ok: alias 565 -> sw:ct=565

This is mostly a demo, and to make sure it's easy.
If I'm thinking right, other non-ct options should Just Work.

Change-Id: I295db0fa04921ccdd766e1870e367594ca802462
Reviewed-on: https://skia-review.googlesource.com/10190
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

3 files changed, 12 insertions, 4 deletions

diff --git a/tools/ok.cpp b/tools/ok.cpp
index b6d25b840c..a922f87a16 100644
--- a/tools/ok.cpp
+++ b/tools/ok.cpp
@@ -364,7 +364,7 @@ Options::Options(std::string str) {
     std::string k,v, *curr = &k;
     for (auto c : str) {
         switch(c) {
-            case ',': this->kv[k] = v;
+            case ',': (*this)[k] = v;
                       curr = &(k = "");
                       break;
             case '=': curr = &(v = "");
@@ -372,9 +372,11 @@ Options::Options(std::string str) {
             default: *curr += c;
         }
     }
-    this->kv[k] = v;
+    (*this)[k] = v;
 }
 
+std::string& Options::operator[](std::string k) { return this->kv[k]; }
+
 std::string Options::operator()(std::string k, std::string fallback) const {
     for (auto it = kv.find(k); it != kv.end(); ) {
         return it->second;
diff --git a/tools/ok.h b/tools/ok.h
index e2a6a344ee..02bd939fc9 100644
--- a/tools/ok.h
+++ b/tools/ok.h
@@ -41,8 +41,9 @@ struct Dst {
 class Options {
     std::map<std::string, std::string> kv;
 public:
-    explicit Options(std::string str = "");
-    std::string operator()(std::string k, std::string fallback = "") const;
+    explicit Options(std::string = "");
+    std::string& operator[](std::string k);
+    std::string  operator()(std::string k, std::string fallback = "") const;
 };
 
 // Create globals to register your new type of Stream or Dst.
diff --git a/tools/ok_dsts.cpp b/tools/ok_dsts.cpp
index cc47ac4fbe..034ca4564d 100644
--- a/tools/ok_dsts.cpp
+++ b/tools/ok_dsts.cpp
@@ -33,3 +33,8 @@ struct SWDst : Dst {
     }
 };
 static Register sw{"sw", SWDst::Create};
+
+static Register _565{"565", [](Options options) {
+    options["ct"] = "565";
+    return SWDst::Create(options);
+}};