Sweden-Number/programs/view/view.c

406 lines
10 KiB
C

/*
* Copyright 1998 Douglas Ridgway
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <windows.h>
#include <windowsx.h>
#include "resource.h"
#include <stdio.h>
static HINSTANCE hInst;
static HWND hMainWnd;
static char szAppName[5] = "View";
static char szTitle[80];
static HMETAFILE hmf;
static HENHMETAFILE enhmf;
static int deltax = 0, deltay = 0;
static int width = 0, height = 0;
static BOOL isAldus, isEnhanced;
#include "pshpack1.h"
typedef struct
{
DWORD key;
WORD hmf;
SMALL_RECT bbox;
WORD inch;
DWORD reserved;
WORD checksum;
} APMFILEHEADER;
#include "poppack.h"
#define APMHEADER_KEY 0x9AC6CDD7l
static BOOL FileOpen(HWND hWnd, char *fn, int fnsz)
{
OPENFILENAME ofn = { sizeof(OPENFILENAME),
0, 0, NULL, NULL, 0, 0, NULL,
fnsz, NULL, 0, NULL, NULL,
OFN_SHOWHELP, 0, 0, NULL, 0, NULL };
ofn.lpstrFilter = "Metafiles\0*.wmf;*.emf\0";
ofn.hwndOwner = hWnd;
ofn.lpstrFile = fn;
if( fnsz < 1 )
return FALSE;
*fn = 0;
return GetOpenFileName(&ofn);
}
static BOOL FileIsEnhanced( LPCSTR szFileName )
{
HFILE hInFile;
ENHMETAHEADER enh;
if( (hInFile = _lopen( szFileName, OF_READ ) ) == HFILE_ERROR )
return FALSE;
if( _lread( hInFile, &enh, sizeof(ENHMETAHEADER) ) != sizeof(ENHMETAHEADER) )
{
_lclose( hInFile );
return FALSE;
}
_lclose( hInFile );
/* Is it enhanced? */
return (enh.dSignature == ENHMETA_SIGNATURE);
}
static BOOL FileIsPlaceable( LPCSTR szFileName )
{
HFILE hInFile;
APMFILEHEADER apmh;
if( (hInFile = _lopen( szFileName, OF_READ ) ) == HFILE_ERROR )
return FALSE;
if( _lread( hInFile, &apmh, sizeof(APMFILEHEADER) )
!= sizeof(APMFILEHEADER) )
{
_lclose( hInFile );
return FALSE;
}
_lclose( hInFile );
/* Is it placeable? */
return (apmh.key == APMHEADER_KEY);
}
static HMETAFILE GetPlaceableMetaFile( LPCSTR szFileName )
{
LPBYTE lpData;
METAHEADER mfHeader;
APMFILEHEADER APMHeader;
HFILE fh;
HMETAFILE hmf;
WORD checksum, *p;
HDC hdc;
int i;
if( (fh = _lopen( szFileName, OF_READ ) ) == HFILE_ERROR ) return 0;
_llseek(fh, 0, 0);
if (!_lread(fh, &APMHeader, sizeof(APMFILEHEADER))) return 0;
_llseek(fh, sizeof(APMFILEHEADER), 0);
checksum = 0;
p = (WORD *) &APMHeader;
for(i=0; i<10; i++)
checksum ^= *p++;
if (checksum != APMHeader.checksum) {
char msg[128];
sprintf(msg, "Computed checksum %04x != stored checksum %04x\n",
checksum, APMHeader.checksum);
MessageBox(hMainWnd, msg, "Checksum failed", MB_OK);
return 0;
}
if (!_lread(fh, &mfHeader, sizeof(METAHEADER))) return 0;
if (!(lpData = GlobalAlloc(GPTR, (mfHeader.mtSize * 2L)))) return 0;
_llseek(fh, sizeof(APMFILEHEADER), 0);
if (!_lread(fh, lpData, (UINT)(mfHeader.mtSize * 2L)))
{
GlobalFree(lpData);
_lclose(fh);
return 0;
}
_lclose(fh);
if (!(hmf = SetMetaFileBitsEx(mfHeader.mtSize*2, lpData)))
return 0;
width = APMHeader.bbox.Right - APMHeader.bbox.Left;
height = APMHeader.bbox.Bottom - APMHeader.bbox.Top;
/* printf("Ok! width %d height %d inch %d\n", width, height, APMHeader.inch); */
hdc = GetDC(hMainWnd);
width = width * GetDeviceCaps(hdc, LOGPIXELSX)/APMHeader.inch;
height = height * GetDeviceCaps(hdc,LOGPIXELSY)/APMHeader.inch;
ReleaseDC(hMainWnd, hdc);
deltax = 0;
deltay = 0 ;
return hmf;
}
static void DoOpenFile(LPCSTR filename)
{
if (!filename) return;
isAldus = FileIsPlaceable(filename);
if (isAldus) {
hmf = GetPlaceableMetaFile(filename);
} else {
RECT r;
isEnhanced = FileIsEnhanced(filename);
if (isEnhanced)
enhmf = GetEnhMetaFile(filename);
else
hmf = GetMetaFile(filename);
GetClientRect(hMainWnd, &r);
width = r.right - r.left;
height = r.bottom - r.top;
}
InvalidateRect( hMainWnd, NULL, TRUE );
}
static LRESULT CALLBACK WndProc(HWND hwnd, UINT uMessage, WPARAM wparam, LPARAM lparam)
{
switch (uMessage)
{
case WM_PAINT:
{
PAINTSTRUCT ps;
BeginPaint(hwnd, &ps);
SetMapMode(ps.hdc, MM_ANISOTROPIC);
/* Set the window extent to a sane value in case the metafile doesn't */
SetWindowExtEx(ps.hdc, width, height, NULL);
SetViewportExtEx(ps.hdc, width, height, NULL);
SetViewportOrgEx(ps.hdc, deltax, deltay, NULL);
if (isEnhanced && enhmf)
{
RECT r;
GetClientRect(hwnd, &r);
PlayEnhMetaFile(ps.hdc, enhmf, &r);
}
