;SIZE_X equ 350
;SIZE_Y equ 350
;ROUND equ 8
;TEX_X equ 512
;TEX_Y equ 512
;TEXTURE_SIZE EQU (512*512)-1
;TEX_SHIFT EQU 9
;CATMULL_SHIFT equ 8
;TEXTURE_SIZE EQU (TEX_X * TEX_Y)-1
;Ext = SSE
;SSE = 3
;MMX = 1
;NON = 0
;use32
;------- Big thanks to Majuma (www.majuma.xt.pl) for absolutely great---
;------- DOS 13h mode demos --------------------------------------------
;------- Procedure draws triangle with two overlapped textures, I use --
;--------Catmull Z-buffer algorithm- (Z coordinate interpolation)-------
;--------I calc texture pixel by this way: col1*col2/256 ---------------
two_tex_triangle_z:
;------------------in - eax - x1 shl 16 + y1 -----------
;---------------------- ebx - x2 shl 16 + y2 -----------
;---------------------- ecx - x3 shl 16 + y3 -----------
;---------------------- edx - pointer to b. texture-----
;---------------------- esi - pointer to e. texture-----
;---------------------- edi - pointer to screen buffer--
;---------------------- stack : b. tex coordinates------
;---------------------- e. tex coordinates------
;---------------------- Z position coordinates--
;---------------------- pointer io Z buffer-----
;-- Z-buffer - filled with coordinates as dword --------
;-- (Z coor. as word) shl CATMULL_SHIFT ----------------
.b_x1 equ ebp+4 ; procedure don't save registers !!!
.b_y1 equ ebp+6 ; each coordinate as word
.b_x2 equ ebp+8
.b_y2 equ ebp+10 ; b - first texture
.b_x3 equ ebp+12
.b_y3 equ ebp+14 ; e - second texture
.e_x1 equ ebp+16
.e_y1 equ ebp+18
.e_x2 equ ebp+20
.e_y2 equ ebp+22
.e_x3 equ ebp+24
.e_y3 equ ebp+26
.z1 equ word[ebp+28]
.z2 equ word[ebp+30]
.z3 equ word[ebp+32]
.z_buff equ dword[ebp+34] ; pointer to Z-buffer
.t_bmap equ dword[ebp-4] ; pointer to b. texture
.t_emap equ dword[ebp-8] ; pointer to e. texture
.x1 equ word[ebp-10]
.y1 equ word[ebp-12]
.x2 equ word[ebp-14]
.y2 equ word[ebp-16]
.x3 equ word[ebp-18]
.y3 equ word[ebp-20]
.dx12 equ dword[ebp-24]
.dbx12 equ dword[ebp-28]
.dby12 equ dword[ebp-32]
.dby12q equ [ebp-32]
.dex12 equ dword[ebp-36]
.dey12 equ dword[ebp-40]
.dey12q equ [ebp-40]
.dz12 equ dword[ebp-44]
.dx13 equ dword[ebp-48]
.dbx13 equ dword[ebp-52]
.dby13 equ dword[ebp-56]
.dby13q equ [ebp-56]
.dex13 equ dword[ebp-60]
.dey13 equ dword[ebp-64]
.dey13q equ [ebp-64]
.dz13 equ dword[ebp-68]
.dx23 equ dword[ebp-72]
.dbx23 equ dword[ebp-76]
.dby23 equ dword[ebp-80]
.dby23q equ [ebp-80]
.dex23 equ dword[ebp-84]
.dey23 equ dword[ebp-88]
.dey23q equ [ebp-88]
.dz23 equ dword[ebp-92]
.cx1 equ dword[ebp-96] ; current variables
.cx2 equ dword[ebp-100]
;.cbx1q equ [ebp-104]
.cbx1 equ dword[ebp-104]
.cby1 equ [ebp-108]
;.cbx2q [ebp-112]
.cbx2 equ dword[ebp-112]
.cby2 equ [ebp-116]
;.cex1q equ [ebp-120]
.cex1 equ dword[ebp-120]
.cey1 equ [ebp-124]
;.cex2q equ [ebp-128]
.cex2 equ dword[ebp-128]
.cey2 equ [ebp-132]
.cz1 equ dword[ebp-136]
.cz2 equ dword[ebp-140]
if Ext >= MMX
emms
else
cld
end if
mov ebp,esp
push edx esi ; store bump map
; push esi ; store e. map
; sub esp,120
.sort3: ; sort triangle coordinates...
