ImagickDraw::annotation

(PECL imagick 2.0.0)

ImagickDraw::annotation — Draws text on the image

说明

bool ImagickDraw::annotation ( float $x , float $y , string $text )

Warning

本函数还未编写文档，仅有参数列表。

Draws text on the image.

参数

x: The x coordinate where text is drawn
y: The y coordinate where text is drawn
text: The text to draw on the image

返回值

没有返回值。

用户评论:

[#1] web at synaptech dot fr [2013-07-17 10:31:17]

In some cases the (custom) font can be truncated on the side parts, especially the handwritten ones.
To improve the above note from Anonymous on "how to create a header image", I've changed this part of the code:

<?php $draw->annotation( $metrics['boundingBox']['y2'], $metrics['ascender'], $text ); $image->newImage( $metrics['textWidth'] + $metrics['boundingBox']['y2'], $metrics['textHeight'], $background ); ?>

[#2] Anonymous [2009-10-24 10:28:28]

Here's how to create a header image and write it to file. This took me a while to figure out. I hope this helps.

<?php $text = "Hello World!"; $image = new Imagick(); $draw = new ImagickDraw(); $color = new ImagickPixel('#000000'); $background = new ImagickPixel('none'); // Transparent $draw->setFont('Arial'); $draw->setFontSize(50); $draw->setFillColor($color); $draw->setStrokeAntialias(true); $draw->setTextAntialias(true); $metrics = $image->queryFontMetrics($draw, $text); $draw->annotation(0, $metrics['ascender'], $text); $image->newImage($metrics['textWidth'], $metrics['textHeight'], $background); $image->setImageFormat('png'); $image->drawImage($draw); file_put_contents('/path/to/file.png', $image); ?>

[#3] use_contact_form at Jonas-Kress dot de [2009-07-09 03:33:06]

may help someone...

<?php private function getTextRows($draw, $text, $maxWidth) { $words = explode(" ", $text); $lines = array(); $i=0; while ($i < count($words)) {//as long as there are words $line = ""; do {//append words to line until the fit in size if($line != ""){ $line .= " "; } $line .= $words[$i]; $i++; if(($i) == count($words)){ break;//last word -> break } //messure size of line + next word $linePreview = $line." ".$words[$i]; $metrics = $this->canvas->queryFontMetrics($draw, $linePreview); //echo $line."($i)".$metrics["textWidth"].":".$maxWidth."<br>"; }while($metrics["textWidth"] <= $maxWidth); //echo "<hr>".$line."<br>"; $lines[] = $line; } //var_export($lines); return $lines; } ?>

[#4] Anonymous [2009-06-30 08:08:53]

You can use this method to break your text so that it'll fit a certain $maxWidth.

<?php protected function _fitText($text, $maxWidth) { $im = new Imagick(); $im->newImage($this->_width, $this->_height, "none"); $lines = explode(PHP_EOL, trim($text)); $DEBUG_LOOP = 0; for ($k = 0; $k < count($lines); ++$k) { do { $drawText = new ImagickDraw(); // set your font settings like size, family, .. here $metrics = $im->queryFontMetrics($drawText, $lines[$k]); $fits = $metrics["textWidth"] <= $maxWidth; if ($fits) { break; } $pos = mb_strrpos($lines[$k], " "); if ($pos === false) { throw new RuntimeException("can not make it fit"); } if (!isset($lines[$k + 1])) { $lines[$k + 1] = null; } $lines[$k + 1] = trim(mb_substr($lines[$k], $pos + 1) . " " . $lines[$k + 1]); $lines[$k] = trim(mb_substr($lines[$k], 0, $pos)); if (++$DEBUG_LOOP >= 200) { throw new RuntimeException("infinite loop"); } } while (!$fits); } $text = implode(PHP_EOL, $lines); $drawText = new ImagickDraw(); // set your font settings like size, family, .. here again! $metrics = $im->queryFontMetrics($drawText, $text); $metrics["text"] = $text; assert('$metrics["textWidth"] <= $maxWidth'); return $metrics; } ?>