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kolibrios/programs/develop/libraries/TinyGL/asm_fork/light.asm
IgorA 62b33c4994 Fork for library tinygl, assembly version. 
Can draw lines, and do some matrix operations.

git-svn-id: svn://kolibrios.org@5153 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-10-31 21:28:24 +00:00

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8.7 KiB
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;include 'msghandling.inc'
align 4
proc glopMaterial, context:dword, p:dword
; int mode=p[1].i;
; int type=p[2].i;
; float *v=&p[3].f;
; int i;
; GLMaterial *m;
; if (mode == GL_FRONT_AND_BACK) {
; p[1].i=GL_FRONT;
; glopMaterial(c,p);
; mode=GL_BACK;
; }
; if (mode == GL_FRONT) m=&c->materials[0];
; else m=&c->materials[1];
; switch(type) {
; case GL_EMISSION:
; for(i=0;i<4;i++)
; m->emission.v[i]=v[i];
; break;
; case GL_AMBIENT:
; for(i=0;i<4;i++)
; m->ambient.v[i]=v[i];
; break;
; case GL_DIFFUSE:
; for(i=0;i<4;i++)
; m->diffuse.v[i]=v[i];
; break;
; case GL_SPECULAR:
; for(i=0;i<4;i++)
; m->specular.v[i]=v[i];
; break;
; case GL_SHININESS:
; m->shininess=v[0];
; m->shininess_i = (v[0]/128.0f)*SPECULAR_BUFFER_RESOLUTION;
; break;
; case GL_AMBIENT_AND_DIFFUSE:
; for(i=0;i<4;i++)
; m->diffuse.v[i]=v[i];
; for(i=0;i<4;i++)
; m->ambient.v[i]=v[i];
; break;
; default:
; assert(0);
; }
ret
endp
align 4
proc glopColorMaterial uses eax ebx ecx, context:dword, p:dword
mov eax,[context]
mov ebx,[p]
mov ecx,[ebx+4] ;ecx = p[1]
mov dword[eax+offs_cont_current_color_material_mode],ecx
mov ecx,[ebx+8] ;ecx = p[2]
mov dword[eax+offs_cont_current_color_material_type],ecx
ret
endp
;void glopLight(GLContext *c,GLParam *p)
;{
; int light=p[1].i;
; int type=p[2].i;
; V4 v;
; GLLight *l;
; int i;
;
; assert(light >= GL_LIGHT0 && light < GL_LIGHT0+MAX_LIGHTS );
;
; l=&c->lights[light-GL_LIGHT0];
;
; for(i=0;i<4;i++) v.v[i]=p[3+i].f;
;
; switch(type) {
; case GL_AMBIENT:
; l->ambient=v;
; break;
; case GL_DIFFUSE:
; l->diffuse=v;
; break;
; case GL_SPECULAR:
; l->specular=v;
; break;
; case GL_POSITION:
; {
; V4 pos;
; gl_M4_MulV4(&pos,c->matrix_stack_ptr[0],&v);
;
; l->position=pos;
;
; if (l->position.v[3] == 0) {
; l->norm_position.X=pos.X;
; l->norm_position.Y=pos.Y;
; l->norm_position.Z=pos.Z;
;
; gl_V3_Norm(&l->norm_position);
; }
; }
; break;
; case GL_SPOT_DIRECTION:
; for(i=0;i<3;i++) {
; l->spot_direction.v[i]=v.v[i];
; l->norm_spot_direction.v[i]=v.v[i];
; }
; gl_V3_Norm(&l->norm_spot_direction);
; break;
; case GL_SPOT_EXPONENT:
; l->spot_exponent=v.v[0];
; break;
; case GL_SPOT_CUTOFF:
; {
; float a=v.v[0];
; assert(a == 180 || (a>=0 && a<=90));
; l->spot_cutoff=a;
