/*
 * IWineD3DQuery implementation
 *
 * Copyright 2005 Oliver Stieber
 * Copyright 2007-2008 Stefan Dösinger for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */


#include "config.h"
#include "wined3d_private.h"

/*
 * Occlusion Queries:
 * http://www.gris.uni-tuebingen.de/~bartz/Publications/paper/hww98.pdf
 * http://oss.sgi.com/projects/ogl-sample/registry/ARB/occlusion_query.txt
 */

WINE_DEFAULT_DEBUG_CHANNEL(d3d);
#define GLINFO_LOCATION This->wineD3DDevice->adapter->gl_info

/* *******************************************
   IWineD3DQuery IUnknown parts follow
   ******************************************* */
static HRESULT  WINAPI IWineD3DQueryImpl_QueryInterface(IWineD3DQuery *iface, REFIID riid, LPVOID *ppobj)
{
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;
    TRACE("(%p)->(%s,%p)\n",This,debugstr_guid(riid),ppobj);
    if (IsEqualGUID(riid, &IID_IUnknown)
        || IsEqualGUID(riid, &IID_IWineD3DBase)
        || IsEqualGUID(riid, &IID_IWineD3DQuery)) {
        IUnknown_AddRef(iface);
        *ppobj = This;
        return S_OK;
    }
    *ppobj = NULL;
    return E_NOINTERFACE;
}

static ULONG  WINAPI IWineD3DQueryImpl_AddRef(IWineD3DQuery *iface) {
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;
    TRACE("(%p) : AddRef increasing from %d\n", This, This->ref);
    return InterlockedIncrement(&This->ref);
}

static ULONG  WINAPI IWineD3DQueryImpl_Release(IWineD3DQuery *iface) {
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;
    ULONG ref;
    TRACE("(%p) : Releasing from %d\n", This, This->ref);
    ref = InterlockedDecrement(&This->ref);
    if (ref == 0) {
        /* Queries are specific to the GL context that created them. Not
         * deleting the query will obviously leak it, but that's still better
         * than potentially deleting a different query with the same id in this
         * context, and (still) leaking the actual query. */
        if (This->type == WINED3DQUERYTYPE_EVENT)
        {
            WineQueryEventData *query_data = (WineQueryEventData *)This->extendedData;

            if (query_data->ctx->tid != GetCurrentThreadId())
            {
                FIXME("Query was created in a different thread, skipping deletion.\n");
            }
            else
            {
                ActivateContext(This->wineD3DDevice, query_data->ctx->surface, CTXUSAGE_RESOURCELOAD);

                ENTER_GL();

                if (GL_SUPPORT(APPLE_FENCE))
                {
                    GL_EXTCALL(glDeleteFencesAPPLE(1, &query_data->fenceId));
                    checkGLcall("glDeleteFencesAPPLE");
                }
                else if (GL_SUPPORT(NV_FENCE))
                {
                    GL_EXTCALL(glDeleteFencesNV(1, &query_data->fenceId));
                    checkGLcall("glDeleteFencesNV");
                }

                LEAVE_GL();
            }
        }
        else if (This->type == WINED3DQUERYTYPE_OCCLUSION && GL_SUPPORT(ARB_OCCLUSION_QUERY))
        {
            WineQueryOcclusionData *query_data = (WineQueryOcclusionData *)This->extendedData;

            if (query_data->ctx->tid != GetCurrentThreadId())
            {
                FIXME("Query was created in a different thread, skipping deletion.\n");
            }
            else
            {
                ActivateContext(This->wineD3DDevice, query_data->ctx->surface, CTXUSAGE_RESOURCELOAD);

                ENTER_GL();

                GL_EXTCALL(glDeleteQueriesARB(1, &query_data->queryId));
                checkGLcall("glDeleteQueriesARB");

                LEAVE_GL();
            }
        }

        HeapFree(GetProcessHeap(), 0, This->extendedData);
        HeapFree(GetProcessHeap(), 0, This);
    }
    return ref;
}

/* *******************************************
   IWineD3DQuery IWineD3DQuery parts follow
   ******************************************* */
static HRESULT  WINAPI IWineD3DQueryImpl_GetParent(IWineD3DQuery *iface, IUnknown** parent){
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;

