1 files changed, 250 insertions, 0 deletions
diff --git a/gfx/layers/LayersTypes.h b/gfx/layers/LayersTypes.h
new file mode 100644
index 000000000..8d52ed2fd
--- /dev/null
+++ b/gfx/layers/LayersTypes.h
@@ -0,0 +1,250 @@
+/* -*- 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_LAYERSTYPES_H
+#define GFX_LAYERSTYPES_H
+
+#include <stdint.h>                     // for uint32_t
+
+#include "Units.h"
+#include "mozilla/gfx/Point.h"          // for IntPoint
+#include "mozilla/TypedEnumBits.h"
+#include "nsRegion.h"
+
+#include <stdio.h>            // FILE
+#include "mozilla/Logging.h"            // for PR_LOG
+
+#ifndef MOZ_LAYERS_HAVE_LOG
+#  define MOZ_LAYERS_HAVE_LOG
+#endif
+#define MOZ_LAYERS_LOG(_args)                             \
+  MOZ_LOG(LayerManager::GetLog(), LogLevel::Debug, _args)
+#define MOZ_LAYERS_LOG_IF_SHADOWABLE(layer, _args)         \
+  do { if (layer->AsShadowableLayer()) { MOZ_LOG(LayerManager::GetLog(), LogLevel::Debug, _args); } } while (0)
+
+#define INVALID_OVERLAY -1
+
+namespace android {
+class MOZ_EXPORT GraphicBuffer;
+} // namespace android
+
+namespace mozilla {
+namespace layers {
+
+class TextureHost;
+
+#undef NONE
+#undef OPAQUE
+
+enum class LayersBackend : int8_t {
+  LAYERS_NONE = 0,
+  LAYERS_BASIC,
+  LAYERS_OPENGL,
+  LAYERS_D3D9,
+  LAYERS_D3D11,
+  LAYERS_CLIENT,
+  LAYERS_LAST
+};
+
+enum class BufferMode : int8_t {
+  BUFFER_NONE,
+  BUFFERED
+};
+
+enum class DrawRegionClip : int8_t {
+  DRAW,
+  NONE
+};
+
+enum class SurfaceMode : int8_t {
+  SURFACE_NONE = 0,
+  SURFACE_OPAQUE,
+  SURFACE_SINGLE_CHANNEL_ALPHA,
+  SURFACE_COMPONENT_ALPHA
+};
+
+// LayerRenderState for Composer2D
+// We currently only support Composer2D using gralloc. If we want to be backed
+// by other surfaces we will need a more generic LayerRenderState.
+enum class LayerRenderStateFlags : int8_t {
+  LAYER_RENDER_STATE_DEFAULT = 0,
+  ORIGIN_BOTTOM_LEFT = 1 << 0,
+  BUFFER_ROTATION = 1 << 1,
+  // Notify Composer2D to swap the RB pixels of gralloc buffer
+  FORMAT_RB_SWAP = 1 << 2,
+  // We record opaqueness here alongside the actual surface we're going to
+  // render. This avoids confusion when a layer might return different kinds
+  // of surfaces over time (e.g. video frames).
+  OPAQUE = 1 << 3
+};
+MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(LayerRenderStateFlags)
+
+struct LayerRenderState {
+  // Constructors and destructor are defined in LayersTypes.cpp so we don't
+  // have to pull in a definition for GraphicBuffer.h here. In KK at least,
+  // that results in nasty pollution such as libui's hardware.h #defining
+  // 'version_major' and 'version_minor' which conflict with Theora's codec.c...
+  LayerRenderState();
+  LayerRenderState(const LayerRenderState& aOther);
+  ~LayerRenderState();
+
+  void SetOffset(const nsIntPoint& aOffset)
+  {
+    mOffset = aOffset;
+    mHasOwnOffset = true;
+  }
+
+  // see LayerRenderStateFlags
+  LayerRenderStateFlags mFlags;
+  // true if mOffset is applicable
+  bool mHasOwnOffset;
+  // the location of the layer's origin on mSurface
+  nsIntPoint mOffset;
+};
+
+enum class ScaleMode : int8_t {
+  SCALE_NONE,
+  STRETCH,
+  SENTINEL
+// Unimplemented - PRESERVE_ASPECT_RATIO_CONTAIN
+};
+
+struct EventRegions {
+  // The hit region for a layer contains all areas on the layer that are
+  // sensitive to events. This region is an over-approximation and may
+  // contain regions that are not actually sensitive, but any such regions
+  // will be included in the mDispatchToContentHitRegion.
+  nsIntRegion mHitRegion;
+  // The mDispatchToContentHitRegion for a layer contains all areas for
+  // which the main-thread must be consulted before responding to events.
+  // This region will be a subregion of mHitRegion.
+  nsIntRegion mDispatchToContentHitRegion;
+
+  // The following regions represent the touch-action areas of this layer.
+  // All of these regions are approximations to the true region, but any
+  // variance between the approximation and the true region is guaranteed
+  // to be included in the mDispatchToContentHitRegion.
