widget/ThemeDrawing.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_widget_ThemeDrawing_h
   8 #define mozilla_widget_ThemeDrawing_h
   9
  10 #include "mozilla/layers/IpcResourceUpdateQueue.h"
  11 #include "mozilla/layers/RenderRootStateManager.h"
  12 #include "mozilla/layers/StackingContextHelper.h"
  13 #include "RetainedDisplayListBuilder.h"
  14
  15 namespace mozilla::widget {
  16
  17 struct WebRenderBackendData {
  18   wr::DisplayListBuilder& mBuilder;
  19   wr::IpcResourceUpdateQueue& mResources;
  20   const layers::StackingContextHelper& mSc;
  21   layers::RenderRootStateManager* mManager;
  22 };
  23
  24 class ThemeDrawing {
  25  protected:
  26   using DrawTarget = gfx::DrawTarget;
  27   using sRGBColor = gfx::sRGBColor;
  28   using DPIRatio = CSSToLayoutDeviceScale;
  29
  30  public:
  31   virtual ~ThemeDrawing() = 0;
  32
  33   static void FillRect(DrawTarget&, const LayoutDeviceRect&, const sRGBColor&);
  34   static void FillRect(WebRenderBackendData&, const LayoutDeviceRect&,
  35                        const sRGBColor&);
  36
  37   // Returns the right scale for points in a aSize x aSize sized box, centered
  38   // at 0x0 to fill aRect in the smaller dimension.
  39   static float ScaleToFillRect(const LayoutDeviceRect& aRect,
  40                                const float& aSize) {
  41     return std::min(aRect.width, aRect.height) / aSize;
  42   }
  43
  44   static LayoutDeviceIntCoord SnapBorderWidth(const CSSCoord& aCssWidth,
  45                                               const DPIRatio& aDpiRatio);
  46
  47   static void PaintArrow(DrawTarget&, const LayoutDeviceRect&,
  48                          const float aArrowPolygonX[],
  49                          const float aArrowPolygonY[],
  50                          const float aArrowPolygonSize,
  51                          const int32_t aArrowNumPoints,
  52                          const sRGBColor aFillColor);
  53
  54   static void PaintRoundedRectWithRadius(
  55       DrawTarget&, const LayoutDeviceRect& aRect,
  56       const LayoutDeviceRect& aClipRect, const sRGBColor& aBackgroundColor,
  57       const sRGBColor& aBorderColor, const CSSCoord& aBorderWidth,
  58       const CSSCoord& aRadius, const DPIRatio&);
  59   static void PaintRoundedRectWithRadius(
  60       WebRenderBackendData&, const LayoutDeviceRect& aRect,
  61       const LayoutDeviceRect& aClipRect, const sRGBColor& aBackgroundColor,
  62       const sRGBColor& aBorderColor, const CSSCoord& aBorderWidth,
  63       const CSSCoord& aRadius, const DPIRatio&);
  64   template <typename PaintBackendData>
  65   static void PaintRoundedRectWithRadius(PaintBackendData& aData,
  66                                          const LayoutDeviceRect& aRect,
  67                                          const sRGBColor& aBackgroundColor,
  68                                          const sRGBColor& aBorderColor,
  69                                          const CSSCoord& aBorderWidth,
  70                                          const CSSCoord& aRadius,
  71                                          const DPIRatio& aDpiRatio) {
  72     PaintRoundedRectWithRadius(aData, aRect, aRect, aBackgroundColor,
  73                                aBorderColor, aBorderWidth, aRadius, aDpiRatio);
  74   }
  75 };
  76
  77 }  // namespace mozilla::widget
  78
  79 #endif