/*
   Copyright (C) 2002 Dominic Clifton.

   This file is part of GtkRadiant.

   GtkRadiant 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 2 of the License, or
   (at your option) any later version.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

//
// Sprite Model Plugin
//
// Code by Hydra aka Dominic Clifton
//
// Based on MD3Model source code by SPoG
//

/*
    Overview
    ========


    Why ?
    -----

    It allows the user to see a graphical representation of the entity in the 3D view (maybe 2D views later) where the entity would just otherwise be a non-descriptive coloured box.

    It is designed to be used with the entity view set to WireFrame (as the sprite images are rendered in the middle of the entity's bbox.

    How ?
    -----

    Implemented as a model module, without any ISelect stuff.

    For an entity to use an image (instead of a model) you just update the entity defintion file so that the eclass_t's modelpath is filled in with a relative path and filename of an image file.

    e.g:

      baseq3/scripts/entities.def
      ===========================

   \/\*QUAKED ammo_bfg (.3 .3 1) (-16 -16 -16) (16 16 16) SUSPENDED
      ...
      -------- MODEL FOR RADIANT ONLY - DO NOT SET THIS AS A KEY --------
      model="sprites/powerups/ammo/bfgam.bmp"\*\/


      valve/scripts/halflife.fgd
      ==========================

      @PointClass iconsprite("sprites/lightbulb.spr") base(Target, Targetname, Light) = light : "Invisible   lightsource"
      [
              ...
      ]

    What image formats are supported ?
    ----------------------------------

    This module can load any image format that there is an active image module for.  For q3 this would be bmp, tga and jpg.  For Half-Life this would be hlw and spr.

    Version History
    ===============

    v0.1 - 27/May/2002
      - Created an inital implementation of a sprite model plugin.
        According to the powers that be, it seems creating a model
        plugin is hackish.
        It works ok, but there is no way to attach models (sprites if you will)
        to non-fixedsize entities (like func_bombtarget)
        Also, I can't get the alpha map stuff right so I had to invert the alpha
        mask in the spr loader so that 0xff = not drawn pixel.

    ToDo
    ====

 * make sprites always face the camera (is this done in camwindow.cpp ?)

 * maybe add an option to scale the sprites in the prefs ?

 * un-hack the default fall-though to "sprite" model version (see m_version)

 * maybe convert to a new kind of class not based on model.

 * allow sprites on non-fixedsize ents

 * fix reversed alpha map in spr loader

 * allow an entity to have both an .md? and a sprite model.
 */

#include "plugin.h"
#include "spritemodel.h"

// =============================================================================
// Globals

// function tables
_QERFuncTable_1 __QERTABLENAME;
OpenGLBinding g_QglTable;
_QERShadersTable g_ShadersTable;

// =============================================================================
// SYNAPSE

#include "synapse.h"


char *supportedmodelformats[] = {"spr","bmp","tga","jpg","hlw",NULL}; // NULL is list delimiter

static void add_model_apis( CSynapseClient& client ){
	char **ext;
	for ( ext = supportedmodelformats; *ext != NULL; ext++ )
	{
		client.AddAPI( MODEL_MAJOR, *ext, sizeof( _QERPlugModelTable ) );
	}
}

static bool model_is_supported( const char* extension ){
	char **ext;
	for ( ext = supportedmodelformats; *ext != NULL; ext++ )
	{
		if ( stricmp( extension,*ext ) == 0 ) {
			return true;
		}
	}
	return false;
}

void init_filetypes(){
	char **ext;
	for ( ext = supportedmodelformats; *ext != NULL; ext++ )
	{
		GetFileTypeRegistry()->addType( MODEL_MAJOR, filetype_t( "sprite", *ext ) );
	}
}

extern CSynapseServer* g_pSynapseServer;

class CSynapseClientModel : public CSynapseClient
{
public:
// CSynapseClient API
bool RequestAPI( APIDescriptor_t *pAPI );
const char* GetInfo();
const char* GetName();

CSynapseClientModel() { }
virtual ~CSynapseClientModel() { }

bool OnActivate(){
	init_filetypes(); // see todo list above.
	return true;
}
};

CSynapseServer* g_pSynapseServer = NULL;
CSynapseClientModel g_SynapseClient;

extern "C" CSynapseClient * SYNAPSE_DLL_EXPORT Synapse_EnumerateInterfaces( const char *version, CSynapseServer *pServer ){
	if ( strcmp( version, SYNAPSE_VERSION ) ) {
		Syn_Printf( "ERROR: synapse API version mismatch: should be '" SYNAPSE_VERSION "', got '%s'\n", version );
		return NULL;
	}
	g_pSynapseServer = pServer;
	g_pSynapseServer->IncRef();
	Set_Syn_Printf( g_pSynapseServer->Get_Syn_Printf() );

	add_model_apis( g_SynapseClient ); // see todo list above.

	g_SynapseClient.AddAPI( PLUGIN_MAJOR, "sprite", sizeof( _QERPluginTable ) );
	g_SynapseClient.AddAPI( RADIANT_MAJOR, NULL, sizeof( g_FuncTable ), SYN_REQUIRE, &g_FuncTable );
	g_SynapseClient.AddAPI( QGL_MAJOR, NULL, sizeof( g_QglTable ), SYN_REQUIRE, &g_QglTable );
	g_SynapseClient.AddAPI( SHADERS_MAJOR, "*", sizeof( g_ShadersTable ), SYN_REQUIRE, &g_ShadersTable );

	return &g_SynapseClient;
}

bool CSynapseClientModel::RequestAPI( APIDescriptor_t *pAPI ){
	if ( !strcmp( pAPI->major_name, MODEL_MAJOR ) ) {
		_QERPlugModelTable* pTable = static_cast<_QERPlugModelTable*>( pAPI->mpTable );

		if ( !strcmp( pAPI->minor_name, "sprite" ) ) {
			pTable->m_pfnLoadModel = &LoadSpriteModel;
			return true;
		}
	}

	Syn_Printf( "ERROR: RequestAPI( '%s' ) not found in '%s'\n", pAPI->major_name, GetInfo() );
	return false;
}

const char* CSynapseClientModel::GetInfo(){
	return "Sprite Model module built " __DATE__ " " RADIANT_VERSION;
}

const char* CSynapseClientModel::GetName(){
	return "sprite";
}
