WebSVN – Kolibri OS – Blame – /programs/develop/libraries/TinyGL/asm_fork/clip.asm

Rev	Author	Line No.	Line
5153	IgorA	1	; fill triangle profile
		2	; #define PROFILE
		3
		4	CLIP_XMIN equ (1<<0)
		5	CLIP_XMAX equ (1<<1)
		6	CLIP_YMIN equ (1<<2)
		7	CLIP_YMAX equ (1<<3)
		8	CLIP_ZMIN equ (1<<4)
		9	CLIP_ZMAX equ (1<<5)
		10
		11	offs_X equ 0
		12	offs_Y equ 4
		13	offs_Z equ 8
		14	offs_W equ 12
		15
		16	align 4
		17	proc gl_transform_to_viewport uses eax ebx ecx, context:dword,v:dword
		18	locals
		19	point dd ?
		20	endl
		21	mov eax,[context]
		22	mov ebx,[v]
		23
		24	; coordinates
		25	fld1
		26	fdiv dword[ebx+offs_vert_pc+offs_W] ;st0 = 1/v.pc.W
		27
		28	fld dword[ebx+offs_vert_pc+offs_X] ;st0 = v.pc.X
		29	fmul st0,st1
		30	fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_X]
		31	fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_X]
		32	fistp dword[ebx+offs_vert_zp] ;v.zp.x = st0, st0 = st1
		33
		34	fld dword[ebx+offs_vert_pc+offs_Y] ;st0 = v.pc.Y
		35	fmul st0,st1
		36	fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_Y]
		37	fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_Y]
		38	fistp dword[ebx+offs_vert_zp+offs_zbup_y] ;v.zp.y = st0, st0 = st1
		39
		40	fld dword[ebx+offs_vert_pc+offs_Z] ;st0 = v.pc.Z
		41	fmul st0,st1
		42	fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_Z]
		43	fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_Z]
		44	fistp dword[ebx+offs_vert_zp+offs_zbup_z] ;v.zp.z = st0, st0 = st1
		45
5187	IgorA	46	ffree st0
		47	fincstp
		48
5153	IgorA	49	; color
5208	IgorA	50	cmp dword[eax+offs_cont_lighting_enabled],0 ;if (context.lighting_enabled)
		51	je @f
5153	IgorA	52	mov ecx,ebx
		53	add ecx,offs_vert_zp+offs_zbup_b
		54	push ecx
		55	add ecx,offs_zbup_g-offs_zbup_b
		56	push ecx
		57	add ecx,offs_zbup_r-offs_zbup_g
		58	push ecx
		59	stdcall RGBFtoRGBI, dword[ebx+offs_vert_color],dword[ebx+offs_vert_color+4],dword[ebx+offs_vert_color+8]
		60	jmp .end_if
		61	@@:
		62	; no need to convert to integer if no lighting : take current color
		63	mov ecx,[eax+offs_cont_longcurrent_color]
		64	mov dword[ebx+offs_vert_zp+offs_zbup_r],ecx
		65	mov ecx,[eax+offs_cont_longcurrent_color+4]
		66	mov dword[ebx+offs_vert_zp+offs_zbup_g],ecx
		67	mov ecx,[eax+offs_cont_longcurrent_color+8]
		68	mov dword[ebx+offs_vert_zp+offs_zbup_b],ecx
		69	.end_if:
		70
		71	; texture
		72	bt dword[eax+offs_cont_texture_2d_enabled],0
		73	jnc @f
		74	mov dword[point],dword(ZB_POINT_S_MAX - ZB_POINT_S_MIN)
		75	fild dword[point]
		76	fmul dword[ebx+offs_vert_tex_coord] ;st0 *= v.tex_coord.X
		77	fistp dword[ebx+offs_vert_zp+offs_zbup_s]
		78	add dword[ebx+offs_vert_zp+offs_zbup_s],ZB_POINT_S_MIN
		79
		80	mov dword[point],dword(ZB_POINT_T_MAX - ZB_POINT_T_MIN)
		81	fild dword[point]
		82	fmul dword[ebx+offs_vert_tex_coord+4] ;st0 *= v.tex_coord.Y
		83	fistp dword[ebx+offs_vert_zp+offs_zbup_t]
		84	add dword[ebx+offs_vert_zp+offs_zbup_s],ZB_POINT_T_MIN
		85	@@:
		86	if DEBUG ;gl_transform_to_viewport
		87	push edi
		88	mov ecx,80
		89	mov eax,[ebx+offs_vert_zp]
		90	lea edi,[buf_param]
		91	stdcall convert_int_to_str,ecx
		92	stdcall str_n_cat,edi,txt_zp_sp,2
		93	stdcall str_len,edi
		94	add edi,eax
		95	sub ecx,eax
		96
		97	mov eax,[ebx+offs_vert_zp+offs_zbup_y]
		98	stdcall convert_int_to_str,ecx
		99	stdcall str_n_cat,edi,txt_zp_sp,2
		100	stdcall str_len,edi
		101	add edi,eax
		102	sub ecx,eax
		103
		104	mov eax,[ebx+offs_vert_zp+offs_zbup_z]
		105	stdcall convert_int_to_str,ecx
		106
		107	stdcall str_n_cat,edi,txt_nl,2
		108	stdcall dbg_print,f_ttv,buf_param
		109	pop edi
		110	end if
		111	ret
		112	endp
		113
		114	align 4
		115	proc gl_add_select1 uses eax ebx ecx, context:dword, z1:dword,z2:dword,z3:dword
		116	mov eax,[z1]
		117	mov ebx,eax
		118	cmp [z2],eax
		119	jge @f
		120	mov eax,[z2]
		121	@@:
		122	cmp [z3],eax
		123	jge @f
		124	mov eax,[z3]
		125	@@:
		126	cmp [z2],ebx
		127	jle @f
		128	mov ebx,[z2]
		129	@@:
		130	cmp [z3],ebx
		131	jle @f
		132	mov ebx,[z3]
		133	@@:
		134	mov ecx,0xffffffff
		135	sub ecx,ebx
		136	push ecx
		137	mov ecx,0xffffffff
		138	sub ecx,eax
		139	push ecx
		140	stdcall gl_add_select, [context] ;,0xffffffff-eax,0xffffffff-ebx
		141	ret
		142	endp
		143
		144	; point
		145
		146	align 4
