用于上传图片的文字和图片水印的添加
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2022-04-22 16:34:24
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check($img) || !$this->watermark_on) return false; $water_img = $water_img ? $water_img : $this->water_img; //水印的开启状态 $waterimg_on = $this->check($water_img) ? 1 : 0; //判断是否在原图上操作 $out_img = $out_img ? $out_img : $img; //判断水印的位置 $pos = $pos ? $pos : $this->pos; //水印文字 $text = $text ? $text : $this->text; $img_info = getimagesize($img); $img_w = $img_info[0]; $img_h = $img_info[1]; //判断水印图片的类型 if( $waterimg_on ){ $w_info = getimagesize($water_img); $w_w = $w_info[0]; $w_h = $w_info[1]; if ( $img_w color)!=7 ) return FALSE; $text_info = imagettfbbox($this->size, 0, $this->font, $text); $w_w = $text_info[2] - $text_info[6]; $w_h = $text_info[3] - $text_info[7]; } //建立原图资源 switch ( $img_info[2] ){ case 1: $res_img = imagecreatefromgif($img); break; case 2: $res_img = imagecreatefromjpeg($img); break; case 3: $res_img = imagecreatefrompng($img); break; } //确定水印的位置 switch ( $pos ){ case 1: $x = $y =25; break; case 2: $x = ($img_w - $w_w)/2; $y = 25; break; case 3: $x = $img_w - $w_w; $y = 25; break; case 4: $x = 25; $y = ($img_h - $w_h)/2; break; case 5: $x = ($img_w - $w_w)/2; $y = ($img_h - $w_h)/2; break; case 6: $x = $img_w - $w_w; $y = ($img_h - $w_h)/2; break; case 7: $x = 25; $y = $img_h - $w_h; break; case 8: $x = ($img_w - $w_w)/2; $y = $img_h - $w_h; break; case 9: $x = $img_w - $w_w; $y = $img_h - $w_h; break; default : $x = mt_rand(25, $img_w - $w_w); $y = mt_rand(25, $img_h - $w_h); } //写入图片资源 if( $waterimg_on ){ imagecopymerge($res_img, $w_img, $x, $y, 0, 0, $w_w, $w_h, $this->pct); }else{ $r = hexdec(substr($this->color, 1,2)); $g = hexdec(substr($this->color, 3,2)); $b = hexdec(substr($this->color, 5,2)); $color = imagecolorallocate($res_img, $r, $g, $b); imagettftext($res_img, $this->size, 0, $x, $y, $color, $this->font, $text); } //生成图片类型 switch ( $img_info[2] ){ case 1: imagecreatefromgif($res_img,$out_img); break; case 2: //imagecreatefromjpeg($res_img,$out_img); imagejpeg($res_img,$out_img); break; case 3: imagejpeg($res_img,$out_img); break; } if(isset($res_img)) imagedestroy ($res_img); if(isset($w_img)) imagedestroy($w_img); return TRUE; } //验证图片是否存在 private function check($img){ $type = array('.jpg','.jpeg','.png','.gif'); $img_type = strtolower(strrchr($img, '.')); return extension_loaded('gd') && file_exists($img) && in_array($img_type, $type); } }