Break LCD and Bitmap text dependency on hardcoded atlas values

include/core/SkFloatingPoint.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkFloatingPoint_DEFINED
@@ skipping 140 matching lines @@
     // One step of Newton's method to refine.
     const float32x2_t estimate_sq = vmul_f32(estimate, estimate);
     estimate = vmul_f32(estimate, vrsqrts_f32(xx, estimate_sq));
     return vget_lane_f32(estimate, 0);  // 1 will work fine too; the answer's in both places.
 #else
     // Perhaps runtime-detected NEON, or a portable fallback.
     return SkOpts::rsqrt(x);
 #endif
 }
 
+// This is the number of significant digits we can print in a string such that when we read that
+// string back we get the floating point number we expect.  The minimum value C requires is 6, but
+// most compilers support 9
+#ifdef FLT_DECIMAL_DIG
+#define SK_FLT_DECIMAL_DIG FLT_DECIMAL_DIG
+#else
+#define SK_FLT_DECIMAL_DIG 9
 #endif
+
+#endif