1080 lines
22 KiB
Plaintext
1080 lines
22 KiB
Plaintext
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;SIZE_X equ 350
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;SIZE_Y equ 350
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;ROUND equ 8
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;TEX_X equ 512
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;TEX_Y equ 512
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;TEXTURE_SIZE EQU (512*512)-1
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;TEX_SHIFT EQU 9
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;CATMULL_SHIFT equ 8
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;TEXTURE_SIZE EQU (TEX_X * TEX_Y)-1
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;Ext = SSE
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;SSE = 3
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;MMX = 1
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;NON = 0
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;use32
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;------- Big thanks to Majuma (www.majuma.xt.pl) for absolutely great---
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;------- DOS 13h mode demos --------------------------------------------
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;------- Procedure draws triangle with two overlapped textures, I use --
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;--------Catmull Z-buffer algorithm- (Z coordinate interpolation)-------
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;--------I calc texture pixel by this way: col1*col2/256 ---------------
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two_tex_triangle_z:
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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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;---------------------- edx - pointer to b. texture-----
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;---------------------- esi - pointer to e. texture-----
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;---------------------- edi - pointer to screen buffer--
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;---------------------- stack : b. tex coordinates------
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;---------------------- e. tex coordinates------
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;---------------------- Z position coordinates--
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;---------------------- pointer io Z buffer-----
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;-- Z-buffer - filled with coordinates as dword --------
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;-- (Z coor. as word) shl CATMULL_SHIFT ----------------
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.b_x1 equ ebp+4 ; procedure don't save registers !!!
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.b_y1 equ ebp+6 ; each coordinate as word
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.b_x2 equ ebp+8
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.b_y2 equ ebp+10 ; b - first texture
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.b_x3 equ ebp+12
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.b_y3 equ ebp+14 ; e - second texture
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.e_x1 equ ebp+16
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.e_y1 equ ebp+18
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.e_x2 equ ebp+20
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.e_y2 equ ebp+22
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.e_x3 equ ebp+24
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.e_y3 equ ebp+26
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.z1 equ word[ebp+28]
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.z2 equ word[ebp+30]
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.z3 equ word[ebp+32]
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.z_buff equ dword[ebp+34] ; pointer to Z-buffer
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.t_bmap equ dword[ebp-4] ; pointer to b. texture
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.t_emap equ dword[ebp-8] ; pointer to e. texture
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.x1 equ word[ebp-10]
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.y1 equ word[ebp-12]
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.x2 equ word[ebp-14]
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.y2 equ word[ebp-16]
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.x3 equ word[ebp-18]
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.y3 equ word[ebp-20]
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.dx12 equ dword[ebp-24]
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.dbx12 equ dword[ebp-28]
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.dby12 equ dword[ebp-32]
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.dby12q equ [ebp-32]
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.dex12 equ dword[ebp-36]
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.dey12 equ dword[ebp-40]
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.dey12q equ [ebp-40]
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.dz12 equ dword[ebp-44]
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.dx13 equ dword[ebp-48]
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.dbx13 equ dword[ebp-52]
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.dby13 equ dword[ebp-56]
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.dby13q equ [ebp-56]
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.dex13 equ dword[ebp-60]
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.dey13 equ dword[ebp-64]
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.dey13q equ [ebp-64]
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.dz13 equ dword[ebp-68]
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.dx23 equ dword[ebp-72]
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.dbx23 equ dword[ebp-76]
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.dby23 equ dword[ebp-80]
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.dby23q equ [ebp-80]
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.dex23 equ dword[ebp-84]
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.dey23 equ dword[ebp-88]
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.dey23q equ [ebp-88]
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.dz23 equ dword[ebp-92]
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.cx1 equ dword[ebp-96] ; current variables
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.cx2 equ dword[ebp-100]
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;.cbx1q equ [ebp-104]
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.cbx1 equ dword[ebp-104]
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.cby1 equ [ebp-108]
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;.cbx2q [ebp-112]
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.cbx2 equ dword[ebp-112]
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.cby2 equ [ebp-116]
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;.cex1q equ [ebp-120]
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.cex1 equ dword[ebp-120]
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.cey1 equ [ebp-124]
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;.cex2q equ [ebp-128]
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.cex2 equ dword[ebp-128]
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.cey2 equ [ebp-132]
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.cz1 equ dword[ebp-136]
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.cz2 equ dword[ebp-140]
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if Ext >= MMX
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emms
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else
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cld
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end if
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mov ebp,esp
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push edx esi ; store bump map
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; push esi ; store e. map
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; sub esp,120
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.sort3: ; sort triangle coordinates...
