1017 lines
21 KiB
Plaintext
1017 lines
21 KiB
Plaintext
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CATMULL_SHIFT equ 8
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ROUND equ 8
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;NON=0
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;MMX=1
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;Ext=MMX
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;TEX_SIZE=0x3fff
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;SIZE_X equ 512
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;SIZE_Y equ 512
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;ROUND = 8
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;TEX_SHIFT equ 6
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; procedure drawing textured triangle with Gouraud shading
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; Z-buffer alghoritm included, Z coord interpolation ----
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; I set the color by this way -- (col1 * col2)/256 ------
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;------------------in - eax - x1 shl 16 + y1 ------------
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;---------------------- ebx - x2 shl 16 + y2 ------------
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;---------------------- ecx - x3 shl 16 + y3 ------------
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;---------------------- esi - pointer to Z-buffer--------
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;---------------------- edx - pointer to texture---------
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;---------------------- Z-buffer filled with dd variables
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;---------------------- shifted CATMULL_SHIFT------------
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;---------------------- edi - pointer to screen buffer---
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;---------------------- stack : colors-------------------
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tex_plus_grd_triangle:
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; parameters :
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.tex_y3 equ [ebp+38] ; 36 bytes through stack
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.tex_x3 equ [ebp+36]
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.tex_y2 equ [ebp+34]
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.tex_x2 equ [ebp+32]
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.tex_y1 equ [ebp+30]
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.tex_x1 equ [ebp+28]
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.z3 equ [ebp+26]
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.col3b equ [ebp+24]
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.col3g equ [ebp+22]
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.col3r equ [ebp+20]
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.z2 equ [ebp+18]
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.col2b equ [ebp+16]
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.col2g equ [ebp+14]
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.col2r equ [ebp+12]
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.z1 equ [ebp+10]
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.col1b equ [ebp+8]
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.col1g equ [ebp+6]
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.col1r equ [ebp+4]
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; local variables:
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.tex_ptr equ dword[ebp-4]
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.z_ptr equ dword[ebp-8]
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.scr_buff equ dword[ebp-12]
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.x1 equ word[ebp-14] ;dw ? ;equ word[ebp-10]
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.y1 equ word[ebp-16] ;dw ? ;equ word[ebp-12]
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.x2 equ word[ebp-18] ;dw ? ;equ word[ebp-14]
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.y2 equ word[ebp-20] ;dw ? ;equ word[ebp-16]
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.x3 equ word[ebp-22] ;dw ? ;equ word[ebp-18]
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.y3 equ word[ebp-24] ;dw ? ;equ word[ebp-20]
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.dx12 equ dword[ebp-28] ;dd ?
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.tex_dx12 equ dword[ebp-32] ;dd ?
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.tex_dy12 equ [ebp-36] ;dd ?
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.dz12 equ dword[ebp-40] ;dd ?
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.dc12r equ [ebp-44] ;dd ?
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.dc12g equ dword[ebp-48] ;dd ?
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.dc12b equ [ebp-52] ;dd ?
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.dx23 equ dword[ebp-56] ;dd ?
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.tex_dx23 equ dword[ebp-60] ;dd ?
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.tex_dy23 equ [ebp-64] ;dd ?
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.dz23 equ dword[ebp-68] ;dd ?
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.dc23r equ [ebp-72] ;dd ?
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.dc23g equ dword[ebp-76] ;dd ?
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.dc23b equ [ebp-80] ;dword[ebp-8]dd ?
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.dx13 equ dword[ebp-84] ;dd ?
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.tex_dx13 equ dword[ebp-88] ;dd ?
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.tex_dy13 equ [ebp-92] ;dd ?
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.dz13 equ dword[ebp-96] ;dd ?
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.dc13r equ [ebp-100] ;dd ?
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.dc13g equ dword[ebp-104] ;dd ?
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.dc13b equ [ebp-108] ;dd ?
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.scan_x1 equ dword[ebp-112] ;dd ?
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.scan_y1 equ [ebp-116] ;dd ?
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.zz1 equ dword[ebp-120] ;dw ?
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.cur1r equ [ebp-124] ;dw ?
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.cur1g equ dword[ebp-128] ;dw ?
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.cur1b equ [ebp-132] ;dw ?
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.scan_x2 equ dword[ebp-136] ;dd ?
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.scan_y2 equ [ebp-140] ;dd ?
