#include "d3d11_buffer.h"
#include "d3d11_context.h"
#include "d3d11_device.h"

#include "../dxvk/dxvk_data.h"

namespace dxvk {
  
  D3D11Buffer::D3D11Buffer(
          D3D11Device*                pDevice,
    const D3D11_BUFFER_DESC*          pDesc)
  : m_device    (pDevice),
    m_desc      (*pDesc),
    m_buffer    (CreateBuffer(pDesc)) {
    
  }
  
  
  D3D11Buffer::~D3D11Buffer() {
    
  }
  
  
  HRESULT STDMETHODCALLTYPE D3D11Buffer::QueryInterface(REFIID riid, void** ppvObject) {
    COM_QUERY_IFACE(riid, ppvObject, IUnknown);
    COM_QUERY_IFACE(riid, ppvObject, ID3D11DeviceChild);
    COM_QUERY_IFACE(riid, ppvObject, ID3D11Resource);
    COM_QUERY_IFACE(riid, ppvObject, ID3D11Buffer);
    
    Logger::warn("D3D11Buffer::QueryInterface: Unknown interface query");
    return E_NOINTERFACE;
  }
  
  
  void STDMETHODCALLTYPE D3D11Buffer::GetDevice(ID3D11Device** ppDevice) {
    *ppDevice = m_device.ref();
  }
  
  
  UINT STDMETHODCALLTYPE D3D11Buffer::GetEvictionPriority() {
    Logger::warn("D3D11Buffer::GetEvictionPriority: Stub");
    return DXGI_RESOURCE_PRIORITY_NORMAL;
  }
  
  
  void STDMETHODCALLTYPE D3D11Buffer::SetEvictionPriority(UINT EvictionPriority) {
    Logger::warn("D3D11Buffer::SetEvictionPriority: Stub");
  }
  
  
  void STDMETHODCALLTYPE D3D11Buffer::GetType(D3D11_RESOURCE_DIMENSION* pResourceDimension) {
    *pResourceDimension = D3D11_RESOURCE_DIMENSION_BUFFER;
  }
  
  
  void STDMETHODCALLTYPE D3D11Buffer::GetDesc(D3D11_BUFFER_DESC* pDesc) {
    *pDesc = m_desc;
  }
  
  
  Rc<DxvkBuffer> D3D11Buffer::CreateBuffer(
    const D3D11_BUFFER_DESC* pDesc) const {
    DxvkBufferCreateInfo  info;
    info.size   = pDesc->ByteWidth;
    info.usage  = VK_BUFFER_USAGE_TRANSFER_SRC_BIT
                | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
    info.stages = VK_PIPELINE_STAGE_TRANSFER_BIT;
    info.access = VK_ACCESS_TRANSFER_READ_BIT
                | VK_ACCESS_TRANSFER_WRITE_BIT;
    
    if (pDesc->BindFlags & D3D11_BIND_VERTEX_BUFFER) {
      info.usage  |= VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
      info.stages |= VK_PIPELINE_STAGE_VERTEX_INPUT_BIT;
      info.access |= VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT;
    }
    
    if (pDesc->BindFlags & D3D11_BIND_INDEX_BUFFER) {
      info.usage  |= VK_BUFFER_USAGE_INDEX_BUFFER_BIT;
      info.stages |= VK_PIPELINE_STAGE_VERTEX_INPUT_BIT;
      info.access |= VK_ACCESS_INDEX_READ_BIT;
    }
    
    if (pDesc->BindFlags & D3D11_BIND_CONSTANT_BUFFER) {
      info.usage  |= VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT;
      info.stages |= m_device->GetEnabledShaderStages();
      info.access |= VK_ACCESS_UNIFORM_READ_BIT;
    }
    
    if (pDesc->BindFlags & D3D11_BIND_SHADER_RESOURCE) {
      info.usage  |= VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT;
      info.stages |= m_device->GetEnabledShaderStages();
      info.access |= VK_ACCESS_SHADER_READ_BIT;
    }
    
    if (pDesc->BindFlags & D3D11_BIND_STREAM_OUTPUT)
      throw DxvkError("D3D11Device::CreateBuffer: D3D11_BIND_STREAM_OUTPUT not supported");
    
    if (pDesc->BindFlags & D3D11_BIND_UNORDERED_ACCESS) {
      info.usage  |= VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT;
      info.stages |= VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT
                  |  VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT;
      info.access |= VK_ACCESS_SHADER_READ_BIT
                  |  VK_ACCESS_SHADER_WRITE_BIT;
    }
    
    if (pDesc->CPUAccessFlags & D3D11_CPU_ACCESS_WRITE) {
      info.stages |= VK_PIPELINE_STAGE_HOST_BIT;
      info.access |= VK_ACCESS_HOST_WRITE_BIT;
    }
    
    if (pDesc->CPUAccessFlags & D3D11_CPU_ACCESS_READ) {
      info.stages |= VK_PIPELINE_STAGE_HOST_BIT;
      info.access |= VK_ACCESS_HOST_READ_BIT;
    }
    
    if (pDesc->MiscFlags & D3D11_RESOURCE_MISC_DRAWINDIRECT_ARGS) {
      info.usage  |= VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT;
      info.stages |= VK_PIPELINE_STAGE_DRAW_INDIRECT_BIT;
      info.access |= VK_ACCESS_INDIRECT_COMMAND_READ_BIT;
    }
    
    return m_device->GetDXVKDevice()->createBuffer(
      info, GetMemoryFlagsForUsage(pDesc->Usage));
  }
  
}