forked from KolibriOS/kolibrios
345 lines
6.6 KiB
NASM
345 lines
6.6 KiB
NASM
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INTERP_Z equ 1
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macro DRAW_INIT
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{
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if TGL_FEATURE_RENDER_BITS eq 24
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mov ecx,[p2]
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mov eax,[ecx+offs_zbup_r]
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shr eax,8
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mov [colorR],eax ;colorR=p2.r>>8
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mov eax,[ecx+offs_zbup_g]
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shr eax,8
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mov [colorG],eax ;colorG=p2.g>>8
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mov eax,[ecx+offs_zbup_b]
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shr eax,8
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mov [colorB],eax ;colorB=p2.b>>8
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else
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; color=RGB_TO_PIXEL(p2->r,p2->g,p2->b);
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end if
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}
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macro PUT_PIXEL _a
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{
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; zz=z >> ZB_POINT_Z_FRAC_BITS;
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; if (zz >= pz[_a]) {
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if TGL_FEATURE_RENDER_BITS eq 24
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; pp[3 * _a]=colorR;
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; pp[3 * _a + 1]=colorG;
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; pp[3 * _a + 2]=colorB;
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; pz[_a]=zz;
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else
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; pp[_a]=color;
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; pz[_a]=zz;
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end if
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; }
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; z+=dzdx;
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}
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align 4
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proc ZB_fillTriangleFlat, zb:dword, p0:dword, p1:dword, p2:dword
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locals
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if TGL_FEATURE_RENDER_BITS eq 24
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colorR db ?
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colorG db ?
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colorB db ? ;unsigned char
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else
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color dd ? ;int
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end if
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include 'ztriangle.inc'
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ret
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endp
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;
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; Smooth filled triangle.
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; The code below is very tricky :)
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;
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INTERP_Z equ 1
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INTERP_RGB equ 1
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macro DRAW_INIT
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{
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if TGL_FEATURE_RENDER_BITS eq 16
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; _drgbdx=((drdx / (1<<6)) << 22) & 0xFFC00000;
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; _drgbdx|=(dgdx / (1<<5)) & 0x000007FF;
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; _drgbdx|=((dbdx / (1<<7)) << 12) & 0x001FF000;
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end if
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}
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macro PUT_PIXEL _a
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{
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; zz=z >> ZB_POINT_Z_FRAC_BITS;
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if TGL_FEATURE_RENDER_BITS eq 24
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; if (zz >= pz[_a]) {
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; pp[3 * _a]=or1 >> 8;
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; pp[3 * _a + 1]=og1 >> 8;
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; pp[3 * _a + 2]=ob1 >> 8;
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; pz[_a]=zz;
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; }
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; z+=dzdx;
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; og1+=dgdx;
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; or1+=drdx;
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; ob1+=dbdx;
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elseif TGL_FEATURE_RENDER_BITS eq 16
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; if (zz >= pz[_a]) {
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; tmp=rgb & 0xF81F07E0;
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; pp[_a]=tmp | (tmp >> 16);
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; pz[_a]=zz;
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; }
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; z+=dzdx;
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; rgb=(rgb+drgbdx) & ( ~ 0x00200800);
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else
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; if (zz >= pz[_a]) {
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; pp[_a] = RGB_TO_PIXEL(or1, og1, ob1);
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; pz[_a]=zz;
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; }
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; z+=dzdx;
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; og1+=dgdx;
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; or1+=drdx;
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; ob1+=dbdx;
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end if
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}
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macro DRAW_LINE
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{
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if TGL_FEATURE_RENDER_BITS eq 16
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; register unsigned short *pz;
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; register PIXEL *pp;
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; register unsigned int tmp,z,zz,rgb,drgbdx;
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; register int n;
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; n=(x2 >> 16) - x1;
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; pp=pp1+x1;
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; pz=pz1+x1;
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; z=z1;
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; rgb=(r1 << 16) & 0xFFC00000;
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; rgb|=(g1 >> 5) & 0x000007FF;
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; rgb|=(b1 << 5) & 0x001FF000;
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; drgbdx=_drgbdx;
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; while (n>=3) {
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; PUT_PIXEL(0);
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; PUT_PIXEL(1);
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; PUT_PIXEL(2);
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; PUT_PIXEL(3);
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; pz+=4;
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; pp+=4;
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; n-=4;
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; }
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; while (n>=0) {
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; PUT_PIXEL(0);
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; pz+=1;
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; pp+=1;
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; n-=1;
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; }
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end if
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if TGL_FEATURE_RENDER_BITS eq 24
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; register unsigned short *pz;
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; register PIXEL *pp;
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; register unsigned int s,t,z,zz;
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; register int n,dsdx,dtdx;
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; float sz,tz,fz,zinv;
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; n=(x2>>16)-x1;
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; fz=(float)z1;
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; zinv=1.0 / fz;
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; pp=(pp1 + x1 * PSZB);
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; pz=pz1+x1;
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; z=z1;
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; sz=sz1;
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; tz=tz1;
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; while (n>=(NB_INTERP-1)) {
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; {
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; float ss,tt;
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; ss=(sz * zinv);
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; tt=(tz * zinv);
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; s=(int) ss;
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; t=(int) tt;
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; dsdx= (int)( (dszdx - ss*fdzdx)*zinv );
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; dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );
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; fz+=fndzdx;
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; zinv=1.0 / fz;
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; }
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; PUT_PIXEL(0);
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; PUT_PIXEL(1);
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; PUT_PIXEL(2);
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; PUT_PIXEL(3);
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; PUT_PIXEL(4);
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; PUT_PIXEL(5);
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; PUT_PIXEL(6);
