mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-23 23:26:49 +03:00
705 lines
14 KiB
Plaintext
705 lines
14 KiB
Plaintext
ROUND equ 8
|
|
CATMULL_SHIFT equ 8
|
|
gouraud_triangle_z:
|
|
|
|
;----procedure drawing gouraud triangle with z coordinate
|
|
;----interpolation ( Catmull alghoritm )-----------------
|
|
;------------------in - eax - x1 shl 16 + y1 ------------
|
|
;---------------------- ebx - x2 shl 16 + y2 ------------
|
|
;---------------------- ecx - x3 shl 16 + y3 ------------
|
|
;---------------------- esi - pointer to Z-buffer--------
|
|
;---------------------- Z-buffer filled with dd variables
|
|
;---------------------- shifted CATMULL_SHIFT------------
|
|
;---------------------- edi - pointer to screen buffer---
|
|
;---------------------- stack : colors-------------------
|
|
;----------------- procedure don't save registers !!-----
|
|
.col1r equ ebp+4 ; each color as word
|
|
.col1g equ ebp+6 ; each z coordinate as word
|
|
.col1b equ ebp+8
|
|
.z1 equ ebp+10
|
|
.col2r equ ebp+12
|
|
.col2g equ ebp+14
|
|
.col2b equ ebp+16
|
|
.z2 equ ebp+18
|
|
.col3r equ ebp+20
|
|
.col3g equ ebp+22
|
|
.col3b equ ebp+24
|
|
.z3 equ ebp+26
|
|
|
|
.x1 equ word[ebp-2]
|
|
.y1 equ word[ebp-4]
|
|
.x2 equ word[ebp-6]
|
|
.y2 equ word[ebp-8]
|
|
.x3 equ word[ebp-10]
|
|
.y3 equ word[ebp-12]
|
|
|
|
.dx12 equ dword[ebp-16]
|
|
.dz12 equ dword[ebp-20]
|
|
.dc12r equ dword[ebp-24]
|
|
.dc12g equ dword[ebp-28]
|
|
.dc12b equ dword[ebp-32]
|
|
|
|
.dx13 equ dword[ebp-36]
|
|
.dz13 equ dword[ebp-40]
|
|
.dc13r equ dword[ebp-44]
|
|
.dc13g equ dword[ebp-48]
|
|
.dc13b equ dword[ebp-52]
|
|
|
|
.dx23 equ dword[ebp-56]
|
|
.dz23 equ dword[ebp-60]
|
|
.dc23r equ dword[ebp-64]
|
|
.dc23g equ dword[ebp-68]
|
|
.dc23b equ dword[ebp-72]
|
|
|
|
.zz1 equ dword[ebp-76]
|
|
.c1r equ dword[ebp-80]
|
|
.c1g equ dword[ebp-84]
|
|
.c1b equ dword[ebp-88]
|
|
.zz2 equ dword[ebp-92]
|
|
.c2r equ dword[ebp-96]
|
|
.c2g equ dword[ebp-100]
|
|
.c2b equ dword[ebp-104]
|
|
;.zz1 equ dword[ebp-100]
|
|
;.zz2 equ dword[ebp-104]
|
|
|
|
.c1bM equ [ebp-88]
|
|
.c2bM equ [ebp-104]
|
|
.c1rM equ [ebp-80]
|
|
.c2rM equ [ebp-96]
|
|
.dc23bM equ [ebp-72]
|
|
.dc13bM equ [ebp-52]
|
|
.dc12bM equ [ebp-32]
|
|
.dc12rM equ [ebp-24]
|
|
.dc13rM equ [ebp-44]
|
|
.dc23rM equ [ebp-64]
|
|
if Ext=MMX
|
|
emms
|
|
end if
|
|
|
|
mov ebp,esp
|
|
; sub esp,84
|
|
.sort3: ; sort triangle coordinates...
