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CD-ROM User 1995 January
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CDuser6Jan95.iso
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WING
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HALFTONE.C_
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HALFTONE.C
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Text File
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1994-06-19
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21KB
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576 lines
/*
* HALFTONE.C
*
* (C) Copyright Microsoft Corp. 1994. All rights reserved.
*
* You have a royalty-free right to use, modify, reproduce and
* distribute the Sample Files (and/or any modified version) in
* any way you find useful, provided that you agree that
* Microsoft has no warranty obligations or liability for any
* Sample Application Files which are modified.
*/
#include <windows.h>
#include <windowsx.h>
#include <commdlg.h>
#include <wing.h>
#include "halftone.h"
#include "dib.h"
/*----------------------------------------------------------------------------*\
| |
| g l o b a l v a r i a b l e s |
| |
\*----------------------------------------------------------------------------*/
static char szAppName[]="WinG Halftoning Sample";
static char szAppFilter[]="Bitmaps\0*.bmp;*.dib\0";
static HINSTANCE hInstApp;
static HWND hwndApp;
static HPALETTE hpalApp;
static BOOL fAppActive;
static BOOL fCustomDither = TRUE;
static PDIB pdibOriginal = 0;
static PDIB pdibHalftone = 0;
#ifdef WIN32
#define _export
#endif
/*----------------------------------------------------------------------------*\
| |
| f u n c t i o n d e f i n i t i o n s |
| |
\*----------------------------------------------------------------------------*/
LONG FAR PASCAL _export AppWndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam);
LONG AppCommand (HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam);
void AppExit(void);
BOOL AppIdle(void);
void AppOpenFile(HWND hwnd, LPSTR szFileName);
PDIB DibHalftoneDIB( PDIB pSource );
/*----------------------------------------------------------------------------*\
| AppAbout( hDlg, uiMessage, wParam, lParam ) |
| |
| Description: |
| This function handles messages belonging to the "About" dialog box. |
| The only message that it looks for is WM_COMMAND, indicating the use |
| has pressed the "OK" button. When this happens, it takes down |
| the dialog box. |
| |
| Arguments: |
| hDlg window handle of about dialog window |
| uiMessage message number |
| wParam message-dependent |
| lParam message-dependent |
| |
| Returns: |
| TRUE if message has been processed, else FALSE |
| |
\*----------------------------------------------------------------------------*/
BOOL FAR PASCAL _export AppAbout(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
switch (msg)
{
case WM_COMMAND:
if (LOWORD(wParam) == IDOK)
{
EndDialog(hwnd,TRUE);
}
break;
case WM_INITDIALOG:
return TRUE;
}
return FALSE;
}
/*----------------------------------------------------------------------------*\
| AppInit( hInst, hPrev) |
| |
| Description: |
| This is called when the application is first loaded into |
| memory. It performs all initialization that doesn't need to be done |
| once per instance. |
| |
| Arguments: |
| hInstance instance handle of current instance |
| hPrev instance handle of previous instance |
| |
| Returns: |
| TRUE if successful, FALSE if not |
| |
\*----------------------------------------------------------------------------*/
BOOL AppInit(HINSTANCE hInst,HINSTANCE hPrev,int sw,LPSTR szCmdLine)
{
WNDCLASS cls;
int dx,dy;
HMENU hMenu;
/* Save instance handle for DialogBoxs */
hInstApp = hInst;
if (!hPrev)
{
/*
* Register a class for the main application window
*/
cls.hCursor = LoadCursor(NULL,IDC_ARROW);
cls.hIcon = LoadIcon(hInst,"AppIcon");
cls.lpszMenuName = "AppMenu";
cls.lpszClassName = szAppName;
cls.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
cls.hInstance = hInst;
cls.style = CS_BYTEALIGNCLIENT | CS_VREDRAW | CS_HREDRAW | CS_DBLCLKS;
cls.lpfnWndProc = (WNDPROC)AppWndProc;
cls.cbWndExtra = 0;
cls.cbClsExtra = 0;
if (!RegisterClass(&cls))
return FALSE;
}
dx = GetSystemMetrics (SM_CXSCREEN) / 2;
dy = GetSystemMetrics (SM_CYSCREEN) / 2;
hpalApp = WinGCreateHalftonePalette();
hwndApp = CreateWindow (szAppName, // Class name
szAppName, // Caption
WS_OVERLAPPEDWINDOW, // Style bits
CW_USEDEFAULT, 0, // Position
dx,dy, // Size
(HWND)NULL, // Parent window (no parent)
(HMENU)NULL, // use class menu
hInst, // handle to window instance
(LPSTR)NULL // no params to pass on
);
ShowWindow(hwndApp,sw);
//*** Check the default dither selection
hMenu = GetMenu(hwndApp);
CheckMenuItem(hMenu, MENU_WING, fCustomDither ? MF_CHECKED : MF_UNCHECKED);
CheckMenuItem(hMenu, MENU_GDI, fCustomDither ? MF_UNCHECKED : MF_CHECKED);
if (*szCmdLine)
AppOpenFile(hwndApp, szCmdLine);
return TRUE;
}
/*----------------------------------------------------------------------------*\
| AppExit() |
| |
| Description: |
| app is just about to exit, cleanup |
| |
\*----------------------------------------------------------------------------*/
void AppExit()
{
if (hpalApp)
DeleteObject(hpalApp);
if (pdibOriginal)
DibFree(pdibOriginal);
if (pdibHalftone)
DibFree(pdibHalftone);
}
/*----------------------------------------------------------------------------*\
| WinMain( hInst, hPrev, lpszCmdLine, cmdShow ) |
| |
| Description: