/**************************************************************************
 *
 * Copyright 2012-2021 VMware, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 **************************************************************************/

/*
 * Resource.cpp --
 *    Functions that manipulate GPU resources.
 */


#include "Resource.h"
#include "Format.h"
#include "State.h"
#include "Query.h"

#include "Debug.h"

#include "util/u_math.h"
#include "util/u_rect.h"
#include "util/u_surface.h"


/*
 * ----------------------------------------------------------------------
 *
 * CalcPrivateResourceSize --
 *
 *    The CalcPrivateResourceSize function determines the size of
 *    the user-mode display driver's private region of memory
 *    (that is, the size of internal driver structures, not the
 *    size of the resource video memory).
 *
 * ----------------------------------------------------------------------
 */

SIZE_T APIENTRY
CalcPrivateResourceSize(D3D10DDI_HDEVICE hDevice,                                // IN
                        __in const D3D10DDIARG_CREATERESOURCE *pCreateResource)  // IN
{
   LOG_ENTRYPOINT();
   return sizeof(Resource);
}


static unsigned
translate_resource_usage( unsigned usage )
{
   unsigned resource_usage = 0;

   switch (usage) {
   case D3D10_DDI_USAGE_DEFAULT:
      resource_usage = PIPE_USAGE_DEFAULT;
      break;
   case D3D10_DDI_USAGE_IMMUTABLE:
      resource_usage = PIPE_USAGE_IMMUTABLE;
      break;
   case D3D10_DDI_USAGE_DYNAMIC:
      resource_usage = PIPE_USAGE_DYNAMIC;
      break;
   case D3D10_DDI_USAGE_STAGING:
      resource_usage = PIPE_USAGE_STAGING;
      break;
   default:
      assert(0);
      break;
   }

   return resource_usage;
}


static unsigned
translate_resource_flags(UINT flags)
{
   unsigned bind = 0;

   if (flags & D3D10_DDI_BIND_VERTEX_BUFFER)
      bind |= PIPE_BIND_VERTEX_BUFFER;

   if (flags & D3D10_DDI_BIND_INDEX_BUFFER)
      bind |= PIPE_BIND_INDEX_BUFFER;

   if (flags & D3D10_DDI_BIND_CONSTANT_BUFFER)
      bind |= PIPE_BIND_CONSTANT_BUFFER;

   if (flags & D3D10_DDI_BIND_SHADER_RESOURCE)
      bind |= PIPE_BIND_SAMPLER_VIEW;

   if (flags & D3D10_DDI_BIND_RENDER_TARGET)
      bind |= PIPE_BIND_RENDER_TARGET;

   if (flags & D3D10_DDI_BIND_DEPTH_STENCIL)
      bind |= PIPE_BIND_DEPTH_STENCIL;

   if (flags & D3D10_DDI_BIND_STREAM_OUTPUT)
      bind |= PIPE_BIND_STREAM_OUTPUT;

   return bind;
}


static enum pipe_texture_target
translate_texture_target( D3D10DDIRESOURCE_TYPE ResourceDimension,
                             UINT ArraySize)
{
   assert(ArraySize >= 1);
   switch(ResourceDimension) {
   case D3D10DDIRESOURCE_BUFFER:
      assert(ArraySize == 1);
      return PIPE_BUFFER;
   case D3D10DDIRESOURCE_TEXTURE1D:
      return ArraySize > 1 ? PIPE_TEXTURE_1D_ARRAY : PIPE_TEXTURE_1D;
   case D3D10DDIRESOURCE_TEXTURE2D:
      return ArraySize > 1 ? PIPE_TEXTURE_2D_ARRAY : PIPE_TEXTURE_2D;
   case D3D10DDIRESOURCE_TEXTURE3D:
      assert(ArraySize == 1);
      return PIPE_TEXTURE_3D;
   case D3D10DDIRESOURCE_TEXTURECUBE:
      assert(ArraySize % 6 == 0);
      return ArraySize > 6 ? PIPE_TEXTURE_CUBE_ARRAY : PIPE_TEXTURE_CUBE;
   default:
      assert(0);
      return PIPE_TEXTURE_1D;
   }
}


static void
subResourceBox(struct pipe_resource *resource, // IN
                 UINT SubResource,  // IN
                 unsigned *pLevel, // OUT
                 struct pipe_box *pBox)   // OUT
{
   UINT MipLevels = resource->last_level + 1;
   unsigned layer;
   unsigned width;
   unsigned height;
   unsigned depth;

