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DX下实现图片的遮罩(Mask)

由 独自空忆成欢 提交于 2021-01-17 18:26:39
虽然传统的用含遮罩信息的24bit图片来保存一个32bit的图像已经很少见了(以前的游戏比较常见),基本上随着png的流行,已经让32bit格式的图像普及网络以及游戏界了,当然更多的游戏采用dx原生支持的dds,或者可以自定义形状的更加灵活的tga格式等.不过这里还是介绍下在DX下Mask的实现,因为我的项目里涉及到可能要使用旧的游戏资源. 储存mask信息的图片: D3DLOCKED_RECT locked_rect; temp->tex->tex->LockRect(0, &locked_rect, NULL, 0); BYTE *pByte = (BYTE *) locked_rect.pBits; BYTE *pmaskByte = (BYTE *) locked_rect.pBits + width*4; int iOffset = locked_rect.Pitch/2; //偏移字节数 int i=0; for( int iRow=0; iRow<height; iRow++ ) { for( int iCol=0; iCol<width; iCol++ ) { masked_pixel_buf[i] = pByte[0]; masked_pixel_buf[i+1] = pByte[1]; masked_pixel_buf[i+2] = pByte[2];

Converting NaN to Oracle Nulls within Python Pandas

由 孤街浪徒 提交于 2021-01-01 03:58:21
问题 I get this error on executing the below function & It is because NaN is tried to be inserted into numeric column. Replacing NaN with 0 throughout does work but replacement with None does not. Any ideas would be appreciated def insertData(table_name, schema_name, df): if not df.empty: #input_data[file].fillna(0, inplace=True) # This works but replacing with 0's is not ideal df.where(pd.notnull(df), None) #This does not work values = df.to_dict(orient='records') table = sa.Table(table_name ,

Insert null value into a text input

由 你。 提交于 2020-12-30 07:34:39
问题 I'm pretty sure it's not possible to do this but I'm still asking for it. Is there a way for a user to insert a null (or an undefined) value into an html text input? I need to distinguish between a null value and an empty string and I would like to allow the user to set this value into a single input. For what I can see across the web, the standard solution to this problem is to match the text input with a checkbox that tell if the value is null or not. From my understanding, the limitation

Insert null value into a text input

由 假如想象 提交于 2020-12-30 07:34:17
问题 I'm pretty sure it's not possible to do this but I'm still asking for it. Is there a way for a user to insert a null (or an undefined) value into an html text input? I need to distinguish between a null value and an empty string and I would like to allow the user to set this value into a single input. For what I can see across the web, the standard solution to this problem is to match the text input with a checkbox that tell if the value is null or not. From my understanding, the limitation

Insert null value into a text input

由 荒凉一梦 提交于 2020-12-30 07:28:58
问题 I'm pretty sure it's not possible to do this but I'm still asking for it. Is there a way for a user to insert a null (or an undefined) value into an html text input? I need to distinguish between a null value and an empty string and I would like to allow the user to set this value into a single input. For what I can see across the web, the standard solution to this problem is to match the text input with a checkbox that tell if the value is null or not. From my understanding, the limitation

Using NULL statement in a function parameter

由 丶灬走出姿态 提交于 2020-12-26 11:31:19
问题 I am just doing a revision task and was running into the error too few arguments to function, so I did some research and apparently can use NULL for the statement not in use. However, when I run my program all that happens is the prompt for the user to enter the 3 values then it ends. It doesn't perform the calculations. Below is my code, if anyone can help with that, it would be greatly appreciated. #include <stdio.h> #include <stdlib.h> float res_calculation (float r1, float r2, float r3,

Using NULL statement in a function parameter

由 懵懂的女人 提交于 2020-12-26 11:30:40
问题 I am just doing a revision task and was running into the error too few arguments to function, so I did some research and apparently can use NULL for the statement not in use. However, when I run my program all that happens is the prompt for the user to enter the 3 values then it ends. It doesn't perform the calculations. Below is my code, if anyone can help with that, it would be greatly appreciated. #include <stdio.h> #include <stdlib.h> float res_calculation (float r1, float r2, float r3,

Using NULL statement in a function parameter

由 坚强是说给别人听的谎言 提交于 2020-12-26 11:27:58
问题 I am just doing a revision task and was running into the error too few arguments to function, so I did some research and apparently can use NULL for the statement not in use. However, when I run my program all that happens is the prompt for the user to enter the 3 values then it ends. It doesn't perform the calculations. Below is my code, if anyone can help with that, it would be greatly appreciated. #include <stdio.h> #include <stdlib.h> float res_calculation (float r1, float r2, float r3,

window.opener用法

由 。_饼干妹妹 提交于 2020-12-26 07:56:12
在 JS 中，window. opener 只是对弹出窗口的母窗口的一个引用。比如： a.html中，通过点击按钮等方式window.open出一个新的窗口b.html。那么在b.html中，就可以通过window. opener （省略写为 opener ）来引用a.html，包括a.html的document等对象，操作a.html的内容。 假如这个引用失败，那么将返回null。所以在调用 opener 的对象前，要先判断对象是否为null，否则会出现“对象为空或者不存在”的 JS 错误。 在一般的用法中，只是用来解决关闭窗口时不提示弹出窗口， 而对它更深层的了解一般比较少。其 实 window.opener是指调用window.open方法的窗口。 在工作中主要是用来解决部分提交的。这种跨页操作对工作是非常有帮助的。 如果你在主窗口打开了一个页面，并且希望主窗口刷新就用这个，打开页面的window.opener就相当于 主窗口的window。 主窗口的刷新你可以用 window.opener.location.reload()； 如果你用虚拟的目录：如struts的*.do会提示你重试 你可以改成这样 window.opener.yourformname.submit() 就好了 2〉 在应用中有这样一个情况， 在A窗口中打开B窗口，在B窗口中操作完以后关闭B窗口

Return empty list instead of null

由 邮差的信 提交于 2020-12-25 05:27:32
问题 I want to change my current function to return empty JSON list, currently it returns nil . This is my current code: func (s *Service) projectsGet(c *gin.Context) { var projects []*models.Project user := getUser(c) pag := models.NewPagination(c) ps, err := s.db.ProjectsGet(user.ID, &pag) if err != nil { apiError(c, http.StatusInternalServerError, err) return } projects = ps c.JSON(http.StatusOK, projects) } I want it to return [] , how I can do it? 回答1: A nil slice encodes to a null JSON
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