/* $XConsortium: wsa_inp.c,v 5.4 94/04/17 20:42:30 hersh Exp $ */

/***********************************************************

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/* PEX/PHIGS workstation input utility functions for the A model (server
 * side workstations and structure storage).  Code in this file must be
 * independent of any PM code.
 */

#include "phg.h"
#include "cp.h"
#include "ws.h"
#include "PEX.h"
#include "PEXproto.h"
#include "PEXmacs.h"
#include "PEXfuncs.h"
#include "phigspex.h"


int
phg_wsa_resolve_stroke( ws, num_pts, dc_pts, determine_z, view_index, wc_pts )
    Ws			*ws;
    int			num_pts;
    pexDeviceCoord      *dc_pts;
    int			determine_z;
    Pint		*view_index;
    Ppoint_list3	*wc_pts;
{
    int			status = 0;
    CARD16		view;
    CARD32		count;
    pexCoord3D		*pex_points;
    pexViewport		*vp;
    Pfloat		z_DC;
    pexBitmask		mask[PEXMSGetWksInfo];

    register int	i;

    if ( determine_z ) {
	bzero((char *)mask, sizeof(mask));   
	PEX_BITSET(mask, PEXPWCurWksViewport);
	if ( PEXGetWksInfo( ws->display, ws->rid, mask, (char **)&vp ) ) {
	    z_DC = vp->maxval.z;
	    for ( i = 0; i < num_pts; i++ )
		dc_pts[i].z = z_DC;
	}
    }

    if ( PEXMapDCtoWC( ws->display, ws->rid, (CARD32)num_pts, dc_pts, &view,
	    &count, &pex_points ) && count > 0 ) {
	for ( i = 0; i < count; i++ ) {
	    wc_pts->points[i].x = pex_points[i].x;
	    wc_pts->points[i].y = pex_points[i].y;
	    wc_pts->points[i].z = pex_points[i].z;
	}
	wc_pts->num_points = count;
	*view_index = view;
	status = 1;

    } else {
	wc_pts->num_points = 0;
    }

    return status;
}


int
phg_wsa_resolve_locator( ws, dc_pt, determine_z, view_index, wc_pt )
    Ws			*ws;
    pexDeviceCoord      *dc_pt;
    int			determine_z;
    Pint		*view_index;
    Ppoint3		*wc_pt;
{
    Ppoint_list3	wc_pts;

    wc_pts.points = wc_pt;
    return phg_wsa_resolve_stroke( ws, 1, dc_pt, determine_z, view_index,
	&wc_pts );
}


int
phg_wsa_resolve_pick( ws, dev, dc_pt, status, depth, path )
    Ws			*ws;
    Ws_inp_pick		*dev;
    pexDeviceCoord	*dc_pt;
    CARD16		*status;
    CARD32		*depth;
    pexPickPath		**path;
{
    pexViewport		*vp;
    pexNpcSubvolume	*win;
    Plimit3		ws_win, ws_vp;
    Ws_xform		ws_xform;
    pexBitmask		mask[PEXMSGetWksInfo];
    pexPD_DC_HitBox	dc_box;
    pexPD_NPC_HitVolume npc_volume;
    pexDeviceCoord2D	dc_vol[2];
    Ppoint		npc_pt[2];
    char		*buf;

    *depth = 0;
    *status = PEXNoPick;

    /* Compute the aperture. */
    bzero((char *)mask, sizeof(mask));   
    switch ( dev->dev_type ) {
	case PEXPickDeviceDC_HitBox:
	    PEX_BITSET(mask, PEXPWCurWksViewport);
	    if ( PEXGetWksInfo( ws->display, ws->rid, mask, (char **)&vp )){
		ws_vp.x_min = vp->minval.x; ws_vp.x_max = vp->maxval.x;
		ws_vp.y_min = vp->minval.y; ws_vp.y_max = vp->maxval.y;
		if ( !WS_PT_IN_LIMIT2( &ws_vp, dc_pt ) )
		    return 0;

		/* Compute the aperture. */
		dc_box.position.x = dc_pt->x;
		dc_box.position.y = dc_pt->y;
		dc_box.distance = dev->ap_size;

		(void)PEXUpdatePickMeasure( ws->display, dev->measure,
		    (CARD32)sizeof(dc_box), (CARD8 *)&dc_box );
	    } else
		return 0;
	    break;

	case PEXPickDeviceNPC_HitVolume:
	    /* Compute the workstation transform, transform the DC point
	     * and DC aperture size to an NPC volume.
	     */
	    PEX_BITSET(mask, PEXPWCurNpcSubvolume);
	    PEX_BITSET(mask, PEXPWCurWksViewport);
	    if ( PEXGetWksInfo( ws->display, ws->rid, mask, (char **)&win)){
		/* Build the current workstation transform. */
		vp = (pexViewport *)(win + 1);
		ws_win.x_min = win->minval.x; ws_win.x_max = win->maxval.x;
		ws_win.y_min = win->minval.y; ws_win.y_max = win->maxval.y;
		ws_win.z_min = win->minval.z; ws_win.z_max = win->maxval.z;
		ws_vp.x_min = vp->minval.x; ws_vp.x_max = vp->maxval.x;
		ws_vp.y_min = vp->minval.y; ws_vp.y_max = vp->maxval.y;
		ws_vp.z_min = vp->minval.z; ws_vp.z_max = vp->maxval.z;
		if ( !WS_PT_IN_LIMIT2( &ws_vp, dc_pt ) )
		    return 0;

