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kolibrios/programs/demos/3dsheart/trunk/bump_cat.ASM

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NASM
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;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
;------- Big thanks to Majuma (www.majuma.xt.pl) for absolutely great---
;------- DOS 13h mode demos --------------------------------------------
;------- Procedure draws bump triangle using Catmull Z-buffer algorithm-
;------- (Z coordinate interpolation)-----------------------------------
bump_triangle_z:
;------------------in - eax - x1 shl 16 + y1 -----------
;---------------------- ebx - x2 shl 16 + y2 -----------
;---------------------- ecx - x3 shl 16 + y3 -----------
;---------------------- edx - pointer to bump map ------
;---------------------- esi - pointer to environment map
;---------------------- edi - pointer to screen buffer--
;---------------------- stack : bump coordinates--------
;---------------------- environment 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_x3 equ ebp+12
.b_y3 equ ebp+14
.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 bump map
.t_emap equ dword[ebp-8] ; pointer to e. map
.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]
.dex12 equ dword[ebp-36]
.dey12 equ dword[ebp-40]
.dz12 equ dword[ebp-44]
.dx13 equ dword[ebp-48]
.dbx13 equ dword[ebp-52]
.dby13 equ dword[ebp-56]
.dex13 equ dword[ebp-60]
.dey13 equ dword[ebp-64]
.dz13 equ dword[ebp-68]
.dx23 equ dword[ebp-72]
.dbx23 equ dword[ebp-76]
.dby23 equ dword[ebp-80]
.dex23 equ dword[ebp-84]
.dey23 equ dword[ebp-88]
.dz23 equ dword[ebp-92]
.cx1 equ dword[ebp-96] ; current variables
.cx2 equ dword[ebp-100]
.cbx1 equ dword[ebp-104]
.cbx2 equ dword[ebp-108]
.cby1 equ dword[ebp-112]
.cby2 equ dword[ebp-116]
.cex1 equ dword[ebp-120]
.cex2 equ dword[ebp-124]
.cey1 equ dword[ebp-128]
.cey2 equ dword[ebp-132]
.cz1 equ dword[ebp-136]
.cz2 equ dword[ebp-140]
mov ebp,esp
push edx ; 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 ; 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
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 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
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
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
; nop here bug ????!!!
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
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
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
push eax
movsx eax,word[.b_x1]
shl eax,ROUND
; mov .cbx1,eax
; mov .cbx2,eax
push eax
push eax
movsx eax,word[.b_y1]
shl eax,ROUND
; mov .cby1,eax
; mov .cby2,eax
push eax
push eax
movsx eax,word[.e_x1]
shl eax,ROUND
;mov .cex1,eax
;mov .cex2,eax
push eax
push eax
movsx eax,word[.e_y1]
shl eax,ROUND
;mov .cey1,eax
;mov .cey2,eax
push eax
push eax
movsx eax,.z1
shl eax,CATMULL_SHIFT
;mov .cz1,eax
;mov .cz2,eax
push eax
push eax
movsx ecx,.y1
cmp cx,.y2
jge .loop12_done
.loop12:
call .call_bump_line
mov eax,.dx13
add .cx1,eax
mov eax,.dx12
add .cx2,eax
mov eax,.dbx13
add .cbx1,eax
mov eax,.dbx12
add .cbx2,eax
mov eax,.dby13
add .cby1,eax
mov eax,.dby12
add .cby2,eax
mov eax,.dex13
add .cex1,eax
mov eax,.dex12
add .cex2,eax
mov eax,.dey13
add .cey1,eax
mov eax,.dey12
add .cey2,eax
mov eax,.dz13
add .cz1,eax
