nullvideo: initial release of null video backend

Source/Core/VideoBackends/Null/TextureCache.h

@@ -0,0 +1,60 @@
+// Copyright 2015 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "VideoCommon/TextureCacheBase.h"
+
+namespace Null
+{
+class TextureCache : public TextureCacheBase
+{
+public:
+  TextureCache() {}
+  ~TextureCache() {}
+  void CompileShaders() override {}
+  void DeleteShaders() override {}
+  void ConvertTexture(TCacheEntryBase* entry, TCacheEntryBase* unconverted, void* palette,
+                      TlutFormat format) override
+  {
+  }
+
+  void CopyEFB(u8* dst, u32 format, u32 native_width, u32 bytes_per_row, u32 num_blocks_y,
+               u32 memory_stride, PEControl::PixelFormat src_format, const EFBRectangle& src_rect,
+               bool is_intensity, bool scale_by_half) override
+  {
+  }
+
+private:
+  struct TCacheEntry : TCacheEntryBase
+  {
+    TCacheEntry(const TCacheEntryConfig& _config) : TCacheEntryBase(_config) {}
+    ~TCacheEntry() {}
+    void Load(unsigned int width, unsigned int height, unsigned int expanded_width,
+              unsigned int level) override
+    {
+    }
+
+    void FromRenderTarget(u8* dst, PEControl::PixelFormat src_format, const EFBRectangle& src_rect,
+                          bool scale_by_half, unsigned int cbufid, const float* colmat) override
+    {
+    }
+
+    void CopyRectangleFromTexture(const TCacheEntryBase* source,
+                                  const MathUtil::Rectangle<int>& srcrect,
+                                  const MathUtil::Rectangle<int>& dstrect) override
+    {
+    }
+
+    void Bind(unsigned int stage) override {}
+    bool Save(const std::string& filename, unsigned int level) override { return false; }
+  };
+
+  TCacheEntryBase* CreateTexture(const TCacheEntryConfig& config) override
+  {
+    return new TCacheEntry(config);
+  }
+};
+
+}  // Null name space