C / C++ / MFC

6-Jun-06 1:18

I have two objects: CBitmap bmp1, CBitmap bmp2. There is a sample picture in the bmp1 and the same picture in the bmp2.
Now, I get a copy of the part bmp1 and put it to the CBitmap bmp3. But I don't want to create another CBitmap object. I want release bmp2 interior and put there the new part of the picture wchich is in the bmp3. How can I do it. I can't do bmp2 = bmp3, there is no function like: bmp2.Assign(bmp3).
What can I do?

Regards
mwgomez
Poland

V_shr6-Jun-06 1:31

V_shr

6-Jun-06 1:31

if you want to copy bmp3 to bmp2 you can use :
bmp2->Canvas->Draw(0,0,bmp3);

bye

ThatsAlok6-Jun-06 1:59

ThatsAlok

6-Jun-06 1:59

V_shr wrote:
bmp2->Canvas->Draw(0,0,bmp3);

Where is Canvas variable Situated?

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V_shr6-Jun-06 2:11

V_shr

6-Jun-06 2:11

you are speaking about CBitmap , do you mean Graphics::TBitmap ???

gomez_a6-Jun-06 2:26

6-Jun-06 2:26

I mean the MFC library and the CBitmap class (Visual Studio).

regards
mwgomez

ThatsAlok6-Jun-06 18:41

ThatsAlok

6-Jun-06 18:41

V_shr wrote:
do you mean Graphics::TBitmap ???

I believe Poster is refering to MFC:: CBitmap (Though MFC is not a namespace)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

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Hamid_RT6-Jun-06 2:21

6-Jun-06 2:21

Hi ThatsAlok,
maybe in future Big Grin | :-D

whitesky

ThatsAlok6-Jun-06 18:42

ThatsAlok

6-Jun-06 18:42

WhiteSky wrote:

maybe in future

I believe in 2106 when our ancestor are coding (oops thinking) Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

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Hamid_RT6-Jun-06 18:56

6-Jun-06 18:56

2106 but one question why 2106

whitesky

ThatsAlok6-Jun-06 1:59

ThatsAlok

6-Jun-06 1:59

gomez_a wrote:
CBitmap bmp1, CBitmap bmp2

what about CBitmap* PASCAL FromHandle( HBITMAP hBitmap)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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gomez_a6-Jun-06 2:43

6-Jun-06 2:43

Please, give me a suggest:
How can I get a HBITMAP, when I have only CBitmap bmp3?
I found an example:
HBITMAP hBitmap = (HBITMAP) ::LoadImage (NULL, lpszPathName,
IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_CREATEDIBSECTION);
But, my bmp3 is not from a file.

Regards
mwgomez

Hamid_RT6-Jun-06 2:52

6-Jun-06 2:52

if you have CBitmap you can use bmp3.m_hObject

whitesky

gomez_a6-Jun-06 5:24

6-Jun-06 5:24

I wrote a class in MFC (MyClass : public CWnd), in this class I have a field
CBitmap mBitmap; // not a pointer
I set the bitmap using method:
SetBitmap(UINT nIDResource)
{
return m_Bitmap.LoadBitmap(nIDResource);
}
But now I want to set the bitmap using:
SetBitmap(CBitmap *pBitmap);

I don't know how to assign (change?) CBitmap *pBitmap to CBitmap mBitmap.
This is only a practice, but I want to understand it.

Regards

Hamid_RT6-Jun-06 18:57

6-Jun-06 18:57

I dont understand you have one function SetBitmap(UINT nIDResource) now
you want to pass SetBitmap(CBitmap *pBitmap); to this function or your problem
CBitmap mBitmap

whitesky

gomez_a6-Jun-06 23:45

6-Jun-06 23:45

Suppose we have a class:

class CBitmapViewer : public CWnd
{
...

public:
CBitmap m_Bitmap; // the BMP is loaded here
CRect R; // the whole window size

public:
virtual BOOL Create(CWnd* pParentWnd, const RECT& rect, UINT nID,
DWORD dwStyle = WS_VISIBLE);
BOOL SetBitmap(UINT nIDResource);
};

I am creating the picture 1:
CRect RPicture1(10, 10, 200, 200);
mPicture1 = new CBitmapViewer();
mPicture1->Create(this, RPicture1, ID_OBRAZEK);
mPicture1->SetBitmap(IDB_BITMAP_CHILD);

I am creating the picture 2:
CRect RPicture2(10, 220, 200, 410);
mPicture2 = new CBitmapViewer();
mPicture2->Create(this, RPicture2, ID_OBRAZEK);
mPicture2->SetBitmap(IDB_BITMAP_CHILD);

There are two picture on the screen.
Now the user can mark the part of the first window.
This coorinates are placed in CRect Rf.
Now, I am cutting down a part of the picture one - using the Rf coordinates:

int mWidth = Rf.Width();
int mHeight = Rf.Height();

