WIP: Metal Backend

CMakeLists.txt

@@ -30,6 +30,10 @@ else()
 	project(flycast)
 endif()
 
+if(APPLE)
+	enable_language(OBJC OBJCXX)
+endif()
+
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 if(CMAKE_SYSTEM_NAME STREQUAL "NetBSD" OR NINTENDO_SWITCH)
@@ -62,6 +66,7 @@ option(USE_HOST_SDL "Use host SDL library" ${USE_HOST_SDL_DEFAULT})
 option(USE_HOST_LIBCHDR "Use host libchdr" OFF)
 option(USE_OPENMP "Use OpenMP if available" ON)
 option(USE_VULKAN "Build with Vulkan support" ON)
+option(USE_METAL "Build with Metal support" ON)
 option(USE_DX9 "Build with Direct3D 9 support" ON)
 option(USE_DX11 "Build with Direct3D 11 support" ON)
 option(LIBRETRO "Build libretro core" OFF)
@@ -71,7 +76,7 @@ option(USE_ALSA "Build with ALSA support" ON)
 option(USE_LIBAO "Build with AO support" ON)
 option(USE_OSS "Build with OSS support" OFF)
 option(USE_PULSEAUDIO "Build with PulseAudio support" ON)
-option(USE_BREAKPAD "Build and link with breakpad library" ON)
+option(USE_BREAKPAD "Build and link with breakpad library" OFF)
 option(USE_LUA "Build with Lua support" ON)
 option(ENABLE_GDB_SERVER "Build with GDB debugging support" OFF)
 option(ENABLE_DC_PROFILER "Build with support for target machine (SH4) profiler" OFF)
@@ -83,6 +88,10 @@ if(IOS AND NOT LIBRETRO)
 	set(USE_VULKAN OFF CACHE BOOL "Force vulkan off" FORCE)
 endif()
 
+if(NOT APPLE)
+	set(USE_METAL OFF CACHE BOOL "Force metal off" FORCE)
+endif()
+
 include(GNUInstallDirs)
 include(CMakeRC)
 
@@ -1337,8 +1346,15 @@ endif()
 target_sources(${PROJECT_NAME} PRIVATE
 		core/wsi/context.h
 		core/wsi/libretro.cpp
-		core/wsi/libretro.h
+		core/wsi/libretro.h)
+
+if(USE_METAL)
+	target_sources(${PROJECT_NAME} PRIVATE
+		core/wsi/switcher.mm)
+else()
+	target_sources(${PROJECT_NAME} PRIVATE
 		core/wsi/switcher.cpp)
+endif()
 
 if(USE_OPENGL)
 	target_compile_definitions(${PROJECT_NAME} PRIVATE USE_OPENGL)
@@ -1511,6 +1527,35 @@ if(USE_VULKAN)
 	endif()
 endif()
 
+if(APPLE AND USE_METAL)
+	target_link_libraries(${PROJECT_NAME} PRIVATE "-framework Metal -framework QuartzCore -framework CoreGraphics")
+
+	target_compile_definitions(${PROJECT_NAME} PRIVATE USE_METAL HAVE_METAL)
+	target_sources(${PROJECT_NAME} PRIVATE
+			core/rend/metal/metal_renderer.h
+			core/rend/metal/metal_renderer.mm
+			core/rend/metal/metal_context.h
+			core/rend/metal/metal_context.mm
+			core/rend/metal/metal_shaders.h
+			core/rend/metal/metal_shaders.mm
+			core/rend/metal/metal_texture.h
+			core/rend/metal/metal_texture.mm
+			core/rend/metal/metal_pipeline.h
+			core/rend/metal/metal_pipeline.mm
+			core/rend/metal/metal_buffer.h
+			core/rend/metal/metal_buffer.mm
+			core/rend/metal/metal_drawer.h
+			core/rend/metal/metal_drawer.mm
+			core/rend/metal/metal_quad.h
+			core/rend/metal/metal_quad.mm
+			core/rend/metal/metal_commandpool.h
+			core/rend/metal/metal_commandpool.mm
+			core/rend/metal/metal.h
+			core/rend/metal/metal_driver.h
+			core/deps/imgui/backends/imgui_impl_metal.h
+			core/deps/imgui/backends/imgui_impl_metal.mm)
+endif()
+
 if(WIN32 AND USE_DX9 AND NOT LIBRETRO AND NOT WINDOWS_STORE AND ("x86" IN_LIST ARCHITECTURE OR "x86_64" IN_LIST ARCHITECTURE))
 	set(REND_DX9_FILES
 		core/rend/dx9/d3d_overlay.h

core/cfg/option.h

@@ -415,6 +415,8 @@ class RendererOption : public Option<RenderType> {
 			RenderType::DirectX11
 #elif defined(USE_DX9)
 			RenderType::DirectX9
+#elif defined(USE_METAL)
+			RenderType::Metal
 #elif !defined(USE_OPENGL)
 			RenderType::Vulkan
 #else

core/deps/imgui/backends/imgui_impl_metal.h

@@ -0,0 +1,75 @@
+// dear imgui: Renderer Backend for Metal
+// This needs to be used along with a Platform Backend (e.g. OSX)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'MTLTexture' as ImTextureID. Read the FAQ about ImTextureID!
+//  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
+
+// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
+// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
+// Learn about Dear ImGui:
+// - FAQ                  https://dearimgui.com/faq
+// - Getting Started      https://dearimgui.com/getting-started
+// - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
+// - Introduction, links and more at the top of imgui.cpp
+
+#pragma once
+#include "imgui.h"      // IMGUI_IMPL_API
+#ifndef IMGUI_DISABLE
+
+//-----------------------------------------------------------------------------
+// ObjC API
+//-----------------------------------------------------------------------------
+
+#ifdef __OBJC__
+
+@class MTLRenderPassDescriptor;
+@protocol MTLDevice, MTLCommandBuffer, MTLRenderCommandEncoder;
+
+// Follow "Getting Started" link and check examples/ folder to learn about using backends!
+IMGUI_IMPL_API bool ImGui_ImplMetal_Init(id<MTLDevice> device);
+IMGUI_IMPL_API void ImGui_ImplMetal_Shutdown();
+IMGUI_IMPL_API void ImGui_ImplMetal_NewFrame(MTLRenderPassDescriptor* renderPassDescriptor);
+IMGUI_IMPL_API void ImGui_ImplMetal_RenderDrawData(ImDrawData* drawData,
+                                                   id<MTLCommandBuffer> commandBuffer,
+                                                   id<MTLRenderCommandEncoder> commandEncoder);
+
+// Called by Init/NewFrame/Shutdown
+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
+
+//-----------------------------------------------------------------------------
+// C++ API
+//-----------------------------------------------------------------------------
+
+// Enable Metal C++ binding support with '#define IMGUI_IMPL_METAL_CPP' in your imconfig.h file
+// More info about using Metal from C++: https://developer.apple.com/metal/cpp/
+
+#ifdef IMGUI_IMPL_METAL_CPP
+#include <Metal/Metal.hpp>
+#ifndef __OBJC__
+
+// Follow "Getting Started" link and check examples/ folder to learn about using backends!
+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);
+
+// Called by Init/NewFrame/Shutdown
+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
+
+//-----------------------------------------------------------------------------
+
+#endif // #ifndef IMGUI_DISABLE