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cmp ax,bx
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jle .sort1
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xchg eax,ebx
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mov edx,dword[.b_x1]
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xchg edx,dword[.b_x2]
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mov dword[.b_x1],edx
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mov edx,dword[.e_x1]
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xchg edx,dword[.e_x2]
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mov dword[.e_x1],edx
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mov dx,.z1
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xchg dx,.z2
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mov .z1,dx
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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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mov edx,dword[.b_x2]
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xchg edx,dword[.b_x3]
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mov dword[.b_x2],edx
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mov edx,dword[.e_x2]
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xchg edx,dword[.e_x3]
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mov dword[.e_x2],edx
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mov dx,.z2
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xchg dx,.z3
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mov .z2,dx
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jmp .sort3
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.sort2:
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push eax ebx ecx ; store triangle coords in variables
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; push ebx
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; push ecx
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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 .loop23_done
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; mov edx,eax ; eax,ebx,ecx are ORd together into edx which means that
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; or edx,ebx ; if any *one* of them is negative a sign flag is raised
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; or edx,ecx
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; test edx,80000000h ; Check only X
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; jne .loop23_done
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; cmp .x1,SIZE_X ; {
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; jg .loop23_done
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; cmp .x2,SIZE_X ; This can be optimized with effort
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; jg .loop23_done
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; cmp .x3,SIZE_X
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; jg .loop23_done ; {
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mov bx,.y2 ; calc delta 12
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sub bx,.y1
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jnz .bt_dx12_make
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mov ecx,6
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xor edx,edx
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@@:
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push edx ;dword 0
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loop @b
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jmp .bt_dx12_done
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.bt_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 Ext=SSE
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sub esp,16
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cvtsi2ss xmm3,ebx ;rcps
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; mov eax,255
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cvtsi2ss xmm4,[i255d] ;eax
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divss xmm3,xmm4
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rcpss xmm3,xmm3
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; mulss xmm3,xmm4
