/*
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;

    // buffered video (bloody hack) - begin
#ifdef _WIN32
    rowbytes = vid.width;
#else
    // buffered video (bloody hack) - end
    if (r_dowarp) {
        rowbytes = vid.width;    //WARP_WIDTH; // hi-res waterwarp & buffered video - edited
    } else {
        rowbytes = vid.rowbytes;
    }
#endif // buffered video (bloody hack)

    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_max = (int)((float)d_pix_max*fovscale); // FOV-based scaling - fix
    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; // FOV-based scaling - fixed
    d_vrectbottom_particle =
        r_refdef.vrectbottom;// - (d_pix_max << d_y_aspect_shift); // FOV-based scaling - fixed

    {
        int		i;

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

    D_Patch();
}

