www.pudn.com > student_system.rar > Picture.cpp
//-----------------------------------------------------------------------------
// Picture (Implementations) Version 1.00
//
// Routins 4 Showing Picture Files... (.BMP .DIB .EMF .GIF .ICO .JPG .WMF)
//
// Author: Dr. Yovav Gad, EMail: Sources@SuperMain.com ,Web: www.SuperMain.com
//=============================================================================
//
// Full Story:
// ~~~~~~~~~~~
// There R Many Libraries To Handle Image Files, Anyway Most Of Them Do Not
// Include Source Files Or Just Very Complicated To Implement / Understand,
//
// 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 2 Take Steps
//
// So I Created What I Call a Very *Simple* & Useful Class,
// It Can Easily Implemented By Adding It To a Project, And U 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)
//
// I Would Like To Thank Mr.Peter Hendrix For His Wonderful Work
// That I Found On: http://www.thecodeproject.com/bitmap/cpicture.asp
// Which I Was Inspired And Got The IPicture Interface Idea From...
//
// Guess U Will Find It Useful,
// Appreciate If U Can Mention My Name On Your Final Code,
// Please Feel Free To Send Me Any Improvements Or SaveAsJPG() Functions:
//
// (This Program Has No Bugs - Only Undocumented Solutions)
//
// Author: Dr. Yovav Gad, EMail: Sources@SuperMain.com ,Web: www.SuperMain.com
//
//--------------------------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);
// m_Picture.Show(&dc, CRect(0,0,100,100)); // Change Original Dimentions
// m_Picture.ShowBitmapResource(&dc, IDB_TEST, CPoint(0,0)); // Show Bitmap Resource
//
// 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);
// m_Picture.Show(pDC, CRect(0,0,100,100)); // Change Original Dimentions
// m_Picture.ShowBitmapResource(pDC, IDB_TEST, CPoint(0,0)); // Show Bitmap Resource
//
// Show Picture Information
// ~~~~~~~~~~~~~~~~~~~~~~~~
// CString S;
// S.Format("Size = %4d\nWidth = %4d\nHeight = %4d\nWeight = %4d\n",
// m_Picture.m_Weight, m_Picture.m_Width, m_Picture.m_Height, m_Picture.m_Weight);
// AfxMessageBox(S);
//
//----------------------------Cut The Bullshit Here----------------------------
#include "stdafx.h"
#include "Picture.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define HIMETRIC_INCH 2540
#define ERROR_TITLE "CPicture Error" // Error Title (Related To This Class)...
//-----------------------------------------------------------------------------
// Does: Constructor - Create a New CPicture Object To Hold Picture Data
// ~~~~
//
//-----------------------------------------------------------------------------
CPicture::CPicture()
//=============================================================================
{
m_IPicture = NULL;
m_Height = 0;
m_Weight = 0;
m_Width = 0;
}
//-----------------------------------------------------------------------------
// Does: Destructor - Free Data And Information From The CPicture Object
// ~~~~
//
//-----------------------------------------------------------------------------
CPicture::~CPicture()
//=============================================================================
{
if(m_IPicture != NULL) FreePictureData(); // Important - Avoid Leaks...
}
//-----------------------------------------------------------------------------
// Does: Free The Allocated Memory That Holdes The IPicture Interface Data
// ~~~~ And Clear Picture Information
//
// Note: This Might Also Be Useful If U Only Need To Show The Picture Once
// ~~~~~ Or If U Copy The Picture To The Device Context, So It Can Still
// Remain On Screen - But IPicture Data Is Not Needed No More
//
//-----------------------------------------------------------------------------
void CPicture::FreePictureData()
//=============================================================================
{
if(m_IPicture != NULL)
{
m_IPicture->Release();
m_IPicture = NULL;
m_Height = 0;
m_Weight = 0;
m_Width = 0;
}
}
//-----------------------------------------------------------------------------
// Does: Open a Resource And Load It Into IPicture (Interface)
// ~~~~ (.BMP .DIB .EMF .GIF .ICO .JPG .WMF)
//
// Note: When Adding a Bitmap Resource It Would Automatically Show On "Bitmap"
// ~~~~ This NOT Good Coz We Need To Load It From a Custom Resource "BMP"
// To Add a Custom Rresource: Import Resource -> Open As -> Custom
// (Both .BMP And .DIB Should Be Found Under "BMP")
//
// InPut: ResourceName - As a UINT Defined (Example: IDR_PICTURE_RESOURCE)
// ~~~~~ ResourceType - Type Name (Example: "JPG")
//
// OutPut: TRUE If Succeeded...