|
|
cmp ax,bx
|
|
jle .sort1
|
|
xchg eax,ebx
|
|
mov edx,dword[.col1r]
|
|
xchg edx,dword[.col2r]
|
|
mov dword[.col1r],edx
|
|
mov edx,dword[.col1b]
|
|
xchg edx,dword[.col2b]
|
|
mov dword[.col1b],edx
|
|
.sort1:
|
|
cmp bx,cx
|
|
jle .sort2
|
|
xchg ebx,ecx
|
|
mov edx,dword[.col2r]
|
|
xchg edx,dword[.col3r]
|
|
mov dword[.col2r],edx
|
|
mov edx,dword[.col2b]
|
|
xchg edx,dword[.col3b]
|
|
mov dword[.col2b],edx
|
|
jmp .sort3
|
|
.sort2:
|
|
push eax ; store 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 .gt_loop2_end
|
|
|
|
mov bx,.y2 ; calc deltas
|
|
sub bx,.y1
|
|
jnz .gt_dx12_make
|
|
; mov .dx12,0
|
|
; mov .dz12,0
|
|
; mov .dc12r,0
|
|
; mov .dc12g,0
|
|
; mov .dc12b,0
|
|
mov ecx,5
|
|
@@:
|
|
push dword 0
|
|
loop @b
|
|
jmp .gt_dx12_done
|
|
.gt_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[.z2]
|
|
sub ax,word[.z1]
|
|
cwde
|
|
shl eax,CATMULL_SHIFT
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov ax,word[.col2r]
|
|
sub ax,word[.col1r]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc12r,eax
|
|
push eax
|
|
mov ax,word[.col2g]
|
|
sub ax,word[.col1g]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc12g,eax
|
|
push eax
|
|
mov ax,word[.col2b] ;;---
|
|
sub ax,word[.col1b]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc12b,eax
|
|
push eax
|
|
.gt_dx12_done:
|
|
|
|
mov bx,.y3 ; calc deltas
|
|
sub bx,.y1
|
|
jnz .gt_dx13_make
|
|
; mov .dx13,0
|
|
; mov .dz13,0
|
|
; mov .dc13r,0
|
|
; mov .dc13g,0
|
|
; mov .dc13b,0
|
|
mov ecx,5
|
|
@@:
|
|
push dword 0
|
|
loop @b
|
|
jmp .gt_dx13_done
|
|
.gt_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[.z3]
|
|
sub ax,word[.z1]
|
|
cwde
|
|
shl eax,CATMULL_SHIFT
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov ax,word[.col3r]
|
|
sub ax,word[.col1r]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc13r,eax
|
|
push eax
|
|
mov ax,word[.col3g]
|
|
sub ax,word[.col1g]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc13g,eax
|
|
push eax
|
|
mov ax,word[.col3b]
|
|
sub ax,word[.col1b]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc13b,eax
|
|
push eax
|
|
.gt_dx13_done:
|
|
|
|
mov bx,.y3 ; calc deltas
|
|
sub bx,.y2
|
|
jnz .gt_dx23_make
|
|
; mov .dx23,0
|
|
; mov .dz23,0
|
|
; mov .dc23r,0
|
|
; mov .dc23g,0
|
|
; mov .dc23b,0
|
|
mov ecx,5
|
|
@@:
|
|
push dword 0
|
|
loop @b
|
|
jmp .gt_dx23_done
|
|
.gt_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[.z3]
|
|
sub ax,word[.z2]
|
|
cwde
|
|
shl eax,CATMULL_SHIFT
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov ax,word[.col3r]
|
|
sub ax,word[.col2r]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc23r,eax