		147	proc gl_draw_point uses eax ebx, context:dword, p0:dword
		148	mov ebx,[p0]
		149	cmp dword[ebx+offs_vert_clip_code],0 ;if (p0.clip_code == 0)
		150	jne @f
		151	mov eax,[context]
		152	cmp dword[eax+offs_cont_render_mode],GL_SELECT
		153	jne .els
		154	stdcall gl_add_select, eax,dword[ebx+offs_vert_zp+offs_zbup_z],dword[ebx+offs_vert_zp+offs_zbup_z] ;p0.zp.z,p0.zp.z
		155	jmp @f
		156	.els:
		157	add ebx,offs_vert_zp
		158	stdcall ZB_plot, dword[eax+offs_cont_zb],ebx
		159	@@:
		160	ret
		161	endp
		162
		163	; line
		164
		165	align 4
		166	proc interpolate uses eax ebx ecx, q:dword,p0:dword,p1:dword,t:dword
		167	mov eax,[q]
		168	mov ebx,[p0]
		169	mov ecx,[p1]
		170	fld dword[t]
		171
		172	; интерполяция по координатам
5175	IgorA	173	fld dword[ecx+offs_vert_pc+offs_X]
		174	fsub dword[ebx+offs_vert_pc+offs_X]
5153	IgorA	175	fmul st0,st1
5175	IgorA	176	fadd dword[ebx+offs_vert_pc+offs_X]
		177	fstp dword[eax+offs_vert_pc+offs_X]
5153	IgorA	178
5175	IgorA	179	fld dword[ecx+offs_vert_pc+offs_Y]
		180	fsub dword[ebx+offs_vert_pc+offs_Y]
5153	IgorA	181	fmul st0,st1
5175	IgorA	182	fadd dword[ebx+offs_vert_pc+offs_Y]
		183	fstp dword[eax+offs_vert_pc+offs_Y]
5153	IgorA	184
5175	IgorA	185	fld dword[ecx+offs_vert_pc+offs_Z]
		186	fsub dword[ebx+offs_vert_pc+offs_Z]
5153	IgorA	187	fmul st0,st1
5175	IgorA	188	fadd dword[ebx+offs_vert_pc+offs_Z]
		189	fstp dword[eax+offs_vert_pc+offs_Z]
5153	IgorA	190
5175	IgorA	191	fld dword[ecx+offs_vert_pc+offs_W]
		192	fsub dword[ebx+offs_vert_pc+offs_W]
5153	IgorA	193	fmul st0,st1
5175	IgorA	194	fadd dword[ebx+offs_vert_pc+offs_W]
		195	fstp dword[eax+offs_vert_pc+offs_W]
5153	IgorA	196
		197	; интерполяция по цвету
		198	fld dword[ecx+offs_vert_color]
		199	fsub dword[ebx+offs_vert_color]
		200	fmul st0,st1
		201	fadd dword[ebx+offs_vert_color]
		202	fstp dword[eax+offs_vert_color]
		203
		204	fld dword[ecx+offs_vert_color+4]
		205	fsub dword[ebx+offs_vert_color+4]
		206	fmul st0,st1
		207	fadd dword[ebx+offs_vert_color+4]
		208	fstp dword[eax+offs_vert_color+4]
		209
		210	fld dword[ecx+offs_vert_color+8]
		211	fsub dword[ebx+offs_vert_color+8]
		212	fmul st0,st1
		213	fadd dword[ebx+offs_vert_color+8]
		214	fstp dword[eax+offs_vert_color+8]
5208	IgorA	215
		216	ffree st0
		217	fincstp
5153	IgorA	218	ret
		219	endp
		220
		221	;
		222	; Line Clipping
		223	;
		224
		225	; Line Clipping algorithm from 'Computer Graphics', Principles and
		226	; Practice
		227	; tmin,tmax -> &float
		228	align 4
		229	proc ClipLine1 uses ebx, denom:dword,num:dword,tmin:dword,tmax:dword
		230	fldz
		231	fcom dword[denom]
		232	fstsw ax
		233	sahf
		234	je .u2
		235	jmp @f
		236	.u2:
		237	fcom dword[num]
		238	fstsw ax
		239	sahf
		240	jb .r0 ;if (denom==0 && num>0) return 0
		241	jmp .r1
		242	@@:
		243
		244	fcom dword[denom]
		245	fstsw ax
		246	sahf
		247	ja .els_0 ;if (0
		248	fld dword[num]
		249	fdiv dword[denom]
		250
		251	mov ebx,[tmax]
		252	fcom dword[ebx]
		253	fstsw ax
		254	sahf
5218	IgorA	255	ja .r0_f2 ;if (t>*tmax) return 0
5153	IgorA	256
		257	mov ebx,[tmin]
		258	fcom dword[ebx]
		259	fstsw ax
		260	sahf
5218	IgorA	261	jbe .r1_f2
5153	IgorA	262	fstp dword[ebx] ;if (t>tmin) tmin=t
		263	jmp .r1
		264
		265	.els_0: ;else if (0>denom)
		266	fld dword[num]
		267	fdiv dword[denom]
		268
		269	mov ebx,[tmin]
		270	fcom dword[ebx]
		271	fstsw ax
		272	sahf
5218	IgorA	273	jb .r0_f2 ;if (t<*tmin) return 0
5153	IgorA	274
		275	mov ebx,[tmax]
		276	fcom dword[ebx]
		277	fstsw ax
		278	sahf
5218	IgorA	279	jae .r1_f2
5153	IgorA	280	fstp dword[ebx] ;if (t<tmin) tmax=t
		281	jmp .r1
		282
5218	IgorA	283	.r0_f2: ;return 0 & free st0,st1
		284	ffree st0
		285	fincstp
		286	.r0: ;return 0 & free st0
5153	IgorA	287	xor eax,eax
		288	jmp .end_f
5218	IgorA	289	.r1_f2: ;return 1 & free st0,st1
		290	ffree st0
		291	fincstp
		292	.r1: ;return 1 & free st0
5153	IgorA	293	xor eax,eax
		294	inc eax
		295	.end_f:
5218	IgorA	296	ffree st0
		297	fincstp
5153	IgorA	298	ret
		299	endp
		300
		301	align 4
5218	IgorA	302	proc gl_draw_line, context:dword, p1:dword, p2:dword
5153	IgorA	303	locals
		304	d_x dd ?
		305	d_y dd ?
		306	d_z dd ?
		307	d_w dd ?
		308	x1 dd ?
		309	y1 dd ?
		310	z1 dd ?
		311	w1 dd ?
		312	q1 GLVertex ?
		313	q2 GLVertex ?
