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Rev Author Line No. Line
5153 IgorA 1 
;PUTPIXEL -> RGBPIXEL
2 
 
3 
locals
4 
	n dd ?
5 
	d_x dd ?
6 
	d_y dd ?
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	sx dd ? ;ширина буфера в пикселях
8 
	pp_inc_1 dd ?
9 
	pp_inc_2 dd ?
10 
	a dd ? ;register int
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	r dd ? ;register unsigned int
12 
	g dd ?
13 
	b dd ?
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	rinc dd ? ;register unsigned int
15 
	ginc dd ?
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	binc dd ?
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if INTERP_Z eq 1
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	pz dd ? ;register unsigned short *
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	zinc dd ?
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	z dd ? ;register int
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	zz dd ?
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end if
23 
endl
24 
pushad
25 
 
26 
	mov eax,[p1]
27 
	mov ebx,[p2]
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	mov ecx,[ebx+offs_zbup_y]
29 
	cmp [eax+offs_zbup_y], ecx ;if (p1.y > p2.y)
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	jg @f
31 
	jl .end_0 ;if (p1.y != p2.y)
32 
	mov ecx,[ebx+offs_zbup_x]
33 
	cmp [eax+offs_zbup_x], ecx ;if (p1.x > p2.x)
34 
	jle .end_0 ;if (p1.x <= p2.x)
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	@@: ;if (p1.y > p2.y || (p1.y == p2.y && p1.x > p2.x))
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		mov [p1],ebx
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		mov [p2],eax
38 
	.end_0:
39 
 
40 
	mov eax,[zb]
41 
	mov edx,[eax+offs_zbuf_xsize]
42 
	mov [sx],edx
43 
	mov ecx,[p1]
44 
	mov edi,[eax+offs_zbuf_linesize]
45 
	imul edi,[ecx+offs_zbup_y]
46 
	mov edx,[ecx+offs_zbup_x]
47 
	imul edx,PSZB
48 
	add edi,edx
49 
	add edi,[eax+offs_zbuf_pbuf] ;edi = (zb.pbuf + zb.linesize*p1.y + p1.x*PSZB)
50 
if INTERP_Z eq 1
51 
	mov edx,[ecx+offs_zbup_y]
52 
	imul edx,[sx]
53 
	add edx,[ecx+offs_zbup_x]
54 
	add edx,[eax+offs_zbuf_zbuf]
55 
	mov [pz],edx ;pz = zb.zbuf + (p1.y*sx + p1.x)
56 
	mov edx,[ecx+offs_zbup_z]
57 
	mov [z],edx ;z = p1.z
58 
end if
59 
 
60 
	mov ebx,[p2]
61 
	mov eax,[ebx+offs_zbup_x]
62 
	sub eax,[ecx+offs_zbup_x]
63 
	mov [d_x],eax ;d_x = p2.x - p1.x
64 
	mov eax,[ebx+offs_zbup_y]
65 
	sub eax,[ecx+offs_zbup_y]
66 
	mov [d_y],eax ;d_y = p2.y - p1.y
67 
 
68 
	mov eax,[ecx+offs_zbup_r]
69 
	shl eax,8
70 
	mov [r],eax ;r = p1.r << 8
71 
	mov eax,[ecx+offs_zbup_g]
72 
	shl eax,8
73 
	mov [g],eax ;g = p1.g << 8
74 
	mov eax,[ecx+offs_zbup_b]
75 
	shl eax,8
76 
	mov [b],eax ;b = p1.b << 8
77 
 
78 
macro RGBPIXEL
79 
{
80 
if TGL_FEATURE_RENDER_BITS eq 24
81 
	mov eax,[r]
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	shr eax,16
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	mov byte[edi],al
84 
	mov eax,[g]
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	shr eax,16
86 
	mov byte[edi+1],al
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	mov eax,[b]
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	shr eax,16
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	mov byte[edi+2],al
90 
;;;	else
91 
;*pp = RGB_TO_PIXEL(r >> 8,g >> 8,b >> 8)
92 
end if
93 
}
94 
 
95 
macro PUTPIXEL
96 
{
97 
if INTERP_Z eq 1
98 
local .end_0
99 
	mov eax,[z]
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	shr eax, ZB_POINT_Z_FRAC_BITS
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	mov [zz],eax
102 
	cmp eax,[pz]
103 
	jl .end_0
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		RGBPIXEL
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		mov eax,dword[zz]
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		mov [pz],eax
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	.end_0:
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else ; INTERP_Z
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	RGBPIXEL
110 
end if ; INTERP_Z
111 
}
112 
 
113 
macro DRAWLINE d_x,d_y,inc_1,inc_2
114 
{
115 
	mov eax,d_x
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	mov [n],eax
117 
 