+  nsIntRegion mNoActionRegion;
+  nsIntRegion mHorizontalPanRegion;
+  nsIntRegion mVerticalPanRegion;
+
+  EventRegions()
+  {
+  }
+
+  explicit EventRegions(nsIntRegion aHitRegion)
+    : mHitRegion(aHitRegion)
+  {
+  }
+
+  bool operator==(const EventRegions& aRegions) const
+  {
+    return mHitRegion == aRegions.mHitRegion &&
+           mDispatchToContentHitRegion == aRegions.mDispatchToContentHitRegion &&
+           mNoActionRegion == aRegions.mNoActionRegion &&
+           mHorizontalPanRegion == aRegions.mHorizontalPanRegion &&
+           mVerticalPanRegion == aRegions.mVerticalPanRegion;
+  }
+  bool operator!=(const EventRegions& aRegions) const
+  {
+    return !(*this == aRegions);
+  }
+
+  void ApplyTranslationAndScale(float aXTrans, float aYTrans, float aXScale, float aYScale)
+  {
+    mHitRegion.ScaleRoundOut(aXScale, aYScale);
+    mDispatchToContentHitRegion.ScaleRoundOut(aXScale, aYScale);
+    mNoActionRegion.ScaleRoundOut(aXScale, aYScale);
+    mHorizontalPanRegion.ScaleRoundOut(aXScale, aYScale);
+    mVerticalPanRegion.ScaleRoundOut(aXScale, aYScale);
+
+    mHitRegion.MoveBy(aXTrans, aYTrans);
+    mDispatchToContentHitRegion.MoveBy(aXTrans, aYTrans);
+    mNoActionRegion.MoveBy(aXTrans, aYTrans);
+    mHorizontalPanRegion.MoveBy(aXTrans, aYTrans);
+    mVerticalPanRegion.MoveBy(aXTrans, aYTrans);
+  }
+
+  void Transform(const gfx::Matrix4x4& aTransform)
+  {
+    mHitRegion.Transform(aTransform);
+    mDispatchToContentHitRegion.Transform(aTransform);
+    mNoActionRegion.Transform(aTransform);
+    mHorizontalPanRegion.Transform(aTransform);
+    mVerticalPanRegion.Transform(aTransform);
+  }
+
+  bool IsEmpty() const
+  {
+    return mHitRegion.IsEmpty()
+        && mDispatchToContentHitRegion.IsEmpty()
+        && mNoActionRegion.IsEmpty()
+        && mHorizontalPanRegion.IsEmpty()
+        && mVerticalPanRegion.IsEmpty();
+  }
+
+  nsCString ToString() const
+  {
+    nsCString result = mHitRegion.ToString();
+    result.AppendLiteral(";dispatchToContent=");
+    result.Append(mDispatchToContentHitRegion.ToString());
+    return result;
+  }
+};
+
+// Bit flags that go on a ContainerLayer (or RefLayer) and override the
+// event regions in the entire subtree below. This is needed for propagating
+// various flags across processes since the child-process layout code doesn't
+// know about parent-process listeners or CSS rules.
+enum EventRegionsOverride {
+  // The default, no flags set
+  NoOverride             = 0,
+  // Treat all hit regions in the subtree as dispatch-to-content
+  ForceDispatchToContent = (1 << 0),
+  // Treat all hit regions in the subtree as empty
+  ForceEmptyHitRegion    = (1 << 1),
+  // OR union of all valid bit flags, for use in BitFlagsEnumSerializer
+  ALL_BITS               = (1 << 2) - 1
+};
+
+MOZ_ALWAYS_INLINE EventRegionsOverride
+operator|(EventRegionsOverride a, EventRegionsOverride b)
+{
+  return (EventRegionsOverride)((int)a | (int)b);
+}
+
+MOZ_ALWAYS_INLINE EventRegionsOverride&
+operator|=(EventRegionsOverride& a, EventRegionsOverride b)
+{
+  a = a | b;
+  return a;
+}
+
+// Flags used as an argument to functions that dump textures.
+enum TextureDumpMode {
+  Compress,      // dump texture with LZ4 compression
+  DoNotCompress  // dump texture uncompressed
+};
+
+// Some specialized typedefs of Matrix4x4Typed.
+typedef gfx::Matrix4x4Typed<LayerPixel, CSSTransformedLayerPixel> CSSTransformMatrix;
+// Several different async transforms can contribute to a layer's transform
+// (specifically, an async animation can contribute a transform, and each APZC
+// that scrolls a layer can contribute async scroll/zoom and overscroll
+// transforms).
+// To try to model this with typed units, we represent individual async
+// transforms as ParentLayer -> ParentLayer transforms (aliased as
+// AsyncTransformComponentMatrix), and we represent the product of all of them
+// as a CSSTransformLayer -> ParentLayer transform (aliased as
+// AsyncTransformMatrix). To create an AsyncTransformMatrix from component
+// matrices, a ViewAs operation is needed. A MultipleAsyncTransforms
+// PixelCastJustification is provided for this purpose.
+typedef gfx::Matrix4x4Typed<ParentLayerPixel, ParentLayerPixel> AsyncTransformComponentMatrix;
+typedef gfx::Matrix4x4Typed<CSSTransformedLayerPixel, ParentLayerPixel> AsyncTransformMatrix;
+
+} // namespace layers
+} // namespace mozilla
+
+#endif /* GFX_LAYERSTYPES_H */