shithub: tinyrend

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added a toon shader.

--- a/main.c

+++ b/main.c

@@ -394,7 +394,7 @@

 }

 Memimage *

-fragshader(FSparams *sp)

+gouraudshader(FSparams *sp)

 {

 	double intens;

@@ -409,6 +409,23 @@

 	return sp->frag;

 }

+Memimage *

+toonshader(FSparams *sp)

+{

+	double intens;

+

+	intens = sp->su->var_intensity[0]*sp->bc.x;

+	intens += sp->su->var_intensity[1]*sp->bc.y;

+	intens += sp->su->var_intensity[2]*sp->bc.z;

+	intens = intens > 0.85? 1: intens > 0.60? 0.80: intens > 0.45? 0.60: intens > 0.30? 0.45: intens > 0.15? 0.30: 0;

+	sp->cbuf[1] = 0;

+	sp->cbuf[2] = 155*intens;

+	sp->cbuf[3] = 255*intens;

+	memfillcolor(sp->frag, *(ulong*)sp->cbuf);

+

+	return sp->frag;

+}

+

 void

 rasterize(SUparams *params, Triangle3 st, Triangle2 tt, Memimage *frag)

 {

@@ -746,7 +763,7 @@

 	uvlong t0, t1;

 	t0 = nanosec();

-	shade(fb, vertshader, fragshader);

+	shade(fb, vertshader, toonshader);

 	t1 = nanosec();

 	fprint(2, "shader took %lludns\n", t1-t0);

 }