mirror of
https://github.com/libretro/scummvm.git
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283 lines
6.7 KiB
C++
283 lines
6.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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* Plays the background film of a scene.
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*/
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#include "tinsel/anim.h"
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#include "tinsel/background.h"
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#include "tinsel/dw.h"
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#include "tinsel/faders.h"
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#include "tinsel/film.h"
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#include "tinsel/font.h"
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#include "tinsel/handle.h"
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#include "tinsel/multiobj.h"
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#include "tinsel/object.h"
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#include "tinsel/pcode.h" // CONTROL_STARTOFF
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#include "tinsel/pid.h"
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#include "tinsel/sched.h"
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#include "tinsel/timers.h" // For ONE_SECOND constant
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#include "tinsel/tinlib.h" // For Control()
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#include "tinsel/tinsel.h"
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#include "common/util.h"
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namespace Tinsel {
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//----------------- LOCAL GLOBAL DATA --------------------
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#define MAX_BG 10
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static SCNHANDLE hBgPal = 0; // Background's palette
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static POBJECT pBG[MAX_BG];
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static ANIM thisAnim[MAX_BG]; // used by BGmainProcess()
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static int BGspeed = 0;
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static SCNHANDLE hBackground = 0; // Current scene handle - stored in case of Save_Scene()
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static bool bDoFadeIn = false;
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static int bgReels;
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/**
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* GetBgObject
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*/
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OBJECT *GetBgObject() {
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return pBG[0];
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}
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/**
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* BackPal
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*/
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SCNHANDLE BgPal() {
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return hBgPal;
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}
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/**
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* SetDoFadeIn
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*/
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void SetDoFadeIn(bool tf) {
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bDoFadeIn = tf;
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}
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/**
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* Called before scene change.
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*/
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void DropBackground() {
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pBG[0] = NULL; // No background
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if (!TinselV2)
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hBgPal = 0; // No background palette
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}
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/**
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* Return the width of the current background.
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*/
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int BgWidth() {
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assert(pBG[0]);
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return MultiRightmost(pBG[0]) + 1;
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}
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/**
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* Return the height of the current background.
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*/
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int BgHeight() {
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assert(pBG[0]);
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return MultiLowest(pBG[0]) + 1;
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}
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/**
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* Run main animation that comprises the scene background.
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*/
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static void BGmainProcess(CORO_PARAM, const void *param) {
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// COROUTINE
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CORO_BEGIN_CONTEXT;
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CORO_END_CONTEXT(_ctx);
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CORO_BEGIN_CODE(_ctx);
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const FILM *pFilm;
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const FREEL *pReel;
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const MULTI_INIT *pmi;
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// get the stuff copied to process when it was created
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if (pBG[0] == NULL) {
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/*** At start of scene ***/
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if (!TinselV2) {
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pReel = (const FREEL *)param;
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// Get the MULTI_INIT structure
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pmi = (const MULTI_INIT *)LockMem(FROM_LE_32(pReel->mobj));
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// Initialise and insert the object, and initialise its script.
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pBG[0] = MultiInitObject(pmi);
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MultiInsertObject(GetPlayfieldList(FIELD_WORLD), pBG[0]);
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InitStepAnimScript(&thisAnim[0], pBG[0], FROM_LE_32(pReel->script), BGspeed);
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bgReels = 1;
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} else {
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/*** At start of scene ***/
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pFilm = (const FILM *)LockMem(hBackground);
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bgReels = FROM_LE_32(pFilm->numreels);
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int i;
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for (i = 0; i < bgReels; i++) {
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// Get the MULTI_INIT structure
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pmi = (PMULTI_INIT) LockMem(FROM_LE_32(pFilm->reels[i].mobj));
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// Initialise and insert the object, and initialise its script.
