xref: /external/quake/quake/src/QW/client/r_drawa.asm

 .386P
 .model FLAT
 externdef _d_zistepu:dword
 externdef _d_pzbuffer:dword
 externdef _d_zistepv:dword
 externdef _d_zrowbytes:dword
 externdef _d_ziorigin:dword
 externdef _r_turb_s:dword
 externdef _r_turb_t:dword
 externdef _r_turb_pdest:dword
 externdef _r_turb_spancount:dword
 externdef _r_turb_turb:dword
 externdef _r_turb_pbase:dword
 externdef _r_turb_sstep:dword
 externdef _r_turb_tstep:dword
 externdef _r_bmodelactive:dword
 externdef _d_sdivzstepu:dword
 externdef _d_tdivzstepu:dword
 externdef _d_sdivzstepv:dword
 externdef _d_tdivzstepv:dword
 externdef _d_sdivzorigin:dword
 externdef _d_tdivzorigin:dword
 externdef _sadjust:dword
 externdef _tadjust:dword
 externdef _bbextents:dword
 externdef _bbextentt:dword
 externdef _cacheblock:dword
 externdef _d_viewbuffer:dword
 externdef _cachewidth:dword
 externdef _d_pzbuffer:dword
 externdef _d_zrowbytes:dword
 externdef _d_zwidth:dword
 externdef _d_scantable:dword
 externdef _r_lightptr:dword
 externdef _r_numvblocks:dword
 externdef _prowdestbase:dword
 externdef _pbasesource:dword
 externdef _r_lightwidth:dword
 externdef _lightright:dword
 externdef _lightrightstep:dword
 externdef _lightdeltastep:dword
 externdef _lightdelta:dword
 externdef _lightright:dword
 externdef _lightdelta:dword
 externdef _sourcetstep:dword
 externdef _surfrowbytes:dword
 externdef _lightrightstep:dword
 externdef _lightdeltastep:dword
 externdef _r_sourcemax:dword
 externdef _r_stepback:dword
 externdef _colormap:dword
 externdef _blocksize:dword
 externdef _sourcesstep:dword
 externdef _lightleft:dword
 externdef _blockdivshift:dword
 externdef _blockdivmask:dword
 externdef _lightleftstep:dword
 externdef _r_origin:dword
 externdef _r_ppn:dword
 externdef _r_pup:dword
 externdef _r_pright:dword
 externdef _ycenter:dword
 externdef _xcenter:dword
 externdef _d_vrectbottom_particle:dword
 externdef _d_vrectright_particle:dword
 externdef _d_vrecty:dword
 externdef _d_vrectx:dword
 externdef _d_pix_shift:dword
 externdef _d_pix_min:dword
 externdef _d_pix_max:dword
 externdef _d_y_aspect_shift:dword
 externdef _screenwidth:dword
 externdef _vright:dword
 externdef _vup:dword
 externdef _vpn:dword
 externdef _BOPS_Error:dword
 externdef _snd_scaletable:dword
 externdef _paintbuffer:dword
 externdef _snd_linear_count:dword
 externdef _snd_p:dword
 externdef _snd_vol:dword
 externdef _snd_out:dword
 externdef _r_leftclipped:dword
 externdef _r_leftenter:dword
 externdef _r_rightclipped:dword
 externdef _r_rightenter:dword
 externdef _modelorg:dword
 externdef _xscale:dword
 externdef _r_refdef:dword
 externdef _yscale:dword