   *pLevel = SubResource % MipLevels;
   layer = SubResource / MipLevels;

   width  = u_minify(resource->width0,  *pLevel);
   height = u_minify(resource->height0, *pLevel);
   depth  = u_minify(resource->depth0,  *pLevel);

   pBox->x = 0;
   pBox->y = 0;
   pBox->z = 0 + layer;
   pBox->width  = width;
   pBox->height = height;
   pBox->depth  = depth;
}


/*
 * ----------------------------------------------------------------------
 *
 * CreateResource --
 *
 *    The CreateResource function creates a resource.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
CreateResource(D3D10DDI_HDEVICE hDevice,                                // IN
               __in const D3D10DDIARG_CREATERESOURCE *pCreateResource,  // IN
               D3D10DDI_HRESOURCE hResource,                            // IN
               D3D10DDI_HRTRESOURCE hRTResource)                        // IN
{
   LOG_ENTRYPOINT();

   if ((pCreateResource->MiscFlags & D3D10_DDI_RESOURCE_MISC_SHARED) ||
       (pCreateResource->pPrimaryDesc &&
        pCreateResource->pPrimaryDesc->DriverFlags & DXGI_DDI_PRIMARY_OPTIONAL)) {

      DebugPrintf("%s(%dx%dx%d hResource=%p)\n",
	       __FUNCTION__,
	       pCreateResource->pMipInfoList[0].TexelWidth,
	       pCreateResource->pMipInfoList[0].TexelHeight,
	       pCreateResource->pMipInfoList[0].TexelDepth,
	       hResource.pDrvPrivate);
      DebugPrintf("  ResourceDimension = %u\n",
	       pCreateResource->ResourceDimension);
      DebugPrintf("  Usage = %u\n",
	       pCreateResource->Usage);
      DebugPrintf("  BindFlags = 0x%x\n",
	       pCreateResource->BindFlags);
      DebugPrintf("  MapFlags = 0x%x\n",
	       pCreateResource->MapFlags);
      DebugPrintf("  MiscFlags = 0x%x\n",
	       pCreateResource->MiscFlags);
      DebugPrintf("  Format = %s\n",
	       FormatToName(pCreateResource->Format));
      DebugPrintf("  SampleDesc.Count = %u\n", pCreateResource->SampleDesc.Count);
      DebugPrintf("  SampleDesc.Quality = %u\n", pCreateResource->SampleDesc.Quality);
      DebugPrintf("  MipLevels = %u\n", pCreateResource->MipLevels);
      DebugPrintf("  ArraySize = %u\n", pCreateResource->ArraySize);
      DebugPrintf("  pPrimaryDesc = %p\n", pCreateResource->pPrimaryDesc);
      if (pCreateResource->pPrimaryDesc) {
	 DebugPrintf("    Flags = 0x%x\n",
		  pCreateResource->pPrimaryDesc->Flags);
	 DebugPrintf("    VidPnSourceId = %u\n", pCreateResource->pPrimaryDesc->VidPnSourceId);
	 DebugPrintf("    ModeDesc.Width = %u\n", pCreateResource->pPrimaryDesc->ModeDesc.Width);
	 DebugPrintf("    ModeDesc.Height = %u\n", pCreateResource->pPrimaryDesc->ModeDesc.Height);
	 DebugPrintf("    ModeDesc.Format = %u)\n",
		  pCreateResource->pPrimaryDesc->ModeDesc.Format);
	 DebugPrintf("    ModeDesc.RefreshRate.Numerator = %u\n", pCreateResource->pPrimaryDesc->ModeDesc.RefreshRate.Numerator);
	 DebugPrintf("    ModeDesc.RefreshRate.Denominator = %u\n", pCreateResource->pPrimaryDesc->ModeDesc.RefreshRate.Denominator);
	 DebugPrintf("    ModeDesc.ScanlineOrdering = %u\n",
		  pCreateResource->pPrimaryDesc->ModeDesc.ScanlineOrdering);
	 DebugPrintf("    ModeDesc.Rotation = %u\n",
		  pCreateResource->pPrimaryDesc->ModeDesc.Rotation);
	 DebugPrintf("    ModeDesc.Scaling = %u\n",
		  pCreateResource->pPrimaryDesc->ModeDesc.Scaling);
	 DebugPrintf("    DriverFlags = 0x%x\n",
		  pCreateResource->pPrimaryDesc->DriverFlags);
      }

