metal: add command recorder for command management

src/video_core/CMakeLists.txt

@@ -374,6 +374,7 @@ if (APPLE)
     )
 
     list(APPEND sources
+        renderer_metal/mtl_command_recorder.mm
         renderer_metal/mtl_device.mm
         renderer_metal/mtl_rasterizer.mm
         renderer_metal/mtl_swap_chain.mm

src/video_core/renderer_metal/mtl_command_recorder.h

@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "objc_bridge.h"
+#include "video_core/renderer_metal/objc_bridge.h"
+
+namespace Metal {
+
+class Device;
+
+enum class EncoderType { Render, Compute, Blit };
+
+class CommandRecorder {
+public:
+    CommandRecorder(const Device& device_);
+    ~CommandRecorder();
+
+    void BeginRenderPass(MTLRenderPassDescriptor* render_pass_descriptor);
+
+    void RequireComputeEncoder();
+
+    void RequireBlitEncoder();
+
+    void EndEncoding();
+
+    void Present(CAMetalDrawable_t drawable);
+
+    void Submit();
+
+    MTLCommandBuffer_t GetCommandBuffer() {
+        return command_buffer;
+    }
+
+    MTLCommandEncoder_t GetCommandEncoder() {
+        return encoder;
+    }
+
+private:
+    const Device& device;
+
+    MTLCommandBuffer_t command_buffer = nil;
+    MTLCommandEncoder_t encoder = nil;
+
+    EncoderType encoder_type;
+
+    void RequireCommandBuffer();
+};
+
+} // namespace Metal

src/video_core/renderer_metal/mtl_command_recorder.mm

@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "video_core/renderer_metal/mtl_command_recorder.h"
+#include "video_core/renderer_metal/mtl_device.h"
+
+#include <iostream>
+
+namespace Metal {
+
+CommandRecorder::CommandRecorder(const Device& device_) : device(device_) {}
+
+CommandRecorder::~CommandRecorder() = default;
+
+void CommandRecorder::BeginRenderPass(MTLRenderPassDescriptor* render_pass_descriptor) {
+    RequireCommandBuffer();
+    EndEncoding();
+    encoder = [command_buffer renderCommandEncoderWithDescriptor:render_pass_descriptor];
+    encoder_type = EncoderType::Render;
+}
+
+void CommandRecorder::RequireComputeEncoder() {
+    RequireCommandBuffer();
+    if (!encoder || encoder_type != EncoderType::Compute) {
+        EndEncoding();
+        encoder = [command_buffer computeCommandEncoder];
+        encoder_type = EncoderType::Compute;
+    }
+}
+
+void CommandRecorder::RequireBlitEncoder() {
+    RequireCommandBuffer();
+    if (!encoder || encoder_type != EncoderType::Blit) {
+        EndEncoding();
+        encoder = [command_buffer blitCommandEncoder];
+        encoder_type = EncoderType::Blit;
+    }
+}
+
+void CommandRecorder::EndEncoding() {
+    if (encoder) {
+        [encoder endEncoding];
+        [encoder release];
+        encoder = nil;
+    }
+}
+
+void CommandRecorder::Present(CAMetalDrawable_t drawable) {
+    [command_buffer presentDrawable:drawable];
+}
+
+void CommandRecorder::Submit() {
+    EndEncoding();
+    [command_buffer commit];
+    [command_buffer release];
+    command_buffer = nil;
+}
+
+void CommandRecorder::RequireCommandBuffer() {
+    if (!command_buffer) {
+        command_buffer = [device.GetCommandQueue() commandBuffer];
+    }
+}
+
+} // namespace Metal

src/video_core/renderer_metal/mtl_rasterizer.h

@@ -3,7 +3,6 @@
 #pragma once
 
 #include "common/common_types.h"
-#include "objc_bridge.h"
 #include "video_core/control/channel_state_cache.h"
 #include "video_core/engines/maxwell_dma.h"
 #include "video_core/rasterizer_interface.h"

src/video_core/renderer_metal/mtl_swap_chain.h

@@ -7,23 +7,26 @@
 namespace Metal {
 
 class Device;
+class CommandRecorder;
 
 class SwapChain {
 public:
-    SwapChain(const Device& device_, const CAMetalLayer* layer_);
+    SwapChain(const Device& device_, CommandRecorder& command_recorder_,
+              const CAMetalLayer* layer_);
     ~SwapChain();
 
     void AcquireNextDrawable();
 
-    void Present(MTLCommandBuffer_t command_buffer);
+    void Present();
 
     MTLTexture_t GetDrawableTexture();
 
 private:
     const Device& device;
+    CommandRecorder& command_recorder;
     const CAMetalLayer* layer;
 
-    CAMetalDrawable_t drawable;
+    CAMetalDrawable_t drawable = nil;
 };
 
