1096 lines
23 KiB
Plaintext
1096 lines
23 KiB
Plaintext
;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 = NON
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;MMX = 1
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;NON = 0
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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 bump triangle using Catmull Z-buffer algorithm-
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;------- (Z coordinate interpolation)-----------------------------------
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bump_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 bump map ------
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;---------------------- esi - pointer to environment map
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;---------------------- edi - pointer to screen buffer--
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;---------------------- stack : bump coordinates--------
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;---------------------- environment 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
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.b_x3 equ ebp+12
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.b_y3 equ ebp+14
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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 bump map
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.t_emap equ dword[ebp-8] ; pointer to e. map
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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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.dz12 equ [ebp-28]
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.dbx12 equ dword[ebp-32]
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.dby12 equ [ebp-36]
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.dex12 equ dword[ebp-40]
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.dey12 equ [ebp-44]
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.dx13 equ dword[ebp-48]
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.dz13 equ [ebp-52]
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.dbx13 equ dword[ebp-56]
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.dby13 equ [ebp-60]
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.dex13 equ dword[ebp-64]
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.dey13 equ [ebp-68]
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.dx23 equ dword[ebp-72]
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.dz23 equ [ebp-76]
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.dbx23 equ dword[ebp-80]
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.dby23 equ [ebp-84]
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.dex23 equ dword[ebp-88]
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.dey23 equ [ebp-92]
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.cx1 equ dword[ebp-96] ; current variables
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.cz1 equ [ebp-100]
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.cx2 equ dword[ebp-104]
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.cz2 equ [ebp-108]
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.cbx1 equ dword[ebp-112]
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.cby1 equ [ebp-116]
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.cbx2 equ dword[ebp-120]
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.cby2 equ [ebp-124]
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.cex1 equ dword[ebp-128]
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.cey1 equ [ebp-132]
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.cex2 equ dword[ebp-136]
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.cey2 equ [ebp-140]
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mov ebp,esp
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push edx ; 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 ; 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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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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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]
