Support for Windows Transparency

trevorlinton · Jan 6, 2013 · e9ac9ef · e9ac9ef
1 parent 05572fb
commit e9ac9ef
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Showing 3 changed files with 18 additions and 3 deletions.
diff --git a/src/browser/native_window_win.cc b/src/browser/native_window_win.cc
@@ -42,6 +42,7 @@
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/native_widget_win.h"
 #include "ui/views/window/native_frame_view.h"
+#include <dwmapi.h>
 
 namespace nw {
 
@@ -242,6 +243,11 @@ NativeWindowWin::NativeWindowWin(content::Shell* shell,
       maximum_size_() {
   window_ = new views::Widget;
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_WINDOW);
+
+  bool transparent;
+  if(manifest->GetBoolean(switches::kmTransparent, &transparent) && transparent) 
+	params.type = views::Widget::InitParams::TYPE_WINDOW_FRAMELESS;
+
   params.delegate = this;
   params.remove_standard_frame = !has_frame();
   params.use_system_default_icon = true;
@@ -261,6 +267,11 @@ NativeWindowWin::NativeWindowWin(content::Shell* shell,
   window_->UpdateWindowIcon();
 
   OnViewWasResized();
+
+  if(transparent) {
+	MARGINS mgMarInset = { -1, -1, -1, -1 };
+	DwmExtendFrameIntoClientArea(window_->GetNativeWindow(), &mgMarInset);
+  }
 }
 
 NativeWindowWin::~NativeWindowWin() {

diff --git a/src/nw_shell.cc b/src/nw_shell.cc
@@ -374,9 +374,7 @@ void Shell::WebContentsCreated(WebContents* source_contents,
 
   manifest->SetBoolean(switches::kmResizable, features.resizable);
   manifest->SetBoolean(switches::kmFullscreen, features.fullscreen);
-  manifest->SetBoolean(switches::kmTransparent, features.transparent);
-  manifest->SetBoolean(switches::kmFrame, features.frame);
-  manifest->SetBoolean(switches::kmShadow, features.shadow);
+
   if (features.widthSet)
     manifest->SetInteger(switches::kmWidth, features.width);
   if (features.heightSet)

diff --git a/src/shell_content_browser_client.cc b/src/shell_content_browser_client.cc
@@ -166,6 +166,12 @@ void ShellContentBrowserClient::OverrideWebkitPrefs(
 
   // Force compositing mode to support transparency
   prefs->force_compositing_mode = true;
+  prefs->accelerated_2d_canvas_enabled = true;
+  prefs->accelerated_animation_enabled = true;
+  prefs->accelerated_compositing_enabled = true;
+  prefs->accelerated_filters_enabled = true;
+  prefs->accelerated_layers_enabled = true;
+  prefs->accelerated_painting_enabled = true;
 
   base::DictionaryValue* webkit;
   if (package->root()->GetDictionary(switches::kmWebkit, &webkit)) {