1 files changed, 297 insertions, 0 deletions
diff --git a/sword2/layers.cpp b/sword2/layers.cpp
new file mode 100644
index 0000000000..0cf405407f
--- /dev/null
+++ b/sword2/layers.cpp
@@ -0,0 +1,297 @@
+/* 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.
+ *
+ * $Header$
+ */
+
+//------------------------------------------------------------------------------------
+//high level layer initialising
+
+//the system supports:
+//		1 optional background parallax layer
+//		1 not optional normal backdrop layer
+//		3 normal sorted layers
+//		up to 2 foreground parallax layers
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "driver/driver96.h"
+#include "build_display.h"
+#include "console.h"
+#include "debug.h"
+#include "header.h"
+#include "layers.h"
+#include "memory.h"
+#include "object.h"
+#include "protocol.h"
+#include "resman.h"
+#include "sound.h"	// (James22july97) for Clear_fx_queue() called from FN_init_background()
+
+//------------------------------------------------------------------------------------
+
+
+screen_info	this_screen;	//this_screen describes the current back buffer and its in-game scroll positions, etc.
+//------------------------------------------------------------------------------------
+int32 FN_init_background(int32 *params)	//Tony11Sept96
+{
+//param	0 res id of normal background layer - cannot be 0
+//param	1 1 yes 0 no for a new palette
+//this screen defines the size of the back buffer
+
+	_multiScreenHeader *screenLayerTable;	// James 06feb97
+	_screenHeader	*screen_head;
+	_layerHeader	*layer;
+ 	_spriteInfo		spriteInfo;
+	uint32	j;
+	uint8	*file;
+	uint32	rv;
+
+
+	//--------------------------------------
+	// Write to walkthrough file (zebug0.txt)
+	#ifdef _DEBUG
+	Zdebug(0,"=====================================");
+	Zdebug(0,"CHANGED TO LOCATION \"%s\"", FetchObjectName(*params));
+	Zdebug(0,"=====================================");
+
+	// Also write this to system debug file
+	Zdebug("=====================================");
+	Zdebug("CHANGED TO LOCATION \"%s\"", FetchObjectName(*params));
+	Zdebug("=====================================");
+	#endif
+ 	//--------------------------------------
+
+	Clear_fx_queue();		// stops all fx & clears the queue (James22july97)
+
+
+#ifdef _DEBUG
+	Zdebug("FN_init_background(%d)", *params);
+
+	if	(!*params)
+	{
+		Con_fatal_error("ERROR: FN_set_background cannot have 0 for background layer id! (%s line=%u)",__FILE__,__LINE__);
+	}
+#endif // _DEBUG
+
+
+	//-------------------------------------------------------
+	// if the screen is still fading down then wait for black
+	do
+	{
+		ServiceWindows();
+	}
+	while(GetFadeStatus()==RDFADE_DOWN);
+	//-------------------------------------------------------
+
+	if (this_screen.mask_flag)	// if last screen was using a shading mask (see below) (James 08apr97)
+	{
+		rv = CloseLightMask();
+
+		if (rv)
+			ExitWithReport("Driver Error %.8x [%s line %u]", rv, __FILE__, __LINE__);
+	}
+	
+	//--------------------------------------------------------
+	// New stuff for faster screen drivers (James 06feb97)
+
+	if (this_screen.background_layer_id)	// for drivers: close the previous screen if one is open
+		CloseBackgroundLayer();
+
+	//--------------------------------------------------------
+
+
+	this_screen.background_layer_id=*params;	//set the res id
+	this_screen.new_palette = *(params+1);	//yes or no - palette is taken from layer file
+
+
+//ok, now read the resource and pull out all the normal sort layer info
+//and set them up at the beginning of the sort list - why do it each cycle
+
+
+	file = res_man.Res_open(this_screen.background_layer_id);	//file points to 1st byte in the layer file
+	
+	screen_head = FetchScreenHeader(file);
+
+	this_screen.number_of_layers= screen_head->noLayers;	//set number of special sort layers
+	this_screen.screen_wide = screen_head->width;
+	this_screen.screen_deep = screen_head->height;
+
+	Zdebug("res test layers=%d width=%d depth=%d", screen_head->noLayers, screen_head->width, screen_head->height);
+
+	SetLocationMetrics(screen_head->width, screen_head->height);	//initialise the driver back buffer
+
+
+	if	(screen_head->noLayers)
+		for	(j=0;j<screen_head->noLayers;j++)
+		{
+			layer=FetchLayerHeader(file,j);	//get layer header for layer j
+
+//			add into the sort list
+
+			sort_list[j].sort_y = layer->y+layer->height;	//need this for sorting - but leave the rest blank, we'll take from the header at print time
+			sort_list[j].layer_number=j+1;	//signifies a layer
+
+			Zdebug("init layer %d", j);
+		}
+
+
+
+//using the screen size setup the scrolling variables
+
+	if( ((screen_head->width) > screenWide) || (screen_head->height>screenDeep) )	// if layer is larger than physical screen
+	{
+		this_screen.scroll_flag = 2;	//switch on scrolling (2 means first time on screen)
+
+//	note, if we've already set the player up then we could do the initial scroll set here
+
+		this_screen.scroll_offset_x = 0;	//reset scroll offsets
+		this_screen.scroll_offset_y = 0;
+
+//		calc max allowed offsets (to prevent scrolling off edge) - MOVE TO NEW_SCREEN in GTM_CORE.C !!