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shufps xmm3,xmm3,0
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movd mm0,[.b_x1]
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movd mm1,[.b_x2]
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movd mm2,[.e_x1]
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movd mm3,[.e_x2]
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; psubsw mm3,mm2
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; psubsw mm1,mm0
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pxor mm4,mm4
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punpcklwd mm0,mm4
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punpcklwd mm1,mm4
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punpcklwd mm2,mm4
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punpcklwd mm3,mm4
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; pslld mm0,ROUND
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; pslld mm1,ROUND
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; pslld mm2,ROUND
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; pslld mm3,ROUND
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cvtpi2ps xmm0,mm0
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movlhps xmm0,xmm0
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cvtpi2ps xmm0,mm2
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cvtpi2ps xmm1,mm1
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movlhps xmm1,xmm1
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cvtpi2ps xmm1,mm3
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subps xmm1,xmm0
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; pxor mm4,mm4
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; movq mm5,mm1
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; movq mm6,mm1
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; pcmpeqb mm5,mm4
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; psubd mm1,mm0
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; psubd mm3,mm2
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; movq mm0,[.b_x1] ; bx1 by1 bx2 by2
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; movq mm1,[.e_x1] ; ex1 ey1 ex2 ey2
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; pxor
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; punpcklhd mm0,mm1 ; lwd ;
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; psubw mm1,mm0 ; mm1, mm0
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; pxor mm2,mm2
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; pmovmaskb eax,mm1
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; and eax,10101010b
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; pcmpgtw mm2,mm1
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; punpcklwd mm1,mm2
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; psllw mm0,ROUND
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; psllw mm1,ROUND
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; movq mm2,mm0
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; psrlq mm0,32
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; cvtpi2ps xmm0,mm1
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; movlhps xmm0,xmm0
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; cvtpi2ps xmm0,mm3
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; divps xmm1,xmm3
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mulps xmm1,xmm3
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shufps xmm1,xmm1,10110001b
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cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
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movhlps xmm1,xmm1
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cvtps2pi mm1,xmm1
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movq .dey12q,mm0
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movq .dby12q,mm1
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; movd .dex12,mm0
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; psrlq mm0,32
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; movd .dey12,mm0
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; movhlps xmm1,xmm1
