Fix window shadows on Linux

Author: timothyschoen

Source/Standalone/PlugDataWindow.h

@@ -560,7 +560,7 @@ class PlugDataWindow final : public DocumentWindow
     void paint(Graphics& g) override
     {
         if (drawWindowShadow && !useNativeTitlebar() && !isMaximised()) {
-            StackShadow::drawShadowForRect(g, getLocalBounds().reduced(18, 17), 18, isActiveWindow() ? 0.42f : 0.20f, Corners::windowCornerRadius);
+            StackShadow::drawShadowForRect(g, getLocalBounds().reduced(20, 20), 18, Corners::windowCornerRadius, isActiveWindow() ? 0.42f : 0.2f);
         }
     }
 #endif

Source/Utility/StackShadow.cpp

@@ -244,7 +244,7 @@ StackShadow::RectShadowImage StackShadow::generateShadowImages(int radius, float
         }
         if (y < scaledEdgeH) {
             auto* edgeRow = edgeData.getLinePointer(y);
-            edgeRow[PixelARGB::indexA] = srcRow[cSize * 2];
+            edgeRow[PixelARGB::indexA] = srcRow[static_cast<int>(cSize * scale)];
         }
     }
     return imgs;
@@ -278,7 +278,7 @@ void StackShadow::drawShadowForRect(Graphics& g, Rectangle<int> bounds, int radi
     float const vEdgeRot = MathConstants<float>::halfPi;
 
     // Corners
-    g.drawImageAt(imgs.corner, bx - r, by - r);
+    g.drawImageTransformed(imgs.corner, AffineTransform::translation(bx - r, by - r));
     g.drawImageTransformed(imgs.corner, AffineTransform::scale(-1.0f, 1.0f).translated(bx + bw + r, by - r));
     g.drawImageTransformed(imgs.corner, AffineTransform::scale(1.0f, -1.0f).translated(bx - r, by + bh + r));
     g.drawImageTransformed(imgs.corner, AffineTransform::scale(-1.0f, -1.0f).translated(bx + bw + r, by + bh + r));