OutputMerger.cpp

/**************************************************************************
 *
 * 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.
 *
 **************************************************************************/

/*
 * OutputMerger.cpp --
 *    Functions that manipulate the output merger state.
 */


#include "OutputMerger.h"
#include "State.h"

#include "Debug.h"
#include "Format.h"

#include "util/u_framebuffer.h"
#include "util/format/u_format.h"


/*
 * ----------------------------------------------------------------------
 *
 * CalcPrivateRenderTargetViewSize --
 *
 *    The CalcPrivateRenderTargetViewSize 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) for a render target view.
 *
 * ----------------------------------------------------------------------
 */


SIZE_T APIENTRY
CalcPrivateRenderTargetViewSize(
   D3D10DDI_HDEVICE hDevice,                                               // IN
   __in const D3D10DDIARG_CREATERENDERTARGETVIEW *pCreateRenderTargetView) // IN
{
   return sizeof(RenderTargetView);
}


/*
 * ----------------------------------------------------------------------
 *
 * CreateRenderTargetView --
 *
 *    The CreateRenderTargetView function creates a render target view.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
CreateRenderTargetView(
   D3D10DDI_HDEVICE hDevice,                                               // IN
   __in const D3D10DDIARG_CREATERENDERTARGETVIEW *pCreateRenderTargetView, // IN
   D3D10DDI_HRENDERTARGETVIEW hRenderTargetView,                           // IN
   D3D10DDI_HRTRENDERTARGETVIEW hRTRenderTargetView)                       // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   struct pipe_resource *resource = CastPipeResource(pCreateRenderTargetView->hDrvResource);
   RenderTargetView *pRTView = CastRenderTargetView(hRenderTargetView);

   struct pipe_surface desc;

   memset(&desc, 0, sizeof desc);
   desc.format = FormatTranslate(pCreateRenderTargetView->Format, FALSE);

   switch (pCreateRenderTargetView->ResourceDimension) {
   case D3D10DDIRESOURCE_BUFFER:
      desc.u.buf.first_element = pCreateRenderTargetView->Buffer.FirstElement;
      desc.u.buf.last_element = pCreateRenderTargetView->Buffer.NumElements - 1 +
                                   desc.u.buf.first_element;
      break;
   case D3D10DDIRESOURCE_TEXTURE1D:
      ASSERT(pCreateRenderTargetView->Tex1D.ArraySize != (UINT)-1);
      desc.u.tex.level = pCreateRenderTargetView->Tex1D.MipSlice;
      desc.u.tex.first_layer = pCreateRenderTargetView->Tex1D.FirstArraySlice;
      desc.u.tex.last_layer = pCreateRenderTargetView->Tex1D.ArraySize - 1 +
                                 desc.u.tex.first_layer;
      break;
   case D3D10DDIRESOURCE_TEXTURE2D:
      ASSERT(pCreateRenderTargetView->Tex2D.ArraySize != (UINT)-1);
      desc.u.tex.level = pCreateRenderTargetView->Tex2D.MipSlice;
      desc.u.tex.first_layer = pCreateRenderTargetView->Tex2D.FirstArraySlice;
      desc.u.tex.last_layer = pCreateRenderTargetView->Tex2D.ArraySize - 1 +
                                 desc.u.tex.first_layer;
      break;
   case D3D10DDIRESOURCE_TEXTURE3D:
      desc.u.tex.level = pCreateRenderTargetView->Tex3D.MipSlice;
      desc.u.tex.first_layer = pCreateRenderTargetView->Tex3D.FirstW;
      desc.u.tex.last_layer = pCreateRenderTargetView->Tex3D.WSize - 1 +
                                 desc.u.tex.first_layer;
      break;
   case D3D10DDIRESOURCE_TEXTURECUBE:
      ASSERT(pCreateRenderTargetView->TexCube.ArraySize != (UINT)-1);
      desc.u.tex.level = pCreateRenderTargetView->TexCube.MipSlice;
      desc.u.tex.first_layer = pCreateRenderTargetView->TexCube.FirstArraySlice;
      desc.u.tex.last_layer = pCreateRenderTargetView->TexCube.ArraySize - 1 +
                                 desc.u.tex.first_layer;;
      break;
   default:
      ASSERT(0);
      return;
   }

   pRTView->surface = pipe->create_surface(pipe, resource, &desc);
   assert(pRTView->surface);
}


