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view src/video/epoc/SDL_epocevents.cpp @ 968:4675910b0b7b

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Date: Mon, 11 Oct 2004 15:17:27 +0300 (EEST) From: Hannu Savolainen Subject: Re: SDL uses obsolete OSS features I did some work on getting OSS to work better with SDL. There have been some problems with select which should be fixed now. I'm having some problems in understanding what is the purpose of the DSP_WaitAudio() routine. I added a return to the very beginning of this routine and commendted out the define for USE_BLOCKING_WRITES. At least lbreakout2 seems to work as well as earlier. The latencies are the same. An ordinary blocking write does exactly the same thing than DSP_WaitAudio does. So I would recommend using the USE_BLOCKING_WRITES approach and removing everything from the DSP_WaitAudio routine. Also enabling USE_BLOCKING_WRITES makes it possible to simplify DSP_PlayAudio() because you don't need to handle the partial writes (the do-while loop). Attached is a patch against SDL-1.2.7. After these changes SDL will use OSS as it's designed to be used (make it as simple as possible). This code should work with all OSS implementations because it uses only the very fundamental features that have been there since the jurassic times.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 12 Nov 2004 21:39:04 +0000
parents f6ffac90895c
children 19418e4422cb
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/*
    SDL_epocevents.cpp
    Handle the event stream, converting Epoc events into SDL events

    Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi)
*/


#include <stdio.h>
#undef NULL

extern "C" {
#include "SDL_error.h"
#include "SDL_video.h"
#include "SDL_keysym.h"
#include "SDL_keyboard.h"
#include "SDL_events_c.h"
#include "SDL_timer.h"
}; /* extern "C" */

#include "SDL_epocvideo.h"
#include "SDL_epocevents_c.h"

#include <hal.h>

extern "C" {
/* The translation tables from a console scancode to a SDL keysym */
static SDLKey keymap[MAX_SCANCODE];
static SDL_keysym *TranslateKey(int scancode, SDL_keysym *keysym);
}; /* extern "C" */

TBool isCursorVisible = ETrue;

int EPOC_HandleWsEvent(_THIS, const TWsEvent& aWsEvent)
{
    int posted = 0;
    SDL_keysym keysym;


    switch (aWsEvent.Type()) {
    
    case EEventPointer: /* Mouse pointer events */
    {
        const TPointerEvent* pointerEvent = aWsEvent.Pointer();
        TPoint mousePos = pointerEvent->iPosition;

        //SDL_TRACE1("SDL: EPOC_HandleWsEvent, pointerEvent->iType=%d", pointerEvent->iType); //!!

        if (Private->EPOC_ShrinkedHeight) {
            mousePos.iY <<= 1; /* Scale y coordinate to shrinked screen height */
        }
		posted += SDL_PrivateMouseMotion(0, 0, mousePos.iX, mousePos.iY); /* Absolute position on screen */
        if (pointerEvent->iType==TPointerEvent::EButton1Down) {
            posted += SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_LEFT, 0, 0);
        }
        else if (pointerEvent->iType==TPointerEvent::EButton1Up) {
			posted += SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_LEFT, 0, 0);
        }
        else if (pointerEvent->iType==TPointerEvent::EButton2Down) {
            posted += SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_RIGHT, 0, 0);
        }
        else if (pointerEvent->iType==TPointerEvent::EButton2Up) {
			posted += SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_RIGHT, 0, 0);
        }
	    //!!posted += SDL_PrivateKeyboard(SDL_PRESSED, TranslateKey(aWsEvent.Key()->iScanCode, &keysym));
        break;
    }
    
    case EEventKeyDown: /* Key events */
    {
       (void*)TranslateKey(aWsEvent.Key()->iScanCode, &keysym);
        
        /* Special handling */
        switch((int)keysym.sym) {
        case SDLK_CAPSLOCK:
            if (!isCursorVisible) {
                /* Enable virtual cursor */
	            HAL::Set(HAL::EMouseState, HAL::EMouseState_Visible);
            }
            else {
                /* Disable virtual cursor */
                HAL::Set(HAL::EMouseState, HAL::EMouseState_Invisible);
            }
            isCursorVisible = !isCursorVisible;
            break;
        }
        
	    posted += SDL_PrivateKeyboard(SDL_PRESSED, &keysym);
        break;
	} 

    case EEventKeyUp: /* Key events */
    {
	    posted += SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(aWsEvent.Key()->iScanCode, &keysym));
        break;
	} 
    
    case EEventFocusGained: /* SDL window got focus */
    {
        //Private->EPOC_IsWindowFocused = ETrue;
        /* Draw window background and screen buffer */
        RedrawWindowL(_this);  
        break;
    }

    case EEventFocusLost: /* SDL window lost focus */
    {
        //Private->EPOC_IsWindowFocused = EFalse;