; if (a != 180) l->cos_spot_cutoff=cos(a * M_PI / 180.0);
; }
; break;
; case GL_CONSTANT_ATTENUATION:
; l->attenuation[0]=v.v[0];
; break;
; case GL_LINEAR_ATTENUATION:
; l->attenuation[1]=v.v[0];
; break;
; case GL_QUADRATIC_ATTENUATION:
; l->attenuation[2]=v.v[0];
; break;
; default:
; assert(0);
; }
;}
align 4
proc glopLightModel uses ebx ecx esi edi, context:dword, p:dword
mov edi,[context]
mov ebx,[p]
mov esi,[ebx+8]
cmp dword[ebx+4],GL_LIGHT_MODEL_AMBIENT
jne @f
mov ecx,4
mov edi,dword[edi+offs_cont_ambient_light_model]
rep movsd ;for(i=0;i<4;i++) context.ambient_light_model.v[i]=v[i]
jmp .end_f
@@:
cmp dword[ebx+4],GL_LIGHT_MODEL_LOCAL_VIEWER
jne @f
fld dword[esi] ;st0 = p[2].v[0]
fistp dword[edi+offs_cont_local_light_model]
jmp .end_f
@@:
cmp dword[ebx+4],GL_LIGHT_MODEL_TWO_SIDE
jne @f
fld dword[esi] ;st0 = p[2].v[0]
fistp dword[edi+offs_cont_light_model_two_side]
jmp .end_f
@@: ;default:
; tgl_warning("glopLightModel: illegal pname: 0x%x\n", dword[ebx+4]);
; //assert(0);
.end_f:
ret
endp
;static inline float clampf(float a,float min,float max)
;{
; if (a<min) return min;
; else if (a>max) return max;
; else return a;
;}
align 4
proc gl_enable_disable_light uses eax ebx ecx, context:dword, light:dword, v:dword
mov eax,[context]
mov ebx,[light]
imul ebx,sizeof.GLLight
add ebx,[eax+offs_cont_lights]
xor ecx,ecx
cmp dword[ebx+offs_ligh_enabled],0
jne @f
not ecx
@@:
and ecx,[v]
cmp ecx,0
je @f
;if (v && !l.enabled)
mov dword[ebx+offs_ligh_enabled],1
mov ecx,[eax+offs_cont_first_light]
mov [ebx+offs_ligh_next],ecx
mov [eax+offs_cont_first_light],ebx ;context.first_light = l
mov dword[ebx+offs_ligh_prev],0 ;l.prev = NULL
jmp .end_f
@@:
xor ecx,ecx
cmp dword[v],0
jne @f
not ecx
@@:
and ecx,[ebx+offs_ligh_enabled]
cmp ecx,0
je .end_f
;else if (!v && l.enabled)
mov dword[ebx+offs_ligh_enabled],0 ;l.enabled = 0
mov ecx,[ebx+offs_ligh_next]
cmp dword[ebx+offs_ligh_prev],0 ;if (l.prev == NULL)
jne .els_0
mov [eax+offs_cont_first_light],ecx ;context.first_light = l.next
jmp @f
.els_0:
mov eax,[ebx+offs_ligh_prev]
mov [eax+offs_ligh_next],ecx ;l.prev.next = l.next
@@:
cmp dword[ebx+offs_ligh_next],0
je .end_f
mov ecx,[ebx+offs_ligh_prev]
mov eax,[ebx+offs_ligh_next]
mov [eax+offs_ligh_prev],ecx ;l.next.prev = l.prev
.end_f:
ret
endp
; non optimized lightening model
align 4
proc gl_shade_vertex, context:dword, v:dword
; float R,G,B,A;
; GLMaterial *m;
; GLLight *l;
; V3 n,s,d;
; float dist,tmp,att,dot,dot_spot,dot_spec;
; int twoside = c->light_model_two_side;
; m=&c->materials[0];
; n.X=v->normal.X;
; n.Y=v->normal.Y;
; n.Z=v->normal.Z;
; R=m->emission.v[0]+m->ambient.v[0]*c->ambient_light_model.v[0];
; G=m->emission.v[1]+m->ambient.v[1]*c->ambient_light_model.v[1];