 externdef _r_leftexit:dword
 externdef _r_rightexit:dword
 externdef _r_lastvertvalid:dword
 externdef _cacheoffset:dword
 externdef _newedges:dword
 externdef _removeedges:dword
 externdef _r_pedge:dword
 externdef _r_framecount:dword
 externdef _r_u1:dword
 externdef _r_emitted:dword
 externdef _edge_p:dword
 externdef _surface_p:dword
 externdef _surfaces:dword
 externdef _r_lzi1:dword
 externdef _r_v1:dword
 externdef _r_ceilv1:dword
 externdef _r_nearzi:dword
 externdef _r_nearzionly:dword
 externdef _edge_aftertail:dword
 externdef _edge_tail:dword
 externdef _current_iv:dword
 externdef _edge_head_u_shift20:dword
 externdef _span_p:dword
 externdef _edge_head:dword
 externdef _fv:dword
 externdef _edge_tail_u_shift20:dword
 externdef _r_apverts:dword
 externdef _r_anumverts:dword
 externdef _aliastransform:dword
 externdef _r_avertexnormals:dword
 externdef _r_plightvec:dword
 externdef _r_ambientlight:dword
 externdef _r_shadelight:dword
 externdef _aliasxcenter:dword
 externdef _aliasycenter:dword
 externdef _a_sstepxfrac:dword
 externdef _r_affinetridesc:dword
 externdef _acolormap:dword
 externdef _d_pcolormap:dword
 externdef _r_affinetridesc:dword
 externdef _d_sfrac:dword
 externdef _d_ptex:dword
 externdef _d_pedgespanpackage:dword
 externdef _d_tfrac:dword
 externdef _d_light:dword
 externdef _d_zi:dword
 externdef _d_pdest:dword
 externdef _d_pz:dword
 externdef _d_aspancount:dword
 externdef _erroradjustup:dword
 externdef _errorterm:dword
 externdef _d_xdenom:dword
 externdef _r_p0:dword
 externdef _r_p1:dword
 externdef _r_p2:dword
 externdef _a_tstepxfrac:dword
 externdef _r_sstepx:dword
 externdef _r_tstepx:dword
 externdef _a_ststepxwhole:dword
 externdef _zspantable:dword
 externdef _skintable:dword
 externdef _r_zistepx:dword
 externdef _erroradjustdown:dword
 externdef _d_countextrastep:dword
 externdef _ubasestep:dword
 externdef _a_ststepxwhole:dword
 externdef _a_tstepxfrac:dword
 externdef _r_lstepx:dword
 externdef _a_spans:dword
 externdef _erroradjustdown:dword
 externdef _d_pdestextrastep:dword
 externdef _d_pzextrastep:dword
 externdef _d_sfracextrastep:dword
 externdef _d_ptexextrastep:dword
 externdef _d_countextrastep:dword
 externdef _d_tfracextrastep:dword
 externdef _d_lightextrastep:dword
 externdef _d_ziextrastep:dword
 externdef _d_pdestbasestep:dword
 externdef _d_pzbasestep:dword
 externdef _d_sfracbasestep:dword
 externdef _d_ptexbasestep:dword
 externdef _ubasestep:dword
 externdef _d_tfracbasestep:dword
 externdef _d_lightbasestep:dword
 externdef _d_zibasestep:dword
 externdef _zspantable:dword
 externdef _r_lstepy:dword
 externdef _r_sstepy:dword
