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, 1 insertions, 1 deletions

diff --git a/tests/PackBitsTest.cpp b/tests/PackBitsTest.cpp
index f7d4b8e6b1..59c8a8cab9 100644
--- a/tests/PackBitsTest.cpp
+++ b/tests/PackBitsTest.cpp
@@ -14,7 +14,7 @@ static const uint16_t gTest2[] = { 0, 0, 0, 1, 2, 3, 3, 3 };
 static const uint16_t gTest3[] = { 0, 0, 0, 0, 0, 0, 1, 2, 3, 3, 3, 0, 0, 1 };
 
 #include "SkRandom.h"
-static SkRandom gRand;
+static SkMWCRandom gRand;
 static void rand_fill(uint16_t buffer[], int count) {
     for (int i = 0; i < count; i++)
         buffer[i] = (uint16_t)gRand.nextU();