Merge pull request #2 from kd7tck/vulkan-plan-review

I've reviewed the Vulkan upgrade plan and added my findings to the `v…

vulkan-upgrade-plan

@@ -434,3 +434,55 @@ This document outlines the necessary modifications to integrate Vulkan support i
 
 This plan provides a high-level overview. Each point, especially within `rlgl_vulkan.c`, involves significant implementation detail.
 The core principle is to abstract Vulkan complexities within `rlgl` and the platform layer, keeping the raylib API consistent for the end-user.
+
+
+## Review Findings (Task: Double check the plan for errors and make certain the plan will even work)
+
+**Review Date:** 2024-07-26
+**Reviewer:** Jules (AI Software Engineering Agent)
+
+This section summarizes the findings from a review of the "Raylib Vulkan Upgrade Plan." The review aimed to check the plan for errors, assess its feasibility, and ensure its overall viability.
+
+**1. Status of Existing Vulkan Implementation in Repository:**
+*   A thorough check of the repository confirmed that **raylib does not currently have an integrated Vulkan rendering backend within its core `src` files.**
+*   Vulkan-related code identified is confined to:
+    *   External libraries (`GLFW` via `src/external/glfw/deps/glad/vulkan.h` and `RGFW` via `src/external/RGFW.h`), which provide Vulkan surface creation and instance extension support. This is standard for windowing libraries and does not constitute a raylib rendering backend.
+    *   The `vulkan-upgrade-plan` document itself.
+*   Conclusion: The `vulkan-upgrade-plan` is prospective and does not duplicate existing or partially implemented work within raylib's core rendering pipeline.
+
+**2. Overall Viability and Strengths of the Plan:**
+*   The `vulkan-upgrade-plan` is **highly viable** and presents a **comprehensive, well-researched strategy** for integrating a Vulkan backend.
+*   **Key Strengths:**
+    *   **Clear Abstraction Strategy:** The proposed new abstraction layer (`rlvk` or integrated into `rlgl`) is a sound architectural approach, mirroring the existing `rlgl` layer for OpenGL.
+    *   **Detailed Technical Breakdown:** The plan meticulously details responsibilities for Vulkan initialization/deinitialization, the rendering loop, and management of resources like textures, buffers, shaders (SPIR-V), descriptor sets, and pipeline layouts.
+    *   **Actionable Implementation Steps:** The file-by-file breakdown for CMake, core raylib files, and platform layers offers a clear roadmap.
+    *   **Correct Vulkan Fundamentals:** The plan accurately identifies core Vulkan requirements (SPIR-V, explicit synchronization, descriptor sets, command buffer structure).
+    *   **Realistic Challenge Assessment:** The document acknowledges the inherent complexities of Vulkan and the challenges in maintaining raylib's simplicity.
+
+**3. Areas for Minor Refinement/Clarification during Detailed Design:**
+*   **Naming and Dispatch Consistency:**
+    *   Finalize the naming convention (e.g., `rlvk.c`/`rlvk.h` vs. `rlgl_vulkan.c`).
+    *   Clarify the precise dispatch mechanism for raylib API calls to the Vulkan backend (e.g., internal conditional compilation within existing `rlgl` functions is suggested as a clean approach).
+*   **`VkInstance` Creation Responsibility:**
+    *   Clearly delineate whether the platform layer or the core Vulkan backend (`rlvkInit`/`rlglInit_Vulkan`) is responsible for `vkCreateInstance` creation (typically the core backend, using extensions provided by the platform layer).
+*   **Advanced Vulkan Considerations (for future robustness/performance):**
+    *   **Dynamic States:** Acknowledge the potential use of Vulkan's dynamic states to reduce PSO permutations.
+    *   **Render Pass Extensibility:** Consider how the render pass system might evolve for advanced techniques (e.g., deferred rendering, subpasses), though a single default pass is suitable initially.
+    *   **Explicit Synchronization:** While implied, ensure detailed planning for `VkImageMemoryBarrier`, `VkBufferMemoryBarrier`, and `VkEvent` usage for all resource transitions and updates.
+    *   **Multithreaded Command Buffer Generation:** Note as a potential future optimization.
+*   **Device Feature Enablement:** Explicitly include querying and enabling necessary `VkPhysicalDeviceFeatures` during `VkDevice` creation.
+*   **Swapchain Recreation:** Detail the strategy for robustly handling window resizing and the necessary swapchain recreation, including all dependent resources (image views, framebuffers).
+
+**4. Key Challenges and Feasibility:**
+*   **Feasibility:** The project is **technically feasible but highly ambitious.**
+*   **Primary Challenge:** The most significant task is creating an abstraction layer that effectively shields raylib users from Vulkan's inherent complexity, preserving the library's hallmark ease of use and gentle learning curve.
+*   **Resource Intensive:** Requires substantial, dedicated development effort and deep Vulkan expertise.
+*   **Performance:** Achieving performance parity or improvement over optimized OpenGL requires careful Vulkan-specific design, not just a direct translation of concepts.
+*   **Maintenance:** Introducing a second major graphics backend will significantly increase the long-term maintenance load, requiring expertise in both APIs.
+
+**5. Conclusion of Review:**
+*   The `vulkan-upgrade-plan` is an **excellent and well-conceived document.** It provides a solid and viable foundation for integrating a Vulkan rendering backend into raylib.
+*   The plan is free of obvious conceptual errors regarding Vulkan or raylib's architecture. The identified areas for refinement are minor and typical for a high-level plan transitioning to detailed design.
+*   The success of this ambitious project will depend on the availability of dedicated resources with strong Vulkan expertise, rigorous testing, and a continued commitment to raylib's core philosophy of simplicity.
+
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