protected function convertImageToResource()
{
$_images = [];
foreach ($this->images as $index => $image) {
if (@file_exists($image) && @is_readable($image)) {
$_images[] = SimpleImage::loadFile($image);
} elseif (is_resource($image) && imagesx($image)) {
$_images[] = $image;
} elseif (getimagesizefromstring($image)) {
$_images[] = imagecreatefromstring($image);
} else {
throw new ImageException('image ' . $index . ' is not a valid mode image data.');
}
}
return $_images;
}
/**
* @param resource $im
* @param string$text
* @param string $font
* @param int $size
* @param int $x 注意此处的坐标是以文字左上角为圆点
* @param int $y
* @param array|int|string $color
* @param array $outer
* @param int $alpha 聚值0-127
* @param int $angle
* @return $this
*/
protected static function textOuter($im, $text, $font, $size, $x, $y, $color = [0, 0, 0], $outer = [255, 255, 255], $alpha = 0, $angle = 0)
{
$x = (int) $x;
$y = (int) $y;
$ttf = false;
if (@file_exists($font) && @is_readable($font)) {
$ttf = true;
$area = imagettfbbox($size, $angle, $font, $text);
$width = $area[2] - $area[0] + 2;
$height = $area[1] - $area[5] + 2;
} else {
$width = strlen($text) * 10;
$height = 16;
}
$im_tmp = imagecreate($width, $height);
$white = imagecolorallocatealpha($im_tmp, 255, 255, 255, $alpha);
$black = imagecolorallocatealpha($im_tmp, 0, 0, 0, $alpha);
$color = SimpleImage::colorAllocateAlpha($im, $color, $alpha);
$outer = SimpleImage::colorAllocateAlpha($im, $outer, $alpha);
if ($ttf) {
imagettftext($im_tmp, $size, 0, 0, $height - 2, $black, $font, $text);
imagettftext($im, $size, 0, $x, $y, $color, $font, $text);
$y = $y - $height + 2;
} else {
imagestring($im_tmp, $size, 0, 0, $text, $black);
imagestring($im, $size, $x, $y, $text, $color);
}
for ($i = 0; $i < $width; $i++) {
for ($j = 0; $j < $height; $j++) {
$c = imagecolorat($im_tmp, $i, $j);
if ($c !== $white) {
imagecolorat($im_tmp, $i, $j - 1) != $white || imagesetpixel($im, $x + $i, $y + $j - 1, $outer);
imagecolorat($im_tmp, $i, $j + 1) != $white || imagesetpixel($im, $x + $i, $y + $j + 1, $outer);
imagecolorat($im_tmp, $i - 1, $j) != $white || imagesetpixel($im, $x + $i - 1, $y + $j, $outer);
imagecolorat($im_tmp, $i + 1, $j) != $white || imagesetpixel($im, $x + $i + 1, $y + $j, $outer);
// 取消注释，与Fireworks的发光效果相同
imagecolorat($im_tmp, $i - 1, $j - 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j - 1, $outer);
imagecolorat($im_tmp, $i + 1, $j - 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j - 1, $outer);
imagecolorat($im_tmp, $i - 1, $j + 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j + 1, $outer);
imagecolorat($im_tmp, $i + 1, $j + 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j + 1, $outer);
}
}
}
imagedestroy($im_tmp);
return $im;
}