cmp ax,bx
jle .sort1
xchg eax,ebx
mov edx,dword[.b_x1]
xchg edx,dword[.b_x2]
mov dword[.b_x1],edx
mov edx,dword[.e_x1]
xchg edx,dword[.e_x2]
mov dword[.e_x1],edx
mov dx,.z1
xchg dx,.z2
mov .z1,dx
.sort1:
cmp bx,cx
jle .sort2
xchg ebx,ecx
mov edx,dword[.b_x2]
xchg edx,dword[.b_x3]
mov dword[.b_x2],edx
mov edx,dword[.e_x2]
xchg edx,dword[.e_x3]
mov dword[.e_x2],edx
mov dx,.z2
xchg dx,.z3
mov .z2,dx
jmp .sort3
.sort2:
push eax ebx ecx ; store triangle coords in variables
; push ebx
; push ecx
mov edx,80008000h ; eax,ebx,ecx are ANDd together into edx which means that
and edx,ebx ; if *all* of them are negative a sign flag is raised
and edx,ecx
and edx,eax
test edx,80008000h ; Check both X&Y at once
jne .loop23_done
; mov edx,eax ; eax,ebx,ecx are ORd together into edx which means that
; or edx,ebx ; if any *one* of them is negative a sign flag is raised
; or edx,ecx
; test edx,80000000h ; Check only X
; jne .loop23_done
; cmp .x1,SIZE_X ; {
; jg .loop23_done
; cmp .x2,SIZE_X ; This can be optimized with effort
; jg .loop23_done
; cmp .x3,SIZE_X
; jg .loop23_done ; {
mov bx,.y2 ; calc delta 12
sub bx,.y1
jnz .bt_dx12_make
mov ecx,6
xor edx,edx
@@:
push edx ;dword 0
loop @b
jmp .bt_dx12_done
.bt_dx12_make:
mov ax,.x2
sub ax,.x1
cwde
movsx ebx,bx
shl eax,ROUND
cdq
idiv ebx
; mov .dx12,eax
push eax
if Ext=SSE
sub esp,16
cvtsi2ss xmm3,ebx ;rcps
; mov eax,255
cvtsi2ss xmm4,[i255d] ;eax
divss xmm3,xmm4
rcpss xmm3,xmm3
; mulss xmm3,xmm4
shufps xmm3,xmm3,0
movd mm0,[.b_x1]
movd mm1,[.b_x2]
movd mm2,[.e_x1]
movd mm3,[.e_x2]
; psubsw mm3,mm2
; psubsw mm1,mm0
pxor mm4,mm4
punpcklwd mm0,mm4
punpcklwd mm1,mm4
punpcklwd mm2,mm4
punpcklwd mm3,mm4
; pslld mm0,ROUND
; pslld mm1,ROUND
; pslld mm2,ROUND
; pslld mm3,ROUND
cvtpi2ps xmm0,mm0
movlhps xmm0,xmm0
cvtpi2ps xmm0,mm2
cvtpi2ps xmm1,mm1
movlhps xmm1,xmm1
cvtpi2ps xmm1,mm3
subps xmm1,xmm0
; pxor mm4,mm4
; movq mm5,mm1
; movq mm6,mm1
; pcmpeqb mm5,mm4
; psubd mm1,mm0
; psubd mm3,mm2
; movq mm0,[.b_x1] ; bx1 by1 bx2 by2
; movq mm1,[.e_x1] ; ex1 ey1 ex2 ey2
; pxor
; punpcklhd mm0,mm1 ; lwd ;
; psubw mm1,mm0 ; mm1, mm0
; pxor mm2,mm2
; pmovmaskb eax,mm1
; and eax,10101010b
; pcmpgtw mm2,mm1
; punpcklwd mm1,mm2
; psllw mm0,ROUND
; psllw mm1,ROUND
; movq mm2,mm0
; psrlq mm0,32
; cvtpi2ps xmm0,mm1
; movlhps xmm0,xmm0
; cvtpi2ps xmm0,mm3
; divps xmm1,xmm3
mulps xmm1,xmm3
shufps xmm1,xmm1,10110001b
cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
movhlps xmm1,xmm1
cvtps2pi mm1,xmm1
movq .dey12q,mm0
movq .dby12q,mm1
; movd .dex12,mm0
; psrlq mm0,32
; movd .dey12,mm0
; movhlps xmm1,xmm1
; cvtps2pi mm0,xmm1
; movd .dbx12,mm0
; psrlq mm0,32
; movd .dby12,mm0
else
mov ax,word[.b_x2]
sub ax,word[.b_x1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dbx12,eax
