644 lines
12 KiB
Plaintext
644 lines
12 KiB
Plaintext
;-procedure draws smooth shaded lines (I mean interpolation 24 bit--
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;-color), with z coord interpolation--------------------------------
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;-author: Maciej Guba (www.macgub.hekko.pl)-------------------------
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;-in : -------------------------------------------------------------
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;----- edi - pointer to screen buffer ------------------------------
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;----- esi - pointer to Z buffer -----------------------------------
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;------ constans : SIZE_X, SIZE_Y - screen width and height---------
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;----------------- ROUND - fixed point shift------------------------
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;------ other parameters via stack----------------------------------
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smooth_line:
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.x1 equ ebp+4
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.y1 equ ebp+6
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.z1 equ ebp+8
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.r1 equ ebp+10
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.g1 equ ebp+12
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.b1 equ ebp+14
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.x2 equ ebp+16
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.y2 equ ebp+18
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.z2 equ ebp+20
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.r2 equ ebp+22
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.g2 equ ebp+24
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.b2 equ ebp+26
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.line_lenght equ ebp-2
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.delta equ ebp-6
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.delta_x equ ebp-10
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.delta_y equ ebp-14
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.dr equ ebp-18
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.dg equ ebp-22
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.db equ ebp-26
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.dz equ ebp-30
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.cr equ ebp-34
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.cg equ ebp-38
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.cb equ ebp-42
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.cz equ ebp-46
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;.line_lenght equ ebp-48
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.screen equ ebp-52
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.zbuffer equ ebp-56
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.ccoord equ ebp-60 ;current coordinate
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.czbuf equ ebp-64
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.cscr equ ebp-68
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.xres equ ebp-72
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.yres equ ebp-76
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.xresm1 equ ebp-80
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.yresm1 equ ebp-84
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.xresp1 equ ebp-88
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.yresp1 equ ebp-92
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.xres3 equ ebp-96
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.xres4 equ ebp-100
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macro .update_cur_var
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{
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if Ext=NON
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mov ebx,[.dz]
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add [.cz],ebx
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mov ebx,[.dr]
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add [.cr],ebx
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mov ebx,[.dg]
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add [.cg],ebx
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mov ebx,[.db]
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add [.cb],ebx
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elseif Ext=MMX
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movq mm0,[.cz]
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movq mm1,[.cg]
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paddd mm0,mm2 ;[.dz]
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paddd mm1,mm3 ;[.dg]
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movq [.cz],mm0
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movq [.cg],mm1
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elseif Ext >= SSE2
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; movups xmm1,[.cz]
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paddd xmm1,xmm0
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; movups [.cz],xmm1
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end if
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}
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macro .draw_pixel
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{
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mov [esi],ebx ; actualize Z buffer
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if Ext>=SSE2
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movaps xmm7,xmm1 ;[.cb] ;;xmm1
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shufps xmm7,xmm7,00111001b
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psrld xmm7,ROUND
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packssdw xmm7,xmm7
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packuswb xmm7,xmm7
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pand xmm7,xmm6 ;[.mask]
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movd [edi],xmm7
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else
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mov eax,[.cb]
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sar eax,ROUND
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mov [edi],al
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; and eax,0x000000ff ; clean unused bits
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mov ebx,[.cg]
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sar ebx,ROUND
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mov [edi+1],bl
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; mov ah,bl
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mov edx,[.cr]
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sar edx,ROUND
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mov [edi+2],dl
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end if
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; shl ebx,16
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; or eax,ebx
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; mov [edi],eax
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}
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macro .sort
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{
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if Ext >= MMX
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movq mm0,[.x1]
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movq mm1,[.x2]
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movq [.x1],mm1
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movq [.x2],mm0
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else
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mov edx,[.x1]
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xchg edx,[.x2]
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mov [.x1],edx
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mov edx,[.z1]
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xchg edx,[.z2]
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mov [.z1],edx
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end if
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mov edx,[.g1]
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xchg edx,[.g2]
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mov [.g1],edx
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}
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emms
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mov ebp,esp
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sub esp,128
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mov eax,[.x1] ; check if parameters exceedes screen area
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mov ebx,[.x2]
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or eax,ebx
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test eax,80008000h
