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 /* -*- 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 "ContainerLayerD3D10.h"

 #include "ThebesLayerD3D10.h"

 #include "ReadbackProcessor.h"

 using namespace mozilla::gfx;

 namespace mozilla {

 namespace layers {

 ContainerLayerD3D10::ContainerLayerD3D10(LayerManagerD3D10 *aManager)

   : ContainerLayer(aManager, nullptr)

   , LayerD3D10(aManager)

 {

   mImplData = static_cast<LayerD3D10*>(this);

 }

 ContainerLayerD3D10::~ContainerLayerD3D10()

 {

   while (mFirstChild) {

     RemoveChild(mFirstChild);

   }

 }

 Layer*

 ContainerLayerD3D10::GetLayer()

 {

   return this;

 }

 LayerD3D10*

 ContainerLayerD3D10::GetFirstChildD3D10()

 {

   if (!mFirstChild) {

     return nullptr;

   }

   return static_cast<LayerD3D10*>(mFirstChild->ImplData());

 }

 static inline LayerD3D10*

 GetNextSiblingD3D10(LayerD3D10* aLayer)

 {

    Layer* layer = aLayer->GetLayer()->GetNextSibling();

    return layer ? static_cast<LayerD3D10*>(layer->

                                            ImplData())

                 : nullptr;

 }

 void

 ContainerLayerD3D10::RenderLayer()

 {

   float renderTargetOffset[] = { 0, 0 };

   nsIntRect visibleRect = mVisibleRegion.GetBounds();

   float opacity = GetEffectiveOpacity();

   bool useIntermediate = UseIntermediateSurface();

   nsRefPtr<ID3D10RenderTargetView> previousRTView;

   nsRefPtr<ID3D10Texture2D> renderTexture;

   nsRefPtr<ID3D10RenderTargetView> rtView;

   float previousRenderTargetOffset[2];

   nsIntSize previousViewportSize;

   gfx3DMatrix oldViewMatrix;

   if (useIntermediate) {

     device()->OMGetRenderTargets(1, getter_AddRefs(previousRTView), nullptr);

     D3D10_TEXTURE2D_DESC desc;

     memset(&desc, 0, sizeof(D3D10_TEXTURE2D_DESC));

     desc.ArraySize = 1;

     desc.MipLevels = 1;

     desc.Width = visibleRect.width;

     desc.Height = visibleRect.height;

     desc.BindFlags = D3D10_BIND_RENDER_TARGET | D3D10_BIND_SHADER_RESOURCE;

     desc.SampleDesc.Count = 1;

     desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;

     HRESULT hr;

     hr = device()->CreateTexture2D(&desc, nullptr, getter_AddRefs(renderTexture));

     if (FAILED(hr)) {

       LayerManagerD3D10::ReportFailure(NS_LITERAL_CSTRING("Failed to create new texture for ContainerLayerD3D10!"), 

                                        hr);

       return;

     }

     hr = device()->CreateRenderTargetView(renderTexture, nullptr, getter_AddRefs(rtView));

     NS_ASSERTION(SUCCEEDED(hr), "Failed to create render target view for ContainerLayerD3D10!");

     effect()->GetVariableByName("vRenderTargetOffset")->

       GetRawValue(previousRenderTargetOffset, 0, 8);

     previousViewportSize = mD3DManager->GetViewport();

     if (mVisibleRegion.GetNumRects() != 1 || !(GetContentFlags() & CONTENT_OPAQUE)) {

       Matrix4x4 transform3D = GetEffectiveTransform();

       Matrix transform;

       // If we have an opaque ancestor layer, then we can be sure that

       // all the pixels we draw into are either opaque already or will be

       // covered by something opaque. Otherwise copying up the background is

       // not safe.

       if (mSupportsComponentAlphaChildren) {

         bool is2d = transform3D.Is2D(&transform);

         NS_ASSERTION(is2d, "Transform should be 2d when mSupportsComponentAlphaChildren.");

         // Copy background up from below. This applies any 2D transform that is

         // applied to use relative to our parent, and compensates for the offset

         // that was applied on our parent's rendering.

         D3D10_BOX srcBox;

         srcBox.left = std::max<int32_t>(visibleRect.x + int32_t(transform._31) - int32_t(previousRenderTargetOffset[0]), 0);

         srcBox.top = std::max<int32_t>(visibleRect.y + int32_t(transform._32) - int32_t(previousRenderTargetOffset[1]), 0);

         srcBox.right = std::min<int32_t>(srcBox.left + visibleRect.width, previousViewportSize.width);

         srcBox.bottom = std::min<int32_t>(srcBox.top + visibleRect.height, previousViewportSize.height);

         srcBox.back = 1;

         srcBox.front = 0;

         nsRefPtr<ID3D10Resource> srcResource;

         previousRTView->GetResource(getter_AddRefs(srcResource));

         device()->CopySubresourceRegion(renderTexture, 0,

                                         0, 0, 0,

                                         srcResource, 0,

                                         &srcBox);

       } else {

         float black[] = { 0, 0, 0, 0};

         device()->ClearRenderTargetView(rtView, black);

