public static Task <string> ReadShaderSource(this AssetsDirectoryBase assetsDirectory, GraphicsContext graphicsContext, string hlslFileName, string translateFileName, string root = null)
{
var backendType = graphicsContext.BackendType;
if (backendType == GraphicsBackend.DirectX11 ||
backendType == GraphicsBackend.DirectX12)
{
return(assetsDirectory.ReadAsStringAsync($"{root}Shaders/HLSL/{hlslFileName}.fx"));
}
else if (backendType == GraphicsBackend.OpenGL)
{
return(assetsDirectory.ReadAsStringAsync($"{root}Shaders/GLSL/{translateFileName}.glsl"));
}
else if (backendType == GraphicsBackend.OpenGLES)
{
return(assetsDirectory.ReadAsStringAsync($"{root}Shaders/GLSL_ES/{translateFileName}.essl"));
}
else if (backendType == GraphicsBackend.Metal)
{
return(assetsDirectory.ReadAsStringAsync($"Shaders/MSL/{translateFileName}.msl"));
}
else
{
throw new InvalidOperationException($"Unsuported backend type: {backendType}");
}
}
public static Task <ShaderDescription> ReadAndCompileShader(this AssetsDirectoryBase assetsDirectory, GraphicsContext graphicsContext, string hlslFileName, string translateFileName, ShaderStages stage, string entryPoint)
{
return(ReadAndCompileShader(assetsDirectory, graphicsContext, hlslFileName, translateFileName, stage, entryPoint, CompilerParameters.Default));
}
public static async Task <ShaderDescription> ReadAndCompileShader(this AssetsDirectoryBase assetsDirectory, GraphicsContext graphicsContext, string hlslFileName, string translateFileName, ShaderStages stage, string entryPoint, CompilerParameters compileParameters)
{
GraphicsBackend backend = graphicsContext.BackendType;
string source;
byte[] bytecode = null;
switch (backend)
{
case GraphicsBackend.DirectX11:
case GraphicsBackend.DirectX12:
source = await assetsDirectory.ReadAsStringAsync($"Shaders/HLSL/{hlslFileName}.fx");
bytecode = graphicsContext.ShaderCompile(source, entryPoint, stage, compileParameters).ByteCode;
break;
case GraphicsBackend.OpenGL:
source = await assetsDirectory.ReadAsStringAsync($"Shaders/GLSL/{translateFileName}.glsl");
bytecode = graphicsContext.ShaderCompile(source, entryPoint, stage, compileParameters).ByteCode;
break;
case GraphicsBackend.OpenGLES:
source = await assetsDirectory.ReadAsStringAsync($"Shaders/ESSL/{translateFileName}.essl");
bytecode = graphicsContext.ShaderCompile(source, entryPoint, stage, compileParameters).ByteCode;
break;
case GraphicsBackend.Metal:
source = await assetsDirectory.ReadAsStringAsync($"Shaders/MSL/{translateFileName}.msl");
bytecode = graphicsContext.ShaderCompile(source, entryPoint, stage, compileParameters).ByteCode;
break;
case GraphicsBackend.Vulkan:
var stream = assetsDirectory.Open($"Shaders/VK/{translateFileName}.spirv");
using (System.IO.BinaryReader br = new System.IO.BinaryReader(stream))
{
bytecode = br.ReadBytes((int)stream.Length);
}
break;
default:
throw new Exception($"Backend not found {backend}");
}
ShaderDescription description = new ShaderDescription(stage, entryPoint, bytecode);
return(description);
}
