kc3-lang/angle/src/libGLESv2/renderer/VertexDeclarationCache.cpp

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• Author : shannon.woods@transgaming.com
  Date : 2013-02-28 23:16:20
  Hash : bdf2d80f
  Message : Add precompiled header support for the libGLESv2 project. TRAC #22518 Signed-off-by: Geoff Lang Signed-off-by: Shannon Woods Author: Jamie Madill git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1938 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libGLESv2/renderer/VertexDeclarationCache.cpp

• #include "precompiled.h"
  //
  // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // VertexDeclarationCache.cpp: Implements a helper class to construct and cache vertex declarations.
  
  #include "libGLESv2/ProgramBinary.h"
  #include "libGLESv2/Context.h"
  #include "libGLESv2/renderer/VertexBuffer9.h"
  #include "libGLESv2/renderer/VertexDeclarationCache.h"
  
  namespace rx
  {
  
  VertexDeclarationCache::VertexDeclarationCache() : mMaxLru(0)
  {
      for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
      {
          mVertexDeclCache[i].vertexDeclaration = NULL;
          mVertexDeclCache[i].lruCount = 0;
      }
  
      for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
      {
          mAppliedVBs[i].serial = 0;
      }
  
      mLastSetVDecl = NULL;
      mInstancingEnabled = true;
  }
  
  VertexDeclarationCache::~VertexDeclarationCache()
  {
      for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
      {
          if (mVertexDeclCache[i].vertexDeclaration)
          {
              mVertexDeclCache[i].vertexDeclaration->Release();
          }
      }
  }
  
  GLenum VertexDeclarationCache::applyDeclaration(IDirect3DDevice9 *device, TranslatedAttribute attributes[], gl::ProgramBinary *programBinary, GLsizei instances, GLsizei *repeatDraw)
  {
      *repeatDraw = 1;
  
      int indexedAttribute = gl::MAX_VERTEX_ATTRIBS;
      int instancedAttribute = gl::MAX_VERTEX_ATTRIBS;
  
      if (instances > 0)
      {
          // Find an indexed attribute to be mapped to D3D stream 0
          for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
          {
              if (attributes[i].active)
              {
                  if (indexedAttribute == gl::MAX_VERTEX_ATTRIBS && attributes[i].divisor == 0)
                  {
                      indexedAttribute = i;
                  }
                  else if (instancedAttribute == gl::MAX_VERTEX_ATTRIBS && attributes[i].divisor != 0)
                  {
                      instancedAttribute = i;
                  }
                  if (indexedAttribute != gl::MAX_VERTEX_ATTRIBS && instancedAttribute != gl::MAX_VERTEX_ATTRIBS)
                      break;   // Found both an indexed and instanced attribute
              }
          }
  
          if (indexedAttribute == gl::MAX_VERTEX_ATTRIBS)
          {
              return GL_INVALID_OPERATION;
          }
      }
  
      D3DVERTEXELEMENT9 elements[gl::MAX_VERTEX_ATTRIBS + 1];
      D3DVERTEXELEMENT9 *element = &elements[0];
  
      for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
      {
          if (attributes[i].active)
          {
              // Directly binding the storage buffer is not supported for d3d9
              ASSERT(attributes[i].storage == NULL);
  
              int stream = i;
  
              if (instances > 0)
              {
                  // Due to a bug on ATI cards we can't enable instancing when none of the attributes are instanced.
                  if (instancedAttribute == gl::MAX_VERTEX_ATTRIBS)
                  {
                      *repeatDraw = instances;
                  }
                  else
                  {
                      if (i == indexedAttribute)
                      {
                          stream = 0;
                      }
                      else if (i == 0)
                      {
                          stream = indexedAttribute;
                      }
  
                      UINT frequency = 1;
                      
                      if (attributes[i].divisor == 0)
                      {
                          frequency = D3DSTREAMSOURCE_INDEXEDDATA | instances;
                      }
                      else
                      {
                          frequency = D3DSTREAMSOURCE_INSTANCEDATA | attributes[i].divisor;
                      }
                      
                      device->SetStreamSourceFreq(stream, frequency);
                      mInstancingEnabled = true;
                  }
              }
  
              VertexBuffer9 *vertexBuffer = VertexBuffer9::makeVertexBuffer9(attributes[i].vertexBuffer);
  
              if (mAppliedVBs[stream].serial != attributes[i].serial ||
                  mAppliedVBs[stream].stride != attributes[i].stride ||
                  mAppliedVBs[stream].offset != attributes[i].offset)
              {
                  device->SetStreamSource(stream, vertexBuffer->getBuffer(), attributes[i].offset, attributes[i].stride);
                  mAppliedVBs[stream].serial = attributes[i].serial;
                  mAppliedVBs[stream].stride = attributes[i].stride;
                  mAppliedVBs[stream].offset = attributes[i].offset;
              }
  
              element->Stream = stream;
              element->Offset = 0;
              element->Type = attributes[i].attribute->mArrayEnabled ? vertexBuffer->getDeclType(*attributes[i].attribute) : D3DDECLTYPE_FLOAT4;
              element->Method = D3DDECLMETHOD_DEFAULT;
              element->Usage = D3DDECLUSAGE_TEXCOORD;
              element->UsageIndex = programBinary->getSemanticIndex(i);
              element++;
          }
      }
  
      if (instances == 0 || instancedAttribute == gl::MAX_VERTEX_ATTRIBS)
      {
          if (mInstancingEnabled)
          {
              for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
              {
                  device->SetStreamSourceFreq(i, 1);
              }
  
              mInstancingEnabled = false;
          }
      }
  
      static const D3DVERTEXELEMENT9 end = D3DDECL_END();
      *(element++) = end;
  
      for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
      {
          VertexDeclCacheEntry *entry = &mVertexDeclCache[i];
          if (memcmp(entry->cachedElements, elements, (element - elements) * sizeof(D3DVERTEXELEMENT9)) == 0 && entry->vertexDeclaration)
          {
              entry->lruCount = ++mMaxLru;
              if(entry->vertexDeclaration != mLastSetVDecl)
              {
                  device->SetVertexDeclaration(entry->vertexDeclaration);
                  mLastSetVDecl = entry->vertexDeclaration;
              }
  
              return GL_NO_ERROR;
          }
      }
  
      VertexDeclCacheEntry *lastCache = mVertexDeclCache;
  
      for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
      {
          if (mVertexDeclCache[i].lruCount < lastCache->lruCount)
          {
              lastCache = &mVertexDeclCache[i];
          }
      }
  
      if (lastCache->vertexDeclaration != NULL)
      {
          lastCache->vertexDeclaration->Release();
          lastCache->vertexDeclaration = NULL;
          // mLastSetVDecl is set to the replacement, so we don't have to worry
          // about it.
      }
  
      memcpy(lastCache->cachedElements, elements, (element - elements) * sizeof(D3DVERTEXELEMENT9));
      device->CreateVertexDeclaration(elements, &lastCache->vertexDeclaration);
      device->SetVertexDeclaration(lastCache->vertexDeclaration);
      mLastSetVDecl = lastCache->vertexDeclaration;
      lastCache->lruCount = ++mMaxLru;
  
      return GL_NO_ERROR;
  }
  
  void VertexDeclarationCache::markStateDirty()
  {
      for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
      {
          mAppliedVBs[i].serial = 0;
      }
  
      mLastSetVDecl = NULL;
      mInstancingEnabled = true;   // Forces it to be disabled when not used
  }
  
  }