Imagick::exportImagePixels()
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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 iswidth * 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。