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.zz2 equ dword[ebp-144] ;dw ?
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.cur2r equ [ebp-148] ;dw ?
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.cur2g equ dword[ebp-152] ;dw ?
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.cur2b equ [ebp-156] ;dw ?
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mov ebp,esp
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; mov .tex_ptr,edx
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; mov .z_ptr,esi
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; mov .scr_buff,edi
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push edx esi edi
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; push esi
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; push edi
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mov edx,80008000h ; eax,ebx,ecx are ANDd together into edx which means that
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and edx,ebx ; if *all* of them are negative a sign flag is raised
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and edx,ecx
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and edx,eax
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test edx,80008000h ; Check both X&Y at once
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jne .loop2_end
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.sort3:
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cmp ax,bx
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jle .sort1
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xchg eax,ebx
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if Ext>=MMX
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movq mm0, .col1r ; exchange r, g, b, z
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movq mm1, .col2r
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movq .col1r ,mm1
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movq .col2r ,mm0
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else
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mov edx,dword .col1r ; exchange both r and g
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xchg edx,dword .col2r
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mov dword .col1r ,edx
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mov edx,dword .col1b ; b and z
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xchg edx,dword .col2b
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mov dword .col1b ,edx
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end if
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mov edx,dword .tex_x1
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xchg edx,dword .tex_x2
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mov dword .tex_x1 ,edx
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.sort1:
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cmp bx,cx
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jle .sort2
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xchg ebx,ecx
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if Ext>=MMX
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movq mm0, .col2r ; exchange r, g, b, z
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movq mm1, .col3r
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movq .col3r ,mm0
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movq .col2r ,mm1
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else
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mov edx,dword .col2r ; r, g
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xchg edx,dword .col3r
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mov dword .col2r,edx
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mov edx,dword .col2b ; b, z
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xchg edx,dword .col3b
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mov dword .col2b,edx
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end if
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mov edx,dword .tex_x2
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xchg edx,dword .tex_x3
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mov dword .tex_x2,edx
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jmp .sort3
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.sort2:
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push eax ebx ecx ; store in variables
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; push ebx
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; push ecx
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;****************** delta computng zone **************
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;+++++++++ first zone
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mov bx,.y2 ; calc delta12
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sub bx,.y1
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jnz .dx12_make
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mov ecx,7
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@@:
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push dword 0
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loop @b
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jmp .dx12_done
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.dx12_make:
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mov ax,.x2
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sub ax,.x1
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cwde
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movsx ebx,bx
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shl eax,ROUND
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cdq
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idiv ebx
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; mov .dx12,eax
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push eax
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if 0 ; Ext=SSE
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movd mm0,.col1r ; 2 words r, g
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pxor mm1,mm1
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punpcklwd mm0,mm1
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cvtpi2ps xmm0,mm0
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movlhps xmm0,xmm0
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movd mm0,.col1g ; 2 words b, z
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punpcklwd mm0,mm1
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cvtpi2ps xmm0,mm0
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; xmm0=four float double words
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divss xmm0,.pack3
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;convert and insert mm0 to lower xmm1 ..
