	[x] Posted via EE Mobile
	Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.

09/10/2009 at 03:30PM PDT, ID: 24723128

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

3.8

How Display bitmap data (a variable, not a file) into a Picture Box with MFC or WIN32 ?

Asked by Develprog in Windows MFC Programming, Windows Programming, C++ Programming Language

Hello,
Here is my first post, so I made an application using HBITMAP with the LoadImage method () on a bmp file. But this time I would load an image, not from a file (code below) but using data in memory (see comments).

My program works like a wrapper class by calling a main class named Camdev , this class saves a bitmap file on disk -and my application used HBITMAP LoadImage() to display each image from the camera in the Picture box.
I used the code bellow and that works perfect.

But the Camdev class also has a method that saves in memory (SaveToMem ()). I don't want to save the file on disk, so I 'll save the bitmap in a memory buffer then how do it I heard about using LoadImage with parameter LR_CREATEDIBSECTION but how implement that ?

The MFC LoadBitmap() function does only load bitmaps from resource in VC++ so I decided to use LoadImage() but I don't know how?

How do I pass the bitmap data buffer so my fonctions GetcaptureImage () and DisplayImage () use this data properly with MFC or Win API methods ?

Thank you

Here's the code:

View the Solution FREE for 30 Days

         
           
             1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83:
84:
85:
86:
87:
88:
89:
90:
91:
92:
93:
94:
95:
96:
97:
98:
99:
100:
101:
102:
103:
104:
105:
106:
107:
108:
109:
110:
111:
112:
113:
114:
115:
116:
117:
118:
119:
120:
121:
122:
123:
124:
125:
126:
127:
128:
129:
130:
131:
132:
133:
134:
135:
136:
137:
138:
139:
140:
141:
142:
143:
144:
145:
146:
147:
148:
149:
150:
151:
152:
153:
154:
155:
156:
157:
158:
159:
160:
161:
162:
163:
164:
165:
166:
167:
168:
169:
170:
171:
172:
173:
174:

           
           
             //Capture Image from file (loadimage)
//
#include "stdafx.h"
 
#include "Cam_conf.h"
#include "Cam_confDlg.h"
 
 
HWND hwnd   = NULL;
 
Camdev cp;  //class
 
HBITMAP eventsavedlgdc = (HBITMAP)::LoadImage(NULL,"readframes01.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);
HDC           hMemDC;
RECT rectScaled;
int rectW;
int rectH;
 
 
 
 
void CAboutDlg::OnPaint()
{
   CPaintDC dc(this); // device context for painting
 
   CRect rc( 0, 0, 4, 8 );
 
   MapDialogRect( &rc );
   int baseUnitY = rc.bottom;
   int baseUnitX = rc.right;
   TRACE("baseUnitX = %d\n", baseUnitX);
   TRACE("baseUnitY = %d\n", baseUnitY);
   TRACE("Dans OnPaint\n"); //ajout
}
 
 
CCam_confDlg::~CCam_confDlg() //
{
 
	if (m_Picture)::DeleteObject(m_Picture);
	if (Bmp4.m_hObject)::DeleteObject(Bmp4.m_hObject);
	m_Font.DeleteObject();
	cp.StopCapture();
	cp.SaveSettingsToFile();// 
 
}
 
 
BOOL CCam_confDlg::OnInitDialog()
{
	//Set the icon for this dialog.  The framework does this automatically
	//when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);	//Set big icon
	SetIcon(m_hIcon, FALSE);//Set small icon
 
	//dimensions of the control
	m_Picture.GetWindowRect(&rectScaled);
	rectW=rectScaled.right-rectScaled.left;
	rectH=rectScaled.bottom-rectScaled.top;
	
	store=cp.Init(Gl_ip);  // utiliser l'addresse IP de l'argument
	
	SetTimer(ID_TIMER1, 90, 0);				
}
 
void CCam_confDlg::OnTimer(UINT nIDEvent) 
{
		
	CDialog::OnTimer(nIDEvent);
 
	     if (nIDEvent ==ID_TIMER1) 
		{
			TRACE("ON_TIMER_IN\n");
			UpdateData(TRUE);
 
			//KillTimer(1);
			KillTimer(ID_TIMER1);
	
			//MUTEX			
			if(!GetCaptureImage())
			{
				cm_display.Lock();	//Mutex
				if(!DisplayImage())	;				
				cm_display.Unlock();//Mutex	
			}
			SetTimer(ID_TIMER1,10,0);	
			UpdateData(FALSE);
		}		
}
 