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; cvtps2pi mm0,xmm1
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; movd .dbx12,mm0
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; psrlq mm0,32
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; movd .dby12,mm0
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else
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mov ax,word[.b_x2]
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sub ax,word[.b_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 .dbx12,eax
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push eax
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mov ax,word[.b_y2]
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sub ax,word[.b_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 .dby12,eax
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push eax
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; mov eax,.dbx12
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; mov ebx,.dby12
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; int3
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mov ax,word[.e_x2]
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sub ax,word[.e_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 .dex12,eax
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push eax
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mov ax,word[.e_y2]
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sub ax,word[.e_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 .dey12,eax
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push eax
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end if
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mov ax,.z2
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sub ax,.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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push eax
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.bt_dx12_done:
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mov bx,.y3 ; calc delta13
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sub bx,.y1
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jnz .bt_dx13_make
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mov ecx,6
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xor edx,edx
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@@:
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push edx ;dword 0
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loop @b
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jmp .bt_dx13_done
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.bt_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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if Ext=SSE
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cvtsi2ss xmm3,ebx
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; mov eax,255
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cvtsi2ss xmm4,[i255d]
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divss xmm3,xmm4
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rcpss xmm3,xmm3
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; mulss xmm3,xmm4
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shufps xmm3,xmm3,0
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sub esp,16
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movd mm0,[.b_x1]
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movd mm1,[.b_x3]
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movd mm2,[.e_x1]
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movd mm3,[.e_x3]
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pxor mm4,mm4
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punpcklwd mm0,mm4
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punpcklwd mm1,mm4
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punpcklwd mm2,mm4
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punpcklwd mm3,mm4
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cvtpi2ps xmm0,mm0
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movlhps xmm0,xmm0
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cvtpi2ps xmm0,mm2