/*
 * ----------------------------------------------------------------------
 *
 * DestroyRenderTargetView --
 *
 *    The DestroyRenderTargetView function destroys the specified
 *    render target view object. The render target view object can
 *    be destoyed only if it is not currently bound to a display device.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
DestroyRenderTargetView(D3D10DDI_HDEVICE hDevice,                       // IN
                        D3D10DDI_HRENDERTARGETVIEW hRenderTargetView)   // IN
{
   LOG_ENTRYPOINT();

   RenderTargetView *pRTView = CastRenderTargetView(hRenderTargetView);

   pipe_surface_reference(&pRTView->surface, NULL);
}


/*
 * ----------------------------------------------------------------------
 *
 * ClearRenderTargetView --
 *
 *    The ClearRenderTargetView function clears the specified
 *    render target view by setting it to a constant value.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ClearRenderTargetView(D3D10DDI_HDEVICE hDevice,                      // IN
                      D3D10DDI_HRENDERTARGETVIEW hRenderTargetView,  // IN
                      FLOAT pColorRGBA[4])                           // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   struct pipe_surface *surface = CastPipeRenderTargetView(hRenderTargetView);
   union pipe_color_union clear_color;

   /*
    * DX10 always uses float clear color but gallium does not.
    * Conversion should just be ordinary conversion. Actual clamping will
    * be done later but need to make sure values exceeding int/uint range
    * are handled correctly.
    */
   if (util_format_is_pure_integer(surface->format)) {
      if (util_format_is_pure_sint(surface->format)) {
         unsigned i;
         /* If only MIN_INT/UINT32 in c++ code would work... */
         int min_int32 = 0x80000000;
         int max_int32 = 0x7fffffff;
         for (i = 0; i < 4; i++) {
            float value = pColorRGBA[i];
            /* This is an expanded clamp to handle NaN and integer conversion. */
            if (util_is_nan(value)) {
               clear_color.i[i] = 0;
            } else if (value <= (float)min_int32) {
               clear_color.i[i] = min_int32;
            } else if (value >= (float)max_int32) {
               clear_color.i[i] = max_int32;
            } else {
               clear_color.i[i] = value;
            }
         }
      }
      else {
         assert(util_format_is_pure_uint(surface->format));
         unsigned i;
         unsigned max_uint32 = 0xffffffffU;
         for (i = 0; i < 4; i++) {
            float value = pColorRGBA[i];
            /* This is an expanded clamp to handle NaN and integer conversion. */
            if (!(value >= 0.0f)) {
               /* Handles NaN. */
               clear_color.ui[i] = 0;
            } else if (value >= (float)max_uint32) {
               clear_color.ui[i] = max_uint32;
            } else {
               clear_color.ui[i] = value;
            }
         }
      }
   }
   else {
      clear_color.f[0] = pColorRGBA[0];
      clear_color.f[1] = pColorRGBA[1];
      clear_color.f[2] = pColorRGBA[2];
      clear_color.f[3] = pColorRGBA[3];
   }

   pipe->clear_render_target(pipe,
                             surface,
                             &clear_color,
                             0, 0,
                             surface->width,
                             surface->height,
                             TRUE);
}


/*
 * ----------------------------------------------------------------------
 *
 * CalcPrivateDepthStencilViewSize --
 *
 *    The CalcPrivateDepthStencilViewSize 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) for a depth stencil view.
 *
 * ----------------------------------------------------------------------
 */

SIZE_T APIENTRY
CalcPrivateDepthStencilViewSize(
   D3D10DDI_HDEVICE hDevice,                                               // IN
   __in const D3D10DDIARG_CREATEDEPTHSTENCILVIEW *pCreateDepthStencilView) // IN
{
   return sizeof(DepthStencilView);
}


/*
 * ----------------------------------------------------------------------
 *
 * CreateDepthStencilView --
 *
 *    The CreateDepthStencilView function creates a depth stencil view.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
CreateDepthStencilView(
   D3D10DDI_HDEVICE hDevice,                                               // IN
   __in const D3D10DDIARG_CREATEDEPTHSTENCILVIEW *pCreateDepthStencilView, // IN
   D3D10DDI_HDEPTHSTENCILVIEW hDepthStencilView,                           // IN
   D3D10DDI_HRTDEPTHSTENCILVIEW hRTDepthStencilView)                       // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   struct pipe_resource *resource = CastPipeResource(pCreateDepthStencilView->hDrvResource);
   DepthStencilView *pDSView = CastDepthStencilView(hDepthStencilView);