    *parent= (IUnknown*) parent;
    IUnknown_AddRef(*parent);
    TRACE("(%p) : returning %p\n", This, *parent);
    return WINED3D_OK;
}

static HRESULT  WINAPI IWineD3DQueryImpl_GetDevice(IWineD3DQuery* iface, IWineD3DDevice **pDevice){
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;
    IWineD3DDevice_AddRef((IWineD3DDevice *)This->wineD3DDevice);
    *pDevice = (IWineD3DDevice *)This->wineD3DDevice;
    TRACE("(%p) returning %p\n", This, *pDevice);
    return WINED3D_OK;
}


static HRESULT  WINAPI IWineD3DQueryImpl_GetData(IWineD3DQuery* iface, void* pData, DWORD dwSize, DWORD dwGetDataFlags){
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;
    HRESULT res = S_OK;

    TRACE("(%p) : type %#x, pData %p, dwSize %#x, dwGetDataFlags %#x\n", This, This->type, pData, dwSize, dwGetDataFlags);

    switch (This->type){

    case WINED3DQUERYTYPE_VCACHE:
    {

        WINED3DDEVINFO_VCACHE *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_VCACHE\n", This);
        if(pData == NULL || dwSize == 0) break;
        data->Pattern     = WINEMAKEFOURCC('C','A','C','H');
        data->OptMethod   = 0; /*0 get longest strips, 1 optimize vertex cache*/
        data->CacheSize   = 0; /*cache size, only required if OptMethod == 1*/
        data->MagicNumber = 0; /*only required if OptMethod == 1 (used internally)*/

    }
    break;
    case WINED3DQUERYTYPE_RESOURCEMANAGER:
    {
        WINED3DDEVINFO_RESOURCEMANAGER *data = pData;
        int i;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_RESOURCEMANAGER\n", This);
        if(pData == NULL || dwSize == 0) break;
        for(i = 0; i < WINED3DRTYPECOUNT; i++){
            /*I'm setting the default values to 1 so as to reduce the risk of a div/0 in the caller*/
            /*  isTextureResident could be used to get some of this information  */
            data->stats[i].bThrashing            = FALSE;
            data->stats[i].ApproxBytesDownloaded = 1;
            data->stats[i].NumEvicts             = 1;
            data->stats[i].NumVidCreates         = 1;
            data->stats[i].LastPri               = 1;
            data->stats[i].NumUsed               = 1;
            data->stats[i].NumUsedInVidMem       = 1;
            data->stats[i].WorkingSet            = 1;
            data->stats[i].WorkingSetBytes       = 1;
            data->stats[i].TotalManaged          = 1;
            data->stats[i].TotalBytes            = 1;
        }

    }
    break;
    case WINED3DQUERYTYPE_VERTEXSTATS:
    {
        WINED3DDEVINFO_VERTEXSTATS *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_VERTEXSTATS\n", This);
        if(pData == NULL || dwSize == 0) break;
        data->NumRenderedTriangles      = 1;
        data->NumExtraClippingTriangles = 1;

    }
    break;
    case WINED3DQUERYTYPE_TIMESTAMP:
    {
        UINT64* data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_TIMESTAMP\n", This);
        if(pData == NULL || dwSize == 0) break;
        *data = 1; /*Don't know what this is supposed to be*/
    }
    break;
    case WINED3DQUERYTYPE_TIMESTAMPDISJOINT:
    {
        BOOL* data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_TIMESTAMPDISJOINT\n", This);
        if(pData == NULL || dwSize == 0) break;
        *data = FALSE; /*Don't know what this is supposed to be*/
    }
    break;
    case WINED3DQUERYTYPE_TIMESTAMPFREQ:
    {
        UINT64* data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_TIMESTAMPFREQ\n", This);
        if(pData == NULL || dwSize == 0) break;
        *data = 1; /*Don't know what this is supposed to be*/
    }
    break;
    case WINED3DQUERYTYPE_PIPELINETIMINGS:
    {
        WINED3DDEVINFO_PIPELINETIMINGS *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_PIPELINETIMINGS\n", This);
        if(pData == NULL || dwSize == 0) break;

