import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/layers/basic/BasicLayersImpl.h

@@ -0,0 +1,151 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 GFX_BASICLAYERSIMPL_H
+#define GFX_BASICLAYERSIMPL_H
+
+#include "BasicImplData.h"              // for BasicImplData
+#include "BasicLayers.h"                // for BasicLayerManager
+#include "ReadbackLayer.h"              // for ReadbackLayer
+#include "gfxContext.h"                 // for gfxContext, etc
+#include "mozilla/Attributes.h"         // for MOZ_STACK_CLASS
+#include "mozilla/Maybe.h"              // for Maybe
+#include "nsDebug.h"                    // for NS_ASSERTION
+#include "nsISupportsImpl.h"            // for gfxContext::Release, etc
+#include "nsRegion.h"                   // for nsIntRegion
+
+namespace mozilla {
+namespace gfx {
+class DrawTarget;
+} // namespace gfx
+
+namespace layers {
+
+class AutoMoz2DMaskData;
+class Layer;
+
+class AutoSetOperator {
+  typedef mozilla::gfx::CompositionOp CompositionOp;
+public:
+  AutoSetOperator(gfxContext* aContext, CompositionOp aOperator) {
+    if (aOperator != CompositionOp::OP_OVER) {
+      aContext->SetOp(aOperator);
+      mContext = aContext;
+    }
+  }
+  ~AutoSetOperator() {
+    if (mContext) {
+      mContext->SetOp(CompositionOp::OP_OVER);
+    }
+  }
+private:
+  RefPtr<gfxContext> mContext;
+};
+
+class BasicReadbackLayer : public ReadbackLayer,
+                           public BasicImplData
+{
+public:
+  explicit BasicReadbackLayer(BasicLayerManager* aLayerManager) :
+    ReadbackLayer(aLayerManager, static_cast<BasicImplData*>(this))
+  {
+    MOZ_COUNT_CTOR(BasicReadbackLayer);
+  }
+
+protected:
+  virtual ~BasicReadbackLayer()
+  {
+    MOZ_COUNT_DTOR(BasicReadbackLayer);
+  }
+
+public:
+  virtual void SetVisibleRegion(const LayerIntRegion& aRegion)
+  {
+    NS_ASSERTION(BasicManager()->InConstruction(),
+                 "Can only set properties in construction phase");
+    ReadbackLayer::SetVisibleRegion(aRegion);
+  }
+
+protected:
+  BasicLayerManager* BasicManager()
+  {
+    return static_cast<BasicLayerManager*>(mManager);
+  }
+};
+
+/*
+ * Extract a mask surface for a mask layer
+ * Returns true and through outparams a surface for the mask layer if
+ * a mask layer is present and has a valid surface and transform;
+ * false otherwise.
+ * The transform for the layer will be put in aMaskData
+ */
+bool
+GetMaskData(Layer* aMaskLayer,
+            const gfx::Point& aDeviceOffset,
+            AutoMoz2DMaskData* aMaskData);
+
+already_AddRefed<gfx::SourceSurface> GetMaskForLayer(Layer* aLayer, gfx::Matrix* aMaskTransform);
+
+// Paint the current source to a context using a mask, if present
+void
+PaintWithMask(gfxContext* aContext, float aOpacity, Layer* aMaskLayer);
+
+// Fill the rect with the source, using a mask and opacity, if present
+void
+FillRectWithMask(gfx::DrawTarget* aDT,
+                 const gfx::Rect& aRect,
+                 const gfx::Color& aColor,
+                 const gfx::DrawOptions& aOptions,
+                 gfx::SourceSurface* aMaskSource = nullptr,
+                 const gfx::Matrix* aMaskTransform = nullptr);
+void
+FillRectWithMask(gfx::DrawTarget* aDT,
+                 const gfx::Rect& aRect,
+                 gfx::SourceSurface* aSurface,
+                 gfx::SamplingFilter aSamplingFilter,
+                 const gfx::DrawOptions& aOptions,
+                 gfx::ExtendMode aExtendMode,
+                 gfx::SourceSurface* aMaskSource = nullptr,
+                 const gfx::Matrix* aMaskTransform = nullptr,
+                 const gfx::Matrix* aSurfaceTransform = nullptr);
+void
+FillRectWithMask(gfx::DrawTarget* aDT,
+                 const gfx::Point& aDeviceOffset,
+                 const gfx::Rect& aRect,
+                 gfx::SourceSurface* aSurface,
+                 gfx::SamplingFilter aSamplingFilter,
+                 const gfx::DrawOptions& aOptions,
+                 Layer* aMaskLayer);
+void
+FillRectWithMask(gfx::DrawTarget* aDT,
+                 const gfx::Point& aDeviceOffset,
+                 const gfx::Rect& aRect,
+                 const gfx::Color& aColor,
+                 const gfx::DrawOptions& aOptions,
+                 Layer* aMaskLayer);
+
+BasicImplData*
+ToData(Layer* aLayer);
+
+/**
+ * Returns the operator to be used when blending and compositing this layer.
+ * Currently there is no way to specify both a blending and a compositing
+ * operator other than normal and source over respectively.
+ *
+ * If the layer has
+ * an effective blend mode operator other than normal, as returned by
+ * GetEffectiveMixBlendMode, this operator is used for blending, and source
+ * over is used for compositing.
+ * If the blend mode for this layer is normal, the compositing operator
+ * returned by GetOperator is used.
+ */
+gfx::CompositionOp
+GetEffectiveOperator(Layer* aLayer);
+
+} // namespace layers
+} // namespace mozilla
+
+#endif