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end if
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mov ax,word .tex_x2
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sub ax,word .tex_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 .tex_dx12r,eax
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push eax
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mov ax,word .tex_y2
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sub ax,word .tex_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 .tex_dx12,eax
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push eax
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mov ax,word .z2
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sub ax,word .z1
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cwde
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shl eax,CATMULL_SHIFT
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cdq
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idiv ebx
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; mov .dz12,eax
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push eax ; .dza12
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mov ax,word .col2r
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sub ax,word .col1r
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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 .dc12r,eax
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push eax
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mov ax,word .col2g
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sub ax,word .col1g
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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 .dc12g,eax
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push eax
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mov ax,word .col2b ;;---
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sub ax,word .col1b
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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 .dc12b,eax
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push eax
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;+++++++++++++++++ second zone +++++++++++++
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.dx12_done:
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mov bx,.y3 ; calc delta23
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sub bx,.y2
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jnz .dx23_make
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mov ecx,7
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@@:
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push dword 0
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loop @b
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jmp .dx23_done
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.dx23_make:
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mov ax,.x3
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sub ax,.x2
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cwde
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movsx ebx,bx
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shl eax,ROUND
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cdq
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idiv ebx
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; mov .dx23,eax
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push eax
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mov ax,word .tex_x3
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sub ax,word .tex_x2
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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 .tex_dx23,eax
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push eax
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mov ax,word .tex_y3
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sub ax,word .tex_y2
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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 .tex_dy23,eax
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push eax
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mov ax,word .z3
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sub ax,word .z2
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cwde ;
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shl eax,CATMULL_SHIFT ; 2222222
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cdq ; 2 2
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idiv ebx ; 2
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; mov .dz23,eax ; 2
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push eax ; .dza12 ; 2
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; 2
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mov ax,word .col3r ; 2
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sub ax,word .col2r ; 2222222
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cwde ; second delta
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shl eax,ROUND ;
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cdq ;
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idiv ebx ;
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; mov .dc23r,eax ;
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push eax
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mov ax,word .col3g
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sub ax,word .col2g
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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 .dc23g,eax
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push eax
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mov ax,word .col3b ;;---
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sub ax,word .col2b
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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 .dc23b,eax
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push eax
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.dx23_done:
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;++++++++++++++++++third zone++++++++++++++++++++++++
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mov bx,.y3 ; calc delta13
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sub bx,.y1
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jnz .dx13_make
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mov ecx,7
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@@:
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push dword 0
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loop @b
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jmp .dx13_done
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.dx13_make:
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mov ax,.x3
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sub ax,.x1
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cwde
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movsx ebx,bx
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shl eax,ROUND
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cdq
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idiv ebx
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; mov .dx13,eax
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push eax
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mov ax,word .tex_x3 ; triangle b
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sub ax,word .tex_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 .tex_dx13r,eax
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push eax
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mov ax,word .tex_y3
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sub ax,word .tex_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 .tex_dy13,eax
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push eax
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mov ax,word .z3
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sub ax,word .z1 ; 333333333
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cwde ; 3 3
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shl eax,CATMULL_SHIFT ; 3
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cdq ; 3
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idiv ebx ; 3
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; mov .dz13,eax ; 3
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push eax ; .dza12 ; 3
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; 3
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mov ax,word .col3r ; 3333333333
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sub ax,word .col1r ; 3
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cwde ; 3
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shl eax,ROUND ; 3
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cdq ; 3
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idiv ebx ; 3
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; mov .dc13r,eax ; 3 3
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push eax ; 33333333
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mov ax,word .col3g
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sub ax,word .col1g
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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 .dc13g,eax
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push eax
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mov ax,word .col3b ;;---
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sub ax,word .col1b
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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 .dc13b,eax
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push eax
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.dx13_done:
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; <<<<<<< ::delta zone end+++++++++++++++++++++ >>>>>>>>
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sub esp,55 ;(12*4)
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movsx eax,.x1 ; eax - cur x1
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shl eax,ROUND ; ebx - cur x2
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mov ebx,eax
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movsx edx,word .z1
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shl edx,CATMULL_SHIFT
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mov .zz1,edx
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mov .zz2,edx
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movzx edi,word .col1r
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shl edi,ROUND
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mov .cur1r,edi
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mov .cur2r,edi
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movzx esi,word .col1g
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shl esi,ROUND
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mov .cur1g,esi
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mov .cur2g,esi
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movzx edx,word .col1b
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shl edx,ROUND
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mov .cur1b,edx
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mov .cur2b,edx
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movzx edi,word .tex_x1
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shl edi,ROUND
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mov .scan_x1,edi
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mov .scan_x2,edi
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movzx edx,word .tex_y1
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shl edx,ROUND
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mov .scan_y1,edx
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mov .scan_y2,edx
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mov cx,.y1
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cmp cx,.y2
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jge .loop1_end
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.loop_1:
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; push eax ebx ebp
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pushad
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push .tex_ptr
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push .scr_buff
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push .z_ptr
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push cx
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push .zz2
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push .scan_x2
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push dword .scan_y2
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push dword .cur2r
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push .cur2g
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push dword .cur2b
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push .zz1
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push .scan_x1
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push dword .scan_y1
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push dword .cur1r
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push .cur1g
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push dword .cur1b
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sar eax,ROUND
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sar ebx,ROUND
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call horizontal_tex_grd_line
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; pop ebp ebx eax
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popad
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if (Ext = MMX)|(Ext=SSE)
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movq mm0,.cur1b
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movq mm1,.cur1r
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movq mm2,.scan_y1
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movq mm3,.cur2b
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movq mm4,.cur2r
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movq mm5,.scan_y2
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paddd mm0,.dc13b
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paddd mm1,.dc13r
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paddd mm2,.tex_dy13
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paddd mm3,.dc12b
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paddd mm4,.dc12r
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paddd mm5,.tex_dy12
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movq .cur1b,mm0
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movq .cur1r,mm1
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movq .scan_y1,mm2
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movq .cur2b,mm3
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movq .cur2r,mm4
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movq .scan_y2,mm5
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end if
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if Ext >= SSE2
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movups xmm0,.cur1b
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movups xmm1,.dc13b
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movups xmm2,.cur2b
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movups xmm3,.dc12b
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movq mm2,.scan_y1
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movq mm5,.scan_y2
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paddd xmm0,xmm1
