From: Chris Young <chris@unsatisfactorysoftware.co.uk>
Date: Sat, 5 Jan 2013 21:11:31 +0000 (+0000)
Subject: Explicitly check if r0 or r1 are NaN, as if they are, on x86 the function evaluates... 
X-Git-Url: https://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=3d74422216e1513bf651352a130ad49b9605bbf2;p=libsvgtiny.git

Explicitly check if r0 or r1 are NaN, as if they are, on x86 the function evaluates as 0 (which is already handled), but on PPC the function evaluates to a negative value, causing the following for loop to become infinite.
---

diff --git a/src/svgtiny_gradient.c b/src/svgtiny_gradient.c
index 002c322..e330024 100644
--- a/src/svgtiny_gradient.c
+++ b/src/svgtiny_gradient.c
@@ -462,7 +462,13 @@ svgtiny_code svgtiny_add_path_linear_gradient(float *p, unsigned int n,
 				gradient_norm_squared;
 
 		/* determine steps from change in r */
-		steps = ceilf(fabsf(r1 - r0) / 0.05);
+
+		if(isnan(r0) || isnan(r1)) {
+			steps = 1;
+		} else {
+			steps = ceilf(fabsf(r1 - r0) / 0.05);
+		}
+
 		if (steps == 0)
 			steps = 1;
 		fprintf(stderr, "r0 %g, r1 %g, steps %i\n",