   }

   struct pipe_context *pipe = CastPipeContext(hDevice);
   struct pipe_screen *screen = pipe->screen;

   Resource *pResource = CastResource(hResource);

   memset(pResource, 0, sizeof *pResource);

#if 0
   if (pCreateResource->pPrimaryDesc) {
      pCreateResource->pPrimaryDesc->DriverFlags = DXGI_DDI_PRIMARY_DRIVER_FLAG_NO_SCANOUT;
      if (!(pCreateResource->pPrimaryDesc->DriverFlags & DXGI_DDI_PRIMARY_OPTIONAL)) {
         // http://msdn.microsoft.com/en-us/library/windows/hardware/ff568846.aspx
         SetError(hDevice, DXGI_DDI_ERR_UNSUPPORTED);
         return;
      }
   }
#endif

   pResource->Format = pCreateResource->Format;
   pResource->MipLevels = pCreateResource->MipLevels;

   struct pipe_resource templat;

   memset(&templat, 0, sizeof templat);

   templat.target     = translate_texture_target( pCreateResource->ResourceDimension,
                                                  pCreateResource->ArraySize );

   if (pCreateResource->Format == DXGI_FORMAT_UNKNOWN) {
      assert(pCreateResource->ResourceDimension == D3D10DDIRESOURCE_BUFFER);
      templat.format = PIPE_FORMAT_R8_UINT;
   } else {
      BOOL bindDepthStencil = !!(pCreateResource->BindFlags & D3D10_DDI_BIND_DEPTH_STENCIL);
      templat.format = FormatTranslate(pCreateResource->Format, bindDepthStencil);
   }

   templat.width0     = pCreateResource->pMipInfoList[0].TexelWidth;
   templat.height0    = pCreateResource->pMipInfoList[0].TexelHeight;
   templat.depth0     = pCreateResource->pMipInfoList[0].TexelDepth;
   templat.array_size = pCreateResource->ArraySize;
   templat.last_level = pCreateResource->MipLevels - 1;
   templat.nr_samples = pCreateResource->SampleDesc.Count;
   templat.nr_storage_samples = pCreateResource->SampleDesc.Count;
   templat.bind       = translate_resource_flags(pCreateResource->BindFlags);
   templat.usage      = translate_resource_usage(pCreateResource->Usage);

   if (templat.target != PIPE_BUFFER) {
      if (!screen->is_format_supported(screen,
                                       templat.format,
                                       templat.target,
                                       templat.nr_samples,
                                       templat.nr_storage_samples,
                                       templat.bind)) {
         debug_printf("%s: unsupported format %s\n",
                     __FUNCTION__, util_format_name(templat.format));
         SetError(hDevice, E_OUTOFMEMORY);
         return;
      }
   }

   pResource->resource = screen->resource_create(screen, &templat);
   if (!pResource) {
      DebugPrintf("%s: failed to create resource\n", __FUNCTION__);
      SetError(hDevice, E_OUTOFMEMORY);
      return;
   }

   pResource->NumSubResources = pCreateResource->MipLevels * pCreateResource->ArraySize;
   pResource->transfers = (struct pipe_transfer **)calloc(pResource->NumSubResources,
                                                          sizeof *pResource->transfers);

