/*
===========================================================================

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  

Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#pragma hdrstop
#include "../idlib/precompiled.h"

#include "DeviceContext.h"
#include "Window.h"
#include "UserInterfaceLocal.h"
#include "RenderWindow.h"

// NO LONGER SUPPORTED!
//
// D3 could render a 3D model in a subrect of a full screen
// GUI for the main menus, but we have cut that ability so
// we don't need to deal with offset viewports on all platforms.

idRenderWindow::idRenderWindow(idUserInterfaceLocal *g) : idWindow(g) {
	gui = g;
	CommonInit();
}

idRenderWindow::~idRenderWindow() {
	renderSystem->FreeRenderWorld( world ); 
}

void idRenderWindow::CommonInit() {
	world = renderSystem->AllocRenderWorld();
	needsRender = true;
	lightOrigin = idVec4(-128.0f, 0.0f, 0.0f, 1.0f);
	lightColor = idVec4(1.0f, 1.0f, 1.0f, 1.0f);
	modelOrigin.Zero();
	viewOffset = idVec4(-128.0f, 0.0f, 0.0f, 1.0f);
	modelAnim = NULL;
	animLength = 0;
	animEndTime = -1;
	modelDef = -1;
	updateAnimation = true;
}


void idRenderWindow::BuildAnimation(int time) {
	
	if (!updateAnimation) {
		return;
	}

	if (animName.Length() && animClass.Length()) {
		worldEntity.numJoints = worldEntity.hModel->NumJoints();
		worldEntity.joints = ( idJointMat * )Mem_Alloc16( SIMD_ROUND_JOINTS( worldEntity.numJoints ) * sizeof( *worldEntity.joints ), TAG_JOINTMAT );
		modelAnim = gameEdit->ANIM_GetAnimFromEntityDef( animClass, animName );
		if ( modelAnim ) {
			animLength = gameEdit->ANIM_GetLength( modelAnim );
			animEndTime = time + animLength;
		}
	}
	updateAnimation = false;

}

void idRenderWindow::PreRender() {
	if (needsRender) {
		world->InitFromMap( NULL );
		idDict spawnArgs;
		spawnArgs.Set("classname", "light");
		spawnArgs.Set("name", "light_1");
		spawnArgs.Set("origin", lightOrigin.ToVec3().ToString());
		spawnArgs.Set("_color", lightColor.ToVec3().ToString());
		gameEdit->ParseSpawnArgsToRenderLight( &spawnArgs, &rLight );
		lightDef = world->AddLightDef( &rLight );
		if ( !modelName[0] ) {
			common->Warning( "Window '%s' in gui '%s': no model set", GetName(), GetGui()->GetSourceFile() );
		}
		memset( &worldEntity, 0, sizeof( worldEntity ) );
		spawnArgs.Clear();
		spawnArgs.Set("classname", "func_static");
		spawnArgs.Set("model", modelName);
		spawnArgs.Set("origin", modelOrigin.c_str());
		gameEdit->ParseSpawnArgsToRenderEntity( &spawnArgs, &worldEntity );
		if ( worldEntity.hModel ) {
			idVec3 v = modelRotate.ToVec3();
			worldEntity.axis = v.ToMat3();
			worldEntity.shaderParms[0] = 1;
			worldEntity.shaderParms[1] = 1;
			worldEntity.shaderParms[2] = 1;
			worldEntity.shaderParms[3] = 1;
			modelDef = world->AddEntityDef( &worldEntity );
		}
		needsRender = false;
	}
}

void idRenderWindow::Render( int time ) {
	rLight.origin = lightOrigin.ToVec3();
	rLight.shaderParms[SHADERPARM_RED] = lightColor.x();
	rLight.shaderParms[SHADERPARM_GREEN] = lightColor.y();
	rLight.shaderParms[SHADERPARM_BLUE] = lightColor.z();
	world->UpdateLightDef(lightDef, &rLight);
	if ( worldEntity.hModel ) {
		if (updateAnimation) {
			BuildAnimation(time);
		}
		if (modelAnim) {
			if (time > animEndTime) {
				animEndTime = time + animLength;
			}
			gameEdit->ANIM_CreateAnimFrame(worldEntity.hModel, modelAnim, worldEntity.numJoints, worldEntity.joints, animLength - (animEndTime - time), vec3_origin, false );
		}
		worldEntity.axis = idAngles(modelRotate.x(), modelRotate.y(), modelRotate.z()).ToMat3();
		world->UpdateEntityDef(modelDef, &worldEntity);
	}
}




void idRenderWindow::Draw(int time, float x, float y) {
	PreRender();
	Render(time);

	memset( &refdef, 0, sizeof( refdef ) );
	refdef.vieworg = viewOffset.ToVec3();;
	//refdef.vieworg.Set(-128, 0, 0);

	refdef.viewaxis.Identity();
	refdef.shaderParms[0] = 1;
	refdef.shaderParms[1] = 1;
	refdef.shaderParms[2] = 1;
	refdef.shaderParms[3] = 1;

	refdef.fov_x = 90;
	refdef.fov_y = 2 * atan((float)drawRect.h / drawRect.w) * idMath::M_RAD2DEG;

	refdef.time[0] = time;
	refdef.time[1] = time;
	world->RenderScene(&refdef);
}

void idRenderWindow::PostParse() {
	idWindow::PostParse();
}

// 
//  
idWinVar *idRenderWindow::GetWinVarByName(const char *_name, bool fixup, drawWin_t** owner ) {
// 
	if (idStr::Icmp(_name, "model") == 0) {
		return &modelName;
	}
	if (idStr::Icmp(_name, "anim") == 0) {
		return &animName;
	}
	if (idStr::Icmp(_name, "lightOrigin") == 0) {
		return &lightOrigin;
	}
	if (idStr::Icmp(_name, "lightColor") == 0) {
		return &lightColor;
	}
	if (idStr::Icmp(_name, "modelOrigin") == 0) {
		return &modelOrigin;
	}
	if (idStr::Icmp(_name, "modelRotate") == 0) {
		return &modelRotate;
	}
	if (idStr::Icmp(_name, "viewOffset") == 0) {
		return &viewOffset;
	}
	if (idStr::Icmp(_name, "needsRender") == 0) {
		return &needsRender;
	}

// 
//  
	return idWindow::GetWinVarByName(_name, fixup, owner);
// 
}

bool idRenderWindow::ParseInternalVar(const char *_name, idTokenParser *src) {
	if (idStr::Icmp(_name, "animClass") == 0) {
		ParseString(src, animClass);
		return true;
	}
	return idWindow::ParseInternalVar(_name, src);
}