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; PUT_PIXEL(7);
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; pz+=NB_INTERP;
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; pp=(pp + NB_INTERP * PSZB);
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; n-=NB_INTERP;
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; sz+=ndszdx;
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; tz+=ndtzdx;
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; }
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; {
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; float ss,tt;
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; ss=(sz * zinv);
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; tt=(tz * zinv);
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; s=(int) ss;
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; t=(int) tt;
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; dsdx= (int)( (dszdx - ss*fdzdx)*zinv );
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; dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );
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; }
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; while (n>=0) {
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; PUT_PIXEL(0);
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; pz+=1;
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; pp=(PIXEL *)((char *)pp + PSZB);
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; n-=1;
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; }
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end if
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}
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align 4
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proc ZB_fillTriangleSmooth, zb:dword, p0:dword, p1:dword, p2:dword
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locals
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if TGL_FEATURE_RENDER_BITS eq 16
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_drgbdx dd ? ;int
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end if
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include 'ztriangle.inc'
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ret
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endp
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align 4
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proc ZB_setTexture uses eax ebx, zb:dword, texture:dword
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mov eax,[zb]
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mov ebx,[texture]
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mov dword[eax+offs_zbuf_current_texture],ebx
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ret
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endp
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INTERP_Z equ 1
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INTERP_ST equ 1
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macro DRAW_INIT
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{
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; texture=zb->current_texture;
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}
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macro PUT_PIXEL _a
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{
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; zz=z >> ZB_POINT_Z_FRAC_BITS;
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if TGL_FEATURE_RENDER_BITS eq 24
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; unsigned char *ptr;
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; if (zz >= pz[_a]) {
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; ptr = texture + (((t & 0x3FC00000) | s) >> 14) * 3;
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; pp[3 * _a]= ptr[0];
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; pp[3 * _a + 1]= ptr[1];
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; pp[3 * _a + 2]= ptr[2];
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; pz[_a]=zz;
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; }
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else
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; if (zz >= pz[_a]) {
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; pp[_a]=texture[((t & 0x3FC00000) | s) >> 14];
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; pz[_a]=zz;
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; }
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end if
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; z+=dzdx;
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; s+=dsdx;
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; t+=dtdx;
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}
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align 4
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proc ZB_fillTriangleMapping, zb:dword, p0:dword, p1:dword, p2:dword
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locals
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texture dd ? ;PIXEL*
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include 'ztriangle.inc'
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ret
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endp
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;
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; Texture mapping with perspective correction.
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; We use the gradient method to make less divisions.
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; TODO: pipeline the division
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;
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if 1
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INTERP_Z equ 1
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INTERP_STZ equ 1
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NB_INTERP equ 8
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macro DRAW_INIT
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{
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; texture=zb->current_texture;
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; fdzdx=(float)dzdx;
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; fndzdx=NB_INTERP * fdzdx;
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; ndszdx=NB_INTERP * dszdx;
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; ndtzdx=NB_INTERP * dtzdx;
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}
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macro PUT_PIXEL _a
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{
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; zz=z >> ZB_POINT_Z_FRAC_BITS;
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if TGL_FEATURE_RENDER_BITS eq 24
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; unsigned char *ptr;
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; if (zz >= pz[_a]) {
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; ptr = texture + (((t & 0x3FC00000) | (s & 0x003FC000)) >> 14) * 3;
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; pp[3 * _a]= ptr[0];
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; pp[3 * _a + 1]= ptr[1];
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; pp[3 * _a + 2]= ptr[2];
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; pz[_a]=zz;
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; }
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else
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; if (zz >= pz[_a]) {
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; pp[_a]=*(PIXEL *)((char *)texture+
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; (((t & 0x3FC00000) | (s & 0x003FC000)) >> (17 - PSZSH)));
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; pz[_a]=zz;
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; }
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end if
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; z+=dzdx;
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; s+=dsdx;
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; t+=dtdx;
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}
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align 4
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proc ZB_fillTriangleMappingPerspective, zb:dword, p0:dword, p1:dword, p2:dword
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locals
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; PIXEL *texture;
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; float fdzdx,fndzdx,ndszdx,ndtzdx;
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include 'ztriangle.inc'
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ret
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endp
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end if
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if 0
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; slow but exact version (only there for reference, incorrect for 24
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; bits)
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INTERP_Z equ 1
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INTERP_STZ equ 1
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macro DRAW_INIT
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{
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; texture=zb->current_texture;
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}
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macro PUT_PIXEL _a
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{
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; float zinv;
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; int s,t;
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; zz=z >> ZB_POINT_Z_FRAC_BITS;
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; if (zz >= pz[_a]) {
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; zinv= 1.0 / (float) z;
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; s= (int) (sz * zinv);
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; t= (int) (tz * zinv);
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; pp[_a]=texture[((t & 0x3FC00000) | s) >> 14];
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; pz[_a]=zz;
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; }
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; z+=dzdx;
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; sz+=dszdx;
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; tz+=dtzdx;
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}
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align 4
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proc ZB_fillTriangleMappingPerspective, zb:dword, p0:dword, p1:dword, p2:dword
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locals
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texture dd ? ;PIXEL*
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include 'ztriangle.inc'
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ret
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endp
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end if
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