   if (pCreateResource->pInitialDataUP) {
      for (UINT SubResource = 0; SubResource < pResource->NumSubResources; ++SubResource) {
         const D3D10_DDIARG_SUBRESOURCE_UP* pInitialDataUP =
               &pCreateResource->pInitialDataUP[SubResource];

         unsigned level;
         struct pipe_box box;
         subResourceBox(pResource->resource, SubResource, &level, &box);

         struct pipe_transfer *transfer;
         void *map;
         map = pipe->transfer_map(pipe,
                                  pResource->resource,
                                  level,
                                  PIPE_MAP_WRITE |
                                  PIPE_MAP_UNSYNCHRONIZED,
                                  &box,
                                  &transfer);
         assert(map);
         if (map) {
            for (int z = 0; z < box.depth; ++z) {
               ubyte *dst = (ubyte*)map + z*transfer->layer_stride;
               const ubyte *src = (const ubyte*)pInitialDataUP->pSysMem + z*pInitialDataUP->SysMemSlicePitch;
               util_copy_rect(dst,
                              templat.format,
                              transfer->stride,
                              0, 0, box.width, box.height,
                              src,
                              pInitialDataUP->SysMemPitch,
                              0, 0);
            }
            pipe_transfer_unmap(pipe, transfer);
         }
      }
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * CalcPrivateOpenedResourceSize --
 *
 *    The CalcPrivateOpenedResourceSize function determines the size
 *    of the user-mode display driver's private shared region of memory
 *    (that is, the size of internal driver structures, not the size
 *    of the resource video memory) for an opened resource.
 *
 * ----------------------------------------------------------------------
 */

SIZE_T APIENTRY
CalcPrivateOpenedResourceSize(D3D10DDI_HDEVICE hDevice,                             // IN
                              __in const D3D10DDIARG_OPENRESOURCE *pOpenResource)   // IN
{
   return sizeof(Resource);
}


/*
 * ----------------------------------------------------------------------
 *
 * OpenResource --
 *
 *    The OpenResource function opens a shared resource.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
OpenResource(D3D10DDI_HDEVICE hDevice,                            // IN
             __in const D3D10DDIARG_OPENRESOURCE *pOpenResource,  // IN
             D3D10DDI_HRESOURCE hResource,                        // IN
             D3D10DDI_HRTRESOURCE hRTResource)                    // IN
{
   LOG_UNSUPPORTED_ENTRYPOINT();
   SetError(hDevice, E_OUTOFMEMORY);
}


/*
 * ----------------------------------------------------------------------
 *
 * DestroyResource --
 *
 *    The DestroyResource function destroys the specified resource
 *    object. The resource object can be destoyed only if it is not
 *    currently bound to a display device, and if all views that
 *    refer to the resource are also destroyed.
 *
 * ----------------------------------------------------------------------
 */


void APIENTRY
DestroyResource(D3D10DDI_HDEVICE hDevice,       // IN
                D3D10DDI_HRESOURCE hResource)   // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   Resource *pResource = CastResource(hResource);

   if (pResource->so_target) {
      pipe_so_target_reference(&pResource->so_target, NULL);
   }

   for (UINT SubResource = 0; SubResource < pResource->NumSubResources; ++SubResource) {
      if (pResource->transfers[SubResource]) {
         pipe_transfer_unmap(pipe, pResource->transfers[SubResource]);
         pResource->transfers[SubResource] = NULL;
      }
   }
   free(pResource->transfers);

   pipe_resource_reference(&pResource->resource, NULL);
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceMap --
 *
 *    The ResourceMap function maps a subresource of a resource.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ResourceMap(D3D10DDI_HDEVICE hDevice,                                // IN
            D3D10DDI_HRESOURCE hResource,                            // IN
            UINT SubResource,                                        // IN
            D3D10_DDI_MAP DDIMap,                                    // IN
            UINT Flags,                                              // IN
            __out D3D10DDI_MAPPED_SUBRESOURCE *pMappedSubResource)   // OUT
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   Resource *pResource = CastResource(hResource);
   struct pipe_resource *resource = pResource->resource;

