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mtlpp - C++ wrapper around Metal

Complete wrapper around Metal (Apple's low-level graphics API).

#include "mtlpp.hpp"

int main()
{
    mtlpp::Device device = mtlpp::Device::CreateSystemDefaultDevice();

    mtlpp::CommandQueue commandQueue = device.NewCommandQueue();
    mtlpp::CommandBuffer commandBuffer = commandQueue.CommandBuffer();

    mtlpp::TextureDescriptor textureDesc = mtlpp::TextureDescriptor::Texture2DDescriptor(
        mtlpp::PixelFormat::RGBA8Unorm, 320, 240, false);
    textureDesc.SetUsage(mtlpp::TextureUsage::RenderTarget);
    mtlpp::Texture texture = device.NewTexture(textureDesc);

    // ...

    return 0;
}

Main features

  • Complete API wrapper (iOS 10, tvOS 10, and OS X 10.12).
  • Objective-C free headers - allow compiling agains the Metal API on any platform (no linking on platforms without Metal).
  • Configurable AVAILABILITY and DEPRECATED validation.
  • Amalgamated mtlpp.hpp and mtlpp.mm - or use the contents of src/ folder.

Interop

mtlpp uses Toll-Free Bridging. The example below demonstrates how MTKView (MetalKit) can interop with mtlpp.

   MTKView * mtkView;

   // Objective-C to C++
   mtlpp::Device device = ns::Handle{ (__bridge void*)mtkView.device };

   // C++ to Objective-C
   mtkView.device = (__bridge id<MTLDevice>)device.GetPtr();

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Languages

  • Objective-C++ 62.5%
  • C++ 36.5%
  • Shell 1.0%