dom/canvas/CanvasGradient.h

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   3  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #ifndef mozilla_dom_CanvasGradient_h
   6 #define mozilla_dom_CanvasGradient_h
   7
   8 #include "nsTArray.h"
   9 #include "mozilla/RefPtr.h"
  10 #include "mozilla/dom/CanvasRenderingContext2DBinding.h"
  11 #include "mozilla/gfx/2D.h"
  12 #include "nsWrapperCache.h"
  13 #include "gfxGradientCache.h"
  14
  15 namespace mozilla::dom {
  16
  17 class CanvasRenderingContext2D;
  18
  19 class CanvasGradient : public nsWrapperCache {
  20  public:
  21   NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(CanvasGradient)
  22   NS_DECL_CYCLE_COLLECTION_NATIVE_WRAPPERCACHE_CLASS(CanvasGradient)
  23
  24   enum class Type : uint8_t { LINEAR = 0, RADIAL, CONIC };
  25
  26   Type GetType() { return mType; }
  27
  28   already_AddRefed<mozilla::gfx::GradientStops> GetGradientStopsForTarget(
  29       mozilla::gfx::DrawTarget* aRT) {
  30     return gfx::gfxGradientCache::GetOrCreateGradientStops(
  31         aRT, mRawStops, gfx::ExtendMode::CLAMP);
  32   }
  33
  34   // WebIDL
  35   void AddColorStop(float offset, const nsACString& colorstr, ErrorResult& rv);
  36
  37   JSObject* WrapObject(JSContext* aCx,
  38                        JS::Handle<JSObject*> aGivenProto) override {
  39     return CanvasGradient_Binding::Wrap(aCx, this, aGivenProto);
  40   }
  41
  42   CanvasRenderingContext2D* GetParentObject() { return mContext; }
  43
  44  protected:
  45   friend struct CanvasBidiProcessor;
  46
  47   CanvasGradient(CanvasRenderingContext2D* aContext, Type aType);
  48
  49   virtual ~CanvasGradient();
  50
  51   RefPtr<CanvasRenderingContext2D> mContext;
  52   nsTArray<mozilla::gfx::GradientStop> mRawStops;
  53   Type mType;
  54 };
  55
  56 }  // namespace mozilla::dom
  57
  58 #endif  // mozilla_dom_CanvasGradient_h