 } // namespace Metal

src/video_core/renderer_metal/mtl_swap_chain.mm

@@ -1,16 +1,23 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include "video_core/renderer_metal/mtl_command_recorder.h"
 #include "video_core/renderer_metal/mtl_device.h"
 #include "video_core/renderer_metal/mtl_swap_chain.h"
 
 namespace Metal {
 
-SwapChain::SwapChain(const Device& device_, const CAMetalLayer* layer_) : device(device_), layer([layer_ retain]) {
+SwapChain::SwapChain(const Device& device_, CommandRecorder& command_recorder_,
+    const CAMetalLayer* layer_)
+    : device(device_), command_recorder(command_recorder_), layer([layer_ retain]) {
     // Give the layer our device
     layer.device = device.GetDevice();
 }
 
 SwapChain::~SwapChain() {
+    if (drawable) {
+        // TODO: should drawable be released?
+        [drawable release];
+    }
     [layer release];
 }
 
@@ -19,8 +26,9 @@ void SwapChain::AcquireNextDrawable() {
     drawable = [layer nextDrawable];
 }
 
-void SwapChain::Present(MTLCommandBuffer_t command_buffer) {
-    [command_buffer presentDrawable:drawable];
+void SwapChain::Present() {
+    command_recorder.EndEncoding();
+    command_recorder.Present(drawable);
 }
 
 MTLTexture_t SwapChain::GetDrawableTexture() {

src/video_core/renderer_metal/objc_bridge.h

@@ -8,13 +8,17 @@
 typedef id<MTLDevice> MTLDevice_t;
 typedef id<MTLCommandQueue> MTLCommandQueue_t;
 typedef id<MTLCommandBuffer> MTLCommandBuffer_t;
+typedef id<MTLCommandEncoder> MTLCommandEncoder_t;
 typedef id<MTLTexture> MTLTexture_t;
 typedef id<CAMetalDrawable> CAMetalDrawable_t;
 #else
 typedef void* MTLDevice_t;
 typedef void* MTLCommandQueue_t;
 typedef void* MTLCommandBuffer_t;
+typedef void* MTLCommandEncoder_t;
 typedef void* MTLTexture_t;
+typedef void MTLRenderPassDescriptor;
 typedef void CAMetalLayer;
 typedef void* CAMetalDrawable_t;
+#define nil NULL
 #endif

src/video_core/renderer_metal/renderer_metal.h

@@ -8,6 +8,7 @@
 #include "objc_bridge.h"
 #include "video_core/host1x/gpu_device_memory_manager.h"
 #include "video_core/renderer_base.h"
+#include "video_core/renderer_metal/mtl_command_recorder.h"
 #include "video_core/renderer_metal/mtl_device.h"
 #include "video_core/renderer_metal/mtl_rasterizer.h"
 #include "video_core/renderer_metal/mtl_swap_chain.h"
@@ -50,6 +51,7 @@ private:
     Tegra::GPU& gpu;
 
     Device device;
+    CommandRecorder command_recorder;
     SwapChain swap_chain;
 
     RasterizerMetal rasterizer;

src/video_core/renderer_metal/renderer_metal.mm

@@ -13,7 +13,9 @@ RendererMetal::RendererMetal(Core::Frontend::EmuWindow& emu_window,
                              std::unique_ptr<Core::Frontend::GraphicsContext> context_)
     : RendererBase(emu_window, std::move(context_)), device_memory{device_memory_},
       gpu{gpu_}, device{},
-      swap_chain(device, static_cast<const CAMetalLayer*>(render_window.GetWindowInfo().render_surface)),
+      command_recorder(device),
+      swap_chain(device, command_recorder,
+                 static_cast<const CAMetalLayer*>(render_window.GetWindowInfo().render_surface)),
       rasterizer(gpu_, device, swap_chain) {}
 
 RendererMetal::~RendererMetal() = default;
@@ -24,7 +26,6 @@ void RendererMetal::Composite(std::span<const Tegra::FramebufferConfig> framebuf
     }
 
     // HACK
-    @autoreleasepool {
     swap_chain.AcquireNextDrawable();
 
     MTLRenderPassDescriptor* render_pass_descriptor = [MTLRenderPassDescriptor renderPassDescriptor];
@@ -33,13 +34,9 @@ void RendererMetal::Composite(std::span<const Tegra::FramebufferConfig> framebuf
     render_pass_descriptor.colorAttachments[0].storeAction = MTLStoreActionStore;
     render_pass_descriptor.colorAttachments[0].texture = swap_chain.GetDrawableTexture();
 
-        id<MTLCommandBuffer> command_buffer = [device.GetCommandQueue() commandBuffer];
-        id<MTLRenderCommandEncoder> render_encoder = [command_buffer
-                                    renderCommandEncoderWithDescriptor:render_pass_descriptor];
-        [render_encoder endEncoding];
-        swap_chain.Present(command_buffer);
-        [command_buffer commit];
-    }
+    command_recorder.BeginRenderPass(render_pass_descriptor);
+    swap_chain.Present();
+    command_recorder.Submit();
 
     gpu.RendererFrameEndNotify();
     rasterizer.TickFrame();