CodeProject: CPicture - The Yovav (Horror) PictureShow. Free source code and programming help

After many days of searching (and not finding) a way to load a JPG from a resource and show it on a dialog based application, I decided to take steps

So I created what I call a very simple and useful class, it can easily be implemented by adding it to a project, and you do not have to be a real JPEG freak and invent all header reading from the beginning (it uses the IPicture interface - same way as Internet Explorer does)

About The Project

I was little carried away with this "ACDSee alike" picture viewer, as it was not my main purpose - I did not have the time to make it "perfect", if you feel lucky and want to improve it here and there then please share it with me.

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image in case of dialog box apps

Sadru

21:29 1 Mar '09

The code for dialog box:

void cLiveJPEG::OnPaint()
{

CPaintDC dc(this); // device context for painting
CRect rect;
GetDlgItem(IDC_STATIC_MJPEGWIN)->GetClientRect(&rect);
CWnd *pWnd = (CWnd*)GetDlgItem(IDC_STATIC_MJPEGWIN);
if (pWnd){
CDC *pDC = pWnd->GetDC();
CMemDC cDC(pDC);

m_cPict->Show(&cDC, rect);
}

}

#ifndef _MEMDC_H_
#define _MEMDC_H_

//////////////////////////////////////////////////
// CMemDC - memory DC
//
// Author: Keith Rule
// Email: keithr@europa.com
// Copyright 1996-1999, Keith Rule
//
// You may freely use or modify this code provided this
// Copyright is included in all derived versions.
//
// History - 10/3/97 Fixed scrolling bug.
// Added print support. - KR
//
// 11/3/99 Fixed most common complaint. Added
// background color fill. - KR
//
// 11/3/99 Added support for mapping modes other than
// MM_TEXT as suggested by Lee Sang Hun. - KR
//
// This class implements a memory Device Context which allows
// flicker free drawing.

class CMemDC : public CDC {
private:
CBitmap m_bitmap; // Offscreen bitmap
CBitmap* m_oldBitmap; // bitmap originally found in CMemDC
CDC* m_pDC; // Saves CDC passed in constructor
CRect m_rect; // Rectangle of drawing area.
BOOL m_bMemDC; // TRUE if CDC really is a Memory DC.
public:

CMemDC(CDC* pDC, const CRect* pRect = NULL) : CDC()
{
ASSERT(pDC != NULL);

// Some initialization
m_pDC = pDC;
m_oldBitmap = NULL;
m_bMemDC = !pDC->IsPrinting();

// Get the rectangle to draw
if (pRect == NULL) {
pDC->GetClipBox(&m_rect);
} else {
m_rect = *pRect;
}

if (m_bMemDC) {
// Create a Memory DC
CreateCompatibleDC(pDC);
pDC->LPtoDP(&m_rect);

m_bitmap.CreateCompatibleBitmap(pDC, m_rect.Width(), m_rect.Height());
m_oldBitmap = SelectObject(&m_bitmap);

SetMapMode(pDC->GetMapMode());
pDC->DPtoLP(&m_rect);
SetWindowOrg(m_rect.left, m_rect.top);
} else {
// Make a copy of the relevent parts of the current DC for printing
m_bPrinting = pDC->m_bPrinting;
m_hDC = pDC->m_hDC;
m_hAttribDC = pDC->m_hAttribDC;
}

// Fill background
FillSolidRect(m_rect, pDC->GetBkColor());
}

~CMemDC()
{
if (m_bMemDC) {
// Copy the offscreen bitmap onto the screen.
m_pDC->BitBlt(m_rect.left, m_rect.top, m_rect.Width(), m_rect.Height(),
this, m_rect.left, m_rect.top, SRCCOPY);

//Swap back the original bitmap.
SelectObject(m_oldBitmap);
} else {
// All we need to do is replace the DC with an illegal value,
// this keeps us from accidently deleting the handles associated with
// the CDC that was passed to the constructor.
m_hDC = m_hAttribDC = NULL;
}
}

// Allow usage as a pointer
CMemDC* operator->()
{
return this;
}

// Allow usage as a pointer
operator CMemDC*()
{
return this;
}
};

