68 lines
1.3 KiB
C++
68 lines
1.3 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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/*
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*
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* Setup for 3d library
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*
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*/
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#include <stdlib.h>
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#include "dxxerror.h"
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#include "3d.h"
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#include "globvars.h"
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#if DXX_USE_OGL
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#include "ogl_init.h"
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#else
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#include "texmap.h" // for init_interface_vars_to_assembler()
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#endif
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#include "gr.h"
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namespace dcx {
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//start the frame
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void g3_start_frame(grs_canvas &canvas)
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{
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fix s;
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//set int w,h & fixed-point w,h/2
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const int Canvas_width = canvas.cv_bitmap.bm_w;
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const int Canvas_height = canvas.cv_bitmap.bm_h;
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Canv_w2 = Canvas_width << 15;
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Canv_h2 = Canvas_height << 15;
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#ifdef __powerc
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fCanv_w2 = f2fl((Canvas_width)<<15);
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fCanv_h2 = f2fl((Canvas_height)<<15);
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#endif
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//compute aspect ratio for this canvas
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s = fixmuldiv(grd_curscreen->sc_aspect,Canvas_height,Canvas_width);
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if (s <= f1_0) { //scale x
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Window_scale.x = s;
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Window_scale.y = f1_0;
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}
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else {
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Window_scale.y = fixdiv(f1_0,s);
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Window_scale.x = f1_0;
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}
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Window_scale.z = f1_0; //always 1
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#if DXX_USE_OGL
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ogl_start_frame(canvas);
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#else
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init_interface_vars_to_assembler(); //for the texture-mapper
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#endif
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}
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}
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