ImagickDraw::pathStart

(PECL imagick 2, PECL imagick 3)

ImagickDraw::pathStart — Declares the start of a path drawing list

说明

public ImagickDraw::pathStart(): bool

警告

本函数还未编写文档，仅有参数列表。

Declares the start of a path drawing list which is terminated by a matching DrawPathFinish() command. All other DrawPath commands must be enclosed between a and a DrawPathFinish() command. This is because path drawing commands are subordinate commands and they do not function by themselves.

返回值

没有返回值。

示例

示例 #1 ImagickDraw::pathStart() example

<?php
function pathStart($strokeColor, $fillColor, $backgroundColor) {

$draw = new \ImagickDraw();

$draw->setStrokeOpacity(1);
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);

$draw->setStrokeWidth(2);
$draw->setFontSize(72);

$draw->pathStart();
$draw->pathMoveToAbsolute(50, 50);
$draw->pathLineToAbsolute(100, 50);
$draw->pathLineToRelative(0, 50);
$draw->pathLineToHorizontalRelative(-50);
$draw->pathFinish();

$draw->pathStart();
$draw->pathMoveToAbsolute(50, 50);
$draw->pathMoveToRelative(300, 0);
$draw->pathLineToRelative(50, 0);
$draw->pathLineToVerticalRelative(50);
$draw->pathLineToHorizontalAbsolute(350);
$draw->pathclose();
$draw->pathFinish();

$draw->pathStart();
$draw->pathMoveToAbsolute(50, 300);
$draw->pathCurveToAbsolute(50, 300, 100, 200, 300, 300);
$draw->pathLineToVerticalAbsolute(350);
$draw->pathFinish();

$imagick = new \Imagick();
$imagick->newImage(500, 500, $backgroundColor);
$imagick->setImageFormat("png");

$imagick->drawImage($draw);

header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}

?>

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v010dya ¶

1 year ago

Between $draw->pathStart() and $draw->pathFinish() you would need to start with $draw->pathMoveToAbsolute(x, y) to initialise the position. All the subsequent calls to "path functions" (including absolute ones) will continue the path.

I would expect pathStart to accept the starting coordinates, and it took me a while to realise that there you need to initialise with a different function.