Support hidpi

support/hololens/ServoApp/ServoControl/OpenGLES.cpp

@@ -191,36 +191,7 @@ void OpenGLES::Reset() {
   Initialize();
 }
 
-// FIXME: simplify this. Duplicating code with CreateSurface(SwapChainPanel)
-EGLSurface
-OpenGLES::CreateSurface(winrt::Windows::UI::Core::CoreWindow const &cwin) {
-  EGLSurface surface = EGL_NO_SURFACE;
-
-  const EGLint surfaceAttributes[] = {EGL_ANGLE_SURFACE_RENDER_TO_BACK_BUFFER,
-                                      EGL_TRUE, EGL_NONE};
-
-  PropertySet surfaceCreationProperties;
-
-  surfaceCreationProperties.Insert(EGLNativeWindowTypeProperty, cwin);
-  // How to set size and or scale:
-  // Insert(EGLRenderSurfaceSizeProperty),
-  // PropertyValue::CreateSize(*renderSurfaceSize));
-  // Insert(EGLRenderResolutionScaleProperty),
-  // PropertyValue::CreateSingle(*resolutionScale));
-
-  EGLNativeWindowType win = static_cast<EGLNativeWindowType>(
-      winrt::get_abi(surfaceCreationProperties));
-  surface =
-      eglCreateWindowSurface(mEglDisplay, mEglConfig, win, surfaceAttributes);
-
-  if (surface == EGL_NO_SURFACE) {
-    throw winrt::hresult_error(E_FAIL, L"Failed to create EGL surface");
-  }
-
-  return surface;
-}
-
-EGLSurface OpenGLES::CreateSurface(SwapChainPanel const &panel) {
+EGLSurface OpenGLES::CreateSurface(SwapChainPanel const &panel, float dpi) {
   EGLSurface surface = EGL_NO_SURFACE;
 
   const EGLint surfaceAttributes[] = {EGL_ANGLE_SURFACE_RENDER_TO_BACK_BUFFER,
@@ -232,8 +203,8 @@ EGLSurface OpenGLES::CreateSurface(SwapChainPanel const &panel) {
   // How to set size and or scale:
   // Insert(EGLRenderSurfaceSizeProperty),
   // PropertyValue::CreateSize(*renderSurfaceSize));
-  // Insert(EGLRenderResolutionScaleProperty),
-  // PropertyValue::CreateSingle(*resolutionScale));
+  surfaceCreationProperties.Insert(EGLRenderResolutionScaleProperty,
+                                   PropertyValue::CreateSingle(dpi));
 
   EGLNativeWindowType win = static_cast<EGLNativeWindowType>(
       winrt::get_abi(surfaceCreationProperties));

support/hololens/ServoApp/ServoControl/OpenGLES.h

@@ -10,8 +10,8 @@ class OpenGLES {
   ~OpenGLES();
 
   EGLSurface
-  CreateSurface(winrt::Windows::UI::Xaml::Controls::SwapChainPanel const &);
-  EGLSurface CreateSurface(winrt::Windows::UI::Core::CoreWindow const &);
+  CreateSurface(winrt::Windows::UI::Xaml::Controls::SwapChainPanel const &,
+                float dpi);
 
   void GetSurfaceDimensions(const EGLSurface surface, EGLint *width,
                             EGLint *height);

support/hololens/ServoApp/ServoControl/Servo.cpp

@@ -56,7 +56,7 @@ const char* get_clipboard_contents() {
   return nullptr;
 }
 
-Servo::Servo(hstring url, GLsizei width, GLsizei height,
+Servo::Servo(hstring url, GLsizei width, GLsizei height, float dpi,
              ServoDelegate &aDelegate)
     : mWindowHeight(height), mWindowWidth(width), mDelegate(aDelegate) {
 
