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https://github.com/alaingalvan/CrossShader

⚔️ A tool for cross compiling shaders. Convert between GLSL, HLSL, Metal Shader Language, or older versions of GLSL.
https://github.com/alaingalvan/CrossShader

apple-metal compiler directx glsl hlsl metal opengl transpiler vulkan webgl

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⚔️ A tool for cross compiling shaders. Convert between GLSL, HLSL, Metal Shader Language, or older versions of GLSL.

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  ⚔️ CrossShader






[![Npm Package][npm-img]][npm-url]

[![cmake-img]][cmake-url]

[![License][license-img]][license-url]

[![Travis Tests][travis-img]][travis-url]

[![Dependency Status][deps-img]][deps-url]






A cross compiler for shader languages. Convert between **SPIR-V**, **GLSL / GLSL ES**, **HLSL**, **Metal Shader Language**, or older versions of a given language. Cross Shader wraps [DirectX Shader Compiler](https://github.com/microsoft/DirectXShaderCompiler), [glslang](https://github.com/KhronosGroup/glslang), [Mozilla Naga](https://github.com/gfx-rs/naga) and [SPIRV-Cross](https://github.com/KhronosGroup/SPIRV-Cross/), exposing a simpler interface to transpile shaders.



## Installation



### Node.js Installation



```bash

npm i cross-shader -S

```



Using this module will require Node 8.x or above, or [a browser that supports WebAssembly](https://caniuse.com/#feat=wasm).



### C++ Installation



First add the repo as a submodule in your dependencies folder such as `external/`:



```bash

cd external

git submodule add https://github.com/alaingalvan/crossshader.git

```



Then in your `CMakeLists.txt` file, include the following:



```cmake

# ⬇ Add your dependency:

add_subdirectories(external/crossshader)



# 🔗 Link CrossShader to your project:

target_link_libraries(

    ${PROJECT_NAME}

    CrossShader

)

```



## Usage



This library exposes a single function `compile(...)` and its config structs/enums, and returns either the output string, or throws an exception if there's an error compiling, with the error message exposed in the exception object.



### Node.js Example



TypeScript types are included, refer to [`cross-shader.d.ts`](/cross-shader.d.ts) for more details.



Similar to other WebAssembly modules, importing the module gives you a promise to the compiled WebAssembly binary:



```js

import xsdr from "cross-shader";



xsdr.then(({ compile, ShaderFormat, ShaderStage }) => {

  const ioptions = {

    format: ShaderFormat.GLSL,

    stage: ShaderStage.Vertex,

    es: false,

    glslVersion: 450,

  };



  const ooptions = {

    format: ShaderFormat.GLSL,

    es: true,

    glslVersion: 100,

  };



  let outputString = compile(inputString, ioptions, ooptions);

});

```



### C++ Example



Refer to [`src/CrossShader/CrossShader.h`](/src/CrossShader.h) for more details.



```cpp

#include "CrossShader/CrossShader.h"



void main()

{

  xsdr::InputOptions ioptions;

  ioptions.format = xsdr::ShaderFormat::GLSL;

  ioptions.stage = xsdr::ShaderStage::Vertex;

  ioptions.es = false;

  ioptions.glslVersion = 110;



  xsdr::OutputOptions ooptions;

  ooptions.format = xsdr::ShaderFormat::GLSL;

  ooptions.es = true;

  ooptions.glslVersion = 100;



  std::string out = xsdr::compile(vertSource, ioptions, ooptions);

}

```



## Development



Be sure to have:



- [Git](https://git-scm.com/downloads)



- Any terminal such as [Hyper](https://hyper.is/)



And type the following in any folder:



```bash

# 🐑 Clone the repo

git clone https://github.com/alaingalvan/crossshader.git --recurse-submodules



# 💿 go inside the folder

cd crossshader



# 👯 If you forget to `recurse-submodules` you can always run:

git submodule update --init



```



From there we'll need to set up our build files. Be sure to have the following installed:



- [CMake](https://cmake.org/)



- An IDE such as [Visual Studio](https://visualstudio.microsoft.com/downloads/), [XCode](https://developer.apple.com/xcode/), or a compiler such as [GCC](https://gcc.gnu.org/).



Then type the following in your terminal from the repo folder:



```bash

# 🖼️ To build your Visual Studio solution on Windows x64

cmake . -B build/vs -A x64



# 🍎 To build your XCode project on Mac OS

cmake .. -B build/xcode -G Xcode



# 🐧 To build your MakeFile on Linux

cmake -B build/make ..



# 🔨 Build on any platform:

cmake --build .

```



Whenever you add new files to the project, run `cmake ..` from your solution/project folder, and if you edit the `CMakeLists.txt` file be sure to delete the generated files and run Cmake again.



### WebAssembly



**Note**: if you're on Windows, I would highly recommend using the [Windows Subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/install-win10#install-the-windows-subsystem-for-linux).



First, install the latest version of Emscripten via the [Emscripten SDK](https://kripken.github.io/emscripten-site/docs/getting_started/downloads.html). Make sure to add it's Emscripten installation to your `PATH`, then:



```bash

# ⚠️ Possible dependencies you might need:

sudo apt-get update

sudo apt-get install cmake build-essential llvm



# 🏃 Then run the following:

emcmake cmake . -B build/wasm

emmake make CrossShader -j

```



## License



CrossShader is licensed as either **MIT** or **Apache-2.0**, whichever you would prefer.



[cmake-img]: https://img.shields.io/badge/cmake-3.6-1f9948.svg?style=flat-square

[cmake-url]: https://cmake.org/

[license-img]: https://img.shields.io/:license-mit-blue.svg?style=flat-square

[license-url]: https://opensource.org/licenses/MIT

[travis-img]: https://img.shields.io/travis/com/alaingalvan/crossshader.svg?style=flat-square

[travis-url]: https://www.travis-ci.com/github/alaingalvan/crossshader

[npm-img]: https://img.shields.io/npm/v/cross-shader.svg?style=flat-square

[npm-url]: http://npm.im/cross-shader

[npm-download-img]: https://img.shields.io/npm/dm/cross-shader.svg?style=flat-square

[deps-url]: https://libraries.io/npm/cross-shader

[deps-img]: https://img.shields.io/librariesio/release/npm/cross-shader?style=flat-square

[codecov-img]: https://img.shields.io/codecov/c/github/alaingalvan/crossshader.svg?style=flat-square

[codecov-url]: https://codecov.io/gh/alaingalvan/crossshader