|
|
push eax
|
|
mov ax,word[.col3g]
|
|
sub ax,word[.col2g]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc23g,eax
|
|
push eax
|
|
mov ax,word[.col3b]
|
|
sub ax,word[.col2b]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
; mov .dc23b,eax
|
|
push eax
|
|
.gt_dx23_done:
|
|
sub esp,32
|
|
|
|
movsx eax,.x1 ; eax - cur x1
|
|
shl eax,ROUND ; ebx - cur x2
|
|
mov ebx,eax
|
|
movsx edx,word[.z1]
|
|
shl edx,CATMULL_SHIFT
|
|
mov .zz1,edx
|
|
mov .zz2,edx
|
|
movzx edx,word[.col1r]
|
|
shl edx,ROUND
|
|
mov .c1r,edx
|
|
mov .c2r,edx
|
|
movzx edx,word[.col1g]
|
|
shl edx,ROUND
|
|
mov .c1g,edx
|
|
mov .c2g,edx
|
|
movzx edx,word[.col1b]
|
|
shl edx,ROUND
|
|
mov .c1b,edx
|
|
mov .c2b,edx
|
|
mov cx,.y1
|
|
cmp cx,.y2
|
|
jge .gt_loop1_end
|
|
|
|
.gt_loop1:
|
|
pushad
|
|
; macro .debug
|
|
|
|
mov edx,.c2r ; c2r,c2g,c2b,c1r,c1g,c1b - current colors
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c2g
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c2b
|
|
sar edx,ROUND
|
|
push dx
|
|
sar ebx,ROUND ; x2
|
|
push bx
|
|
mov edx,.c1r
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c1g
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c1b
|
|
sar edx,ROUND
|
|
push dx
|
|
sar eax,ROUND
|
|
push ax ; x1
|
|
push cx ; y
|
|
push .zz2
|
|
push .zz1
|
|
call gouraud_line_z
|
|
|
|
popad
|
|
if Ext >= MMX
|
|
movq mm0,.c1bM
|
|
paddd mm0,qword .dc13bM
|
|
movq .c1bM,mm0
|
|
movq mm1,.c2bM
|
|
paddd mm1,qword .dc12bM
|
|
movq .c2bM,mm1
|
|
|
|
movq mm0,.c1rM
|
|
paddd mm0,qword .dc13rM
|
|
movq .c1rM,mm0
|
|
movq mm1,.c2rM
|
|
paddd mm1,qword .dc12rM
|
|
movq .c2rM,mm1
|
|
else
|
|
mov edx,.dc13r
|
|
add .c1r,edx
|
|
mov edx,.dc13g
|
|
add .c1g,edx
|
|
mov edx,.dc13b
|
|
add .c1b,edx
|
|
mov edx,.dc12r
|
|
add .c2r,edx
|
|
mov edx,.dc12g
|
|
add .c2g,edx
|
|
mov edx,.dc12b
|
|
add .c2b,edx
|
|
|
|
mov edx,.dz13
|
|
add .zz1,edx
|
|
mov edx,.dz12
|
|
add .zz2,edx
|
|
end if
|
|
add eax,.dx13
|
|
add ebx,.dx12
|
|
inc cx
|
|
cmp cx,.y2
|
|
jl .gt_loop1
|
|
|
|
.gt_loop1_end:
|
|
mov cx,.y2
|
|
cmp cx,.y3
|
|
jge .gt_loop2_end
|
|
|
|
movsx ebx,.x2 ; eax - cur x1
|
|
shl ebx,ROUND ; ebx - cur x2
|
|
movsx edx,word[.z2]
|
|
shl edx,CATMULL_SHIFT
|
|
mov .zz2,edx
|
|
movzx edx,word[.col2r]
|
|
shl edx,ROUND
|
|
mov .c2r,edx
|
|
movzx edx,word[.col2g]
|
|
shl edx,ROUND
|
|
mov .c2g,edx
|
|
movzx edx,word[.col2b]
|
|
shl edx,ROUND
|
|
mov .c2b,edx
|
|
|
|
.gt_loop2:
|
|
pushad
|
|
; macro .debug
|
|
|
|
mov edx,.c2r ; c2r,c2g,c2b,c1r,c1g,c1b - current colors
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c2g
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c2b
