public void SetVertexArray(int VbIndex, int Stride, byte[] Buffer, GalVertexAttrib[] Attribs)
{
EnsureVbInitialized(VbIndex);
VertexBuffers[VbIndex].PrimCount = Buffer.Length / Stride;
VbInfo Vb = VertexBuffers[VbIndex];
IntPtr Length = new IntPtr(Buffer.Length);
GL.BindBuffer(BufferTarget.ArrayBuffer, Vb.VboHandle);
GL.BufferData(BufferTarget.ArrayBuffer, Length, Buffer, BufferUsageHint.StreamDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindVertexArray(Vb.VaoHandle);
for (int Attr = 0; Attr < 16; Attr++)
{
GL.DisableVertexAttribArray(Attr);
}
for (int Index = 0; Index < Attribs.Length; Index++)
{
GalVertexAttrib Attrib = Attribs[Index];
GL.EnableVertexAttribArray(Index);
GL.BindBuffer(BufferTarget.ArrayBuffer, Vb.VboHandle);
bool Unsigned =
Attrib.Type == GalVertexAttribType.Unorm ||
Attrib.Type == GalVertexAttribType.Uint ||
Attrib.Type == GalVertexAttribType.Uscaled;
bool Normalize =
Attrib.Type == GalVertexAttribType.Snorm ||
Attrib.Type == GalVertexAttribType.Unorm;
VertexAttribPointerType Type = 0;
if (Attrib.Type == GalVertexAttribType.Float)
{
Type = VertexAttribPointerType.Float;
}
else
{
Type = AttribTypes[Attrib.Size] + (Unsigned ? 1 : 0);
}
int Size = AttribElements[Attrib.Size];
int Offset = Attrib.Offset;
GL.VertexAttribPointer(Index, Size, Type, Normalize, Stride, Offset);
}
GL.BindVertexArray(0);
}
public void DrawElements(int VbIndex, int First, GalPrimitiveType PrimType)
{
VbInfo Vb = VertexBuffers[VbIndex];
PrimitiveType Mode = OGLEnumConverter.GetPrimitiveType(PrimType);
GL.BindVertexArray(Vb.VaoHandle);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, IndexBuffer.IboHandle);
GL.DrawElements(Mode, IndexBuffer.Count, IndexBuffer.Type, First);
}
public void DrawArrays(int VbIndex, int First, int PrimCount, GalPrimitiveType PrimType)
{
if (PrimCount == 0)
{
return;
}
VbInfo Vb = VertexBuffers[VbIndex];
GL.BindVertexArray(Vb.VaoHandle);
GL.DrawArrays(OGLEnumConverter.GetPrimitiveType(PrimType), First, PrimCount);
}
private void EnsureVbInitialized(int VbIndex)
{
VbInfo Vb = VertexBuffers[VbIndex];
if (Vb.VaoHandle == 0)
{
Vb.VaoHandle = GL.GenVertexArray();
}
if (Vb.VboHandle == 0)
{
Vb.VboHandle = GL.GenBuffer();
}
VertexBuffers[VbIndex] = Vb;
}