+		this_screen.max_scroll_offset_x = screen_head->width-screenWide;		// NB. min scroll offsets are both zero
+		this_screen.max_scroll_offset_y = screen_head->height-(screenDeep-(RDMENU_MENUDEEP*2));	// 'screenDeep' includes the menu's, so take away 80 pixels
+	}
+	else	//layer fits on physical screen - scrolling not required
+	{
+		this_screen.scroll_flag = 0;	//switch off scrolling
+		this_screen.scroll_offset_x = 0;	//reset scroll offsets
+		this_screen.scroll_offset_y = 0;
+	}
+
+	ResetRenderEngine();	//no inter-cycle scrol between new screens (see setScrollTarget in build display)
+
+	// these are the physical screen coords where the system
+	// will try to maintain George's actual feet coords
+	this_screen.feet_x=320;
+	this_screen.feet_y=340;
+
+
+	//----------------------------------------------------
+	// shading mask
+
+	screenLayerTable = (_multiScreenHeader *) ((uint8 *) file + sizeof(_standardHeader));
+
+	if (screenLayerTable->maskOffset)
+	{
+		spriteInfo.x			= 0;
+		spriteInfo.y			= 0;
+		spriteInfo.w			= screen_head->width;
+		spriteInfo.h			= screen_head->height;
+		spriteInfo.scale		= 0;
+		spriteInfo.scaledWidth	= 0;
+		spriteInfo.scaledHeight	= 0;
+		spriteInfo.type			= 0;
+		spriteInfo.blend		= 0;
+		spriteInfo.data			= FetchShadingMask(file);
+		spriteInfo.colourTable	= 0;
+
+		rv = OpenLightMask( &spriteInfo );
+		if (rv)
+			ExitWithReport("Driver Error %.8x [%s line %u]", rv, __FILE__, __LINE__);
+
+		this_screen.mask_flag=1;	// so we know to close it later! (see above)
+	}
+	else
+		this_screen.mask_flag=0;	// no need to close a mask later
+
+	//----------------------------------------------------
+
+   	res_man.Res_close(this_screen.background_layer_id);	//close the screen file
+
+	SetUpBackgroundLayers();
+
+
+	Zdebug("end init");
+	return(1);
+}
+//------------------------------------------------------------------------------------
+// called from FN_init_background & also from control panel
+
+void SetUpBackgroundLayers(void)	// James(13jun97)
+{
+	_multiScreenHeader *screenLayerTable;	// James 06feb97
+	_screenHeader	*screen_head;
+	uint8	*file;
+
+
+	if (this_screen.background_layer_id)	// if we actually have a screen to initialise (in case called from control panel)
+	{
+		//------------------------------
+		// open resource & set pointers to headers
+
+		file = res_man.Res_open(this_screen.background_layer_id);	//file points to 1st byte in the layer file
+
+		screen_head = FetchScreenHeader(file);
+
+		screenLayerTable = (_multiScreenHeader *) ((uint8 *) file + sizeof(_standardHeader));
+
+		//------------------------------
+		// first background parallax
+
+		if (screenLayerTable->bg_parallax[0])
+			InitialiseBackgroundLayer(FetchBackgroundParallaxLayer(file,0));
+		else
+			InitialiseBackgroundLayer(NULL);
+
+		//------------------------------
+		// second background parallax
+
+		if (screenLayerTable->bg_parallax[1])
+			InitialiseBackgroundLayer(FetchBackgroundParallaxLayer(file,1));
+		else
+			InitialiseBackgroundLayer(NULL);
+
+		//------------------------------
+		// normal backround layer
+
+		InitialiseBackgroundLayer(FetchBackgroundLayer(file));
+
+		//------------------------------
+		// first foreground parallax
+
+		if (screenLayerTable->fg_parallax[0])
+			InitialiseBackgroundLayer(FetchForegroundParallaxLayer(file,0));
+		else
+			InitialiseBackgroundLayer(NULL);
+
+		//------------------------------
+		// second foreground parallax
+
+		if (screenLayerTable->fg_parallax[1])
+			InitialiseBackgroundLayer(FetchForegroundParallaxLayer(file,1));
+		else
+			InitialiseBackgroundLayer(NULL);
+
+ 		//----------------------------------------------------
+
+		res_man.Res_close(this_screen.background_layer_id);	//close the screen file
+
+	 	//----------------------------------------------------
+	}
+	else	// no current screen to initialise! (In case called from control panel)
+	{
+	}
+}
+
+//------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------