Added shader cross-compiler using glslc and spirv-cross

Removes the `fixed` parameter from AcquireCommandBuffer, and removes a couple other unused bools from the VulkanCommandBuffer struct.

Co-authored-by: Caleb Cornett <caleb.cornett@outlook.com>
Reviewed-on: MoonsideGames/Refresh#33
Co-authored-by: TheSpydog <thespydog@noreply.example.org>
Co-committed-by: TheSpydog <thespydog@noreply.example.org>

include/Refresh.h

@@ -1168,15 +1168,9 @@ REFRESHAPI Refresh_TextureFormat Refresh_GetSwapchainFormat(
  * 	A command buffer may only be used on the thread that
  * 	it was acquired on. Using it on any other thread is an error.
  *
- * fixed:
- * 	If a command buffer is designated as fixed, it can be
- * 	acquired once, have commands recorded into it, and
- * 	be re-submitted indefinitely.
- *
  */
 REFRESHAPI Refresh_CommandBuffer* Refresh_AcquireCommandBuffer(
-	Refresh_Device *device,
-	uint8_t fixed
+	Refresh_Device *device
 );
 
 /* Acquires a texture to use for presentation.

shadercompiler/Program.cs

@@ -0,0 +1,105 @@
+using System;
+using System.IO;
+using System.Diagnostics;
+
+partial class Program
+{
+	public static int Main(string[] args)
+	{
+		if (args.Length < 2)
+		{
+			Console.WriteLine("Usage: refreshc <path-to-glsl> <output-directory>");
+			return 1;
+		}
+
+		string glslPath = args[0];
+		string outputDir = args[1];
+
+		if (!ValidateArgs(glslPath, outputDir))
+		{
+			return 1;
+		}
+
+		string shaderName = Path.GetFileNameWithoutExtension(glslPath);
+		string shaderType = Path.GetExtension(glslPath);
+		string spirvPath = Path.Combine(outputDir, $"{shaderName}.spv");
+
+		if (CompileGlslToSpirv(glslPath, shaderName, spirvPath) != 0)
+		{
+			return 1;
+		}
+
+		string hlslPath = Path.Combine(outputDir, $"{shaderName}.hlsl");
+		if (TranslateSpirvToHlsl(spirvPath, hlslPath) != 0)
+		{
+			return 1;
+		}
+
+		// FIXME: Is there a cross-platform way to compile HLSL to DXBC?
+
+#if PS5
+		if (TranslateHlslToPS5(hlslPath, shaderName, shaderType, outputDir) != 0)
+		{
+			return 1;
+		}
+#endif
+
+		return 0;
+	}
+
+	static bool ValidateArgs(string glslPath, string outputDir)
+	{
+		if (!File.Exists(glslPath))
+		{
+			Console.WriteLine($"refreshc: glsl source file ({glslPath}) does not exist");
+			return false;
+		}
+
+		string ext = Path.GetExtension(glslPath);
+		if (ext != ".vert" && ext != ".frag" && ext != ".comp")
+		{
+			Console.WriteLine("refreshc: Expected glsl source file with extension '.vert', '.frag', or '.comp'");
+			return false;
+		}
+
+		if (!Directory.Exists(outputDir))
+		{
+			Console.WriteLine($"refreshc: Output directory ({outputDir}) does not exist");
+			return false;
+		}
+
+		return true;
+	}
+
+	static int CompileGlslToSpirv(string glslPath, string shaderName, string outputPath)
+	{
+		Process glslc = Process.Start(
+			"glslc",
+			$"{glslPath} -o {outputPath}"
+		);
+		glslc.WaitForExit();
+		if (glslc.ExitCode != 0)
+		{
+			Console.WriteLine($"refreshc: Could not compile GLSL code");
+			return 1;
+		}
+
+		return 0;
+	}
+
+	static int TranslateSpirvToHlsl(string spirvPath, string outputPath)
+	{
+		Process spirvcross = Process.Start(
+			"spirv-cross",
+			$"{spirvPath} --hlsl --shader-model 50 --output {outputPath}"
+		);
+		spirvcross.WaitForExit();
+		if (spirvcross.ExitCode != 0)
+		{
+			Console.WriteLine($"refreshc: Could not translate SPIR-V to HLSL");
+			return 1;
+		}
+
+		return 0;
+	}
+}

