<Project>
    <PropertyGroup>
        <!-- Instucts Visual Studio to always start MSBuild when building. -->
        <DisableFastUpToDateCheck>true</DisableFastUpToDateCheck>
        
        <ShaderCPath Condition=" $(ShaderCPath) == '' ">$(MSBuildThisFileDirectory)tools\shaderc.exe</ShaderCPath>
        <ShaderIncludeDir Condition=" $(ShaderIncludeDir) == '' ">$(MSBuildThisFileDirectory)include</ShaderIncludeDir>
        <VertexShaderIncludePattern Condition=" $(VertexShaderIncludePattern) == '' ">vs_*.sc</VertexShaderIncludePattern>
        <FragmentShaderIncludePattern Condition=" $(FragmentShaderIncludePattern) == '' ">fs_*.sc</FragmentShaderIncludePattern>
        <ComputeShaderIncludePattern Condition=" $(ComputeShaderIncludePattern) == '' ">cs_*.sc</ComputeShaderIncludePattern>
        <ShaderOutputDir Condition=" $(ShaderOutputDir) == '' ">bin\</ShaderOutputDir>
    </PropertyGroup>

    <ItemGroup>
        <VertexShaders Include="$(VertexShaderIncludePattern)" />
        <FragmentShaders Include="$(FragmentShaderIncludePattern)" />
        <ComputeShaders Include="$(ComputeShaderIncludePattern)" />
    </ItemGroup>
    
    <!-- Build process hooks. -->
    <PropertyGroup>
        <CleanDependsOn>CleanShaders;$(CoreCompileDependsOn)</CleanDependsOn>
        <CoreCompileDependsOn>$(CoreCompileDependsOn);CompileShaders</CoreCompileDependsOn>
    </PropertyGroup>
    
    <Target Name="CleanShaders" BeforeTargets="CoreClean">    
        <RemoveDir Condition=" Exists('$(IntermediateOutputPath)$(ShaderOutputDir)') "
                   Directories="$(IntermediateOutputPath)$(ShaderOutputDir)" />
    
        <RemoveDir Condition=" Exists('$(TargetDir)$(ShaderOutputDir)') "
                   Directories="$(TargetDir)$(ShaderOutputDir)" />
    </Target>
    
    <Target Name="CompileShaders"
            BeforeTargets="AfterBuild"
            AfterTargets="CopyFilesToOutputDirectory"
            DependsOnTargets="EnsureShaderIntermediateOutputDirectory;CompileVertexShaders;CompileFragmentShaders;CompileComputeShaders;CopyShaderBinariesToOutputDirectory" />
    
    <Target Name="EnsureShaderIntermediateOutputDirectory">
        <MakeDir Directories="$(IntermediateOutputPath)$(ShaderOutputDir)dx11\" />
        <MakeDir Directories="$(IntermediateOutputPath)$(ShaderOutputDir)glsl\" />
    </Target>
    
    <Target Name="CompileVertexShaders" Inputs="@(VertexShaders)" Outputs="$(IntermediateOutputPath)$(ShaderOutputDir)dx11\%(VertexShaders.Filename).bin;$(IntermediateOutputPath)$(ShaderOutputDir)glsl\%(VertexShaders.Filename).bin">
        <Exec Command="$(ShaderCPath) --platform windows --type vertex -p vs_4_0 -O 3 -f &quot;@(VertexShaders)&quot; -o &quot;$(IntermediateOutputPath)$(ShaderOutputDir)dx11\%(VertexShaders.Filename).bin&quot; -i &quot;$(ShaderIncludeDir)&quot;" />
        <Exec Command="$(ShaderCPath) --platform linux --type vertex -p 120 -f &quot;@(VertexShaders)&quot; -o &quot;$(IntermediateOutputPath)$(ShaderOutputDir)glsl\%(VertexShaders.Filename).bin&quot; -i &quot;$(ShaderIncludeDir)&quot;" />    
    </Target>
    
    <Target Name="CompileFragmentShaders" Inputs="@(FragmentShaders)" Outputs="$(IntermediateOutputPath)$(ShaderOutputDir)dx11\%(FragmentShaders.Filename).bin;$(IntermediateOutputPath)$(ShaderOutputDir)glsl\%(FragmentShaders.Filename).bin">        
        <Exec Command="$(ShaderCPath) --platform windows --type fragment -p ps_4_0 -O 3 -f &quot;@(FragmentShaders)&quot; -o &quot;$(IntermediateOutputPath)$(ShaderOutputDir)dx11\%(FragmentShaders.Filename).bin&quot; -i &quot;$(ShaderIncludeDir)&quot;" />
        <Exec Command="$(ShaderCPath) --platform linux --type fragment -p 120 -f &quot;@(FragmentShaders)&quot; -o &quot;$(IntermediateOutputPath)$(ShaderOutputDir)glsl\%(FragmentShaders.Filename).bin&quot; -i &quot;$(ShaderIncludeDir)&quot;" />    
    </Target>
        
    <Target Name="CompileComputeShaders" Inputs="@(ComputeShaders)" Outputs="$(IntermediateOutputPath)$(ShaderOutputDir)dx11\%(ComputeShaders.Filename).bin;$(IntermediateOutputPath)$(ShaderOutputDir)glsl\%(ComputeShaders.Filename).bin">            
        <Exec Command="$(ShaderCPath) --platform windows --type compute -p cs_5_0 -O 3 -f &quot;@(ComputeShaders)&quot; -o &quot;$(IntermediateOutputPath)$(ShaderOutputDir)dx11\%(ComputeShaders.Filename).bin&quot; -i &quot;$(ShaderIncludeDir)&quot;" />
        <Exec Command="$(ShaderCPath) --platform linux --type compute -p 430 -f &quot;@(ComputeShaders)&quot; -o &quot;$(IntermediateOutputPath)$(ShaderOutputDir)glsl\%(ComputeShaders.Filename).bin&quot; -i &quot;$(ShaderIncludeDir)&quot;" />    
    </Target>
    
    <Target Name="CopyShaderBinariesToOutputDirectory">
        <ItemGroup>
            <ShaderBinaries Include="$(IntermediateOutputPath)$(ShaderOutputDir)**\*.bin" />
        </ItemGroup>

        <Copy SourceFiles="@(ShaderBinaries)"
              DestinationFolder="$(TargetDir)$(ShaderOutputDir)%(RecursiveDir)"
              SkipUnchangedFiles="true" />
    </Target>
</Project>