		314	tmin dd ? ;ebp-8
		315	tmax dd ? ;ebp-4
		316	endl
5218	IgorA	317	pushad
5153	IgorA	318	mov edx,[context]
		319	mov edi,[p1]
		320	mov esi,[p2]
		321
		322	cmp dword[edi+offs_vert_clip_code],0
		323	jne .els_i
		324	cmp dword[esi+offs_vert_clip_code],0
		325	jne .els_i
		326	;if ( (p1.clip_code \| p2.clip_code) == 0)
		327	cmp dword[edx+offs_cont_render_mode],GL_SELECT ;if (context.render_mode == GL_SELECT)
		328	jne .els_1
		329	stdcall gl_add_select1, edx,dword[edi+offs_vert_zp+offs_zbup_z],\
		330	dword[esi+offs_vert_zp+offs_zbup_z],dword[esi+offs_vert_zp+offs_zbup_z]
		331	jmp .end_f
		332	.els_1:
		333	add edi,offs_vert_zp
		334	add esi,offs_vert_zp
		335	push esi
		336	push edi
		337	push dword[edx+offs_cont_zb]
		338	cmp dword[edx+offs_cont_depth_test],0
		339	je .els_2
		340	;if (context.depth_test)
		341	call ZB_line_z ;, dword[edx+offs_cont_zb],edi,esi
		342	jmp .end_f
		343	.els_2:
		344	call ZB_line ;, dword[edx+offs_cont_zb],edi,esi
		345	jmp .end_f
		346	.els_i:
		347	;else if ( (p1.clip_code & p2.clip_code) != 0 )
		348	mov eax,[edi+offs_vert_clip_code]
		349	and eax,[esi+offs_vert_clip_code]
		350	cmp eax,0
		351	jne .end_f
		352	.els_0:
		353
		354	fld dword[esi+offs_vert_pc+offs_X]
		355	fsub dword[edi+offs_vert_pc+offs_X]
		356	fstp dword[d_x] ;d_x = p2.pc.X - p1.pc.X
		357	fld dword[esi+offs_vert_pc+offs_Y]
		358	fsub dword[edi+offs_vert_pc+offs_Y]
		359	fstp dword[d_y] ;d_y = p2.pc.Y - p1.pc.Y
		360	fld dword[esi+offs_vert_pc+offs_Z]
		361	fsub dword[edi+offs_vert_pc+offs_Z]
		362	fstp dword[d_z] ;d_z = p2.pc.Z - p1.pc.Z
		363	fld dword[esi+offs_vert_pc+offs_W]
		364	fsub dword[edi+offs_vert_pc+offs_W]
		365	fstp dword[d_w] ;d_w = p2.pc.W - p1.pc.W
		366
		367	mov eax,[edi+offs_vert_pc+offs_X]
		368	mov [x1],eax ;x1 = p1.pc.X
		369	mov eax,[edi+offs_vert_pc+offs_Y]
		370	mov [y1],eax ;y1 = p1.pc.Y
		371	mov eax,[edi+offs_vert_pc+offs_Z]
		372	mov [z1],eax ;z1 = p1.pc.Z
		373	mov eax,[edi+offs_vert_pc+offs_W]
		374	mov [w1],eax ;w1 = p1.pc.W
		375
		376	mov dword[tmin],0.0
		377	mov dword[tmax],1.0
		378
		379	mov eax,ebp
		380	sub eax,4
		381	push eax ;толкаем в стек адрес &tmax
		382	sub eax,4
		383	push eax ;толкаем в стек адрес &tmin
		384	fld dword[x1]
		385	fadd dword[w1]
		386	fchs
		387	fstp dword[esp-4]
		388	fld dword[d_x]
		389	fadd dword[d_w]
		390	fstp dword[esp-8]
		391	sub esp,8
		392	call ClipLine1 ;d_x+d_w,-x1-w1,&tmin,&tmax
		393	bt eax,0
		394	jnc .end_f
		395
		396	sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax
		397	fld dword[x1]
		398	fsub dword[w1]
		399	fstp dword[esp-4]
		400	fld dword[d_w]
		401	fsub dword[d_x]
		402	fstp dword[esp-8]
		403	sub esp,8
		404	call ClipLine1 ;-d_x+d_w,x1-w1,&tmin,&tmax
		405	bt eax,0
		406	jnc .end_f
		407
		408	sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax
		409	fld dword[y1]
		410	fadd dword[w1]
		411	fchs
		412	fstp dword[esp-4]
		413	fld dword[d_y]
		414	fadd dword[d_w]
		415	fstp dword[esp-8]
		416	sub esp,8
		417	call ClipLine1 ;d_y+d_w,-y1-w1,&tmin,&tmax
		418	bt eax,0
		419	jnc .end_f
		420
		421	sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax
		422	fld dword[y1]
		423	fsub dword[w1]
		424	fstp dword[esp-4]
		425	fld dword[d_w]
		426	fsub dword[d_y]
		427	fstp dword[esp-8]
		428	sub esp,8
		429	call ClipLine1 ;-d_y+d_w,y1-w1,&tmin,&tmax
		430	bt eax,0
		431	jnc .end_f
		432
		433	sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax
		434	fld dword[z1]
		435	fadd dword[w1]
		436	fchs
		437	fstp dword[esp-4]
		438	fld dword[d_z]
		439	fadd dword[d_w]
		440	fstp dword[esp-8]
		441	sub esp,8
		442	call ClipLine1 ;d_z+d_w,-z1-w1,&tmin,&tmax
		443	bt eax,0
		444	jnc .end_f
		445
		446	sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax
		447	fld dword[z1]
		448	fsub dword[w1]
		449	fstp dword[esp-4]
		450	fld dword[d_w]
		451	fsub dword[d_z]
		452	fstp dword[esp-8]
		453	sub esp,8
		454	call ClipLine1 ;-d_z+d_w,z1-w1,&tmin,&tmax
		455	bt eax,0
		456	jnc .end_f
		457
		458	mov eax,ebp
		459	sub eax,8+2*sizeof.GLVertex ;eax = &q1
		460	stdcall interpolate, eax,edi,esi,[tmin]
		461	stdcall gl_transform_to_viewport, edx,eax
		462	add eax,sizeof.GLVertex ;eax = &q2
		463	stdcall interpolate, eax,edi,esi,[tmax]
		464	stdcall gl_transform_to_viewport, edx,eax
		465
		466	sub eax,sizeof.GLVertex ;eax = &q1
		467	mov ebx,eax
		468	add ebx,offs_vert_zp+offs_zbup_b
		469	push ebx
		470	add ebx,offs_zbup_g-offs_zbup_b
		471	push ebx
		472	add ebx,offs_zbup_r-offs_zbup_g
		473	push ebx
		474	stdcall RGBFtoRGBI, dword[eax+offs_vert_color],dword[eax+offs_vert_color+4],dword[eax+offs_vert_color+8]
		475
		476	add eax,sizeof.GLVertex ;eax = &q2
		477	mov ebx,eax
		478	add ebx,offs_vert_zp+offs_zbup_b
		479	push ebx
		480	add ebx,offs_zbup_g-offs_zbup_b
		481	push ebx
		482	add ebx,offs_zbup_r-offs_zbup_g
		483	push ebx
		484	stdcall RGBFtoRGBI, dword[eax+offs_vert_color],dword[eax+offs_vert_color+4],dword[eax+offs_vert_color+8]
		485
		486	add eax,offs_vert_zp ;eax = &q2.zp
		487	push eax
		488	sub eax,sizeof.GLVertex ;eax = &q1.zp
		489	push eax
		490	push dword[edx+offs_cont_zb]
		491	cmp dword[edx+offs_cont_depth_test],0
		492	je .els_3
		493	call ZB_line_z ;(context.zb,&q1.zp,&q2.zp)
		494	jmp .end_f
		495	.els_3:
		496	call ZB_line ;(context.zb,&q1.zp,&q2.zp)
		497	.end_f:
5218	IgorA	498	popad
5153	IgorA	499	ret
		500	endp
		501
		502	; triangle
		503
		504	;
		505	; Clipping
		506	;
		507
		508	; We clip the segment [a,b] against the 6 planes of the normal volume.