        data->VertexProcessingTimePercent    =   1.0f;
        data->PixelProcessingTimePercent     =   1.0f;
        data->OtherGPUProcessingTimePercent  =  97.0f;
        data->GPUIdleTimePercent             =   1.0f;
    }
    break;
    case WINED3DQUERYTYPE_INTERFACETIMINGS:
    {
        WINED3DDEVINFO_INTERFACETIMINGS *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_INTERFACETIMINGS\n", This);

        if(pData == NULL || dwSize == 0) break;
        data->WaitingForGPUToUseApplicationResourceTimePercent =   1.0f;
        data->WaitingForGPUToAcceptMoreCommandsTimePercent     =   1.0f;
        data->WaitingForGPUToStayWithinLatencyTimePercent      =   1.0f;
        data->WaitingForGPUExclusiveResourceTimePercent        =   1.0f;
        data->WaitingForGPUOtherTimePercent                    =  96.0f;
    }

    break;
    case WINED3DQUERYTYPE_VERTEXTIMINGS:
    {
        WINED3DDEVINFO_STAGETIMINGS *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_VERTEXTIMINGS\n", This);

        if(pData == NULL || dwSize == 0) break;
        data->MemoryProcessingPercent      = 50.0f;
        data->ComputationProcessingPercent = 50.0f;

    }
    break;
    case WINED3DQUERYTYPE_PIXELTIMINGS:
    {
        WINED3DDEVINFO_STAGETIMINGS *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_PIXELTIMINGS\n", This);

        if(pData == NULL || dwSize == 0) break;
        data->MemoryProcessingPercent      = 50.0f;
        data->ComputationProcessingPercent = 50.0f;
    }
    break;
    case WINED3DQUERYTYPE_BANDWIDTHTIMINGS:
    {
        WINED3DDEVINFO_BANDWIDTHTIMINGS *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_BANDWIDTHTIMINGS\n", This);

        if(pData == NULL || dwSize == 0) break;
        data->MaxBandwidthUtilized                =  1.0f;
        data->FrontEndUploadMemoryUtilizedPercent =  1.0f;
        data->VertexRateUtilizedPercent           =  1.0f;
        data->TriangleSetupRateUtilizedPercent    =  1.0f;
        data->FillRateUtilizedPercent             = 97.0f;
    }
    break;
    case WINED3DQUERYTYPE_CACHEUTILIZATION:
    {
        WINED3DDEVINFO_CACHEUTILIZATION *data = pData;
        FIXME("(%p): Unimplemented query WINED3DQUERYTYPE_CACHEUTILIZATION\n", This);

        if(pData == NULL || dwSize == 0) break;
        data->TextureCacheHitRate             = 1.0f;
        data->PostTransformVertexCacheHitRate = 1.0f;
    }


    break;
    default:
        FIXME("(%p) Unhandled query type %d\n",This , This->type);

    };

    /*dwGetDataFlags = 0 || D3DGETDATA_FLUSH
    D3DGETDATA_FLUSH may return WINED3DERR_DEVICELOST if the device is lost
    */
    return res; /* S_OK if the query data is available*/
}

static HRESULT  WINAPI IWineD3DOcclusionQueryImpl_GetData(IWineD3DQuery* iface, void* pData, DWORD dwSize, DWORD dwGetDataFlags) {
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *) iface;
    WineQueryOcclusionData *query_data = (WineQueryOcclusionData *)This->extendedData;
    DWORD* data = pData;
    GLuint available;
    GLuint samples;
    HRESULT res;

    TRACE("(%p) : type D3DQUERY_OCCLUSION, pData %p, dwSize %#x, dwGetDataFlags %#x\n", This, pData, dwSize, dwGetDataFlags);

    if (This->state == QUERY_CREATED)
    {
        /* D3D allows GetData on a new query, OpenGL doesn't. So just invent the data ourselves */
        TRACE("Query wasn't yet started, returning S_OK\n");
        if(data) *data = 0;
        return S_OK;
    }

    if (This->state == QUERY_BUILDING)
    {
        /* Msdn says this returns an error, but our tests show that S_FALSE is returned */
        TRACE("Query is building, returning S_FALSE\n");
        return S_FALSE;
    }

    if (!GL_SUPPORT(ARB_OCCLUSION_QUERY))
    {
        WARN("(%p) : Occlusion queries not supported. Returning 1.\n", This);
        *data = 1;
        return S_OK;
    }

    if (query_data->ctx->tid != GetCurrentThreadId())
    {
        FIXME("%p Wrong thread, returning 1.\n", This);
        *data = 1;
        return S_OK;
    }

