Bug 952977: More gfx::Matrix cleanup in AsyncCompositionManager r=nical

gfx/2d/Matrix.h

@@ -556,6 +556,25 @@ public:
 
   bool Invert();
 
+  void ScalePost(Float aX, Float aY, Float aZ)
+  {
+    _11 *= aX;
+    _21 *= aX;
+    _31 *= aX;
+    _41 *= aX;
+
+    _12 *= aY;
+    _22 *= aY;
+    _32 *= aY;
+    _42 *= aY;
+
+    _13 *= aZ;
+    _23 *= aZ;
+    _33 *= aZ;
+    _43 *= aZ;
+  }
+
+
   // Set all the members of the matrix to NaN
   void SetNAN();
 };

gfx/layers/apz/src/APZCTreeManager.cpp

@@ -1199,7 +1199,7 @@ APZCTreeManager::GetAPZCAtPoint(AsyncPanZoomController* aApzc,
   //   and RC.Inverse() * QC.Inverse() * PC.Inverse() * PA.Inverse()                at P.
   gfx3DMatrix childUntransform = ancestorUntransform
                                * aApzc->GetCSSTransform().Inverse()
-                               * gfx3DMatrix(aApzc->GetCurrentAsyncTransform()).Inverse();
+                               * gfx::To3DMatrix(aApzc->GetCurrentAsyncTransform()).Inverse();
   gfxPointH3D hitTestPointForChildLayers = childUntransform.ProjectPoint(aHitTestPoint);
   APZCTM_LOG("Untransformed %f %f to layer coordinates %f %f for APZC %p\n",
            aHitTestPoint.x, aHitTestPoint.y,
@@ -1347,7 +1347,7 @@ APZCTreeManager::GetInputTransforms(AsyncPanZoomController *aApzc, gfx3DMatrix&
   // ancestorUntransform is OC.Inverse() * NC.Inverse() * MC.Inverse()
   gfx3DMatrix ancestorUntransform = aApzc->GetAncestorTransform().Inverse();
   // asyncUntransform is LA.Inverse()
-  gfx3DMatrix asyncUntransform = gfx3DMatrix(aApzc->GetCurrentAsyncTransform()).Inverse();
+  gfx3DMatrix asyncUntransform = gfx::To3DMatrix(aApzc->GetCurrentAsyncTransform()).Inverse();
   // nontransientAsyncTransform is LN
   gfx3DMatrix nontransientAsyncTransform = aApzc->GetNontransientAsyncTransform();
   // transientAsyncUntransform is LT.Inverse()
@@ -1362,7 +1362,7 @@ APZCTreeManager::GetInputTransforms(AsyncPanZoomController *aApzc, gfx3DMatrix&
     // ancestorUntransform is updated to RC.Inverse() * QC.Inverse() when parent == P
     ancestorUntransform = parent->GetAncestorTransform().Inverse();
     // asyncUntransform is updated to PA.Inverse() when parent == P
-    asyncUntransform = gfx3DMatrix(parent->GetCurrentAsyncTransform()).Inverse();
+    asyncUntransform = gfx::To3DMatrix(parent->GetCurrentAsyncTransform()).Inverse();
     // untransformSinceLastApzc is RC.Inverse() * QC.Inverse() * PC.Inverse() * PA.Inverse()
     gfx3DMatrix untransformSinceLastApzc = ancestorUntransform * parent->GetCSSTransform().Inverse() * asyncUntransform;
 

gfx/layers/client/TiledContentClient.cpp

@@ -1145,7 +1145,7 @@ GetCompositorSideCompositionBounds(ContainerLayer* aScrollAncestor,
 
   // Next, apply the APZ's async transform (this includes the nontransient component
   // as well).
-  transform = transform * gfx3DMatrix(aAPZTransform);
+  transform = transform * To3DMatrix(aAPZTransform);
 
   // Finally, put back the scroll ancestor's local transform.
   transform = transform * layerTransform;

gfx/layers/composite/AsyncCompositionManager.cpp

@@ -509,9 +509,9 @@ SampleAnimations(Layer* aLayer, TimeStamp aPoint)
 }
 
 Matrix4x4
-AdjustAndCombineWithCSSTransform(const gfx3DMatrix& asyncTransform, Layer* aLayer)
+AdjustAndCombineWithCSSTransform(const Matrix4x4& asyncTransform, Layer* aLayer)
 {
-  Matrix4x4 result = ToMatrix4x4(asyncTransform);
+  Matrix4x4 result = asyncTransform;
 
   // Container layers start at the origin, but they are clipped to where they
   // actually have content on the screen. The tree transform is meant to apply
@@ -675,7 +675,7 @@ ApplyAsyncTransformToScrollbarForContent(TimeStamp aCurrentFrame, ContainerLayer
     apzc->SampleContentTransformForFrame(aCurrentFrame, &asyncTransform, scrollOffset);
   }
 