		509	; We compute the point 'c' of intersection and the value of the parameter 't'
		510	; of the intersection if x=a+t(b-a).
		511	;
		512	; sign: 0 -> '-', 1 -> '+'
		513	macro clip_func sign,dir,dir1,dir2
		514	{
		515	locals
		516	t dd ?
		517	d_X dd ?
		518	d_Y dd ?
		519	d_Z dd ?
		520	d_W dd ?
		521	endl
		522	mov edx,[a]
		523	mov ebx,[b]
		524	mov ecx,[c]
5175	IgorA	525	fld dword[ebx+offs_X]
		526	fsub dword[edx+offs_X]
5153	IgorA	527	fstp dword[d_X] ;d_X = (b.X - a.X)
5175	IgorA	528	fld dword[ebx+offs_Y]
		529	fsub dword[edx+offs_Y]
5153	IgorA	530	fstp dword[d_Y] ;d_Y = (b.Y - a.Y)
5175	IgorA	531	fld dword[ebx+offs_Z]
		532	fsub dword[edx+offs_Z]
5153	IgorA	533	fstp dword[d_Z] ;d_Z = (b.Z - a.Z)
5175	IgorA	534	fld dword[ebx+offs_W]
		535	fsub dword[edx+offs_W]
5153	IgorA	536	fst dword[d_W] ;d_W = (b.W - a.W)
		537	if sign eq 0
		538	fadd dword[d#dir]
		539	else
		540	fsub dword[d#dir]
		541	end if
		542
5218	IgorA	543	ftst
5153	IgorA	544	fstsw ax
		545	sahf
5208	IgorA	546	jne @f
		547	fldz
5153	IgorA	548	fst dword[t] ;t=0
		549	jmp .e_zero
		550	@@: ;else
		551	fld dword[edx+offs#dir]
		552	if sign eq 0
		553	fchs
		554	end if
		555	fsub dword[edx+offs_W]
		556	fdiv st0,st1
		557	fst dword[t] ;t = ( sign a.dir - a.W) / den
		558	.e_zero:
		559
		560	fmul dword[d#dir1] ;st0 = t * d.dir1
		561	fadd dword[edx+offs#dir1]
		562	fstp dword[ecx+offs#dir1] ;c.dir1 = a.dir1 + t * d.dir1
		563
5208	IgorA	564	ffree st0
		565	fincstp
		566
5153	IgorA	567	fld dword[t]
		568	fmul dword[d#dir2] ;st0 = t * d.dir2
		569	fadd dword[edx+offs#dir2]
		570	fstp dword[ecx+offs#dir2] ;c.dir2 = a.dir2 + t * d.dir2
		571
		572	fld dword[t]
		573	fmul dword[d_W]
		574	fadd dword[edx+offs_W]
		575	fst dword[ecx+offs_W] ;c.W = a.W + t * d_W
		576
		577	if sign eq 0
		578	fchs
		579	end if
		580	fstp dword[ecx+offs#dir] ;c.dir = sign c.W
		581	mov eax,[t]
		582	}
		583
		584	align 4
		585	proc clip_xmin uses ebx ecx edx, c:dword, a:dword, b:dword
		586	clip_func 0,_X,_Y,_Z
		587	ret
		588	endp
		589
		590	align 4
		591	proc clip_xmax uses ebx ecx edx, c:dword, a:dword, b:dword
		592	clip_func 1,_X,_Y,_Z
		593	ret
		594	endp
		595
		596	align 4
		597	proc clip_ymin uses ebx ecx edx, c:dword, a:dword, b:dword
		598	clip_func 0,_Y,_X,_Z
		599	ret
		600	endp
		601
		602	align 4
		603	proc clip_ymax uses ebx ecx edx, c:dword, a:dword, b:dword
		604	clip_func 1,_Y,_X,_Z
		605	ret
		606	endp
		607
		608	align 4
		609	proc clip_zmin uses ebx ecx edx, c:dword, a:dword, b:dword
		610	clip_func 0,_Z,_X,_Y
		611	ret
		612	endp
		613
		614	align 4
		615	proc clip_zmax uses ebx ecx edx, c:dword, a:dword, b:dword
		616	clip_func 1,_Z,_X,_Y
		617	ret
		618	endp
		619
		620	align 4
		621	clip_proc dd clip_xmin,clip_xmax, clip_ymin,clip_ymax, clip_zmin,clip_zmax
		622
5175	IgorA	623	align 4
5208	IgorA	624	proc updateTmp uses eax ebx ecx edx, context:dword, q:dword, p0:dword, p1:dword, t:dword
		625	mov ebx,[q]
		626	mov edx,[context]
		627	mov eax,[p0]
5175	IgorA	628	cmp dword[edx+offs_cont_current_shade_model],GL_SMOOTH ;if (context.current_shade_model == GL_SMOOTH)
		629	jne .els_0
5208	IgorA	630	mov ecx,[p1]
		631	fld dword[ecx+offs_vert_color]
		632	fsub dword[eax+offs_vert_color]
		633	fmul dword[t]
		634	fadd dword[eax+offs_vert_color]
		635	fstp dword[ebx+offs_vert_color] ;q.color.v[0]=p0.color.v[0] + (p1.color.v[0]-p0.color.v[0])*t
		636	fld dword[ecx+offs_vert_color+4]
		637	fsub dword[eax+offs_vert_color+4]
		638	fmul dword[t]
		639	fadd dword[eax+offs_vert_color+4]
		640	fstp dword[ebx+offs_vert_color+4] ;q.color.v[1]=p0.color.v[1] + (p1.color.v[1]-p0.color.v[1])*t
		641	fld dword[ecx+offs_vert_color+8]
		642	fsub dword[eax+offs_vert_color+8]
		643	fmul dword[t]
		644	fadd dword[eax+offs_vert_color+8]
		645	fstp dword[ebx+offs_vert_color+8] ;q.color.v[2]=p0.color.v[2] + (p1.color.v[2]-p0.color.v[2])*t
5175	IgorA	646	jmp @f
		647	.els_0:
5208	IgorA	648	mov ecx,[eax+offs_vert_color]
		649	mov [ebx+offs_vert_color],ecx ;q.color.v[0]=p0.color.v[0]
		650	mov ecx,[eax+offs_vert_color+4]
		651	mov [ebx+offs_vert_color+4],ecx ;q.color.v[1]=p0.color.v[1]
		652	mov ecx,[eax+offs_vert_color+8]
		653	mov [ebx+offs_vert_color+8],ecx ;q.color.v[2]=p0.color.v[2]
5175	IgorA	654	@@:
5153	IgorA	655
5175	IgorA	656	cmp dword[edx+offs_cont_texture_2d_enabled],0 ;if (context.texture_2d_enabled)
		657	je @f
5208	IgorA	658	mov ecx,[p1]