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jne .end_line
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movzx edx,word [size_x_var]
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mov [.xres],edx
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dec edx
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movzx ecx,word [size_y_var]
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mov [.yres],ecx
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dec ecx
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cmp word[.x1],dx ;SIZE_X
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jg .end_line
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cmp word[.x2],dx ;SIZE_X
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jg .end_line
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cmp word[.y1],cx ;SIZE_Y
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jg .end_line
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cmp word[.y2],cx ;SIZE_Y
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jg .end_line
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mov edx,[.xres]
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shl edx,2
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mov [.xres4],edx
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shr edx,2
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lea edx,[edx*3]
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mov [.xres3],edx
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mov edx,[.xres]
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mov ecx,[.yres]
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dec edx
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dec ecx
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mov [.xresm1],edx
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mov [.yresm1],ecx
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add edx,2
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add ecx,2
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mov [.xresp1],edx
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mov [.yresp1],ecx
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mov [.screen],edi
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mov cx,[.x1]
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cmp cx,[.x2]
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je .vertical_l
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mov cx,[.y1]
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cmp cx,[.y2]
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je .horizontal_l
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mov ax,[.x1]
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sub ax,[.x2]
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cmp ax,0
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jg @f
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neg ax ; calc absolute value
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@@:
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mov [.delta_x],ax
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mov bx,[.y1]
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sub bx,[.y2]
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cmp bx,0
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jg @f
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neg bx
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@@:
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mov [.delta_y],bx
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cmp ax,bx
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je .deg45_l
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jl .more_vertical_l
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jg .more_horizon_l
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jmp .end_line
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;
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.horizontal_l:
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mov ax,[.x1]
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mov bx,[.x2]
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cmp bx,ax
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jge @f
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.sort
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@@:
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mov bx,[.x2]
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sub bx,[.x1]
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movsx ebx,bx
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cmp ebx,0 ;line lenght equql 0
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je .end_line
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mov [.delta_x],ebx
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call .calc_delta
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mov eax,[.xres] ;SIZE_X
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movsx ebx,word[.y1]
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mul ebx
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add esi,eax
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lea eax,[eax*3]
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add esi,eax
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add edi,eax
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movsx eax,word[.x1]
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add esi,eax
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lea eax,[eax*3]
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add edi,eax
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add esi,eax
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mov ecx,[.delta_x]
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movsx ebx,word[.r1]
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shl ebx,ROUND
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mov [.cr],ebx
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movsx ebx,word[.g1]
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shl ebx,ROUND
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mov [.cg],ebx
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movsx ebx,word[.b1]
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shl ebx,ROUND
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mov [.cb],ebx
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movsx ebx,word[.z1]
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shl ebx,ROUND
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mov [.cz],ebx
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if Ext = SSE2
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movups xmm1,[.cz]
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end if
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.hdraw:
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if Ext = SSE2
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movd ebx,xmm1
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else
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mov ebx,[.cz]
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end if
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cmp [esi],ebx
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jle .skip
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.draw_pixel
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.skip:
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add edi,3
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add esi,4
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.update_cur_var
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loop .hdraw
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jmp .end_line
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.vertical_l:
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mov ax,[.y1]
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cmp [.y2],ax
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jge @f
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.sort
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@@:
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mov bx,[.y2]
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sub bx,[.y1]
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movsx ebx,bx
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cmp ebx,0
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je .end_line
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mov [.delta_y],ebx
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call .calc_delta
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mov eax,[.xres] ;SIZE_X
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movsx ebx,word[.y1]
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mul ebx
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add esi,eax
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lea eax,[eax*3]
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add edi,eax
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add esi,eax
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movsx eax,word[.x1]
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add esi,eax
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lea eax,[eax*3]
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add esi,eax
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add edi,eax
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mov ecx,[.delta_y]
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movsx ebx,word[.r1]
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shl ebx,ROUND
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mov [.cr],ebx
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movsx ebx,word[.g1]
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shl ebx,ROUND
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mov [.cg],ebx
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movsx ebx,word[.b1]
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shl ebx,ROUND
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mov [.cb],ebx
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movsx ebx,word[.z1]
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shl ebx,ROUND
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mov [.cz],ebx
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if Ext = SSE2
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movups xmm1,[.cz]
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end if
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.v_draw:
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if Ext = SSE2
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movd ebx,xmm1
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else
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mov ebx,[.cz]
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end if
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cmp [esi],ebx
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jle @f
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.draw_pixel
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@@:
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add edi,[.xres3]
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add esi,[.xres4]
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.update_cur_var
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loop .v_draw
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jmp .end_line
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.deg45_l:
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mov word[.line_lenght],ax
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mov ax,[.x1]
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cmp [.x2],ax
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jge @f
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.sort
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@@:
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mov bx,[.y2]
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sub bx,[.y1]
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movsx ebx,bx
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cmp ebx,0
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je .end_line
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mov [.delta_y],ebx
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mov bx,[.x2]
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sub bx,[.x1]
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movsx ebx,bx
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mov [.delta_x],ebx
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call .calc_delta
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mov eax,[.xres]
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movsx ebx,word[.y1] ;calc begin values in screen and Z buffers
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mul ebx
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lea ebx,[3*eax]
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add edi,ebx
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shl eax,2
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add esi,eax
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movsx eax,word[.x1]
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lea ebx,[eax*3]
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add edi,ebx
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shl eax,2
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add esi,eax
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movzx ecx,word[.line_lenght]
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movsx ebx,word[.r1]
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shl ebx,ROUND
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mov [.cr],ebx
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movsx ebx,word[.g1]
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shl ebx,ROUND
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mov [.cg],ebx
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movsx ebx,word[.b1]
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shl ebx,ROUND
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mov [.cb],ebx
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movsx ebx,word[.z1]
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shl ebx,ROUND
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mov [.cz],ebx
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.d45_draw:
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if Ext = SSE2
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movd ebx,xmm1
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else
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mov ebx,[.cz]
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end if
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cmp [esi],ebx
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jle @f
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.draw_pixel
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@@:
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cmp dword[.delta_y],0
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jl @f
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add edi,[.xres3] ;SIZE_X*3+3
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add edi,3
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add esi,[.xres4] ;SIZE_X*4+4
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add esi,4
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jmp .d45_1
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@@:
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sub edi,[.xres3] ;(SIZE_X*3)-3
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sub edi,3
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sub esi,[.xres4] ;(SIZE_X*4)-4
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sub esi,4
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.d45_1:
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.update_cur_var
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loop .d45_draw
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jmp .end_line
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.more_vertical_l:
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mov word[.line_lenght],bx
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mov ax,[.y1]
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cmp [.y2],ax
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jge @f
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.sort
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@@:
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mov bx,[.y2]
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sub bx,[.y1]
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movsx ebx,bx
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cmp ebx,0
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je .end_line ;=======================
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mov [.delta_y],ebx
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mov ax,[.x2]
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sub ax,[.x1]
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cwde
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shl eax,ROUND
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cdq
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idiv ebx
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mov [.delta],eax
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call .calc_delta
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mov eax,[.xres] ;SIZE_X
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movsx ebx,word[.y1] ;calc begin values in screen and Z buffers
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mul ebx
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lea ebx,[3*eax]
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add esi,ebx
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add esi,eax
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add edi,ebx
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mov [.cscr],edi
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mov [.czbuf],esi
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movzx ecx,word[.line_lenght]
