sdl_dibevents.c

SDL库 在进行视频显示程序spcaview安装时必须的库文件

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    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

    Sam Lantinga
    [e-mail]
*/
#include "SDL_config.h"

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#include "SDL_main.h"
#include "SDL_events.h"
#include "SDL_syswm.h"
#include "../../events/SDL_sysevents.h"
#include "../../events/SDL_events_c.h"
#include "../wincommon/SDL_lowvideo.h"
#include "SDL_dibvideo.h"
#include "SDL_vkeys.h"

#ifndef WM_APP
#define WM_APP	0x8000
#endif

#ifdef _WIN32_WCE
#define NO_GETKEYBOARDSTATE
#endif

/* The translation table from a Microsoft VK keysym to a SDL keysym */
static SDLKey VK_keymap[SDLK_LAST];
static SDL_keysym *TranslateKey(WPARAM vkey, UINT scancode, SDL_keysym *keysym, int pressed);

/* Masks for processing the windows KEYDOWN and KEYUP messages */
#define REPEATED_KEYMASK	(1<<30)
#define EXTENDED_KEYMASK	(1<<24)

/* DJM: If the user setup the window for us, we want to save his window proc,
   and give him a chance to handle some messages. */
#ifdef STRICT
#define WNDPROCTYPE	WNDPROC
#else
#define WNDPROCTYPE	FARPROC
#endif
static WNDPROCTYPE userWindowProc = NULL;


#ifdef _WIN32_WCE

WPARAM rotateKey(WPARAM key,SDL_ScreenOrientation direction) 
{
	if (direction != SDL_ORIENTATION_LEFT)
		return key;

	switch (key) {
		case 0x26: /* up */
			return 0x27;
		case 0x27: /* right */
			return 0x28;
		case 0x28: /* down */
			return 0x25;
		case 0x25: /* left */
			return 0x26;
	}

	return key;
}

#endif 


/* The main Win32 event handler */
LRESULT DIB_HandleMessage(_THIS, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	extern int posted;

	switch (msg) {
		case WM_SYSKEYDOWN:
		case WM_KEYDOWN: {
			SDL_keysym keysym;

#ifdef _WIN32_WCE
			// Drop GAPI artefacts
			if (wParam == 0x84 || wParam == 0x5B)
				return 0;

			// Rotate key if necessary
			if (this->hidden->orientation != SDL_ORIENTATION_UP)
				wParam = rotateKey(wParam, this->hidden->orientation);	
#endif 
			/* Ignore repeated keys */
			if ( lParam&REPEATED_KEYMASK ) {
				return(0);
			}
			switch (wParam) {
				case VK_CONTROL:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RCONTROL;
					else
						wParam = VK_LCONTROL;
					break;
				case VK_SHIFT:
					/* EXTENDED trick doesn't work here */
					{
					Uint8 *state = SDL_GetKeyState(NULL);
					if (state[SDLK_LSHIFT] == SDL_RELEASED && (GetKeyState(VK_LSHIFT) & 0x8000)) {
						wParam = VK_LSHIFT;
					} else if (state[SDLK_RSHIFT] == SDL_RELEASED && (GetKeyState(VK_RSHIFT) & 0x8000)) {
						wParam = VK_RSHIFT;
					} else {
						/* Win9x */
						int sc = HIWORD(lParam) & 0xFF;

						if (sc == 0x2A)
							wParam = VK_LSHIFT;
						else
						if (sc == 0x36)
							wParam = VK_RSHIFT;
						else
							wParam = VK_LSHIFT;
					}
					}
					break;
				case VK_MENU:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RMENU;
					else
						wParam = VK_LMENU;
					break;
			}
#ifdef NO_GETKEYBOARDSTATE
			/* this is the workaround for the missing ToAscii() and ToUnicode() in CE (not necessary at KEYUP!) */
			if ( SDL_TranslateUNICODE ) {
				MSG m;

				m.hwnd = hwnd;
				m.message = msg;
				m.wParam = wParam;
				m.lParam = lParam;
				m.time = 0;
				if ( TranslateMessage(&m) && PeekMessage(&m, hwnd, 0, WM_USER, PM_NOREMOVE) && (m.message == WM_CHAR) ) {
					GetMessage(&m, hwnd, 0, WM_USER);
			    		wParam = m.wParam;
				}
			}
#endif /* NO_GETKEYBOARDSTATE */
			posted = SDL_PrivateKeyboard(SDL_PRESSED,
				TranslateKey(wParam,HIWORD(lParam),&keysym,1));
		}
		return(0);

		case WM_SYSKEYUP:
		case WM_KEYUP: {
			SDL_keysym keysym;