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paddd xmm2,xmm3
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paddd mm2,.tex_dy13
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paddd mm5,.tex_dy12
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movq .scan_y1,mm2
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movq .scan_y2,mm5
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movups .cur1b,xmm0
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movups .cur2b,xmm2
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end if
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if Ext = NON
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mov edx,.dc13b
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add .cur1b,edx
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mov esi,.dc13g
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add .cur1g,esi
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mov edi,.dc13r
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add .cur1r,edi
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mov edx,.dz13
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add .zz1,edx
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mov edx,.tex_dx13
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add .scan_x1,edx
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mov esi,.tex_dy13
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add .scan_y1,esi
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mov edi,.dc12b
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add .cur2b,edi
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mov esi,.dc12g
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add .cur2g,esi
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mov edx,.dc12r
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add .cur2r,edx
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mov edi,.tex_dx12
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add .scan_x2,edi
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mov esi,.tex_dy12
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add .scan_y2,esi
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mov edx,.dz12
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add .zz2,edx
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end if
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add eax,.dx13
|
|
add ebx,.dx12
|
|
inc cx
|
|
cmp cx,.y2
|
|
jl .loop_1
|
|
.loop1_end:
|
|
movzx ecx,.y2
|
|
cmp cx,.y3
|
|
jge .loop2_end
|
|
|
|
movsx ebx,.x2 ; eax - cur x1
|
|
shl ebx,ROUND ; ebx - cur x2
|
|
|
|
movsx edx,word .z2
|
|
shl edx,CATMULL_SHIFT
|
|
; mov .zz1,edx
|
|
mov .zz2,edx
|
|
|
|
movzx edi,word .col2r
|
|
shl edi,ROUND
|
|
; mov .cur1r,edi
|
|
mov .cur2r,edi
|
|
movzx esi,word .col2g
|
|
shl esi,ROUND
|
|
; mov .cur1g,esi
|
|
mov .cur2g,esi
|
|
movzx edx,word .col2b
|
|
shl edx,ROUND
|
|
; mov .cur1b,edx
|
|
mov .cur2b,edx
|
|
|
|
movzx edi,word .tex_x2
|
|
shl edi,ROUND
|
|
; mov .scan_x1,edi
|
|
mov .scan_x2,edi
|
|
movzx edx,word .tex_y2
|
|
shl edx,ROUND
|
|
; mov .scan_y1,edx
|
|
mov .scan_y2,edx
|
|
|
|
.loop_2:
|
|
pushad
|
|
|
|
push .tex_ptr
|
|
push .scr_buff
|
|
push .z_ptr
|
|
push cx
|
|
|
|
push .zz2
|
|
|
|
push .scan_x2
|
|
push dword .scan_y2
|
|
push dword .cur2r
|
|
push .cur2g
|
|
push dword .cur2b
|
|
|
|
push .zz1
|
|
|
|
push .scan_x1
|
|
push dword .scan_y1
|
|
push dword .cur1r
|
|
push .cur1g
|
|
push dword .cur1b
|
|
|
|
sar eax,ROUND
|
|
sar ebx,ROUND
|
|
call horizontal_tex_grd_line
|
|
|
|
popad
|
|
|
|
if (Ext = MMX)|(Ext=SSE)
|
|
movq mm0,.cur1b
|
|
movq mm1,.cur1r
|
|
movq mm2,.scan_y1
|
|
movq mm3,.cur2b
|
|
movq mm4,.cur2r
|
|
movq mm5,.scan_y2
|
|
paddd mm0,.dc13b
|
|
paddd mm1,.dc13r
|
|
paddd mm2,.tex_dy13
|
|
paddd mm3,.dc23b
|
|
paddd mm4,.dc23r
|
|
paddd mm5,.tex_dy23
|
|
movq .cur1b,mm0
|
|
movq .cur1r,mm1
|
|
movq .scan_y1,mm2
|
|
movq .cur2b,mm3
|
|
movq .cur2r,mm4
|
|
movq .scan_y2,mm5
|
|
end if
|
|
if Ext >= SSE2
|
|
movups xmm0,.cur1b
|
|
movups xmm1,.dc13b
|
|
movups xmm2,.cur2b
|
|
movups xmm3,.dc23b
|
|
movq mm2,.scan_y1
|
|
movq mm5,.scan_y2
|
|
paddd xmm0,xmm1
|
|
paddd xmm2,xmm3
|
|
paddd mm2,.tex_dy13
|
|
paddd mm5,.tex_dy23
|
|
movq .scan_y1,mm2
|
|
movq .scan_y2,mm5
|
|
movups .cur1b,xmm0
|
|
movups .cur2b,xmm2
|
|
end if
|
|
if Ext = NON
|
|
mov edx,.dc13b
|
|
add .cur1b,edx
|
|
mov esi,.dc13g
|
|
add .cur1g,esi
|
|
mov edi,.dc13r
|
|
add .cur1r,edi
|
|
mov edx,.tex_dx13
|
|
add .scan_x1,edx
|
|
mov esi,.tex_dy13
|
|
add .scan_y1,esi
|
|
mov edx,.dz13
|
|
add .zz1,edx
|
|
|
|
mov edi,.dc23b
|
|
add .cur2b,edi
|
|
mov esi,.dc23g
|
|
add .cur2g,esi
|
|
mov edx,.dc23r
|
|
add .cur2r,edx
|
|
mov edi,.tex_dx23
|
|
add .scan_x2,edi
|
|
mov esi,.tex_dy23
|
|
add .scan_y2,esi
|
|
mov edx,.dz23
|
|
add .zz2,edx
|
|
end if
|
|
add eax,.dx13
|
|
add ebx,.dx23
|
|
inc cx
|
|
cmp cx,.y3
|
|
jl .loop_2
|
|
|
|
.loop2_end:
|
|
mov esp,ebp
|
|
ret 36
|
|
horizontal_tex_grd_line:
|
|
;in:
|
|
; eax : x1, ebx : x2
|
|
|
|
.tex_ptr equ [ebp+62]
|
|
.screen equ [ebp+58]
|
|
.z_buffer equ [ebp+54]
|
|
.y equ [ebp+52]
|
|
|
|
.z2 equ [ebp+48]
|
|
.tex_x2 equ [ebp+44]
|
|