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movsx ebx,word[.r1]
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shl ebx,ROUND
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mov [.cr],ebx
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movsx ebx,word[.g1]
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shl ebx,ROUND
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mov [.cg],ebx
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movsx ebx,word[.b1]
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shl ebx,ROUND
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mov [.cb],ebx
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movsx ebx,word[.z1]
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shl ebx,ROUND
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mov [.cz],ebx
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if Ext = SSE2
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movups xmm1,[.cz]
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end if
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movsx ebx,word[.x1]
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shl ebx,ROUND
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mov [.ccoord],ebx ; .ccoord -> x coordinate
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.draw_m_v:
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mov edi,[.cscr]
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mov esi,[.czbuf]
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mov eax,[.ccoord]
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sar eax,ROUND
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lea ebx,[eax*3]
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add edi,ebx
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add esi,ebx
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add esi,eax
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if Ext = SSE2
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movd ebx,xmm1
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else
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mov ebx,[.cz]
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end if
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cmp [esi],ebx
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jle @f
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.draw_pixel
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@@:
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mov eax,[.delta]
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mov ebx,[.xres3]
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add [.ccoord],eax
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mov eax,[.xres4]
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add dword[.cscr],ebx ;SIZE_X*3 ;
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add dword[.czbuf],eax ;SIZE_X*4
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.d_m_v1:
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.update_cur_var
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dec ecx
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jnz .draw_m_v
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jmp .end_line
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.more_horizon_l:
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mov word[.line_lenght],ax
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mov ax,[.x1]
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cmp [.x2],ax
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jge @f
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.sort
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@@:
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mov bx,[.x2]
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sub bx,[.x1]
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movsx ebx,bx
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cmp ebx,0;=======================
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je .end_line
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mov [.delta_x],ebx
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mov ax,[.y2]
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sub ax,[.y1]
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cwde
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shl eax,ROUND
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cdq
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idiv ebx
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mov [.delta],eax
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call .calc_delta
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;calc begin values in screen and Z buffers
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movsx ebx,word[.x1]
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mov eax,ebx
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add esi,ebx
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lea ebx,[3*ebx]
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add esi,ebx
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add edi,ebx
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mov [.cscr],edi
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mov [.czbuf],esi
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movzx ecx,word[.line_lenght]
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movsx ebx,word[.r1]
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shl ebx,ROUND
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mov [.cr],ebx
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movsx ebx,word[.g1]
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shl ebx,ROUND
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mov [.cg],ebx
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movsx ebx,word[.b1]
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shl ebx,ROUND
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mov [.cb],ebx
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movsx ebx,word[.z1]
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shl ebx,ROUND
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mov [.cz],ebx
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if Ext = SSE2
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movups xmm1,[.cz]
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end if
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movsx ebx,word[.y1]
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shl ebx,ROUND
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mov [.ccoord],ebx ; .ccoord -> y coordinate
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.draw_m_h:
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mov edi,[.cscr]
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mov esi,[.czbuf]
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mov eax,[.ccoord] ; ccoord - cur y coordinate
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sar eax,ROUND
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mov ebx,[.xres] ;SIZE_X
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mul ebx
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add esi,eax
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lea eax,[eax*3]
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add esi,eax
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add edi,eax
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if Ext = SSE2
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movd ebx,xmm1
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else
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mov ebx,[.cz]
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end if
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cmp [esi],ebx
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jle @f
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.draw_pixel
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@@:
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mov eax,[.delta]
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add [.ccoord],eax
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add dword[.cscr],3 ;
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add dword[.czbuf],4
|
|
|
|
.update_cur_var
|
|
|
|
dec ecx
|
|
jnz .draw_m_h
|
|
|
|
.end_line:
|
|
mov esp,ebp
|
|
ret 24
|
|
|
|
.calc_delta:
|
|
mov ax,[.z2]
|
|
sub ax,[.z1]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
mov [.dz],eax
|
|
|
|
mov ax,[.r2]
|
|
sub ax,[.r1]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
mov [.dr],eax
|
|
|
|
mov ax,[.g2]
|
|
sub ax,[.g1]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
mov [.dg],eax
|
|
|
|
mov ax,[.b2]
|
|
sub ax,[.b1]
|
|
cwde
|
|
shl eax,ROUND
|
|
cdq
|
|
idiv ebx
|
|
mov [.db],eax
|
|
if Ext=MMX | Ext = SSE
|
|
movq mm2,[.dz]
|
|
movq mm3,[.dg]
|
|
else if Ext >= SSE2
|
|
movups xmm0,[.dz]
|
|
movups xmm6,[.mask]
|
|
end if
|
|
ret
|
|
.mask:
|
|
dq 0xffffffff00ffffff
|
|
dq 0xffffffffffffffff
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
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|