   unsigned usage;
   switch (DDIMap) {
   case D3D10_DDI_MAP_READ:
      usage = PIPE_MAP_READ;
      break;
   case D3D10_DDI_MAP_READWRITE:
      usage = PIPE_MAP_READ | PIPE_MAP_WRITE;
      break;
   case D3D10_DDI_MAP_WRITE:
      usage = PIPE_MAP_WRITE;
      break;
   case D3D10_DDI_MAP_WRITE_DISCARD:
      usage = PIPE_MAP_WRITE;
      if (resource->last_level == 0 && resource->array_size == 1) {
         usage |= PIPE_MAP_DISCARD_WHOLE_RESOURCE;
      } else {
         usage |= PIPE_MAP_DISCARD_RANGE;
      }
      break;
   case D3D10_DDI_MAP_WRITE_NOOVERWRITE:
      usage = PIPE_MAP_WRITE | PIPE_MAP_UNSYNCHRONIZED;
      break;
   default:
      assert(0);
      return;
   }

   assert(SubResource < pResource->NumSubResources);

   unsigned level;
   struct pipe_box box;
   subResourceBox(resource, SubResource, &level, &box);

   assert(!pResource->transfers[SubResource]);

   void *map;
   map = pipe->transfer_map(pipe,
                            resource,
                            level,
                            usage,
                            &box,
                            &pResource->transfers[SubResource]);
   if (!map) {
      DebugPrintf("%s: failed to map resource\n", __FUNCTION__);
      SetError(hDevice, E_FAIL);
      return;
   }

   pMappedSubResource->pData = map;
   pMappedSubResource->RowPitch = pResource->transfers[SubResource]->stride;
   pMappedSubResource->DepthPitch = pResource->transfers[SubResource]->layer_stride;
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceUnmap --
 *
 *    The ResourceUnmap function unmaps a subresource of a resource.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ResourceUnmap(D3D10DDI_HDEVICE hDevice,      // IN
              D3D10DDI_HRESOURCE hResource,  // IN
              UINT SubResource)              // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   Resource *pResource = CastResource(hResource);

   assert(SubResource < pResource->NumSubResources);

   if (pResource->transfers[SubResource]) {
      pipe_transfer_unmap(pipe, pResource->transfers[SubResource]);
      pResource->transfers[SubResource] = NULL;
   }
}


/*
 *----------------------------------------------------------------------
 *
 * areResourcesCompatible --
 *
 *      Check whether two resources can be safely passed to
 *      pipe_context::resource_copy_region method.
 *
 * Results:
 *      As above.
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

static bool
areResourcesCompatible(const struct pipe_resource *src_resource, // IN
                       const struct pipe_resource *dst_resource) // IN
{
   if (src_resource->format == dst_resource->format) {
      /*
       * Trivial.
       */

      return TRUE;
   } else if (src_resource->target == PIPE_BUFFER &&
              dst_resource->target == PIPE_BUFFER) {
      /*
       * Buffer resources are merely a collection of bytes.
       */

      return TRUE;
   } else {
      /*
       * Check whether the formats are supported by
       * the resource_copy_region method.
       */

      const struct util_format_description *src_format_desc;
      const struct util_format_description *dst_format_desc;

      src_format_desc = util_format_description(src_resource->format);
      dst_format_desc = util_format_description(dst_resource->format);

      assert(src_format_desc->block.width  == dst_format_desc->block.width);
      assert(src_format_desc->block.height == dst_format_desc->block.height);
      assert(src_format_desc->block.bits   == dst_format_desc->block.bits);

      return util_is_format_compatible(src_format_desc, dst_format_desc);
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceCopy --
 *
 *    The ResourceCopy function copies an entire source
 *    resource to a destination resource.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ResourceCopy(D3D10DDI_HDEVICE hDevice,          // IN
             D3D10DDI_HRESOURCE hDstResource,   // IN
             D3D10DDI_HRESOURCE hSrcResource)   // IN
{
   LOG_ENTRYPOINT();

