+
−/* -*- Mode: C++; tab-width: 20; 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/. */
+
−
+
−#include "ImageLayers.h"
+
−#include "ImageContainer.h"             // for ImageContainer
+
−#include "gfxRect.h"                    // for gfxRect
+
−#include "nsDebug.h"                    // for NS_ASSERTION
+
−#include "nsISupportsImpl.h"            // for ImageContainer::Release, etc
+
−#include "gfx2DGlue.h"
+
−
+
−namespace mozilla {
+
−namespace layers {
+
−
+
−ImageLayer::ImageLayer(LayerManager* aManager, void* aImplData)
+
−: Layer(aManager, aImplData), mSamplingFilter(gfx::SamplingFilter::GOOD)
+
−, mScaleMode(ScaleMode::SCALE_NONE)
+
−{}
+
−
+
−ImageLayer::~ImageLayer()
+
−{}
+
−
+
−void ImageLayer::SetContainer(ImageContainer* aContainer) 
+
−{
+
−  mContainer = aContainer;
+
−}
+
−
+
−void ImageLayer::ComputeEffectiveTransforms(const gfx::Matrix4x4& aTransformToSurface)
+
−{
+
−  gfx::Matrix4x4 local = GetLocalTransform();
+
−
+
−  // Snap image edges to pixel boundaries
+
−  gfxRect sourceRect(0, 0, 0, 0);
+
−  if (mContainer) {
+
−    sourceRect.SizeTo(SizeDouble(mContainer->GetCurrentSize()));
+
−  }
+
−  // Snap our local transform first, and snap the inherited transform as well.
+
−  // This makes our snapping equivalent to what would happen if our content
+
−  // was drawn into a PaintedLayer (gfxContext would snap using the local
+
−  // transform, then we'd snap again when compositing the PaintedLayer).
+
−  mEffectiveTransform =
+
−      SnapTransform(local, sourceRect, nullptr) *
+
−      SnapTransformTranslation(aTransformToSurface, nullptr);
+
−
+
−  if (mScaleMode != ScaleMode::SCALE_NONE &&
+
−      sourceRect.width != 0.0 && sourceRect.height != 0.0) {
+
−    NS_ASSERTION(mScaleMode == ScaleMode::STRETCH,
+
−                 "No other scalemodes than stretch and none supported yet.");
+
−    local.PreScale(mScaleToSize.width / sourceRect.width,
+
−                   mScaleToSize.height / sourceRect.height, 1.0);
+
−
+
−    mEffectiveTransformForBuffer =
+
−        SnapTransform(local, sourceRect, nullptr) *
+
−        SnapTransformTranslation(aTransformToSurface, nullptr);
+
−  } else {
+
−    mEffectiveTransformForBuffer = mEffectiveTransform;
+
−  }
+
−
+
−  ComputeEffectiveTransformForMaskLayers(aTransformToSurface);
+
−}
+
−
+
−} // namespace layers
+
−} // namespace mozilla