437 lines
11 KiB
C
437 lines
11 KiB
C
/*
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* Copyright 1998 Douglas Ridgway
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <windows.h>
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#include <commctrl.h>
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#include <commdlg.h>
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#include <stdio.h>
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#include "resource.h"
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static HINSTANCE hInst;
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static HWND hMainWnd;
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static const WCHAR szAppName[] = L"View";
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static WCHAR szTitle[MAX_PATH];
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static WCHAR szFileTitle[MAX_PATH];
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static HMETAFILE hmf;
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static HENHMETAFILE enhmf;
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static int deltax = 0, deltay = 0;
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static int width = 0, height = 0;
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static BOOL isAldus, isEnhanced;
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#include "pshpack1.h"
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typedef struct
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{
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DWORD key;
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WORD hmf;
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SMALL_RECT bbox;
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WORD inch;
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DWORD reserved;
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WORD checksum;
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} APMFILEHEADER;
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#include "poppack.h"
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#define APMHEADER_KEY 0x9AC6CDD7l
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static BOOL FileOpen(HWND hWnd, WCHAR *fn, int fnsz)
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{
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WCHAR filter[120], metafileFilter[100];
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OPENFILENAMEW ofn = { sizeof(OPENFILENAMEW),
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0, 0, NULL, NULL, 0, 0, NULL,
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fnsz, NULL, 0, NULL, NULL,
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OFN_SHOWHELP, 0, 0, NULL, 0, NULL };
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LoadStringW( hInst, IDS_OPEN_META_STRING, metafileFilter, ARRAY_SIZE(metafileFilter) );
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swprintf( filter, ARRAY_SIZE(filter), L"%s%c*.wmf;*.emf%c", metafileFilter, 0, 0 );
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ofn.lpstrFilter = filter;
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ofn.hwndOwner = hWnd;
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ofn.lpstrFile = fn;
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if( fnsz < 1 )
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return FALSE;
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*fn = 0;
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return GetOpenFileNameW(&ofn);
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}
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static BOOL FileIsEnhanced( LPCWSTR szFileName )
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{
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ENHMETAHEADER enh;
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HANDLE handle;
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DWORD size;
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handle = CreateFileW( szFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 );
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if (handle == INVALID_HANDLE_VALUE)
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return FALSE;
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if (!ReadFile( handle, &enh, sizeof(ENHMETAHEADER), &size, NULL ) || size != sizeof(ENHMETAHEADER) )
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{
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CloseHandle( handle );
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return FALSE;
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}
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CloseHandle( handle );
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/* Is it enhanced? */
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return (enh.dSignature == ENHMETA_SIGNATURE);
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}
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static BOOL FileIsPlaceable( LPCWSTR szFileName )
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{
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APMFILEHEADER apmh;
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HANDLE handle;
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DWORD size;
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handle = CreateFileW( szFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 );
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if (handle == INVALID_HANDLE_VALUE)
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return FALSE;
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if (!ReadFile( handle, &apmh, sizeof(APMFILEHEADER), &size, NULL ) || size != sizeof(APMFILEHEADER))
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{
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CloseHandle( handle );
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return FALSE;
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}
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CloseHandle( handle );
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/* Is it placeable? */
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return (apmh.key == APMHEADER_KEY);
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}
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static HMETAFILE GetPlaceableMetaFile( LPCWSTR szFileName )
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{
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LPBYTE lpData;
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METAHEADER mfHeader;
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APMFILEHEADER APMHeader;
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HANDLE handle;
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DWORD size;
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HMETAFILE hmf;
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WORD checksum, *p;
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HDC hdc;
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int i;
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handle = CreateFileW( szFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 );
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if (handle == INVALID_HANDLE_VALUE)
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return 0;
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if (!ReadFile( handle, &APMHeader, sizeof(APMFILEHEADER), &size, NULL ) || size != sizeof(APMFILEHEADER))
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{
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CloseHandle( handle );
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return 0;
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}
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checksum = 0;
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p = (WORD *) &APMHeader;
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for(i=0; i<10; i++)
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checksum ^= *p++;
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if (checksum != APMHeader.checksum) {
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char msg[128];
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sprintf(msg, "Computed checksum %04x != stored checksum %04x\n",
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checksum, APMHeader.checksum);
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MessageBoxA(hMainWnd, msg, "Checksum failed", MB_OK);
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CloseHandle( handle );
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return 0;
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}
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if (!ReadFile( handle, &mfHeader, sizeof(METAHEADER), &size, NULL) || size != sizeof(METAHEADER))
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{
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CloseHandle( handle );
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return 0;
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}