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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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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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psubd mm1,mm0
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psubd mm3,mm2
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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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; 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 .dey12,mm0
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movq .dby12,mm1
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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 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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.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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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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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]
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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_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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psubd mm1,mm0
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psubd mm3,mm2
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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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; 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 .dey13,mm0
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movq .dby13,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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.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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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
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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]
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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_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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psubd mm1,mm0
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psubd mm3,mm2
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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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; 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 .dey23,mm0
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movq .dby23,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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.bt_dx23_done:
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sub esp,48
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movsx eax,.x1
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shl eax,ROUND
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mov .cx1,eax
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mov .cx2,eax
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; push eax
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; push eax
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movsx eax,word[.b_x1]
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shl eax,ROUND
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mov .cbx1,eax
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mov .cbx2,eax
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; push eax
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; push eax
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movsx eax,word[.b_y1]
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shl eax,ROUND
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mov .cby1,eax
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mov .cby2,eax
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; push eax
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; push eax
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movsx eax,word[.e_x1]
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shl eax,ROUND
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mov .cex1,eax
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mov .cex2,eax
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; push eax
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; push eax
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movsx eax,word[.e_y1]
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shl eax,ROUND
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mov .cey1,eax
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mov .cey2,eax
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; push eax
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; push eax
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movsx eax,.z1
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shl eax,CATMULL_SHIFT
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mov .cz1,eax
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mov .cz2,eax
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; push eax
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; push eax
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movsx ecx,.y1
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cmp cx,.y2
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jge .loop12_done
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.loop12:
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call .call_bump_line
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if Ext >= MMX
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movq mm0,.cby2
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movq mm1,.cby1
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movq mm2,.cey2
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movq mm3,.cey1
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movq mm4,.cz1
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movq mm5,.cz2
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paddd mm0,.dby12
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paddd mm1,.dby13
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paddd mm2,.dey12
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|
paddd mm3,.dey13
|
|
paddd mm4,.dz13
|
|
paddd mm5,.dz12
|
|
movq .cby2,mm0
|
|
movq .cby1,mm1
|
|
movq .cey1,mm3
|
|
movq .cey2,mm2
|
|
movq .cz1,mm4
|
|
movq .cz2,mm5
|
|
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
|
|
|
|
mov eax,.dx13
|
|
add .cx1,eax
|
|
mov ebx,.dx12
|
|
add .cx2,ebx
|
|
|
|
mov ebx,.dz13
|
|
add .cz1,ebx
|
|
mov edx,.dz12
|
|
add .cz2,edx
|
|
end if
|
|
inc ecx
|
|
cmp cx,.y2
|
|
jl .loop12
|
|
.loop12_done:
|
|
|
|
movsx ecx,.y2
|
|
cmp cx,.y3
|
|
jge .loop23_done
|
|
|
|
movsx eax,.z2
|
|
shl eax,CATMULL_SHIFT
|
|
mov .cz2,eax
|
|
|
|
movsx eax,.x2
|
|
shl eax,ROUND
|
|
mov .cx2,eax
|
|
|
|
movzx eax,word[.b_x2]
|
|
shl eax,ROUND
|
|
mov .cbx2,eax
|
|
|
|
movzx eax,word[.b_y2]
|
|
shl eax,ROUND
|
|
mov .cby2,eax
|
|
|
|
movzx eax,word[.e_x2]
|
|
shl eax,ROUND
|
|
mov .cex2,eax
|
|
|
|
movzx eax,word[.e_y2]
|
|
shl eax,ROUND
|
|
mov .cey2,eax
|
|
|
|
.loop23:
|
|
call .call_bump_line
|
|
|
|
if Ext >= MMX
|
|
movq mm0,.cby2
|
|
movq mm1,.cby1
|
|
movq mm2,.cey2
|
|
movq mm3,.cey1
|
|
movq mm4,.cz1
|
|
movq mm5,.cz2
|
|
paddd mm0,.dby23
|
|
paddd mm1,.dby13
|
|
paddd mm2,.dey23
|
|
paddd mm3,.dey13
|
|
paddd mm4,.dz13
|
|
paddd mm5,.dz23
|
|
movq .cby2,mm0
|
|
movq .cby1,mm1
|
|
movq .cey1,mm3
|
|
movq .cey2,mm2
|
|
movq .cz1,mm4
|
|
movq .cz2,mm5
|
|
else
|
|
mov eax,.dx13
|
|
add .cx1,eax
|
|
mov ebx,.dx23
|
|
add .cx2,ebx
|
|
|
|
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
|
|
|
|
mov ebx,.dz13
|
|
add .cz1,ebx
|
|
mov edx,.dz23
|
|
add .cz2,edx
|
|
end if
|
|
inc ecx
|
|
cmp cx,.y3
|
|
jl .loop23
|
|
.loop23_done:
|
|
|
|
mov esp,ebp
|
|
ret 34
|
|
|
|
.call_bump_line:
|
|
|
|
; push ebp
|
|
; push ecx
|
|
pushad
|
|
|
|
push dword .cz1
|
|
push dword .cz2
|
|
push .z_buff
|
|
push .t_emap
|
|
push .t_bmap
|
|
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 bump_line_z
|
|
|
|
popad
|
|
ret
|
|
bump_line_z:
|
|
;--------------in: eax - x1
|
|
;-------------- ebx - x2
|
|
;-------------- edi - pointer to screen buffer
|
|
;stack - another parameters :
|
|
.y equ dword [ebp+4]
|
|
.bx1q equ [ebp+8]
|
|
.bx2q equ [ebp+16]
|
|
.ex1q equ [ebp+24]
|
|
.ex2q equ [ebp+32]
|
|
.bx1 equ dword [ebp+8] ; ---
|
|
.by1 equ dword [ebp+12] ; |
|
|
.bx2 equ dword [ebp+16] ; |
|
|
.by2 equ dword [ebp+20] ; |> bump and env coords
|
|
.ex1 equ dword [ebp+24] ; |> shifted shl ROUND
|
|
.ey1 equ dword [ebp+28] ; |
|
|
.ex2 equ dword [ebp+32] ; |
|
|
.ey2 equ dword [ebp+36] ; ---
|
|
;.bx1q equ qword [ebp+8] ; - new
|
|
;.ex1q equ qword [ebp+24] ; - new
|
|
.bmap equ dword [ebp+40]
|
|
.emap equ dword [ebp+44]
|
|
.z_buff equ dword [ebp+48]
|
|
.z2 equ dword [ebp+52] ; -- |> z coords shifted
|
|
.z1 equ dword [ebp+56] ; -- shl CATMULL_SHIFT
|
|
|
|
.x1 equ dword [ebp-4]
|
|
.x2 equ dword [ebp-8]
|
|
.dbx equ dword [ebp-12]
|
|
.dby equ dword [ebp-16]
|
|
.dbyq equ qword [ebp-16] ; - new
|
|
.dex equ dword [ebp-20]
|
|
.dey equ dword [ebp-24]
|
|
.deyq equ qword [ebp-24] ; - new
|
|
.dz equ dword [ebp-28]
|
|
.cbx equ dword [ebp-32]
|
|
.cby equ dword [ebp-36]
|
|
.cbyq equ qword [ebp-36] ; - new
|
|
.cex equ dword [ebp-40]
|
|
.cey equ dword [ebp-44]
|
|
.ceyq equ qword [ebp-44] ; - new
|
|
.cz equ dword [ebp-48]
|
|
.czbuff equ dword [ebp-52]
|
|
.temp1 equ ebp-60
|
|
.temp2 equ ebp-68
|
|
.temp3 equ ebp-76
|
|
.temp4 equ ebp-84
|
|
.temp5 equ ebp-92
|
|
|
|
mov ebp,esp
|
|
|
|
mov ecx,.y
|
|
or ecx,ecx
|
|
jl .bl_end
|
|
cmp ecx,SIZE_Y
|
|
jge .bl_end
|
|
|
|
cmp eax,ebx
|
|
jl .bl_ok
|
|
je .bl_end
|
|
|
|
xchg eax,ebx
|
|
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,.bx1q
|
|
movq mm1,.ex1q
|
|
movq mm2,.bx2q
|
|
movq mm3,.ex2q
|
|
movq .bx2q,mm0
|
|
movq .ex2q,mm1
|
|
movq .bx1q,mm2
|
|
movq .ex1q,mm3
|
|
|
|
end if
|
|
|
|
mov edx,.z1
|
|
xchg edx,.z2
|
|
mov .z1,edx
|
|
|
|
.bl_ok:
|
|
|
|
push eax
|
|
push ebx ;store x1, x2
|
|
|
|
cmp .x1,SIZE_X
|
|
jge .bl_end
|
|
cmp .x2,0
|
|
jle .bl_end
|
|
|
|
mov ebx,.x2
|
|
sub ebx,.x1
|
|
|
|
if Ext >= SSE
|
|
|
|
sub esp,16
|
|
cvtsi2ss xmm3,ebx ;rcps
|
|
shufps xmm3,xmm3,0
|
|
|
|
cvtpi2ps xmm0,.bx1q ;mm0
|
|
movlhps xmm0,xmm0
|
|
cvtpi2ps xmm0,.ex1q ;mm2
|
|
cvtpi2ps xmm1,.bx2q ;mm1
|
|
movlhps xmm1,xmm1
|
|
cvtpi2ps xmm1,.ex2q ;mm3
|
|
subps xmm1,xmm0
|
|
|
|
divps xmm1,xmm3
|
|
|
|
shufps xmm1,xmm1,10110001b
|
|
cvtps2pi mm0,xmm1 ; mm0 -> 2 delta dwords
|
|
movhlps xmm1,xmm1
|
|
cvtps2pi mm1,xmm1
|
|
movq .deyq,mm0
|
|
movq .dbyq,mm1
|
|
|
|
else
|
|
|
|
mov eax,.bx2 ; calc .dbx
|
|
sub eax,.bx1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov eax,.by2 ; calc .dby
|
|
sub eax,.by1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov eax,.ex2 ; calc .dex
|
|
sub eax,.ex1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
mov eax,.ey2 ; calc .dey
|
|
sub eax,.ey1
|
|
cdq
|
|
idiv ebx
|
|
push eax
|
|
|
|
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
|
|
mov esi,.z_buff ; z-buffer filled with dd variables
|
|
shl ebx,2
|
|
add esi,ebx
|
|
|
|
mov ecx,.x2
|
|
sub ecx,.x1
|
|
; init current variables
|
|
push .bx1
|
|
push .by1
|
|
push .ex1
|
|
push .ey1
|
|
|
|
push .z1 ; current z shl CATMULL_SHIFT
|
|
push esi
|
|
; It's my first attempt at MMX :), have mercy - Macgub
|
|
|
|
;; if Ext = MMX
|
|
; mov dword[.temp1],esi
|
|
; mov dword[.temp1+4],esi
|
|
;; movq mm0,.cbyq ; mm0 - current bump coords
|
|
;; movq mm1,.ceyq ; mm1 - current env coords
|
|
;; movq mm2,.dbyq ; mm2 - delta bump
|
|
;; movq mm3,.deyq ; mm3 - delta env
|
|
; movd mm6,.z1 ; mm6 - cur z
|
|
; movq mm7,qword.[temp1] ; mm7 = lo = hi dword = current z buff
|
|
;; mov dword [.temp2],1
|
|
;; mov dword [.temp2+4],-1
|
|
;; mov dword [.temp3],TEXTURE_SIZE
|
|
;; mov dword [.temp3+4],TEXTURE_SIZE
|
|
;; mov esi,.bmap
|
|
;; mov dword [.temp4],esi
|
|
;; mov dword [.temp4+4],esi
|
|
;; mov dword [.temp5],TEX_X
|
|
;; mov dword [.temp5+4],- TEX_X
|
|
; mov dword [.temp1],TEX_SHIFT
|
|
; mov dword [.temp1+4],0
|
|
;; end if
|
|
|
|
.draw:
|
|
; if TEX = SHIFTING ;bump drawing only in shifting mode
|
|
mov esi,.czbuff ; .czbuff current address in buffer
|
|
mov ebx,.cz ; .cz - cur z position
|
|
cmp ebx,dword[esi]
|
|
jge .skip
|
|
;; if Ext=NON
|
|
mov eax,.cby
|
|
sar eax,ROUND
|
|
mov esi,.cbx
|
|
sar esi,ROUND
|
|
;; else
|
|
;; movq mm4,mm0 ; mm4 - copies of cur bump coords
|
|
;; psrad mm4,ROUND ; mm4 = lo dword = y b coord, hi dword = x b coord
|
|
;; movd eax,mm4 ; -
|
|
;; psrlq mm4,32 ; -
|
|
;; movd esi,mm4 ; -
|
|
;;
|
|
;;; punpckldq mm5,mm4 ;
|
|
;;; psllq mm5,TEX_SHIFT
|
|
;;; paddq mm4,mm5 ; mm4 - lo dword index to b. map
|
|
;;
|
|
;; ; packqd mm4,mm5
|
|
; movq mm5,mm4 ; mm5 ~~ current bump map index?
