From 5218c59ab733f4f721a97fa56a4eef80fabf0618 Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Fri, 13 Apr 2012 16:34:22 +0000
Subject: [PATCH] gpu: start working on a template-based vertex buffer class.

---
 src/Makefile.am               |  1 +
 src/core.h                    |  1 +
 src/gpu/vertexbuffer.cpp      | 31 +++++++++++
 src/gpu/vertexbuffer.h        | 98 +++++++++++++++++++++++++++++++++++
 test/tutorial/tut01.cpp       | 16 ++++++
 win32/lolcore.vcxproj         |  2 +
 win32/lolcore.vcxproj.filters |  6 +++
 7 files changed, 155 insertions(+)
 create mode 100644 src/gpu/vertexbuffer.cpp
 create mode 100644 src/gpu/vertexbuffer.h

diff --git a/src/Makefile.am b/src/Makefile.am
index 7db0c214..8113f3b0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -30,6 +30,7 @@ liblol_a_SOURCES = \
     \
     gpu/shader.cpp gpu/shader.h \
     gpu/vbo.cpp gpu/vbo.h \
+    gpu/vertexbuffer.cpp gpu/vertexbuffer.h \
     \
     image/image.cpp image/image.h image/image-private.h \
     image/codec/gdiplus-image.cpp \
diff --git a/src/core.h b/src/core.h
index d0f6a26d..f4848f94 100644
--- a/src/core.h
+++ b/src/core.h
@@ -99,6 +99,7 @@ static inline int isnan(float f)
 #include "layer.h"
 #include "gpu/shader.h"
 #include "gpu/vbo.h"
+#include "gpu/vertexbuffer.h"
 #include "image/image.h"
 #include "application/application.h"
 
diff --git a/src/gpu/vertexbuffer.cpp b/src/gpu/vertexbuffer.cpp
new file mode 100644
index 00000000..8a8156ab
--- /dev/null
+++ b/src/gpu/vertexbuffer.cpp
@@ -0,0 +1,31 @@
+//
+// Lol Engine
+//
+// Copyright: (c) 2010-2012 Sam Hocevar <sam@hocevar.net>
+//   This program is free software; you can redistribute it and/or
+//   modify it under the terms of the Do What The Fuck You Want To
+//   Public License, Version 2, as published by Sam Hocevar. See
+//   http://sam.zoy.org/projects/COPYING.WTFPL for more details.
+//
+
+#if defined HAVE_CONFIG_H
+#   include "config.h"
+#endif
+
+#include "core.h"
+#include "lolgl.h"
+
+using namespace std;
+
+namespace lol
+{
+
+void VertexBuffer::Initialize()
+{
+#if defined _XBOX || defined USE_D3D9
+    
+#endif    
+}
+
+} /* namespace lol */
+
diff --git a/src/gpu/vertexbuffer.h b/src/gpu/vertexbuffer.h
new file mode 100644
index 00000000..ba954407
--- /dev/null
+++ b/src/gpu/vertexbuffer.h
@@ -0,0 +1,98 @@
+//
+// Lol Engine
+//
+// Copyright: (c) 2010-2012 Sam Hocevar <sam@hocevar.net>
+//   This program is free software; you can redistribute it and/or
+//   modify it under the terms of the Do What The Fuck You Want To
+//   Public License, Version 2, as published by Sam Hocevar. See
+//   http://sam.zoy.org/projects/COPYING.WTFPL for more details.
+//
+
+//
+// The GpuVbo class
+// ----------------
+//
+
+#if !defined __LOL_VERTEXBUFFER_H__
+#define __LOL_VERTEXBUFFER_H__
+
+namespace lol
+{
+
+class VertexBuffer
+{
+public:
+    VertexBuffer(VertexBuffer const& that)
+    {
+        memcpy(this, &that, sizeof(*this));
+
+        /* Now call the platform-specific initialisation code */
+        Initialize();
+    }
+
+    ~VertexBuffer() {}
+
+protected:
+    VertexBuffer() {}
+
+    enum StreamType
+    {
+        VBO_TYPE_VOID,
+        VBO_TYPE_FLOAT,
+        VBO_TYPE_VEC2,
+        VBO_TYPE_VEC3,
+        VBO_TYPE_VEC4,
+        VBO_TYPE_I16VEC4,
+        VBO_TYPE_U8VEC4,
+    };
+
+    template<typename T> static StreamType GetType();
+
+    struct { StreamType stream_type; int index; } m_streams[12 + 1];
+
+private:
+    void Initialize();
+};
+
+template<> VertexBuffer::StreamType VertexBuffer::GetType<void>() { return VBO_TYPE_VOID; }
+template<> VertexBuffer::StreamType VertexBuffer::GetType<float>() { return VBO_TYPE_FLOAT; }
+template<> VertexBuffer::StreamType VertexBuffer::GetType<vec2>() { return VBO_TYPE_VEC2; }
+template<> VertexBuffer::StreamType VertexBuffer::GetType<vec3>() { return VBO_TYPE_VEC3; }
+template<> VertexBuffer::StreamType VertexBuffer::GetType<vec4>() { return VBO_TYPE_VEC4; }
+template<> VertexBuffer::StreamType VertexBuffer::GetType<i16vec4>() { return VBO_TYPE_I16VEC4; }
+template<> VertexBuffer::StreamType VertexBuffer::GetType<u8vec4>() { return VBO_TYPE_U8VEC4; }
+
+template<typename T1 = void,  typename T2 = void,  typename T3 = void,
+         typename T4 = void,  typename T5 = void,  typename T6 = void,
+         typename T7 = void,  typename T8 = void,  typename T9 = void,
+         typename T10 = void, typename T11 = void, typename T12 = void>
+class VertexDeclaration : public VertexBuffer
+{
+public:
+    /* Arguments are the stream index; default to zero */
+    VertexDeclaration(int s1 = 0,  int s2 = 0,  int s3 = 0,
+                      int s4 = 0,  int s5 = 0,  int s6 = 0,
+                      int s7 = 0,  int s8 = 0,  int s9 = 0,
+                      int s10 = 0, int s11 = 0, int s12 = 0)
+    {
+        for (int i = 0; i < 12 + 1; i++)
+            m_streams[i].stream_type = VBO_TYPE_VOID;
+
+        AddStream<T1>(0, s1); AddStream<T2>(1, s2); AddStream<T3>(2, s3);
+        AddStream<T4>(3, s4); AddStream<T5>(4, s5); AddStream<T6>(5, s6);
+        AddStream<T7>(6, s7); AddStream<T8>(7, s8); AddStream<T9>(8, s9);
+        AddStream<T10>(9, s10); AddStream<T11>(10, s11); AddStream<T12>(11, s12);
+    }
+
+private:
+    template<typename T> void AddStream(int index, int stream)
+    {
+        m_streams[index].stream_type = GetType<T>();
+        m_streams[index].index = index;
+    }
+};
+
+} /* namespace lol */
+
+#endif // __LOL_VERTEXBUFFER_H__
+
diff --git a/test/tutorial/tut01.cpp b/test/tutorial/tut01.cpp
index 0158ed8a..4ee38278 100644
--- a/test/tutorial/tut01.cpp
+++ b/test/tutorial/tut01.cpp
@@ -61,6 +61,22 @@ public:
 