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cvtpi2ps xmm1,mm1
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movlhps xmm1,xmm1
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cvtpi2ps xmm1,mm3
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subps xmm1,xmm0
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; divps xmm1,xmm3
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mulps xmm1,xmm3
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shufps xmm1,xmm1,10110001b
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cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
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movhlps xmm1,xmm1
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cvtps2pi mm1,xmm1
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movq .dey13q,mm0
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movq .dby13q,mm1
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else
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mov ax,word[.b_x3]
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sub ax,word[.b_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 .dbx13,eax
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push eax
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mov ax,word[.b_y3]
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sub ax,word[.b_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 .dby13,eax
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push eax
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mov ax,word[.e_x3]
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sub ax,word[.e_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 .dex13,eax
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push eax
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mov ax,word[.e_y3]
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sub ax,word[.e_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 .dey13,eax
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push eax
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end if
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mov ax,.z3
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sub ax,.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 .dz13,eax
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push eax
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.bt_dx13_done:
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mov bx,.y3 ; calc delta23
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sub bx,.y2
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jnz .bt_dx23_make
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mov ecx,6
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xor edx,edx
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@@:
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push edx ;dword 0
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loop @b
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jmp .bt_dx23_done
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.bt_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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if Ext=SSE
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cvtsi2ss xmm3,ebx
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; mov eax,255
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cvtsi2ss xmm4,[i255d] ;eax
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divss xmm3,xmm4
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shufps xmm3,xmm3,0
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sub esp,16
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movd mm0,[.b_x2]
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movd mm1,[.b_x3]
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movd mm2,[.e_x2]
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movd mm3,[.e_x3]
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pxor mm4,mm4
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punpcklwd mm0,mm4
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punpcklwd mm1,mm4
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punpcklwd mm2,mm4
