shithub: svg

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fix scaling and error handling

--- a/svg.c

+++ b/svg.c

@@ -17,10 +17,10 @@

 rasterize(int scale)

 {

 	NSVGimage *image;

-	struct NSVGrasterizer *rast;

+	NSVGrasterizer *rast;

 	uchar *data;

-	int w, h;

-	float s;

+	int w, h, sz;

+	float s, sx, sy, tx, ty;

 	Rectangle r;

 	image = nsvgParseFromFile(filename, "px", 96);

@@ -33,18 +33,25 @@

 		r = insetrect(screen->r, 10);

 		w = Dx(r);

 		h = Dy(r);

-		if(w < h)

-			s = (float)w/image->width;

-		else

-			s = (float)h/image->height;

+		sx = (float)w/(image->width+0.5);

+		sy = (float)h/(image->height+0.5);

+		s = (sx < sy) ? sx : sy;

 	}

 	rast = nsvgCreateRasterizer();

-	data = malloc(w*h*4);

+	if(rast==nil)

+		sysfatal("create rasterizer: %r");

+	sz = w*h*4;

+	data = malloc(sz);

+	if(data==nil)

+		sysfatal("malloc: %r");

 	nsvgRasterize(rast, image, 0, 0, s, data, w, h, w*4);

 	nsvgDelete(image);

 	nsvgDeleteRasterizer(rast);

 	svg = allocimage(display, Rect(0, 0, w, h), ABGR32, 0, DNofill);

-	loadimage(svg, svg->r, data, w*h*4);

+	if(svg==nil)

+		sysfatal("allocimage: %r");

+	if(loadimage(svg, svg->r, data, sz)<sz)

+		sysfatal("loadimage: %r");

 }

 void