 externdef _r_tstepy:dword
 externdef _r_zistepy:dword
 externdef _D_PolysetSetEdgeTable:dword
 externdef _D_RasterizeAliasPolySmooth:dword
 externdef float_point5:dword
 externdef Float2ToThe31nd:dword
 externdef izistep:dword
 externdef izi:dword
 externdef FloatMinus2ToThe31nd:dword
 externdef float_1:dword
 externdef float_particle_z_clip:dword
 externdef float_minus_1:dword
 externdef float_0:dword
 externdef fp_16:dword
 externdef fp_64k:dword
 externdef fp_1m:dword
 externdef fp_1m_minus_1:dword
 externdef fp_8:dword
 externdef entryvec_table:dword
 externdef advancetable:dword
 externdef sstep:dword
 externdef tstep:dword
 externdef pspantemp:dword
 externdef counttemp:dword
 externdef jumptemp:dword
 externdef reciprocal_table:dword
 externdef DP_Count:dword
 externdef DP_u:dword
 externdef DP_v:dword
 externdef DP_32768:dword
 externdef DP_Color:dword
 externdef DP_Pix:dword
 externdef DP_EntryTable:dword
 externdef pbase:dword
 externdef s:dword
 externdef t:dword
 externdef sfracf:dword
 externdef tfracf:dword
 externdef snext:dword
 externdef tnext:dword
 externdef spancountminus1:dword
 externdef zi16stepu:dword
 externdef sdivz16stepu:dword
 externdef tdivz16stepu:dword
 externdef zi8stepu:dword
 externdef sdivz8stepu:dword
 externdef tdivz8stepu:dword
 externdef reciprocal_table_16:dword
 externdef entryvec_table_16:dword
 externdef ceil_cw:dword
 externdef single_cw:dword
 externdef fp_64kx64k:dword
 externdef pz:dword
 externdef spr8entryvec_table:dword
_DATA SEGMENT
Ld0 dd 0.0
Ld1 dd 0.0
Lstack dd 0
Lfp_near_clip dd 0.01
Lceilv0 dd 0
Lv dd 0
Lu0 dd 0
Lv0 dd 0
Lzi0 dd 0
_DATA ENDS
_TEXT SEGMENT
 align 4
 public _R_ClipEdge
_R_ClipEdge:
 push esi
 push edi
 push ebx
 mov ds:dword ptr[Lstack],esp
 mov ebx,ds:dword ptr[12+12+esp]
 mov esi,ds:dword ptr[4+12+esp]
 mov edx,ds:dword ptr[8+12+esp]
 test ebx,ebx
 jz Lemit
Lcliploop:
 fld ds:dword ptr[0+0+esi]
 fmul ds:dword ptr[0+0+ebx]
 fld ds:dword ptr[0+4+esi]
 fmul ds:dword ptr[0+4+ebx]
 fld ds:dword ptr[0+8+esi]
 fmul ds:dword ptr[0+8+ebx]
 fxch st(1)
 faddp st(2),st(0)
 fld ds:dword ptr[0+0+edx]
 fmul ds:dword ptr[0+0+ebx]
 fld ds:dword ptr[0+4+edx]
 fmul ds:dword ptr[0+4+ebx]
 fld ds:dword ptr[0+8+edx]
 fmul ds:dword ptr[0+8+ebx]
 fxch st(1)
 faddp st(2),st(0)
 fxch st(3)
 faddp st(2),st(0)
 faddp st(2),st(0)
 fsub ds:dword ptr[12+ebx]
 fxch st(1)
 fsub ds:dword ptr[12+ebx]
 fxch st(1)
 fstp ds:dword ptr[Ld0]
 fstp ds:dword ptr[Ld1]
 mov eax,ds:dword ptr[Ld0]
 mov ecx,ds:dword ptr[Ld1]
 or ecx,eax
 js Lp2
Lcontinue:
 mov ebx,ds:dword ptr[16+ebx]
 test ebx,ebx
 jnz Lcliploop
Lemit:
 fldcw ds:word ptr[ceil_cw]
 cmp ds:dword ptr[_r_lastvertvalid],0