118 
	mov ebx,[p1]
119 
	mov ecx,[p2]
120 
if INTERP_Z eq 1
121 
	mov eax,[ecx+offs_zbup_z]
122 
	sub eax,[ebx+offs_zbup_z]
123 
	xor edx,edx
124 
	div dword[n]
125 
	mov [zinc],eax ;zinc=(p2.z-p1.z)/n
126 
end if
127 
 
128 
	;ebx=&p1, ecx=&p2
129 
	mov eax,[ecx+offs_zbup_r]
130 
	sub eax,[ebx+offs_zbup_r]
131 
	shl eax,8
132 
	xor edx,edx
133 
	div dword[n]
134 
	mov [rinc],eax ;rinc=((p2.r-p1.r)<<8)/n
135 
 
136 
	mov eax,[ecx+offs_zbup_g]
137 
	sub eax,[ebx+offs_zbup_g]
138 
	shl eax,8
139 
	xor edx,edx
140 
	div dword[n]
141 
	mov [ginc],eax ;ginc=((p2.g-p1.g)<<8)/n
142 
 
143 
	mov eax,[ecx+offs_zbup_b]
144 
	sub eax,[ebx+offs_zbup_b]
145 
	shl eax,8
146 
	xor edx,edx
147 
	div dword[n]
148 
	mov [binc],eax ;binc=((p2.b-p1.b)<<8)/n
149 
 
150 
	shl dword d_y,1
151 
	mov eax, d_y
152 
	sub eax, d_x
153 
	mov [a],eax ;a=2*d_y-d_x
154 
	shl dword d_x,1
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	mov eax, d_y
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	sub d_x,eax
157 
	mov eax,inc_1
158 
	imul eax,PSZB
159 
	mov [pp_inc_1],eax ;pp_inc_1 = inc_1*PSZB
160 
	mov eax,inc_2
161 
	imul eax,PSZB
162 
	mov [pp_inc_2],eax ;pp_inc_2 = inc_2*PSZB
163 
 
164 
local .do_cycle
165 
local .els_0
166 
local .end_0
167 
 
168 
align 4
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.do_cycle:
170 
 
171 
	PUTPIXEL
172 
if INTERP_Z eq 1
173 
	mov eax,[zinc]
174 
	add [z],eax
175 
end if
176 
	mov eax,[rinc]
177 
	add [r],eax
178 
	mov eax,[ginc]
179 
	add [g],eax
180 
	mov eax,[binc]
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	add [b],eax
182 
 
183 
	cmp dword[a],0
184 
	jle .els_0
185 
	add edi,[pp_inc_1]
186 
if INTERP_Z eq 1
187 
	mov eax,inc_1
188 
	add [pz],eax
189 
end if
190 
	mov eax,d_x
191 
	sub [a],eax
192 
	jmp .end_0
193 
 
194 
.els_0:
195 
	add edi,[pp_inc_2]
196 
if INTERP_Z eq 1
197 
	mov eax,inc_2
198 
	add [pz],eax
199 
end if
200 
	mov eax,d_y
201 
	add [a],eax
202 
 
203 
.end_0:
204 
	dec dword[n]
205 
	cmp dword[n],0
206 
	jge .do_cycle
207 
}
208 
 
209 
; fin macro
210 
 
211 
	mov eax,[d_x]
212 
	cmp eax,0
213 
	jne .els_0
214 
	cmp dword[d_y],0
215 
	jne .els_0
216 
		;if (d_x==0 && d_y==0)
217 
		PUTPIXEL
218 
		jmp .end_2
219 
	.els_0:
220 
	cmp eax,0
221 
	jle .els_3
222 
		;if (d_x > 0)
223 
		mov esi,[sx]
224 
		inc esi
225 
		cmp eax,[d_y]
226 
		jl .els_2
227 
			;if (d_x >= d_y)
228 
			DRAWLINE [d_x], [d_y], esi, 1
229 
			jmp .end_2
230 
		.els_2:
231 
			DRAWLINE [d_y], [d_x], esi, [sx]
232 
			jmp .end_2
233 
	.els_3:
234 
		xor eax,eax
235 
		sub eax,[d_x]
236 
		mov [d_x],eax
237 
		mov esi,[sx]
238 
		dec esi
239 
		cmp eax,[d_y]
240 
		jl .els_4
241 
			;if (d_x >= d_y)
242 
			DRAWLINE [d_x], [d_y], esi, -1
243 
			jmp .end_2
244 
		.els_4:
245 
			DRAWLINE [d_y], [d_x], esi, [sx]
246 
	.end_2:
247 
 
248 
popad
249 
	ret
250 
endp
251 
 
252 
restore INTERP_Z
253 
 
254 
; internal defines
255 
purge DRAWLINE
256 
purge PUTPIXEL
257 
purge RGBPIXEL