 
			
bool CCam_confDlg::GetCaptureImage()
{
	if(!cp.GetCaptureInfo(&status, &newestframeix, &newesttimems,
						&nframes, &nprocbufs, &nusable, &nlocked, lockitems, &nlockitems))
				{	
					gx_geterror(&ecode, ebuf, sizeof(ebuf));
					return TRUE;
				}
				
	// Lock frame
	if(!cp.LockFrames(FXCAM_LOCK_RELEASE_ALL_OTHER, frame, frame)) 
	{  
		// Error occurred
		return TRUE;
	}
	
	// Read frame
	if(!cp.ReadFrame(FXCAM_READFRAME_AUTOADJUST, 0, frame, NULL, &frametimems, &newestframeix, NULL, cp.image)) 
			{
				if(nlockitems == 0) 
				{
				// Error occurred
				return TRUE;
				}
			}
			
	// Release the locked frame
	if(!cp.UnlockFrames(0, frame, frame)) 
			{
				// Error occurred
				return TRUE;
			}
		
	//save image		 //Utiliser SavetoMem vers ppm (pour stream),  vers jpg (pour snapshot)
	if(!cp.image.Save("readframes01.bmp", GX_BMP)) 
	{
		gx_geterror(&ecode, ebuf, sizeof(ebuf));
		return TRUE;
	}
	
	capture_ok=true;
	return FALSE;
}
 
bool CCam_confDlg::DisplayImage() 
{
	  capture_ok=false;	
 
	  if (eventsavedlgdc)
	  { 
	    	::DeleteObject(eventsavedlgdc);
	  }
 
	eventsavedlgdc = (HBITMAP)::LoadImage(NULL,"readframes01.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);//OK
 
	  CBitmap bmp;
	  bmp.Attach(eventsavedlgdc);
	  BITMAP bm;
	  bmp.GetBitmap(&bm);  
	  bmp.Detach(); 
 
	  HDC hdc=::GetDC(m_Picture.m_hWnd);
	  HDC memdc=::CreateCompatibleDC(hdc);
	  HBITMAP hBmp2=(HBITMAP)SelectObject(memdc,eventsavedlgdc);
  
 
	  SetStretchBltMode(hdc,COLORONCOLOR);  //For better quality
      StretchBlt(hdc,0,0,rectW,rectH,memdc,0,0,752,480,SRCCOPY); 
 
      DeleteDC(hdc);
      DeleteDC(memdc);
 
	  if(eventsavedlgdc)
	  {
			m_Picture.SetBitmap(hBmp2);
			DeleteDC(hMemDC);
			DeleteObject(eventsavedlgdc);
	  }
 
	  capture_ok=true;
	  return FALSE;
}
           
         

Keywords: How Display bitmap data (a variable,…

	Title
1	How to overlay BMP's on my Applicat…
2	Resizing width and height of a jpg, re…
3	Saving DC contents for undo/redo in …

Loading Advertisement...

20091111-EE-VQP-91 - Hierarchy / EE_QW_3_20080625

1. alb66169,318
2. Zoppo137,827
3. DanRollins122,649
4. AndyAins...120,725
5. itsmeandn...114,711
6. jkr110,517
7. pgnatyuk66,538
8. alexey_g...38,234
9. Gideon723,448
10. evilrix18,140
11. mrjoltcola16,004
12. IbanUlov10,400
13. Melange10,250
14. LordOfPo...10,010
15. Laindow8,598
16. Infinity086,936
17. JohnGaby6,900
18. Gurudenis6,450
19. etking6,300
20. mrwad995,100
21. Subrat2...4,720
22. Axter4,500
23. StefanKittel4,340
24. Kimpan4,300
25. Mikal6134,282

1. jkr1,683,816
2. AndyAins...1,306,324
3. DanRollins981,812
4. AlexFM898,543
5. mahesh1...766,818
6. Zoppo551,269
7. jaime_oliv...535,439
8. alb66500,656
9. roshmon398,655
10. chensu367,924
11. itsmeandn...350,496
12. migel331,384
13. Axter205,796
14. mikeblas205,172
15. nonubik173,670
16. Priyesh157,330
17. thui156,790
18. wayside153,409
19. VinExpert136,508
20. jhance131,433
21. hemakumar121,652
22. RONSLOW114,549
23. vijay_vis...113,503
24. KurtVon108,306
25. williamca...98,749

How Display bitmap data (a variable, not a file) into a Picture Box with MFC or WIN32 ?

Asked by Develprog in Windows MFC Programming, Windows Programming, C++ Programming Language

About this solution