private MappedResource MapTexture(Texture texture, bool adjustOffsetForSubresource, BufferTarget bufferTarget, int pixelBufferObjectId, int subResourceIndex, MapMode mapMode, int offsetInBytes, int lengthInBytes)
{
int mipLevel = subResourceIndex % texture.MipLevels;
GL.BindBuffer(bufferTarget, pixelBufferObjectId);
var mapResult = GL.MapBufferRange(bufferTarget, (IntPtr)offsetInBytes + (adjustOffsetForSubresource ? texture.ComputeBufferOffset(subResourceIndex, 0) : 0), (IntPtr)lengthInBytes, mapMode.ToOpenGLMask());
GL.BindBuffer(bufferTarget, 0);
return new MappedResource(texture, subResourceIndex, new DataBox { DataPointer = mapResult, SlicePitch = texture.ComputeSlicePitch(mipLevel), RowPitch = texture.ComputeRowPitch(mipLevel) }, offsetInBytes, lengthInBytes)
{
PixelBufferObjectId = pixelBufferObjectId,
};
}