1 files changed, 79 insertions, 0 deletions
diff --git a/widget/ThemeDrawing.h b/widget/ThemeDrawing.h
new file mode 100644
index 0000000000..469c29ea2f
--- /dev/null
+++ b/widget/ThemeDrawing.h
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_widget_ThemeDrawing_h
+#define mozilla_widget_ThemeDrawing_h
+
+#include "mozilla/layers/IpcResourceUpdateQueue.h"
+#include "mozilla/layers/RenderRootStateManager.h"
+#include "mozilla/layers/StackingContextHelper.h"
+#include "RetainedDisplayListBuilder.h"
+
+namespace mozilla::widget {
+
+struct WebRenderBackendData {
+  wr::DisplayListBuilder& mBuilder;
+  wr::IpcResourceUpdateQueue& mResources;
+  const layers::StackingContextHelper& mSc;
+  layers::RenderRootStateManager* mManager;
+};
+
+class ThemeDrawing {
+ protected:
+  using DrawTarget = gfx::DrawTarget;
+  using sRGBColor = gfx::sRGBColor;
+  using DPIRatio = CSSToLayoutDeviceScale;
+
+ public:
+  virtual ~ThemeDrawing() = 0;
+
+  static void FillRect(DrawTarget&, const LayoutDeviceRect&, const sRGBColor&);
+  static void FillRect(WebRenderBackendData&, const LayoutDeviceRect&,
+                       const sRGBColor&);
+
+  // Returns the right scale for points in a aSize x aSize sized box, centered
+  // at 0x0 to fill aRect in the smaller dimension.
+  static float ScaleToFillRect(const LayoutDeviceRect& aRect,
+                               const float& aSize) {
+    return std::min(aRect.width, aRect.height) / aSize;
+  }
+
+  static LayoutDeviceIntCoord SnapBorderWidth(const CSSCoord& aCssWidth,
+                                              const DPIRatio& aDpiRatio);
+
+  static void PaintArrow(DrawTarget&, const LayoutDeviceRect&,
+                         const float aArrowPolygonX[],
+                         const float aArrowPolygonY[],
+                         const float aArrowPolygonSize,
+                         const int32_t aArrowNumPoints,
+                         const sRGBColor aFillColor);
+
+  static void PaintRoundedRectWithRadius(
+      DrawTarget&, const LayoutDeviceRect& aRect,
+      const LayoutDeviceRect& aClipRect, const sRGBColor& aBackgroundColor,
+      const sRGBColor& aBorderColor, const CSSCoord& aBorderWidth,
+      const CSSCoord& aRadius, const DPIRatio&);
+  static void PaintRoundedRectWithRadius(
+      WebRenderBackendData&, const LayoutDeviceRect& aRect,
+      const LayoutDeviceRect& aClipRect, const sRGBColor& aBackgroundColor,
+      const sRGBColor& aBorderColor, const CSSCoord& aBorderWidth,
+      const CSSCoord& aRadius, const DPIRatio&);
+  template <typename PaintBackendData>
+  static void PaintRoundedRectWithRadius(PaintBackendData& aData,
+                                         const LayoutDeviceRect& aRect,
+                                         const sRGBColor& aBackgroundColor,
+                                         const sRGBColor& aBorderColor,
+                                         const CSSCoord& aBorderWidth,
+                                         const CSSCoord& aRadius,
+                                         const DPIRatio& aDpiRatio) {
+    PaintRoundedRectWithRadius(aData, aRect, aRect, aBackgroundColor,
+                               aBorderColor, aBorderWidth, aRadius, aDpiRatio);
+  }
+};
+
+}  // namespace mozilla::widget
+
+#endif