#ifdef _WIN32_WCE
			// Drop GAPI artifacts
			if (wParam == 0x84 || wParam == 0x5B)
				return 0;

			// Rotate key if necessary
			if (this->hidden->orientation != SDL_ORIENTATION_UP)
				wParam = rotateKey(wParam, this->hidden->orientation);	
#endif

			switch (wParam) {
				case VK_CONTROL:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RCONTROL;
					else
						wParam = VK_LCONTROL;
					break;
				case VK_SHIFT:
					/* EXTENDED trick doesn't work here */
					{
					Uint8 *state = SDL_GetKeyState(NULL);
					if (state[SDLK_LSHIFT] == SDL_PRESSED && !(GetKeyState(VK_LSHIFT) & 0x8000)) {
						wParam = VK_LSHIFT;
					} else if (state[SDLK_RSHIFT] == SDL_PRESSED && !(GetKeyState(VK_RSHIFT) & 0x8000)) {
						wParam = VK_RSHIFT;
					} else {
						/* Win9x */
						int sc = HIWORD(lParam) & 0xFF;

						if (sc == 0x2A)
							wParam = VK_LSHIFT;
						else
						if (sc == 0x36)
							wParam = VK_RSHIFT;
						else
							wParam = VK_LSHIFT;
					}
					}
					break;
				case VK_MENU:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RMENU;
					else
						wParam = VK_LMENU;
					break;
			}
			/* Windows only reports keyup for print screen */
			if ( wParam == VK_SNAPSHOT && SDL_GetKeyState(NULL)[SDLK_PRINT] == SDL_RELEASED ) {
				posted = SDL_PrivateKeyboard(SDL_PRESSED,
					TranslateKey(wParam,HIWORD(lParam),&keysym,1));
			}
			posted = SDL_PrivateKeyboard(SDL_RELEASED,
				TranslateKey(wParam,HIWORD(lParam),&keysym,0));
		}
		return(0);

#if defined(SC_SCREENSAVE) && defined(SC_MONITORPOWER)
		case WM_SYSCOMMAND: {
			const DWORD val = (DWORD) (wParam & 0xFFF0);
			if ((val == SC_SCREENSAVE) || (val == SC_MONITORPOWER)) {
				if (!this->hidden->allow_screensaver) {
					/* Note that this doesn't stop anything on Vista
					   if the screensaver has a password. */
					return(0);
				}
			}
		}
		/* Fall through to default processing */
#endif /* SC_SCREENSAVE && SC_MONITORPOWER */

		default: {
			/* Only post the event if we're watching for it */
			if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {
			        SDL_SysWMmsg wmmsg;

				SDL_VERSION(&wmmsg.version);
				wmmsg.hwnd = hwnd;
				wmmsg.msg = msg;
				wmmsg.wParam = wParam;
				wmmsg.lParam = lParam;
				posted = SDL_PrivateSysWMEvent(&wmmsg);

			/* DJM: If the user isn't watching for private
				messages in her SDL event loop, then pass it
				along to any win32 specific window proc.
			 */
			} else if (userWindowProc) {
				return CallWindowProc(userWindowProc, hwnd, msg, wParam, lParam);
			}
		}
		break;
	}
	return(DefWindowProc(hwnd, msg, wParam, lParam));
}

void DIB_PumpEvents(_THIS)
{
	MSG msg;

	while ( PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) ) {
		if ( GetMessage(&msg, NULL, 0, 0) > 0 ) {
			DispatchMessage(&msg);
		}
	}
}

static HKL hLayoutUS = NULL;

void DIB_InitOSKeymap(_THIS)
{
	int	i;
#ifndef _WIN32_WCE
	char	current_layout[KL_NAMELENGTH];

	GetKeyboardLayoutName(current_layout);
	//printf("Initial Keyboard Layout Name: '%s'\n", current_layout);

	hLayoutUS = LoadKeyboardLayout("00000409", KLF_NOTELLSHELL);

	if (!hLayoutUS) {
		//printf("Failed to load US keyboard layout. Using current.\n");
		hLayoutUS = GetKeyboardLayout(0);
	}
	LoadKeyboardLayout(current_layout, KLF_ACTIVATE);
#else
#if _WIN32_WCE >=420
	TCHAR	current_layout[KL_NAMELENGTH];