   struct pipe_surface desc;

   memset(&desc, 0, sizeof desc);
   desc.format = FormatTranslate(pCreateDepthStencilView->Format, TRUE);

   switch (pCreateDepthStencilView->ResourceDimension) {
   case D3D10DDIRESOURCE_TEXTURE1D:
      ASSERT(pCreateDepthStencilView->Tex1D.ArraySize != (UINT)-1);
      desc.u.tex.level = pCreateDepthStencilView->Tex1D.MipSlice;
      desc.u.tex.first_layer = pCreateDepthStencilView->Tex1D.FirstArraySlice;
      desc.u.tex.last_layer = pCreateDepthStencilView->Tex1D.ArraySize - 1 +
                                 desc.u.tex.first_layer;
      break;
   case D3D10DDIRESOURCE_TEXTURE2D:
      ASSERT(pCreateDepthStencilView->Tex2D.ArraySize != (UINT)-1);
      desc.u.tex.level = pCreateDepthStencilView->Tex2D.MipSlice;
      desc.u.tex.first_layer = pCreateDepthStencilView->Tex2D.FirstArraySlice;
      desc.u.tex.last_layer = pCreateDepthStencilView->Tex2D.ArraySize - 1 +
                                 desc.u.tex.first_layer;
      break;
   case D3D10DDIRESOURCE_TEXTURECUBE:
      ASSERT(pCreateDepthStencilView->TexCube.ArraySize != (UINT)-1);
      desc.u.tex.level = pCreateDepthStencilView->TexCube.MipSlice;
      desc.u.tex.first_layer = pCreateDepthStencilView->TexCube.FirstArraySlice;
      desc.u.tex.last_layer = pCreateDepthStencilView->TexCube.ArraySize - 1 +
                                 desc.u.tex.first_layer;
      break;
   default:
      ASSERT(0);
      return;
   }

   pDSView->surface = pipe->create_surface(pipe, resource, &desc);
   assert(pDSView->surface);
}


/*
 * ----------------------------------------------------------------------
 *
 * DestroyDepthStencilView --
 *
 *    The DestroyDepthStencilView function destroys the specified
 *    depth stencil view object. The depth stencil view object can
 *    be destoyed only if it is not currently bound to a display device.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
DestroyDepthStencilView(D3D10DDI_HDEVICE hDevice,                       // IN
                        D3D10DDI_HDEPTHSTENCILVIEW hDepthStencilView)   // IN
{
   LOG_ENTRYPOINT();

   DepthStencilView *pDSView = CastDepthStencilView(hDepthStencilView);

   pipe_surface_reference(&pDSView->surface, NULL);
}


/*
 * ----------------------------------------------------------------------
 *
 * ClearDepthStencilView --
 *
 *    The ClearDepthStencilView function clears the specified
 *    currently bound depth-stencil view.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
ClearDepthStencilView(D3D10DDI_HDEVICE hDevice,                      // IN
                      D3D10DDI_HDEPTHSTENCILVIEW hDepthStencilView,  // IN
                      UINT Flags,                                    // IN
                      FLOAT Depth,                                   // IN
                      UINT8 Stencil)                                 // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   struct pipe_surface *surface = CastPipeDepthStencilView(hDepthStencilView);

   unsigned flags = 0;
   if (Flags & D3D10_DDI_CLEAR_DEPTH) {
      flags |= PIPE_CLEAR_DEPTH;
   }
   if (Flags & D3D10_DDI_CLEAR_STENCIL) {
      flags |= PIPE_CLEAR_STENCIL;
   }

   pipe->clear_depth_stencil(pipe,
                             surface,
                             flags,
                             Depth,
                             Stencil,
                             0, 0,
                             surface->width,
                             surface->height,
                             TRUE);
}


/*
 * ----------------------------------------------------------------------
 *
 * CalcPrivateBlendStateSize --
 *
 *    The CalcPrivateBlendStateSize 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) for a blend state.
 *
 * ----------------------------------------------------------------------
 */

SIZE_T APIENTRY
CalcPrivateBlendStateSize(D3D10DDI_HDEVICE hDevice,                     // IN
                          __in const D3D10_DDI_BLEND_DESC *pBlendDesc)  // IN
{
   return sizeof(BlendState);
}


/*
 * ----------------------------------------------------------------------
 *
 * CalcPrivateBlendStateSize1 --
 *
 *    The CalcPrivateBlendStateSize 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) for a blend state.
 *
 * ----------------------------------------------------------------------
 */

