1 files changed, 85 insertions, 0 deletions
diff --git a/source/GraphicsTags.hpp b/source/GraphicsTags.hpp
new file mode 100644
index 0000000..465c57d
--- /dev/null
+++ b/source/GraphicsTags.hpp
@@ -0,0 +1,85 @@
+#pragma once
+
+#include <glad/glad.h>
+#include <string>
+#include <string_view>
+
+namespace Tags {
+/// Vertex element semantics, used to identify the meaning of vertex buffer contents
+enum VertexElementSemantic {
+	/// Position, typically VET_Float3
+	VES_Position,
+	/// Blending weights
+	VES_BlendWeights,
+	/// Blending indices
+	VES_BlendIndices,
+	/// Normal, typically VET_Float3
+	VES_Normal,
+	/// Colour, typically VET_Ubyte4
+	VES_Color1,
+	/// Secondary colour. Generally free for custom data. Means specular with OpenGL FFP.
+	VES_Color2,
+	/// Texture coordinates, typically VET_Float2
+	VES_Texture_coordinates,
+	/// Binormal (Y axis if normal is Z)
+	VES_Binormal,
+	/// Tangent (X axis if normal is Z)
+	VES_Tangent,
+	/// Default semantic
+	VES_Generic,
+	VES_COUNT,
+};
+
+std::string_view NameOf(VertexElementSemantic semantic);
+VertexElementSemantic FindVertexElementSemantic(std::string_view name);
+
+enum VertexElementType {
+	VET_Float1,
+	VET_Float2,
+	VET_Float3,
+	VET_Float4,
+
+	VET_Short2,
+	VET_Short4,
+	VET_Ubyte4,
+
+	// the following are not universally supported on all hardware:
+	VET_Double1,
+	VET_Double2,
+	VET_Double3,
+	VET_Double4,
+	VET_Ushort2,
+	VET_Ushort4,
+	VET_Int1,
+	VET_Int2,
+	VET_Int3,
+	VET_Int4,
+	VET_Uint1,
+	VET_Uint2,
+	VET_Uint3,
+	VET_Uint4,
+	VET_Byte4, /// signed bytes
+
+	VET_NORM_BEGIN,
+	VET_Byte4Norm = VET_NORM_BEGIN, /// signed bytes (normalized to -1..1)
+	VET_Ubyte4Norm, /// unsigned bytes (normalized to 0..1)
+	VET_Short2Norm, /// signed shorts (normalized to -1..1)
+	VET_Short4Norm,
+	VET_Ushort2Norm, /// unsigned shorts (normalized to 0..1)
+	VET_Ushort4Norm,
+	VET_NORM_END = VET_Ushort4Norm,
+};
+
+int SizeOf(VertexElementType type);
+bool IsNormalized(VertexElementType type);
+
+enum IndexType {
+	IT_16Bit,
+	IT_32Bit,
+};
+
+int SizeOf(IndexType type);
+
+std::string_view NameOfGLType(GLenum);
+GLenum FindGLType(std::string_view name);
+} // namespace Tags