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 {
  16 namespace dom {
  17
  18 class CanvasRenderingContext2D;
  19
  20 class CanvasGradient : public nsWrapperCache {
  21  public:
  22   NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(CanvasGradient)
  23   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(CanvasGradient)
  24
  25   enum class Type : uint8_t { LINEAR = 0, RADIAL, CONIC };
  26
  27   Type GetType() { return mType; }
  28
  29   already_AddRefed<mozilla::gfx::GradientStops> GetGradientStopsForTarget(
  30       mozilla::gfx::DrawTarget* aRT) {
  31     return gfx::gfxGradientCache::GetOrCreateGradientStops(
  32         aRT, mRawStops, gfx::ExtendMode::CLAMP);
  33   }
  34
  35   // WebIDL
  36   void AddColorStop(float offset, const nsACString& colorstr, ErrorResult& rv);
  37
  38   JSObject* WrapObject(JSContext* aCx,
  39                        JS::Handle<JSObject*> aGivenProto) override {
  40     return CanvasGradient_Binding::Wrap(aCx, this, aGivenProto);
  41   }
  42
  43   CanvasRenderingContext2D* GetParentObject() { return mContext; }
  44
  45  protected:
  46   friend struct CanvasBidiProcessor;
  47
  48   CanvasGradient(CanvasRenderingContext2D* aContext, Type aType);
  49
  50   virtual ~CanvasGradient();
  51
  52   RefPtr<CanvasRenderingContext2D> mContext;
  53   nsTArray<mozilla::gfx::GradientStop> mRawStops;
  54   Type mType;
  55 };
  56
  57 }  // namespace dom
  58 }  // namespace mozilla
  59
  60 #endif  // mozilla_dom_CanvasGradient_h