Render SkiaWindow with scale factor

src/she/skia/skia_display.h

@@ -9,9 +9,9 @@ namespace she {
 class SkiaDisplay : public Display {
 public:
   SkiaDisplay(int width, int height, int scale)
-    : m_window(&m_queue, this)
-    , m_scale(scale) {
+    : m_window(&m_queue, this) {
     m_surface.create(width, height);
+    m_window.setScale(scale);
     m_window.setVisible(true);
   }
 
@@ -38,11 +38,11 @@ public:
   }
 
   void setScale(int scale) override {
-    m_scale = scale;
+    m_window.setScale(scale);
   }
 
   int scale() const override {
-    return m_scale;
+    return m_window.scale();
   }
 
   // Returns the main surface to draw into this display.
@@ -98,7 +98,6 @@ private:
   SkiaEventQueue m_queue;
   SkiaWindow m_window;
   SkiaSurface m_surface;
-  int m_scale;
 };
 
 } // namespace she

src/she/skia/skia_window.h

@@ -34,15 +34,14 @@ public:
 
     ASSERT(bitmap.width() * bitmap.bytesPerPixel() == bitmap.rowBytes());
     bitmap.lockPixels();
-    int ret = SetDIBitsToDevice(hdc,
-      0, 0,
-      bitmap.width(), bitmap.height(),
-      0, 0,
-      0, bitmap.height(),
+
+    int ret = StretchDIBits(hdc,
+      0, 0, bitmap.width()*scale(), bitmap.height()*scale(),
+      0, 0, bitmap.width(), bitmap.height(),
       bitmap.getPixels(),
-      &bmi,
-      DIB_RGB_COLORS);
+      &bmi, DIB_RGB_COLORS, SRCCOPY);
     (void)ret;
+
     bitmap.unlockPixels();
   }
 

src/she/win/window.h

@@ -310,6 +310,10 @@ static KeyScancode vkToScancode(int vk) {
       static_cast<T*>(this)->queueEventImpl(ev);
     }
 
+    int scale() const {
+      return m_scale;
+    }
+
     void setScale(int scale) {
       m_scale = scale;
     }