/******************************************************************************
 * The MIT License (MIT)
 *
 * Copyright (c) 2019-2020 Baldur Karlsson
 *
 * 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, sublicense, 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 above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS 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.
 ******************************************************************************/

#include "d3d12_test.h"

RD_TEST(D3D12_Execute_Indirect, D3D12GraphicsTest)
{
  static constexpr const char *Description =
      "Tests use of ExecuteIndirect() in different edge-case scenarios.";

  int main()
  {
    // initialise, create window, create device, etc
    if(!Init())
      return 3;

    ID3DBlobPtr vsblob = Compile(D3DDefaultVertex, "main", "vs_4_0");
    ID3DBlobPtr psblob = Compile(D3DDefaultPixel, "main", "ps_4_0");

    const DefaultA2V tri[3] = {
        {Vec3f(-0.5f, -0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 1.0f), Vec2f(0.0f, 0.0f)},
        {Vec3f(0.0f, 0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 1.0f), Vec2f(0.0f, 1.0f)},
        {Vec3f(0.5f, -0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 1.0f), Vec2f(1.0f, 0.0f)},
    };

    ID3D12ResourcePtr vb = MakeBuffer().Data(tri);

    ID3D12RootSignaturePtr sig = MakeSig({});

    ID3D12CommandSignaturePtr cmdsig = MakeCommandSig(NULL, {vbArg(0), drawArg()});

    struct
    {
      D3D12_VERTEX_BUFFER_VIEW vb;
      D3D12_DRAW_ARGUMENTS draw;
    } args;

    args.vb.BufferLocation = vb->GetGPUVirtualAddress();
    args.vb.SizeInBytes = sizeof(tri);
    args.vb.StrideInBytes = sizeof(DefaultA2V);
    args.draw.VertexCountPerInstance = 3;
    args.draw.InstanceCount = 1;
    args.draw.StartInstanceLocation = 0;
    args.draw.StartVertexLocation = 0;

    ID3D12ResourcePtr argBuf = MakeBuffer().Upload().Size(sizeof(args)).Data(&args);

    ID3D12PipelineStatePtr pso = MakePSO().RootSig(sig).InputLayout().VS(vsblob).PS(psblob);

    ResourceBarrier(vb, D3D12_RESOURCE_STATE_COMMON, D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER);

    while(Running())
    {
      ID3D12GraphicsCommandListPtr cmd = GetCommandBuffer();

      Reset(cmd);

      ID3D12ResourcePtr bb = StartUsingBackbuffer(cmd, D3D12_RESOURCE_STATE_RENDER_TARGET);

      D3D12_CPU_DESCRIPTOR_HANDLE rtv =
          MakeRTV(bb).Format(DXGI_FORMAT_R8G8B8A8_UNORM_SRGB).CreateCPU(0);

      ClearRenderTargetView(cmd, rtv, {1.0f, 0.0f, 0.0f, 1.0f});

      cmd->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);

      IASetVertexBuffer(cmd, vb, sizeof(DefaultA2V), 0);
      cmd->SetPipelineState(pso);
      cmd->SetGraphicsRootSignature(sig);

      RSSetViewport(cmd, {0.0f, 0.0f, (float)screenWidth, (float)screenHeight, 0.0f, 1.0f});
      RSSetScissorRect(cmd, {0, 0, screenWidth, screenHeight});

      OMSetRenderTargets(cmd, {rtv}, {});

      cmd->ExecuteIndirect(cmdsig, 1, argBuf, 0, NULL, 0);

      FinishUsingBackbuffer(cmd, D3D12_RESOURCE_STATE_RENDER_TARGET);

      cmd->Close();

      Submit({cmd});

      Present();
    }

    return 0;
  }
};

REGISTER_TEST();