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quake: merge some fixed-point optimizations from PocketQuake

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The PocketQuake project, available below, has some nice fixed-point code:

https://web.archive.org/web/20150412233306/http://quake.pocketmatrix.com/PocketQuake0062_src.zip

I'd like to see most of them merged into our Quake port. This commit
gives +0.9FPS on ipod6g. (A big change given that it was running at
only 9.7FPS to begin with!)

Change-Id: I91931bdd5c22f14fb28616de938a03b4e7d7b076
This commit is contained in:
Franklin Wei 2019-08-09 20:08:10 -04:00
parent 3fffabf50d
commit ee70dad305
10 changed files with 866 additions and 6 deletions
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50
apps/plugins/sdl/progs/quake/r_main.c
View file

@ -62,6 +62,18 @@ vec3_t vup, base_vup;
vec3_t vpn, base_vpn;
vec3_t vright, base_vright;
vec3_t r_origin;
#ifdef USE_PQ_OPT1
int vup_fxp[3];
int vpn_fxp[3];
int vright_fxp[3];
int xscale_fxp, yscale_fxp;
int xcenter_fxp, ycenter_fxp;
int r_refdef_fvrectx_adj_fxp;
int r_refdef_fvrectright_adj_fxp;
int r_refdef_fvrecty_adj_fxp;
int r_refdef_fvrectbottom_adj_fxp;
extern int modelorg_fxp[3];
#endif
//
// screen size info
@ -421,6 +433,17 @@ void R_ViewChanged (vrect_t *pvrect, int lineadj, float aspect)
yscaleinv = 1.0 / yscale;
xscaleshrink = (r_refdef.vrect.width-6)/r_refdef.horizontalFieldOfView;
yscaleshrink = xscaleshrink*pixelAspect;
#ifdef USE_PQ_OPT1
xscale_fxp=(int)(xscale*8388608.0); //9.23
yscale_fxp=(int)(yscale*8388608.0); //9.23
xcenter_fxp=(int)(xcenter*4194304.0); //10.22
ycenter_fxp=(int)(ycenter*4194304.0); //10.22
r_refdef_fvrectx_adj_fxp=(int)(r_refdef.fvrectx_adj*4194304.0);
r_refdef_fvrectright_adj_fxp=(int)(r_refdef.fvrectright_adj*4194304.0);
r_refdef_fvrecty_adj_fxp=(int)(r_refdef.fvrecty_adj*4194304.0);
r_refdef_fvrectbottom_adj_fxp=(int)(r_refdef.fvrectbottom_adj*4194304.0);
#endif
// left side clip
screenedge[0].normal[0] = -1.0 / (xOrigin*r_refdef.horizontalFieldOfView);
@ -789,6 +812,33 @@ void R_DrawBEntitiesOnList (void)
// FIXME: stop transforming twice
R_RotateBmodel ();
#ifdef USE_PQ_OPT1
modelorg_fxp[0]=(int)(modelorg[0]*524288.0);
modelorg_fxp[1]=(int)(modelorg[1]*524288.0);
modelorg_fxp[2]=(int)(modelorg[2]*524288.0);
vright_fxp[0]=(int)(256.0/vright[0]);
if (!vright_fxp[0]) vright_fxp[0]=0x7fffffff;
vright_fxp[1]=(int)(256.0/vright[1]);
if (!vright_fxp[1]) vright_fxp[1]=0x7fffffff;
vright_fxp[2]=(int)(256.0/vright[2]);
if (!vright_fxp[2]) vright_fxp[2]=0x7fffffff;
vpn_fxp[0]=(int)(256.0/vpn[0]);
if (!vpn_fxp[0]) vpn_fxp[0]=0x7fffffff;
vpn_fxp[1]=(int)(256.0/vpn[1]);
if (!vpn_fxp[1]) vpn_fxp[1]=0x7fffffff;
vpn_fxp[2]=(int)(256.0/vpn[2]);
if (!vpn_fxp[2]) vpn_fxp[2]=0x7fffffff;
vup_fxp[0]=(int)(256.0/vup[0]);
if (!vup_fxp[0]) vup_fxp[0]=0x7fffffff;
vup_fxp[1]=(int)(256.0/vup[1]);
if (!vup_fxp[1]) vup_fxp[1]=0x7fffffff;
vup_fxp[2]=(int)(256.0/vup[2]);
if (!vup_fxp[2]) vup_fxp[2]=0x7fffffff;
#endif
// calculate dynamic lighting for bmodel if it's not an
// instanced model
if (clmodel->firstmodelsurface != 0)