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** Copyright (C) 2017 The Qt Company Ltd.
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#include "Qt3DSRenderSubpresentation.h"
#include "Qt3DSRenderRenderList.h"
#ifdef _WIN32
#pragma warning(disable : 4355) // this used in initializer list.  I have never seen this result in
                                // a physical error
#endif
namespace qt3ds {
namespace render {

    Qt3DSRenderPickResult CSubPresentationPickQuery::Pick(const QT3DSVec2 &inMouseCoords,
                                                         const QT3DSVec2 &inViewportDimensions,
                                                         bool inPickEverything)
    {
        return m_Renderer.DoGraphQueryPick(inMouseCoords, inViewportDimensions, inPickEverything);
    }

    CSubPresentationRenderer::CSubPresentationRenderer(IQt3DSRenderContext &inRenderContext,
                                                       SPresentation &inPresentation)
        : m_RenderContext(inRenderContext)
        , m_Presentation(inPresentation)
        , mRefCount(0)
        , m_PickQuery(*this)
        , m_OffscreenRendererType(inRenderContext.GetStringTable().RegisterStr(GetRendererName()))
    {
    }

    SOffscreenRendererEnvironment
        CSubPresentationRenderer::GetDesiredEnvironment(QT3DSVec2 /*inPresScale*/)
    {
        // If we aren't using a clear color, then we are expected to blend with the background
        bool hasTransparency = m_Presentation.m_Scene->m_UseClearColor ? false : true;
        NVRenderTextureFormats::Enum format =
            hasTransparency ? NVRenderTextureFormats::RGBA8 : NVRenderTextureFormats::RGB8;
        return SOffscreenRendererEnvironment((QT3DSU32)(m_Presentation.m_PresentationDimensions.x),
                                             (QT3DSU32)(m_Presentation.m_PresentationDimensions.y),
                                             format, OffscreenRendererDepthValues::Depth16, false,
                                             AAModeValues::NoAA);
    }

    SOffscreenRenderFlags
    CSubPresentationRenderer::NeedsRender(const SOffscreenRendererEnvironment & /*inEnvironment*/,
                                          QT3DSVec2 /*inPresScale*/,
                                          const SRenderInstanceId instanceId)
    {
        bool hasTransparency = m_Presentation.m_Scene->m_UseClearColor ? false : true;
        NVRenderRect theViewportSize(m_RenderContext.GetRenderList().GetViewport());
        bool wasDirty = m_Presentation.m_Scene->PrepareForRender(
            QT3DSVec2((QT3DSF32)theViewportSize.m_Width, (QT3DSF32)theViewportSize.m_Height),
            m_RenderContext, instanceId);
        return SOffscreenRenderFlags(hasTransparency, wasDirty);
    }

    // Returns true if the rendered result image has transparency, or false
    // if it should be treated as a completely opaque image.
    void CSubPresentationRenderer::Render(const SOffscreenRendererEnvironment &inEnvironment,
                                          NVRenderContext &inRenderContext, QT3DSVec2,
                                          SScene::RenderClearCommand inClearColorBuffer,
                                          const SRenderInstanceId instanceId)
    {
        SSubPresentationHelper theHelper(
            m_RenderContext,
            QSize((QT3DSU32)inEnvironment.m_Width, (QT3DSU32)inEnvironment.m_Height));
        NVRenderRect theViewportSize(inRenderContext.GetViewport());
        m_Presentation.m_Scene->Render(
            QT3DSVec2((QT3DSF32)theViewportSize.m_Width, (QT3DSF32)theViewportSize.m_Height),
            m_RenderContext, inClearColorBuffer, instanceId);
        m_LastRenderedEnvironment = inEnvironment;
    }

    void CSubPresentationRenderer::RenderWithClear(
        const SOffscreenRendererEnvironment &inEnvironment,
        NVRenderContext &inRenderContext, QT3DSVec2 inPresScale,
        SScene::RenderClearCommand inClearBuffer, QT3DSVec4 inClearColor,
        const SRenderInstanceId id)
    {
        Q_UNUSED(inEnvironment);
        Q_UNUSED(inPresScale);
        NVRenderRect theViewportSize(inRenderContext.GetViewport());
        m_Presentation.m_Scene->RenderWithClear(
            QT3DSVec2((QT3DSF32)theViewportSize.m_Width, (QT3DSF32)theViewportSize.m_Height),
            m_RenderContext, inClearBuffer, inClearColor, id);
    }

    // You know the viewport dimensions because
    Qt3DSRenderPickResult CSubPresentationRenderer::DoGraphQueryPick(
        const QT3DSVec2 &inMouseCoords, const QT3DSVec2 &inViewportDimensions, bool inPickEverything)
    {
        Qt3DSRenderPickResult thePickResult;

        if (m_Presentation.m_Scene && m_Presentation.m_Scene->m_FirstChild) {
            thePickResult = m_RenderContext.GetRenderer().Pick(
                *m_Presentation.m_Scene->m_FirstChild, inViewportDimensions,
                QT3DSVec2(inMouseCoords.x, inMouseCoords.y), true, inPickEverything);
        }
        return thePickResult;
    }
}
}