SIZE_T APIENTRY
CalcPrivateBlendStateSize1(D3D10DDI_HDEVICE hDevice,                     // IN
                           __in const D3D10_1_DDI_BLEND_DESC *pBlendDesc)  // IN
{
   return sizeof(BlendState);
}


/*
 * ----------------------------------------------------------------------
 *
 * translateBlend --
 *
 *   Translate blend function from svga3d to gallium representation.
 *
 * ----------------------------------------------------------------------
 */
static uint
translateBlendOp(D3D10_DDI_BLEND_OP op)
{
   switch (op) {
   case D3D10_DDI_BLEND_OP_ADD:
      return PIPE_BLEND_ADD;
   case D3D10_DDI_BLEND_OP_SUBTRACT:
      return PIPE_BLEND_SUBTRACT;
   case D3D10_DDI_BLEND_OP_REV_SUBTRACT:
      return PIPE_BLEND_REVERSE_SUBTRACT;
   case D3D10_DDI_BLEND_OP_MIN:
      return PIPE_BLEND_MIN;
   case D3D10_DDI_BLEND_OP_MAX:
      return PIPE_BLEND_MAX;
   default:
      assert(0);
      return PIPE_BLEND_ADD;
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * translateBlend --
 *
 *   Translate blend factor from svga3d to gallium representation.
 *
 * ----------------------------------------------------------------------
 */
static uint
translateBlend(Device *pDevice,
               D3D10_DDI_BLEND blend)
{
   if (!pDevice->max_dual_source_render_targets) {
      switch (blend) {
      case D3D10_DDI_BLEND_SRC1_COLOR:
      case D3D10_DDI_BLEND_SRC1_ALPHA:
         LOG_UNSUPPORTED(TRUE);
         return D3D10_DDI_BLEND_ZERO;
      case D3D10_DDI_BLEND_INV_SRC1_COLOR:
      case D3D10_DDI_BLEND_INV_SRC1_ALPHA:
         LOG_UNSUPPORTED(TRUE);
         return D3D10_DDI_BLEND_ONE;
      default:
         break;
      }
   }

   switch (blend) {
   case D3D10_DDI_BLEND_ZERO:
      return PIPE_BLENDFACTOR_ZERO;
   case D3D10_DDI_BLEND_ONE:
      return PIPE_BLENDFACTOR_ONE;
   case D3D10_DDI_BLEND_SRC_COLOR:
      return PIPE_BLENDFACTOR_SRC_COLOR;
   case D3D10_DDI_BLEND_INV_SRC_COLOR:
      return PIPE_BLENDFACTOR_INV_SRC_COLOR;
   case D3D10_DDI_BLEND_SRC_ALPHA:
      return PIPE_BLENDFACTOR_SRC_ALPHA;
   case D3D10_DDI_BLEND_INV_SRC_ALPHA:
      return PIPE_BLENDFACTOR_INV_SRC_ALPHA;
   case D3D10_DDI_BLEND_DEST_ALPHA:
      return PIPE_BLENDFACTOR_DST_ALPHA;
   case D3D10_DDI_BLEND_INV_DEST_ALPHA:
      return PIPE_BLENDFACTOR_INV_DST_ALPHA;
   case D3D10_DDI_BLEND_DEST_COLOR:
      return PIPE_BLENDFACTOR_DST_COLOR;
   case D3D10_DDI_BLEND_INV_DEST_COLOR:
      return PIPE_BLENDFACTOR_INV_DST_COLOR;
   case D3D10_DDI_BLEND_SRC_ALPHASAT:
      return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE;
   case D3D10_DDI_BLEND_BLEND_FACTOR:
      return PIPE_BLENDFACTOR_CONST_COLOR;
   case D3D10_DDI_BLEND_INVBLEND_FACTOR:
      return PIPE_BLENDFACTOR_INV_CONST_COLOR;
   case D3D10_DDI_BLEND_SRC1_COLOR:
      return PIPE_BLENDFACTOR_SRC1_COLOR;
   case D3D10_DDI_BLEND_INV_SRC1_COLOR:
      return PIPE_BLENDFACTOR_INV_SRC1_COLOR;
   case D3D10_DDI_BLEND_SRC1_ALPHA:
      return PIPE_BLENDFACTOR_SRC1_ALPHA;
   case D3D10_DDI_BLEND_INV_SRC1_ALPHA:
      return PIPE_BLENDFACTOR_INV_SRC1_ALPHA;
   default:
      assert(0);
      return PIPE_BLENDFACTOR_ONE;
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * CreateBlendState --
 *
 *    The CreateBlendState function creates a blend state.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
CreateBlendState(D3D10DDI_HDEVICE hDevice,                     // IN
                 __in const D3D10_DDI_BLEND_DESC *pBlendDesc,  // IN
                 D3D10DDI_HBLENDSTATE hBlendState,             // IN
                 D3D10DDI_HRTBLENDSTATE hRTBlendState)         // IN
{
   unsigned i;

