From 2fbd4068bde6a9fb50341c0bdfbb8bf18b70d015 Mon Sep 17 00:00:00 2001
From: joshualitt <joshualitt@chromium.org>
Date: Thu, 7 May 2015 13:06:41 -0700
Subject: tesselating path renderer unit tests

BUG=skia:

Review URL: https://codereview.chromium.org/1127183006
---
 src/gpu/GrTestUtils.cpp | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

(limited to 'src/gpu/GrTestUtils.cpp')

diff --git a/src/gpu/GrTestUtils.cpp b/src/gpu/GrTestUtils.cpp
index 163fb56389..0bb4044eaa 100644
--- a/src/gpu/GrTestUtils.cpp
+++ b/src/gpu/GrTestUtils.cpp
@@ -12,9 +12,9 @@
 
 #ifdef GR_TEST_UTILS
 
-namespace GrTest {
-const SkMatrix& TestMatrix(SkRandom* random) {
+static const SkMatrix& test_matrix(SkRandom* random, bool includePerspective) {
     static SkMatrix gMatrices[5];
+    static const int kPerspectiveCount = 1;
     static bool gOnce;
     if (!gOnce) {
         gOnce = true;
@@ -24,13 +24,24 @@ const SkMatrix& TestMatrix(SkRandom* random) {
         gMatrices[3].setRotate(SkIntToScalar(185));
         gMatrices[3].postTranslate(SkIntToScalar(66), SkIntToScalar(-33));
         gMatrices[3].postScale(SkIntToScalar(2), SK_ScalarHalf);
+
+        // Perspective matrices
         gMatrices[4].setRotate(SkIntToScalar(215));
         gMatrices[4].set(SkMatrix::kMPersp0, 0.00013f);
         gMatrices[4].set(SkMatrix::kMPersp1, -0.000039f);
     }
-    return gMatrices[random->nextULessThan(static_cast<uint32_t>(SK_ARRAY_COUNT(gMatrices)))];
+
+    uint32_t count = static_cast<uint32_t>(SK_ARRAY_COUNT(gMatrices));
+    if (includePerspective) {
+        return gMatrices[random->nextULessThan(count)];
+    } else {
+        return gMatrices[random->nextULessThan(count - kPerspectiveCount)];
+    }
 }
 
+namespace GrTest {
+const SkMatrix& TestMatrix(SkRandom* random) { return test_matrix(random, true); }
+
 const SkMatrix& TestMatrixPreservesRightAngles(SkRandom* random) {
     static SkMatrix gMatrices[5];
     static bool gOnce;
@@ -83,6 +94,8 @@ const SkMatrix& TestMatrixRectStaysRect(SkRandom* random) {
     return gMatrices[random->nextULessThan(static_cast<uint32_t>(SK_ARRAY_COUNT(gMatrices)))];
 }
 
+const SkMatrix& TestMatrixInvertible(SkRandom* random) { return test_matrix(random, false); }
+
 const SkRect& TestRect(SkRandom* random) {
     static SkRect gRects[7];
     static bool gOnce;
-- 
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