TextureUnit.cpp
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TextureUnit.cpp
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	#include <echo/Graphics/TextureUnit.h>

	namespace Echo
	{
	TextureUnit::TextureUnit()
	{
	mBlendMode.operation = LayerBlendOperationExs::MODULATE;
	mBlendMode.blendType = LayerBlendTypes::COLOUR;
	mBlendMode.source1 = LayerBlendSources::TEXTURE;
	mBlendMode.source2 = LayerBlendSources::CURRENT;
	mBlendMode.colour = Colour();

	mAlphaBlendMode.operation = LayerBlendOperationExs::MODULATE;
	mAlphaBlendMode.blendType = LayerBlendTypes::ALPHA;
	mAlphaBlendMode.source1 = LayerBlendSources::TEXTURE;
	mAlphaBlendMode.source2 = LayerBlendSources::CURRENT;
	mAlphaBlendMode.colour = Colour();

	mWrapModeU=TextureUnit::TextureWrapModes::REPEAT;
	mWrapModeV=TextureUnit::TextureWrapModes::REPEAT;
	mMinFilter=TextureUnit::TextureFilters::LINEAR;
	mMagFilter=TextureUnit::TextureFilters::LINEAR;
	mUScrollSpeed=0.0f;
	mVScrollSpeed=0.0;
	mUScaleSpeed=0;
	mVScaleSpeed=0;
	mUseTransformForStipAnimation=true;
	mRotationSpeed.SetZero();
	mTextureMatrix = Matrix4::IDENTITY;
	mTextureUnitSetToUse = 0;
	}

	TextureUnit::~TextureUnit()
	{
	}

	void TextureUnit::SetBlendMode(const BlendMode& val)
	{
	LayerBlendModeEx alphaBlend;
	alphaBlend.blendType = LayerBlendTypes::ALPHA;
	LayerBlendModeEx colourBlend;
	colourBlend.blendType = LayerBlendTypes::COLOUR;

	switch(val)
	{
	case BlendModes::NONE:
	colourBlend.operation=LayerBlendOperationExs::SOURCE1;
	alphaBlend.operation=LayerBlendOperationExs::SOURCE1;
	break;
	case BlendModes::TRANSPARENT:
	colourBlend.operation=LayerBlendOperationExs::BLEND_TEXTURE_ALPHA;
	alphaBlend.operation=LayerBlendOperationExs::BLEND_TEXTURE_ALPHA;
	break;
	case BlendModes::ADDITIVE:
	colourBlend.operation=LayerBlendOperationExs::ADD;
	alphaBlend.operation=LayerBlendOperationExs::ADD;
	break;
	case BlendModes::ADDITIVE_COLOUR:
	colourBlend.operation=LayerBlendOperationExs::ADD_SIGNED;
	alphaBlend.operation=LayerBlendOperationExs::ADD_SIGNED;
	break;
	case BlendModes::MODULATE:
	//This is actually the default for texture units.
	colourBlend.operation=LayerBlendOperationExs::MODULATE;
	alphaBlend.operation=LayerBlendOperationExs::MODULATE;
	break;
	case BlendModes::MODULATE_AND_BRIGHTEN:
	colourBlend.operation=LayerBlendOperationExs::MODULATE_X2;
	alphaBlend.operation=LayerBlendOperationExs::MODULATE_X2;
	break;
	case BlendModes::MODULATE_AND_BRIGHTEN_MORE:
	colourBlend.operation=LayerBlendOperationExs::MODULATE_X4;
	alphaBlend.operation=LayerBlendOperationExs::MODULATE_X4;
	break;
	case BlendModes::SUBTRACT:
	colourBlend.operation=LayerBlendOperationExs::SUBTRACT;
	alphaBlend.operation=LayerBlendOperationExs::SUBTRACT;
	break;
	default:
	//Should never be reached.
	break;
	}
	SetAlphaBlendMode(alphaBlend);
	SetBlendMode(colourBlend);
	}

	}

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