        // Wait and eat events until focus is gained again
        /*
	    while (ETrue) {
            Private->EPOC_WsSession.EventReady(&Private->EPOC_WsEventStatus);
            User::WaitForRequest(Private->EPOC_WsEventStatus);
		    Private->EPOC_WsSession.GetEvent(Private->EPOC_WsEvent);
            TInt eventType = Private->EPOC_WsEvent.Type();
		    Private->EPOC_WsEventStatus = KRequestPending;
		    //Private->EPOC_WsSession.EventReady(&Private->EPOC_WsEventStatus);
            if (eventType == EEventFocusGained) {
                RedrawWindowL(_this);
                break;
            }
	    }
        */
        break;
    }

    case EEventModifiersChanged: 
    {
	    TModifiersChangedEvent* modEvent = aWsEvent.ModifiersChanged();
        TUint modstate = KMOD_NONE;
        if (modEvent->iModifiers == EModifierLeftShift)
            modstate |= KMOD_LSHIFT;
        if (modEvent->iModifiers == EModifierRightShift)
            modstate |= KMOD_RSHIFT;
        if (modEvent->iModifiers == EModifierLeftCtrl)
            modstate |= KMOD_LCTRL;
        if (modEvent->iModifiers == EModifierRightCtrl)
            modstate |= KMOD_RCTRL;
        if (modEvent->iModifiers == EModifierLeftAlt)
            modstate |= KMOD_LALT;
        if (modEvent->iModifiers == EModifierRightAlt)
            modstate |= KMOD_RALT;
        if (modEvent->iModifiers == EModifierLeftFunc)
            modstate |= KMOD_LMETA;
        if (modEvent->iModifiers == EModifierRightFunc)
            modstate |= KMOD_RMETA;
        if (modEvent->iModifiers == EModifierCapsLock)
            modstate |= KMOD_CAPS;
        SDL_SetModState(STATIC_CAST(SDLMod,(modstate | KMOD_LSHIFT)));
        break;
    }
    default:            
        break;
	} 
	
    return posted;
}

extern "C" {

void EPOC_PumpEvents(_THIS)
{
    int posted = 0; // !! Do we need this?
    //Private->EPOC_WsSession.EventReady(&Private->EPOC_WsEventStatus);
	while (Private->EPOC_WsEventStatus != KRequestPending) {

		Private->EPOC_WsSession.GetEvent(Private->EPOC_WsEvent);
		posted = EPOC_HandleWsEvent(_this, Private->EPOC_WsEvent);
		Private->EPOC_WsEventStatus = KRequestPending;
		Private->EPOC_WsSession.EventReady(&Private->EPOC_WsEventStatus);
	}
}


void EPOC_InitOSKeymap(_THIS)
{
	int i;

	/* Initialize the key translation table */
	for ( i=0; i<SDL_TABLESIZE(keymap); ++i )
		keymap[i] = SDLK_UNKNOWN;


	/* Numbers */
	for ( i = 0; i<32; ++i ){
		keymap[' ' + i] = (SDLKey)(SDLK_SPACE+i);
	}
	/* e.g. Alphabet keys */
	for ( i = 0; i<32; ++i ){
		keymap['A' + i] = (SDLKey)(SDLK_a+i);
	}