// ~~~~~~
//-----------------------------------------------------------------------------
BOOL CPicture::Load(UINT ResourceName, LPCSTR ResourceType)
//=============================================================================
{
BOOL bResult = FALSE;
HGLOBAL hGlobal = NULL;
HRSRC hSource = NULL;
LPVOID lpVoid = NULL;
int nSize = 0;
if(m_IPicture != NULL) FreePictureData(); // Important - Avoid Leaks...
hSource = FindResource(AfxGetResourceHandle(), MAKEINTRESOURCE(ResourceName), ResourceType);
if(hSource == NULL)
{
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "FindResource() Failed\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
hGlobal = LoadResource(AfxGetResourceHandle(), hSource);
if(hGlobal == NULL)
{
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "LoadResource() Failed\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
lpVoid = LockResource(hGlobal);
if(lpVoid == NULL)
{
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "LockResource() Failed\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
nSize = (UINT)SizeofResource(AfxGetResourceHandle(), hSource);
if(LoadPictureData((BYTE*)hGlobal, nSize)) bResult = TRUE;
UnlockResource(hGlobal); // 16Bit Windows Needs This
FreeResource(hGlobal); // 16Bit Windows Needs This (32Bit - Automatic Release)
m_Weight = nSize; // Update Picture Size Info...
if(m_IPicture != NULL) // Do Not Try To Read From Memory That Is Not Exist...
{
m_IPicture->get_Height(&m_Height);
m_IPicture->get_Width(&m_Width);
// Calculate Its Size On a "Standard" (96 DPI) Device Context
m_Height = MulDiv(m_Height, 96, HIMETRIC_INCH);
m_Width = MulDiv(m_Width, 96, HIMETRIC_INCH);
}
else // Picture Data Is Not a Known Picture Type
{
m_Height = 0;
m_Width = 0;
bResult = FALSE;
}
return(bResult);
}
//-----------------------------------------------------------------------------
// Does: Open a File And Load It Into IPicture (Interface)
// ~~~~ (.BMP .DIB .EMF .GIF .ICO .JPG .WMF)
//
// InPut: sFilePathName - Path And FileName Target To Save
// ~~~~~
//
// OutPut: TRUE If Succeeded...
// ~~~~~~
//-----------------------------------------------------------------------------
BOOL CPicture::Load(CString sFilePathName)
//=============================================================================
{
BOOL bResult = FALSE;
CFile PictureFile;
CFileException e;
int nSize = 0;
if(m_IPicture != NULL) FreePictureData(); // Important - Avoid Leaks...
if(PictureFile.Open(sFilePathName, CFile::modeRead | CFile::typeBinary, &e))
{
nSize = PictureFile.GetLength();
BYTE* pBuffer = new BYTE[nSize];
if (PictureFile.Read(pBuffer, nSize) > 0 ) //从文件读到pBuffer
{ if(LoadPictureData(pBuffer, nSize)) bResult = TRUE; }//接作调用函数读pBuffer
PictureFile.Close();
delete [] pBuffer;
}
else // Open Failed...
{
TCHAR szCause[255];
e.GetErrorMessage(szCause, 255, NULL);
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, szCause, ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
bResult = FALSE;
}
m_Weight = nSize; // Update Picture Size Info...
if(m_IPicture != NULL) // Do Not Try To Read From Memory That Is Not Exist...
