1 files changed, 108 insertions, 0 deletions
diff --git a/gfx/layers/mlgpu/ImageLayerMLGPU.cpp b/gfx/layers/mlgpu/ImageLayerMLGPU.cpp
new file mode 100644
index 0000000000..9d236bf91f
--- /dev/null
+++ b/gfx/layers/mlgpu/ImageLayerMLGPU.cpp
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "ImageLayerMLGPU.h"
+#include "LayerManagerMLGPU.h"
+
+namespace mozilla {
+
+using namespace gfx;
+
+namespace layers {
+
+ImageLayerMLGPU::ImageLayerMLGPU(LayerManagerMLGPU* aManager)
+    : ImageLayer(aManager, static_cast<HostLayer*>(this)),
+      TexturedLayerMLGPU(aManager) {}
+
+ImageLayerMLGPU::~ImageLayerMLGPU() { CleanupResources(); }
+
+void ImageLayerMLGPU::ComputeEffectiveTransforms(
+    const gfx::Matrix4x4& aTransformToSurface) {
+  Matrix4x4 local = GetLocalTransform();
+
+  // Snap image edges to pixel boundaries.
+  gfxRect sourceRect(0, 0, 0, 0);
+  if (mHost && mHost->IsAttached()) {
+    IntSize size = mHost->GetImageSize();
+    sourceRect.SizeTo(size.width, size.height);
+  }
+
+  // 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);
+  mEffectiveTransformForBuffer = mEffectiveTransform;
+
+  if (mScaleMode == ScaleMode::STRETCH && mScaleToSize.width != 0.0 &&
+      mScaleToSize.height != 0.0) {
+    Size scale(sourceRect.Width() / mScaleToSize.width,
+               sourceRect.Height() / mScaleToSize.height);
+    mScale = Some(scale);
+  }
+
+  ComputeEffectiveTransformForMaskLayers(aTransformToSurface);
+}
+
+gfx::SamplingFilter ImageLayerMLGPU::GetSamplingFilter() {
+  return ImageLayer::GetSamplingFilter();
+}
+
+bool ImageLayerMLGPU::IsContentOpaque() {
+  if (mPictureRect.Width() == 0 || mPictureRect.Height() == 0) {
+    return false;
+  }
+  if (mScaleMode == ScaleMode::STRETCH) {
+    return gfx::IsOpaque(mHost->CurrentTextureHost()->GetFormat());
+  }
+  return false;
+}
+
+void ImageLayerMLGPU::SetRenderRegion(LayerIntRegion&& aRegion) {
+  switch (mScaleMode) {
+    case ScaleMode::STRETCH:
+      // See bug 1264142.
+      aRegion.AndWith(
+          LayerIntRect(0, 0, mScaleToSize.width, mScaleToSize.height));
+      break;
+    default:
+      // Clamp the visible region to the texture size. (see bug 1396507)
+      MOZ_ASSERT(mScaleMode == ScaleMode::SCALE_NONE);
+      aRegion.AndWith(
+          LayerIntRect(0, 0, mPictureRect.Width(), mPictureRect.Height()));
+      break;
+  }
+  LayerMLGPU::SetRenderRegion(std::move(aRegion));
+}
+
+void ImageLayerMLGPU::CleanupResources() {
+  if (mHost) {
+    mHost->CleanupResources();
+    mHost->Detach(this);
+  }
+  mTexture = nullptr;
+  mBigImageTexture = nullptr;
+  mHost = nullptr;
+}
+
+void ImageLayerMLGPU::PrintInfo(std::stringstream& aStream,
+                                const char* aPrefix) {
+  ImageLayer::PrintInfo(aStream, aPrefix);
+  if (mHost && mHost->IsAttached()) {
+    aStream << "\n";
+    nsAutoCString pfx(aPrefix);
+    pfx += "  ";
+    mHost->PrintInfo(aStream, pfx.get());
+  }
+}
+
+void ImageLayerMLGPU::Disconnect() { CleanupResources(); }
+
+void ImageLayerMLGPU::ClearCachedResources() { CleanupResources(); }
+
+}  // namespace layers
+}  // namespace mozilla