|
|
sar edx,ROUND
|
|
push dx
|
|
sar ebx,ROUND ; x2
|
|
push bx
|
|
mov edx,.c1r
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c1g
|
|
sar edx,ROUND
|
|
push dx
|
|
mov edx,.c1b
|
|
sar edx,ROUND
|
|
push dx
|
|
sar eax,ROUND
|
|
push ax ; x1
|
|
push cx ; y
|
|
push .zz2
|
|
push .zz1
|
|
call gouraud_line_z
|
|
|
|
popad
|
|
|
|
if Ext >= MMX
|
|
movq mm0,.c1bM
|
|
paddd mm0,qword .dc13bM
|
|
movq .c1bM,mm0
|
|
movq mm1,.c2bM
|
|
paddd mm1,qword .dc23bM
|
|
movq .c2bM,mm1
|
|
|
|
movq mm0,.c1rM
|
|
paddd mm0,qword .dc13rM
|
|
movq .c1rM,mm0
|
|
movq mm1,.c2rM
|
|
paddd mm1,qword .dc23rM
|
|
movq .c2rM,mm1
|
|
else
|
|
mov edx,.dc13r
|
|
add .c1r,edx
|
|
mov edx,.dc13g
|
|
add .c1g,edx
|
|
mov edx,.dc13b
|
|
add .c1b,edx
|
|
mov edx,.dc23r
|
|
add .c2r,edx
|
|
mov edx,.dc23g
|
|
add .c2g,edx
|
|
mov edx,.dc23b
|
|
add .c2b,edx
|
|
mov edx,.dz13
|
|
add .zz1,edx
|
|
mov edx,.dz23
|
|
add .zz2,edx
|
|
end if
|
|
add eax,.dx13
|
|
add ebx,.dx23
|
|
inc cx
|
|
cmp cx,.y3
|
|
jl .gt_loop2
|
|
.gt_loop2_end:
|
|
|
|
mov esp,ebp
|
|
ret 24
|
|
gouraud_line_z:
|
|
;----------------- procedure drawing gouraud line
|
|
;----------------- with z coordinate interpolation
|
|
;----------------- esi - pointer to Z_buffer
|
|
;----------------- edi - pointer to screen buffer
|
|
;----------------- stack:
|
|
.z1 equ dword[ebp+4] ; z coordiunate shifted left CATMULL_SHIFT
|
|
.z2 equ dword[ebp+8]
|
|
.y equ word[ebp+12]
|
|
.x1 equ ebp+14
|
|
.c1b equ ebp+16
|
|
.c1g equ ebp+18
|
|
.c1r equ ebp+20
|
|
.x2 equ ebp+22
|
|
.c2b equ ebp+24
|
|
.c2g equ ebp+26
|
|
.c2r equ ebp+28
|
|
|
|
.dz equ dword[ebp-4]
|
|
.dc_b equ dword[ebp-8]
|
|
.dc_g equ dword[ebp-12]
|
|
.dc_r equ dword[ebp-16]
|
|
.c_z equ dword[ebp-20]
|
|
.cb equ dword[ebp-24]
|
|
.cg equ dword[ebp-28]
|
|
.cr equ dword[ebp-32]
|
|
;.cg2 equ dword[ebp-36]
|
|
|
|
|
|
.crM equ ebp-32
|
|
.cgM equ ebp-28
|
|
.cbM equ ebp-24
|
|
|
|
.dc_rM equ ebp-16
|
|
.dc_gM equ ebp-12
|
|
.dc_bM equ ebp-8
|
|
mov ebp,esp
|
|
|
|
mov ax,.y
|
|
or ax,ax
|
|
jl .gl_quit
|
|
mov bx,[size_y_var]
|
|
dec bx
|
|
cmp ax,bx ;SIZE_Y
|
|
jge .gl_quit
|
|
|
|
mov eax,dword[.x1]
|
|
cmp ax,word[.x2]
|
|
je .gl_quit
|
|
jl @f
|
|
|
|
xchg eax,dword[.x2]
|
|
mov dword[.x1],eax
|
|
mov eax,dword[.c1g]
|
|
xchg eax,dword[.c2g]
|
|
mov dword[.c1g],eax
|
|
mov eax,.z1
|
|
xchg eax,.z2
|
|
mov .z1,eax
|
|
@@:
|
|
mov bx,[size_x_var]
|
|
dec bx
|
|
cmp word[.x1],bx ;SIZE_X
|
|
jge .gl_quit
|
|
cmp word[.x2],0
|
|
jle .gl_quit
|
|
|
|
mov eax,.z2
|
|
sub eax,.z1
|
|
cdq
|
|
mov bx,word[.x2] ; dz = z2-z1/x2-x1
|
|
sub bx,word[.x1]
|
|
movsx ebx,bx