CBitmap bmp_part;
bmp_part.CreateBitmap(mWidth, mHeight, 1, 24, NULL);

// get the bitmap size
BITMAP bitmap_size;
bmp_part.GetObject(sizeof(BITMAP), &bitmap_size);

// get a bitmap's part from Picture1 and place them into the bmp_part
unsigned char *pData2 = new unsigned char[bitmap_size.bmHeight * bitmap_size.bmWidthBytes];
mPicture1->m_Bitmap.GetBitmapBits(bitmap_size.bmHeight * bitmap_size.bmWidthBytes, pData2);
bmp_part.SetBitmapBits(bitmap_size.bmHeight * bitmap_size.bmWidthBytes, pData2);
delete[] pData2;

/*
when I have a part of the Picture1 in the bmp_part a want to replace a Picture2 with bmp_part.
*/

For example using:
mPicture2.Assign(&bmp_part);

or I can to create the new object:

mNewBitmap = new CBitmapViewer();
mNewBitmap->Create(this, R3, ID_OBRAZEK3); // CRect R3 - where the window is placed
mNewBitmap->AssignBitmap(&bmp_part);

From this moment I want some help, becouse I don't know how to do it

Regards

Hamid_RT7-Jun-06 2:03

7-Jun-06 2:03

Hope I understood your question

<br />
void CAnswerDlg::OnBnClickedTest()<br />
{<br />
CBitmapViewer *mNewBitmap;<br />
CBitmap bmp_part;<br />
bmp_part.Attach((HBITMAP)LoadImage(AfxGetInstanceHandle(),"c:\\0.bmp",IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE|LR_CREATEDIBSECTION));<br />
<br />
CRect R3;<br />
mNewBitmap = new CBitmapViewer();<br />
mNewBitmap->Create(this, R3, 1); // CRect R3 - where the window is placed<br />
mNewBitmap->SetBitmap2(&bmp_part);<br />
mNewBitmap->DestroyWindow();<br />
<br />
/*<br />
if you use this code you see one file<br />
CImage m;<br />
m.Attach(mNewBitmap->m_Bitmap);<br />
m.Save("c:\\test.bmp");<br />
m.Detach();*/<br />
}<br />
<br />
BOOL CBitmapViewer::Create(CWnd* pParentWnd, const RECT& rect,UINT nID,DWORD dwStyle)<br />
{<br />
return CWnd::Create("CBitmapViewer","",dwStyle,rect,pParentWnd,1,0);<br />
}<br />
<br />
BOOL CBitmapViewer::SetBitmap(UINT nIDResource)<br />
{<br />
return m_Bitmap.LoadBitmap(nIDResource);<br />
}<br />
<br />
void CBitmapViewer::SetBitmap2(CBitmap *m)<br />
{<br />
	m_Bitmap.Attach((HBITMAP)m->m_hObject);<br />
}<br />

whitesky

ThatsAlok6-Jun-06 18:13

ThatsAlok

6-Jun-06 18:13

gomez_a wrote:
How can I get a HBITMAP, when I have only CBitmap bmp3?

CBitmap::operator HBITMAP

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Shared Memory Writing

velayudhan_raj6-Jun-06 1:03

velayudhan_raj

6-Jun-06 1:03

Hi Guys,
A structure,which consists of member variables ( eg: int, float data type ) is written in a shared memory from a BackEnd application, which is accessed by a Front End application. When I try to write a Cstring variable or TCHAR array as member variable of the structure, it is not working, and exception occurs. Actually my need is to write a string to shared memory - from Back end, which is accessed by Front End. The string should be a member of this structure. So plz help me what datatype to be used.

Thanks in Advance
Velayudhan

Laxman Auti6-Jun-06 1:13

Laxman Auti

6-Jun-06 1:13

velayudhan_raj wrote:
A structure,which consists of member variables ( eg: int, float data type ) is written in a shared memory from a BackEnd application, which is accessed by a Front End application. When I try to write a Cstring variable or TCHAR array as member variable of the structure, it is not working, and exception occurs. Actually my need is to write a string to shared memory - from Back end, which is accessed by Front End. The string should be a member of this structure. So plz help me what datatype to be used.

Try Char* instead. Smile | :)

Knock out 't' from can't,
You can if you think you can
Cool | :cool:

velayudhan_raj6-Jun-06 1:15

velayudhan_raj

6-Jun-06 1:15

Actually I am working in Unicode support application. so I tried with TCHAR* , but it is not working.
A doubt : CString can't be written in Shared memory, as we cannot define the size of CString , Is it correct?

ThatsAlok6-Jun-06 1:57

ThatsAlok

6-Jun-06 1:57

velayudhan_raj wrote:
Actually I am working in Unicode support application. so I tried with TCHAR* , but it is not working.

Give Specfic Size to the String Member, i.e. USE TCHAR youObj[100];

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You