImagePixels — Exports raw image pixels
说明
public Imagick::exportImagePixels
( int $x
, int $y
, int $width
, int $height
, string $map
, int $STORAGE
) : array
Exports image pixels into an array. The map defines the ordering of the exported
pixels. The size of the returned array is width * height * strlen(map)
.
此方法在Imagick基于ImageMagick 6.4.7以上版本编译时可用。
参数
x
- X-coordinate of the exported area
y
- Y-coordinate of the exported area
width
- Width of the exported aread
height
- Height of the exported area
map
- Ordering of the exported pixels. For example
"RGB"
. Valid characters for the map are R, G, B, A, O, C, Y, M, K, I and P. STORAGE
- Refer to this list of pixel type constants
范例
Example #1 Using Imagick::exportImagePixels()
Export image pixels into an array
<?php/* Create new object */$im = new Imagick();/* Create new image */$im->newPseudoImage(0, 0, "magick:rose");/* Export the image pixels */$pixels = $im->exportImagePixels(10, 10, 2, 2, "RGB", Imagick::PIXEL_CHAR);/* Output */var_dump($pixels);?>
以上例程会输出:
array(12) { [0]=> int(72) [1]=> int(64) [2]=> int(57) [3]=> int(69) [4]=> int(59) [5]=> int(43) [6]=> int(124) [7]=> int(120) [8]=> int(-96) [9]=> int(91) [10]=> int(84) [11]=> int(111) }
返回值
Returns an array containing the pixels values.
错误/异常
错误时抛出 ImagickException。