//========= Copyright © 1996-2002, Valve LLC, All rights reserved. ============
//
// Purpose: 
//
// $NoKeywords: $
//=============================================================================

#include "worldvertextransition_dx8_helper.h"
#include "BaseVSShader.h"

#include "WorldVertexTransition.inc"


// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"


void InitParamsWorldVertexTransitionEditor_DX8( IMaterialVar** params, WorldVertexTransitionEditor_DX8_Vars_t &info )
{
	SET_FLAGS2( MATERIAL_VAR2_LIGHTING_LIGHTMAP );
}

void InitWorldVertexTransitionEditor_DX8( CBaseVSShader *pShader, IMaterialVar** params, WorldVertexTransitionEditor_DX8_Vars_t &info )
{
	if ( params[info.m_nBaseTextureVar]->IsDefined() )
	{
		pShader->LoadTexture( info.m_nBaseTextureVar );
	}

	if ( params[info.m_nBaseTexture2Var]->IsDefined() )
	{
		pShader->LoadTexture( info.m_nBaseTexture2Var );
	}
}

void DrawWorldVertexTransitionEditor_DX8( CBaseVSShader *pShader, IMaterialVar** params, IShaderDynamicAPI *pShaderAPI, IShaderShadow* pShaderShadow, WorldVertexTransitionEditor_DX8_Vars_t &info )
{
	SHADOW_STATE
	{
		// This is the dx8 worldcraft version (non-bumped always.. too bad)
		pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
		pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );
		pShaderShadow->EnableTexture( SHADER_SAMPLER2, true );

		int fmt = VERTEX_POSITION | VERTEX_COLOR;
		pShaderShadow->VertexShaderVertexFormat( fmt, 2, 0, 0 );

		worldvertextransition_Static_Index vshIndex;
		pShaderShadow->SetVertexShader( "WorldVertexTransition", vshIndex.GetIndex() );
		pShaderShadow->SetPixelShader( "WorldVertexTransition_Editor" );
	
		pShader->FogToFogColor();
	}
	DYNAMIC_STATE
	{
		pShader->BindTexture( SHADER_SAMPLER0, TEXTURE_BINDFLAGS_NONE, info.m_nBaseTextureVar, info.m_nBaseTextureFrameVar );
		pShader->BindTexture( SHADER_SAMPLER1, TEXTURE_BINDFLAGS_NONE, info.m_nBaseTexture2Var, info.m_nBaseTexture2FrameVar );

		// Texture 3 = lightmap
		pShaderAPI->BindStandardTexture( SHADER_SAMPLER2, TEXTURE_BINDFLAGS_NONE, TEXTURE_LIGHTMAP );
		
		pShader->EnablePixelShaderOverbright( 0, true, true );
		
		// JasonM - Gnarly hack since we're calling this legacy shader from DX9
		int nTextureTransformConst  = VERTEX_SHADER_SHADER_SPECIFIC_CONST_0;
		int nTextureTransformConst2 = VERTEX_SHADER_SHADER_SPECIFIC_CONST_2;
		nTextureTransformConst  -= 10;
		nTextureTransformConst2 -= 10;

		pShader->SetVertexShaderTextureTransform( nTextureTransformConst,  info.m_nBaseTextureTransformVar  );
		pShader->SetVertexShaderTextureTransform( nTextureTransformConst2, info.m_nBaseTexture2TransformVar );

		worldvertextransition_Dynamic_Index vshIndex;
		vshIndex.SetDOWATERFOG( pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
		pShaderAPI->SetVertexShaderIndex( vshIndex.GetIndex() );
	}
	pShader->Draw();
}