最终,我不得不放弃CSS前端,并使用GD生成透明PNG作为标题。虽然不是理想的解决方案,但在定位方面给了我更多的灵活性。如果有人对我使用的旋转脚本感兴趣,可以看下面的代码。
define("DEFAULT_FONT", "fonts/BebasNeue-webfont.ttf");
define("DEFAULT_COLOR", "ed217c");
define("DEFAULT_SIZE", 24);
define("DEFAULT_ANGLE", 0);
define("DEFAULT_PADDING", 10);
define("DEFAULT_SPACING", 0);
$text = $_GET['text'];
if(isset($_GET['transform'])):
switch ($_GET['transform']){
case 'uc':
$text = strtoupper($_GET['text']);
break;
case 'lc':
$text = strtolower($_GET['text']);
break;
case 'ucf':
$text = ucfirst($_GET['text']);
break;
case 'ucw':
$text = ucwords($_GET['text']);
break;
}
endif;
$font = $_GET['font'] ? $_GET['font'] : DEFAULT_FONT;
$color = (strlen($_GET['color']) == 6 && ctype_alnum($_GET['color'])) ? "0x" . $_GET['color'] : "0x" . DEFAULT_COLOR;
$size = (is_numeric($_GET['size'])) ? $_GET['size'] : DEFAULT_SIZE;
$angle = (is_numeric($_GET['angle'])) ? $_GET['angle'] : DEFAULT_ANGLE;
$padding = (is_numeric($_GET['padding'])) ? $_GET['padding']*4 : DEFAULT_PADDING*4;
$spacing = (is_numeric($_GET['spacing'])) ? $_GET['spacing'] : DEFAULT_SPACING;
$text_dimensions = calculateTextDimensions($text, $font, $size, $angle, $spacing);
$image_width = $text_dimensions["width"] + $padding;
$image_height = $text_dimensions["height"] + $padding;
$new_image = imagecreatetruecolor($image_width, $image_height);
ImageFill($new_image, 0, 0, IMG_COLOR_TRANSPARENT);
imagesavealpha($new_image, true);
imagealphablending($new_image, false);
imagettftextSp($new_image, $size, $angle, $text_dimensions["left"] + ($image_width / 2) - ($text_dimensions["width"] / 2), $text_dimensions["top"] + ($image_height / 2) - ($text_dimensions["height"] / 2), $color, $font, $text, $spacing);
imagepng($new_image);
imagerotate($new_image, 90, 0);
imagedestroy($new_image);
function imagettftextSp($image, $size, $angle, $x, $y, $color, $font, $text, $spacing = 0)
{
if ($spacing == 0)
{
imagettftext($image, $size, $angle, $x, $y, $color, $font, $text);
}
else
{
$temp_x = $x;
for ($i = 0; $i < strlen($text); $i++)
{
$bbox = imagettftext($image, $size, $angle, $temp_x, $y, $color, $font, $text[$i]);
$temp_x += $spacing + ($bbox[2] - $bbox[0]);
}
}
}
function calculateTextDimensions($text, $font, $size, $angle, $spacing) {
$rect = imagettfbbox($size, $angle, $font, $text);
$minX = min(array($rect[0],$rect[2],$rect[4],$rect[6]));
$maxX = max(array($rect[0],$rect[2],$rect[4],$rect[6]));
$minY = min(array($rect[1],$rect[3],$rect[5],$rect[7]));
$maxY = max(array($rect[1],$rect[3],$rect[5],$rect[7]));
$spacing = ($spacing*(strlen($text)+2));
return array(
"left" => abs($minX) - 1,
"top" => abs($minY) - 1,
"width" => ($maxX - $minX)+$spacing,
"height" => $maxY - $minY,
"box" => $rect
);
}
header("content-type: image/png");
这是基于Jason Lau的优秀脚本进行修改而来,原始脚本可以在这里找到。