Wince贴图 显示png wince GDI图片显示半透明

// TEST_PNG.cpp : Defines the entry point for the application.
//


#include "stdafx.h"
#include "TEST_PNG.h"
#include <windows.h>
#include <commctrl.h>
#include "Imaging.h"


#include <initguid.h>
#include <imgguids.h> 


#pragma comment (lib,"Ole32.lib")


#define MAX_LOADSTRING 100


// Global Variables:
HINSTANCE g_hInst;// current instance
HWND g_hWndCommandBar;// command bar handle
HWND g_hWnd;


// Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE, LPTSTR);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
void DrawImage(HDC hdc,const void *buffer,UINT size,LPCRECT rect);
void DrawImage2(HWND hwnd,LPCWSTR lpName,LPCWSTR lpType,int left,int top);




int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPTSTR    lpCmdLine,
                   int       nCmdShow)
{
MSG msg;


// Perform application initialization:
if (!InitInstance(hInstance, nCmdShow)) 
{
return FALSE;
}


HACCEL hAccelTable;
hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_TEST_PNG));


MessageBox(g_hWnd,_T("Ei:请用键盘，请按键盘的任意按键去载入png，按一次载入并且显示一次"),_T("Ei提示"),MB_OK);
// Main message loop:
while (GetMessage(&msg, NULL, 0, 0)) 
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) 
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}


return (int) msg.wParam;
}


//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
ATOM MyRegisterClass(HINSTANCE hInstance, LPTSTR szWindowClass)
{
WNDCLASS wc;


wc.style         = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc   = WndProc;
wc.cbClsExtra    = 0;
wc.cbWndExtra    = 0;
wc.hInstance     = hInstance;
wc.hIcon         = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_TEST_PNG));
wc.hCursor       = 0;
wc.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
wc.lpszMenuName  = 0;
wc.lpszClassName = szWindowClass;


return RegisterClass(&wc);
}


//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
    HWND hWnd;
    TCHAR szTitle[MAX_LOADSTRING]; // title bar text
    TCHAR szWindowClass[MAX_LOADSTRING]; // main window class name


    g_hInst = hInstance; // Store instance handle in our global variable




    LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING); 
    LoadString(hInstance, IDC_TEST_PNG, szWindowClass, MAX_LOADSTRING);




    if (!MyRegisterClass(hInstance, szWindowClass))
    {
    return FALSE;
    }


    hWnd = CreateWindow(szWindowClass, szTitle, WS_VISIBLE,
        CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);


    if (!hWnd)
    {
        return FALSE;
    }




g_hWnd=hWnd;
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);


    if (g_hWndCommandBar)
    {
        CommandBar_Show(g_hWndCommandBar, TRUE);
    }


//::DrawImage(HDC hdc,const void *buffer,UINT size,LPCRECT rect);
    return TRUE;
}


//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND - process the application menu
//  WM_PAINT - Paint the main window
//  WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    HDC hdc;



    switch (message) 
    {
        case WM_COMMAND:
            wmId    = LOWORD(wParam); 
            wmEvent = HIWORD(wParam); 
            // Parse the menu selections:
            switch (wmId)
            {
                case IDM_HELP_ABOUT:
                    DialogBox(g_hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, About);
                    break;
                case IDM_FILE_EXIT:
                    DestroyWindow(hWnd);
                    break;
                default:
                    return DefWindowProc(hWnd, message, wParam, lParam);
            }
            break;
        case WM_CREATE:
            g_hWndCommandBar = CommandBar_Create(g_hInst, hWnd, 1);
            CommandBar_InsertMenubar(g_hWndCommandBar, g_hInst, IDR_MENU, 0);
            CommandBar_AddAdornments(g_hWndCommandBar, 0, 0);
            break;
        case WM_PAINT:
            hdc = BeginPaint(hWnd, &ps);
            
//::LoaResourceImage(g_hWnd, MAKEINTRESOURCE(IDR_PNG1), TEXT("PNG"), 0, 0, 0, 50,50);
            // TODO: Add any drawing code here...


