Reestructura carpetes: src->source, third_party->source/external, shaders->data/shaders

source/rendering/shader_backend.hpp

@@ -0,0 +1,57 @@
+#pragma once
+
+#include <SDL3/SDL.h>
+
+#include <filesystem>
+#include <memory>
+#include <string>
+
+namespace Rendering {
+
+    struct ShaderMetadata {
+        std::string name;
+        std::string author;
+        std::string iChannel0{"none"};
+        std::string iChannel1{"none"};
+        std::string iChannel2{"none"};
+        std::string iChannel3{"none"};
+    };
+
+    struct ShaderUniforms {
+        float iTime{0.0f};
+        float iResolutionX{0.0f};
+        float iResolutionY{0.0f};
+    };
+
+    struct ShaderProgramSpec {
+        std::filesystem::path folder;
+        std::string base_name;
+        ShaderMetadata metadata;
+    };
+
+    class IShaderBackend {
+       public:
+        IShaderBackend() = default;
+        virtual ~IShaderBackend() = default;
+
+        IShaderBackend(const IShaderBackend&) = delete;
+        IShaderBackend(IShaderBackend&&) = delete;
+        auto operator=(const IShaderBackend&) -> IShaderBackend& = delete;
+        auto operator=(IShaderBackend&&) -> IShaderBackend& = delete;
+
+        virtual auto init(SDL_Window* window) -> bool = 0;
+        virtual auto loadShader(const ShaderProgramSpec& spec) -> bool = 0;
+        virtual void render(const ShaderUniforms& uniforms) = 0;
+        virtual void setVSync(bool vsync) = 0;
+        virtual void cleanup() = 0;
+        [[nodiscard]] virtual auto driverName() const -> std::string = 0;
+    };
+
+    [[nodiscard]] auto makeOpenGLBackend() -> std::unique_ptr<IShaderBackend>;
+    [[nodiscard]] auto makeSdl3GpuBackend() -> std::unique_ptr<IShaderBackend>;
+
+    [[nodiscard]] auto extractShaderMetadata(const std::string& source) -> ShaderMetadata;
+    [[nodiscard]] auto loadFileToString(const std::filesystem::path& path, std::string& out) -> bool;
+    [[nodiscard]] auto parseMetaFile(const std::filesystem::path& meta_path) -> ShaderMetadata;
+
+}  // namespace Rendering