ICU on windows

Change-Id: Ib1a2f017d96c5157c60d512332fddfef77c5ae8e
Reviewed-on: https://skia-review.googlesource.com/103001
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>

2 files changed, 82 insertions, 5 deletions

diff --git a/third_party/icu/BUILD.gn b/third_party/icu/BUILD.gn
index 68a5923cc6..6b2482f2fb 100644
--- a/third_party/icu/BUILD.gn
+++ b/third_party/icu/BUILD.gn
@@ -16,16 +16,17 @@ if (skia_use_system_icu) {
   }
 } else {
   third_party("icu") {
-    public_include_dirs = [ "../externals/icu/source/common" ]
+    public_include_dirs = [
+      "../externals/icu/source/common",
+      ".",
+    ]
     public_defines = [ "U_USING_ICU_NAMESPACE=0" ]
     configs -= [ "//gn:no_rtti" ]
-    if (!is_win) {
-      libs = [ "dl" ]
-    }
     defines = [
       # http://userguide.icu-project.org/howtouseicu
       "U_COMMON_IMPLEMENTATION",
       "U_STATIC_IMPLEMENTATION",
+      "U_ENABLE_DYLOAD=0",
     ]
     sources = [
       "../externals/icu/source/common/appendable.cpp",
@@ -209,6 +210,30 @@ if (skia_use_system_icu) {
       "../externals/icu/source/common/uvectr64.cpp",
       "../externals/icu/source/common/wintz.c",
     ]
-    sources += [ "../externals/icu/$current_os/icudtl_dat.S" ]
+    if (is_win) {
+      deps = [
+        ":icudata",
+      ]
+      public_defines += [
+        "U_NOEXCEPT=",
+        "U_STATIC_IMPLEMENTATION",
+      ]
+      libs = [ "Advapi32.lib" ]
+      sources += [ "../externals/icu/source/stubdata/stubdata.c" ]
+    } else {
+      sources += [ "../externals/icu/$current_os/icudtl_dat.S" ]
+      libs = [ "dl" ]
+    }
+  }
+  if (is_win) {
+    copy("icudata") {
+      sources = [
+        "../externals/icu/windows/icudt.dll",
+      ]
+      outputs = [
+        "$root_out_dir/icudt.dll",
+      ]
+      data = outputs
+    }
   }
 }
diff --git a/third_party/icu/SkLoadICU.h b/third_party/icu/SkLoadICU.h
new file mode 100644
index 0000000000..e28d629f1a
--- /dev/null
+++ b/third_party/icu/SkLoadICU.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef load_icu_DEFINED
+#define load_icu_DEFINED
+
+#include "SkTypes.h"
+
+#ifdef SK_BUILD_FOR_WIN
+
+#include "../private/SkLeanWindows.h"
+
+#include "unicode/uvernum.h"
+#include "unicode/udata.h"
+
+#define ICU_UTIL_DATA_SYMBOL "icudt" U_ICU_VERSION_SHORT "_dat"
+#define ICU_UTIL_DATA_SHARED_MODULE_NAME "icudt.dll"
+
+inline void SkLoadICU() {
+    HMODULE module = LoadLibrary(ICU_UTIL_DATA_SHARED_MODULE_NAME);
+    if (!module) {
+        SK_ABORT("Failed to load " ICU_UTIL_DATA_SHARED_MODULE_NAME "\n");
+    }
+    FARPROC addr = GetProcAddress(module, ICU_UTIL_DATA_SYMBOL);
+    if (!addr) {
+        SK_ABORT("Symbol " ICU_UTIL_DATA_SYMBOL " missing in "
+                 ICU_UTIL_DATA_SHARED_MODULE_NAME ".\n");
+    }
+    UErrorCode err = U_ZERO_ERROR;
+    udata_setCommonData(reinterpret_cast<void*>(addr), &err);
+    if (err != U_ZERO_ERROR) {
+        SkDebugf("udata_setCommonData() returned %d.\n", (int)err);
+        SK_ABORT("");
+    }
+    udata_setFileAccess(UDATA_ONLY_PACKAGES, &err);
+    if (err != U_ZERO_ERROR) {
+        SkDebugf("udata_setFileAccess() returned %d.\n", (int)err);
+        SK_ABORT("");
+    }
+}
+
+#undef ICU_UTIL_DATA_SHARED_MODULE_NAME
+#undef ICU_UTIL_DATA_SYMBOL
+
+#else
+inline void SkLoadICU() {}
+#endif  // SK_BUILD_FOR_WIN
+#endif  // load_icu_DEFINED
+