push eax
mov ax,word[.b_y2]
sub ax,word[.b_y1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dby12,eax
push eax
; mov eax,.dbx12
; mov ebx,.dby12
; int3
mov ax,word[.e_x2]
sub ax,word[.e_x1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dex12,eax
push eax
mov ax,word[.e_y2]
sub ax,word[.e_y1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dey12,eax
push eax
end if
mov ax,.z2
sub ax,.z1
cwde
shl eax,CATMULL_SHIFT
cdq
idiv ebx
push eax
.bt_dx12_done:
mov bx,.y3 ; calc delta13
sub bx,.y1
jnz .bt_dx13_make
mov ecx,6
xor edx,edx
@@:
push edx ;dword 0
loop @b
jmp .bt_dx13_done
.bt_dx13_make:
mov ax,.x3
sub ax,.x1
cwde
movsx ebx,bx
shl eax,ROUND
cdq
idiv ebx
; mov .dx13,eax
push eax
if Ext=SSE
cvtsi2ss xmm3,ebx
; mov eax,255
cvtsi2ss xmm4,[i255d]
divss xmm3,xmm4
rcpss xmm3,xmm3
; mulss xmm3,xmm4
shufps xmm3,xmm3,0
sub esp,16
movd mm0,[.b_x1]
movd mm1,[.b_x3]
movd mm2,[.e_x1]
movd mm3,[.e_x3]
pxor mm4,mm4
punpcklwd mm0,mm4
punpcklwd mm1,mm4
punpcklwd mm2,mm4
punpcklwd mm3,mm4
cvtpi2ps xmm0,mm0
movlhps xmm0,xmm0
cvtpi2ps xmm0,mm2
cvtpi2ps xmm1,mm1
movlhps xmm1,xmm1
cvtpi2ps xmm1,mm3
subps xmm1,xmm0
; divps xmm1,xmm3
mulps xmm1,xmm3
shufps xmm1,xmm1,10110001b
cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
movhlps xmm1,xmm1
cvtps2pi mm1,xmm1
movq .dey13q,mm0
movq .dby13q,mm1
else
mov ax,word[.b_x3]
sub ax,word[.b_x1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dbx13,eax
push eax
mov ax,word[.b_y3]
sub ax,word[.b_y1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dby13,eax
push eax
mov ax,word[.e_x3]
sub ax,word[.e_x1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dex13,eax
push eax
mov ax,word[.e_y3]
sub ax,word[.e_y1]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dey13,eax
push eax
end if
mov ax,.z3
sub ax,.z1
cwde
shl eax,CATMULL_SHIFT
cdq
idiv ebx
; mov .dz13,eax
push eax
.bt_dx13_done:
mov bx,.y3 ; calc delta23
sub bx,.y2
jnz .bt_dx23_make
mov ecx,6
xor edx,edx
@@:
push edx ;dword 0
loop @b
jmp .bt_dx23_done
.bt_dx23_make:
mov ax,.x3
sub ax,.x2
cwde
movsx ebx,bx
shl eax,ROUND
cdq
idiv ebx
; mov .dx23,eax
push eax
if Ext=SSE
cvtsi2ss xmm3,ebx
; mov eax,255
cvtsi2ss xmm4,[i255d] ;eax
divss xmm3,xmm4
shufps xmm3,xmm3,0
sub esp,16
movd mm0,[.b_x2]
movd mm1,[.b_x3]
movd mm2,[.e_x2]
movd mm3,[.e_x3]
pxor mm4,mm4
punpcklwd mm0,mm4
punpcklwd mm1,mm4
punpcklwd mm2,mm4
punpcklwd mm3,mm4
cvtpi2ps xmm0,mm0
movlhps xmm0,xmm0
cvtpi2ps xmm0,mm2
cvtpi2ps xmm1,mm1
movlhps xmm1,xmm1
cvtpi2ps xmm1,mm3
subps xmm1,xmm0
divps xmm1,xmm3
shufps xmm1,xmm1,10110001b
cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
movhlps xmm1,xmm1
cvtps2pi mm1,xmm1
movq .dey23q,mm0
movq .dby23q,mm1
else
mov ax,word[.b_x3]
sub ax,word[.b_x2]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dbx23,eax