   LOG_ENTRYPOINT();

   Device *pDevice = CastDevice(hDevice);
   struct pipe_context *pipe = pDevice->pipe;
   BlendState *pBlendState = CastBlendState(hBlendState);

   struct pipe_blend_state state;
   memset(&state, 0, sizeof state);

   for (i = 0; i < MIN2(PIPE_MAX_COLOR_BUFS, D3D10_DDI_SIMULTANEOUS_RENDER_TARGET_COUNT); ++i) {
      state.rt[i].blend_enable = pBlendDesc->BlendEnable[i];
      state.rt[i].colormask = pBlendDesc->RenderTargetWriteMask[i];

      if (pBlendDesc->BlendEnable[0] != pBlendDesc->BlendEnable[i] ||
          pBlendDesc->RenderTargetWriteMask[0] != pBlendDesc->RenderTargetWriteMask[i]) {
         state.independent_blend_enable = 1;
      }
   }

   state.rt[0].rgb_func = translateBlendOp(pBlendDesc->BlendOp);
   if (pBlendDesc->BlendOp == D3D10_DDI_BLEND_OP_MIN ||
       pBlendDesc->BlendOp == D3D10_DDI_BLEND_OP_MAX) {
      state.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
      state.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
   } else {
      state.rt[0].rgb_src_factor = translateBlend(pDevice, pBlendDesc->SrcBlend);
      state.rt[0].rgb_dst_factor = translateBlend(pDevice, pBlendDesc->DestBlend);
   }

   state.rt[0].alpha_func = translateBlendOp(pBlendDesc->BlendOpAlpha);
   if (pBlendDesc->BlendOpAlpha == D3D10_DDI_BLEND_OP_MIN ||
       pBlendDesc->BlendOpAlpha == D3D10_DDI_BLEND_OP_MAX) {
      state.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
      state.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
   } else {
      state.rt[0].alpha_src_factor = translateBlend(pDevice, pBlendDesc->SrcBlendAlpha);
      state.rt[0].alpha_dst_factor = translateBlend(pDevice, pBlendDesc->DestBlendAlpha);
   }

   /*
    * Propagate to all the other rendertargets
    */
   for (i = 1; i < MIN2(PIPE_MAX_COLOR_BUFS, D3D10_DDI_SIMULTANEOUS_RENDER_TARGET_COUNT); ++i) {
      state.rt[i].rgb_func = state.rt[0].rgb_func;
      state.rt[i].rgb_src_factor = state.rt[0].rgb_src_factor;
      state.rt[i].rgb_dst_factor = state.rt[0].rgb_dst_factor;
      state.rt[i].alpha_func = state.rt[0].alpha_func;
      state.rt[i].alpha_src_factor = state.rt[0].alpha_src_factor;
      state.rt[i].alpha_dst_factor = state.rt[0].alpha_dst_factor;
   }

   state.alpha_to_coverage = pBlendDesc->AlphaToCoverageEnable;

   pBlendState->handle = pipe->create_blend_state(pipe, &state);
}


/*
 * ----------------------------------------------------------------------
 *
 * CreateBlendState1 --
 *
 *    The CreateBlendState function creates a blend state.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
CreateBlendState1(D3D10DDI_HDEVICE hDevice,                     // IN
                  __in const D3D10_1_DDI_BLEND_DESC *pBlendDesc,  // IN
                  D3D10DDI_HBLENDSTATE hBlendState,             // IN
                  D3D10DDI_HRTBLENDSTATE hRTBlendState)         // IN
{
   unsigned i;

   LOG_ENTRYPOINT();