		659	fld dword[ecx+offs_vert_tex_coord+offs_X]
		660	fsub dword[eax+offs_vert_tex_coord+offs_X]
		661	fmul dword[t]
		662	fadd dword[eax+offs_vert_tex_coord+offs_X]
		663	fstp dword[ebx+offs_vert_tex_coord+offs_X] ;q.tex_coord.X=p0.tex_coord.X + (p1.tex_coord.X-p0.tex_coord.X)*t
		664	fld dword[ecx+offs_vert_tex_coord+offs_Y]
		665	fsub dword[eax+offs_vert_tex_coord+offs_Y]
		666	fmul dword[t]
		667	fadd dword[eax+offs_vert_tex_coord+offs_Y]
		668	fstp dword[ebx+offs_vert_tex_coord+offs_Y] ;q.tex_coord.Y=p0.tex_coord.Y + (p1.tex_coord.Y-p0.tex_coord.Y)*t
5175	IgorA	669	@@:
5153	IgorA	670
5208	IgorA	671	stdcall gl_clipcode, [ebx+offs_vert_pc+offs_X],[ebx+offs_vert_pc+offs_Y],\
		672	[ebx+offs_vert_pc+offs_Z],[ebx+offs_vert_pc+offs_W]
		673	mov dword[ebx+offs_vert_clip_code],eax
		674	cmp eax,0 ;if (q.clip_code==0)
		675	jne @f
		676	stdcall gl_transform_to_viewport,[context],ebx
		677	mov eax,ebx
		678	add eax,offs_vert_zp+offs_zbup_b
		679	push eax
		680	add eax,offs_zbup_g-offs_zbup_b
		681	push eax
		682	add eax,offs_zbup_r-offs_zbup_g
		683	push eax
		684	stdcall RGBFtoRGBI, dword[ebx+offs_vert_color],dword[ebx+offs_vert_color+4],dword[ebx+offs_vert_color+8]
		685	@@:
5175	IgorA	686	ret
		687	endp
5153	IgorA	688
5175	IgorA	689	align 4
		690	proc gl_draw_triangle, context:dword, p0:dword, p1:dword, p2:dword
		691	locals
		692	cc rd 3
		693	front dd ?
		694	norm dd ? ;float
		695	endl
		696	pushad
		697	mov ebx,[p0]
		698	mov ecx,[p1]
		699	mov edx,[p2]
5213	IgorA	700
5175	IgorA	701	mov edi,[ebx+offs_vert_clip_code]
		702	mov dword[cc],edi
		703	mov eax,[ecx+offs_vert_clip_code]
		704	mov dword[cc+4],eax
		705	or edi,eax
		706	mov eax,[edx+offs_vert_clip_code]
		707	mov dword[cc+8],eax
5208	IgorA	708	or edi,eax ;co = cc[0] \| cc[1] \| cc[2]
5153	IgorA	709
5175	IgorA	710	; we handle the non clipped case here to go faster
5208	IgorA	711	cmp edi,0 ;if (co==0)
5175	IgorA	712	jne .els_0
		713	mov edi,dword[edx+offs_vert_zp+offs_zbup_x]
5208	IgorA	714	sub edi,dword[ebx+offs_vert_zp+offs_zbup_x]
5175	IgorA	715	mov dword[norm],edi
		716	fild dword[norm]
5213	IgorA	717	mov edi,dword[ecx+offs_vert_zp+offs_zbup_y]
		718	sub edi,dword[ebx+offs_vert_zp+offs_zbup_y]
5175	IgorA	719	mov dword[norm],edi
		720	fimul dword[norm]
		721	mov edi,dword[ecx+offs_vert_zp+offs_zbup_x]
		722	sub edi,dword[ebx+offs_vert_zp+offs_zbup_x]
		723	mov dword[norm],edi
		724	fild dword[norm]
		725	mov edi,dword[edx+offs_vert_zp+offs_zbup_y]
5208	IgorA	726	sub edi,dword[ebx+offs_vert_zp+offs_zbup_y]
5175	IgorA	727	mov dword[norm],edi
		728	fimul dword[norm]
5187	IgorA	729	fsubp
5153	IgorA	730
5175	IgorA	731	;st0 = (p1.zp.x-p0.zp.x)(p2.zp.y-p0.zp.y) - (p2.zp.x-p0.zp.x)(p1.zp.y-p0.zp.y)
5153	IgorA	732
5175	IgorA	733	mov dword[front],0
		734	fldz
5187	IgorA	735	fcompp
5175	IgorA	736	fstsw ax
		737	sahf
		738	je .end_f
		739	jb @f
		740	inc dword[front] ;front = 0.0 > norm
		741	@@:
		742	mov edi,[context]
		743	mov eax,dword[edi+offs_cont_current_front_face]
		744	xor dword[front],eax ;front ^= context.current_front_face
5153	IgorA	745
5175	IgorA	746	; back face culling
		747	cmp dword[edi+offs_cont_cull_face_enabled],0
		748	je .els_1
		749	; most used case first
		750	cmp dword[edi+offs_cont_current_cull_face],GL_BACK
		751	jne @f
		752	cmp dword[front],0
		753	je .end_f
		754	stdcall dword[edi+offs_cont_draw_triangle_front], edi,ebx,ecx,edx
		755	jmp .end_f
		756	@@:
		757	cmp dword[edi+offs_cont_current_cull_face],GL_FRONT
		758	jne .end_f
		759	cmp dword[front],0
		760	jne .end_f
		761	stdcall dword[edi+offs_cont_draw_triangle_back], edi,ebx,ecx,edx
		762	jmp .end_f
		763	.els_1:
		764	; no culling
		765	cmp dword[front],0
		766	je @f
		767	stdcall dword[edi+offs_cont_draw_triangle_front], edi,ebx,ecx,edx
5213	IgorA	768	jmp .end_f
5175	IgorA	769	@@:
		770	stdcall dword[edi+offs_cont_draw_triangle_back], edi,ebx,ecx,edx
		771	jmp .end_f
		772	.els_0:
5208	IgorA	773	;eax = cc[2]
5175	IgorA	774	and eax,[cc]
5208	IgorA	775	and eax,[cc+4] ;eax = c_and = cc[0] & cc[1] & cc[2]
		776	cmp eax,0 ;if (c_and==0)
5187	IgorA	777	jne .end_f
5175	IgorA	778	stdcall gl_draw_triangle_clip, [context],ebx,ecx,edx,0
		779	.end_f:
		780	popad
		781	ret
		782	endp
5153	IgorA	783
5175	IgorA	784	align 4
		785	proc gl_draw_triangle_clip, context:dword, p0:dword, p1:dword, p2:dword, clip_bit:dword
		786	locals
		787	co dd ?