            EndPaint(hWnd, &ps);
            break;
        case WM_DESTROY:
            CommandBar_Destroy(g_hWndCommandBar);
            PostQuitMessage(0);
            break;


case WM_KEYDOWN:
DrawImage2(g_hWnd,MAKEINTRESOURCE(IDR_PNG1),_T("PNG"),rand()%1000,rand()%600);
break;




        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}


// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        case WM_INITDIALOG:
            RECT rectChild, rectParent;
            int DlgWidth, DlgHeight; // dialog width and height in pixel units
            int NewPosX, NewPosY;


            // trying to center the About dialog
            if (GetWindowRect(hDlg, &rectChild)) 
            {
                GetClientRect(GetParent(hDlg), &rectParent);
                DlgWidth = rectChild.right - rectChild.left;
                DlgHeight = rectChild.bottom - rectChild.top ;
                NewPosX = (rectParent.right - rectParent.left - DlgWidth) / 2;
                NewPosY = (rectParent.bottom - rectParent.top - DlgHeight) / 2;

                // if the About box is larger than the physical screen 
                if (NewPosX < 0) NewPosX = 0;
                if (NewPosY < 0) NewPosY = 0;
                SetWindowPos(hDlg, 0, NewPosX, NewPosY,
                    0, 0, SWP_NOZORDER | SWP_NOSIZE);
            }
            return (INT_PTR)TRUE;


        case WM_COMMAND:
            if ((LOWORD(wParam) == IDOK) || (LOWORD(wParam) == IDCANCEL))
            {
                EndDialog(hDlg, LOWORD(wParam));
                return TRUE;
            }
            break;


        case WM_CLOSE:
            EndDialog(hDlg, message);
            return TRUE;


    }
    return (INT_PTR)FALSE;
}




//***************************************************************************************
//函数:DrawImage2
//目的: 解码并显示PNG图片


//***************************************************************************************




void DrawImage2(HWND hwnd,LPCWSTR lpName,LPCWSTR lpType,int left,int top)
{
HDC hdc=GetDC(g_hWnd);
HMODULE hModule_Current=GetModuleHandle(NULL);


HRSRC hr=FindResource(hModule_Current,MAKEINTRESOURCE(IDR_PNG1),_T("PNG"));
if(hr==NULL)  
return;
DWORD dwsize=SizeofResource(GetModuleHandle(NULL),hr);
HGLOBAL hg=LoadResource(GetModuleHandle(NULL),hr);
LPSTR lp=(LPSTR)LockResource(hg);




RECT rect;
rect.top = top;
rect.left=left;
IImagingFactory *pImageFactory=NULL;
IImage *pImage;


if(SUCCEEDED(CoInitializeEx(NULL,COINIT_MULTITHREADED)))
{
HRESULT hResult=0;
if(SUCCEEDED(hResult=CoCreateInstance(CLSID_ImagingFactory,NULL,CLSCTX_INPROC_SERVER,IID_IImagingFactory,(void**)&pImageFactory)))
{
hResult=0;
if(SUCCEEDED(pImageFactory->CreateImageFromBuffer(lp,dwsize,DISPOSAL_NONE,&pImage)))
{
ImageInfo imgInf;
pImage->GetImageInfo(&imgInf);
rect.right=rect.left+imgInf.Width;
rect.bottom=rect.top+imgInf.Height;
pImage->Draw(hdc,&rect,NULL);
pImage->Release();
}
else
MessageBox(g_hWnd,_T("载入失败"),_T("error"),MB_OKCANCEL);
pImageFactory->Release();
}
else
MessageBox(g_hWnd,_T("CoCreateInstance fail"),_T("error"),MB_OKCANCEL);
if(hResult==REGDB_E_CLASSNOTREG)
MessageBox(g_hWnd,_T("REGDB_E_CLASSNOTREG"),_T("error"),MB_OKCANCEL);
CoUninitialize();
}
 DeleteObject(hr);
}