/// <summary>
/// Because depthStencilState is optional
/// </summary>
/// <param name="depthStencilState">Depth stencil state.</param>
void PopulateDepthStencilState(MgPipelineDepthStencilStateCreateInfo depthStencilState)
{
GLGraphicsPipelineFlagBits flags = 0;
// VULKAN DOC : The scissor test is always performed.
// Applications can effectively disable the scissor test by specifying a
// scissor rectangle that encompasses the entire framebuffer.
flags |= GLGraphicsPipelineFlagBits.ScissorTestEnabled;
if (depthStencilState != null)
{
flags |= (depthStencilState.DepthTestEnable) ? GLGraphicsPipelineFlagBits.DepthBufferEnabled : 0;
flags |= (depthStencilState.StencilTestEnable) ? GLGraphicsPipelineFlagBits.StencilEnabled : 0;
flags |= (depthStencilState.DepthWriteEnable) ? GLGraphicsPipelineFlagBits.DepthBufferWriteEnabled : 0;
flags |= GLGraphicsPipelineFlagBits.TwoSidedStencilMode;
// SAME STENCIL MODE USED FOR FRONT AND BACK
Front = new GLGraphicsPipelineStencilMasks {
CompareMask = depthStencilState.Front.CompareMask,
WriteMask = depthStencilState.Front.WriteMask,
Reference = (int)depthStencilState.Front.Reference,
};
Back = new GLGraphicsPipelineStencilMasks
{
CompareMask = depthStencilState.Back.CompareMask,
WriteMask = depthStencilState.Back.WriteMask,
Reference = (int)depthStencilState.Back.Reference,
};
StencilState = new GLGraphicsPipelineStencilState {
FrontStencilFunction = depthStencilState.Front.CompareOp,
FrontStencilPass = depthStencilState.Front.PassOp,
FrontStencilFail = depthStencilState.Front.FailOp,
FrontDepthBufferFail = depthStencilState.Front.DepthFailOp,
BackStencilPass = depthStencilState.Back.PassOp,
BackStencilFail = depthStencilState.Back.FailOp,
BackDepthBufferFail = depthStencilState.Back.DepthFailOp,
BackStencilFunction = depthStencilState.Back.CompareOp,
};
DepthState = new GLGraphicsPipelineDepthState {
DepthBufferFunction = depthStencilState.DepthCompareOp,
};
MaxDepthBounds = depthStencilState.MaxDepthBounds;
MinDepthBounds = depthStencilState.MinDepthBounds;
}
else
{
flags |= GLGraphicsPipelineFlagBits.DepthBufferEnabled;
flags |= GLGraphicsPipelineFlagBits.DepthBufferWriteEnabled;
// Based on OpenGL defaults
//flags |= (depthStencilState.StencilTestEnable) ? QueueDrawItemBitFlags.StencilEnabled : 0;
//flags |= QueueDrawItemBitFlags.TwoSidedStencilMode;
// DisableStencilBuffer ();
// SetStencilWriteMask (~0);
// SetStencilFunction (MgCompareOp.ALWAYS, ~0, int.MaxValue);
// SetStencilOperation (MgStencilOp.KEEP, MgStencilOp.KEEP, MgStencilOp.KEEP);
//
// void SetStencilFunction(
// MgCompareOp stencilFunction,
// int referenceStencil,
// int stencilMask);
// void SetStencilOperation(
// MgStencilOp stencilFail,
// MgStencilOp stencilDepthBufferFail,
// MgStencilOp stencilPass);
// SAME STENCIL MODE USED FOR FRONT AND BACK
Front = new GLGraphicsPipelineStencilMasks
{
CompareMask = int.MaxValue,
WriteMask = ~0U,
Reference = ~0,
};
Back = new GLGraphicsPipelineStencilMasks
{
CompareMask = int.MaxValue,
WriteMask = ~0U,
Reference = ~0,
};
StencilState = new GLGraphicsPipelineStencilState {
FrontStencilFunction = MgCompareOp.ALWAYS,
FrontStencilPass = MgStencilOp.KEEP,
FrontStencilFail = MgStencilOp.KEEP,
FrontDepthBufferFail = MgStencilOp.KEEP,
BackStencilFunction = MgCompareOp.ALWAYS,
BackStencilPass = MgStencilOp.KEEP,
BackStencilFail = MgStencilOp.KEEP,
BackDepthBufferFail = MgStencilOp.KEEP,
};
DepthState = new GLGraphicsPipelineDepthState {
DepthBufferFunction = MgCompareOp.LESS,
};
MinDepthBounds = 0f;
MaxDepthBounds = 1f;
}
Flags |= flags;
}
void InitiailizeDepthStateDescriptor(MgPipelineDepthStencilStateCreateInfo depthStencil)
{
if (depthStencil != null)
{
// VULKAN : If there is no depth framebuffer attachment, it is as if the depth test always passes.
if (!depthStencil.DepthTestEnable)
{
DepthCompareFunction = MgCompareOp.ALWAYS;
}
else
{
DepthCompareFunction = depthStencil.DepthCompareOp;
}
DepthWriteEnabled = depthStencil.DepthWriteEnable;
{
var localState = depthStencil.Back;
BackStencil = new AmtGraphicsPipelineStencilInfo
{
WriteMask = localState.WriteMask,
ReadMask = localState.CompareMask,
StencilCompareFunction = localState.CompareOp,
DepthFailure = localState.DepthFailOp,
DepthStencilPass = localState.PassOp,
StencilFailure = localState.FailOp,
};
BackStencilReference = localState.Reference;
}
{
var localState = depthStencil.Front;
BackStencil = new AmtGraphicsPipelineStencilInfo
{
WriteMask = localState.WriteMask,
ReadMask = localState.CompareMask,
StencilCompareFunction = localState.CompareOp,
DepthFailure = localState.DepthFailOp,
DepthStencilPass = localState.PassOp,
StencilFailure = localState.FailOp,
};
FrontStencilReference = localState.Reference;
}
}
else
{
// VULKAN : If there is no depth framebuffer attachment, it is as if the depth test always passes.
DepthCompareFunction = MgCompareOp.ALWAYS;
DepthWriteEnabled = true;
// USE OPENGL DEFAULTS
BackStencil = new AmtGraphicsPipelineStencilInfo
{
WriteMask = ~0U,
ReadMask = int.MaxValue,
StencilCompareFunction = MgCompareOp.ALWAYS,
DepthFailure = MgStencilOp.KEEP,
DepthStencilPass = MgStencilOp.KEEP,
StencilFailure = MgStencilOp.KEEP,
};
BackStencilReference = ~0U;
FrontStencil = new AmtGraphicsPipelineStencilInfo
{
WriteMask = ~0U,
ReadMask = int.MaxValue,
StencilCompareFunction = MgCompareOp.ALWAYS,
DepthFailure = MgStencilOp.KEEP,
DepthStencilPass = MgStencilOp.KEEP,
StencilFailure = MgStencilOp.KEEP,
};
FrontStencilReference = ~0U;
}
}
