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Add Apple Metal C++ bindings support. #4824

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Add Apple Metal C++ bindings support. #4824

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aeb74e3
Add Metal C++ bindings support.
luigifcruz Dec 23, 2021
6b1e826
Fix coding style.
luigifcruz Dec 23, 2021
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31 changes: 31 additions & 0 deletions backends/imgui_impl_metal.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,8 @@

#include "imgui.h" // IMGUI_IMPL_API

#ifdef __OBJC__

@class MTLRenderPassDescriptor;
@protocol MTLDevice, MTLCommandBuffer, MTLRenderCommandEncoder;

Expand All @@ -27,3 +29,32 @@ IMGUI_IMPL_API bool ImGui_ImplMetal_CreateFontsTexture(id<MTLDevice> device);
IMGUI_IMPL_API void ImGui_ImplMetal_DestroyFontsTexture();
IMGUI_IMPL_API bool ImGui_ImplMetal_CreateDeviceObjects(id<MTLDevice> device);
IMGUI_IMPL_API void ImGui_ImplMetal_DestroyDeviceObjects();

#endif

// Enable Metal C++ binding support with
//#define IMGUI_IMPL_METAL_CPP // imconfig.h
// More info about this binding:
// https://developer.apple.com/metal/cpp/

#ifdef IMGUI_IMPL_METAL_CPP

#include <Metal/Metal.hpp>

#ifndef __OBJC__

IMGUI_IMPL_API bool ImGui_ImplMetal_Init(MTL::Device* device);
IMGUI_IMPL_API void ImGui_ImplMetal_Shutdown();
IMGUI_IMPL_API void ImGui_ImplMetal_NewFrame(MTL::RenderPassDescriptor* renderPassDescriptor);
IMGUI_IMPL_API void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data,
MTL::CommandBuffer* commandBuffer,
MTL::RenderCommandEncoder* commandEncoder);

IMGUI_IMPL_API bool ImGui_ImplMetal_CreateFontsTexture(MTL::Device* device);
IMGUI_IMPL_API void ImGui_ImplMetal_DestroyFontsTexture();
IMGUI_IMPL_API bool ImGui_ImplMetal_CreateDeviceObjects(MTL::Device* device);
IMGUI_IMPL_API void ImGui_ImplMetal_DestroyDeviceObjects();

#endif

#endif
31 changes: 31 additions & 0 deletions backends/imgui_impl_metal.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,37 @@ - (void)renderDrawData:(ImDrawData *)drawData

static MetalContext *g_sharedMetalContext = nil;

#ifdef IMGUI_IMPL_METAL_CPP

#pragma mark - ImGui Metal C++ Bindings

bool ImGui_ImplMetal_Init(MTL::Device* device) {
return ImGui_ImplMetal_Init((id<MTLDevice>)(device));
}

void ImGui_ImplMetal_NewFrame(MTL::RenderPassDescriptor* renderPassDescriptor) {
ImGui_ImplMetal_NewFrame((MTLRenderPassDescriptor*)(renderPassDescriptor));
}

void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data,
MTL::CommandBuffer* commandBuffer,
MTL::RenderCommandEncoder* commandEncoder) {
ImGui_ImplMetal_RenderDrawData(draw_data,
(id<MTLCommandBuffer>)(commandBuffer),
(id<MTLRenderCommandEncoder>)(commandEncoder));

}

bool ImGui_ImplMetal_CreateFontsTexture(MTL::Device* device) {
return ImGui_ImplMetal_CreateFontsTexture((id<MTLDevice>)(device));
}

bool ImGui_ImplMetal_CreateDeviceObjects(MTL::Device* device) {
return ImGui_ImplMetal_CreateDeviceObjects((id<MTLDevice>)(device));
}

#endif

#pragma mark - ImGui API implementation

bool ImGui_ImplMetal_Init(id<MTLDevice> device)
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