Subversion Repositories Games.Descent

/*

 * This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>.

 * It is copyright by its individual contributors, as recorded in the

 * project's Git history.  See COPYING.txt at the top level for license

 * terms and a link to the Git history.

 */

/*

 *

 * Setup for 3d library

 *

 */

#include <stdlib.h>

#include "dxxerror.h"

#include "3d.h"

#include "globvars.h"

#include "clipper.h"

#if DXX_USE_OGL

#include "ogl_init.h"

#else

#include "texmap.h"  // for init_interface_vars_to_assembler()

#endif

#include "gr.h"

namespace dcx {

//start the frame

void g3_start_frame(grs_canvas &canvas)

{

        fix s;

        //set int w,h & fixed-point w,h/2

        const int Canvas_width = canvas.cv_bitmap.bm_w;

        const int Canvas_height = canvas.cv_bitmap.bm_h;

        Canv_w2 = Canvas_width << 15;

        Canv_h2 = Canvas_height << 15;

#ifdef __powerc

        fCanv_w2 = f2fl((Canvas_width)<<15);

        fCanv_h2 = f2fl((Canvas_height)<<15);

#endif

        //compute aspect ratio for this canvas

        s = fixmuldiv(grd_curscreen->sc_aspect,Canvas_height,Canvas_width);

        if (s <= f1_0) {           //scale x

                Window_scale.x = s;

                Window_scale.y = f1_0;

        }

        else {

                Window_scale.y = fixdiv(f1_0,s);

                Window_scale.x = f1_0;

        }

        Window_scale.z = f1_0;          //always 1

#if DXX_USE_OGL

        ogl_start_frame(canvas);

#else

        init_interface_vars_to_assembler();             //for the texture-mapper

#endif

}

}