   Device *pDevice = CastDevice(hDevice);
   struct pipe_context *pipe = pDevice->pipe;
   BlendState *pBlendState = CastBlendState(hBlendState);

   struct pipe_blend_state state;
   memset(&state, 0, sizeof state);

   state.alpha_to_coverage = pBlendDesc->AlphaToCoverageEnable;
   state.independent_blend_enable = pBlendDesc->IndependentBlendEnable;

   for (i = 0; i < MIN2(PIPE_MAX_COLOR_BUFS, D3D10_DDI_SIMULTANEOUS_RENDER_TARGET_COUNT); ++i) {
      state.rt[i].blend_enable = pBlendDesc->RenderTarget[i].BlendEnable;
      state.rt[i].colormask = pBlendDesc->RenderTarget[i].RenderTargetWriteMask;

      state.rt[i].rgb_func = translateBlendOp(pBlendDesc->RenderTarget[i].BlendOp);
      if (pBlendDesc->RenderTarget[i].BlendOp == D3D10_DDI_BLEND_OP_MIN ||
          pBlendDesc->RenderTarget[i].BlendOp == D3D10_DDI_BLEND_OP_MAX) {
         state.rt[i].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
         state.rt[i].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
      } else {
         state.rt[i].rgb_src_factor = translateBlend(pDevice, pBlendDesc->RenderTarget[i].SrcBlend);
         state.rt[i].rgb_dst_factor = translateBlend(pDevice, pBlendDesc->RenderTarget[i].DestBlend);
      }

      state.rt[i].alpha_func = translateBlendOp(pBlendDesc->RenderTarget[i].BlendOpAlpha);
      if (pBlendDesc->RenderTarget[i].BlendOpAlpha == D3D10_DDI_BLEND_OP_MIN ||
          pBlendDesc->RenderTarget[i].BlendOpAlpha == D3D10_DDI_BLEND_OP_MAX) {
         state.rt[i].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
         state.rt[i].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
      } else {
         state.rt[i].alpha_src_factor = translateBlend(pDevice, pBlendDesc->RenderTarget[i].SrcBlendAlpha);
         state.rt[i].alpha_dst_factor = translateBlend(pDevice, pBlendDesc->RenderTarget[i].DestBlendAlpha);
      }
   }

   pBlendState->handle = pipe->create_blend_state(pipe, &state);
}


/*
 * ----------------------------------------------------------------------
 *
 * DestroyBlendState --
 *
 *    The DestroyBlendState function destroys the specified blend
 *    state object. The blend state object can be destoyed only if
 *    it is not currently bound to a display device.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
DestroyBlendState(D3D10DDI_HDEVICE hDevice,           // IN
                  D3D10DDI_HBLENDSTATE hBlendState)   // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   BlendState *pBlendState = CastBlendState(hBlendState);

   pipe->delete_blend_state(pipe, pBlendState->handle);
}


/*
 * ----------------------------------------------------------------------
 *
 * SetBlendState --
 *
 *    The SetBlendState function sets a blend state.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
SetBlendState(D3D10DDI_HDEVICE hDevice,      // IN
              D3D10DDI_HBLENDSTATE hState,   // IN
              const FLOAT pBlendFactor[4],   // IN
              UINT SampleMask)               // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   void *state = CastPipeBlendState(hState);

   pipe->bind_blend_state(pipe, state);

   struct pipe_blend_color color;
   color.color[0] = pBlendFactor[0];
   color.color[1] = pBlendFactor[1];
   color.color[2] = pBlendFactor[2];
   color.color[3] = pBlendFactor[3];

   pipe->set_blend_color(pipe, &color);

   pipe->set_sample_mask(pipe, SampleMask);
}


/*
 * ----------------------------------------------------------------------
 *
 * SetRenderTargets --
 *
 *    Set the rendertargets.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
SetRenderTargets(D3D10DDI_HDEVICE hDevice,                              // IN
                 __in_ecount (NumViews)
                  const D3D10DDI_HRENDERTARGETVIEW *phRenderTargetView, // IN
                 UINT RTargets,                                         // IN
                 UINT ClearTargets,                                     // IN
                 D3D10DDI_HDEPTHSTENCILVIEW hDepthStencilView)          // IN
{
   LOG_ENTRYPOINT();

   Device *pDevice = CastDevice(hDevice);

   struct pipe_context *pipe = pDevice->pipe;

   pDevice->fb.nr_cbufs = 0;
   for (unsigned i = 0; i < RTargets; ++i) {
      pipe_surface_reference(&pDevice->fb.cbufs[i],
                             CastPipeRenderTargetView(phRenderTargetView[i]));
      if (pDevice->fb.cbufs[i]) {
         pDevice->fb.nr_cbufs = i + 1;
      }
   }

   for (unsigned i = RTargets; i < PIPE_MAX_COLOR_BUFS; ++i) {
      pipe_surface_reference(&pDevice->fb.cbufs[i], NULL);
   }

   pipe_surface_reference(&pDevice->fb.zsbuf,
                          CastPipeDepthStencilView(hDepthStencilView));