    ActivateContext(This->wineD3DDevice, query_data->ctx->surface, CTXUSAGE_RESOURCELOAD);

    ENTER_GL();

    GL_EXTCALL(glGetQueryObjectuivARB(query_data->queryId, GL_QUERY_RESULT_AVAILABLE_ARB, &available));
    checkGLcall("glGetQueryObjectuivARB(GL_QUERY_RESULT_AVAILABLE)\n");
    TRACE("(%p) : available %d.\n", This, available);

    if (available)
    {
        if (data)
        {
            GL_EXTCALL(glGetQueryObjectuivARB(query_data->queryId, GL_QUERY_RESULT_ARB, &samples));
            checkGLcall("glGetQueryObjectuivARB(GL_QUERY_RESULT)\n");
            TRACE("(%p) : Returning %d samples.\n", This, samples);
            *data = samples;
        }
        res = S_OK;
    }
    else
    {
        res = S_FALSE;
    }

    LEAVE_GL();

    return res;
}

static HRESULT  WINAPI IWineD3DEventQueryImpl_GetData(IWineD3DQuery* iface, void* pData, DWORD dwSize, DWORD dwGetDataFlags) {
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *) iface;
    BOOL* data = pData;
    WineQueryEventData *query_data = (WineQueryEventData *)This->extendedData;

    TRACE("(%p) : type D3DQUERY_EVENT, pData %p, dwSize %#x, dwGetDataFlags %#x\n", This, pData, dwSize, dwGetDataFlags);

    if (!pData || !dwSize) return S_OK;

    if (query_data->ctx->tid != GetCurrentThreadId())
    {
        /* See comment in IWineD3DQuery::Issue, event query codeblock */
        FIXME("Wrong thread, reporting GPU idle.\n");
        *data = TRUE;

        return S_OK;
    }

    ActivateContext(This->wineD3DDevice, query_data->ctx->surface, CTXUSAGE_RESOURCELOAD);

    ENTER_GL();

    if (GL_SUPPORT(APPLE_FENCE))
    {
        *data = GL_EXTCALL(glTestFenceAPPLE(query_data->fenceId));
        checkGLcall("glTestFenceAPPLE");
    }
    else if (GL_SUPPORT(NV_FENCE))
    {
        *data = GL_EXTCALL(glTestFenceNV(query_data->fenceId));
        checkGLcall("glTestFenceNV");
    }
    else
    {
        WARN("(%p): reporting GPU idle\n", This);
        *data = TRUE;
    }

    LEAVE_GL();

    return S_OK;
}

static DWORD  WINAPI IWineD3DQueryImpl_GetDataSize(IWineD3DQuery* iface){
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;
    int dataSize = 0;
    TRACE("(%p) : type %#x\n", This, This->type);
    switch(This->type){
    case WINED3DQUERYTYPE_VCACHE:
        dataSize = sizeof(WINED3DDEVINFO_VCACHE);
        break;
    case WINED3DQUERYTYPE_RESOURCEMANAGER:
        dataSize = sizeof(WINED3DDEVINFO_RESOURCEMANAGER);
        break;
    case WINED3DQUERYTYPE_VERTEXSTATS:
        dataSize = sizeof(WINED3DDEVINFO_VERTEXSTATS);
        break;
    case WINED3DQUERYTYPE_EVENT:
        dataSize = sizeof(BOOL);
        break;
    case WINED3DQUERYTYPE_TIMESTAMP:
        dataSize = sizeof(UINT64);
        break;
    case WINED3DQUERYTYPE_TIMESTAMPDISJOINT:
        dataSize = sizeof(BOOL);
        break;
    case WINED3DQUERYTYPE_TIMESTAMPFREQ:
        dataSize = sizeof(UINT64);
        break;
    case WINED3DQUERYTYPE_PIPELINETIMINGS:
        dataSize = sizeof(WINED3DDEVINFO_PIPELINETIMINGS);
        break;
    case WINED3DQUERYTYPE_INTERFACETIMINGS:
        dataSize = sizeof(WINED3DDEVINFO_INTERFACETIMINGS);
        break;
    case WINED3DQUERYTYPE_VERTEXTIMINGS:
        dataSize = sizeof(WINED3DDEVINFO_STAGETIMINGS);
        break;
    case WINED3DQUERYTYPE_PIXELTIMINGS:
        dataSize = sizeof(WINED3DDEVINFO_STAGETIMINGS);
        break;
    case WINED3DQUERYTYPE_BANDWIDTHTIMINGS:
        dataSize = sizeof(WINED3DQUERYTYPE_BANDWIDTHTIMINGS);
        break;
    case WINED3DQUERYTYPE_CACHEUTILIZATION:
        dataSize = sizeof(WINED3DDEVINFO_CACHEUTILIZATION);
        break;
    default:
       FIXME("(%p) Unhandled query type %d\n",This , This->type);
       dataSize = 0;
    }
    return dataSize;
}

