canvas.toTempFilePath截图保存图片，图片有严重的残影
发布于 5 年前 作者 yong42 14338 次浏览 来自 问答

小游戏渲染模式为Webgl时，canvas.toTempFilePath截图保存图片后，图片有严重的边缘残影。渲染模式为canvas时，没有这个问题。

在小游戏里是正常的，显示没有任何问题。

代码：

            var canvas = cc.game.canvas;

            var height  = canvas.height;

            var width  = canvas.width;

            canvas.toTempFilePath({

                x: 0,

                y: 0,

                width: width,

                height: height,

                destWidth: width,

                destHeight: height,

                success (res) {

                    console.log(res);

                    wx.saveImageToPhotosAlbum({

                        filePath: res.tempFilePath,

                        success:function(r){

                            console.log(r);

                            cc.instantiate(that.tipsPrefab).getComponent(‘Tips’).init(that.node, ‘保存成功’, 0, 0, 500);

                        },

                        fail:function(r){

                            console.log(r);

                        }

                    })

                }

            })

3 回复

你们有线上的小游戏可以复现吗，复现步骤是？

麻烦给个相关的代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html），我们定位下问题

也提供下截图正常和截图残影的对比照

这是正常效果：

我的工程里有cocos2d-js引擎，代码片段也超过200K，提交不了片段。

这是核心代码：

saveShotToAlbum:function(){
 
        var that = this;
        wx.getSetting({
            success(res) {
                if (!res.authSetting['scope.writePhotosAlbum']) {
                    wx.authorize({
                        scope: 'scope.writePhotosAlbum',
                        success() {
                            shotAndSaveImage();
                        },
                        fail: function (res) {
                        }
                    })
                } else {
                    shotAndSaveImage();
                }
            }
        });
 
        function shotAndSaveImage(){
            var canvas = cc.game.canvas;
            var height  = canvas.height;
            var width  = canvas.width;
 
            canvas.toTempFilePath({
                x: 0,
                y: 0,
                width: width,
                height: height,
                destWidth: width,
                destHeight: height,
                success (res) {
                    console.log(res);
 
                    wx.saveImageToPhotosAlbum({
                        filePath: res.tempFilePath,
                        success:function(r){
                            console.log(r);
                        },
                        fail:function(r){
                            console.log(r);
                        }
                    })
                }
            })
        }
    },
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