{
m_IPicture->get_Height(&m_Height);
m_IPicture->get_Width(&m_Width);
// Calculate Its Size On a "Standard" (96 DPI) Device Context
m_Height = MulDiv(m_Height, 96, HIMETRIC_INCH);
m_Width = MulDiv(m_Width, 96, HIMETRIC_INCH);
}
else // Picture Data Is Not a Known Picture Type
{
m_Height = 0;
m_Width = 0;
bResult = FALSE;
}
return(bResult);
}
//-----------------------------------------------------------------------------
// Does: Read The Picture Data From a Source (File / Resource)
// ~~~~ And Load It Into The Current IPicture Object In Use
//
// InPut: Buffer Of Data Source (File / Resource) And Its Size
// ~~~~~
//
// OutPut: Feed The IPicture Object With The Picture Data
// ~~~~~~ (Use Draw Functions To Show It On a Device Context)
// TRUE If Succeeded...
//-----------------------------------------------------------------------------
BOOL CPicture::LoadPictureData(BYTE *pBuffer, int nSize)
//=============================================================================
{
BOOL bResult = FALSE;
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, nSize);
if(hGlobal == NULL)
{
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "Can not allocate enough memory\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
void* pData = GlobalLock(hGlobal);
memcpy(pData, pBuffer, nSize);
GlobalUnlock(hGlobal);
IStream* pStream = NULL;
if(CreateStreamOnHGlobal(hGlobal, TRUE, &pStream) == S_OK)
{
HRESULT hr;
if((hr = OleLoadPicture(pStream, nSize, FALSE, IID_IPicture, (LPVOID *)&m_IPicture)) == E_NOINTERFACE)
{
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "IPicture interface is not supported\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
else // S_OK
{
pStream->Release();
pStream = NULL;
bResult = TRUE;
}
}
FreeResource(hGlobal); // 16Bit Windows Needs This (32Bit - Automatic Release)
return(bResult);
}
//-----------------------------------------------------------------------------
// Does: Draw The Loaded Picture Direct To The Client DC
// ~~~~
//
// Note: Bigger OR Smaller Dimentions Than The Original Picture Size
// ~~~~ Will Draw The Picture Streached To Its New Given NEW Dimentions...
//
// InPut: pDC - Given DC To Draw On
// ~~~~~ DrawRect - Dimentions Of The Picture To Draw (As a Rectangle)
//
// OutPut: TRUE If Succeeded...
// ~~~~~~
//-----------------------------------------------------------------------------
BOOL CPicture::Show(CDC *pDC, CRect DrawRect)
//=============================================================================
{
if (pDC == NULL || m_IPicture == NULL) return FALSE;
long Width = 0;
long Height = 0;
m_IPicture->get_Width(&Width);
m_IPicture->get_Height(&Height);
HRESULT hrP = NULL;
hrP = m_IPicture->Render(pDC->m_hDC,
DrawRect.left, // Left
DrawRect.top, // Top
DrawRect.right - DrawRect.left, // Right
DrawRect.bottom - DrawRect.top, // Bottom
0,
Height,
Width,
-Height,
&DrawRect);
if (SUCCEEDED(hrP)) return(TRUE);
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "Can not allocate enough memory\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
//-----------------------------------------------------------------------------
// Does: Draw The Loaded Picture Direct To The Client DC
// ~~~~
//
// Note: Bigger OR Smaller Dimentions Than The Original Picture Size
// ~~~~ Will Draw The Picture Streached To Its New Given Dimentions...
//
// InPut: pDC - Given DC To Draw On
// ~~~~~ LeftTop - Opening Point To Start Drawing (Left,Top)
// WidthHeight - Dimentions Of The Picture To Draw (Width,Height)
// MagnifyX - Magnify Pixel Width, 0 = Default (No Magnify)
// MagnifyY - Magnify Pixel Height, 0 = Default (No Magnify)
//
// OutPut: TRUE If Succeeded...
