1. php imagick扩展插件（这种方式并不完美）
a.研究imagick插件方法.
$im = new Imagick($upload_path . $file_name);$svg = file_get_contents($upload_path . $file_name);$svg = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>'.$svg;$im->readImageBlob($svg);// png settings$im->setImageFormat("png24");$srcImage = $im->getImageGeometry(); //获取源图片宽和高$im->resizeImage($srcImage['width'], $srcImage['height'], imagick::FILTER_LANCZOS, 1, false);$im->writeImage($upload_path.'/'.$topng_name.'.png');$im->clear();$im->destroy();
b.遇到的问题
svg图片可以成功转化为png格式图片，但png图片存在问题：
1）线段丢失；
2）字体不展示；
3）svg文件中style标签样式不能解析；
2. 弃用imagick插件，改为svg转canvas转png
a.svg转canvas
function drawInlineSVG($svg, callback) {var svg = $svg;var parser = new DOMParser();var doc = parser.parseFromString(svg, "text/xml");svg = doc.getElementsByTagName('svg');svg = svg[0];svg.innerHTML = '<rect width="100%" height="100%" fill="#ffffff"></rect>' + svg.innerHTML;var svgData = new XMLSerializer().serializeToString( svg );var img = document.createElement( "img" );img.setAttribute( "src", "data:image/svg+xml;base64," + btoa( unescape(encodeURIComponent(svgData)) ) );img.onload = function () {var canvas = document.createElement( "canvas" );canvas.width = img.width;canvas.height = img.height;var ctx = canvas.getContext( "2d" ); //取得画布的2d绘图上下文ctx.drawImage( img, 0, 0 );canvas.toDataURL( "image/png" );var base64Src = canvas.toDataURL( "image/png" );callback && callback(base64Src); // 调用回掉函数};return;}
b.canvas转png(base64Src转化为png)
/* base64格式编码转换为图片并保存对应文件夹 */function base64_image_content($base64_image_content,$path, $file_name = ''){//匹配出图片的格式if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){if(!file_exists($path)){// 路径不存在return false;}$new_file = $path . $file_name;if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64_image_content)))){return '/'.$new_file;}else{return false;}}else{return false;}}
c.效果示例
1）svg格式
2）png格式