@@ -65,7 +65,7 @@ Servo::Servo(hstring url, GLsizei width, GLsizei height,
   o.url = *hstring2char(url);
   o.width = mWindowWidth;
   o.height = mWindowHeight;
-  o.density = 1.0;
+  o.density = dpi;
   o.enable_subpixel_text_antialiasing = false;
   o.vr_pointer = NULL;
 

support/hololens/ServoApp/ServoControl/Servo.h

@@ -43,7 +43,7 @@ class ServoDelegate {
 
 class Servo {
 public:
-  Servo(hstring, GLsizei, GLsizei, ServoDelegate &);
+  Servo(hstring, GLsizei, GLsizei, float, ServoDelegate &);
   ~Servo();
   ServoDelegate &Delegate() { return mDelegate; }
 

support/hololens/ServoApp/ServoControl/ServoControl.cpp

@@ -4,6 +4,7 @@
 #include <stdlib.h>
 
 using namespace std::placeholders;
+using namespace winrt::Windows::Graphics::Display;
 using namespace winrt::Windows::UI::Xaml;
 using namespace winrt::Windows::UI::Core;
 using namespace winrt::Windows::Foundation;
@@ -13,6 +14,7 @@ using namespace winrt::servo;
 namespace winrt::ServoApp::implementation {
 
 ServoControl::ServoControl() {
+  mDPI = (float)DisplayInformation::GetForCurrentView().ResolutionScale() / 100;
   DefaultStyleKey(winrt::box_value(L"ServoApp.ServoControl"));
   Loaded(std::bind(&ServoControl::OnLoaded, this, _1, _2));
 }
@@ -49,7 +51,7 @@ Controls::SwapChainPanel ServoControl::Panel() {
 
 void ServoControl::CreateRenderSurface() {
   if (mRenderSurface == EGL_NO_SURFACE) {
-    mRenderSurface = mOpenGLES.CreateSurface(Panel());
+    mRenderSurface = mOpenGLES.CreateSurface(Panel(), mDPI);
   }
 }
 
@@ -68,19 +70,19 @@ void ServoControl::RecoverFromLostDevice() {
 
 void ServoControl::OnSurfaceManipulationDelta(
     IInspectable const &, Input::ManipulationDeltaRoutedEventArgs const &e) {
-  auto x = e.Position().X;
-  auto y = e.Position().Y;
-  auto dx = e.Delta().Translation.X;
-  auto dy = e.Delta().Translation.Y;
+  auto x = e.Position().X * mDPI;
+  auto y = e.Position().Y * mDPI;
+  auto dx = e.Delta().Translation.X * mDPI;
+  auto dy = e.Delta().Translation.Y * mDPI;
   RunOnGLThread([=] { mServo->Scroll(dx, dy, x, y); });
   e.Handled(true);
 }
 
 void ServoControl::OnSurfaceClicked(IInspectable const &,
                                     Input::PointerRoutedEventArgs const &e) {
   auto coords = e.GetCurrentPoint(Panel());
-  auto x = coords.Position().X;
-  auto y = coords.Position().Y;
+  auto x = coords.Position().X * mDPI;
+  auto y = coords.Position().Y * mDPI;
   RunOnGLThread([=] { mServo->Click(x, y); });
   e.Handled(true);
 }
@@ -140,7 +142,7 @@ void ServoControl::Loop() {
   if (mServo == nullptr) {
     log("Entering loop");
     ServoDelegate *sd = static_cast<ServoDelegate *>(this);
-    mServo = std::make_unique<Servo>(mInitialURL, panelWidth, panelHeight, *sd);
+    mServo = std::make_unique<Servo>(mInitialURL, panelWidth, panelHeight, mDPI, *sd);
   } else {
     // FIXME: this will fail since create_task didn't pick the thread
     // where Servo was running initially.

support/hololens/ServoApp/ServoControl/ServoControl.h

@@ -64,6 +64,7 @@ struct ServoControl : ServoControlT<ServoControl>, public servo::ServoDelegate {
   winrt::event<HistoryChangedDelegate> mOnHistoryChangedEvent;
   winrt::event<LoadStatusChangedDelegate> mOnLoadStartedEvent;
   winrt::event<LoadStatusChangedDelegate> mOnLoadEndedEvent;
+  float mDPI = 1;
   hstring mInitialURL = L"https://servo.org";
 
   Windows::UI::Xaml::Controls::SwapChainPanel ServoControl::Panel();