EMF查看器 支持半透明 GDI+ 半透明文字

/*---------------------------------------- EMFVIEW.C -- View Enhanced Metafiles (c) Charles Petzold, 1998 ----------------------------------------*/ #include <windows.h> #include <commdlg.h> #include "resource.h" LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; TCHAR szAppName[] = TEXT ("EmfView") ; HBRUSH hBrushBack ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { HBITMAP hBitmap; HACCEL hAccel ; HWND hwnd ; MSG msg ; WNDCLASS wndclass ; hBitmap = LoadBitmap(hInstance,TEXT("교쒼")); if(NULL == hBitmap) { MessageBox (NULL, TEXT ("LoadBitmap Failed !\n") TEXT ("(c) Charles Petzold, 2011"), szAppName, MB_OK) ; return -1; } hBrushBack = CreatePatternBrush(hBitmap); DeleteObject(hBitmap); wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = LoadIcon (hInstance, TEXT("ICON")) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndclass.hbrBackground = hBrushBack ; wndclass.lpszMenuName = szAppName ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindowEx (WS_EX_ACCEPTFILES, szAppName, TEXT ("Enhanced Metafile Viewer"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 500, 400, NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; hAccel = LoadAccelerators (hInstance, szAppName) ; while (GetMessage (&msg, NULL, 0, 0)) { if (!TranslateAccelerator (hwnd, hAccel, &msg)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } } DeleteObject(hBrushBack); return msg.wParam ; } HPALETTE CreatePaletteFromMetaFile (HENHMETAFILE hemf) { HPALETTE hPalette ; int iNum ; LOGPALETTE * plp ; if (!hemf) return NULL ; if (0 == (iNum = GetEnhMetaFilePaletteEntries (hemf, 0, NULL))) return NULL ; plp = malloc (sizeof (LOGPALETTE) + (iNum - 1) * sizeof (PALETTEENTRY)) ; plp->palVersion = 0x0300 ; plp->palNumEntries = iNum ; GetEnhMetaFilePaletteEntries (hemf, iNum, plp->palPalEntry) ; hPalette = CreatePalette (plp) ; free (plp) ; return hPalette ; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { static DOCINFO di = { sizeof (DOCINFO), TEXT ("EmfView: Printing") } ; static HENHMETAFILE hemf ; static OPENFILENAME ofn ; static PRINTDLG printdlg = { sizeof (PRINTDLG) } ; static TCHAR szFileName [MAX_PATH], szTitleName [MAX_PATH] ; static TCHAR szFilter[] = TEXT ("Enhanced Metafiles (*.EMF)\0*.emf\0") TEXT ("All Files (*.*)\0*.*\0\0") ; static HBITMAP hBitmapBack ; static HDC hdcMem ; static HPALETTE hPalette, hPaletteOld ; BOOL bSuccess ; ENHMETAHEADER header ; HDC hdc, hdcPrn ; HENHMETAFILE hemfCopy ; HMENU hMenu ; int i, iLength, iEnable ; PAINTSTRUCT ps ; RECT rect ; PTSTR pBuffer ; switch (message) { case WM_CREATE: // Initialize OPENFILENAME structure ofn.lStructSize = sizeof (OPENFILENAME) ; ofn.hwndOwner = hwnd ; ofn.hInstance = NULL ; ofn.lpstrFilter = szFilter ; ofn.lpstrCustomFilter = NULL ; ofn.nMaxCustFilter = 0 ; ofn.nFilterIndex = 0 ; ofn.lpstrFile = szFileName ; ofn.nMaxFile = MAX_PATH ; ofn.lpstrFileTitle = szTitleName ; ofn.nMaxFileTitle = MAX_PATH ; ofn.lpstrInitialDir = NULL ; ofn.lpstrTitle = NULL ; ofn.Flags = 0 ; ofn.nFileOffset = 0 ; ofn.nFileExtension = 0 ; ofn.lpstrDefExt = TEXT ("emf") ; ofn.lCustData = 0 ; ofn.lpfnHook = NULL ; ofn.lpTemplateName = NULL ; hdc = GetDC(hwnd); hdcMem = CreateCompatibleDC(hdc); hBitmapBack = CreateCompatibleBitmap(hdc,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN)); SelectObject(hdcMem,hBitmapBack); ReleaseDC(hwnd,hdc); GetClientRect (hwnd, &rect) ; FillRect(hdcMem,&rect,hBrushBack); return 0 ; case WM_DISPLAYCHANGE: DeleteDC(hdcMem); DeleteObject(hBitmapBack); hdc = GetDC(hwnd); hdcMem = CreateCompatibleDC(hdc); hBitmapBack = CreateCompatibleBitmap(hdc,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN)); SelectObject(hdcMem,hBitmapBack); ReleaseDC(hwnd,hdc); if (hPalette) { hPaletteOld = SelectPalette (hdcMem, hPalette, FALSE) ; RealizePalette (hdcMem) ; } GetClientRect (hwnd, &rect) ; FillRect(hdcMem,&rect,hBrushBack); PlayEnhMetaFile (hdcMem, hemf, &rect) ; return 0; case WM_SIZE: GetClientRect (hwnd, &rect) ; FillRect(hdcMem,&rect,hBrushBack); if(hemf) PlayEnhMetaFile (hdcMem, hemf, &rect) ; return 0; case WM_ERASEBKGND: return 1; case WM_INITMENUPOPUP: hMenu = GetMenu (hwnd) ; iEnable = hemf ? MF_ENABLED : MF_GRAYED ; EnableMenuItem (hMenu, IDM_FILE_SAVE_AS, iEnable) ; EnableMenuItem (hMenu, IDM_FILE_PRINT, iEnable) ; EnableMenuItem (hMenu, IDM_FILE_PROPERTIES, iEnable) ; EnableMenuItem (hMenu, IDM_EDIT_CUT, iEnable) ; EnableMenuItem (hMenu, IDM_EDIT_COPY, iEnable) ; EnableMenuItem (hMenu, IDM_EDIT_DELETE, iEnable) ; EnableMenuItem (hMenu, IDM_EDIT_PASTE, IsClipboardFormatAvailable (CF_ENHMETAFILE) ? MF_ENABLED : MF_GRAYED) ; return 0 ; case WM_DROPFILES: DragQueryFile((HDROP)wParam,0,szFileName,MAX_PATH); DragFinish((HDROP)wParam); if (hemf) { DeleteEnhMetaFile (hemf) ; hemf = NULL ; if(hPalette) { SelectPalette (hdcMem, hPaletteOld, FALSE) ; RealizePalette (hdcMem) ; DeleteObject(hPalette); hPalette = NULL; } } SetCursor (LoadCursor (NULL, IDC_WAIT)) ; ShowCursor (TRUE) ; hemf = GetEnhMetaFile (szFileName) ; ShowCursor (FALSE) ; SetCursor (LoadCursor (NULL, IDC_ARROW)) ; // Invalidate the client area for later update InvalidateRect (hwnd, NULL, TRUE) ; if (hemf == NULL) { GetClientRect (hwnd, &rect) ; FillRect(hdcMem,&rect,hBrushBack); MessageBox (hwnd, TEXT ("Cannot load metafile"), szAppName, MB_ICONEXCLAMATION | MB_OK) ; } else { if (hPalette = CreatePaletteFromMetaFile (hemf)) { hPaletteOld = SelectPalette (hdcMem, hPalette, FALSE) ; RealizePalette (hdcMem) ; } GetClientRect (hwnd, &rect) ; FillRect(hdcMem,&rect,hBrushBack); PlayEnhMetaFile (hdcMem, hemf, &rect) ; } return 0; case WM_COMMAND: switch (LOWORD (wParam)) { case IDM_FILE_OPEN: // Show the File Open dialog box ofn.Flags = 0 ; if (!GetOpenFileName (&ofn)) return 0 ; // If there's an existing EMF, get rid of it. if (hemf) { DeleteEnhMetaFile (hemf) ; hemf = NULL ; if(hPalette) { SelectPalette (hdcMem, hPaletteOld, FALSE) ; RealizePalette (hdcMem) ; DeleteObject(hPalette); hPalette = NULL; } } // Load the EMF into memory SetCursor (LoadCursor (NULL, IDC_WAIT)) ; ShowCursor (TRUE) ; hemf = GetEnhMetaFile (szFileName) ; ShowCursor (FALSE) ; SetCursor (LoadCursor (NULL, IDC_ARROW)) ; // Invalidate the client area for later update InvalidateRect (hwnd, NULL, TRUE) ; if (hemf == NULL) { GetClientRect (hwnd, &rect) ; FillRect(hdcMem,&rect,hBrushBack); MessageBox (hwnd, TEXT ("Cannot load metafile"), szAppName, MB_ICONEXCLAMATION