Add SetScale to PPB_WidgetDev, use scale for painting

ppapi/cpp/dev/widget_dev.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/cpp/dev/widget_dev.h"
 
 #include "ppapi/c/dev/ppb_widget_dev.h"
 #include "ppapi/cpp/image_data.h"
 #include "ppapi/cpp/input_event.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/rect.h"
 #include "ppapi/cpp/module_impl.h"
 
 namespace pp {
 
 namespace {
 
-template <> const char* interface_name<PPB_Widget_Dev>() {
-  return PPB_WIDGET_DEV_INTERFACE;
+template <> const char* interface_name<PPB_Widget_Dev_0_3>() {
+  return PPB_WIDGET_DEV_INTERFACE_0_3;
+}
+
+template <> const char* interface_name<PPB_Widget_Dev_0_4>() {
+  return PPB_WIDGET_DEV_INTERFACE_0_4;
 }
 
 }  // namespace
 
 Widget_Dev::Widget_Dev(PP_Resource resource) : Resource(resource) {
 }
 
 Widget_Dev::Widget_Dev(const Widget_Dev& other) : Resource(other) {
 }
 
 bool Widget_Dev::Paint(const Rect& rect, ImageData* image) {
-  if (!has_interface<PPB_Widget_Dev>())
-    return false;
-  return PP_ToBool(get_interface<PPB_Widget_Dev>()->Paint(
-      pp_resource(), &rect.pp_rect(), image->pp_resource()));
+  if (has_interface<PPB_Widget_Dev_0_4>()) {
+    return PP_ToBool(get_interface<PPB_Widget_Dev_0_4>()->Paint(
+        pp_resource(), &rect.pp_rect(), image->pp_resource()));
+  } else if (has_interface<PPB_Widget_Dev_0_3>()) {
+    return PP_ToBool(get_interface<PPB_Widget_Dev_0_3>()->Paint(
+        pp_resource(), &rect.pp_rect(), image->pp_resource()));
+  }
+  return false;
 }
 
 bool Widget_Dev::HandleEvent(const InputEvent& event) {
-  if (!has_interface<PPB_Widget_Dev>())
-    return false;
-  return PP_ToBool(get_interface<PPB_Widget_Dev>()->HandleEvent(
-      pp_resource(), event.pp_resource()));
+  if (has_interface<PPB_Widget_Dev_0_4>()) {
+    return PP_ToBool(get_interface<PPB_Widget_Dev_0_4>()->HandleEvent(
+        pp_resource(), event.pp_resource()));
+  } else if (has_interface<PPB_Widget_Dev_0_3>()) {
+    return PP_ToBool(get_interface<PPB_Widget_Dev_0_3>()->HandleEvent(
+        pp_resource(), event.pp_resource()));
+  }
+  return false;
 }
 
 bool Widget_Dev::GetLocation(Rect* location) {
-  if (!has_interface<PPB_Widget_Dev>())
-    return false;
-  return PP_ToBool(get_interface<PPB_Widget_Dev>()->GetLocation(
-      pp_resource(), &location->pp_rect()));
+  if (has_interface<PPB_Widget_Dev_0_4>()) {
+    return PP_ToBool(get_interface<PPB_Widget_Dev_0_4>()->GetLocation(
+        pp_resource(), &location->pp_rect()));
+  } else if (has_interface<PPB_Widget_Dev_0_3>()) {
+    return PP_ToBool(get_interface<PPB_Widget_Dev_0_3>()->GetLocation(
+        pp_resource(), &location->pp_rect()));
+  }
+  return false;
 }
 
 void Widget_Dev::SetLocation(const Rect& location) {
-  if (has_interface<PPB_Widget_Dev>())
-    get_interface<PPB_Widget_Dev>()->SetLocation(pp_resource(),
-                                                 &location.pp_rect());
+  if (has_interface<PPB_Widget_Dev_0_4>()) {
+    get_interface<PPB_Widget_Dev_0_4>()->SetLocation(pp_resource(),
+                                                     &location.pp_rect());
+  } else if (has_interface<PPB_Widget_Dev_0_3>()) {
+    get_interface<PPB_Widget_Dev_0_3>()->SetLocation(pp_resource(),
+                                                     &location.pp_rect());
+  }
+}
+
+void Widget_Dev::SetScale(float scale) {
+  if (has_interface<PPB_Widget_Dev_0_4>())
+    get_interface<PPB_Widget_Dev_0_4>()->SetScale(pp_resource(), scale);
 }
 
 }  // namespace pp