anki-3d-engine/AnKi/Gr/BackendCommon/Functions.h

// Copyright (C) 2009-present, Panagiotis Christopoulos Charitos and contributors.
// All rights reserved.
// Code licensed under the BSD License.
// http://www.anki3d.org/LICENSE

#pragma once

#include <AnKi/Gr/BackendCommon/Common.h>
#include <AnKi/Math.h>

namespace anki {

inline Bool stencilTestDisabled(StencilOperation stencilFail, StencilOperation stencilPassDepthFail, StencilOperation stencilPassDepthPass,
								CompareOperation compare)
{
	return stencilFail == StencilOperation::kKeep && stencilPassDepthFail == StencilOperation::kKeep
		   && stencilPassDepthPass == StencilOperation::kKeep && compare == CompareOperation::kAlways;
}

inline Bool blendingDisabled(BlendFactor srcFactorRgb, BlendFactor dstFactorRgb, BlendFactor srcFactorA, BlendFactor dstFactorA, BlendOperation opRgb,
							 BlendOperation opA)
{
	Bool dontWantBlend = srcFactorRgb == BlendFactor::kOne && dstFactorRgb == BlendFactor::kZero && srcFactorA == BlendFactor::kOne
						 && dstFactorA == BlendFactor::kZero && (opRgb == BlendOperation::kAdd || opRgb == BlendOperation::kSubtract)
						 && (opA == BlendOperation::kAdd || opA == BlendOperation::kSubtract);
	return dontWantBlend;
}

/// Using an AnKi typename get the ShaderVariableDataType. Used for debugging.
template<typename T>
ShaderVariableDataType getShaderVariableTypeFromTypename();

#define ANKI_SVDT_MACRO(type, baseType, rowCount, columnCount, isIntagralType) \
	template<> \
	inline ShaderVariableDataType getShaderVariableTypeFromTypename<type>() \
	{ \
		return ShaderVariableDataType::k##type; \
	}

#include <AnKi/Gr/ShaderVariableDataType.def.h>
#undef ANKI_SVDT_MACRO

/// Populate the memory of a variable that is inside a shader block.
void writeShaderBlockMemory(ShaderVariableDataType type, const ShaderVariableBlockInfo& varBlkInfo, const void* elements, U32 elementsCount,
							void* buffBegin, const void* buffEnd);

} // end namespace anki