Function RT_FetchVertexPipeData

qrenderdoc/Windows/BufferViewer.cpp:2055–2314

}

static void RT_FetchVertexPipeData(IReplayController *r, ICaptureContext &ctx,
                                   PopulateBufferData *data)
{
  const ActionDescription *action = ctx.CurAction();

  BoundVBuffer ib = ctx.CurPipelineState().GetIBuffer();

  rdcarray<BoundVBuffer> vbs = ctx.CurPipelineState().GetVBuffers();

  uint32_t numIndices = action ? action->numIndices : 0;

  bytebuf idata;
  if(ib.resourceId != ResourceId() && action && (action->flags & ActionFlags::Indexed))
  {
    uint64_t readBytes = numIndices * ib.byteStride;
    uint32_t offset = action->indexOffset * ib.byteStride;

    if(ib.byteSize > offset)
      readBytes = qMin(ib.byteSize - offset, readBytes);
    else
      readBytes = 0;

    if(readBytes > 0)
      idata = r->GetBufferData(ib.resourceId, ib.byteOffset + offset, readBytes);
  }

  if(data->inConfig.indices)
    data->inConfig.indices->deref();

  data->inConfig.indices = new BufferData();

  if(action && ib.byteStride != 0 && !idata.isEmpty())
    data->inConfig.indices->storage.resize(
        sizeof(uint32_t) *
        qMin(numIndices, (((uint32_t)idata.size() + ib.byteStride - 1) / ib.byteStride)));
  else if(action && (action->flags & ActionFlags::Indexed))
    data->inConfig.indices->storage.resize(sizeof(uint32_t));

  uint32_t *indices = (uint32_t *)data->inConfig.indices->data();

  uint32_t maxIndex = 0;
  if(action)
    maxIndex = qMax(1U, numIndices) - 1;

  if(action && !idata.isEmpty())
  {
    maxIndex = 0;
    if(ib.byteStride == 1)
    {
      uint8_t primRestart = data->inConfig.primRestart & 0xff;

      for(size_t i = 0; i < idata.size() && (uint32_t)i < numIndices; i++)
      {
        indices[i] = (uint32_t)idata[i];
        if(primRestart && indices[i] == primRestart)
          continue;

        maxIndex = qMax(maxIndex, indices[i]);