ShaderC dependencies and Shader Compilation Refactor

- To reduce compile times, we setup the downloading of the ShaderC
  library to be handled in the CMake workflow
- This way we can extract the glslang compiler that we have downloaded
  and do the shader compilation as part of the CMake Scripting.
- Also We can avoid doing the duplicate work of compiling the glslang,
  SPIRV-Tools and gtest libraries as they are already pre-compiled in
  the ShaderC package.
- This should reduce the compilation times.
- As Currently configured the Shaders will be compiled in each build,
  however, we can improve on this and ensure that compilation is only
  done as required at a later stage

Author: MathewBensonCode

CMakeLists.txt

@@ -43,6 +43,10 @@ if (NOT LAUNCHER_ONLY)
     ## Setup Dependencies
     include(dependencies.cmake)
 
+    ## Compile Shaders
+
+    add_subdirectory (Resources)
+
 	# Core engine lib is here
 	#
 	add_subdirectory (ZEngine)

CMakePresets.json

@@ -64,7 +64,8 @@
             "architecture": "x64",
             "cacheVariables": {
                 "CMAKE_CONFIGURATION_TYPES": "Debug",
-                "CMAKE_INSTALL_PREFIX": "Result.Windows.x64.MultiConfig"
+                "CMAKE_INSTALL_PREFIX": "Result.Windows.x64.MultiConfig",
+                "SHADERC_URL": "https://storage.googleapis.com/shaderc/artifacts/prod/graphics_shader_compiler/shaderc/windows/vs2022_amd64_release_continuous/29/20260112-140346/install.zip"
             }
 
         },
@@ -100,7 +101,8 @@
             "cacheVariables": {
                 "BUILD_FRAMEWORK": "ON",
                 "CMAKE_INSTALL_PREFIX": "Result.Darwin.x64.Debug",
-                "CMAKE_CONFIGURATION_TYPES": "Debug"
+                "CMAKE_CONFIGURATION_TYPES": "Debug",
+                "SHADERC_URL": "https://storage.googleapis.com/shaderc/artifacts/prod/graphics_shader_compiler/shaderc/macos/continuous_clang_release/519/20260112-140351/install.tgz"
             }
         },
         {
@@ -142,7 +144,8 @@
             "binaryDir": "Result.Linux.x64.Debug",
             "generator": "Ninja",
             "cacheVariables": {
-                "CMAKE_INSTALL_PREFIX": "Result.Linux.x64.Debug"
+                "CMAKE_INSTALL_PREFIX": "Result.Linux.x64.Debug",
+                "SHADERC_URL": "https://storage.googleapis.com/shaderc/artifacts/prod/graphics_shader_compiler/shaderc/linux/continuous_clang_release/510/20260112-140346/install.tgz"
             }
         },
         {

Obelisk/CMakeLists.txt

@@ -53,9 +53,6 @@ install(TARGETS ${TARGET_NAME}
     DESTINATION bin
 )
 
-install(DIRECTORY ../Resources/Editor/Settings DESTINATION bin)
-
-install(DIRECTORY ../Resources/Shaders DESTINATION bin)
 
 
 

Resources/CMakeLists.txt

@@ -0,0 +1,33 @@
+set(ShaderPath ${CMAKE_CURRENT_SOURCE_DIR}/Shaders)
+set(ShaderOutputPath "${ShaderPath}/Cache")
+
+file (MAKE_DIRECTORY "${ShaderOutputPath}")
+
+file (GLOB VertexShaders CONFIGURE_DEPENDS "${ShaderPath}/*.vert")
+file (GLOB FragmentShaders CONFIGURE_DEPENDS "${ShaderPath}/*.frag")
+
+foreach(VertexShader ${VertexShaders})
+
+      cmake_path(GET VertexShader STEM shaderfilename)
+      cmake_path(APPEND_STRING shaderfilename "_vertex.spv" OUTPUT_VARIABLE VertexShaderOutputFileName )
+      cmake_path(APPEND ShaderOutputPath ${VertexShaderOutputFileName} OUTPUT_VARIABLE VertexShaderOutputPath)
+
+      add_custom_target("Compile-${shaderfilename}-vertex" ALL COMMAND glslang::glslang-standalone "-I${ShaderPath}" "-V" "-o" "${VertexShaderOutputPath}" "${VertexShader}")
+
+    
+endforeach()
+
+foreach(FragmentShader ${FragmentShaders})
+
+    cmake_path(GET FragmentShader STEM shaderfilename)
+    cmake_path(APPEND_STRING shaderfilename "_fragment.spv" OUTPUT_VARIABLE FragmentShaderOutputFileName )
+    cmake_path(APPEND ShaderOutputPath ${FragmentShaderOutputFileName} OUTPUT_VARIABLE FragmentShaderOutputPath)
+
+
+    add_custom_target("Compile-${shaderfilename}-fragment" ALL COMMAND glslang::glslang-standalone "-V" "-I${ShaderPath}" "-o" "${FragmentShaderOutputPath}" "${FragmentShader}")
+
+endforeach()
+
+install(DIRECTORY Editor/Settings DESTINATION bin)
+
+install(DIRECTORY Shaders/Cache DESTINATION bin/Shaders)

Scripts/BuildEngine.ps1

@@ -174,7 +174,6 @@ function Build([string]$configuration, [int]$VsVersion , [bool]$runBuild) {
     }
 }
 
-
 if(-Not $LauncherOnly) {
 
     # Run Clang format
@@ -195,13 +194,6 @@ if(-Not $LauncherOnly) {
         }
     }
 
-
-    # Run Shader Compilation
-    foreach ($config in $Configurations) {
-        $shaderCompileScript = Join-Path $PSScriptRoot -ChildPath "ShaderCompile.ps1"
-        & pwsh -File $shaderCompileScript -Configuration:$config -ForceRebuild:$true
-    }
-
     if ($LASTEXITCODE -ne 0) {
         Write-Error "Stopped build process..." -ErrorAction Stop
     }

Scripts/PostBuild.ps1

@@ -1,9 +1,7 @@
 file (GLOB_RECURSE HEADER_FILES_LIST CONFIGURE_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
 file (GLOB_RECURSE CPP_FILES_LIST CONFIGURE_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp)
-file (GLOB_RECURSE RESOURCE_FILES_LIST CONFIGURE_DEPENDS ${PROJECT_SOURCE_DIR}/../Resources/Shaders/*.*)
 
 source_group (TREE ${PROJECT_SOURCE_DIR}/ZEngine PREFIX "Source Files" FILES ${HEADER_FILES_LIST} ${CPP_FILES_LIST})
-source_group (TREE ${PROJECT_SOURCE_DIR}/../Resources PREFIX "Resources Files" FILES ${RESOURCE_FILES_LIST})
 
 # ZEngine source files
 #