   /*
    * Calculate the width/height fields for this framebuffer.  D3D10
    * actually specifies that they be identical for all bound views.
    */
   unsigned width, height;
   util_framebuffer_min_size(&pDevice->fb, &width, &height);
   pDevice->fb.width = width;
   pDevice->fb.height = height;

   pipe->set_framebuffer_state(pipe, &pDevice->fb);
}


/*
 * ----------------------------------------------------------------------
 *
 * CalcPrivateDepthStencilStateSize --
 *
 *    The CalcPrivateDepthStencilStateSize 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) for a depth stencil state.
 *
 * ----------------------------------------------------------------------
 */

SIZE_T APIENTRY
CalcPrivateDepthStencilStateSize(
   D3D10DDI_HDEVICE hDevice,                                   // IN
   __in const D3D10_DDI_DEPTH_STENCIL_DESC *pDepthStencilDesc) // IN
{
   return sizeof(DepthStencilState);
}


/*
 * ----------------------------------------------------------------------
 *
 * translateComparison --
 *
 *   Translate comparison function from DX10 to gallium representation.
 *
 * ----------------------------------------------------------------------
 */
static uint
translateComparison(D3D10_DDI_COMPARISON_FUNC Func)
{
   switch (Func) {
   case D3D10_DDI_COMPARISON_NEVER:
      return PIPE_FUNC_NEVER;
   case D3D10_DDI_COMPARISON_LESS:
      return PIPE_FUNC_LESS;
   case D3D10_DDI_COMPARISON_EQUAL:
      return PIPE_FUNC_EQUAL;
   case D3D10_DDI_COMPARISON_LESS_EQUAL:
      return PIPE_FUNC_LEQUAL;
   case D3D10_DDI_COMPARISON_GREATER:
      return PIPE_FUNC_GREATER;
   case D3D10_DDI_COMPARISON_NOT_EQUAL:
      return PIPE_FUNC_NOTEQUAL;
   case D3D10_DDI_COMPARISON_GREATER_EQUAL:
      return PIPE_FUNC_GEQUAL;
   case D3D10_DDI_COMPARISON_ALWAYS:
      return PIPE_FUNC_ALWAYS;
   default:
      assert(0);
      return PIPE_FUNC_ALWAYS;
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * translateStencilOp --
 *
 *   Translate stencil op from DX10 to gallium representation.
 *
 * ----------------------------------------------------------------------
 */
static uint
translateStencilOp(D3D10_DDI_STENCIL_OP StencilOp)
{
   switch (StencilOp) {
   case D3D10_DDI_STENCIL_OP_KEEP:
      return PIPE_STENCIL_OP_KEEP;
   case D3D10_DDI_STENCIL_OP_ZERO:
      return PIPE_STENCIL_OP_ZERO;
   case D3D10_DDI_STENCIL_OP_REPLACE:
      return PIPE_STENCIL_OP_REPLACE;
   case D3D10_DDI_STENCIL_OP_INCR_SAT:
      return PIPE_STENCIL_OP_INCR;
   case D3D10_DDI_STENCIL_OP_DECR_SAT:
      return PIPE_STENCIL_OP_DECR;
   case D3D10_DDI_STENCIL_OP_INVERT:
      return PIPE_STENCIL_OP_INVERT;
   case D3D10_DDI_STENCIL_OP_INCR:
      return PIPE_STENCIL_OP_INCR_WRAP;
   case D3D10_DDI_STENCIL_OP_DECR:
      return PIPE_STENCIL_OP_DECR_WRAP;
   default:
      assert(0);
      return PIPE_STENCIL_OP_KEEP;
   }
}


/*
 * ----------------------------------------------------------------------
 *
 * CreateDepthStencilState --
 *
 *    The CreateDepthStencilState function creates a depth stencil state.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
CreateDepthStencilState(
   D3D10DDI_HDEVICE hDevice,                                   // IN
   __in const D3D10_DDI_DEPTH_STENCIL_DESC *pDepthStencilDesc, // IN
   D3D10DDI_HDEPTHSTENCILSTATE hDepthStencilState,             // IN
   D3D10DDI_HRTDEPTHSTENCILSTATE hRTDepthStencilState)         // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   DepthStencilState *pDepthStencilState = CastDepthStencilState(hDepthStencilState);

   struct pipe_depth_stencil_alpha_state state;
   memset(&state, 0, sizeof state);

