/**
* Returns boundings of text depending on the available font extension
*
* @param float $size Textsize
* @param ezcGraphFontOptions $font Font
* @param string $text Text
* @return ezcGraphBoundings Boundings of text
*/
protected function getTextBoundings($size, ezcGraphFontOptions $font, $text)
{
$this->context->selectFontFace($font->name, CairoFontSlant::NORMAL, CairoFontWeight::NORMAL);
$this->context->setFontSize($size);
$extents = $this->context->textExtents($text);
return new ezcGraphBoundings(0, 0, $extents['width'], $extents['height']);
}
<?php
$char = 'Cairo';
$sur = new CairoImageSurface(0, 500, 500);
$con = new CairoContext($sur);
$con->selectFontFace('Sans');
$con->setFontSize(100);
$ext = $con->textExtents($char);
$x = 25.0;
$y = 150.0;
$con->moveTo($x, $y);
$con->showText($char);
$con->setSourceRgba(1, 0.2, 0.2, 0.6);
$con->setLineWidth(6.0);
$con->arc($x, $y, 10, 0, 2 * 3.14);
$con->fill();
$con->moveTo($x, $y);
$con->relLineTo(0, -1 * $ext['height']);
$con->relLineTo($ext['width'], 0);
$con->relLineTo($ext['x_bearing'], -1 * $ext['y_bearing']);
$con->stroke();
$sur->writeToPng(dirname(__FILE__) . '/text-extents.png');
$c2->save();
$c2->setSourceRgba(0, 0, 0, 0);
$c2->setOperator(CairoOperator::SOURCE);
$c2->paint();
$c2->restore();
$c2->setSourceRgb(1, 1, 1);
$c2->arc(0.5 * $wi, 0.5 * $he, 0.45 * $he, 0, 2 * M_PI);
$c2->fill();
//unset($c2);
$con->maskSurface($msur, $x, $y);
//unset($msur);
//unset($stemp);
break;
case 1:
$con->setFontSize(0.9 * $height);
$ext = $con->textExtents("FG");
$con->moveTo($x + floor(($width - $ext["width"]) / 2 + 0.5) - $ext["x_bearing"], $y + floor(($height - $ext["height"]) / 2 + 0.5) - $ext["y_bearing"]);
$con->showText("FG");
break;
case 2:
$wi = floor($width * 9 / 10);
$he = floor($height * 9 / 10);
$x += 0.05 * $width;
$y += 0.05 * $height;
$con->newPath();
$con->moveTo($x, $y);
$con->lineTo($x, $y + $he);
$con->lineTo($x + $wi / 2, $y + 3 * $he / 4);
$con->lineTo($x + $wi, $y + $he);
$con->lineTo($x + $wi, $y);
$con->lineTo($x + $wi / 2, $y + $he / 4);
$ext = $con->textExtents($str);
$sf = $con->getScaledFont();
$sext = $sf->textExtents("text");
$lw = $con->getLineWidth();
$con->rectangle($x + $ext["x_bearing"] - $lw / 2, $y + $ext["y_bearing"] - $lw / 2, $ext["width"] + $lw, $ext["height"] + $lw);
$con->stroke();
$con->moveTo($x, $y);
$con->showText($str);
$con->restore();
}
$sur = new CairoImageSurface(CairoFormat::ARGB32, 38, 34);
$con = new CairoContext($sur);
$con->setSourceRgb(1, 1, 1);
$con->paint();
$con->selectFontFace("Bitstream Vera Sans");
$con->setFontSize(12);
$con->translate(4, 4);
$con->setLineWidth(1);
$ext = $con->textExtents("text");
$con->setSourceRgb(0, 0, 0);
box_text("text", 0, -$ext["y_bearing"]);
$mat = new CairoMatrix();
$mat->translate(6, 16);
$mat->scale(12, 12);
$con->setFontMatrix($mat);
$con->setSourceRgb(0, 0, 1);
box_text("text", 0, -$ext["y_bearing"]);
$sur->writeToPng(dirname(__FILE__) . "/font-matrix-translation-php.png");
?>
