Such as title, I am a novice, really have a small code, from the external loading a 256 color bitmap and shown in picture, use SetStretchBltMode to pull the final StretchDIBits shows, but the result is very strange, not only lost the true but also drift, ask everybody a great god this is what the moth???????

The code below

 cstrings filter; 
The filter="all files (*. BMP, JPG, *. GIF, * tiff) | *. BMP. *.jpg. *.gif; *. Tiff | BMP (*. BMP) | *. BMP | JPG (*.jpg) | *. JPG | GIF (*. GIF) | *. GIF | tiff (*. Tiff) | *. Tiff | | "; 
CFileDialog DLG (TRUE, NULL, NULL, OFN_HIDEREADONLY, filter, NULL); 

//sure button DLG. DoModal () function display dialog 
If (DLG) DoModal ()==IDOK) 
{
//the open dialog box for image information 
Cstrings BmpName=DLG. GetPathName ();//the file path name such as D: \ \ PIC ABC. BMP 
Cstrings EntName=DLG. GetFileExt ();//get file extension 
EntName. MakeLower ();//convert file extension to a lowercase characters 

If (EntName.Com pare said (_T (BMP))==0) 
{
//define variables stored image information 
BITMAPINFO * pBmpInfo;//record image detail 
BYTE * pBmpData;//image data 
BITMAPFILEHEADER bmpHeader;//file header 
BITMAPINFOHEADER bmpInfo;//information head 
CFile bmpFile;//record open file 

//to open the file read-only way read in all parts of BMP images BMP file header information data 
if(! BmpFile. Open (BmpName, CFile: : modeRead | CFile: : typeBinary)) 
return; 
If (bmpFile. Read (& amp; BmpHeader, sizeof (BITMAPFILEHEADER))!=sizeof (BITMAPFILEHEADER)) 
return; 
If (bmpFile. Read (& amp; BmpInfo, sizeof (BITMAPINFOHEADER))!=sizeof (BITMAPINFOHEADER)) 
return; 
PBmpInfo=(BITMAPINFO *) new char [sizeof (BITMAPINFOHEADER)]; 
//space for image data application 
Memcpy (pBmpInfo, & amp; BmpInfo, sizeof (BITMAPINFOHEADER));//
DWORD dataBytes=bmpHeader. BfSize - bmpHeader. BfOffBits; 
PBmpData=https://bbs.csdn.net/topics/(BYTE *) new char [dataBytes]; 
BmpFile. Read (pBmpData dataBytes); 
BmpFile. Close (); 

PBmpInfo - & gt; BmiHeader. BiBitCount=8; 

//display images 
The CWnd * pWnd=GetDlgItem (IDC_STATIC_PIC);//get the pictrue control window handle 
CRect the rect. 
PWnd - & gt; GetClientRect (& amp; The rect);//get the pictrue controls the rectangular area 
The CDC * pDC=pWnd - & gt; GetDC ();//get the pictrue controls the DC 
PDC - & gt; SetStretchBltMode (WHITEONBLACK);//COLORONCOLOR HALFTONE BLACKONWHITE WHITEONBLACK 
StretchDIBits (pDC - & gt; GetSafeHdc (), 
0, 
0, 
The rect. Width (), 
The rect. Height (), 
0, 
0, 
BmpInfo biWidth, 
BmpInfo biHeight, 
PBmpData, 
PBmpInfo, 
DIB_RGB_COLORS, 
SRCCOPY 
); 
}
}

Find a lot of posts on the net, may and pBmpInfo SetStretchBltMode, DIB_RGB_COLORS, set about, but try for a long time still can't solve the problem... Moderator said can use CImage but there is no source file...

CodePudding user response:

Settings SetBKMode (TRANSPARENT) a try?

CodePudding user response:

8-bit color and Dib bit depth below figure shows normal needs palette SelectPalette

http://blog.csdn.net/sjiang2142/article/details/6445082

CodePudding user response:

refer to the second floor zgl7903 response:

8-bit color and Dib bit depth below figure shows normal needs palette SelectPalette

http://blog.csdn.net/sjiang2142/article/details/6445082

Links to articles to see, to understand the general meaning, but will not change... It's very embarrassed...

CodePudding user response:

CStatic + CImage implement a simple picture display control

CodePudding user response:

SetStretchBltMode (dc GetSafeHdc (), HALFTONE);