	keymap[EStdKeyBackspace]    = SDLK_BACKSPACE;
	keymap[EStdKeyTab]          = SDLK_TAB;
	keymap[EStdKeyEnter]        = SDLK_RETURN;
	keymap[EStdKeyEscape]       = SDLK_ESCAPE;
   	keymap[EStdKeySpace]        = SDLK_SPACE;
   	keymap[EStdKeyPause]        = SDLK_PAUSE;
   	keymap[EStdKeyHome]         = SDLK_HOME;
   	keymap[EStdKeyEnd]          = SDLK_END;
   	keymap[EStdKeyPageUp]       = SDLK_PAGEUP;
   	keymap[EStdKeyPageDown]     = SDLK_PAGEDOWN;
	keymap[EStdKeyDelete]       = SDLK_DELETE;
	keymap[EStdKeyUpArrow]      = SDLK_UP;
	keymap[EStdKeyDownArrow]    = SDLK_DOWN;
	keymap[EStdKeyLeftArrow]    = SDLK_LEFT;
	keymap[EStdKeyRightArrow]   = SDLK_RIGHT;
	keymap[EStdKeyCapsLock]     = SDLK_CAPSLOCK;
	keymap[EStdKeyLeftShift]    = SDLK_LSHIFT;
	keymap[EStdKeyRightShift]   = SDLK_RSHIFT;
	keymap[EStdKeyLeftAlt]      = SDLK_LALT;
	keymap[EStdKeyRightAlt]     = SDLK_RALT;
	keymap[EStdKeyLeftCtrl]     = SDLK_LCTRL;
	keymap[EStdKeyRightCtrl]    = SDLK_RCTRL;
	keymap[EStdKeyLeftFunc]     = SDLK_LMETA;
	keymap[EStdKeyRightFunc]    = SDLK_RMETA;
	keymap[EStdKeyInsert]       = SDLK_INSERT;
	keymap[EStdKeyComma]        = SDLK_COMMA;
	keymap[EStdKeyFullStop]     = SDLK_PERIOD;
	keymap[EStdKeyForwardSlash] = SDLK_SLASH;
	keymap[EStdKeyBackSlash]    = SDLK_BACKSLASH;
	keymap[EStdKeySemiColon]    = SDLK_SEMICOLON;
	keymap[EStdKeySingleQuote]  = SDLK_QUOTE;
	keymap[EStdKeyHash]         = SDLK_HASH;
	keymap[EStdKeySquareBracketLeft]    = SDLK_LEFTBRACKET;
	keymap[EStdKeySquareBracketRight]   = SDLK_RIGHTBRACKET;
	keymap[EStdKeyMinus]        = SDLK_MINUS;
	keymap[EStdKeyEquals]       = SDLK_EQUALS;

   	keymap[EStdKeyF1]          = SDLK_F1;  /* chr + q */
   	keymap[EStdKeyF2]          = SDLK_F2;  /* chr + w */
   	keymap[EStdKeyF3]          = SDLK_F3;  /* chr + e */
   	keymap[EStdKeyF4]          = SDLK_F4;  /* chr + r */
   	keymap[EStdKeyF5]          = SDLK_F5;  /* chr + t */
   	keymap[EStdKeyF6]          = SDLK_F6;  /* chr + y */
   	keymap[EStdKeyF7]          = SDLK_F7;  /* chr + i */
   	keymap[EStdKeyF8]          = SDLK_F8;  /* chr + o */

   	keymap[EStdKeyF9]          = SDLK_F9;  /* chr + a */
   	keymap[EStdKeyF10]         = SDLK_F10; /* chr + s */
   	keymap[EStdKeyF11]         = SDLK_F11; /* chr + d */
   	keymap[EStdKeyF12]         = SDLK_F12; /* chr + f */