static DWORD  WINAPI IWineD3DEventQueryImpl_GetDataSize(IWineD3DQuery* iface){
    TRACE("(%p) : type D3DQUERY_EVENT\n", iface);

    return sizeof(BOOL);
}

static DWORD  WINAPI IWineD3DOcclusionQueryImpl_GetDataSize(IWineD3DQuery* iface){
    TRACE("(%p) : type D3DQUERY_OCCLUSION\n", iface);

    return sizeof(DWORD);
}

static WINED3DQUERYTYPE  WINAPI IWineD3DQueryImpl_GetType(IWineD3DQuery* iface){
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;
    return This->type;
}


static HRESULT  WINAPI IWineD3DEventQueryImpl_Issue(IWineD3DQuery* iface,  DWORD dwIssueFlags) {
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;

    TRACE("(%p) : dwIssueFlags %#x, type D3DQUERY_EVENT\n", This, dwIssueFlags);
    if (dwIssueFlags & WINED3DISSUE_END)
    {
        WineQueryEventData *query_data = (WineQueryEventData *)This->extendedData;

        if (query_data->ctx->tid != GetCurrentThreadId())
        {
            /* GL fences can be used only from the context that created them,
             * so if a different context is active, don't bother setting the query. The penalty
             * of a context switch is most likely higher than the gain of a correct query result
             *
             * If the query is used from a different thread, don't bother creating a multithread
             * context - there's no point in doing that as the query would be unusable anyway
             */
            WARN("Query context not active\n");
        }
        else
        {
            ActivateContext(This->wineD3DDevice, query_data->ctx->surface, CTXUSAGE_RESOURCELOAD);

            ENTER_GL();

            if (GL_SUPPORT(APPLE_FENCE))
            {
                GL_EXTCALL(glSetFenceAPPLE(query_data->fenceId));
                checkGLcall("glSetFenceAPPLE");
            }
            else if (GL_SUPPORT(NV_FENCE))
            {
                GL_EXTCALL(glSetFenceNV(query_data->fenceId, GL_ALL_COMPLETED_NV));
                checkGLcall("glSetFenceNV");
            }

            LEAVE_GL();
        }
    } else if(dwIssueFlags & WINED3DISSUE_BEGIN) {
        /* Started implicitly at device creation */
        ERR("Event query issued with START flag - what to do?\n");
    }

    if(dwIssueFlags & WINED3DISSUE_BEGIN) {
        This->state = QUERY_BUILDING;
    } else {
        This->state = QUERY_SIGNALLED;
    }

    return WINED3D_OK;
}

static HRESULT  WINAPI IWineD3DOcclusionQueryImpl_Issue(IWineD3DQuery* iface,  DWORD dwIssueFlags) {
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;

    if (GL_SUPPORT(ARB_OCCLUSION_QUERY))
    {
        WineQueryOcclusionData *query_data = (WineQueryOcclusionData *)This->extendedData;

        if (query_data->ctx->tid != GetCurrentThreadId())
        {
            FIXME("Not the owning context, can't start query.\n");
        }
        else
        {
            ActivateContext(This->wineD3DDevice, query_data->ctx->surface, CTXUSAGE_RESOURCELOAD);