 jz LCalcFirst
 mov eax,ds:dword ptr[_r_lzi1]
 mov ecx,ds:dword ptr[_r_u1]
 mov ds:dword ptr[Lzi0],eax
 mov ds:dword ptr[Lu0],ecx
 mov ecx,ds:dword ptr[_r_v1]
 mov eax,ds:dword ptr[_r_ceilv1]
 mov ds:dword ptr[Lv0],ecx
 mov ds:dword ptr[Lceilv0],eax
 jmp LCalcSecond
LCalcFirst:
 call near ptr LTransformAndProject
 fst ds:dword ptr[Lv0]
 fxch st(2)
 fstp ds:dword ptr[Lu0]
 fstp ds:dword ptr[Lzi0]
 fistp ds:dword ptr[Lceilv0]
LCalcSecond:
 mov esi,edx
 call near ptr LTransformAndProject
 fld ds:dword ptr[Lu0]
 fxch st(3)
 fld ds:dword ptr[Lzi0]
 fxch st(3)
 fld ds:dword ptr[Lv0]
 fxch st(3)
 fist ds:dword ptr[_r_ceilv1]
 fldcw ds:word ptr[single_cw]
 fst ds:dword ptr[_r_v1]
 fxch st(4)
 fcom st(1)
 fnstsw ax
 test ah,1
 jz LP0
 fstp st(0)
 fld st(0)
LP0:
 fxch st(1)
 fstp ds:dword ptr[_r_lzi1]
 fxch st(1)
 fst ds:dword ptr[_r_u1]
 fxch st(1)
 fcom ds:dword ptr[_r_nearzi]
 fnstsw ax
 test ah,045h
 jnz LP1
 fst ds:dword ptr[_r_nearzi]
LP1:
 mov eax,ds:dword ptr[_r_nearzionly]
 test eax,eax
 jz LP2
LPop5AndDone:
 mov eax,ds:dword ptr[_cacheoffset]
 mov edx,ds:dword ptr[_r_framecount]
 cmp eax,07FFFFFFFh
 jz LDoPop
 and edx,07FFFFFFFh
 or edx,080000000h
 mov ds:dword ptr[_cacheoffset],edx
LDoPop:
 fstp st(0)
 fstp st(0)
 fstp st(0)
 fstp st(0)
 fstp st(0)
 jmp Ldone
LP2:
 mov ebx,ds:dword ptr[Lceilv0]
 mov edi,ds:dword ptr[_edge_p]
 mov ecx,ds:dword ptr[_r_ceilv1]
 mov edx,edi
 mov esi,ds:dword ptr[_r_pedge]
 add edx,32
 cmp ebx,ecx
 jz LPop5AndDone
 mov eax,ds:dword ptr[_r_pedge]
 mov ds:dword ptr[28+edi],eax
 fstp ds:dword ptr[24+edi]
 jc LSide0
LSide1:
 fsubp st(3),st(0)
 fsub st(0),st(1)
 fdivp st(2),st(0)
 mov ds:dword ptr[_r_emitted],1
 mov ds:dword ptr[_edge_p],edx
 mov eax,ds:dword ptr[edx]
 mov eax,ecx
 lea ecx,ds:dword ptr[-1+ebx]
 mov ebx,eax
 mov eax,ds:dword ptr[_surface_p]
 mov esi,ds:dword ptr[_surfaces]
 sub edx,edx
 sub eax,esi
 shr eax,6
 mov ds:dword ptr[16+edi],edx
 mov ds:dword ptr[16+2+edi],eax
 sub esi,esi
 mov ds:dword ptr[Lv],ebx
 fild ds:dword ptr[Lv]
 fsubrp st(1),st(0)
 fmul st(0),st(1)
 fadd ds:dword ptr[_r_u1]
 jmp LSideDone
LSide0:
 fsub st(0),st(3)
 fxch st(2)
 fsub st(0),st(1)
 fdivp st(2),st(0)
 mov ds:dword ptr[_r_emitted],1
 mov ds:dword ptr[_edge_p],edx
 mov eax,ds:dword ptr[edx]
 dec ecx
 mov eax,ds:dword ptr[_surface_p]
 mov esi,ds:dword ptr[_surfaces]
 sub edx,edx
 sub eax,esi
 shr eax,6
 mov ds:dword ptr[16+2+edi],edx
 mov ds:dword ptr[16+edi],eax
 mov esi,1
 mov ds:dword ptr[Lv],ebx
 fild ds:dword ptr[Lv]
 fsubrp st(1),st(0)
 fmul st(0),st(1)
 faddp st(2),st(0)
 fxch st(1)
LSideDone:
 fmul ds:dword ptr[fp_1m]
 fxch st(1)
 fmul ds:dword ptr[fp_1m]
 fxch st(1)
 fadd ds:dword ptr[fp_1m_minus_1]
