resources: extract shader authoring parser

engine/CMakeLists.txt

@@ -387,6 +387,8 @@ add_library(XCEngine STATIC
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Resources/Material/MaterialLoader.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Resources/Shader/Shader.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Resources/Shader/ShaderLoader.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/Resources/Shader/ShaderAuthoringParser.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/Resources/Shader/ShaderAuthoringParser.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Resources/AudioClip/AudioClip.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Resources/AudioClip/AudioLoader.cpp
     ${XCENGINE_OPTIONAL_UI_RESOURCE_SOURCES}

engine/src/Resources/Shader/ShaderAuthoringParser.h

@@ -0,0 +1,99 @@
+#pragma once
+
+#include <XCEngine/Core/Containers/Array.h>
+#include <XCEngine/Core/Containers/String.h>
+#include <XCEngine/Resources/Shader/Shader.h>
+
+#include <string>
+#include <unordered_set>
+#include <vector>
+
+namespace XCEngine {
+namespace Resources {
+
+enum class ShaderAuthoringStyle {
+    NotShaderAuthoring = 0,
+    LegacyBackendSplit,
+    UnityStyleSingleSource
+};
+
+struct AuthoringTagEntry {
+    Containers::String name;
+    Containers::String value;
+};
+
+struct AuthoringBackendVariantEntry {
+    ShaderBackend backend = ShaderBackend::Generic;
+    ShaderLanguage language = ShaderLanguage::GLSL;
+    Containers::String vertexSourcePath;
+    Containers::String fragmentSourcePath;
+    Containers::String vertexProfile;
+    Containers::String fragmentProfile;
+};
+
+struct AuthoringPassEntry {
+    Containers::String name;
+    bool hasFixedFunctionState = false;
+    MaterialRenderState fixedFunctionState = {};
+    std::vector<AuthoringTagEntry> tags;
+    Containers::Array<ShaderResourceBindingDesc> resources;
+    Containers::Array<ShaderKeywordDeclaration> keywordDeclarations;
+    Containers::String vertexEntryPoint;
+    Containers::String fragmentEntryPoint;
+    Containers::String sharedProgramSource;
+    Containers::String programSource;
+    Containers::String targetProfile;
+    std::vector<AuthoringBackendVariantEntry> backendVariants;
+};
+
+struct AuthoringSubShaderEntry {
+    bool hasFixedFunctionState = false;
+    MaterialRenderState fixedFunctionState = {};
+    std::vector<AuthoringTagEntry> tags;
+    Containers::String sharedProgramSource;
+    std::vector<AuthoringPassEntry> passes;
+};
+
+struct AuthoringShaderDesc {
+    Containers::String name;
+    Containers::String fallback;
+    Containers::String sharedProgramSource;
+    Containers::Array<ShaderPropertyDesc> properties;
+    std::vector<AuthoringSubShaderEntry> subShaders;
+};
+
+void AppendAuthoringSourceBlock(
+    Containers::String& target,
+    const Containers::String& sourceBlock);
+
+void CollectQuotedIncludeDependencyPaths(
+    const Containers::String& sourcePath,
+    const Containers::String& sourceText,
+    std::unordered_set<std::string>& seenPaths,
+    Containers::Array<Containers::String>& outDependencies);
+
+Containers::String StripUnityStyleAuthoringPragmas(const Containers::String& sourceText);
+
+std::vector<ShaderKeywordSet> BuildShaderKeywordVariantSets(
+    const Containers::Array<ShaderKeywordDeclaration>& declarations);
+
+Containers::String BuildKeywordVariantSource(
+    const Containers::String& baseSource,
+    const ShaderKeywordSet& requiredKeywords);
+
+ShaderAuthoringStyle DetectShaderAuthoringStyle(const std::string& sourceText);
+
+bool ParseLegacyBackendSplitShaderAuthoring(
+    const Containers::String& path,
+    const std::string& sourceText,
+    AuthoringShaderDesc& outDesc,
+    Containers::String* outError);
+
+bool ParseUnityStyleSingleSourceShaderAuthoring(
+    const Containers::String& path,
+    const std::string& sourceText,
+    AuthoringShaderDesc& outDesc,
+    Containers::String* outError);
+
+} // namespace Resources
+} // namespace XCEngine