基本用法

Imagick 透過物件導向介面讓 PHP 中的影像操作變得非常簡單。以下是如何製作縮圖的快速範例

使用 SPL 和 Imagick 支援的其他物件導向功能，可以輕鬆調整目錄中所有檔案的大小（適用於批次調整大型數位相機影像大小以供網頁檢視）。在這裡我們使用 resize，因為我們可能想要保留某些中繼資料。

這是建立影像反射效果的範例。反射效果是透過翻轉影像並在其上疊加漸層來建立的。然後將原始影像和反射效果都疊加到畫布上。

範例 #3 建立影像的反射效果

<?php
/* Read the image */
$im = new Imagick("test.png");

/* Thumbnail the image */
$im->thumbnailImage(200, null);

/* Create a border for the image */
$im->borderImage(new ImagickPixel("white"), 5, 5);

/* Clone the image and flip it */
$reflection = $im->clone();
$reflection->flipImage();

/* Create gradient. It will be overlayed on the reflection */
$gradient = new Imagick();

/* Gradient needs to be large enough for the image and the borders */
$gradient->newPseudoImage($reflection->getImageWidth() + 10, $reflection->getImageHeight() + 10, "gradient:transparent-black");

/* Composite the gradient on the reflection */
$reflection->compositeImage($gradient, imagick::COMPOSITE_OVER, 0, 0);

/* Add some opacity. Requires ImageMagick 6.2.9 or later */
$reflection->setImageOpacity( 0.3 );

/* Create an empty canvas */
$canvas = new Imagick();

/* Canvas needs to be large enough to hold the both images */
$width = $im->getImageWidth() + 40;
$height = ($im->getImageHeight() * 2) + 30;
$canvas->newImage($width, $height, new ImagickPixel("black"));
$canvas->setImageFormat("png");

/* Composite the original image and the reflection on the canvas */
$canvas->compositeImage($im, imagick::COMPOSITE_OVER, 20, 10);
$canvas->compositeImage($reflection, imagick::COMPOSITE_OVER, 20, $im->getImageHeight() + 10);

/* Output the image*/
header("Content-Type: image/png");
echo $canvas;
?>

上述範例將輸出類似以下的內容

此範例說明如何在繪圖期間使用填色圖樣。

範例 #4 使用漸層填滿文字

<?php

/* Create a new imagick object */
$im = new Imagick();

/* Create new image. This will be used as fill pattern */
$im->newPseudoImage(50, 50, "gradient:red-black");

/* Create imagickdraw object */
$draw = new ImagickDraw();

/* Start a new pattern called "gradient" */
$draw->pushPattern('gradient', 0, 0, 50, 50);

/* Composite the gradient on the pattern */
$draw->composite(Imagick::COMPOSITE_OVER, 0, 0, 50, 50, $im);

/* Close the pattern */
$draw->popPattern();

/* Use the pattern called "gradient" as the fill */
$draw->setFillPatternURL('#gradient');

/* Set font size to 52 */
$draw->setFontSize(52);

/* Annotate some text */
$draw->annotation(20, 50, "Hello World!");

/* Create a new canvas object and a white image */
$canvas = new Imagick();
$canvas->newImage(350, 70, "white");

/* Draw the ImagickDraw on to the canvas */
$canvas->drawImage($draw);

/* 1px black border around the image */
$canvas->borderImage('black', 1, 1);

/* Set the format to PNG */
$canvas->setImageFormat('png');

/* Output the image */
header("Content-Type: image/png");
echo $canvas;
?>

上述範例將輸出類似以下的內容

處理動畫 GIF 影像

使用橢圓基本體和自訂字體

範例 #6 建立 PHP 標誌

<?php
/* Set width and height in proportion of genuine PHP logo */
$width = 400;
$height = 210;

/* Create an Imagick object with transparent canvas */
$img = new Imagick();
$img->newImage($width, $height, new ImagickPixel('transparent'));

/* New ImagickDraw instance for ellipse draw */
$draw = new ImagickDraw();
/* Set purple fill color for ellipse */
$draw->setFillColor('#777bb4');
/* Set ellipse dimensions */
$draw->ellipse($width / 2, $height / 2, $width / 2, $height / 2, 0, 360);
/* Draw ellipse onto the canvas */
$img->drawImage($draw);

/* Reset fill color from purple to black for text (note: we are reusing ImagickDraw object) */
$draw->setFillColor('black');
/* Set stroke border to white color */
$draw->setStrokeColor('white');
/* Set stroke border thickness */
$draw->setStrokeWidth(2);
/* Set font kerning (negative value means that letters are closer to each other) */
$draw->setTextKerning(-8);
/* Set font and font size used in PHP logo */
$draw->setFont('Handel Gothic.ttf');
$draw->setFontSize(150);
/* Center text horizontally and vertically */
$draw->setGravity(Imagick::GRAVITY_CENTER);

/* Add center "php" with Y offset of -10 to canvas (inside ellipse) */
$img->annotateImage($draw, 0, -10, 0, 'php');
$img->setImageFormat('png');

/* Set appropriate header for PNG and output the image */
header('Content-Type: image/png');
echo $img;
?>

上述範例將輸出類似以下的內容