         if (!m_ready)
         {
+            VertexBuffer vb(VertexDeclaration<vec2, float, ivec3>(0, 0, 1));
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
             m_shader = Shader::Create(
 #if !defined __CELLOS_LV2__ && !defined _XBOX && !defined USE_D3D9
                 "#version 120\n"
diff --git a/win32/lolcore.vcxproj b/win32/lolcore.vcxproj
index 36cf7b77..e4529a3a 100644
--- a/win32/lolcore.vcxproj
+++ b/win32/lolcore.vcxproj
@@ -87,6 +87,7 @@
     <ClCompile Include="..\src\forge.cpp" />
     <ClCompile Include="..\src\gpu\shader.cpp" />
     <ClCompile Include="..\src\gpu\vbo.cpp" />
+    <ClCompile Include="..\src\gpu\vertexbuffer.cpp" />
     <ClCompile Include="..\src\gradient.cpp" />
     <ClCompile Include="..\src\hash.cpp" />
     <ClCompile Include="..\src\image\codec\android-image.cpp" />
@@ -140,6 +141,7 @@
     <ClInclude Include="..\src\forge.h" />
     <ClInclude Include="..\src\gpu\shader.h" />
     <ClInclude Include="..\src\gpu\vbo.h" />
+    <ClInclude Include="..\src\gpu\vertexbuffer.h" />
     <ClInclude Include="..\src\gradient.h" />
     <ClInclude Include="..\src\hash.h" />
     <ClInclude Include="..\src\image\image-private.h" />
diff --git a/win32/lolcore.vcxproj.filters b/win32/lolcore.vcxproj.filters
index 0ff6e8ef..8292dc7b 100644
--- a/win32/lolcore.vcxproj.filters
+++ b/win32/lolcore.vcxproj.filters
@@ -166,6 +166,9 @@
     <ClCompile Include="..\src\gpu\vbo.cpp">
       <Filter>src\gpu</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\gpu\vertexbuffer.cpp">
+      <Filter>src\gpu</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\application\application.cpp">
       <Filter>src\application</Filter>
     </ClCompile>
@@ -339,6 +342,9 @@
     <ClInclude Include="..\src\gpu\vbo.h">
       <Filter>src\gpu</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\gpu\vertexbuffer.h">
+      <Filter>src\gpu</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\thread\thread.h">
       <Filter>src\thread</Filter>
     </ClInclude>