   Device *pDevice = CastDevice(hDevice);
   if (!CheckPredicate(pDevice)) {
      return;
   }

   struct pipe_context *pipe = pDevice->pipe;
   Resource *pDstResource = CastResource(hDstResource);
   Resource *pSrcResource = CastResource(hSrcResource);
   struct pipe_resource *dst_resource = pDstResource->resource;
   struct pipe_resource *src_resource = pSrcResource->resource;
   bool compatible;

   assert(dst_resource->target == src_resource->target);
   assert(dst_resource->width0 == src_resource->width0);
   assert(dst_resource->height0 == src_resource->height0);
   assert(dst_resource->depth0 == src_resource->depth0);
   assert(dst_resource->last_level == src_resource->last_level);
   assert(dst_resource->array_size == src_resource->array_size);

   compatible = areResourcesCompatible(src_resource, dst_resource);

   /* could also use one 3d copy for arrays */
   for (unsigned layer = 0; layer < dst_resource->array_size; ++layer) {
      for (unsigned level = 0; level <= dst_resource->last_level; ++level) {
         struct pipe_box box;
         box.x = 0;
         box.y = 0;
         box.z = 0 + layer;
         box.width  = u_minify(dst_resource->width0,  level);
         box.height = u_minify(dst_resource->height0, level);
         box.depth  = u_minify(dst_resource->depth0,  level);

	 if (compatible) {
            pipe->resource_copy_region(pipe,
                                       dst_resource, level,
                                       0, 0, layer,
                                       src_resource, level,
                                       &box);
         } else {
            util_resource_copy_region(pipe,
                                      dst_resource, level,
                                      0, 0, layer,
                                      src_resource, level,
                                      &box);
         }
      }
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceCopyRegion --
 *
 *    The ResourceCopyRegion function copies a source subresource
 *    region to a location on a destination subresource.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ResourceCopyRegion(D3D10DDI_HDEVICE hDevice,                // IN
                   D3D10DDI_HRESOURCE hDstResource,         // IN
                   UINT DstSubResource,                     // IN
                   UINT DstX,                               // IN
                   UINT DstY,                               // IN
                   UINT DstZ,                               // IN
                   D3D10DDI_HRESOURCE hSrcResource,         // IN
                   UINT SrcSubResource,                     // IN
                   __in_opt const D3D10_DDI_BOX *pSrcBox)   // IN (optional)
{
   LOG_ENTRYPOINT();

   Device *pDevice = CastDevice(hDevice);
   if (!CheckPredicate(pDevice)) {
      return;
   }

   struct pipe_context *pipe = pDevice->pipe;
   Resource *pDstResource = CastResource(hDstResource);
   Resource *pSrcResource = CastResource(hSrcResource);
   struct pipe_resource *dst_resource = pDstResource->resource;
   struct pipe_resource *src_resource = pSrcResource->resource;

   unsigned dst_level = DstSubResource % (dst_resource->last_level + 1);
   unsigned dst_layer = DstSubResource / (dst_resource->last_level + 1);
   unsigned src_level = SrcSubResource % (src_resource->last_level + 1);
   unsigned src_layer = SrcSubResource / (src_resource->last_level + 1);

   struct pipe_box src_box;
   if (pSrcBox) {
      src_box.x = pSrcBox->left;
      src_box.y = pSrcBox->top;
      src_box.z = pSrcBox->front + src_layer;
      src_box.width  = pSrcBox->right  - pSrcBox->left;
      src_box.height = pSrcBox->bottom - pSrcBox->top;
      src_box.depth  = pSrcBox->back   - pSrcBox->front;
   } else {
      src_box.x = 0;
      src_box.y = 0;
      src_box.z = 0 + src_layer;
      src_box.width  = u_minify(src_resource->width0,  src_level);
      src_box.height = u_minify(src_resource->height0, src_level);
      src_box.depth  = u_minify(src_resource->depth0,  src_level);
   }

