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/* Copyright (C) 1994-2003 Revolution Software Ltd
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#include <stdio.h>
#include "stdafx.h"
#include "console.h"
#include "defs.h"
#include "header.h"
#include "memory.h"
#include "protocol.h"
#include "resman.h"
// Returns a pointer to the first palette entry, given the pointer to the
// start of the screen file.
uint8 *FetchPalette(uint8 *screenFile) { // Chris 04Oct96
uint8 *palette;
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
palette = (uint8 *) mscreenHeader + mscreenHeader->palette;
// Always set colour 0 to black, because while most background screen
// palettes have a bright colour 0 it should come out as black in the
// game.
palette[0] = 0;
palette[1] = 0;
palette[2] = 0;
palette[3] = 0;
return palette;
}
// Returns a pointer to the start of the palette match table, given the
// pointer to the start of the screen file.
uint8 *FetchPaletteMatchTable(uint8 *screenFile) { // James 09dec96
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
return (uint8 *) mscreenHeader + mscreenHeader->paletteTable;
}
// Returns a pointer to the screen header, given the pointer to the start of
// the screen file.
_screenHeader *FetchScreenHeader(uint8 *screenFile) { // Chris 04Oct96
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
_screenHeader *screenHeader = (_screenHeader*) ((uint8 *) mscreenHeader + mscreenHeader->screen);
return screenHeader;
}
// Returns a pointer to the requested layer header, given the pointer to the
// start of the screen file. Drops out if the requested layer number exceeds
// the number of layers on this screen.
_layerHeader *FetchLayerHeader(uint8 *screenFile, uint16 layerNo) { // Chris 04Oct96
#ifdef _SWORD2_DEBUG
_screenHeader *screenHead = FetchScreenHeader(screenFile);
if (layerNo > screenHead->noLayers - 1)
Con_fatal_error("FetchLayerHeader(%d) invalid layer number! (%s line %u)", layerNo, __FILE__, __LINE__);
#endif
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
_layerHeader *layerHeader = (_layerHeader *) ((uint8 *) mscreenHeader + mscreenHeader->layers + (layerNo * sizeof(_layerHeader)));
return layerHeader;
}
// Returns a pointer to the start of the shading mask, given the pointer to
// the start of the screen file.
uint8 *FetchShadingMask(uint8 *screenFile) { // James 08apr97
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
return (uint8 *) mscreenHeader + mscreenHeader->maskOffset;
}
// Returns a pointer to the anim header, given the pointer to the start of
// the anim file.
_animHeader *FetchAnimHeader(uint8 *animFile) { // (25sep96JEL)
return (_animHeader *) (animFile + sizeof(_standardHeader));
}
// Returns a pointer to the requested frame number's cdtEntry, given the
// pointer to the start of the anim file. Drops out if the requested frame
// number exceeds the number of frames in this anim.
_cdtEntry *FetchCdtEntry(uint8 *animFile, uint16 frameNo) { // Chris 09Oct96
_animHeader *animHead = FetchAnimHeader(animFile);
#ifdef _SWORD2_DEBUG
if (frameNo > animHead->noAnimFrames - 1)
Con_fatal_error("FetchCdtEntry(animFile,%d) - anim only %d frames (%s line %u)", frameNo, animHead->noAnimFrames, __FILE__, __LINE__);
#endif
return (_cdtEntry *) ((uint8 *) animHead + sizeof(_animHeader) + frameNo * sizeof(_cdtEntry));
}
// Returns a pointer to the requested frame number's header, given the
// pointer to the start of the anim file. Drops out if the requested frame
// number exceeds the number of frames in this anim
_frameHeader *FetchFrameHeader(uint8 *animFile, uint16 frameNo) { // James 31oct96
// required address = (address of the start of the anim header) + frameOffset
return (_frameHeader *) (animFile + sizeof(_standardHeader) + FetchCdtEntry(animFile, frameNo)->frameOffset);
}
// Returns a pointer to the requested parallax layer data.
_parallax *FetchBackgroundParallaxLayer(uint8 *screenFile, int layer) { // Chris 04Oct96
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
#ifdef _SWORD2_DEBUG
if (mscreenHeader->bg_parallax[layer] == 0)
Con_fatal_error("FetchBackgroundParallaxLayer(%d) - No parallax layer exists (%s line %u)", layer, __FILE__, __LINE__);
#endif
return (_parallax *) ((uint8 *) mscreenHeader + mscreenHeader->bg_parallax[layer]);
}
_parallax *FetchBackgroundLayer(uint8 *screenFile) { // Chris 04Oct96
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
#ifdef _SWORD2_DEBUG
if (mscreenHeader->screen == 0)
Con_fatal_error("FetchBackgroundLayer (%d) - No background layer exists (%s line %u)", __FILE__, __LINE__);
#endif
return (_parallax *) ((uint8 *) mscreenHeader + mscreenHeader->screen + sizeof(_screenHeader));
}
_parallax *FetchForegroundParallaxLayer(uint8 *screenFile, int layer) { // Chris 04Oct96
_multiScreenHeader *mscreenHeader = (_multiScreenHeader *) (screenFile + sizeof(_standardHeader));
#ifdef _SWORD2_DEBUG
if (mscreenHeader->fg_parallax[layer] == 0)
Con_fatal_error("FetchForegroundParallaxLayer(%d) - No parallax layer exists (%s line %u)",layer, __FILE__, __LINE__);
#endif
return (_parallax *) ((uint8 *) mscreenHeader + mscreenHeader->fg_parallax[layer]);
}
uint8 errorLine[128];
uint8 *FetchTextLine(uint8 *file, uint32 text_line) { // Tony24Oct96
_standardHeader *fileHeader;
uint32 *point;
_textHeader *text_header = (_textHeader *) (file + sizeof(_standardHeader));
if (text_line >= text_header->noOfLines) { // (James08aug97)
fileHeader = (_standardHeader*)file;
sprintf((char*) errorLine, "xxMissing line %d of %s (only 0..%d)", text_line, fileHeader->name, text_header->noOfLines - 1);
// first 2 chars are NULL so that actor-number comes out as '0'
errorLine[0] = 0;
errorLine[1] = 0;
return errorLine;
}
//point to the lookup table
point = (uint32*) text_header + 1;
return (uint8*) (file + READ_LE_UINT32(point + text_line));
}
// Used for testing text & speech (see FN_I_speak in speech.cpp)
uint8 CheckTextLine(uint8 *file, uint32 text_line) { // (James26jun97)
_textHeader *text_header = (_textHeader *) (file + sizeof(_standardHeader));
// out of range => invalid
if (text_line >= text_header->noOfLines)
return 0;
// valid
return 1;
}
uint8 *FetchObjectName(int32 resourceId) { // James15jan97
_standardHeader *header;
header = (_standardHeader*) res_man.Res_open(resourceId);
res_man.Res_close(resourceId);
// note this pointer is no longer valid, but it should be ok until
// another resource is opened!
// FIXME: I don't like the sound of this at all. Though thanks to the
// BS2 memory manager, at least it will still point to malloced
// memory.
return header->name;
}
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