sdl_ph_events.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"

/* Handle the event stream, converting photon events into SDL events */

#include <stdio.h>
#include <setjmp.h>
#include <sys/time.h>

#include <Ph.h>
#include <photon/PkKeyDef.h>

#include "SDL.h"
#include "SDL_syswm.h"
#include "../SDL_sysvideo.h"
#include "../../events/SDL_sysevents.h"
#include "../../events/SDL_events_c.h"
#include "SDL_ph_video.h"
#include "SDL_ph_modes_c.h"
#include "SDL_ph_image_c.h"
#include "SDL_ph_events_c.h"
#include "SDL_phyuv_c.h"

/* The translation tables from a photon keysym to a SDL keysym */
static SDLKey ODD_keymap[256];
static SDLKey MISC_keymap[0xFF + 1];
SDL_keysym *ph_TranslateKey(PhKeyEvent_t *key, SDL_keysym *keysym);

/* Check to see if this is a repeated key.
   (idea shamelessly lifted from GII -- thanks guys! :) */
static int ph_WarpedMotion(_THIS, PhEvent_t *winEvent)
{
    PhRect_t *rect = PhGetRects( winEvent );

    int centre_x, centre_y;
    int dx, dy;
    short abs_x, abs_y;
    int posted;

    centre_x = SDL_VideoSurface->w / 2;
    centre_y = SDL_VideoSurface->h / 2;

    dx = rect->ul.x - centre_x;
    dy = rect->ul.y - centre_y;

    posted = SDL_PrivateMouseMotion( 0, 1, dx, dy );

    /* Move mouse cursor to middle of the window */
    PtGetAbsPosition( window, &abs_x, &abs_y );
    PhMoveCursorAbs(PhInputGroup(NULL), abs_x + centre_x, abs_y + centre_y);

    return (posted);
}

/* Control which motion flags the window has set, a flags value of -1 sets
 * MOTION_BUTTON and MOTION_NOBUTTON */

static void set_motion_sensitivity(_THIS, unsigned int flags)
{
    int rid;
    int fields = Ph_EV_PTR_MOTION_BUTTON | Ph_EV_PTR_MOTION_NOBUTTON;
    PhRegion_t region;

    if( window )
    {
        rid = PtWidgetRid(window);
        if( rid != 0 && PhRegionQuery(rid, &region, NULL, NULL, 0) == 0 )
        {
            region.events_sense=(region.events_sense & ~fields)|(flags & fields);
            PhRegionChange(Ph_REGION_EV_SENSE, 0, &region, NULL, NULL);
        }
    }
}

/* Convert the photon button state value to an SDL value */
static Uint8 ph2sdl_mousebutton(unsigned short button_state)
{
    Uint8 mouse_button = 0;

    if (button_state & Ph_BUTTON_SELECT)
        mouse_button |= SDL_BUTTON_LEFT;
    if (button_state & Ph_BUTTON_MENU)
        mouse_button |= SDL_BUTTON_RIGHT;
    if (button_state & Ph_BUTTON_ADJUST)
        mouse_button |= SDL_BUTTON_MIDDLE;

    return (mouse_button);
}

static int ph_DispatchEvent(_THIS)
{
    int posted;
    PhRect_t* rect;
    PhPointerEvent_t* pointerEvent;
    PhKeyEvent_t* keyEvent;
    PhWindowEvent_t* winEvent;
    int i, buttons;
    SDL_Rect sdlrects[PH_SDL_MAX_RECTS];
	
    posted = 0;
	
    switch (phevent->type)
    {
        case Ph_EV_BOUNDARY:
        {
            if (phevent->subtype == Ph_EV_PTR_ENTER)
            {
                posted = SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
            }
            else if (phevent->subtype ==Ph_EV_PTR_LEAVE)
            {
                posted = SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);	
            }
        }
        break;

        case Ph_EV_PTR_MOTION_BUTTON:
        case Ph_EV_PTR_MOTION_NOBUTTON:
        {
            if (SDL_VideoSurface)
            {
                pointerEvent = PhGetData(phevent);
                rect = PhGetRects(phevent);

                if (mouse_relative)
                {
                    posted = ph_WarpedMotion(this, phevent);
                }
                else
                {
                    posted = SDL_PrivateMouseMotion(0, 0, rect->ul.x, rect->ul.y);
                }
            }
        }
        break;

        case Ph_EV_BUT_PRESS:
        {
            pointerEvent = PhGetData(phevent);
            buttons = ph2sdl_mousebutton(pointerEvent->buttons);
            if (buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_PRESSED, buttons, 0, 0);
            }
        }
        break;

