text: /*
   *  ati_resolution.c
   *  
   *
   *  Created by Le Bidou on 19/03/10.
   *  Copyright 2010 ---. All rights reserved.
   *
   */
  
  #include "ati_resolution.h"
  
  char detect_ati_bios_type(vbios_map * map) {	
  	return map->mode_table_size % sizeof(ATOM_MODE_TIMING) == 0;
  }
  
  vbios_map * open_ati_vbios(vbios_map * map, bios_tables_t ati_tables)
  {
  	/*
  	 * Locate the Standard VESA Table
  	 */
  	
  	ati_tables.MasterDataTables = (unsigned short *) &((ATOM_MASTER_DATA_TABLE *) (map->bios_ptr + ati_tables.AtomRomHeader->usMasterDataTableOffset))->ListOfDataTables;
  	unsigned short std_vesa_offset = (unsigned short) ((ATOM_MASTER_LIST_OF_DATA_TABLES *)ati_tables.MasterDataTables)->StandardVESA_Timing;
  	ATOM_STANDARD_VESA_TIMING * std_vesa = (ATOM_STANDARD_VESA_TIMING *) (map->bios_ptr + std_vesa_offset);
  	
  	map->mode_table = (char *) &std_vesa->aModeTimings;
  	PRINT("Standard VESA Table at offset * 0x%x\n", std_vesa_offset);
  	if (map->mode_table == 0) {
  		PRINT("Unable to locate the mode table.\n");
  		PRINT("Please run the program 'dump_bios' as root and\n");
  		PRINT("email the file 'vbios.dmp' to gaeloulacuisse@yahoo.fr.\n");
  		
  		close_vbios(map);
  		return 0;
  	}
  	
  	//Determine Size of the Table
  	map->mode_table_size = std_vesa->sHeader.usStructureSize - sizeof(ATOM_COMMON_TABLE_HEADER);
  	
  	/*
  	 * Find out type of table and how many entries it has
  	 */
  	
  	if (!detect_ati_bios_type(map)) map->bios = BT_ATI_2;
  	if (map->bios == BT_ATI_2) {
  		map->modeline_num = map->mode_table_size / sizeof(ATOM_DTD_FORMAT);
  		PRINT("Using DTD Format modelines\n");
  	} else {
  		map->modeline_num = map->mode_table_size / sizeof(ATOM_MODE_TIMING);
  		PRINT("Using Atom Mode Timing modelines\n");
  	}
  	return map;
  }
  
  bool ati_set_mode_1(vbios_map* map, UInt8 idx, UInt32* x, UInt32* y)
  {
  	ATOM_MODE_TIMING *mode_timing = (ATOM_MODE_TIMING *) map->mode_table;
  	
  	if ((*x != 0) && (*y != 0) && ( mode_timing[idx].usCRTC_H_Disp >= 640 )) {
  		
  		PRINT("Mode %dx%d -> %dx%d\n",mode_timing[idx].usCRTC_H_Disp,mode_timing[idx].usCRTC_V_Disp,
  			   *x, *y);
  		
  		mode_timing[idx].usCRTC_H_Disp = *x;
  		mode_timing[idx].usCRTC_V_Disp = *y;
  	}
  	
  	*x = mode_timing[idx + 1].usCRTC_H_Disp;
  	*y = mode_timing[idx + 1].usCRTC_V_Disp;
  	
  	return TRUE;
  }
  
  bool ati_set_mode_2(vbios_map* map, UInt8 idx, UInt32* x, UInt32* y)
  {
  	ATOM_DTD_FORMAT *mode_timing = (ATOM_DTD_FORMAT *) map->mode_table;
  	
  	if ((*x != 0) && (*y != 0) && ( mode_timing[idx].usHActive >= 640 )) {
  		
  		PRINT("Mode %dx%d -> %dx%d\n", mode_timing[idx].usHActive, mode_timing[idx].usHActive,
  			   *x, *y);
  		
  		mode_timing[idx].usHActive = *x;
  		mode_timing[idx].usVActive = *y;
  	}
  	
  	*x = mode_timing[idx + 1].usHActive;
  	*y = mode_timing[idx + 1].usVActive;
  	
  	return TRUE;
  }
  