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov ax,word[.c2b]
|
|
sub ax,word[.c1b]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov ax,word[.c2g]
|
|
sub ax,word[.c1g]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov ax,word[.c2r]
|
|
sub ax,word[.c1r]
|
|
cwde
|
|
shl eax,ROUND ; dc_r = c2r-c1r/x2-x1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
cmp word[.x1],0 ; clipping on function
|
|
jg @f
|
|
mov eax,.dz
|
|
movsx ebx,word[.x1]
|
|
neg ebx
|
|
imul ebx
|
|
add .z1,eax
|
|
mov word[.x1],0
|
|
|
|
mov eax,.dc_r
|
|
imul ebx
|
|
sar eax,ROUND
|
|
add word[.c1r],ax
|
|
|
|
mov eax,.dc_g
|
|
imul ebx
|
|
sar eax,ROUND
|
|
add word[.c1g],ax
|
|
|
|
mov eax,.dc_b
|
|
imul ebx
|
|
sar eax,ROUND
|
|
add word[.c1b],ax
|
|
|
|
@@:
|
|
mov bx,[size_x_var]
|
|
dec bx
|
|
cmp word[.x2],bx ;SIZE_X
|
|
jl @f
|
|
mov word[.x2],bx ;SIZE_X
|
|
@@:
|
|
sub esp,16 ; calculate memory begin
|
|
movzx edx,word[size_x_var] ;SIZE_X ; in buffers
|
|
movzx eax,.y
|
|
mul edx
|
|
movzx edx,word[.x1]
|
|
add eax,edx
|
|
push eax
|
|
lea eax,[eax*3]
|
|
add edi,eax
|
|
pop eax
|
|
shl eax,2
|
|
add esi,eax
|
|
|
|
mov cx,word[.x2]
|
|
sub cx,word[.x1]
|
|
movzx ecx,cx
|
|
mov ebx,.z1 ; ebx - currrent z shl CATMULL_SIFT
|
|
;if Ext >= SSE
|
|
; mov .cz,edx
|
|
;end if
|
|
mov edx,.dz ; edx - delta z
|
|
movzx eax,word[.c1r]
|
|
shl eax,ROUND
|
|
mov .cr,eax
|
|
movzx eax,word[.c1g]
|
|
shl eax,ROUND
|
|
mov .cg,eax
|
|
movzx eax,word[.c1b]
|
|
shl eax,ROUND
|
|
mov .cb,eax
|
|
if Ext = MMX
|
|
; mov .c_z,edx
|
|
movd mm2,[.dc_bM] ; delta color blue MMX
|
|
movd mm3,[.cbM] ; current blue MMX
|
|
movq mm5,[.dc_rM]
|
|
movq mm4,[.crM]
|
|
pxor mm6,mm6
|
|
end if
|
|
|
|
|
|
.ddraw:
|
|
;if Ext = MMX
|
|
; movq mm0,mm3
|
|
; psrsq mm0,32
|
|
; movd ebx,mm0
|
|
;end if
|
|
cmp ebx,dword[esi] ; esi - z_buffer
|
|
jge @f ; edi - Screen buffer
|
|
if Ext = MMX
|
|
movq mm0,mm3 ; mm0, mm1 - temp registers
|
|
psrld mm0,ROUND
|
|
movq mm1,mm4
|
|
psrld mm1,ROUND
|
|
packssdw mm1,mm0
|
|
packuswb mm1,mm6
|
|
; movd [edi],mm1
|
|
movd eax,mm1
|
|
stosw
|
|
shr eax,16
|
|
stosb
|
|
else
|
|
mov eax,.cr
|
|
sar eax,ROUND
|
|
stosb
|
|
mov eax,.cg
|
|
sar eax,ROUND
|
|
stosb
|
|
mov eax,.cb
|
|
sar eax,ROUND
|
|
stosb
|
|
end if
|
|
mov dword[esi],ebx
|
|
;if Ext = NON
|
|
jmp .no_skip
|
|
;end if
|
|
@@:
|
|
add edi,3
|
|
.no_skip:
|
|
add esi,4
|
|
;if Ext=NON
|
|
add ebx,edx
|
|
;end if
|
|
if Ext=MMX
|
|
paddd mm3,mm2
|
|
paddd mm4,mm5
|
|
else
|
|
mov eax,.dc_g
|
|
add .cg,eax
|
|
mov eax,.dc_b
|
|
add .cb,eax
|
|
mov eax,.dc_r
|
|
add .cr,eax
|
|
end if
|
|
loop .ddraw
|
|
|
|
.gl_quit:
|
|
mov esp,ebp
|
|
ret 26
|