else if (hmf)
PlayMetaFile(ps.hdc, hmf);
EndPaint(hwnd, &ps);
}
break;
case WM_COMMAND: /* message: command from application menu */
switch (GET_WM_COMMAND_ID(wparam,lparam))
{
case IDM_OPEN:
{
char filename[MAX_PATH];
if (FileOpen(hwnd, filename, sizeof(filename)))
DoOpenFile(filename);
}
break;
case IDM_SET_EXT_TO_WIN:
{
RECT r;
GetClientRect(hwnd, &r);
width = r.right - r.left;
height = r.bottom - r.top;
deltax = deltay = 0;
InvalidateRect( hwnd, NULL, TRUE );
}
break;
case IDM_LEFT:
deltax += 100;
InvalidateRect( hwnd, NULL, TRUE );
break;
case IDM_RIGHT:
deltax -= 100;
InvalidateRect( hwnd, NULL, TRUE );
break;
case IDM_UP:
deltay += 100;
InvalidateRect( hwnd, NULL, TRUE );
break;
case IDM_DOWN:
deltay -= 100;
InvalidateRect( hwnd, NULL, TRUE );
break;
case IDM_EXIT:
DestroyWindow(hwnd);
break;
default:
return DefWindowProc(hwnd, uMessage, wparam, lparam);
}
break;
case WM_DESTROY: /* message: window being destroyed */
PostQuitMessage(0);
break;
default: /* Passes it on if unprocessed */
return DefWindowProc(hwnd, uMessage, wparam, lparam);
}
return 0;
}
static BOOL InitApplication(HINSTANCE hInstance)
{
WNDCLASSEX wc;
/* Load the application description strings */
LoadString(hInstance, IDS_DESCRIPTION, szTitle, sizeof(szTitle));
/* Fill in window class structure with parameters that describe the
main window */
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW; /* Class style(s) */
wc.lpfnWndProc = WndProc; /* Window Procedure */
wc.cbClsExtra = 0; /* No per-class extra data */
wc.cbWndExtra = 0; /* No per-window extra data */
wc.hInstance = hInstance; /* Owner of this class */
wc.hIcon = NULL;
wc.hIconSm = NULL;
wc.hCursor = LoadCursor(NULL, IDC_ARROW); /* Cursor */
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); /* Default color */
wc.lpszMenuName = szAppName; /* Menu name from .rc */
wc.lpszClassName = szAppName; /* Name to register as */
/* Register the window class and return FALSE if unsuccessful */
if (!RegisterClassEx(&wc))
{
if (!RegisterClass((LPWNDCLASS)&wc.style))
return FALSE;
}
/* Call module specific initialization functions here */
return TRUE;
}
static BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
/* Save the instance handle in a global variable for later use */
hInst = hInstance;
/* Create main window */
hMainWnd = CreateWindow(szAppName, /* See RegisterClass() call */
szTitle, /* window title */
WS_OVERLAPPEDWINDOW, /* Window style */
CW_USEDEFAULT, 0, /* positioning */
CW_USEDEFAULT, 0, /* size */
NULL, /* Overlapped has no parent */
NULL, /* Use the window class menu */
hInstance,
NULL);
if (!hMainWnd)
return FALSE;
/* Call module specific instance initialization functions here */
/* show the window, and paint it for the first time */
ShowWindow(hMainWnd, nCmdShow);
UpdateWindow(hMainWnd);
return TRUE;
}
static void HandleCommandLine(LPSTR cmdline)
{
CHAR delimiter;
/* skip white space */
while (*cmdline == ' ') cmdline++;
/* skip executable name */
delimiter = (*cmdline == '"' ? '"' : ' ');
if (*cmdline == delimiter) cmdline++;
while (*cmdline && *cmdline != delimiter) cmdline++;
if (*cmdline == delimiter) cmdline++;
if (*cmdline)
{
/* file name is passed on the command line */
if (cmdline[0] == '"')
{
cmdline++;
cmdline[lstrlen(cmdline) - 1] = 0;
}
DoOpenFile(cmdline);
}
}
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
MSG msg;
HANDLE hAccelTable;
/* Other instances of app running? */
if (!hPrevInstance)
{
/* stuff to be done once */
if (!InitApplication(hInstance))
{
return FALSE; /* exit */
}
}
/* stuff to be done every time */
if (!InitInstance(hInstance, nCmdShow))
{
return FALSE;
}
HandleCommandLine(GetCommandLine());
hAccelTable = LoadAccelerators(hInstance, szAppName);
/* Main loop */
/* Acquire and dispatch messages until a WM_QUIT message is received */
while (GetMessage(&msg, NULL, 0, 0))
{
/* Add other Translation functions (for modeless dialogs
and/or MDI windows) here. */
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
/* Add module specific instance free/delete functions here */
/* Returns the value from PostQuitMessage */
return msg.wParam;
}