    /* !!TODO
	EStdKeyNumLock=0x1b,
	EStdKeyScrollLock=0x1c,

	EStdKeyNkpForwardSlash=0x84,
	EStdKeyNkpAsterisk=0x85,
	EStdKeyNkpMinus=0x86,
	EStdKeyNkpPlus=0x87,
	EStdKeyNkpEnter=0x88,
	EStdKeyNkp1=0x89,
	EStdKeyNkp2=0x8a,
	EStdKeyNkp3=0x8b,
	EStdKeyNkp4=0x8c,
	EStdKeyNkp5=0x8d,
	EStdKeyNkp6=0x8e,
	EStdKeyNkp7=0x8f,
	EStdKeyNkp8=0x90,
	EStdKeyNkp9=0x91,
	EStdKeyNkp0=0x92,
	EStdKeyNkpFullStop=0x93,
    EStdKeyMenu=0x94,
    EStdKeyBacklightOn=0x95,
    EStdKeyBacklightOff=0x96,
    EStdKeyBacklightToggle=0x97,
    EStdKeyIncContrast=0x98,
    EStdKeyDecContrast=0x99,
    EStdKeySliderDown=0x9a,
    EStdKeySliderUp=0x9b,
    EStdKeyDictaphonePlay=0x9c,
    EStdKeyDictaphoneStop=0x9d,
    EStdKeyDictaphoneRecord=0x9e,
    EStdKeyHelp=0x9f,
    EStdKeyOff=0xa0,
    EStdKeyDial=0xa1,
    EStdKeyIncVolume=0xa2,
    EStdKeyDecVolume=0xa3,
    EStdKeyDevice0=0xa4,
    EStdKeyDevice1=0xa5,
    EStdKeyDevice2=0xa6,
    EStdKeyDevice3=0xa7,
    EStdKeyDevice4=0xa8,
    EStdKeyDevice5=0xa9,
    EStdKeyDevice6=0xaa,
    EStdKeyDevice7=0xab,
    EStdKeyDevice8=0xac,
    EStdKeyDevice9=0xad,
    EStdKeyDeviceA=0xae,
    EStdKeyDeviceB=0xaf,
    EStdKeyDeviceC=0xb0,
    EStdKeyDeviceD=0xb1,
    EStdKeyDeviceE=0xb2,
    EStdKeyDeviceF=0xb3,
    EStdKeyApplication0=0xb4,
    EStdKeyApplication1=0xb5,
    EStdKeyApplication2=0xb6,
    EStdKeyApplication3=0xb7,
    EStdKeyApplication4=0xb8,
    EStdKeyApplication5=0xb9,
    EStdKeyApplication6=0xba,
    EStdKeyApplication7=0xbb,
    EStdKeyApplication8=0xbc,
    EStdKeyApplication9=0xbd,
    EStdKeyApplicationA=0xbe,
    EStdKeyApplicationB=0xbf,
    EStdKeyApplicationC=0xc0,
    EStdKeyApplicationD=0xc1,
    EStdKeyApplicationE=0xc2,
    EStdKeyApplicationF=0xc3,
    EStdKeyYes=0xc4,
    EStdKeyNo=0xc5,
    EStdKeyIncBrightness=0xc6,
    EStdKeyDecBrightness=0xc7, 
    EStdKeyCaseOpen=0xc8,
    EStdKeyCaseClose=0xc9
    */

}



static SDL_keysym *TranslateKey(int scancode, SDL_keysym *keysym)
{
    char debug[256];
    //SDL_TRACE1("SDL: TranslateKey, scancode=%d", scancode); //!!

	/* Set the keysym information */ 

	keysym->scancode = scancode;

    if ((scancode >= MAX_SCANCODE) && 
        ((scancode - ENonCharacterKeyBase + 0x0081) >= MAX_SCANCODE)) {
        SDL_SetError("Too big scancode");
        keysym->scancode = SDLK_UNKNOWN;
	    keysym->mod = KMOD_NONE; 
        return keysym;
    }

	keysym->mod = SDL_GetModState(); //!!Is this right??

    /* Handle function keys: F1, F2, F3 ... */
    if (keysym->mod & KMOD_META) {
        if (scancode >= 'A' && scancode < ('A' + 24)) { /* first 32 alphapet keys */
            switch(scancode) {
                case 'Q': scancode = EStdKeyF1; break;
                case 'W': scancode = EStdKeyF2; break;
                case 'E': scancode = EStdKeyF3; break;
                case 'R': scancode = EStdKeyF4; break;
                case 'T': scancode = EStdKeyF5; break;
                case 'Y': scancode = EStdKeyF6; break;
                case 'U': scancode = EStdKeyF7; break;
                case 'I': scancode = EStdKeyF8; break;
                case 'A': scancode = EStdKeyF9; break;
                case 'S': scancode = EStdKeyF10; break;
                case 'D': scancode = EStdKeyF11; break;
                case 'F': scancode = EStdKeyF12; break;
            }
            keysym->sym = keymap[scancode];
        }
    }

    if (scancode >= ENonCharacterKeyBase) {
        // Non character keys
	    keysym->sym = keymap[scancode - 
            ENonCharacterKeyBase + 0x0081]; // !!hard coded
    } else {
	    keysym->sym = keymap[scancode];
    }


	/* If UNICODE is on, get the UNICODE value for the key */
	keysym->unicode = 0;

#if 0 // !!TODO:unicode

	if ( SDL_TranslateUNICODE ) 
    {
		/* Populate the unicode field with the ASCII value */
		keysym->unicode = scancode;
	}
#endif

    //!!
    //sprintf(debug, "SDL: TranslateKey: keysym->scancode=%d, keysym->sym=%d, keysym->mod=%d",
    //    keysym->scancode, keysym->sym, keysym->mod);
    //SDL_TRACE(debug); //!!

	return(keysym);
}

}; /* extern "C" */