		788	cc rd 3
		789	edge_flag_tmp dd ?
		790	clip_mask dd ?
5208	IgorA	791	q rd 3 ;GLVertex*
5175	IgorA	792	tmp1 GLVertex ?
		793	tmp2 GLVertex ?
		794	endl
		795	pushad
		796	mov ebx,[p0]
		797	mov ecx,[p1]
		798	mov edx,[p2]
5208	IgorA	799
5175	IgorA	800	mov edi,[ebx+offs_vert_clip_code]
5208	IgorA	801	mov [cc],edi
5175	IgorA	802	mov eax,[ecx+offs_vert_clip_code]
5208	IgorA	803	mov [cc+4],eax
5175	IgorA	804	or edi,eax
		805	mov eax,[edx+offs_vert_clip_code]
5208	IgorA	806	mov [cc+8],eax
5175	IgorA	807	or edi,eax
5208	IgorA	808	mov [co],edi ;co = cc[0] \| cc[1] \| cc[2]
5175	IgorA	809
5208	IgorA	810	cmp edi,0 ;if (co == 0)
5175	IgorA	811	jne .els_0
		812	stdcall gl_draw_triangle, [context],ebx,ecx,edx
		813	jmp .end_f
		814	.els_0:
5208	IgorA	815	;eax = cc[2]
5175	IgorA	816	and eax,[cc]
5208	IgorA	817	and eax,[cc+4] ;c_and = cc[0] & cc[1] & cc[2]
5175	IgorA	818
		819	; the triangle is completely outside
5208	IgorA	820	cmp eax,0 ;if (c_and!=0) return
5175	IgorA	821	jne .end_f
		822
5208	IgorA	823	; find the next direction to clip
		824	.cycle_0: ;while (clip_bit < 6 && (co & (1 << clip_bit)) == 0)
		825	cmp dword[clip_bit],6
		826	jge .cycle_0_end
		827	xor eax,eax
		828	inc eax
		829	mov ecx,[clip_bit]
		830	shl eax,cl
		831	and eax,[co]
		832	cmp eax,0
		833	jne .cycle_0_end
		834	inc dword[clip_bit]
		835	jmp .cycle_0
		836	.cycle_0_end:
5153	IgorA	837
5175	IgorA	838	; this test can be true only in case of rounding errors
		839	cmp dword[clip_bit],6
		840	if 0
		841	jne @f
5153	IgorA	842	; printf("Error:\n");
		843	; printf("%f %f %f %f\n",p0->pc.X,p0->pc.Y,p0->pc.Z,p0->pc.W);
		844	; printf("%f %f %f %f\n",p1->pc.X,p1->pc.Y,p1->pc.Z,p1->pc.W);
		845	; printf("%f %f %f %f\n",p2->pc.X,p2->pc.Y,p2->pc.Z,p2->pc.W);
5175	IgorA	846	jmp .end_f
		847	@@:
5208	IgorA	848	end if
		849	if 1
5175	IgorA	850	je .end_f
		851	end if
5153	IgorA	852
5208	IgorA	853	xor eax,eax
		854	inc eax
		855	mov ecx,[clip_bit]
		856	shl eax,cl
		857	mov [clip_mask],eax ;1 << clip_bit
		858	mov edi,[cc]
		859	xor edi,[cc+4]
		860	xor edi,[cc+8]
		861	and eax,edi ;eax = co1 = (cc[0] ^ cc[1] ^ cc[2]) & clip_mask
5153	IgorA	862
5208	IgorA	863	mov ecx,[p1] ;востанавливаем после shl ___,cl
5153	IgorA	864
5208	IgorA	865	cmp eax,0 ;if (co1)
		866	je .els_1
		867	; one point outside
		868	mov eax,[cc]
		869	and eax,[clip_mask]
		870	cmp eax,0 ;if (cc[0] & clip_mask)
		871	je .els_2
		872	;q[0]=p0 q[1]=p1 q[2]=p2
		873	mov [q],ebx
		874	mov [q+4],ecx
		875	mov [q+8],edx
		876	jmp .els_2_end
		877	.els_2:
		878	mov eax,[cc+4]
		879	and eax,[clip_mask]
		880	cmp eax,0 ;else if (cc[1] & clip_mask)
		881	je .els_3
		882	;q[0]=p1 q[1]=p2 q[2]=p0
		883	mov [q],ecx
		884	mov [q+4],edx
		885	mov [q+8],ebx
		886	jmp .els_2_end
		887	.els_3:
		888	;q[0]=p2 q[1]=p0 q[2]=p1
		889	mov [q],edx
		890	mov [q+4],ebx
		891	mov [q+8],ecx
		892	.els_2_end:
5153	IgorA	893
5208	IgorA	894	mov ebx,[q]
		895	add ebx,offs_vert_pc
		896	mov ecx,[q+4]
		897	add ecx,offs_vert_pc
		898	mov edx,[q+8]
		899	add edx,offs_vert_pc
5153	IgorA	900
5208	IgorA	901	lea eax,[clip_proc]
		902	mov edi,[clip_bit]
		903	shl edi,2
		904	add eax,edi
		905	mov edi,ebp
		906	sub edi,(2*sizeof.GLVertex)-offs_vert_pc
		907	stdcall dword[eax],edi,ebx,ecx ;clip_proc[clip_bit](&tmp1.pc,&q[0].pc,&q[1].pc)
		908	sub edi,offs_vert_pc
5153	IgorA	909
5208	IgorA	910	sub ebx,offs_vert_pc
		911	sub ecx,offs_vert_pc
		912	stdcall updateTmp,[context],edi,ebx,ecx,eax ;updateTmp(c,&tmp1,q[0],q[1],tt)
		913	add ebx,offs_vert_pc
5153	IgorA	914
5208	IgorA	915	lea eax,[clip_proc]
		916	mov edi,[clip_bit]