        case Ph_EV_BUT_RELEASE:
        {
            pointerEvent = PhGetData(phevent);
            buttons = ph2sdl_mousebutton(pointerEvent->buttons);
            if (phevent->subtype == Ph_EV_RELEASE_REAL && buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
            }
            else if(phevent->subtype == Ph_EV_RELEASE_PHANTOM)
            {
                /* If the mouse is outside the window,
                 * only a phantom release event is sent, so
                 * check if the window doesn't have mouse focus.
                 * Not perfect, maybe checking the mouse button
                 * state for Ph_EV_BOUNDARY events would be
                 * better. */
                if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS) == 0)
		{
                    posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
                }
            }
        }
        break;

        case Ph_EV_WM:
        {
            winEvent = PhGetData(phevent);

            /* losing focus */
            if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUSLOST))
            {
                set_motion_sensitivity(this, Ph_EV_PTR_MOTION_BUTTON);
                posted = SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);	
            }
            /* gaining focus */
            else if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUS))
            {
                set_motion_sensitivity(this, -1);
                posted = SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
            }
            /* request quit */
            else if (winEvent->event_f==Ph_WM_CLOSE)
            {
                posted = SDL_PrivateQuit();
            }
            /* request hide/unhide */
            else if (winEvent->event_f==Ph_WM_HIDE)
            {
                if (currently_hided)
                {
                   /* got unhide window event                                */
                   /* TODO: restore application's palette if in palette mode */
                   currently_hided=0;
                }
                else
                {
                   /* got hide window event                                  */
                   /* TODO: restore original palette if in palette mode      */
                   currently_hided=1;
                }
            }
            /* request to resize */
            else if (winEvent->event_f==Ph_WM_RESIZE)
            {
                currently_maximized=0;
                #if (_NTO_VERSION < 630)
                   SDL_PrivateResize(winEvent->size.w+1, winEvent->size.h+1);
                #else
                   /* QNX 6.3.0 have this bug fixed */
                   SDL_PrivateResize(winEvent->size.w, winEvent->size.h);
                #endif /* _NTO_VERSION */
            }
            /* request to move */
            else if (winEvent->event_f==Ph_WM_MOVE)
            {
                if (current_overlay!=NULL)
                {
                   int lockedstate=current_overlay->hwdata->locked;
                   int chromastate=current_overlay->hwdata->ischromakey;
                   int error;
                   SDL_Rect src, dst;

                   current_overlay->hwdata->locked=1;
                   src.x = 0;
                   src.y = 0;
                   src.w = current_overlay->w;
                   src.y = current_overlay->h;
                   dst.x=current_overlay->hwdata->CurrentViewPort.pos.x;
                   dst.y=current_overlay->hwdata->CurrentViewPort.pos.y;
                   dst.w=current_overlay->hwdata->CurrentViewPort.size.w;
                   dst.h=current_overlay->hwdata->CurrentViewPort.size.h;
                   current_overlay->hwdata->ischromakey=0;
                   error=ph_DisplayYUVOverlay(this, current_overlay, &src, &dst);
                   if (!error)
                   {
                       current_overlay->hwdata->ischromakey=chromastate;
                       current_overlay->hwdata->locked=lockedstate;
                   }
                }
            }
            /* maximize request */
            else if (winEvent->event_f==Ph_WM_MAX)
            {
                /* window already moved and resized here */
                currently_maximized=1;
            }
            /* restore request */
            else if (winEvent->event_f==Ph_WM_RESTORE)
            {
                /* window already moved and resized here */
                currently_maximized=0;
            }
        }
        break;

        /* window has been resized, moved or removed */
        case Ph_EV_EXPOSE:
        {
            if (phevent->num_rects!=0)
            {
                int numrects;

                if (SDL_VideoSurface)
                {
                    rect = PhGetRects(phevent);
                    if (phevent->num_rects>PH_SDL_MAX_RECTS)
                    {
                       /* sorry, buffers underrun, we'll update only first PH_SDL_MAX_RECTS rects */
                       numrects=PH_SDL_MAX_RECTS;
                    }

                    for(i=0; i<phevent->num_rects; i++)
                    {
                        sdlrects[i].x = rect[i].ul.x;
                        sdlrects[i].y = rect[i].ul.y;
                        sdlrects[i].w = rect[i].lr.x - rect[i].ul.x + 1;
                        sdlrects[i].h = rect[i].lr.y - rect[i].ul.y + 1;
                    }

                    this->UpdateRects(this, phevent->num_rects, sdlrects);

                    if (current_overlay!=NULL)
                    {
                        int lockedstate=current_overlay->hwdata->locked;
                        int error;
                        SDL_Rect src, dst;