		/* Compute the aperture. */
		dc_vol[0].x = dc_pt->x - dev->ap_size;
		dc_vol[0].y = dc_pt->y - dev->ap_size;
		dc_vol[1].x = dc_pt->x + dev->ap_size;
		dc_vol[1].y = dc_pt->y + dev->ap_size;
		phg_wsx_compute_ws_transform( &ws_win, &ws_vp, &ws_xform );
		WS_DC_TO_NPC2(&ws_xform, &dc_vol[0], &npc_pt[0])
		WS_DC_TO_NPC2(&ws_xform, &dc_vol[1], &npc_pt[1])
		npc_volume.minval.x = npc_pt[0].x;
		npc_volume.minval.y = npc_pt[0].y;
		npc_volume.maxval.x = npc_pt[1].x;
		npc_volume.maxval.y = npc_pt[1].y;
		/* The volume extends the full depth of the window. */
		npc_volume.minval.z = win->minval.z;
		npc_volume.maxval.z = win->maxval.z;

		(void)PEXUpdatePickMeasure( ws->display, dev->measure,
		    (CARD32)sizeof(npc_volume), (CARD8 *)&npc_volume );
	    } else
		return 0;
	    break;
    }

    mask[0] = PEXPDPickStatus | PEXPDPickPath;
    if ( !PEXGetPickMeasure( ws->display, dev->measure, mask[0], &buf ) )
	return 0;	/* TODO: use phg_pex_errno */

    *status = (CARD16) *((CARD32 *)buf);
    *depth = *((CARD32 *)(buf + sizeof(CARD32)));
    *path = (pexPickPath *)(buf + 2 * sizeof(CARD32));

    return 1;
}


int
phg_wsa_pick_enable( ws, dev, init_path_size, init_path )
    Ws			*ws;
    Ws_inp_pick		*dev;
    CARD32		init_path_size;
    char		*init_path;	/* must be PEX encoded */
{
    pexBitmask		mask = 0;
    CARD32		size, *card32_p;
    XID			*xid_p;
    CARD16		*card16_p;
    INT16		*int16_p;
    pexViewport		*ev;
    char		buffer[6 * sizeof(CARD32) + sizeof(pexViewport)];

    register char	*buf = buffer;

    /* Set the device data and create a pick measure for this interaction. */
    mask |= PEXPDPickStatus;
    card32_p = (CARD32 *)buf; 
    *card32_p = dev->pick.status == PIN_STATUS_OK ? PEXOk : PEXNoPick;
    buf += sizeof(CARD32);

    mask |= PEXPDPickPathOrder;
    card32_p = (CARD32 *)buf; 
    *card32_p = dev->order == PORDER_TOP_FIRST ? PEXTopFirst : PEXBottomFirst;
    buf += sizeof(CARD32);

    mask |= PEXPDPickIncl;
    xid_p = (XID *)buf; 
    *xid_p = dev->filter.incl;
    buf += sizeof(CARD32);

    mask |= PEXPDPickExcl;
    xid_p = (XID *)buf; 
    *xid_p = dev->filter.excl;
    buf += sizeof(CARD32);

    mask |= PEXPDPickPromptEchoType;
    card32_p = (CARD32 *)buf; 
    *card32_p = (CARD32)dev->pet;
    buf += sizeof(CARD32);

    mask |= PEXPDPickEchoVolume;
    ev = (pexViewport *)buf; 
    ev->minval.x = dev->e_volume.x_min;
    ev->minval.y = dev->e_volume.y_min;
    ev->minval.z = dev->e_volume.z_min;
    ev->maxval.x = dev->e_volume.x_max;
    ev->maxval.y = dev->e_volume.y_max;
    ev->maxval.z = dev->e_volume.z_max;
    ev->useDrawable = 0;
    buf += sizeof(pexViewport);

    mask |= PEXPDPickEchoSwitch;
    card32_p = (CARD32 *)buf; 
    *card32_p = dev->esw == PSWITCH_ECHO ? PEXEcho : PEXNoEcho;
    buf += sizeof(CARD32);

    (void)PEXChangePickDevice( ws->display, ws->rid, dev->dev_type, mask,
															(CARD32)sizeof(buffer), buffer );

    if ( dev->pick.status == PIN_STATUS_OK ) {
	mask = PEXPDPickPath;
	(void)PEXChangePickDevice( ws->display, ws->rid, dev->dev_type, mask,
	    init_path_size, init_path );
    }

    (void)PEXCreatePickMeasure( ws->display, ws->rid,
	dev->measure = XAllocID(ws->display), (pexEnumTypeIndex)dev->dev_type );
    XFlush( ws->display );

    return 1;
}


void
phg_wsa_pick_disable( ws, dev )
    Ws			*ws;
    Ws_inp_pick		*dev;
{
    /* Free and clear the pick measure. */
    if ( dev->measure ) {
	(void)PEXFreePickMeasure( ws->display, dev->measure );
	dev->measure = 0;
    }
}