text: /******************************************************************************
   * The MIT License (MIT)
   *
   * Copyright (c) 2015-2019 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 "d3d11_test.h"
  
  struct Discard_View : D3D11GraphicsTest
  {
    static constexpr const char *Description = "Test that discards an RTV";
  
    std::string pixel = R"EOSHADER(
  
  cbuffer consts : register(b0)
  {
  	float4 col;
  };
  
  float4 main() : SV_Target0
  {
  	return col;
  }
  
  )EOSHADER";
  
    int main(int argc, char **argv)
    {
      d3d11_1 = true;
  
      // initialise, create window, create device, etc
      if(!Init(argc, argv))
        return 3;
  
      ID3DBlobPtr vsblob = Compile(D3DFullscreenQuadVertex, "main", "vs_5_0");
      ID3DBlobPtr psblob = Compile(pixel, "main", "ps_5_0");
  
      ID3D11VertexShaderPtr vs = CreateVS(vsblob);
      ID3D11PixelShaderPtr ps = CreatePS(psblob);
  
      ID3D11Texture2DPtr tex_rt =
          MakeTexture(DXGI_FORMAT_R8G8B8A8_UNORM, screenWidth, screenHeight).RTV();
      ID3D11RenderTargetViewPtr rtv = MakeRTV(tex_rt);
  
      Vec4f col;
      ID3D11BufferPtr cb = MakeBuffer().Constant().Size(sizeof(Vec4f));
  
      D3D11_VIEWPORT view[10];
      for(int i = 0; i < 10; i++)
      {
        view[i].MinDepth = 0.0f;
        view[i].MaxDepth = 1.0f;
        view[i].TopLeftX = (float)i * 50.0f;
        view[i].TopLeftY = 0.0f;
        view[i].Width = 50.0f;
        view[i].Height = 250.0f;
      }
  
      D3D11_VIEWPORT fullview;
      {
        fullview.MinDepth = 0.0f;
        fullview.MaxDepth = 1.0f;
        fullview.TopLeftX = 0.0f;
        fullview.TopLeftY = 0.0f;
        fullview.Width = (float)screenWidth;
        fullview.Height = (float)screenHeight;
      }
  
      while(Running())
      {
        ctx1->DiscardView(bbRTV);
  
        ctx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
  
        ctx->VSSetShader(vs, NULL, 0);
        ctx->PSSetShader(ps, NULL, 0);
  
        ctx->PSSetConstantBuffers(0, 1, &cb.GetInterfacePtr());
  
        {
          ctx->RSSetViewports(1, &fullview);
  
          rtv = MakeRTV(tex_rt);
  
          ctx->OMSetRenderTargets(1, &rtv.GetInterfacePtr(), NULL);
  
          col = Vec4f(RANDF(0.0f, 1.0f), RANDF(0.0f, 1.0f), RANDF(0.0f, 1.0f), 1.0f);
          ctx->UpdateSubresource(cb, 0, NULL, &col, sizeof(col), sizeof(col));
  
          ctx->Draw(4, 0);
        }
  
        for(int i = 0; i < 10; i++)
        {
          ctx->RSSetViewports(1, view + i);
  
          rtv = MakeRTV(tex_rt);
  
          ctx->OMSetRenderTargets(1, &rtv.GetInterfacePtr(), NULL);
  
          col = Vec4f(RANDF(0.0f, 1.0f), RANDF(0.0f, 1.0f), RANDF(0.0f, 1.0f), 1.0f);
          ctx->UpdateSubresource(cb, 0, NULL, &col, sizeof(col), sizeof(col));
  
          ctx->Draw(4, 0);
        }
  
        ctx->CopyResource(bbTex, tex_rt);
  
        Present();
      }
  
      return 0;
    }
  };
  
  REGISTER_TEST(Discard_View);