            ENTER_GL();
            /* This is allowed according to msdn and our tests. Reset the query and restart */
            if (dwIssueFlags & WINED3DISSUE_BEGIN) {
                if(This->state == QUERY_BUILDING) {
                    GL_EXTCALL(glEndQueryARB(GL_SAMPLES_PASSED_ARB));
                    checkGLcall("glEndQuery()");
                }

                GL_EXTCALL(glBeginQueryARB(GL_SAMPLES_PASSED_ARB, query_data->queryId));
                checkGLcall("glBeginQuery()");
            }
            if (dwIssueFlags & WINED3DISSUE_END) {
                /* Msdn says _END on a non-building occlusion query returns an error, but
                 * our tests show that it returns OK. But OpenGL doesn't like it, so avoid
                 * generating an error
                 */
                if(This->state == QUERY_BUILDING) {
                    GL_EXTCALL(glEndQueryARB(GL_SAMPLES_PASSED_ARB));
                    checkGLcall("glEndQuery()");
                }
            }
            LEAVE_GL();
        }
    } else {
        FIXME("(%p) : Occlusion queries not supported\n", This);
    }

    if(dwIssueFlags & WINED3DISSUE_BEGIN) {
        This->state = QUERY_BUILDING;
    } else {
        This->state = QUERY_SIGNALLED;
    }
    return WINED3D_OK; /* can be WINED3DERR_INVALIDCALL.    */
}

static HRESULT  WINAPI IWineD3DQueryImpl_Issue(IWineD3DQuery* iface,  DWORD dwIssueFlags){
    IWineD3DQueryImpl *This = (IWineD3DQueryImpl *)iface;

    TRACE("(%p) : dwIssueFlags %#x, type %#x\n", This, dwIssueFlags, This->type);

    /* The fixme is printed when the app asks for the resulting data */
    WARN("(%p) : Unhandled query type %#x\n", This, This->type);

    if(dwIssueFlags & WINED3DISSUE_BEGIN) {
        This->state = QUERY_BUILDING;
    } else {
        This->state = QUERY_SIGNALLED;
    }

    return WINED3D_OK; /* can be WINED3DERR_INVALIDCALL.    */
}


/**********************************************************
 * IWineD3DQuery VTbl follows
 **********************************************************/

const IWineD3DQueryVtbl IWineD3DQuery_Vtbl =
{
    /*** IUnknown methods ***/
    IWineD3DQueryImpl_QueryInterface,
    IWineD3DQueryImpl_AddRef,
    IWineD3DQueryImpl_Release,
     /*** IWineD3Dquery methods ***/
    IWineD3DQueryImpl_GetParent,
    IWineD3DQueryImpl_GetDevice,
    IWineD3DQueryImpl_GetData,
    IWineD3DQueryImpl_GetDataSize,
    IWineD3DQueryImpl_GetType,
    IWineD3DQueryImpl_Issue
};

const IWineD3DQueryVtbl IWineD3DEventQuery_Vtbl =
{
    /*** IUnknown methods ***/
    IWineD3DQueryImpl_QueryInterface,
    IWineD3DQueryImpl_AddRef,
    IWineD3DQueryImpl_Release,
    /*** IWineD3Dquery methods ***/
    IWineD3DQueryImpl_GetParent,
    IWineD3DQueryImpl_GetDevice,
    IWineD3DEventQueryImpl_GetData,
    IWineD3DEventQueryImpl_GetDataSize,
    IWineD3DQueryImpl_GetType,
    IWineD3DEventQueryImpl_Issue
};

const IWineD3DQueryVtbl IWineD3DOcclusionQuery_Vtbl =
{
    /*** IUnknown methods ***/
    IWineD3DQueryImpl_QueryInterface,
    IWineD3DQueryImpl_AddRef,
    IWineD3DQueryImpl_Release,
    /*** IWineD3Dquery methods ***/
    IWineD3DQueryImpl_GetParent,
    IWineD3DQueryImpl_GetDevice,
    IWineD3DOcclusionQueryImpl_GetData,
    IWineD3DOcclusionQueryImpl_GetDataSize,
    IWineD3DQueryImpl_GetType,
    IWineD3DOcclusionQueryImpl_Issue
};