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punpcklwd mm3,mm4
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cvtpi2ps xmm0,mm0
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movlhps xmm0,xmm0
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cvtpi2ps xmm0,mm2
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cvtpi2ps xmm1,mm1
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movlhps xmm1,xmm1
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cvtpi2ps xmm1,mm3
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subps xmm1,xmm0
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divps xmm1,xmm3
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shufps xmm1,xmm1,10110001b
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cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
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movhlps xmm1,xmm1
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cvtps2pi mm1,xmm1
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movq .dey23q,mm0
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movq .dby23q,mm1
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else
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mov ax,word[.b_x3]
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sub ax,word[.b_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 .dbx23,eax
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push eax
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mov ax,word[.b_y3]
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sub ax,word[.b_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 .dby23,eax
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push eax
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mov ax,word[.e_x3]
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sub ax,word[.e_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 .dex23,eax
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push eax
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mov ax,word[.e_y3]
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sub ax,word[.e_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 .dey23,eax
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push eax
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end if
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mov ax,.z3
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sub ax,.z2
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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 .dz23,eax
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push eax
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; sub esp,40
|
|
.bt_dx23_done:
|
|
movsx eax,.x1
|
|
shl eax,ROUND
|
|
; mov .cx1,eax
|
|
; mov .cx2,eax
|
|
push eax eax
|
|
; push eax
|
|
|
|
movsx eax,word[.b_x1]
|
|
shl eax,ROUND
|
|
mov .cbx1,eax
|
|
mov .cbx2,eax
|
|
; push eax eax
|
|
; push eax
|
|
|
|
movsx eax,word[.b_y1]
|
|
shl eax,ROUND
|
|
mov .cby1,eax
|
|
mov .cby2,eax
|
|
; push eax eax
|
|
; push eax
|
|
|
|
movsx eax,word[.e_x1]
|
|
shl eax,ROUND
|
|
mov .cex1,eax
|
|
mov .cex2,eax
|
|
; push eax eax
|
|
;push eax
|
|
|
|
movsx eax,word[.e_y1]
|
|
shl eax,ROUND
|
|
mov .cey1,eax
|
|
mov .cey2,eax
|
|
sub esp,32
|
|
; push eax eax
|
|
;push eax
|
|
|
|
movsx eax,.z1
|
|
shl eax,CATMULL_SHIFT
|
|
; mov .cz1,eax
|
|
; mov .cz2,eax
|
|
push eax eax
|
|
;push eax
|
|
|
|
movsx ecx,.y1
|
|
cmp cx,.y2
|
|
jge .loop12_done
|
|
.loop12:
|
|
call .call_line
|
|
|
|
mov eax,.dx13
|
|
add .cx1,eax
|
|
mov ebx,.dx12
|
|
add .cx2,ebx
|
|
|
|
if Ext >= MMX
|
|
movq mm0,.cby2 ; with this optimization object
|
|
movq mm1,.cby1 ; looks bit annoying
|
|
movq mm2,.cey2
|
|
movq mm3,.cey1
|
|
paddd mm0,.dby12q
|
|
paddd mm1,.dby13q
|
|
paddd mm2,.dey12q
|
|
paddd mm3,.dey13q
|
|
movq .cby2,mm0
|
|
movq .cby1,mm1
|
|
movq .cey1,mm3
|
|
movq .cey2,mm2
|
|
else
|
|
mov edx,.dbx13
|
|
add .cbx1,edx
|
|
mov eax,.dbx12
|
|
add .cbx2,eax
|
|
mov ebx,.dby13
|
|
add .cby1,ebx
|
|
mov edx,.dby12
|
|
add .cby2,edx
|
|
|
|
mov eax,.dex13
|
|
add .cex1,eax
|
|
mov ebx,.dex12
|
|
add .cex2,ebx
|
|
mov edx,.dey13
|
|
add .cey1,edx
|
|
mov eax,.dey12
|
|
add .cey2,eax
|
|
|
|
end if
|
|
mov ebx,.dz13