// ~~~~~~
//-----------------------------------------------------------------------------
BOOL CPicture::Show(CDC *pDC, CPoint LeftTop, CPoint WidthHeight, int MagnifyX, int MagnifyY)
//=============================================================================
{
if (pDC == NULL || m_IPicture == NULL) return FALSE;
long Width = 0;
long Height = 0;
m_IPicture->get_Width(&Width);
m_IPicture->get_Height(&Height);
if(MagnifyX == NULL) MagnifyX = 0;
if(MagnifyY == NULL) MagnifyY = 0;
MagnifyX = int(MulDiv(Width, pDC->GetDeviceCaps(LOGPIXELSX), HIMETRIC_INCH) * MagnifyX);
MagnifyY = int(MulDiv(Height,pDC->GetDeviceCaps(LOGPIXELSY), HIMETRIC_INCH) * MagnifyY);
CRect DrawRect(LeftTop.x, LeftTop.y, MagnifyX, MagnifyY);
HRESULT hrP = NULL;
hrP = m_IPicture->Render(pDC->m_hDC,
LeftTop.x, // Left
LeftTop.y, // Top
WidthHeight.x +MagnifyX, // Width
WidthHeight.y +MagnifyY, // Height
0,
Height,
Width,
-Height,
&DrawRect);
if(SUCCEEDED(hrP)) return(TRUE);
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "Can not allocate enough memory\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
return(FALSE);
}
//-----------------------------------------------------------------------------
// Does: Saves The Picture That Is Stored In The IPicture Object As a Bitmap
// ~~~~ (Converts From Any Known Picture Type To a Bitmap / Icon File)
//
// InPut: sFilePathName - Path And FileName Target To Save
// ~~~~~
//
// OutPut: TRUE If Succeeded...
// ~~~~~~
//-----------------------------------------------------------------------------
BOOL CPicture::SaveAsBitmap(CString sFilePathName)
//=============================================================================
{
BOOL bResult = FALSE;
ILockBytes *Buffer = 0;
IStorage *pStorage = 0;
IStream *FileStream = 0;
BYTE *BufferBytes;
STATSTG BytesStatistics;
DWORD OutData;
long OutStream;
CFile BitmapFile; CFileException e;
double SkipFloat = 0;
DWORD ByteSkip = 0;
_ULARGE_INTEGER RealData;
CreateILockBytesOnHGlobal(NULL, TRUE, &Buffer); // Create ILockBytes Buffer
HRESULT hr = ::StgCreateDocfileOnILockBytes(Buffer,
STGM_SHARE_EXCLUSIVE | STGM_CREATE | STGM_READWRITE, 0, &pStorage);
hr = pStorage->CreateStream(L"PICTURE",
STGM_SHARE_EXCLUSIVE | STGM_CREATE | STGM_READWRITE, 0, 0, &FileStream);
m_IPicture->SaveAsFile(FileStream, TRUE, &OutStream); // Copy Data Stream
FileStream->Release();
pStorage->Release();
Buffer->Flush();
// Get Statistics For Final Size Of Byte Array
Buffer->Stat(&BytesStatistics, STATFLAG_NONAME);
// Cut UnNeeded Data Coming From SaveAsFile() (Leave Only "Pure" Picture Data)
SkipFloat = (double(OutStream) / 512); // Must Be In a 512 Blocks...
if(SkipFloat > DWORD(SkipFloat)) ByteSkip = (DWORD)SkipFloat + 1;
else ByteSkip = (DWORD)SkipFloat;
ByteSkip = ByteSkip * 512; // Must Be In a 512 Blocks...
// Find Difference Between The Two Values
ByteSkip = (DWORD)(BytesStatistics.cbSize.QuadPart - ByteSkip);
// Allocate Only The "Pure" Picture Data
RealData.LowPart = 0;
RealData.HighPart = 0;
RealData.QuadPart = ByteSkip;
BufferBytes = (BYTE*)malloc(OutStream);
if(BufferBytes == NULL)
{
Buffer->Release();
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, "Can not allocate enough memory\t", ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
}
Buffer->ReadAt(RealData, BufferBytes, OutStream, &OutData);
if(BitmapFile.Open(sFilePathName, CFile::typeBinary | CFile::modeCreate | CFile::modeWrite, &e))
{
BitmapFile.Write(BufferBytes, OutData);
BitmapFile.Close();
bResult = TRUE;
}
else // Write File Failed...