mov eax,.dz12
add .cz2,eax
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_bump_line
mov eax,.dx13
add .cx1,eax
mov eax,.dx23
add .cx2,eax
mov eax,.dbx13
add .cbx1,eax
mov eax,.dbx23
add .cbx2,eax
mov eax,.dby13
add .cby1,eax
mov eax,.dby23
add .cby2,eax
mov eax,.dex13
add .cex1,eax
mov eax,.dex23
add .cex2,eax
mov eax,.dey13
add .cey1,eax
mov eax,.dey23
add .cey2,eax
mov eax,.dz13
add .cz1,eax
mov eax,.dz23
add .cz2,eax
inc ecx
cmp cx,.y3
jl .loop23
.loop23_done:
mov esp,ebp
ret 34
.call_bump_line:
; push ebp
; push ecx
pushad
push .cz1
push .cz2
push .z_buff
push .t_emap
push .t_bmap
push .cey2
push .cex2
push .cey1
push .cex1
push .cby2
push .cbx2
push .cby1
push .cbx1
push ecx
mov eax,.cx1
sar eax,ROUND
mov ebx,.cx2
sar ebx,ROUND
call bump_line_z
popad
ret
bump_line_z:
;--------------in: eax - x1
;-------------- ebx - x2
;-------------- edi - pointer to screen buffer
;stack - another parameters :
.y equ dword [ebp+4]
.bx1 equ dword [ebp+8] ; ---
.by1 equ dword [ebp+12] ; |
.bx2 equ dword [ebp+16] ; |
.by2 equ dword [ebp+20] ; |> bump and env coords
.ex1 equ dword [ebp+24] ; |> shifted shl ROUND
.ey1 equ dword [ebp+28] ; |
.ex2 equ dword [ebp+32] ; |
.ey2 equ dword [ebp+36] ; ---
.bmap equ dword [ebp+40]
.emap equ dword [ebp+44]
.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]
.dex equ dword [ebp-20]
.dey equ dword [ebp-24]
.dz equ dword [ebp-28]
.cbx equ dword [ebp-32]
.cby equ dword [ebp-36]
.cex equ dword [ebp-40]
.cey equ dword [ebp-44]
.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 .bl_ok
je .bl_end
xchg eax,ebx
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
mov edx,.z1
xchg edx,.z2
mov .z1,edx
.bl_ok:
push eax
push ebx ;store x1, x2
cmp .x1,SIZE_X
jge .bl_end
cmp .x2,0
jle .bl_end
mov ebx,.x2
sub ebx,.x1
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
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
mov esi,.z_buff ; z-buffer filled with dd variables
shl ebx,2
add esi,ebx
mov ecx,.x2
sub ecx,.x1
; init current variables
push .bx1
push .by1
push .ex1
push .ey1
push .z1 ; current z shl CATMULL_SHIFT
push esi
.draw:
; if TEX = SHIFTING ;bump drawing only in shifting mode
mov esi,.czbuff ; .czbuff current address in buffer
mov ebx,.cz ; .cz - cur z position
cmp ebx,dword[esi]
jge .skip
mov eax,.cby
sar eax,ROUND
shl eax,TEX_SHIFT
mov esi,.cbx
sar esi,ROUND
add esi,eax
mov ebx,esi
dec ebx
and ebx,TEXTURE_SIZE
add ebx,.bmap
movzx eax,byte [ebx]
mov ebx,esi
inc ebx
and ebx,TEXTURE_SIZE
add ebx,.bmap
movzx ebx,byte [ebx]
sub eax,ebx
mov ebx,esi
sub ebx,TEX_X
and ebx,TEXTURE_SIZE
add ebx,.bmap
movzx edx,byte [ebx]
mov ebx,esi
add ebx,TEX_X
and ebx,TEXTURE_SIZE
add ebx,.bmap
movzx ebx,byte [ebx]
sub edx,ebx
mov ebx,.cex ;.cex - current env map X
sar ebx,ROUND
add eax,ebx ; eax - modified x coord
mov ebx,.cey ;.cey - current env map y
sar ebx,ROUND
add edx,ebx ; edx - modified y coord
or eax,eax
jl .black
cmp eax,TEX_X
jg .black
or edx,edx
jl .black
cmp edx,TEX_Y
jg .black
shl edx,TEX_SHIFT
add edx,eax
lea edx,[edx*3]
add edx,.emap
mov eax,dword[edx]
jmp .put_pixel
.black:
xor eax,eax
.put_pixel:
stosd
dec edi
mov ebx,.cz
mov esi,.czbuff
mov dword[esi],ebx
jmp .no_skip
.skip:
add edi,3
.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
mov eax,.dz
add .cz,eax
dec ecx
jnz .draw
; end if
.bl_end:
mov esp,ebp
ret 56