Add pinned versions of *ToFixed.

tests/MathTest.cpp

Index: tests/MathTest.cpp
diff --git a/tests/MathTest.cpp b/tests/MathTest.cpp
index 5bc2d0ebf7e204d6c6b2d6eec2286ecadb2bb808..a9bf9f04507c4a33a46bf4f151d26cb588e8f76f 100644
--- a/tests/MathTest.cpp
+++ b/tests/MathTest.cpp
@@ -5,6 +5,8 @@
  * found in the LICENSE file.
  */
 
+#include "float.h"
+
 #include "SkColorPriv.h"
 #include "SkEndian.h"
 #include "SkFloatBits.h"
@@ -696,3 +698,39 @@ DEF_TEST(divmod_s32, r) {
 DEF_TEST(divmod_s64, r) {
     test_divmod<int64_t>(r);
 }
+
+DEF_TEST(PinToFixed, reporter) {
+  // double
+  REPORTER_ASSERT(reporter, 0 == SkDoublePinToFixed(0.0));
+  REPORTER_ASSERT(reporter, 0x10000 == SkDoublePinToFixed(1.0));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFE == SkDoublePinToFixed(32767.999984741));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkDoublePinToFixed(32767.999984742));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkDoublePinToFixed(32767.999999999));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkDoublePinToFixed(32768.0));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkDoublePinToFixed(5e10));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkDoublePinToFixed(DBL_MAX));
+  REPORTER_ASSERT(reporter, -0x10000 == SkDoublePinToFixed(-1.0));
+  // SK_FixedMin is defined to be -SK_FixedMax
+  REPORTER_ASSERT(reporter, -0x7FFFFFFE == SkDoublePinToFixed(-32767.999984741));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkDoublePinToFixed(-32767.999984742));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkDoublePinToFixed(-32767.999999999));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkDoublePinToFixed(-32768.0));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkDoublePinToFixed(-5e10));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkDoublePinToFixed(-DBL_MAX));
+
+  // float
+  REPORTER_ASSERT(reporter, 0 == SkFloatPinToFixed(0.0f));
+  REPORTER_ASSERT(reporter, 0x10000 == SkFloatPinToFixed(1.0f));
+  REPORTER_ASSERT(reporter, 0x7FFFFF80 == SkFloatPinToFixed(32767.9990f));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkFloatPinToFixed(32767.9991f));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkFloatPinToFixed(32768.0f));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkFloatPinToFixed(5e10f));
+  REPORTER_ASSERT(reporter, 0x7FFFFFFF == SkFloatPinToFixed(FLT_MAX));
+  REPORTER_ASSERT(reporter, -0x10000 == SkFloatPinToFixed(-1.0f));
+  // SK_FixedMin is defined to be -SK_FixedMax
+  REPORTER_ASSERT(reporter, -0x7FFFFF80 == SkFloatPinToFixed(-32767.9990f));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkFloatPinToFixed(-32767.9991f));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkFloatPinToFixed(-32768.0f));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkFloatPinToFixed(-5e10f));
+  REPORTER_ASSERT(reporter, -0x7FFFFFFF == SkFloatPinToFixed(-FLT_MAX));
+}