These are the letters for the map:
R = red
G = green
B = blue
A = alpha (0 is transparent)
O = alpha (0 is opaque)
C = cyan
Y = yellow
M = magenta
K = black
I = intensity (for grayscale)
P = pad
Imagick::exportImagePixels
(PECL imagick 2 >=2.3.0, PECL imagick 3)
Imagick::exportImagePixels — Exports raw image pixels
说明
public Imagick::exportImagePixels(
int
int
int
int
string
int
): array
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
返回值
Returns an array containing the pixels values.
错误／异常
错误时抛出 ImagickException。
示例
示例 #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);
?>以上示例会输出：
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)
}
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