   if (areResourcesCompatible(src_resource, dst_resource)) {
      pipe->resource_copy_region(pipe,
                                 dst_resource, dst_level,
                                 DstX, DstY, DstZ + dst_layer,
                                 src_resource, src_level,
                                 &src_box);
   } else {
      util_resource_copy_region(pipe,
                                dst_resource, dst_level,
                                DstX, DstY, DstZ + dst_layer,
                                src_resource, src_level,
                                &src_box);
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceResolveSubResource --
 *
 *    The ResourceResolveSubResource function resolves
 *    multiple samples to one pixel.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ResourceResolveSubResource(D3D10DDI_HDEVICE hDevice,        // IN
                           D3D10DDI_HRESOURCE hDstResource, // IN
                           UINT DstSubResource,             // IN
                           D3D10DDI_HRESOURCE hSrcResource, // IN
                           UINT SrcSubResource,             // IN
                           DXGI_FORMAT ResolveFormat)       // IN
{
   LOG_UNSUPPORTED_ENTRYPOINT();
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceIsStagingBusy --
 *
 *    The ResourceIsStagingBusy function determines whether a
 *    resource is currently being used by the graphics pipeline.
 *
 * ----------------------------------------------------------------------
 */

BOOL APIENTRY
ResourceIsStagingBusy(D3D10DDI_HDEVICE hDevice,       // IN
                      D3D10DDI_HRESOURCE hResource)   // IN
{
   LOG_ENTRYPOINT();

   /* ignore */

   return FALSE;
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceReadAfterWriteHazard --
 *
 *    The ResourceReadAfterWriteHazard function informs the user-mode
 *    display driver that the specified resource was used as an output
 *    from the graphics processing unit (GPU) and that the resource
 *    will be used as an input to the GPU.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ResourceReadAfterWriteHazard(D3D10DDI_HDEVICE hDevice,      // IN
                             D3D10DDI_HRESOURCE hResource)  // IN
{
   LOG_ENTRYPOINT();

   /* Not actually necessary */
}


/*
 * ----------------------------------------------------------------------
 *
 * ResourceUpdateSubResourceUP --
 *
 *    The ResourceUpdateSubresourceUP function updates a
 *    destination subresource region from a source
 *    system memory region.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ResourceUpdateSubResourceUP(D3D10DDI_HDEVICE hDevice,                // IN
                            D3D10DDI_HRESOURCE hDstResource,         // IN
                            UINT DstSubResource,                     // IN
                            __in_opt const D3D10_DDI_BOX *pDstBox,   // IN
                            __in const void *pSysMemUP,              // IN
                            UINT RowPitch,                           // IN
                            UINT DepthPitch)                         // IN
{
   LOG_ENTRYPOINT();

   Device *pDevice = CastDevice(hDevice);
   if (!CheckPredicate(pDevice)) {
      return;
   }

   struct pipe_context *pipe = pDevice->pipe;
   struct pipe_resource *dst_resource = CastPipeResource(hDstResource);

   unsigned level;
   struct pipe_box box;

   if (pDstBox) {
      UINT DstMipLevels = dst_resource->last_level + 1;
      level = DstSubResource % DstMipLevels;
      unsigned dst_layer = DstSubResource / DstMipLevels;
      box.x = pDstBox->left;
      box.y = pDstBox->top;
      box.z = pDstBox->front + dst_layer;
      box.width  = pDstBox->right  - pDstBox->left;
      box.height = pDstBox->bottom - pDstBox->top;
      box.depth  = pDstBox->back   - pDstBox->front;
   } else {
      subResourceBox(dst_resource, DstSubResource, &level, &box);
   }

   struct pipe_transfer *transfer;
   void *map;
   map = pipe->transfer_map(pipe,
                            dst_resource,
                            level,
                            PIPE_MAP_WRITE | PIPE_MAP_DISCARD_RANGE,
                            &box,
                            &transfer);
   assert(map);
   if (map) {
      for (int z = 0; z < box.depth; ++z) {
         ubyte *dst = (ubyte*)map + z*transfer->layer_stride;
         const ubyte *src = (const ubyte*)pSysMemUP + z*DepthPitch;
         util_copy_rect(dst,
                        dst_resource->format,
                        transfer->stride,
                        0, 0, box.width, box.height,
                        src,
                        RowPitch,
                        0, 0);
      }
      pipe_transfer_unmap(pipe, transfer);
   }
}