       }

     }

     ID3D10RenderTargetView *rtViewPtr = rtView;

     device()->OMSetRenderTargets(1, &rtViewPtr, nullptr);

     renderTargetOffset[0] = (float)visibleRect.x;

     renderTargetOffset[1] = (float)visibleRect.y;

     effect()->GetVariableByName("vRenderTargetOffset")->

       SetRawValue(renderTargetOffset, 0, 8);

     mD3DManager->SetViewport(nsIntSize(visibleRect.Size()));

   }

   D3D10_RECT oldD3D10Scissor;

   UINT numRects = 1;

   device()->RSGetScissorRects(&numRects, &oldD3D10Scissor);

   // Convert scissor to an nsIntRect. D3D10_RECT's are exclusive

   // on the bottom and right values.

   nsIntRect oldScissor(oldD3D10Scissor.left,

                        oldD3D10Scissor.top,

                        oldD3D10Scissor.right - oldD3D10Scissor.left,

                        oldD3D10Scissor.bottom - oldD3D10Scissor.top);

   nsAutoTArray<Layer*, 12> children;

   SortChildrenBy3DZOrder(children);

   /*

    * Render this container's contents.

    */

   for (uint32_t i = 0; i < children.Length(); i++) {

     LayerD3D10* layerToRender = static_cast<LayerD3D10*>(children.ElementAt(i)->ImplData());

     if (layerToRender->GetLayer()->GetEffectiveVisibleRegion().IsEmpty()) {

       continue;

     }

     nsIntRect scissorRect =

         layerToRender->GetLayer()->CalculateScissorRect(oldScissor, nullptr);

     if (scissorRect.IsEmpty()) {

       continue;

     }

     D3D10_RECT d3drect;

     d3drect.left = scissorRect.x;

     d3drect.top = scissorRect.y;

     d3drect.right = scissorRect.x + scissorRect.width;

     d3drect.bottom = scissorRect.y + scissorRect.height;

     device()->RSSetScissorRects(1, &d3drect);

     layerToRender->RenderLayer();

   }

   device()->RSSetScissorRects(1, &oldD3D10Scissor);

   if (useIntermediate) {

     mD3DManager->SetViewport(previousViewportSize);

     ID3D10RenderTargetView *rtView = previousRTView;

     device()->OMSetRenderTargets(1, &rtView, nullptr);

     effect()->GetVariableByName("vRenderTargetOffset")->

       SetRawValue(previousRenderTargetOffset, 0, 8);

     SetEffectTransformAndOpacity();

     ID3D10EffectTechnique *technique;

     if (LoadMaskTexture()) {

       if (GetTransform().CanDraw2D()) {

         technique = SelectShader(SHADER_RGBA | SHADER_PREMUL | SHADER_MASK);

       } else {

         technique = SelectShader(SHADER_RGBA | SHADER_PREMUL | SHADER_MASK_3D);

       }

     } else {

         technique = SelectShader(SHADER_RGBA | SHADER_PREMUL | SHADER_NO_MASK);

     }

     effect()->GetVariableByName("vLayerQuad")->AsVector()->SetFloatVector(

       ShaderConstantRectD3D10(

         (float)visibleRect.x,

         (float)visibleRect.y,

         (float)visibleRect.width,

         (float)visibleRect.height)

       );

     technique->GetPassByIndex(0)->Apply(0);

     ID3D10ShaderResourceView *view;

     device()->CreateShaderResourceView(renderTexture, nullptr, &view);

     device()->PSSetShaderResources(0, 1, &view);    

     device()->Draw(4, 0);

     view->Release();

   }

 }

 void

 ContainerLayerD3D10::LayerManagerDestroyed()

 {

   while (mFirstChild) {

     GetFirstChildD3D10()->LayerManagerDestroyed();

     RemoveChild(mFirstChild);

   }

 }

 void

 ContainerLayerD3D10::Validate()

 {

   nsIntRect visibleRect = mVisibleRegion.GetBounds();

   mSupportsComponentAlphaChildren = false;

   if (UseIntermediateSurface()) {

     Matrix4x4 transform3D = GetEffectiveTransform();

     Matrix transform;

     if (mVisibleRegion.GetNumRects() == 1 && (GetContentFlags() & CONTENT_OPAQUE)) {

       // don't need a background, we're going to paint all opaque stuff

       mSupportsComponentAlphaChildren = true;

     } else {

       if (HasOpaqueAncestorLayer(this) &&

           transform3D.Is2D(&transform) && !ThebesMatrix(transform).HasNonIntegerTranslation() &&

           GetParent()->GetEffectiveVisibleRegion().GetBounds().Contains(visibleRect))

       {

         // In this case we can copy up the background. See RenderLayer.

         mSupportsComponentAlphaChildren = true;

       }

     }

   } else {

     mSupportsComponentAlphaChildren = (GetContentFlags() & CONTENT_OPAQUE) ||

         (mParent && mParent->SupportsComponentAlphaChildren());

   }

   ReadbackProcessor readback;

   readback.BuildUpdates(this);

   Layer *layer = GetFirstChild();

   while (layer) {

     if (layer->GetType() == TYPE_THEBES) {

       static_cast<ThebesLayerD3D10*>(layer)->Validate(&readback);

     } else {

       static_cast<LayerD3D10*>(layer->ImplData())->Validate();

     }

     layer = layer->GetNextSibling();

   }

 }

 } /* layers */

 } /* mozilla */