/*
 * Copyright (C) 1996-1997 Id Software, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */
// d_modech.c: called when mode has just changed

#include "quakedef.h"
#include "d_local.h"

int           d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;

int           d_y_aspect_shift, d_pix_min, d_pix_max, d_pix_shift;

int           d_scantable[MAXHEIGHT];
short        *zspantable[MAXHEIGHT];

/*
 * D_Patch
 */
void D_Patch (void) {
#if id386
    static qboolean protectset8 = false;

    if (!protectset8) {
        Sys_MakeCodeWriteable ((int) D_PolysetAff8Start, (int) D_PolysetAff8End - (int) D_PolysetAff8Start);
        protectset8 = true;
    }
#endif                                 // id386
}

/*
 * D_ViewChanged
 */
void D_ViewChanged (void) {
    int           rowbytes;

    if (r_dowarp)
        rowbytes = WARP_WIDTH;
    else
        rowbytes = vid.rowbytes;

    scale_for_mip = xscale;
    if (yscale > xscale)
        scale_for_mip = yscale;

    d_zrowbytes = vid.width * 2;
    d_zwidth = vid.width;

    d_pix_min = r_refdef.vrect.width / 320;
    if (d_pix_min < 1)
        d_pix_min = 1;

    d_pix_max = (int) ((float) r_refdef.vrect.width / (320.0 / 4.0) + 0.5);
    d_pix_shift = 8 - (int) ((float) r_refdef.vrect.width / 320.0 + 0.5);
    if (d_pix_max < 1)
        d_pix_max = 1;

    if (pixelAspect > 1.4)
        d_y_aspect_shift = 1;
    else
        d_y_aspect_shift = 0;

    d_vrectx = r_refdef.vrect.x;
    d_vrecty = r_refdef.vrect.y;
    d_vrectright_particle = r_refdef.vrectright - d_pix_max;
    d_vrectbottom_particle = r_refdef.vrectbottom - (d_pix_max << d_y_aspect_shift);

    {
        int           i;

        for (i = 0; i < vid.height; i++) {
            d_scantable[i] = i * rowbytes;
            zspantable[i] = d_pzbuffer + i * d_zwidth;
        }
    }

    D_Patch ();
}
