TinyGL: Added gluDisk. Fixed args in gluCylinder and gluSphere (#223)

TinyGL:
- Fixed setting of `GL_FRONT_AND_BACK` mode;
- Fixed setting of `GL_SPOT_DIRECTION` angle;
- Optimization of drawing triangles and lines;
- Input parameters are adjusted to the OpenGL standard
  in `gluCylinder` and `gluSphere` functions;
- Added `gluDisk` function (the gluDisk function draws
  a disk-shaped quadric figure);
- Optimize function `calc_buf`.

Flag:
- Added lighting.

info3ds, info3ds_u, test_glu0, test_glu1, test_glu2,
textures0, textures1, textures2:
- Updated programs using `gluCylinder` and `gluSphere`.

Reviewed-on: #223
Reviewed-by: Ivan B <dunkaist@noreply.localhost>
Reviewed-by: Max Logaev <maxlogaev@proton.me>
Co-authored-by: IgorA <aie85playm@gmail.com>
Co-committed-by: IgorA <aie85playm@gmail.com>

programs/develop/libraries/TinyGL/asm_fork/ztriangle.inc

@@ -393,20 +393,9 @@ align 4
 		mov [dx1],eax ;dx1 = l2.x - l1.x
 		cmp edx,0 ;if (dy1 > 0) 
 		jle .els_3
-			xor edx,edx
-			cmp eax,0
-			jl .otr_dx1
 			shl eax,16
-			div dword[dy1] ;eax = (dx1 << 16) / dy1
-			jmp .end_3
-align 4
-			.otr_dx1:
-			neg eax
-			inc eax
-			shl eax,16
-			div dword[dy1] ;eax = (-dx1 << 16) / dy1
-			neg eax
-			inc eax
+			cdq
+			idiv dword[dy1] ;eax = (dx1 << 16) / dy1
 			jmp .end_3
 align 4
 		.els_3:
@@ -505,7 +494,6 @@ end if
 	.end_upd_l:
 
 	; compute values for the right edge
-
 	cmp dword[update_right],0 ;if(update_right)
 	je .end_upd_r
 		mov ebx,[pr1]
@@ -521,20 +509,9 @@ end if
 		mov [dy2],edx ;dy2 = pr2.y - pr1.y
 		cmp edx,0 ;if (dy2 > 0) 
 		jle .els_4
-			xor edx,edx
-			cmp eax,0
-			jl .otr_dx2
 			shl eax,16
-			div dword[dy2] ;eax = (dx2 << 16) / dy2
-			jmp .end_4
-align 4
-			.otr_dx2:
-			neg eax
-			inc eax ;dx2 *= -1
-			shl eax,16
-			div dword[dy2] ;eax = (-dx2 << 16) / dy2
-			neg eax
-			inc eax
+			cdq
+			idiv dword[dy2] ;eax = (dx2 << 16) / dy2
 			jmp .end_4
 align 4
 		.els_4: