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

source/rendering/opengl_shader_backend.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <glad/glad.h>
+
+#include "rendering/shader_backend.hpp"
+
+namespace Rendering {
+
+    class OpenGLShaderBackend final : public IShaderBackend {
+       public:
+        OpenGLShaderBackend() = default;
+        ~OpenGLShaderBackend() override;
+
+        auto init(SDL_Window* window) -> bool override;
+        auto loadShader(const ShaderProgramSpec& spec) -> bool override;
+        void render(const ShaderUniforms& uniforms) override;
+        void setVSync(bool vsync) override;
+        void cleanup() override;
+        [[nodiscard]] auto driverName() const -> std::string override { return "OpenGL"; }
+
+       private:
+        auto createFeedbackFBO(int width, int height) -> bool;
+        void destroyFeedbackFBO();
+
+        SDL_Window* window_{nullptr};
+        SDL_GLContext gl_context_{nullptr};
+
+        GLuint vao_{0};
+        GLuint vbo_{0};
+        GLuint current_program_{0};
+
+        GLuint feedback_fbo_{0};
+        GLuint feedback_texture_{0};
+        bool current_shader_uses_feedback_{false};
+        int feedback_channel_{-1};
+        int feedback_width_{0};
+        int feedback_height_{0};
+    };
+
+}  // namespace Rendering