.tex_y2 equ [ebp+40]
|
|
.r2 equ [ebp+36]
|
|
.g2 equ [ebp+32]
|
|
.b2 equ [ebp+28]
|
|
|
|
.z1 equ [ebp+24]
|
|
.tex_x1 equ [ebp+20]
|
|
.tex_y1 equ [ebp+16]
|
|
.r1 equ [ebp+12]
|
|
.g1 equ [ebp+8]
|
|
.b1 equ [ebp+4]
|
|
|
|
.x1 equ word[ebp-2]
|
|
.x2 equ word[ebp-4]
|
|
.dz equ dword[ebp-8]
|
|
.db equ dword[ebp-12]
|
|
.dg equ dword[ebp-16]
|
|
.dr equ dword[ebp-20]
|
|
.dtex_x equ dword[ebp-24]
|
|
.dtex_y equ dword[ebp-28]
|
|
|
|
.c_ty equ [ebp-32]
|
|
.c_tx equ [ebp-36]
|
|
.cb equ [ebp-40]
|
|
.cg equ [ebp-44]
|
|
.cr equ [ebp-48]
|
|
.t_col equ [ebp-52]
|
|
|
|
.dtex_yM equ qword[ebp-28]
|
|
.drM equ qword[ebp-20]
|
|
.dbM equ qword[ebp-12]
|
|
|
|
mov ebp,esp
|
|
; sub esp,30
|
|
|
|
mov cx,word .y
|
|
or cx,cx
|
|
jl .quit_l
|
|
|
|
cmp cx,word[size_y_var] ;SIZE_Y
|
|
jge .quit_l
|
|
|
|
cmp ax,bx
|
|
je .quit_l
|
|
jl @f
|
|
|
|
xchg eax,ebx
|
|
|
|
if Ext=NON
|
|
mov ecx,dword .r1
|
|
xchg ecx, .r2
|
|
mov dword .r1, ecx
|
|
|
|
mov ecx,dword .g1
|
|
xchg ecx, .g2
|
|
mov dword .g1, ecx
|
|
|
|
mov ecx,dword .b1
|
|
xchg ecx, .b2
|
|
mov dword .b1, ecx
|
|
|
|
mov ecx,dword .tex_x1
|
|
xchg ecx, .tex_x2
|
|
mov dword .tex_x1, ecx
|
|
|
|
mov ecx,dword .tex_y1
|
|
xchg ecx, .tex_y2
|
|
mov dword .tex_y1, ecx
|
|
|
|
mov ecx,dword .z1
|
|
xchg ecx, .z2
|
|
mov dword .z1, ecx
|
|
end if
|
|
if (Ext=MMX)
|
|
movq mm0,.b1 ; b, g
|
|
movq mm1,.b2
|
|
movq .b1, mm1
|
|
movq .b2, mm0
|
|
movq mm2,.r1 ; r, y
|
|
movq mm3,.r2
|
|
movq .r1,mm3
|
|
movq .r2,mm2
|
|
movq mm4,.tex_x1 ; x, z
|
|
movq mm5,.tex_x2
|
|
movq .tex_x1,mm5
|
|
movq .tex_x2,mm4
|
|
|
|
end if
|
|
if Ext>=SSE
|
|
movups xmm0,.b1
|
|
movups xmm1,.b2
|
|
movups .b1,xmm1
|
|
movups .b2,xmm0
|
|
movq mm4,.tex_x1 ; x, z
|
|
movq mm5,.tex_x2
|
|
movq .tex_x1,mm5
|
|
movq .tex_x2,mm4
|
|
end if
|
|
|
|
@@:
|
|
or bx,bx
|
|
jle .quit_l
|
|
cmp ax,word[size_x_var] ;SIZE_X
|
|
jge .quit_l
|
|
|
|
push ax
|
|
push bx
|
|
|
|
mov eax,.z2 ; delta zone************
|
|
sub eax,.z1
|
|
cdq
|
|
mov bx,.x2
|
|
sub bx,.x1
|
|
movsx ebx,bx
|
|
idiv ebx
|
|
push eax ; .dz
|
|
|
|
mov eax,.b2
|
|
sub eax,.b1
|
|
cdq
|
|
idiv ebx
|
|
push eax ; .db
|
|
|
|
mov eax,.g2
|
|
sub eax,.g1
|
|
cdq
|
|
idiv ebx
|
|
push eax ; .dg
|
|
|
|
mov eax,.r2
|
|
sub eax,.r1
|
|
cdq
|
|
idiv ebx
|
|
push eax ; .dr
|
|
|
|
mov eax,.tex_x2
|
|
sub eax,.tex_x1
|
|
cdq
|
|
idiv ebx
|
|
push eax ; .dtex_x
|
|
|
|
mov eax,.tex_y2
|
|
sub eax,.tex_y1
|
|
cdq
|
|
idiv ebx
|
|
push eax ; .dtey_x
|
|
|
|
cmp .x1,0
|
|
jg @f
|
|
|
|
mov eax,.dz ; clipping
|
|
movsx ebx,.x1
|
|
neg ebx
|
|
imul ebx
|
|
add .z1,eax
|
|
mov .x1,0
|
|
|
|
mov eax,.dr
|
|
imul ebx
|
|
add .r1,eax
|
|
;if Ext=NON
|
|
mov eax,.dg
|
|
imul ebx
|
|
add .g1,eax
|
|
|
|
mov eax,.db
|
|
imul ebx
|
|
add .b1,eax
|
|
|
|
mov eax,.dtex_x
|
|
imul ebx
|
|
add .tex_x1,eax
|
|
|
|
mov eax,.dtex_y
|
|
imul ebx
|
|
add .tex_y1,eax
|
|
@@:
|
|
movsx edx,word[size_x_var] ;SIZE_X
|
|
cmp .x2,dx
|
|
jl @f
|
|
mov .x2,dx
|
|
@@:
|
|
; calc line addres begin in screen and Z buffer
|
|
movsx eax,word .y
|
|
mul edx
|
|
movsx edx,.x1
|
|
add eax,edx
|
|
|
|
mov esi,eax
|
|
shl esi,2
|
|
add esi,.z_buffer
|
|
|
|
lea eax,[eax*3]
|
|
mov edi,.screen
|
|
add edi,eax
|
|
|
|
mov cx,.x2
|
|
sub cx,.x1
|
|
movzx ecx,cx
|
|
|
|
; init current variables
|
|
push dword .tex_y1
|
|
;if Ext=NON
|
|
push dword .tex_x1
|
|
|
|
push dword .b1
|
|
push dword .g1
|
|
push dword .r1
|
|
|
|
if Ext>=MMX
|
|
movq mm4,.cr ; lo -> r,g
|
|
movq mm6,.cb ; hi -> b, tex_x
|
|
pxor mm0,mm0
|
|
end if
|
|
mov ebx,.z1
|
|
.ddraw:
|
|
cmp ebx,dword[esi]
|
|
jge @f
|
|
mov eax,.c_ty
|
|
; if ROUND<TEX_SHIFT
|
|
; shl eax,TEX_SHIFT-ROUND
|
|
; end if
|
|
; if ROUND>TEX_SHIFT
|
|
; shr eax,ROUND-TEX_SHIFT
|
|
; end if
|
|
shr eax,ROUND
|
|
shl Eax,TEX_SHIFT
|
|
mov edx,.c_tx ; calc texture pixel mem addres
|
|
shr edx,ROUND
|
|
add eax,edx
|
|
and eax,TEXTURE_SIZE ; cutting
|
|
lea eax,[3*eax]
|
|
add eax,.tex_ptr
|
|
mov dword[esi],ebx
|
|
if Ext = NON
|
|
mov eax,dword[eax]
|
|
; mov .tex_col,eax
|
|
push ax
|
|
shl eax,8
|
|
pop ax
|
|
mov edx,.cr
|
|
sar edx,ROUND
|
|
mul dl ; al*dl
|
|
shr ax,8
|
|
stosb
|
|
ror eax,16
|
|
push ax
|
|
mov edx,.cg
|
|
sar edx,ROUND
|
|
mul dl
|
|
shr ax,8
|
|
stosb
|
|
pop ax
|
|
shr ax,8
|
|
mov edx,.cb
|
|
sar edx,ROUND
|
|
mul dl
|
|
shr ax,8
|
|
stosb
|
|
jmp .no_skip
|
|
else
|
|
movd mm1,[eax]
|
|
punpcklbw mm1,mm0
|
|
movq mm3,mm4 ;.cr ; lo -> r,g
|
|
movq mm5,mm6 ;.cb ; lo -> b,tex_x
|
|
psrld mm3,ROUND ;
|
|
psrld mm5,ROUND ;
|
|
packssdw mm3,mm5
|
|
pmullw mm1,mm3
|
|
psrlw mm1,8
|
|
packuswb mm1,mm0
|
|
movd [edi],mm1
|
|
end if
|
|
mov dword[esi],ebx
|
|
if Ext = NON
|
|
jmp .no_skip
|
|
end if
|
|
@@:
|
|
add edi,3
|
|
.no_skip:
|
|
add esi,4
|
|
add ebx,.dz
|
|
|
|
mov eax,.dtex_x
|
|
add .c_tx, eax
|
|
mov edx,.dtex_y
|
|
add .c_ty, edx
|
|
if Ext=NON
|
|
mov eax,.dr
|
|
add .cr,eax
|
|
mov edx,.dg
|
|
add .cg,edx
|
|
mov eax,.db
|
|
add .cb,eax
|
|
|
|
else
|
|
paddd mm4,.drM
|
|
paddd mm6,.dbM
|
|
;; paddd mm7,.dtex_y ; mm4 - b, g
|
|
;; movq .c_tx,mm7
|
|
; mm6 - r, x
|
|
end if ; mm7 - y, x
|
|
|
|
dec ecx
|
|
jnz .ddraw
|
|
|
|
.quit_l:
|
|
|
|
mov esp,ebp
|
|
ret 42+20 ; horizontal line
|
|
|