   /* Depth. */
   state.depth_enabled = (pDepthStencilDesc->DepthEnable ? 1 : 0);
   state.depth_writemask = (pDepthStencilDesc->DepthWriteMask ? 1 : 0);
   state.depth_func = translateComparison(pDepthStencilDesc->DepthFunc);

   /* Stencil. */
   if (pDepthStencilDesc->StencilEnable) {
      struct pipe_stencil_state *face0 = &state.stencil[0];
      struct pipe_stencil_state *face1 = &state.stencil[1];

      face0->enabled   = 1;
      face0->func      = translateComparison(pDepthStencilDesc->FrontFace.StencilFunc);
      face0->fail_op   = translateStencilOp(pDepthStencilDesc->FrontFace.StencilFailOp);
      face0->zpass_op  = translateStencilOp(pDepthStencilDesc->FrontFace.StencilPassOp);
      face0->zfail_op  = translateStencilOp(pDepthStencilDesc->FrontFace.StencilDepthFailOp);
      face0->valuemask = pDepthStencilDesc->StencilReadMask;
      face0->writemask = pDepthStencilDesc->StencilWriteMask;

      face1->enabled   = 1;
      face1->func      = translateComparison(pDepthStencilDesc->BackFace.StencilFunc);
      face1->fail_op   = translateStencilOp(pDepthStencilDesc->BackFace.StencilFailOp);
      face1->zpass_op  = translateStencilOp(pDepthStencilDesc->BackFace.StencilPassOp);
      face1->zfail_op  = translateStencilOp(pDepthStencilDesc->BackFace.StencilDepthFailOp);
      face1->valuemask = pDepthStencilDesc->StencilReadMask;
      face1->writemask = pDepthStencilDesc->StencilWriteMask;
#ifdef DEBUG
      if (!pDepthStencilDesc->FrontEnable) {
         ASSERT(face0->func == PIPE_FUNC_ALWAYS);
         ASSERT(face0->fail_op == PIPE_STENCIL_OP_KEEP);
         ASSERT(face0->zpass_op == PIPE_STENCIL_OP_KEEP);
         ASSERT(face0->zfail_op == PIPE_STENCIL_OP_KEEP);
      }

      if (!pDepthStencilDesc->BackEnable) {
         ASSERT(face1->func == PIPE_FUNC_ALWAYS);
         ASSERT(face1->fail_op == PIPE_STENCIL_OP_KEEP);
         ASSERT(face1->zpass_op == PIPE_STENCIL_OP_KEEP);
         ASSERT(face1->zfail_op == PIPE_STENCIL_OP_KEEP);
      }
#endif
   }

   pDepthStencilState->handle =
      pipe->create_depth_stencil_alpha_state(pipe, &state);
}


/*
 * ----------------------------------------------------------------------
 *
 * DestroyDepthStencilState --
 *
 *    The CreateDepthStencilState function creates a depth stencil state.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
DestroyDepthStencilState(D3D10DDI_HDEVICE hDevice,                         // IN
                         D3D10DDI_HDEPTHSTENCILSTATE hDepthStencilState)   // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   DepthStencilState *pDepthStencilState = CastDepthStencilState(hDepthStencilState);

   pipe->delete_depth_stencil_alpha_state(pipe, pDepthStencilState->handle);
}


/*
 * ----------------------------------------------------------------------
 *
 * SetDepthStencilState --
 *
 *    The SetDepthStencilState function sets a depth-stencil state.
 *
 * ----------------------------------------------------------------------
 */

void APIENTRY
SetDepthStencilState(D3D10DDI_HDEVICE hDevice,           // IN
                     D3D10DDI_HDEPTHSTENCILSTATE hState, // IN
                     UINT StencilRef)                    // IN
{
   LOG_ENTRYPOINT();

   struct pipe_context *pipe = CastPipeContext(hDevice);
   void *state = CastPipeDepthStencilState(hState);
   struct pipe_stencil_ref psr;

   psr.ref_value[0] = StencilRef;
   psr.ref_value[1] = StencilRef;

   pipe->bind_depth_stencil_alpha_state(pipe, state);
   pipe->set_stencil_ref(pipe, psr);
}