|
|
|
|
;; end if
|
|
shl eax,TEX_SHIFT ;-
|
|
add esi,eax ;- ; esi - current bump map index
|
|
;; if Ext = NON
|
|
mov ebx,esi
|
|
dec ebx
|
|
and ebx,TEXTURE_SIZE
|
|
add ebx,.bmap
|
|
movzx eax,byte [ebx]
|
|
|
|
mov ebx,esi
|
|
inc ebx
|
|
and ebx,TEXTURE_SIZE
|
|
add ebx,.bmap
|
|
movzx ebx,byte [ebx]
|
|
;; else ;-------------------------------------------
|
|
;; mov dword [.temp1],esi ;-
|
|
;; mov dword [.temp1+4],esi ;-
|
|
;; movq mm5, qword[.temp1] ;-
|
|
;; paddd mm5, qword[.temp2] ; .temp2 == low dword = 1, high dword = -1
|
|
;; pand mm5, qword[.temp3] ; .temp3 == low = high dword = TEX_SIZE
|
|
;; paddd mm5, qword[.temp4] ; .temp4 == low = high dword = .bmap
|
|
;; movd ebx,mm5
|
|
;; psrlq mm5,32
|
|
;; movd eax,mm5
|
|
;; movzx ebx,byte[ebx]
|
|
;; movzx eax,byte[eax]
|
|
;; end if
|
|
sub eax,ebx
|
|
;; if Ext=NON
|
|
mov ebx,esi
|
|
sub ebx,TEX_X
|
|
and ebx,TEXTURE_SIZE
|
|
add ebx,.bmap
|
|
movzx edx,byte [ebx]
|
|
|
|
mov ebx,esi
|
|
add ebx,TEX_X
|
|
and ebx,TEXTURE_SIZE
|
|
add ebx,.bmap
|
|
movzx ebx,byte [ebx]
|
|
;; else
|
|
;; movq mm5, qword[.temp1] ;-
|
|
;; paddd mm5, qword[.temp5] ; .temp5 == low dword = TEX_X, high dword = -TEX_X
|
|
;; pand mm5, qword[.temp3] ; .temp3 == low = high dword = TEX_SIZE
|
|
;; paddd mm5, qword[.temp4] ; .temp4 == low = high dword = offset .bmap
|
|
;; movd ebx,mm5
|
|
;; psrlq mm5,32
|
|
;; movd edx,mm5
|
|
;; movzx ebx,byte[ebx]
|
|
;; movzx edx,byte[edx]
|
|
;; end if
|
|
sub edx,ebx
|
|
; eax - horizontal sub
|
|
; edx - vertical sub
|
|
;; if Ext=NON
|
|
mov ebx,.cex ;.cex - current env map X
|
|
sar ebx,ROUND
|
|
add eax,ebx ; eax - modified x coord
|
|
|
|
mov ebx,.cey ;.cey - current env map y
|
|
sar ebx,ROUND
|
|
add edx,ebx ; edx - modified y coord
|
|
;; else
|
|
;; movq mm5,mm1 ; mm5 - copy of cur env coords
|
|
;; psrad mm5,ROUND
|
|
;; movq qword[.temp1],mm5
|
|
;; add eax,dword [.temp1]
|
|
;; add edx,dword [.temp1+4]
|
|
;; ; movd ebx,mm5
|
|
;; ; add eax,ebx
|
|
;; ; psrlq mm5,32
|
|
;; ; movd ebx,mm5
|
|
; add edx,ebx
|
|
;; end if
|
|
|
|
or eax,eax
|
|
jl .black
|
|
cmp eax,TEX_X
|
|
jg .black
|
|
or edx,edx
|
|
jl .black
|
|
cmp edx,TEX_Y
|
|
jg .black
|
|
|
|
shl edx,TEX_SHIFT
|
|
add edx,eax
|
|
lea edx,[edx*3]
|
|
add edx,.emap
|
|
mov eax,dword[edx]
|
|
jmp .put_pixel
|
|
.black:
|
|
xor eax,eax
|
|
.put_pixel:
|
|
stosd
|
|
dec edi
|
|
mov ebx,.cz
|
|
mov esi,.czbuff
|
|
mov dword[esi],ebx
|
|
jmp .no_skip
|
|
.skip:
|
|
add edi,3
|
|
.no_skip:
|
|
add .czbuff,4
|
|
;; if Ext = NON
|
|
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
|
|
;; paddd mm0,mm2
|
|
;; paddd mm1,mm3
|
|
;; end if
|
|
mov eax,.dz
|
|
add .cz,eax
|
|
|
|
dec ecx
|
|
jnz .draw
|
|
; end if
|
|
.bl_end:
|
|
mov esp,ebp
|
|
ret 56
|