shithub: libgraphics

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render: fix a point rastering bug. add an initAbuf() procedure

--- a/render.c

+++ b/render.c

@@ -105,6 +105,16 @@

 }

 static void

+initAbuf(Framebuf *fb)

+{

+	if(fb->abuf.stk != nil)

+		return;

+

+	fb->abuf.stk = _emalloc(Dx(fb->r)*Dy(fb->r)*sizeof(Astk));

+	memset(fb->abuf.stk, 0, Dx(fb->r)*Dy(fb->r)*sizeof(Astk));

+}

+

+static void

 pushtoAbuf(Framebuf *fb, Point p, Color c, float z)

 {

 	Abuf *buf;

@@ -519,8 +529,9 @@

 		(*rasterfn[task->p.type])(task);

 		_delvattrs(&v);

-		for(i = 0; i < task->p.type+1; i++)

-			_delvattrs(&task->p.v[i]);

+		if(task->p.type != PPoint)

+			for(i = 0; i < task->p.type+1; i++)

+				_delvattrs(&task->p.v[i]);

 		free(params);

 		free(task);

 	}

@@ -867,11 +878,8 @@

 			continue;

 		}

-		/* initialize the A-buffer */

-		if((job->camera->rendopts & ROAbuff) && job->fb->abuf.stk == nil){

-			job->fb->abuf.stk = _emalloc(Dx(job->fb->r)*Dy(job->fb->r)*sizeof(Astk));

-			memset(job->fb->abuf.stk, 0, Dx(job->fb->r)*Dy(job->fb->r)*sizeof(Astk));

-		}

+		if((job->camera->rendopts & ROAbuff))

+			initAbuf(job->fb);

 		for(ent = sc->ents.next; ent != &sc->ents; ent = ent->next){

 			params = _emalloc(sizeof *params);