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if (!(lpData = GlobalAlloc(GPTR, (mfHeader.mtSize * 2L))))
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{
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CloseHandle( handle );
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return 0;
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}
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SetFilePointer( handle, sizeof(APMFILEHEADER), NULL, FILE_BEGIN );
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if (!ReadFile(handle, lpData, mfHeader.mtSize * 2, &size, NULL ) || size != mfHeader.mtSize * 2)
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{
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GlobalFree(lpData);
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CloseHandle( handle );
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return 0;
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}
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CloseHandle( handle );
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if (!(hmf = SetMetaFileBitsEx(mfHeader.mtSize*2, lpData))) {
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GlobalFree(lpData);
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return 0;
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}
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width = APMHeader.bbox.Right - APMHeader.bbox.Left;
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height = APMHeader.bbox.Bottom - APMHeader.bbox.Top;
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/* printf("Ok! width %d height %d inch %d\n", width, height, APMHeader.inch); */
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hdc = GetDC(hMainWnd);
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width = width * GetDeviceCaps(hdc, LOGPIXELSX)/APMHeader.inch;
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height = height * GetDeviceCaps(hdc,LOGPIXELSY)/APMHeader.inch;
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ReleaseDC(hMainWnd, hdc);
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deltax = 0;
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deltay = 0 ;
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GlobalFree(lpData);
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return hmf;
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}
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static void DoOpenFile(LPCWSTR filename)
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{
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if (!filename) return;
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isAldus = FileIsPlaceable(filename);
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if (isAldus) {
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hmf = GetPlaceableMetaFile(filename);
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} else {
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RECT r;
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isEnhanced = FileIsEnhanced(filename);
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if (isEnhanced)
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enhmf = GetEnhMetaFileW(filename);
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else
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hmf = GetMetaFileW(filename);
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GetClientRect(hMainWnd, &r);
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width = r.right - r.left;
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height = r.bottom - r.top;
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}
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InvalidateRect( hMainWnd, NULL, TRUE );
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}
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static void UpdateWindowCaption(void)
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{
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WCHAR szCaption[MAX_PATH];
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WCHAR szView[MAX_PATH];
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LoadStringW(hInst, IDS_DESCRIPTION, szView, ARRAY_SIZE(szView));
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if (szFileTitle[0] != '\0')
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{
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lstrcpyW(szCaption, szFileTitle);
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LoadStringW(hInst, IDS_DESCRIPTION, szView, ARRAY_SIZE(szView));
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lstrcatW(szCaption, L" - ");
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lstrcatW(szCaption, szView);
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}
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else
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lstrcpyW(szCaption, szView);
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SetWindowTextW(hMainWnd, szCaption);
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}
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static LRESULT CALLBACK WndProc(HWND hwnd, UINT uMessage, WPARAM wparam, LPARAM lparam)
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{
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switch (uMessage)
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{
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case WM_PAINT:
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{
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PAINTSTRUCT ps;
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BeginPaint(hwnd, &ps);
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SetMapMode(ps.hdc, MM_ANISOTROPIC);
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/* Set the window extent to a sane value in case the metafile doesn't */
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SetWindowExtEx(ps.hdc, width, height, NULL);
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SetViewportExtEx(ps.hdc, width, height, NULL);
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SetViewportOrgEx(ps.hdc, deltax, deltay, NULL);
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if (isEnhanced && enhmf)
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{
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RECT r;
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GetClientRect(hwnd, &r);
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PlayEnhMetaFile(ps.hdc, enhmf, &r);
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}
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else if (hmf)
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PlayMetaFile(ps.hdc, hmf);
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EndPaint(hwnd, &ps);
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}
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break;
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case WM_COMMAND: /* message: command from application menu */
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switch (LOWORD(wparam))
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{
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case IDM_OPEN:
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{
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WCHAR filename[MAX_PATH];
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if (FileOpen(hwnd, filename, ARRAY_SIZE(filename)))
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{
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szFileTitle[0] = 0;
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GetFileTitleW(filename, szFileTitle, ARRAY_SIZE(szFileTitle));
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DoOpenFile(filename);
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UpdateWindowCaption();
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}
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}
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break;
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case IDM_SET_EXT_TO_WIN:
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{
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RECT r;
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GetClientRect(hwnd, &r);
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width = r.right - r.left;
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height = r.bottom - r.top;
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deltax = deltay = 0;
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InvalidateRect( hwnd, NULL, TRUE );
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}
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break;
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case IDM_LEFT:
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deltax += 100;
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InvalidateRect( hwnd, NULL, TRUE );
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break;
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case IDM_RIGHT:
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deltax -= 100;
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InvalidateRect( hwnd, NULL, TRUE );
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break;
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case IDM_UP:
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deltay += 100;
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InvalidateRect( hwnd, NULL, TRUE );
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break;
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case IDM_DOWN:
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deltay -= 100;
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InvalidateRect( hwnd, NULL, TRUE );
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break;
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case IDM_EXIT:
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DestroyWindow(hwnd);
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break;
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default:
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return DefWindowProcW(hwnd, uMessage, wparam, lparam);
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}
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break;
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case WM_DESTROY: /* message: window being destroyed */
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PostQuitMessage(0);
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break;
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default: /* Passes it on if unprocessed */
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return DefWindowProcW(hwnd, uMessage, wparam, lparam);
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}
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return 0;
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}
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static BOOL InitApplication(HINSTANCE hInstance)
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{
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WNDCLASSEXW wc;
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/* Load the application description strings */
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LoadStringW(hInstance, IDS_DESCRIPTION, szTitle, ARRAY_SIZE(szTitle));
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/* Fill in window class structure with parameters that describe the
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main window */
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wc.cbSize = sizeof(WNDCLASSEXW);
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wc.style = CS_HREDRAW | CS_VREDRAW; /* Class style(s) */
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wc.lpfnWndProc = WndProc; /* Window Procedure */
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wc.cbClsExtra = 0; /* No per-class extra data */
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wc.cbWndExtra = 0; /* No per-window extra data */
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wc.hInstance = hInstance; /* Owner of this class */
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wc.hIcon = NULL;
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wc.hIconSm = NULL;
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wc.hCursor = LoadCursorW(NULL, (LPWSTR)IDC_ARROW);
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wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); /* Default color */
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wc.lpszMenuName = szAppName; /* Menu name from .rc */
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wc.lpszClassName = szAppName; /* Name to register as */
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if (!RegisterClassExW(&wc)) return FALSE;
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/* Call module specific initialization functions here */
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return TRUE;
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}
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static BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
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{
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/* Save the instance handle in a global variable for later use */
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hInst = hInstance;
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/* Create main window */
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hMainWnd = CreateWindowW(szAppName, /* See RegisterClass() call */
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szTitle, /* window title */
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WS_OVERLAPPEDWINDOW, /* Window style */
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CW_USEDEFAULT, 0, /* positioning */
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CW_USEDEFAULT, 0, /* size */
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NULL, /* Overlapped has no parent */
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NULL, /* Use the window class menu */
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hInstance,
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NULL);
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if (!hMainWnd)
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return FALSE;
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/* Call module specific instance initialization functions here */
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/* show the window, and paint it for the first time */
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ShowWindow(hMainWnd, nCmdShow);
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UpdateWindow(hMainWnd);
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return TRUE;
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}
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static void HandleCommandLine(LPWSTR cmdline)
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{
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/* skip white space */
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while (*cmdline == ' ') cmdline++;
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if (*cmdline)
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{
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/* file name is passed on the command line */
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if (cmdline[0] == '"')
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{
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cmdline++;
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cmdline[lstrlenW(cmdline) - 1] = 0;
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}
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szFileTitle[0] = 0;
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GetFileTitleW(cmdline, szFileTitle, ARRAY_SIZE(szFileTitle));
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DoOpenFile(cmdline);
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UpdateWindowCaption();
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}
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}
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int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow)
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{
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MSG msg;
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InitCommonControls();
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/* Other instances of app running? */
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if (!hPrevInstance)
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{
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/* stuff to be done once */
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if (!InitApplication(hInstance))
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{
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return FALSE; /* exit */
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}
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}
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/* stuff to be done every time */
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if (!InitInstance(hInstance, nCmdShow))
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{
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return FALSE;
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}
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HandleCommandLine(lpCmdLine);
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/* Main loop */
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/* Acquire and dispatch messages until a WM_QUIT message is received */
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while (GetMessageW(&msg, NULL, 0, 0))
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{
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TranslateMessage(&msg);
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DispatchMessageW(&msg);
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}
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return msg.wParam;
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}
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