{
TCHAR szCause[255];
e.GetErrorMessage(szCause, 255, NULL);
HWND hWnd = AfxGetApp()->GetMainWnd()->m_hWnd;
MessageBoxEx(hWnd, szCause, ERROR_TITLE, MB_OK | MB_ICONSTOP, LANG_ENGLISH);
bResult = FALSE;
}
Buffer->Release();
free(BufferBytes);
return(bResult);
}
//-----------------------------------------------------------------------------
// Does: Draw a Bitmap Resource To The Client DC (Using Bitblt())
// ~~~~ It Will Use The Bitmap Resource Original Size (Width And Height)
// (.BMP .DIB)
//
// Note: This Function Is Just Another Simple Way Of Displaying a Bitmap Resource,
// ~~~~ It Is Not Connected With The IPicture Interface And Can Be Used
// As a StandAlone On Any Device Context (Directly)
//
// InPut: BMPResource - Resource Name As Defined In The Resources
// ~~~~~ pDC - Given DC To Draw On
// LeftTop - Opening Point To Start Drawing (Left,Top)
//
// OutPut: TRUE If Succeeded...
// ~~~~~~
//-----------------------------------------------------------------------------
BOOL CPicture::ShowBitmapResource(CDC *pDC, const int BMPResource, CPoint LeftTop)
//=============================================================================
{
if (pDC == NULL) return(FALSE);
CBitmap BMP;
if(BMP.LoadBitmap(BMPResource))
{
// Get Bitmap Details
BITMAP BMPInfo;
BMP.GetBitmap(&BMPInfo);
// Create An In-Memory DC Compatible With The Display DC We R Gonna Paint On
CDC DCMemory;
DCMemory.CreateCompatibleDC(pDC);
// Select The Bitmap Into The In-Memory DC
CBitmap* pOldBitmap = DCMemory.SelectObject(&BMP);
// Copy Bits From The In-Memory DC Into The On-Screen DC
pDC->BitBlt(LeftTop.x, LeftTop.y, BMPInfo.bmWidth, BMPInfo.bmHeight, &DCMemory, 0, 0, SRCCOPY);
DCMemory.SelectObject(pOldBitmap); // (As Shown In MSDN Example...)
}
else
{
TRACE0("ERROR: Can Not Find The Bitmap Resource\n");
return(FALSE);
}
return(TRUE);
}
//-----------------------------------------------------------------------------
// Does: Get The Original Picture Pixel Size (Ignor What Current DC Is Using)
// ~~~~ Pointer To a Device Context Is Needed For Pixel Calculation,
//
// Also Updates The Class's Height And Width Properties,
// (Coz Till Now We Had No Device Context To Work With...96 DPI Assumed)
//
// InPut: The Client DC (Needed To Check The Size Of The Pixels)
// ~~~~~
//
// OutPut: TRUE If Succeeded...
// ~~~~~~
//-----------------------------------------------------------------------------
BOOL CPicture::UpdateSizeOnDC(CDC *pDC)
//=============================================================================
{
if(pDC == NULL || m_IPicture == NULL) { m_Height = 0; m_Width = 0; return(FALSE); };
m_IPicture->get_Height(&m_Height);
m_IPicture->get_Width(&m_Width);
// Get Current DPI - Dot Per Inch
int CurrentDPI_X = pDC->GetDeviceCaps(LOGPIXELSX);
int CurrentDPI_Y = pDC->GetDeviceCaps(LOGPIXELSY);
// Use a "Standard" Print (When Printing)
if(pDC->IsPrinting())
{
CurrentDPI_X = 96;
CurrentDPI_Y = 96;
}
m_Height = MulDiv(m_Height, CurrentDPI_Y, HIMETRIC_INCH);
m_Width = MulDiv(m_Width, CurrentDPI_X, HIMETRIC_INCH);
return(TRUE);
}