shadercompiler/refreshc.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <TargetName>refreshc</TargetName>
+  </PropertyGroup>
+
+</Project>

src/Refresh.c

@@ -789,13 +789,11 @@ void Refresh_UnclaimWindow(
 }
 
 Refresh_CommandBuffer* Refresh_AcquireCommandBuffer(
-	Refresh_Device *device,
-	uint8_t fixed
+	Refresh_Device *device
 ) {
 	NULL_RETURN_NULL(device);
 	return device->AcquireCommandBuffer(
-		device->driverData,
-		fixed
+		device->driverData
 	);
 }
 

src/Refresh_Driver.h

@@ -470,8 +470,7 @@ struct Refresh_Device
 	);
 
 	Refresh_CommandBuffer* (*AcquireCommandBuffer)(
-		Refresh_Renderer *driverData,
-		uint8_t fixed
+		Refresh_Renderer *driverData
 	);
 
 	Refresh_Texture* (*AcquireSwapchainTexture)(

src/Refresh_Driver_Vulkan.c

@@ -1500,10 +1500,6 @@ typedef struct VulkanCommandPool VulkanCommandPool;
 typedef struct VulkanCommandBuffer
 {
 	VkCommandBuffer commandBuffer;
-	uint8_t fixed;
-	uint8_t submitted;
-	uint8_t renderPassInProgress;
-
 	VulkanCommandPool *commandPool;
 
 	VulkanPresentData *presentDatas;
@@ -4662,11 +4658,7 @@ static void VULKAN_INTERNAL_BeginCommandBuffer(
 	beginInfo.pNext = NULL;
 	beginInfo.flags = 0;
 	beginInfo.pInheritanceInfo = NULL;
-
-	if (!commandBuffer->fixed)
-	{
 	beginInfo.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
-	}
 
 	result = renderer->vkBeginCommandBuffer(
 		commandBuffer->commandBuffer,
@@ -8484,8 +8476,6 @@ static void VULKAN_BeginRenderPass(
 		VK_SUBPASS_CONTENTS_INLINE
 	);
 
-	vulkanCommandBuffer->renderPassInProgress = 1;
-
 	SDL_stack_free(clearValues);
 
 	for (i = 0; i < colorAttachmentCount; i += 1)
@@ -8622,7 +8612,6 @@ static void VULKAN_EndRenderPass(
 	vulkanCommandBuffer->renderPassDepthTexture = NULL;
 
 	vulkanCommandBuffer->currentGraphicsPipeline = NULL;
-	vulkanCommandBuffer->renderPassInProgress = 0;
 }
 
 static void VULKAN_BindGraphicsPipeline(
@@ -9197,8 +9186,7 @@ static VulkanCommandBuffer* VULKAN_INTERNAL_GetInactiveCommandBufferFromPool(
 }
 
 static Refresh_CommandBuffer* VULKAN_AcquireCommandBuffer(
-	Refresh_Renderer *driverData,
-	uint8_t fixed
+	Refresh_Renderer *driverData
 ) {
 	VulkanRenderer *renderer = (VulkanRenderer*) driverData;
 	VkResult result;
@@ -9221,10 +9209,6 @@ static Refresh_CommandBuffer* VULKAN_AcquireCommandBuffer(
 	commandBuffer->fragmentUniformBuffer = NULL;
 	commandBuffer->computeUniformBuffer = NULL;
 
-	commandBuffer->fixed = fixed;
-	commandBuffer->submitted = 0;
-
-	commandBuffer->renderPassInProgress = 0;
 	commandBuffer->renderPassColorTargetCount = 0;
 
 	VULKAN_INTERNAL_BeginCommandBuffer(renderer, commandBuffer);
@@ -9920,7 +9904,6 @@ static void VULKAN_Submit(
 			);
 		}
 
-		((VulkanCommandBuffer*)pCommandBuffers[i])->submitted = 1;
 		renderer->submittedCommandBuffers[renderer->submittedCommandBufferCount] = (VulkanCommandBuffer*) pCommandBuffers[i];
 		renderer->submittedCommandBufferCount += 1;