push eax
mov ax,word[.b_y3]
sub ax,word[.b_y2]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dby23,eax
push eax
mov ax,word[.e_x3]
sub ax,word[.e_x2]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dex23,eax
push eax
mov ax,word[.e_y3]
sub ax,word[.e_y2]
cwde
shl eax,ROUND
cdq
idiv ebx
; mov .dey23,eax
push eax
end if
mov ax,.z3
sub ax,.z2
cwde
shl eax,CATMULL_SHIFT
cdq
idiv ebx
; mov .dz23,eax
push eax
; sub esp,40
.bt_dx23_done:
movsx eax,.x1
shl eax,ROUND
; mov .cx1,eax
; mov .cx2,eax
push eax eax
; push eax
movsx eax,word[.b_x1]
shl eax,ROUND
mov .cbx1,eax
mov .cbx2,eax
; push eax eax
; push eax
movsx eax,word[.b_y1]
shl eax,ROUND
mov .cby1,eax
mov .cby2,eax
; push eax eax
; push eax
movsx eax,word[.e_x1]
shl eax,ROUND
mov .cex1,eax
mov .cex2,eax
; push eax eax
;push eax
movsx eax,word[.e_y1]
shl eax,ROUND
mov .cey1,eax
mov .cey2,eax
sub esp,32
; push eax eax
;push eax
movsx eax,.z1
shl eax,CATMULL_SHIFT
; mov .cz1,eax
; mov .cz2,eax
push eax eax
;push eax
movsx ecx,.y1
cmp cx,.y2
jge .loop12_done
.loop12:
call .call_line
mov eax,.dx13
add .cx1,eax
mov ebx,.dx12
add .cx2,ebx
if Ext >= MMX
movq mm0,.cby2 ; with this optimization object
movq mm1,.cby1 ; looks bit annoying
movq mm2,.cey2
movq mm3,.cey1
paddd mm0,.dby12q
paddd mm1,.dby13q
paddd mm2,.dey12q
paddd mm3,.dey13q
movq .cby2,mm0
movq .cby1,mm1
movq .cey1,mm3
movq .cey2,mm2
else
mov edx,.dbx13
add .cbx1,edx
mov eax,.dbx12
add .cbx2,eax
mov ebx,.dby13
add .cby1,ebx
mov edx,.dby12
add .cby2,edx
mov eax,.dex13
add .cex1,eax
mov ebx,.dex12
add .cex2,ebx
mov edx,.dey13
add .cey1,edx
mov eax,.dey12
add .cey2,eax
end if
mov ebx,.dz13
add .cz1,ebx
mov edx,.dz12
add .cz2,edx
inc ecx
cmp cx,.y2
jl .loop12
.loop12_done:
movsx ecx,.y2
cmp cx,.y3
jge .loop23_done
movsx eax,.z2
shl eax,CATMULL_SHIFT
mov .cz2,eax
movsx eax,.x2
shl eax,ROUND
mov .cx2,eax
movzx eax,word[.b_x2]
shl eax,ROUND
mov .cbx2,eax
movzx eax,word[.b_y2]
shl eax,ROUND
mov .cby2,eax
movzx eax,word[.e_x2]
shl eax,ROUND
mov .cex2,eax
movzx eax,word[.e_y2]
shl eax,ROUND
mov .cey2,eax
.loop23:
call .call_line
;if Ext = NON
mov eax,.dx13
add .cx1,eax
mov ebx,.dx23
add .cx2,ebx
if Ext >= MMX
movq mm0,.cby2 ; with this mmx optimization object looks bit
movq mm1,.cby1 ; annoying
movq mm2,.cey2
movq mm3,.cey1
paddd mm0,.dby23q
paddd mm1,.dby13q
paddd mm2,.dey23q
paddd mm3,.dey13q
movq .cby2,mm0
movq .cby1,mm1
movq .cey2,mm2
movq .cey1,mm3
else
mov edx,.dbx13
add .cbx1,edx
mov eax,.dbx23
add .cbx2,eax
mov ebx,.dby13
add .cby1,ebx
mov edx,.dby23
add .cby2,edx
mov eax,.dex13
add .cex1,eax
mov ebx,.dex23
add .cex2,ebx
mov edx,.dey13
add .cey1,edx
mov eax,.dey23
add .cey2,eax
end if
mov ebx,.dz13
add .cz1,ebx
mov edx,.dz23
add .cz2,edx