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pBG[i] = MultiInitObject(pmi);
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MultiInsertObject(GetPlayfieldList(FIELD_WORLD), pBG[i]);
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MultiSetZPosition(pBG[i], 0);
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InitStepAnimScript(&thisAnim[i], pBG[i], FROM_LE_32(pFilm->reels[i].script), BGspeed);
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if (i > 0)
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pBG[i-1]->pSlave = pBG[i];
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}
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}
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if (bDoFadeIn) {
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FadeInFast(NULL);
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bDoFadeIn = false;
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} else if (TinselV2)
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PokeInTagColour();
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for (;;) {
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for (int i = 0; i < bgReels; i++) {
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if (StepAnimScript(&thisAnim[i]) == ScriptFinished)
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error("Background animation has finished");
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}
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CORO_SLEEP(1);
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}
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} else {
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// New background during scene
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if (!TinselV2) {
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pReel = (const FREEL *)param;
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InitStepAnimScript(&thisAnim[0], pBG[0], FROM_LE_32(pReel->script), BGspeed);
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StepAnimScript(&thisAnim[0]);
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} else {
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pFilm = (const FILM *)LockMem(hBackground);
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assert(bgReels == (int32)FROM_LE_32(pFilm->numreels));
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// Just re-initialise the scripts.
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for (int i = 0; i < bgReels; i++) {
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InitStepAnimScript(&thisAnim[i], pBG[i], pFilm->reels[i].script, BGspeed);
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StepAnimScript(&thisAnim[i]);
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}
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}
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}
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CORO_END_CODE;
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}
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/**
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* Runs secondary reels for a scene background
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*/
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static void BGotherProcess(CORO_PARAM, const void *param) {
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// COROUTINE
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CORO_BEGIN_CONTEXT;
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OBJECT *pObj;
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ANIM anim;
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CORO_END_CONTEXT(_ctx);
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const FREEL *pReel = (const FREEL *)param;
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const MULTI_INIT *pmi = (const MULTI_INIT *)LockMem(FROM_LE_32(pReel->mobj));
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CORO_BEGIN_CODE(_ctx);
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// Initialise and insert the object, and initialise its script.
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_ctx->pObj = MultiInitObject(pmi);
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MultiInsertObject(GetPlayfieldList(FIELD_WORLD), _ctx->pObj);
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InitStepAnimScript(&_ctx->anim, pBG[0], FROM_LE_32(pReel->script), BGspeed);
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while (StepAnimScript(&_ctx->anim) != ScriptFinished)
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CORO_SLEEP(1);
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CORO_END_CODE;
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}
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/**
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* AetBgPal()
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*/
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void SetBackPal(SCNHANDLE hPal) {
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hBgPal = hPal;
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FettleFontPal(hBgPal);
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CreateTranslucentPalette(hBgPal);
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}
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void ChangePalette(SCNHANDLE hPal) {
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SwapPalette(FindPalette(hBgPal), hPal);
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SetBackPal(hPal);
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}
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/**
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* Given the scene background film, extracts the palette handle for
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* everything else's use, then starts a display process for each reel
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* in the film.
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* @param hFilm Scene background film
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*/
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void StartupBackground(CORO_PARAM, SCNHANDLE hFilm) {
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CORO_BEGIN_CONTEXT;
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CORO_END_CONTEXT(_ctx);
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CORO_BEGIN_CODE(_ctx);
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const FILM *pfilm;
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IMAGE *pim;
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hBackground = hFilm; // Save handle in case of Save_Scene()
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pim = GetImageFromFilm(hFilm, 0, NULL, NULL, &pfilm);
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SetBackPal(FROM_LE_32(pim->hImgPal));
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// Extract the film speed
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BGspeed = ONE_SECOND / FROM_LE_32(pfilm->frate);
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// Start display process for each reel in the film
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g_scheduler->createProcess(PID_REEL, BGmainProcess, &pfilm->reels[0], sizeof(FREEL));
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if (TinselV0) {
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for (uint i = 1; i < FROM_LE_32(pfilm->numreels); ++i)
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g_scheduler->createProcess(PID_REEL, BGotherProcess, &pfilm->reels[i], sizeof(FREEL));
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}
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if (pBG[0] == NULL)
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ControlStartOff();
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if (TinselV2 && (coroParam != nullContext))
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CORO_GIVE_WAY;
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CORO_END_CODE;
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}
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/**
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* Return the current scene handle.
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*/
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SCNHANDLE GetBgroundHandle() {
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return hBackground;
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}
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} // End of namespace Tinsel
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