[CPictureShow.jpg]
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.
I created what I call a very *simple* and useful class. It can easily be implemented by adding it to a project. You don’t have to be a real JPEG freak and invent all the header reading from the beginning (It uses the IPicture interface jst as Internet Explorer does)
About The Project
I Was a little carried away with this “ACDSee Alike” picture viewer. As it was not my main purpose – I didn’t have the time to make it “Perfect”. If you feel lucky and want to improve it here and there – please share it.
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Picture (Implementations) Version 1.00
Routines: 4 Showing Picture Files…
(.BMP .DIB .EMF .GIF .ICO .JPG .WMF)
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COPYFREE (F) – ALL RIGHTS FREE
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class CPicture
{
public:
void FreePictureData();
BOOL Load(CString sFilePathName);
BOOL Load(UINT ResourceName, LPCSTR ResourceType);
BOOL LoadPictureData(BYTE* pBuffer, int nSize);
BOOL SaveAsBitmap(CString sFilePathName);
BOOL Show(CDC* pDC,
CPoint LeftTop,
CPoint WidthHeight,
int MagnifyX,
int MagnifyY);
BOOL Show(CDC* pDC, CRect DrawRect);
BOOL ShowBitmapResource(CDC* pDC,
const int BMPResource,
CPoint LeftTop);
BOOL UpdateSizeOnDC(CDC* pDC);
CPicture();
virtual ~CPicture();
IPicture* m_IPicture; // Same As
// LPPICTURE (typedef IPicture __RPC_FAR *LPPICTURE)
LONG m_Height; // Height (In Pixels Ignor What
// Current Device Context Uses)
LONG m_Weight; // Size Of The Image Object In
// Bytes (File OR Resource)
LONG m_Width; // Width (In Pixels Ignor What
// Current Device Context Uses)
};
//~~~~~~~~~Example & Usage 4 Dummies~~~~~~~~~~~~~~
//
// U Need 2 Add “CPicture.CPP” and “CPicture.H” Into
// Your Project (From FileView) So U Will Get Control
// Over The Functions In This Class, Then U Can Create
// a Picture Object And Show It On a Device Context
//
// CPicture m_Picture; // Create a Picture Object
// // (An Instance Of This Class)
// #include “Picture.h” // Make Sure U Include This
// // Where U Gonna Create The Object…
//
// Load Picture Data Into The IPicture Interface (.BMP
// .DIB .EMF .GIF .ICO .JPG .WMF)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// m_Picture.Load(“Test.JPG”); // Load From a File –
// // Just Load It (Show Later)
// m_Picture.Load(IDR_TEST, “JPG”); // Load From a Resource
// //- Just Load It (Show Later)
// (U Must Include IDR_TEST In Your Resources Under a Custom
// Name, 4 Example – “JPG”)
//
// When Using DC Object On a *Dialog Based* Application
// (CPaintDC dc(this);)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// m_Picture.UpdateSizeOnDC(&dc); // Get Picture Dimentions
// // In Pixels
// m_Picture.Show(&dc,
// CPoint(0,0),
// CPoint(m_Picture.m_Width, m_Picture.m_Height),
// 0,0);
// // Change Original Dimentions:
// m_Picture.Show(&dc, CRect(0,0,100,100));
// // Show Bitmap Resource:
// m_Picture.ShowBitmapResource(&dc, IDB_TEST, CPoint(0,0));
//
// OR When Using a Pointer On a “Regular” MFC Application (CDC* pDC)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// m_Picture.UpdateSizeOnDC(pDC); // Get Picture Dimentions In Pixels
// m_Picture.Show(pDC,
// CPoint(0,0),
// CPoint(m_Picture.m_Width, m_Picture.m_Height),
// 0,0);
// // Change Original Dimentions:
// m_Picture.Show(pDC, CRect(0,0,100,100));
// // Show Bitmap Resource:
// m_Picture.ShowBitmapResource(pDC, IDB_TEST, CPoint(0,0));
//
// Show Picture Information
// ~~~~~~~~~~~~~~~~~~~~~~~~
// CString S;
// S.Format(“Size = %4dnWidth = %4dnHeight = %4dnWeight = %4dn”,
// m_Picture.m_Weight,
// m_Picture.m_Width,
// m_Picture.m_Height,
// m_Picture.m_Weight);
// AfxMessageBox(S);
//
//~~~~~~~~~~~~~~~~~Cut The Bull Here~~~~~~~~~~~~~~~~~~~~~
Downloads
Download demo (SDI) project – 193Kb
Download source (CPicture class only) – 7Kb