;else
; movq mm0,.db13q
; movq mm1,.cbx1q
inc ecx
cmp cx,.y3
jl .loop23
.loop23_done:
mov esp,ebp
ret 34
.call_line:
pushad
push .cz1
push .cz2
push .z_buff
push .t_emap
push .t_bmap
push dword .cey2
push .cex2
push dword .cey1
push .cex1
push dword .cby2
push .cbx2
push dword .cby1
push .cbx1
push ecx
mov eax,.cx1
sar eax,ROUND
mov ebx,.cx2
sar ebx,ROUND
call two_tex_line_z
popad
ret
two_tex_line_z:
;--------------in: eax - x1
;-------------- ebx - x2
;-------------- edi - pointer to screen buffer
;stack - another parameters :
.y equ dword [ebp+4]
.bx1q equ [ebp+8]
.bx1 equ dword [ebp+8] ; ---
.by1 equ dword [ebp+12] ; |
.bx2q equ [ebp+16]
.bx2 equ dword [ebp+16] ; |
.by2 equ dword [ebp+20] ; |> b. texture and e. texture coords
.ex1q equ [ebp+24]
.ex1 equ dword [ebp+24] ; |> shifted shl ROUND
.ey1 equ dword [ebp+28] ; |
.ex2q equ [ebp+32]
.ex2 equ dword [ebp+32] ; |
.ey2 equ dword [ebp+36] ; ---
.bmap equ dword [ebp+40] ; b texture offset
.emap equ dword [ebp+44] ; e texture offset
.z_buff equ dword [ebp+48]
.z2 equ dword [ebp+52] ; -- |> z coords shifted
.z1 equ dword [ebp+56] ; -- shl CATMULL_SHIFT
.x1 equ dword [ebp-4]
.x2 equ dword [ebp-8]
.dbx equ dword [ebp-12]
.dby equ dword [ebp-16]
.dbyq equ qword [ebp-16] ; - new
.dex equ dword [ebp-20]
.dey equ dword [ebp-24]
.deyq equ qword [ebp-24] ; - new
.dz equ dword [ebp-28]
.cbx equ dword [ebp-32]
.cby equ dword [ebp-36]
.cbyq equ qword [ebp-36] ; - new
.cex equ dword [ebp-40]
.cey equ dword [ebp-44]
.ceyq equ qword [ebp-44] ; - new
.cz equ dword [ebp-48]
.czbuff equ dword [ebp-52]
mov ebp,esp
mov ecx,.y
or ecx,ecx
jl .bl_end
cmp ecx,SIZE_Y
jge .bl_end
cmp eax,ebx
jl @f
je .bl_end
xchg eax,ebx
if Ext=NON
mov edx,.bx1
xchg edx,.bx2
mov .bx1,edx
mov edx,.by1
xchg edx,.by2
mov .by1,edx
mov edx,.ex1
xchg edx,.ex2
mov .ex1,edx
mov edx,.ey1
xchg edx,.ey2
mov .ey1,edx
else
movq mm0,.bx1q
movq mm1,.ex1q
movq mm2,.bx2q
movq mm3,.ex2q
movq .bx2q,mm0
movq .ex2q,mm1
movq .bx1q,mm2
movq .ex1q,mm3
end if
mov edx,.z1
xchg edx,.z2
mov .z1,edx
@@:
push eax ebx
; push ebx ;store x1, x2
cmp .x1,SIZE_X
jge .bl_end
cmp .x2,0
jle .bl_end
mov ebx,.x2
sub ebx,.x1
if Ext=SSE
sub esp,16
cvtsi2ss xmm3,ebx ;rcps
shufps xmm3,xmm3,0
; movq mm0,.bx1q
; movq mm1,.bx2q
; movq mm2,.ex1q
; movq mm3,.ex2q
; psubd mm1,mm0
; psubd mm3,mm2
; cvtpi2ps xmm1,mm1
; movlhps xmm1,xmm1
; cvtpi2ps xmm1,mm3
cvtpi2ps xmm0,.bx1q ;mm0
movlhps xmm0,xmm0
cvtpi2ps xmm0,.ex1q ;mm2
cvtpi2ps xmm1,.bx2q ;mm1
movlhps xmm1,xmm1
cvtpi2ps xmm1,.ex2q ;mm3
subps xmm1,xmm0
divps xmm1,xmm3
shufps xmm1,xmm1,10110001b
cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
movhlps xmm1,xmm1
cvtps2pi mm1,xmm1
movq .deyq,mm0
movq .dbyq,mm1
else
mov eax,.bx2 ; calc .dbx
sub eax,.bx1
cdq
idiv ebx