; B=m->emission.v[2]+m->ambient.v[2]*c->ambient_light_model.v[2];
; A=clampf(m->diffuse.v[3],0,1);
; for(l=c->first_light;l!=NULL;l=l->next) {
; float lR,lB,lG;
; /* ambient */
; lR=l->ambient.v[0] * m->ambient.v[0];
; lG=l->ambient.v[1] * m->ambient.v[1];
; lB=l->ambient.v[2] * m->ambient.v[2];
; if (l->position.v[3] == 0) {
; /* light at infinity */
; d.X=l->position.v[0];
; d.Y=l->position.v[1];
; d.Z=l->position.v[2];
; att=1;
; } else {
; /* distance attenuation */
; d.X=l->position.v[0]-v->ec.v[0];
; d.Y=l->position.v[1]-v->ec.v[1];
; d.Z=l->position.v[2]-v->ec.v[2];
; dist=sqrt(d.X*d.X+d.Y*d.Y+d.Z*d.Z);
; if (dist>1E-3) {
; tmp=1/dist;
; d.X*=tmp;
; d.Y*=tmp;
; d.Z*=tmp;
; }
; att=1.0f/(l->attenuation[0]+dist*(l->attenuation[1]+
; dist*l->attenuation[2]));
; }
; dot=d.X*n.X+d.Y*n.Y+d.Z*n.Z;
; if (twoside && dot < 0) dot = -dot;
; if (dot>0) {
; /* diffuse light */
; lR+=dot * l->diffuse.v[0] * m->diffuse.v[0];
; lG+=dot * l->diffuse.v[1] * m->diffuse.v[1];
; lB+=dot * l->diffuse.v[2] * m->diffuse.v[2];
;
; /* spot light */
; if (l->spot_cutoff != 180) {
; dot_spot=-(d.X*l->norm_spot_direction.v[0]+
; d.Y*l->norm_spot_direction.v[1]+
; d.Z*l->norm_spot_direction.v[2]);
; if (twoside && dot_spot < 0) dot_spot = -dot_spot;
; if (dot_spot < l->cos_spot_cutoff) {
; /* no contribution */
; continue;
; } else {
; /* TODO: optimize */
; if (l->spot_exponent > 0) {
; att=att*pow(dot_spot,l->spot_exponent);
; }
; }
; }
; /* specular light */
; if (c->local_light_model) {
; V3 vcoord;
; vcoord.X=v->ec.X;
; vcoord.Y=v->ec.Y;
; vcoord.Z=v->ec.Z;
; gl_V3_Norm(&vcoord);
; s.X=d.X-vcoord.X;
; s.Y=d.Y-vcoord.X;
; s.Z=d.Z-vcoord.X;
; } else {
; s.X=d.X;
; s.Y=d.Y;
; s.Z=d.Z+1.0;
; }
; dot_spec=n.X*s.X+n.Y*s.Y+n.Z*s.Z;
; if (twoside && dot_spec < 0) dot_spec = -dot_spec;
; if (dot_spec>0) {
; GLSpecBuf *specbuf;
; int idx;
; tmp=sqrt(s.X*s.X+s.Y*s.Y+s.Z*s.Z);
; if (tmp > 1E-3) {
; dot_spec=dot_spec / tmp;
; }
; /* TODO: optimize */
; /* testing specular buffer code */
; /* dot_spec= pow(dot_spec,m->shininess);*/
; specbuf = specbuf_get_buffer(c, m->shininess_i, m->shininess);
; idx = (int)(dot_spec*SPECULAR_BUFFER_SIZE);
; if (idx > SPECULAR_BUFFER_SIZE) idx = SPECULAR_BUFFER_SIZE;
; dot_spec = specbuf->buf[idx];
; lR+=dot_spec * l->specular.v[0] * m->specular.v[0];
; lG+=dot_spec * l->specular.v[1] * m->specular.v[1];
; lB+=dot_spec * l->specular.v[2] * m->specular.v[2];
; }
; }
; R+=att * lR;
; G+=att * lG;
; B+=att * lB;
; }
; v->color.v[0]=clampf(R,0,1);
; v->color.v[1]=clampf(G,0,1);
; v->color.v[2]=clampf(B,0,1);
; v->color.v[3]=A;
ret
endp
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