Re-re-land "added GrSkSLFP and converted DitherEffect to use it"

This reverts commit 6c48e4d11ce80fa5cfef56e13b2d5847fe94a7cc.

Bug: skia:
Change-Id: I7ee78990fc30eec545d1856e59eb6e0573089426
Reviewed-on: https://skia-review.googlesource.com/144348
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/src/sksl/SkSLString.cpp b/src/sksl/SkSLString.cpp
index 125dabb335..292cef5159 100644
--- a/src/sksl/SkSLString.cpp
+++ b/src/sksl/SkSLString.cpp
@@ -210,10 +210,22 @@ String to_string(double value) {
 #endif
 #define MAX_DOUBLE_CHARS 25
     char buffer[MAX_DOUBLE_CHARS];
-    SkDEBUGCODE(int len = )SNPRINTF(buffer, sizeof(buffer), "%.17g", value);
+    int len = SNPRINTF(buffer, sizeof(buffer), "%.17g", value);
     SkASSERT(len < MAX_DOUBLE_CHARS);
+    bool needsDotZero = true;
+    for (int i = 0; i < len; ++i) {
+        char c = buffer[i];
+        if (c == ',') {
+            buffer[i] = '.';
+            needsDotZero = false;
+            break;
+        } else if (c == '.' || c == 'e') {
+            needsDotZero = false;
+            break;
+        }
+    }
     String result(buffer);
-    if (!strchr(buffer, '.') && !strchr(buffer, 'e')) {
+    if (needsDotZero) {
         result += ".0";
     }
     return result;