nullvideo: initial release of null video backend

Source/Core/VideoBackends/Null/VertexManager.cpp

@@ -0,0 +1,53 @@
+// Copyright 2015 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "VideoBackends/Null/VertexManager.h"
+#include "VideoBackends/Null/ShaderCache.h"
+
+#include "VideoCommon/IndexGenerator.h"
+#include "VideoCommon/Statistics.h"
+#include "VideoCommon/VertexLoaderManager.h"
+#include "VideoCommon/VideoConfig.h"
+
+namespace Null
+{
+class NullNativeVertexFormat : public NativeVertexFormat
+{
+public:
+  NullNativeVertexFormat() {}
+  void SetupVertexPointers() override {}
+};
+
+NativeVertexFormat*
+VertexManager::CreateNativeVertexFormat(const PortableVertexDeclaration& vtx_decl)
+{
+  return new NullNativeVertexFormat;
+}
+
+VertexManager::VertexManager() : m_local_v_buffer(MAXVBUFFERSIZE), m_local_i_buffer(MAXIBUFFERSIZE)
+{
+}
+
+VertexManager::~VertexManager()
+{
+}
+
+void VertexManager::ResetBuffer(u32 stride)
+{
+  s_pCurBufferPointer = s_pBaseBufferPointer = m_local_v_buffer.data();
+  s_pEndBufferPointer = s_pCurBufferPointer + m_local_v_buffer.size();
+  IndexGenerator::Start(&m_local_i_buffer[0]);
+}
+
+void VertexManager::vFlush(bool use_dst_alpha)
+{
+  VertexShaderCache::s_instance->SetShader(
+      use_dst_alpha ? DSTALPHA_DUAL_SOURCE_BLEND : DSTALPHA_NONE, current_primitive_type);
+  GeometryShaderCache::s_instance->SetShader(
+      use_dst_alpha ? DSTALPHA_DUAL_SOURCE_BLEND : DSTALPHA_NONE, current_primitive_type);
+  PixelShaderCache::s_instance->SetShader(
+      use_dst_alpha ? DSTALPHA_DUAL_SOURCE_BLEND : DSTALPHA_NONE, current_primitive_type);
+}
+
+}  // namespace