#endif

How to rotate ?

hujunxi

17:04 8 May '08

In MS PowerPoint, Big picture(4MB Jpg) can be rotated really fast. I was wondering if PowerPoint is using IPicture. Anybody please give me a clue? Hu
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Just one word

Demian Panello

16:17 7 Jun '07

Useful. Demian. "I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone." -Bjarne Stroustrup, computer science professor, designer of C++ programming language (1950- )
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Thanks

Kaworu2

23:34 21 Mar '06

Hi, Thanks you for CPicture class, I derived it from CStatic and now I can place a CStatic image in my dialog resource editor to put the final place and size of the image, borders, ..., it help me a lot of. Bye.
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How do i use it for IDC_STATIC control?

etboite

23:05 10 Nov '05

I want to put image to IDC_STATIC control.
How do I use it ?
This is my code below, but it display nothing.:(

bool bGetBitmap = false;
OnPaint()
{
if (bGetBitmap) {
CStatic *pStaic;
pStaic=(CStatic*)GetDlgItem(IDC_STATIC_BITMAP);
CDC *pDc;

pDc = pStaic->GetDC();
CRect ClientArea;
pStaic->GetWindowRect(&ClientArea);
m_Picture.UpdateSizeOnDC(pDc);
m_Picture.Show(pDc,CRect(0,0,ClientArea.Width(),ClientArea.Height()));
}
}

OnButton1()
{
bGetBitmap = true;
m_Picture.Load("C:\\123.bmp");
Invalidate();
}

1.33/5

Re: How do i use it for IDC_STATIC control?

K(arl)

21:56 23 Feb '06

I would rather derivate a class from CStatic, catch the WM_PAINT message and there process the drawing using m_Picture. Pull the tapeworm out of your ass Fold with us! ¤ flickr
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Re: How do i use it for IDC_STATIC control?

serup

4:52 18 Sep '08

do like this : CRect m_ClientRect; m_ctlFOTO.GetClientRect(&m_ClientRect); m_Picture.Show(m_ctlFOTO.GetWindowDC(), m_ClientRect); *** m_ctlFOTO is a control variable for the static container
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Displaying big images (need ScrollBar)

angel420

14:27 18 Aug '05

Hi, I am using these great classes to display images with Visual C++ .Net. The only thing is when I load a big image, I would need some scrollbar on the side to be able to look at the entire picture, do anyone would know how to do that ? Thanks
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Pixel value ?

angel420

14:42 17 Aug '05

Hi, I am looking for a way to obtain the pixels value of the loaded image, do you have any idea ? Thanks a lot !
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Re: Pixel value ?

Christian Graus

15:39 17 Aug '05

The slow way is the GetPixel method, the fast way is to load your image into a DIBSection and traverse the bits. Christian Graus - Microsoft MVP - C++
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Re: Pixel value ?

angel420

14:01 18 Aug '05

Thanks a lot, both of the method works great !
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Nice Class

ThatsAlok

20:05 8 Jun '05

It too searching the way to load different image format from the RESOURCE. thanks "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow cheers, Alok Gupta
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CPicture to HBITMAP

naragana

16:36 23 May '05

Add this member function to class CPicture.

// Caller should call ::DeletecObject(hbitmap_got) later.
HBITMAP CPicture::GetBitmap(CDC* pDC)
{
HBITMAP hbitmap = NULL;

if(m_pPicture != NULL)
{
CSize size = GetSize(pDC);
HDC hdc = ::CreateCompatibleDC(pDC->GetSafeHdc());
if(hdc)
{
hbitmap = ::CreateCompatibleBitmap(hdc, size.cx, size.cy);
if(hbitmap)
{
HBITMAP hbitmapOld = (HBITMAP) ::SelectObject(hdc, hbitmap);
Draw( CDC::FromHandle(hdc) );
::SelectObject(hdc, hbitmapOld);
}
::DeleteDC(hdc);
}
}

return hbitmap;
}

Re: CPicture to HBITMAP

ThatsAlok

1:46 20 Jun '05

naragana wrote:
Add this member function to class CPicture.