 fxch st(1)
 fistp ds:dword ptr[4+edi]
 fistp ds:dword ptr[0+edi]
 mov eax,ds:dword ptr[0+edi]
 mov edx,ds:dword ptr[_r_refdef+76]
 cmp eax,edx
 jl LP4
 mov edx,ds:dword ptr[_r_refdef+80]
 cmp eax,edx
 jng LP5
LP4:
 mov ds:dword ptr[0+edi],edx
 mov eax,edx
LP5:
 add eax,esi
 mov esi,ds:dword ptr[_newedges+ebx*4]
 test esi,esi
 jz LDoFirst
 cmp ds:dword ptr[0+esi],eax
 jl LNotFirst
LDoFirst:
 mov ds:dword ptr[12+edi],esi
 mov ds:dword ptr[_newedges+ebx*4],edi
 jmp LSetRemove
LNotFirst:
LFindInsertLoop:
 mov edx,esi
 mov esi,ds:dword ptr[12+esi]
 test esi,esi
 jz LInsertFound
 cmp ds:dword ptr[0+esi],eax
 jl LFindInsertLoop
LInsertFound:
 mov ds:dword ptr[12+edi],esi
 mov ds:dword ptr[12+edx],edi
LSetRemove:
 mov eax,ds:dword ptr[_removeedges+ecx*4]
 mov ds:dword ptr[_removeedges+ecx*4],edi
 mov ds:dword ptr[20+edi],eax
Ldone:
 mov esp,ds:dword ptr[Lstack]
 pop ebx
 pop edi
 pop esi
 ret
Lp2:
 test eax,eax
 jns Lp1
 mov eax,ds:dword ptr[Ld1]
 test eax,eax
 jns Lp3
 mov eax,ds:dword ptr[_r_leftclipped]
 mov ecx,ds:dword ptr[_r_pedge]
 test eax,eax
 jnz Ldone
 mov eax,ds:dword ptr[_r_framecount]
 and eax,07FFFFFFFh
 or eax,080000000h
 mov ds:dword ptr[_cacheoffset],eax
 jmp Ldone
Lp1:
 fld ds:dword ptr[Ld0]
 fld ds:dword ptr[Ld1]
 fsubr st(0),st(1)
 mov ds:dword ptr[_cacheoffset],07FFFFFFFh
 fdivp st(1),st(0)
 sub esp,12
 fld ds:dword ptr[0+8+edx]
 fsub ds:dword ptr[0+8+esi]
 fld ds:dword ptr[0+4+edx]
 fsub ds:dword ptr[0+4+esi]
 fld ds:dword ptr[0+0+edx]
 fsub ds:dword ptr[0+0+esi]
 mov edx,esp
 mov eax,ds:dword ptr[20+ebx]
 test al,al
 fmul st(0),st(3)
 fxch st(1)
 fmul st(0),st(3)
 fxch st(2)
 fmulp st(3),st(0)
 fadd ds:dword ptr[0+0+esi]
 fxch st(1)
 fadd ds:dword ptr[0+4+esi]
 fxch st(2)
 fadd ds:dword ptr[0+8+esi]
 fxch st(1)
 fstp ds:dword ptr[0+0+esp]
 fstp ds:dword ptr[0+8+esp]
 fstp ds:dword ptr[0+4+esp]
 jz Ltestright
 mov ds:dword ptr[_r_leftclipped],1
 mov eax,ds:dword ptr[0+0+esp]
 mov ds:dword ptr[_r_leftexit+0+0],eax
 mov eax,ds:dword ptr[0+4+esp]
 mov ds:dword ptr[_r_leftexit+0+4],eax
 mov eax,ds:dword ptr[0+8+esp]
 mov ds:dword ptr[_r_leftexit+0+8],eax
 jmp Lcontinue
Ltestright:
 test ah,ah
 jz Lcontinue
 mov ds:dword ptr[_r_rightclipped],1
 mov eax,ds:dword ptr[0+0+esp]
 mov ds:dword ptr[_r_rightexit+0+0],eax
 mov eax,ds:dword ptr[0+4+esp]
 mov ds:dword ptr[_r_rightexit+0+4],eax
 mov eax,ds:dword ptr[0+8+esp]
 mov ds:dword ptr[_r_rightexit+0+8],eax
 jmp Lcontinue
Lp3:
 mov ds:dword ptr[_r_lastvertvalid],0
 fld ds:dword ptr[Ld0]
 fld ds:dword ptr[Ld1]
 fsubr st(0),st(1)
 mov ds:dword ptr[_cacheoffset],07FFFFFFFh
 fdivp st(1),st(0)
 sub esp,12
 fld ds:dword ptr[0+8+edx]
 fsub ds:dword ptr[0+8+esi]
 fld ds:dword ptr[0+4+edx]
 fsub ds:dword ptr[0+4+esi]
 fld ds:dword ptr[0+0+edx]
 fsub ds:dword ptr[0+0+esi]
 mov eax,ds:dword ptr[20+ebx]
 test al,al
 fmul st(0),st(3)
 fxch st(1)
 fmul st(0),st(3)
 fxch st(2)
 fmulp st(3),st(0)
 fadd ds:dword ptr[0+0+esi]
 fxch st(1)
 fadd ds:dword ptr[0+4+esi]
 fxch st(2)
 fadd ds:dword ptr[0+8+esi]
 fxch st(1)
 fstp ds:dword ptr[0+0+esp]
 fstp ds:dword ptr[0+8+esp]
 fstp ds:dword ptr[0+4+esp]
 mov esi,esp
 jz Ltestright2
 mov ds:dword ptr[_r_leftclipped],1
 mov eax,ds:dword ptr[0+0+esp]
 mov ds:dword ptr[_r_leftenter+0+0],eax
 mov eax,ds:dword ptr[0+4+esp]
 mov ds:dword ptr[_r_leftenter+0+4],eax
 mov eax,ds:dword ptr[0+8+esp]
 mov ds:dword ptr[_r_leftenter+0+8],eax
 jmp Lcontinue
Ltestright2:
 test ah,ah
 jz Lcontinue
 mov ds:dword ptr[_r_rightclipped],1
 mov eax,ds:dword ptr[0+0+esp]
 mov ds:dword ptr[_r_rightenter+0+0],eax
 mov eax,ds:dword ptr[0+4+esp]
 mov ds:dword ptr[_r_rightenter+0+4],eax
 mov eax,ds:dword ptr[0+8+esp]
 mov ds:dword ptr[_r_rightenter+0+8],eax
 jmp Lcontinue
LTransformAndProject:
 fld ds:dword ptr[0+0+esi]
 fsub ds:dword ptr[_modelorg+0]
 fld ds:dword ptr[0+4+esi]
 fsub ds:dword ptr[_modelorg+4]
 fld ds:dword ptr[0+8+esi]
 fsub ds:dword ptr[_modelorg+8]
 fxch st(2)
 fld st(0)
 fmul ds:dword ptr[_vpn+0]
 fld st(1)
 fmul ds:dword ptr[_vright+0]
 fxch st(2)
 fmul ds:dword ptr[_vup+0]
 fld st(3)
 fmul ds:dword ptr[_vpn+4]
 fld st(4)
 fmul ds:dword ptr[_vright+4]
 fxch st(5)
 fmul ds:dword ptr[_vup+4]
 fxch st(1)
 faddp st(3),st(0)
 fxch st(3)
 faddp st(4),st(0)
 faddp st(2),st(0)
 fld st(3)
 fmul ds:dword ptr[_vpn+8]
 fld st(4)
 fmul ds:dword ptr[_vright+8]
 fxch st(5)
 fmul ds:dword ptr[_vup+8]
 fxch st(1)
 faddp st(2),st(0)
 fxch st(4)
 faddp st(3),st(0)
 fxch st(1)
 faddp st(3),st(0)
 fcom ds:dword ptr[Lfp_near_clip]
 fnstsw ax
 test ah,1
 jz LNoClip
 fstp st(0)
 fld ds:dword ptr[Lfp_near_clip]
LNoClip:
 fdivr ds:dword ptr[float_1]
 fxch st(1)
 fld ds:dword ptr[_xscale]
 fmul st(0),st(2)
 fmulp st(1),st(0)
 fadd ds:dword ptr[_xcenter]
 fcom ds:dword ptr[_r_refdef+68]
 fnstsw ax
 test ah,1
 jz LClampP0
 fstp st(0)
 fld ds:dword ptr[_r_refdef+68]
LClampP0:
 fcom ds:dword ptr[_r_refdef+84]
 fnstsw ax
 test ah,045h
 jnz LClampP1
 fstp st(0)
 fld ds:dword ptr[_r_refdef+84]
LClampP1:
 fld st(1)
 fmul ds:dword ptr[_yscale]
 fmulp st(3),st(0)
 fxch st(2)
 fsubr ds:dword ptr[_ycenter]
 fcom ds:dword ptr[_r_refdef+72]
 fnstsw ax
 test ah,1
 jz LClampP2
 fstp st(0)
 fld ds:dword ptr[_r_refdef+72]
LClampP2:
 fcom ds:dword ptr[_r_refdef+88]
 fnstsw ax
 test ah,045h
 jnz LClampP3
 fstp st(0)
 fld ds:dword ptr[_r_refdef+88]
LClampP3:
 ret
_TEXT ENDS
 END