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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
* Plays the background film of a scene.
*/
#include "tinsel/anim.h"
#include "tinsel/background.h"
#include "tinsel/dw.h"
#include "tinsel/faders.h"
#include "tinsel/film.h"
#include "tinsel/font.h"
#include "tinsel/handle.h"
#include "tinsel/multiobj.h"
#include "tinsel/object.h"
#include "tinsel/pcode.h" // CONTROL_STARTOFF
#include "tinsel/pid.h"
#include "tinsel/sched.h"
#include "tinsel/timers.h" // For ONE_SECOND constant
#include "tinsel/tinlib.h" // For control()
#include "common/util.h"
namespace Tinsel {
//----------------- LOCAL GLOBAL DATA --------------------
static SCNHANDLE BackPalette = 0; // Background's palette
static OBJECT *pBG = 0; // The main picture's object.
static int BGspeed = 0;
static SCNHANDLE BgroundHandle = 0; // Current scene handle - stored in case of Save_Scene()
static bool DoFadeIn = false;
static ANIM thisAnim; // used by BGmainProcess()
/**
* BackPal
*/
SCNHANDLE BackPal(void) {
return BackPalette;
}
/**
* SetDoFadeIn
*/
void SetDoFadeIn(bool tf) {
DoFadeIn = tf;
}
/**
* Called before scene change.
*/
void DropBackground(void) {
pBG = NULL; // No background
BackPalette = 0; // No background palette
}
/**
* Return the width of the current background.
*/
int BackgroundWidth(void) {
assert(pBG);
return MultiRightmost(pBG) + 1;
}
/**
* Return the height of the current background.
*/
int BackgroundHeight(void) {
assert(pBG);
return MultiLowest(pBG) + 1;
}
/**
* Run main animation that comprises the scene background.
*/
static void BGmainProcess(CORO_PARAM) {
// COROUTINE
CORO_BEGIN_CONTEXT;
CORO_END_CONTEXT(_ctx);
CORO_BEGIN_CODE(_ctx);
const FREEL *pfr;
const MULTI_INIT *pmi;
// get the stuff copied to process when it was created
pfr = (const FREEL *)ProcessGetParamsSelf();
if (pBG == NULL) {
/*** At start of scene ***/
// Get the MULTI_INIT structure
pmi = (const MULTI_INIT *)LockMem(FROM_LE_32(pfr->mobj));
// Initialise and insert the object, and initialise its script.
pBG = MultiInitObject(pmi);
MultiInsertObject(GetPlayfieldList(FIELD_WORLD), pBG);
InitStepAnimScript(&thisAnim, pBG, FROM_LE_32(pfr->script), BGspeed);
if (DoFadeIn) {
FadeInFast(NULL);
DoFadeIn = false;
}
while (StepAnimScript(&thisAnim) != ScriptFinished)
CORO_SLEEP(1);
error("Background animation has finished!");
} else {
// New background during scene
// Just re-initialise the script.
InitStepAnimScript(&thisAnim, pBG, FROM_LE_32(pfr->script), BGspeed);
StepAnimScript(&thisAnim);
}
CORO_END_CODE;
}
/**
* setBackPal()
*/
void setBackPal(SCNHANDLE hPal) {
BackPalette = hPal;
fettleFontPal(BackPalette);
CreateTranslucentPalette(BackPalette);
}
void ChangePalette(SCNHANDLE hPal) {
SwapPalette(FindPalette(BackPalette), hPal);
setBackPal(hPal);
}
/**
* Given the scene background film, extracts the palette handle for
* everything else's use, then starts a display process for each reel
* in the film.
* @param bfilm Scene background film
*/
void startupBackground(SCNHANDLE bfilm) {
const FILM *pfilm;
PIMAGE pim;
BgroundHandle = bfilm; // Save handle in case of Save_Scene()
pim = GetImageFromFilm(bfilm, 0, NULL, NULL, &pfilm);
setBackPal(FROM_LE_32(pim->hImgPal));
// Extract the film speed
BGspeed = ONE_SECOND / FROM_LE_32(pfilm->frate);
if (pBG == NULL)
control(CONTROL_STARTOFF); // New feature - start scene with control off
// Start display process for each reel in the film
assert(FROM_LE_32(pfilm->numreels) == 1); // Multi-reeled backgrounds withdrawn
CoroutineInstall(PID_REEL, BGmainProcess, &pfilm->reels[0], sizeof(FREEL));
}
/**
* Return the current scene handle.
*/
SCNHANDLE GetBgroundHandle(void) {
return BgroundHandle;
}
} // end of namespace Tinsel
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