-  gfx3DMatrix asyncTransform = gfx3DMatrix(apzc->GetCurrentAsyncTransform());
+  gfx3DMatrix asyncTransform = To3DMatrix(apzc->GetCurrentAsyncTransform());
   gfx3DMatrix nontransientTransform = apzc->GetNontransientAsyncTransform();
   gfx3DMatrix transientTransform = asyncTransform * nontransientTransform.Inverse();
 
@@ -780,11 +780,8 @@ AsyncCompositionManager::TransformScrollableLayer(Layer* aLayer)
   const FrameMetrics& metrics = container->GetFrameMetrics();
   // We must apply the resolution scale before a pan/zoom transform, so we call
   // GetTransform here.
-  gfx3DMatrix currentTransform = To3DMatrix(aLayer->GetTransform());
   Matrix4x4 oldTransform = aLayer->GetTransform();
 
-  gfx3DMatrix treeTransform;
-
   CSSToLayerScale geckoZoom = metrics.LayersPixelsPerCSSPixel();
 
   LayerIntPoint scrollOffsetLayerPixels = RoundedToInt(metrics.GetScrollOffset() * geckoZoom);
@@ -842,22 +839,22 @@ AsyncCompositionManager::TransformScrollableLayer(Layer* aLayer)
   }
 
   LayerPoint translation = (userScroll / zoomAdjust) - geckoScroll;
-  treeTransform = gfx3DMatrix(ViewTransform(-translation,
+  Matrix4x4 treeTransform = ViewTransform(-translation,
                                             userZoom
                                           / metrics.mDevPixelsPerCSSPixel
-                                          / metrics.GetParentResolution()));
+                                          / metrics.GetParentResolution());
 
   // The transform already takes the resolution scale into account.  Since we
   // will apply the resolution scale again when computing the effective
   // transform, we must apply the inverse resolution scale here.
-  gfx3DMatrix computedTransform = treeTransform * currentTransform;
+  Matrix4x4 computedTransform = treeTransform * oldTransform;
   computedTransform.Scale(1.0f/container->GetPreXScale(),
                           1.0f/container->GetPreYScale(),
                           1);
   computedTransform.ScalePost(1.0f/container->GetPostXScale(),
                               1.0f/container->GetPostYScale(),
                               1);
-  layerComposite->SetShadowTransform(ToMatrix4x4(computedTransform));
+  layerComposite->SetShadowTransform(computedTransform);
   NS_ASSERTION(!layerComposite->GetShadowTransformSetByAnimation(),
                "overwriting animated transform!");
 

gfx/layers/composite/AsyncCompositionManager.h

@@ -8,12 +8,12 @@
 
 #include "Units.h"                      // for LayerPoint, etc
 #include "mozilla/layers/LayerManagerComposite.h"  // for LayerManagerComposite
-#include "gfx3DMatrix.h"                // for gfx3DMatrix
 #include "mozilla/Attributes.h"         // for MOZ_DELETE, MOZ_FINAL, etc
 #include "mozilla/RefPtr.h"             // for RefCounted
 #include "mozilla/TimeStamp.h"          // for TimeStamp
 #include "mozilla/dom/ScreenOrientation.h"  // for ScreenOrientation
 #include "mozilla/gfx/BasePoint.h"      // for BasePoint
+#include "mozilla/gfx/Matrix.h"         // for Matrix4x4
 #include "mozilla/layers/LayersMessages.h"  // for TargetConfig
 #include "nsAutoPtr.h"                  // for nsRefPtr
 #include "nsISupportsImpl.h"            // for LayerManager::AddRef, etc
@@ -34,17 +34,17 @@ struct ViewTransform {
     , mScale(aScale)
   {}
 
-  operator gfx3DMatrix() const
+  operator gfx::Matrix4x4() const
   {
     return
-      gfx3DMatrix::Translation(mTranslation.x, mTranslation.y, 0) *
-      gfx3DMatrix::ScalingMatrix(mScale.scale, mScale.scale, 1);
+      gfx::Matrix4x4().Translate(mTranslation.x, mTranslation.y, 0) *
+      gfx::Matrix4x4().Scale(mScale.scale, mScale.scale, 1);
   }
 
   // For convenience, to avoid writing the cumbersome
-  // "gfx3dMatrix(a) * gfx3DMatrix(b)".
-  friend gfx3DMatrix operator*(const ViewTransform& a, const ViewTransform& b) {
-    return gfx3DMatrix(a) * gfx3DMatrix(b);
+  // "gfx::Matrix4x4(a) * gfx::Matrix4x4(b)".
+  friend gfx::Matrix4x4 operator*(const ViewTransform& a, const ViewTransform& b) {
+    return gfx::Matrix4x4(a) * gfx::Matrix4x4(b);
   }
 
   bool operator==(const ViewTransform& rhs) const {