push eax
mov eax,.by2 ; calc .dby
sub eax,.by1
cdq
idiv ebx
push eax
mov eax,.ex2 ; calc .dex
sub eax,.ex1
cdq
idiv ebx
push eax
mov eax,.ey2 ; calc .dey
sub eax,.ey1
cdq
idiv ebx
push eax
end if
mov eax,.z2 ; calc .dz
sub eax,.z1
cdq
idiv ebx
push eax
cmp .x1,0 ; set correctly begin variable
jge @f ; CLIPPING ON FUNCTION
; cutting triangle exceedes screen
mov ebx,.x1
neg ebx
imul ebx ; eax = .dz * abs(.x1)
add .z1,eax
mov .x1,0
mov eax,.dbx
imul ebx
add .bx1,eax
mov eax,.dby
imul ebx
add .by1,eax
mov eax,.dex
imul ebx
add .ex1,eax
mov eax,.dey
imul ebx
add .ey1,eax
@@:
cmp .x2,SIZE_X
jl @f
mov .x2,SIZE_X
@@:
mov eax,SIZE_X ;calc memory begin in buffers
mov ebx,.y
mul ebx
mov ebx,.x1
add eax,ebx
mov ebx,eax
lea eax,[eax*3]
add edi,eax ; edi - screen
mov esi,.z_buff ; z-buffer filled with dd variables
shl ebx,2
add esi,ebx ; esi - Z buffer
mov ecx,.x2
sub ecx,.x1
; init current variables
push .bx1 .by1 .ex1 .ey1 .z1 esi
; push .by1
; push .ex1
; push .ey1
; push .z1 ; current z shl CATMULL_SHIFT
; push esi
if Ext >= MMX
pxor mm0,mm0
movq mm3,.ceyq
movq mm4,.cbyq
; movq mm5,mm3
; movq mm6,mm4
; psrad mm5,ROUND
; psrad mm6,ROUND
; movq .ceyq,mm5
; movq .cbyq,mm6
mov edx,.czbuff
else
cld
end if
.draw:
; if TEX = SHIFTING ;bump drawing only in shifting mode
if Ext=NON
mov esi,.czbuff ; .czbuff current address in buffer
mov ebx,.cz ; .cz - cur z position
cmp ebx,dword[esi]
else
mov ebx,.cz
cmp ebx,dword[edx]
end if
jge .skip
;if Ext=NON
mov eax,.cby
mov esi,.cbx
sar eax,ROUND
sar esi,ROUND
;else
; movd eax,mm6
; psrlq mm6,32
; movd esi,mm6
;end if
shl eax,TEX_SHIFT ;-
add esi,eax
lea esi,[esi*3] ;- ; esi - current b. texture addres
add esi,.bmap
;if Ext=NON
mov ebx,.cex ;.cex - current env map X
mov eax,.cey ;.cey - current env map y
sar ebx,ROUND
sar eax,ROUND
;else
; movd eax,mm5
; psrlq mm5,32
; movd ebx,mm5
;end if
shl eax,TEX_SHIFT
add ebx,eax
lea ebx,[ebx*3]
add ebx,.emap
if Ext>=MMX
movd mm1,[esi]
movd mm2,[ebx]
punpcklbw mm1,mm0
punpcklbw mm2,mm0
pmullw mm1,mm2
psrlw mm1,8
packuswb mm1,mm0
movd [edi],mm1
mov ebx,.cz
mov dword[edx],ebx
else
cld ; esi - tex e.
lodsb ; ebx - tex b.
mov dl,[ebx]
mul dl
shr ax,8
stosb
inc ebx
lodsb
mov dl,[ebx]
mul dl
shr ax,8
stosb
inc ebx
lodsb
mov dl,[ebx]
mul dl
shr ax,8
stosb
mov ebx,.cz
mov esi,.czbuff
mov dword[esi],ebx
jmp .no_skip
end if
.skip:
add edi,3
if Ext = NON
.no_skip:
add .czbuff,4
mov eax,.dbx
add .cbx,eax
mov eax,.dby
add .cby,eax
mov eax,.dex
add .cex,eax
mov eax,.dey
add .cey,eax
else
add edx,4
paddd mm3,.deyq
paddd mm4,.dbyq
; movq mm5,mm3
; movq mm6,mm4
; psrad mm5,ROUND
; psrad mm6,ROUND
movq .ceyq,mm3
movq .cbyq,mm4
end if
mov eax,.dz
add .cz,eax
if Ext = NON
dec ecx
jnz .draw
else
loop .draw
end if
.bl_end:
mov esp,ebp
ret 56