|
|
add .cz1,ebx
|
|
mov edx,.dz12
|
|
add .cz2,edx
|
|
|
|
inc ecx
|
|
cmp cx,.y2
|
|
jl .loop12
|
|
.loop12_done:
|
|
|
|
movsx ecx,.y2
|
|
cmp cx,.y3
|
|
jge .loop23_done
|
|
|
|
movsx eax,.z2
|
|
shl eax,CATMULL_SHIFT
|
|
mov .cz2,eax
|
|
|
|
movsx eax,.x2
|
|
shl eax,ROUND
|
|
mov .cx2,eax
|
|
|
|
movzx eax,word[.b_x2]
|
|
shl eax,ROUND
|
|
mov .cbx2,eax
|
|
|
|
movzx eax,word[.b_y2]
|
|
shl eax,ROUND
|
|
mov .cby2,eax
|
|
|
|
movzx eax,word[.e_x2]
|
|
shl eax,ROUND
|
|
mov .cex2,eax
|
|
|
|
movzx eax,word[.e_y2]
|
|
shl eax,ROUND
|
|
mov .cey2,eax
|
|
|
|
.loop23:
|
|
call .call_line
|
|
;if Ext = NON
|
|
mov eax,.dx13
|
|
add .cx1,eax
|
|
mov ebx,.dx23
|
|
add .cx2,ebx
|
|
|
|
if Ext >= MMX
|
|
movq mm0,.cby2 ; with this mmx optimization object looks bit
|
|
movq mm1,.cby1 ; annoying
|
|
movq mm2,.cey2
|
|
movq mm3,.cey1
|
|
paddd mm0,.dby23q
|
|
paddd mm1,.dby13q
|
|
paddd mm2,.dey23q
|
|
paddd mm3,.dey13q
|
|
movq .cby2,mm0
|
|
movq .cby1,mm1
|
|
movq .cey2,mm2
|
|
movq .cey1,mm3
|
|
|
|
else
|
|
mov edx,.dbx13
|
|
add .cbx1,edx
|
|
mov eax,.dbx23
|
|
add .cbx2,eax
|
|
mov ebx,.dby13
|
|
add .cby1,ebx
|
|
mov edx,.dby23
|
|
add .cby2,edx
|
|
|
|
mov eax,.dex13
|
|
add .cex1,eax
|
|
mov ebx,.dex23
|
|
add .cex2,ebx
|
|
mov edx,.dey13
|
|
add .cey1,edx
|
|
mov eax,.dey23
|
|
add .cey2,eax
|
|
end if
|
|
|
|
mov ebx,.dz13
|
|
add .cz1,ebx
|
|
mov edx,.dz23
|
|
add .cz2,edx
|
|
;else
|
|
; movq mm0,.db13q
|
|
; movq mm1,.cbx1q
|
|
|
|
inc ecx
|
|
cmp cx,.y3
|
|
jl .loop23
|
|
.loop23_done:
|
|
|
|
mov esp,ebp
|
|
ret 34
|
|
|
|
.call_line:
|
|
|
|
pushad
|
|
|
|
push .cz1
|
|
push .cz2
|
|
push .z_buff
|
|
push .t_bmap
|
|
push .t_emap
|
|
push dword .cey2
|
|
push .cex2
|
|
push dword .cey1
|
|
push .cex1
|
|
push dword .cby2
|
|
push .cbx2
|
|
push dword .cby1
|
|
push .cbx1
|
|
push ecx
|
|
|
|
mov eax,.cx1
|
|
sar eax,ROUND
|
|
mov ebx,.cx2
|
|
sar ebx,ROUND
|
|
|
|
call two_tex_line_z
|
|
|
|
popad
|
|
ret
|
|
two_tex_line_z:
|
|
;--------------in: eax - x1
|
|
;-------------- ebx - x2
|
|
;-------------- edi - pointer to screen buffer
|
|
;stack - another parameters :
|
|
.y equ dword [ebp+4]
|
|
.bx1 equ [ebp+8] ; ---
|
|
.by1 equ [ebp+12] ; |
|
|
.bx2 equ [ebp+16] ; |
|
|
.by2 equ [ebp+20] ; |> b. texture and e. texture coords
|
|
.ex1 equ [ebp+24] ; |> shifted shl ROUND
|
|
.ey1 equ [ebp+28] ; |
|
|
.ex2 equ [ebp+32] ; |
|
|
.ey2 equ [ebp+36] ; ---
|
|
.emap equ [ebp+40] ; b texture offset
|
|
.bmap equ [ebp+44] ; e texture offset
|
|
.z_buff equ dword [ebp+48]
|
|
.z2 equ dword [ebp+52] ; -- |> z coords shifted
|
|
.z1 equ dword [ebp+56] ; -- shl CATMULL_SHIFT
|
|
|
|
.x1 equ dword [ebp-4]
|
|
.x2 equ dword [ebp-8]
|
|
.dbx equ [ebp-12]
|
|
.dex equ [ebp-16]
|
|
.dby equ [ebp-20]
|
|
.dey equ [ebp-24]
|
|
.dz equ dword [ebp-28]
|
|
.cbx equ [ebp-32]
|
|
.cex equ [ebp-36]
|
|
.cby equ [ebp-40]
|
|
.cey equ [ebp-44]
|
|
.cz equ dword [ebp-48]
|
|
.czbuff equ dword [ebp-52]
|
|
|
|
mov ebp,esp
|
|
|
|
mov ecx,.y
|
|
or ecx,ecx
|
|
jl .bl_end
|
|
cmp ecx,SIZE_Y
|
|
jge .bl_end
|
|
|
|
cmp eax,ebx
|
|
jl @f
|
|
je .bl_end
|
|
|
|
xchg eax,ebx
|
|
if Ext=NON
|
|
mov edx,.bx1
|
|
xchg edx,.bx2
|
|
mov .bx1,edx
|
|
mov edx,.by1
|
|
xchg edx,.by2
|
|
mov .by1,edx
|
|
|
|
mov edx,.ex1
|
|
xchg edx,.ex2
|
|
mov .ex1,edx
|
|
mov edx,.ey1
|
|
xchg edx,.ey2
|
|
mov .ey1,edx
|
|
else
|
|
movq mm0,.bx1
|
|
movq mm1,.ex1
|
|
movq mm2,.bx2
|
|
movq mm3,.ex2
|
|
movq .bx2,mm0
|
|
movq .ex2,mm1
|
|
movq .bx1,mm2
|
|
movq .ex1,mm3
|
|
end if
|
|
mov edx,.z1
|
|
xchg edx,.z2
|
|
mov .z1,edx
|
|
@@:
|
|
push eax ebx
|
|
; push ebx ;store x1, x2
|
|
|
|
cmp .x1,SIZE_X
|
|
jge .bl_end
|
|
cmp .x2,0
|
|
jle .bl_end
|
|
|
|
mov ebx,.x2
|
|
sub ebx,.x1
|
|
|
|
if Ext>=SSE
|
|
|
|
sub esp,16
|
|
cvtsi2ss xmm3,ebx ;rcps
|
|
shufps xmm3,xmm3,0
|
|
|
|
; movq mm0,.bx1q
|
|
; movq mm1,.bx2q
|
|
; movq mm2,.ex1q
|
|
; movq mm3,.ex2q
|
|
; psubd mm1,mm0
|
|
; psubd mm3,mm2
|
|
; cvtpi2ps xmm1,mm1
|
|
; movlhps xmm1,xmm1
|
|
; cvtpi2ps xmm1,mm3
|
|
|
|
cvtpi2ps xmm0,.bx1 ;mm0 ; bx1; by1
|
|
movlhps xmm0,xmm0
|
|
cvtpi2ps xmm0,.ex1 ;mm2 ; ex1; ey1
|
|
cvtpi2ps xmm1,.bx2 ;mm1 ; bx2; by2
|
|
movlhps xmm1,xmm1
|
|
