Change random number generator for 'tests' to SkMWCRandom. Also removes some

unused headers and fixes a couple of bugs exposed by changing the random 
number generator:

First, the function SkMatrix::getMaxStretch() had an error where it was testing
the square of a number against near-zero. This led to it occasionally taking a
cheaper but imprecise path for computing the eigenvalues of the matrix. It's 
been replaced with a check against the square of SK_ScalarNearlyZero. 

The second case was a failure in ClipStackTest, where it hit the rare case of 
a practically empty clip stack (it has a single Union) and we set a tight 
bounds. The bounds rect doesn't get set by GrReducedClip::ReduceClipStack() in 
this case, so when it clips the reduced stack it's clipping against garbage, 
and the resulting regions don't match. The solution is to initialize the 
tightBounds rect.


git-svn-id: http://skia.googlecode.com/svn/trunk@7952 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/ColorTest.cpp b/tests/ColorTest.cpp
index a720ff4eac..c6e5485080 100644
--- a/tests/ColorTest.cpp
+++ b/tests/ColorTest.cpp
@@ -146,7 +146,7 @@ static inline void test_premul(skiatest::Reporter* reporter) {
 */
 /*
 static void test_interp(skiatest::Reporter* reporter) {
-    SkRandom r;
+    SkMWCRandom r;
 
     U8CPU a0 = 0;
     U8CPU a255 = 255;
@@ -163,7 +163,7 @@ static void test_interp(skiatest::Reporter* reporter) {
 */
 
 static inline void test_fast_interp(skiatest::Reporter* reporter) {
-    SkRandom r;
+    SkMWCRandom r;
 
     U8CPU a0 = 0;
     U8CPU a255 = 255;