From 8155b12d3d8963ec4d8727614ffb522a33389cbf Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 27 May 2019 20:50:11 -0300
Subject: gl_buffer_cache: Rework to support internalized buffers

---
 src/video_core/renderer_opengl/gl_buffer_cache.h | 70 ++++++++++++++++++------
 1 file changed, 52 insertions(+), 18 deletions(-)

(limited to 'src/video_core/renderer_opengl/gl_buffer_cache.h')

diff --git a/src/video_core/renderer_opengl/gl_buffer_cache.h b/src/video_core/renderer_opengl/gl_buffer_cache.h
index 4a055035a..00bc6008a 100644
--- a/src/video_core/renderer_opengl/gl_buffer_cache.h
+++ b/src/video_core/renderer_opengl/gl_buffer_cache.h
@@ -5,9 +5,12 @@
 #pragma once
 
 #include <cstddef>
+#include <map>
 #include <memory>
 #include <tuple>
+#include <unordered_set>
 #include <utility>
+#include <vector>
 
 #include "common/common_types.h"
 #include "video_core/rasterizer_cache.h"
@@ -20,8 +23,7 @@ class RasterizerOpenGL;
 
 class CachedBufferEntry final : public RasterizerCacheObject {
 public:
-    explicit CachedBufferEntry(VAddr cpu_addr, u8* host_ptr, std::size_t size,
-                               std::size_t alignment, GLuint buffer, GLintptr offset);
+    explicit CachedBufferEntry(VAddr cpu_addr, u8* host_ptr);
 
     VAddr GetCpuAddr() const override {
         return cpu_addr;
@@ -35,55 +37,87 @@ public:
         return size;
     }
 
-    std::size_t GetAlignment() const {
-        return alignment;
+    std::size_t GetCapacity() const {
+        return capacity;
+    }
+
+    bool IsInternalized() const {
+        return is_internal;
     }
 
     GLuint GetBuffer() const {
-        return buffer;
+        return buffer.handle;
+    }
+
+    void SetSize(std::size_t new_size) {
+        size = new_size;
+    }
+
+    void SetInternalState(bool is_internal_) {
+        is_internal = is_internal_;
     }
 
-    GLintptr GetOffset() const {
-        return offset;
+    void SetCapacity(OGLBuffer&& new_buffer, std::size_t new_capacity) {
+        capacity = new_capacity;
+        buffer = std::move(new_buffer);
     }
 
 private:
     VAddr cpu_addr{};
     std::size_t size{};
-    std::size_t alignment{};
-
-    GLuint buffer{};
-    GLintptr offset{};
+    std::size_t capacity{};
+    bool is_internal{};
+    OGLBuffer buffer;
 };
 
 class OGLBufferCache final : public RasterizerCache<std::shared_ptr<CachedBufferEntry>> {
+    using BufferInfo = std::pair<GLuint, GLintptr>;
+
 public:
     explicit OGLBufferCache(RasterizerOpenGL& rasterizer, std::size_t size);
+    ~OGLBufferCache();
+
+    void Unregister(const std::shared_ptr<CachedBufferEntry>& entry) override;
 
     /// Uploads data from a guest GPU address. Returns the OpenGL buffer where it's located and its
     /// offset.
-    std::pair<GLuint, GLintptr> UploadMemory(GPUVAddr gpu_addr, std::size_t size,
-                                             std::size_t alignment = 4, bool cache = true);
+    BufferInfo UploadMemory(GPUVAddr gpu_addr, std::size_t size, std::size_t alignment = 4,
+                            bool internalize = false);
 
     /// Uploads from a host memory. Returns the OpenGL buffer where it's located and its offset.
-    std::pair<GLuint, GLintptr> UploadHostMemory(const void* raw_pointer, std::size_t size,
-                                                 std::size_t alignment = 4);
+    BufferInfo UploadHostMemory(const void* raw_pointer, std::size_t size,
+                                std::size_t alignment = 4);
 
     bool Map(std::size_t max_size);
     void Unmap();
 
 protected:
-    void AlignBuffer(std::size_t alignment);
-
     // We do not have to flush this cache as things in it are never modified by us.
     void FlushObjectInner(const std::shared_ptr<CachedBufferEntry>& object) override {}
 
 private:
-    OGLStreamBuffer stream_buffer;
+    BufferInfo StreamBufferUpload(const void* raw_pointer, std::size_t size, std::size_t alignment);
+
+    BufferInfo FixedBufferUpload(GPUVAddr gpu_addr, u8* host_ptr, std::size_t size,
+                                 bool internalize);
+
+    void GrowBuffer(std::shared_ptr<CachedBufferEntry>& entry, std::size_t new_size);
+
+    std::shared_ptr<CachedBufferEntry> GetUncachedBuffer(VAddr cpu_addr, u8* host_ptr);
+
+    std::shared_ptr<CachedBufferEntry> TryGetReservedBuffer(u8* host_ptr);
+
+    void ReserveBuffer(std::shared_ptr<CachedBufferEntry> entry);
+
+    void AlignBuffer(std::size_t alignment);
 
     u8* buffer_ptr = nullptr;
     GLintptr buffer_offset = 0;
     GLintptr buffer_offset_base = 0;
+
+    OGLStreamBuffer stream_buffer;
+    std::unordered_set<CacheAddr> internalized_entries;
+    std::unordered_map<CacheAddr, std::vector<std::shared_ptr<CachedBufferEntry>>> buffer_reserve;
 };
 
 } // namespace OpenGL
-- 
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