		917	shl edi,2
		918	add eax,edi
		919	mov edi,ebp
		920	sub edi,sizeof.GLVertex-offs_vert_pc
		921	stdcall dword[eax],edi,ebx,edx ;clip_proc[clip_bit](&tmp2.pc,&q[0].pc,&q[2].pc)
		922	sub edi,offs_vert_pc
		923	sub ebx,offs_vert_pc
		924	sub edx,offs_vert_pc
		925	stdcall updateTmp,[context],edi,ebx,edx,eax ;updateTmp(c,&tmp2,q[0],q[2],tt)
		926
		927	mov eax,[ebx+offs_vert_edge_flag]
		928	mov [tmp1+offs_vert_edge_flag],eax ;q[0].edge_flag
		929	mov eax,[edx+offs_vert_edge_flag]
		930	mov [edge_flag_tmp],eax ;q[2].edge_flag
		931	mov dword[edx+offs_vert_edge_flag],0 ;q[2].edge_flag=0
		932	mov eax,[clip_bit]
		933	inc eax
		934	push eax ;для вызова нижней функции
		935	mov edi,ebp
		936	sub edi,2*sizeof.GLVertex
		937	stdcall gl_draw_triangle_clip,[context],edi,ecx,edx,eax ;gl_draw_triangle_clip(c,&tmp1,q[1],q[2],clip_bit+1)
		938
		939	mov dword[tmp2.edge_flag],0
		940	mov dword[tmp1.edge_flag],0
		941	mov eax,[edge_flag_tmp]
		942	mov [edx+offs_vert_edge_flag],eax ;q[2].edge_flag=edge_flag_tmp
		943	push edx
		944	push edi
		945	add edi,sizeof.GLVertex ;edi = &tmp2
		946	stdcall gl_draw_triangle_clip,[context],edi ;gl_draw_triangle_clip(c,&tmp2,&tmp1,q[2],clip_bit+1)
		947	jmp .end_f
		948	.els_1:
		949	; two points outside
		950	mov eax,[cc]
		951	and eax,[clip_mask]
		952	cmp eax,0 ;if (cc[0] & clip_mask)==0
		953	jne .els_4
		954	;q[0]=p0 q[1]=p1 q[2]=p2
		955	mov [q],ebx
		956	mov [q+4],ecx
		957	mov [q+8],edx
		958	jmp .els_4_end
		959	.els_4:
		960	mov eax,[cc+4]
		961	and eax,[clip_mask]
		962	cmp eax,0 ;else if (cc[1] & clip_mask)==0
		963	jne .els_5
		964	;q[0]=p1 q[1]=p2 q[2]=p0
		965	mov [q],ecx
		966	mov [q+4],edx
		967	mov [q+8],ebx
		968	jmp .els_4_end
		969	.els_5:
		970	;q[0]=p2 q[1]=p0 q[2]=p1
		971	mov [q],edx
		972	mov [q+4],ebx
		973	mov [q+8],ecx
		974	.els_4_end:
		975
		976	mov ebx,[q]
		977	add ebx,offs_vert_pc
		978	mov ecx,[q+4]
		979	add ecx,offs_vert_pc
		980	mov edx,[q+8]
		981	add edx,offs_vert_pc
		982
		983	lea eax,[clip_proc]
		984	mov edi,[clip_bit]
		985	shl edi,2
		986	add eax,edi
		987	mov edi,ebp
		988	sub edi,(2*sizeof.GLVertex)-offs_vert_pc
		989	stdcall dword[eax],edi,ebx,ecx ;clip_proc[clip_bit](&tmp1.pc,&q[0].pc,&q[1].pc)
		990	sub edi,offs_vert_pc
		991	stdcall updateTmp,[context],edi,[q],[q+4],eax
		992
		993	lea eax,[clip_proc]
		994	mov edi,[clip_bit]
		995	shl edi,2
		996	add eax,edi
		997	mov edi,ebp
		998	sub edi,sizeof.GLVertex-offs_vert_pc
		999	stdcall dword[eax],edi,ebx,edx ;clip_proc[clip_bit](&tmp2.pc,&q[0].pc,&q[2].pc)
		1000	sub edi,offs_vert_pc
		1001	stdcall updateTmp,[context],edi,[q],[q+8],eax
		1002
		1003	mov edx,[q+8]
		1004
		1005	mov dword[tmp1+offs_vert_edge_flag],1
		1006	mov eax,[edx+offs_vert_edge_flag]
		1007	mov dword[tmp1+offs_vert_edge_flag],eax ;tmp2.edge_flag = q[2].edge_flag
		1008	mov eax,[clip_bit]
		1009	inc eax
		1010	push eax
		1011	push edi
		1012	sub edi,sizeof.GLVertex
		1013	stdcall gl_draw_triangle_clip,[context],[q],edi ;gl_draw_triangle_clip(c,q[0],&tmp1,&tmp2,clip_bit+1)
5175	IgorA	1014	.end_f:
		1015	popad
		1016	ret
		1017	endp
5153	IgorA	1018
		1019	align 4
		1020	proc gl_draw_triangle_select uses eax, context:dword, p0:dword,p1:dword,p2:dword
		1021	mov eax,[p2]
		1022	push dword[eax+offs_vert_zp+offs_Z]
		1023	mov eax,[p1]
		1024	push dword[eax+offs_vert_zp+offs_Z]
		1025	mov eax,[p0]
		1026	push dword[eax+offs_vert_zp+offs_Z]
		1027	stdcall gl_add_select1, [context] ;,p0.zp.z, p1.zp.z, p2.zp.z
		1028	ret
		1029	endp
		1030
5175	IgorA	1031	if PROFILE eq 1
		1032	count_triangles dd ?
