vertex buffer: added some accessors to inspect a VertexDeclaration/Stream/Buffer

src/gpu/vertexbuffer.cpp

@@ -598,6 +598,46 @@ void VertexDeclaration::AddStream(VertexStreamBase const &s)
     }
 }
 
+int VertexDeclaration::GetStreamCount() const
+{
+	return m_count ? m_streams[m_count - 1].index + 1 : 0;
+}
+
+VertexStreamBase VertexDeclaration::GetStream(int index) const
+{
+	VertexStreamBase stream;
+	int n = 0;
+
+	for (int i = 0; i < m_count; ++i)
+	{
+		if (m_streams[i].index != index)
+			continue;
+
+		switch (m_streams[i].stream_type)
+		{
+#define LOL_TYPE(T) \
+			case VertexStreamBase::Type##T: stream.AddStream<T>(n++, m_streams[i].usage); break;
+
+			LOL_TYPE(void)
+			LOL_TYPE(half)     LOL_TYPE(f16vec2) LOL_TYPE(f16vec3) LOL_TYPE(f16vec4)
+			LOL_TYPE(float)    LOL_TYPE(vec2)    LOL_TYPE(vec3)    LOL_TYPE(vec4)
+			LOL_TYPE(double)   LOL_TYPE(dvec2)   LOL_TYPE(dvec3)   LOL_TYPE(dvec4)
+			LOL_TYPE(int8_t)   LOL_TYPE(i8vec2)  LOL_TYPE(i8vec3)  LOL_TYPE(i8vec4)
+			LOL_TYPE(uint8_t)  LOL_TYPE(u8vec2)  LOL_TYPE(u8vec3)  LOL_TYPE(u8vec4)
+			LOL_TYPE(int16_t)  LOL_TYPE(i16vec2) LOL_TYPE(i16vec3) LOL_TYPE(i16vec4)
+			LOL_TYPE(uint16_t) LOL_TYPE(u16vec2) LOL_TYPE(u16vec3) LOL_TYPE(u16vec4)
+			LOL_TYPE(int32_t)  LOL_TYPE(ivec2)   LOL_TYPE(ivec3)   LOL_TYPE(ivec4)
+			LOL_TYPE(uint32_t) LOL_TYPE(uvec2)   LOL_TYPE(uvec3)   LOL_TYPE(uvec4)
+#undef LOL_TYPE
+		}
+	}
+
+	for (int i = m_count; i < 12; ++i)
+		stream.AddStream<void>(i, VertexStreamBase::Typevoid);
+
+	return stream;
+}
+
 //
 // The VertexBuffer class
 // ----------------------
@@ -634,6 +674,11 @@ VertexBuffer::~VertexBuffer()
     delete m_data;
 }
 
+size_t VertexBuffer::GetSize()
+{
+	return m_data->m_size;
+}
+
 void *VertexBuffer::Lock(size_t offset, size_t size)
 {
     if (!m_data->m_size)

src/lol/gpu/vertexbuffer.h

@@ -29,6 +29,8 @@ public:
     VertexBuffer(size_t size);
     ~VertexBuffer();
 
+	size_t GetSize();
+
     void *Lock(size_t offset, size_t size);
     void Unlock();
 
@@ -142,7 +144,7 @@ class VertexStreamBase
 {
     friend class VertexDeclaration;
 
-protected:
+public:
     enum
     {
         Typevoid = 0,
@@ -157,6 +159,38 @@ protected:
         Typeuint32_t, Typeuvec2,   Typeuvec3,   Typeuvec4,
     };
 
+	int GetSize() const
+	{
+		int size = 0, i = 0;
+		while (m_streams[i].size)
+			size += m_streams[i++].size;
+		return size;
+	}
+
+	int GetStreamCount() const
+	{
+		int i = 0;
+		while (m_streams[i].size) ++i;
+		return i;
+	}
+
+	VertexUsage GetUsage(int index) const
+	{
+		return m_streams[index].usage;
+	}
+
+	uint8_t GetType(int index) const
+	{
+		return m_streams[index].stream_type;
+	}
+
+	uint8_t GetSize(int index) const
+	{
+		return m_streams[index].size;
+	}
+
+protected:
+
 #define LOL_TYPE(T) \
     static uint8_t GetType(T *x) { UNUSED(x); return Type##T; }
 
@@ -266,6 +300,10 @@ public:
                                      ShaderAttrib attr11 = ShaderAttrib(),
                                      ShaderAttrib attr12 = ShaderAttrib());
 
+	int GetStreamCount() const;
+
+	VertexStreamBase GetStream(int index) const;
+
 private:
     void Initialize();
     void AddStream(VertexStreamBase const &);