cvtpi2ps xmm1,.ex2 ;mm3 ; ex2; ey2
|
|
subps xmm1,xmm0
|
|
; hi lo
|
|
divps xmm1,xmm3 ; xmm1 -> dby; dbx; dey; dex
|
|
|
|
shufps xmm1,xmm1,11011000b
|
|
cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
|
|
movhlps xmm1,xmm1
|
|
cvtps2pi mm1,xmm1
|
|
movq .dex,mm0 ; hi - lo -> dbx, dex
|
|
movq .dey,mm1 ; hi - lo -> dby, dey
|
|
|
|
else
|
|
|
|
mov eax,.bx2 ; calc .dbx
|
|
sub eax,.bx1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov eax,.ex2 ; calc .dby
|
|
sub eax,.ex1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov eax,.by2 ; calc .dex
|
|
sub eax,.by1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov eax,.ey2 ; calc .dey
|
|
sub eax,.ey1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
end if
|
|
|
|
mov eax,.z2 ; calc .dz
|
|
sub eax,.z1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
cmp .x1,0 ; set correctly begin variable
|
|
jge @f ; CLIPPING ON FUNCTION
|
|
; cutting triangle exceedes screen
|
|
mov ebx,.x1
|
|
neg ebx
|
|
imul ebx ; eax = .dz * abs(.x1)
|
|
add .z1,eax
|
|
mov .x1,0
|
|
|
|
mov eax,.dbx
|
|
imul ebx
|
|
add .bx1,eax
|
|
|
|
mov eax,.dby
|
|
imul ebx
|
|
add .by1,eax
|
|
|
|
mov eax,.dex
|
|
imul ebx
|
|
add .ex1,eax
|
|
|
|
mov eax,.dey
|
|
imul ebx
|
|
add .ey1,eax
|
|
@@:
|
|
cmp .x2,SIZE_X
|
|
jl @f
|
|
mov .x2,SIZE_X
|
|
@@:
|
|
mov eax,SIZE_X ;calc memory begin in buffers
|
|
mov ebx,.y
|
|
mul ebx
|
|
mov ebx,.x1
|
|
add eax,ebx
|
|
mov ebx,eax
|
|
lea eax,[eax*3]
|
|
add edi,eax ; edi - screen
|
|
mov esi,.z_buff ; z-buffer filled with dd variables
|
|
shl ebx,2
|
|
add esi,ebx ; esi - Z buffer
|
|
|
|
mov ecx,.x2
|
|
sub ecx,.x1
|
|
; init current variables
|
|
push dword .bx1 ;.by1 .ex1 .ey1 .z1 esi
|
|
push dword .ex1
|
|
push dword .by1
|
|
push dword .ey1
|
|
|
|
push .z1 ; current z shl CATMULL_SHIFT
|
|
push esi
|
|
|
|
if Ext >= MMX
|
|
pxor mm0,mm0
|
|
movq mm3,.cex ; hi - lo -> cbx; cex
|
|
movq mm4,.cey ; hi - lo -> cby; cey
|
|
; movq mm5,mm3
|
|
; movq mm6,mm4
|
|
; psrad mm5,ROUND
|
|
; psrad mm6,ROUND
|
|
; movq .ceyq,mm5
|
|
; movq .cbyq,mm6
|
|
mov edx,.czbuff
|
|
else
|
|
cld
|
|
end if
|
|
.draw:
|
|
; if TEX = SHIFTING ;bump drawing only in shifting mode
|
|
if Ext=NON
|
|
mov esi,.czbuff ; .czbuff current address in buffer
|
|
mov ebx,.cz ; .cz - cur z position
|
|
cmp ebx,dword[esi]
|
|
else
|
|
mov ebx,.cz
|
|
cmp ebx,dword[edx]
|
|
end if
|
|
jge .skip
|
|
|
|
if Ext=NON
|
|
mov eax,.cby
|
|
mov esi,.cbx
|
|
sar eax,ROUND
|
|
sar esi,ROUND
|
|
shl eax,TEX_SHIFT ;-
|
|
add esi,eax
|
|
lea esi,[esi*3] ;- ; esi - current b. texture addres
|
|
add esi,.bmap
|
|
|
|
mov ebx,.cex ;.cex - current env map X
|
|
mov eax,.cey ;.cey - current env map y
|
|
sar ebx,ROUND
|
|
sar eax,ROUND
|
|
|
|
shl eax,TEX_SHIFT
|
|
add ebx,eax
|
|
lea ebx,[ebx*3]
|
|
add ebx,.emap
|
|
|
|
|
|
else
|
|
movq mm5,mm4 ;.cey
|
|
psrad mm5,ROUND
|
|
pslld mm5,TEX_SHIFT
|
|
movq mm6,mm3 ;.cex
|
|
psrad mm6,ROUND
|
|
paddd mm5,mm6
|
|
movq mm6,mm5
|
|
paddd mm5,mm5
|
|
paddd mm5,mm6
|
|
paddd mm5,.emap
|
|
movd esi,mm5
|
|
psrlq mm5,32
|
|
movd ebx,mm5
|
|
end if
|
|
if Ext>=MMX
|
|
movd mm1,[esi]
|
|
movd mm2,[ebx]
|
|
punpcklbw mm1,mm0
|
|
punpcklbw mm2,mm0
|
|
pmullw mm1,mm2
|
|
psrlw mm1,8
|
|
packuswb mm1,mm0
|
|
movd [edi],mm1
|
|
mov ebx,.cz
|
|
mov dword[edx],ebx
|
|
else
|
|
cld ; esi - tex e.
|
|
lodsb ; ebx - tex b.
|
|
mov dl,[ebx]
|
|
mul dl
|
|
shr ax,8
|
|
stosb
|
|
inc ebx
|
|
lodsb
|
|
mov dl,[ebx]
|
|
mul dl
|
|
shr ax,8
|
|
stosb
|
|
inc ebx
|
|
lodsb
|
|
mov dl,[ebx]
|
|
mul dl
|
|
shr ax,8
|
|
stosb
|
|
mov ebx,.cz
|
|
mov esi,.czbuff
|
|
mov dword[esi],ebx
|
|
jmp .no_skip
|
|
end if
|
|
.skip:
|
|
add edi,3
|
|
|
|
if Ext = NON
|
|
.no_skip:
|
|
add .czbuff,4
|
|
mov eax,.dbx
|
|
add .cbx,eax
|
|
mov eax,.dby
|
|
add .cby,eax
|
|
mov eax,.dex
|
|
add .cex,eax
|
|
mov eax,.dey
|
|
add .cey,eax
|
|
else
|
|
add edx,4
|
|
paddd mm3,.dex
|
|
paddd mm4,.dey
|
|
; movq mm5,mm3
|
|
; movq mm6,mm4
|
|
; psrad mm5,ROUND
|
|
; psrad mm6,ROUND
|
|
; movq .cex,mm3
|
|
; movq .cey,mm4
|
|
end if
|
|
mov eax,.dz
|
|
add .cz,eax
|
|
if Ext = NON
|
|
dec ecx
|
|
jnz .draw
|
|
else
|
|
loop .draw
|
|
end if
|
|
|
|
.bl_end:
|
|
mov esp,ebp
|
|
ret 56
|
|
|