新增绘制海报组件

2021-09-29 09:47:20 +08:00
parent b21b8d8dbf
commit 86562924a5
181 changed files with 3983 additions and 32858 deletions
--- a/uni_modules/sakura-canvas/js_sdk/image-tools.js
+++ b/uni_modules/sakura-canvas/js_sdk/image-tools.js
@@ -0,0 +1,147 @@
+function getLocalFilePath(path) {
+    if (path.indexOf('_www') === 0 || path.indexOf('_doc') === 0 || path.indexOf('_documents') === 0 || path.indexOf('_downloads') === 0) {
+        return path
+    }
+    if (path.indexOf('file://') === 0) {
+        return path
+    }
+    if (path.indexOf('/storage/emulated/0/') === 0) {
+        return path
+    }
+    if (path.indexOf('/') === 0) {
+        var localFilePath = plus.io.convertAbsoluteFileSystem(path)
+        if (localFilePath !== path) {
+            return localFilePath
+        } else {
+            path = path.substr(1)
+        }
+    }
+    return '_www/' + path
+}
+
+export function pathToBase64(path) {
+    return new Promise(function(resolve, reject) {
+        if (typeof window === 'object' && 'document' in window) {
+            if (typeof FileReader === 'function') {
+                var xhr = new XMLHttpRequest()
+                xhr.open('GET', path, true)
+                xhr.responseType = 'blob'
+                xhr.onload = function() {
+                    if (this.status === 200) {
+                        let fileReader = new FileReader()
+                        fileReader.onload = function(e) {
+                            resolve(e.target.result)
+                        }
+                        fileReader.onerror = reject
+                        fileReader.readAsDataURL(this.response)
+                    }
+                }
+                xhr.onerror = reject
+                xhr.send()
+                return
+            }
+            var canvas = document.createElement('canvas')
+            var c2x = canvas.getContext('2d')
+            var img = new Image
+            img.onload = function() {
+                canvas.width = img.width
+                canvas.height = img.height
+                c2x.drawImage(img, 0, 0)
+                resolve(canvas.toDataURL())
+                canvas.height = canvas.width = 0
+            }
+            img.onerror = reject
+            img.src = path
+            return
+        }
+        if (typeof plus === 'object') {
+            plus.io.resolveLocalFileSystemURL(getLocalFilePath(path), function(entry) {
+                entry.file(function(file) {
+                    var fileReader = new plus.io.FileReader()
+                    fileReader.onload = function(data) {
+                        resolve(data.target.result)
+                    }
+                    fileReader.onerror = function(error) {
+                        reject(error)
+                    }
+                    fileReader.readAsDataURL(file)
+                }, function(error) {
+                    reject(error)
+                })
+            }, function(error) {
+                reject(error)
+            })
+            return
+        }
+        if (typeof wx === 'object' && wx.canIUse('getFileSystemManager')) {
+            wx.getFileSystemManager().readFile({
+                filePath: path,
+                encoding: 'base64',
+                success: function(res) {
+                    resolve('data:image/png;base64,' + res.data)
+                },
+                fail: function(error) {
+                    reject(error)
+                }
+            })
+            return
+        }
+        reject(new Error('not support'))
+    })
+}
+
+export function base64ToPath(base64) {
+    return new Promise(function(resolve, reject) {
+        if (typeof window === 'object' && 'document' in window) {
+            base64 = base64.split(',')
+            var type = base64[0].match(/:(.*?);/)[1]
+            var str = atob(base64[1])
+            var n = str.length
+            var array = new Uint8Array(n)
+            while (n--) {
+                array[n] = str.charCodeAt(n)
+            }
+            return resolve((window.URL || window.webkitURL).createObjectURL(new Blob([array], { type: type })))
+        }
+        var extName = base64.match(/data\:\S+\/(\S+);/)
+        if (extName) {
+            extName = extName[1]
+        } else {
+            reject(new Error('base64 error'))
+        }
+        var fileName = Date.now() + '.' + extName
+        if (typeof plus === 'object') {
+            var bitmap = new plus.nativeObj.Bitmap('bitmap' + Date.now())
+            bitmap.loadBase64Data(base64, function() {
+                var filePath = '_doc/uniapp_temp/' + fileName
+                bitmap.save(filePath, {}, function() {
+                    bitmap.clear()
+                    resolve(filePath)
+                }, function(error) {
+                    bitmap.clear()
+                    reject(error)
+                })
+            }, function(error) {
+                bitmap.clear()
+                reject(error)
+            })
+            return
+        }
+        if (typeof wx === 'object' && wx.canIUse('getFileSystemManager')) {
+            var filePath = wx.env.USER_DATA_PATH + '/' + fileName
+            wx.getFileSystemManager().writeFile({
+                filePath: filePath,
+                data: base64.replace(/^data:\S+\/\S+;base64,/, ''),
+                encoding: 'base64',
+                success: function() {
+                    resolve(filePath)
+                },
+                fail: function(error) {
+                    reject(error)
+                }
+            })
+            return
+        }
+        reject(new Error('not support'))
+    })
+}