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, 3 insertions, 3 deletions

diff --git a/tests/StreamTest.cpp b/tests/StreamTest.cpp
index 317451112d..2b86e7bca3 100644
--- a/tests/StreamTest.cpp
+++ b/tests/StreamTest.cpp
@@ -17,7 +17,7 @@
 
 #define MAX_SIZE    (256 * 1024)
 
-static void random_fill(SkRandom& rand, void* buffer, size_t size) {
+static void random_fill(SkMWCRandom& rand, void* buffer, size_t size) {
     char* p = (char*)buffer;
     char* stop = p + size;
     while (p < stop) {
@@ -26,7 +26,7 @@ static void random_fill(SkRandom& rand, void* buffer, size_t size) {
 }
 
 static void test_buffer(skiatest::Reporter* reporter) {
-    SkRandom rand;
+    SkMWCRandom rand;
     SkAutoMalloc am(MAX_SIZE * 2);
     char* storage = (char*)am.get();
     char* storage2 = storage + MAX_SIZE;
@@ -62,7 +62,7 @@ static void TestRStream(skiatest::Reporter* reporter) {
     static const char s[] =
         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
     char            copy[sizeof(s)];
-    SkRandom        rand;
+    SkMWCRandom        rand;
 
     for (int i = 0; i < 65; i++) {
         char*           copyPtr = copy;