		1033	count_triangles_textured dd ?
		1034	count_pixels dd ?
		1035	end if
5153	IgorA	1036
		1037	align 4
5175	IgorA	1038	proc gl_draw_triangle_fill, context:dword, p0:dword,p1:dword,p2:dword
		1039	pushad
		1040	if PROFILE eq 1
5153	IgorA	1041	; int norm;
		1042	; assert(p0->zp.x >= 0 && p0->zp.x < c->zb->xsize);
		1043	; assert(p0->zp.y >= 0 && p0->zp.y < c->zb->ysize);
		1044	; assert(p1->zp.x >= 0 && p1->zp.x < c->zb->xsize);
		1045	; assert(p1->zp.y >= 0 && p1->zp.y < c->zb->ysize);
		1046	; assert(p2->zp.x >= 0 && p2->zp.x < c->zb->xsize);
		1047	; assert(p2->zp.y >= 0 && p2->zp.y < c->zb->ysize);
		1048
		1049	; norm=(p1->zp.x-p0->zp.x)*(p2->zp.y-p0->zp.y)-
		1050	; (p2->zp.x-p0->zp.x)*(p1->zp.y-p0->zp.y);
		1051	; count_pixels+=abs(norm)/2;
5175	IgorA	1052	inc dword[count_triangles]
		1053	end if
5153	IgorA	1054
5175	IgorA	1055	mov ebx,[p1]
		1056	add ebx,offs_vert_zp
		1057	mov ecx,[p2]
		1058	add ecx,offs_vert_zp
5153	IgorA	1059	mov edx,[context]
		1060	cmp dword[edx+offs_cont_texture_2d_enabled],0
		1061	je .els_i
		1062	;if (context.texture_2d_enabled)
5175	IgorA	1063	if PROFILE eq 1
		1064	inc dword[count_triangles_textured]
		1065	end if
5153	IgorA	1066	mov eax,dword[edx+offs_cont_current_texture]
		1067	mov eax,[eax] ;переход по указателю
		1068	;так как offs_text_images+offs_imag_pixmap = 0 то context.current_texture.images[0].pixmap = [eax]
		1069	stdcall ZB_setTexture, dword[edx+offs_cont_zb],dword[eax]
5175	IgorA	1070	mov eax,[p0]
		1071	add eax,offs_vert_zp
		1072	stdcall ZB_fillTriangleMappingPerspective, dword[edx+offs_cont_zb],eax,ebx,ecx
5153	IgorA	1073	jmp .end_f
		1074	.els_i:
5175	IgorA	1075	mov eax,[p0]
		1076	add eax,offs_vert_zp
		1077	cmp dword[edx+offs_cont_current_shade_model],GL_SMOOTH
		1078	jne .els
		1079	;else if (context.current_shade_model == GL_SMOOTH)
		1080	stdcall ZB_fillTriangleSmooth, dword[edx+offs_cont_zb],eax,ebx,ecx
		1081	jmp .end_f
		1082	.els:
		1083	stdcall ZB_fillTriangleFlat, dword[edx+offs_cont_zb],eax,ebx,ecx
5153	IgorA	1084	.end_f:
5175	IgorA	1085	popad
5153	IgorA	1086	ret
		1087	endp
		1088
		1089	; Render a clipped triangle in line mode
		1090
		1091	align 4
		1092	proc gl_draw_triangle_line uses eax ebx ecx edx, context:dword, p0:dword,p1:dword,p2:dword
		1093	mov edx,[context]
		1094	cmp dword[edx+offs_cont_depth_test],0
		1095	je .els
		1096	lea ecx,[ZB_line_z]
		1097	jmp @f
		1098	.els:
		1099	lea ecx,[ZB_line]
		1100	@@:
		1101
		1102	;if (p0.edge_flag) ZB_line_z(context.zb,&p0.zp,&p1.zp)
		1103	mov eax,[p0]
		1104	cmp dword[eax+offs_vert_edge_flag],0
		1105	je @f
		1106	mov ebx,eax
		1107	add ebx,offs_vert_zp
		1108	mov eax,[p1]
		1109	add eax,offs_vert_zp
		1110	stdcall ecx,dword[edx+offs_cont_zb],ebx,eax
		1111	@@:
		1112	;if (p1.edge_flag) ZB_line_z(context.zb,&p1.zp,&p2.zp)
		1113	mov eax,[p1]
		1114	cmp dword[eax+offs_vert_edge_flag],0
		1115	je @f
		1116	mov ebx,eax
		1117	add ebx,offs_vert_zp
		1118	mov eax,[p2]
		1119	add eax,offs_vert_zp
		1120	stdcall ecx,dword[edx+offs_cont_zb],ebx,eax
		1121	@@:
		1122	;if (p2.edge_flag) ZB_line_z(context.zb,&p2.zp,&p0.zp);
		1123	mov eax,[p2]
		1124	cmp dword[eax+offs_vert_edge_flag],0
		1125	je @f
		1126	mov ebx,eax
		1127	add ebx,offs_vert_zp
		1128	mov eax,[p0]
		1129	add eax,offs_vert_zp
		1130	stdcall ecx,dword[edx+offs_cont_zb],ebx,eax
		1131	@@:
		1132
		1133	ret
		1134	endp
		1135
		1136	; Render a clipped triangle in point mode
		1137	align 4
		1138	proc gl_draw_triangle_point uses eax ebx edx, context:dword, p0:dword,p1:dword,p2:dword
		1139	mov edx,[context]
		1140	mov eax,[p0]
		1141	cmp dword[eax+offs_vert_edge_flag],0
		1142	je @f
		1143	mov ebx,eax
		1144	add ebx,offs_vert_zp
		1145	stdcall ZB_plot,dword[edx+offs_cont_zb],ebx
		1146	@@:
5187	IgorA	1147	mov eax,[p1]
5153	IgorA	1148	cmp dword[eax+offs_vert_edge_flag],0
		1149	je @f
		1150	mov ebx,eax
		1151	add ebx,offs_vert_zp
		1152	stdcall ZB_plot,dword[edx+offs_cont_zb],ebx
		1153	@@:
5187	IgorA	1154	mov eax,[p2]
5153	IgorA	1155	cmp dword[eax+offs_vert_edge_flag],0
		1156	je @f
		1157	mov ebx,eax
		1158	add ebx,offs_vert_zp
		1159	stdcall ZB_plot,dword[edx+offs_cont_zb],ebx
		1160	@@:
		1161	ret
		1162	endp
		1163
		1164
		1165
		1166

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(root)/programs/develop/libraries/TinyGL/asm_fork/clip.asm – Rev 5218