What about this code

BOOL CPicture::GetBitmap(CBitmap *retBitmap)
{

	//check is we got IPicture Interface
	if(!m_IPicture)
		return FALSE;

	//Now retrieve HANDLE of currently selected bitmap
	
	OLE_HANDLE hPic;
	
	m_IPicture->get_Handle(&hPic);
	
	retBitmap=CBitmap::FromHandle((HBITMAP)hPic);
	

	return TRUE;

	
}

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

cheers,
Alok Gupta

bug in CPictureShowDoc::CreateFilesList

shay cohen

23:22 4 Apr '05

I got a runtime error when the program was executing the CPictureShowDoc::CreateFilesList
function. there is a missing call to m_Finder.FindNextFile()
Here is the correct code:

BOOL CPictureShowDoc::CreateFilesList()
//=============================================================================
{
m_Finding = m_Finder.FindFile("*.*"); // Finds All Files (By Name)

m_Finder.FindNextFile(); The missing line

CString Extention;
...
...
Besides the code works perfectly
Thanks
Smile

Help!!!!!

subbuviv

0:24 31 Mar '05

hi, i am computer engineering student. i have to build a basic graphics editor similar to paint as part of my project. i would like to know how i could save the images created with the editor in jpg or gif formats? i am using bc++ 5.03 and the Dev c++ compilers thanks... please do mail me a copy of your response to captain_napalm@hotmail.com
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change pictures in Dialog

olis

5:31 7 Feb '05

How can I change pictures in my Dialog, show different pictures? For example, by pressing button OK.
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Rotating an Image

Alex Evans

17:42 3 Jan '05

Any idea, how can I ROTATE 90, 180 etc using an IPicture object, once it is loaded and showing on screen... Thanks Alex
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Re: Rotating an Image

EinsteinJ

0:53 26 Sep '05

Alow, Usually i extract all the information from the loaded picture into a dib files. Than the extracted information i put in 2 dimension matrix. Having that matrix containing all the data, i will make calculation about matrix transformation to rotate it, inverse or anything hope this will help cheers,
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Loading a picture from an ftp site

rgarf

4:48 3 Sep '04

When I call the CPicture::Load function and pass in as the file name an image from an ftp site if fails to open the image. What do I have to do inorder to allow for the opening of an image from an ftp site? Thanks for your help
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problem in image compression in database

KRANTHI KUMAR KUKKALA

4:45 31 Aug '04

i am doing a project in vc++, that is "Automated attendency system using Fingerprints".the storage of fingerprints bitmap images in database is taking more space ,so i want to need help of compression images and store that in database. K.kranthi kumar
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how to get image data as pixels?

sgorgulu

4:15 23 Aug '04

Hi, I wanna ask about getting raw image data pixel by pixel, such as a matrix, no no exactly as a matrix. I wanna process image data. Thanx for help... (if u can, please quick, i'm in hurry ) GORGULUS
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helloo sir one problem

ThatsAlok

1:52 17 Jul '04

how to save the bitmap image into jpeg image. thanks in advance ----------------------------- "I Think It will Work" Formerly Known As "Alok The Programmer" at CP ----------------------------- Alok Gupta visit me at http://www.thisisalok.tk
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IPictute and HBitmap

Mirikos

11:25 22 Jun '04

How can i attach HBitmap to IPicture object?
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Re: IPictute and HBitmap

mcanti

23:05 29 May '06

Found here: http://desktop.google.com/framework.html


    // Do the conversion from a HBITMAP to IPicture
    PICTDESC picture_desc;
    picture_desc.cbSizeofstruct = sizeof(picture_desc);
    picture_desc.picType = PICTYPE_BITMAP;
    picture_desc.bmp.hbitmap = bitmap;
    picture_desc.bmp.hpal = NULL;
    HRESULT hr = OleCreatePictureIndirect(&picture_desc, IID_IPicture, TRUE, 
      (void**)&tile_icon);
    if (FAILED(hr))
      return E_FAIL;

Last Visit: 0:58 23 Nov '09 Last Update: 0:58 23 Nov '09

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