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规定区域内字体大小自适应php代码
代码1 :
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font = $font; $this->step_wrap = $step_wrap>1?$step_wrap:1; $this->step_fontsize = $step_fontsize>1?$step_fontsize:1; } function fit($width, $height, $text, $fontsize, $min_fontsize=5, $min_wraplength=0){ $this->fontsize = & $fontsize; $text_ = $text; while($this->TextHeight($text_)>$height && $fontsize>$min_fontsize) $fontsize -= $this->step_fontsize; while(($this->TextWidth($text_)>$width || $this->TextHeight($text_)>$height) && $fontsize>$min_fontsize){ $fontsize -= $this->step_fontsize; $wraplength = $this->maxLen($text); $text_ = $text; while($this->TextWidth($text_)>$width && $wraplength>=$min_wraplength+$this->step_wrap){ $wraplength -= $this->step_wrap; $text_ = wordwrap($text, $wraplength, "\n", true); //To speed up: if($this->TextHeight($text_)>$height) break; if($wraplength<=$min_wraplength) break; $wraplength_ = $wraplength; $wraplength = ceil($wraplength/($this->TextWidth($text_)/$width)); $wraplength = $wraplength<($min_wraplength+$this->step_wrap)?($min_wraplength+$this->step_wrap):$wraplength; } } $this->width = $this->TextWidth($text_); $this->height = $this->TextHeight($text_); return array("fontsize"=>$fontsize, "text"=>$text_, "width"=>$this->width, "height"=>$this->height); } function maxLen($text){ $lines = explode("\n", str_replace("\r", "", $text)); foreach($lines as $line) $t[] = strlen($line); return max($t); } function TextWidth($text){ $t = p_w_picpathttfbbox($this->fontsize, 0, $this->font, $text); return $t[2]-$t[0]; } function TextHeight($text){ $t = p_w_picpathttfbbox($this->fontsize, 0, $this->font, $text); return $t[1]-$t[7]; } } ?>
代码2:
// The maximun height $height = 100;
// Position of the text and the box $x1 = 50; $y1 = 50;
// The starting font size $fontsize = 10;
// The minimun font size. The script will stop if it cannot fit the text even with this size. $min_fontsize = 3;
// The minimun wrap length for each line. The script will try another font size if it cannot fit the text even with this wrap length. $min_wraplength = 0;
// The font $font = "arial.ttf";
// The space between the box and the text. It's independent to the script which can be ignored $padding = 3;
// If the script cannot fit the text for certain wrap length, it will try the wrap length again with the reduction in this value. // It reduce the accuracy, but will slightly speed up the process. $step_wrap = 1; // If the script cannot fit the text for certain font size, it will try the the font size again with the reduction in this value.
// It reduce the accuracy, but will slightly speed up the process. $step_fontsize = 1;
// Create a p_w_picpath $im = @p_w_picpathcreatetruecolor($width+$x1*2, $height+$y1*2+80) or die('Cannot Initialize new GD p_w_picpath stream'); // Start the timer $time_start = microtime_float();
//The class $p_w_picpathfittext = new ImageFitText($font, $step_wrap, $step_fontsize); // Fit the text // It returns the result in a array with "fontsize", "text", "width", "height" $fit = $p_w_picpathfittext->fit($width-$padding*2, $height-$padding*2, $text, $fontsize, $min_fontsize, $min_wraplength); // Stop the timer $time = round(microtime_float()-$time_start, 3); $white = p_w_picpathcolorallocate($im, 255, 255, 255); // Draw a box p_w_picpathrectangle($im, $x1, $y1, $x1+$width, $y1+$height, $white); // Write the text +8 because the text will move up originally p_w_picpathttftext($im, $fit['fontsize'], 0, $x1+$padding, $y1+$padding+8, $white, $font, $fit['text']); // Print some info. about the text p_w_picpathstring($im, 5, $x1, $y1+$height+30, 'Fontsize : '.$fit['fontsize'], $white); p_w_picpathstring($im, 5, $x1, $y1+$height+45, 'Text Size : '.$fit['width']."x".$fit['height'], $white); p_w_picpathstring($im, 5, $x1, $y1+$height+60, 'Box Size : '.($width-$padding*2)."x".($height-$padding*2), $white); p_w_picpathstring($im, 5, $x1, $y1+$height+75, 'Time used : '.$time.'s', $white); // Print the p_w_picpath header ('Content-Type: p_w_picpath/png'); p_w_picpathpng($im); p_w_picpathdestroy($im); function microtime_float(){ // Timer list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); } ?>