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Diffstat (limited to 'engines/tinsel/bg.cpp')
| -rw-r--r-- | engines/tinsel/bg.cpp | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/engines/tinsel/bg.cpp b/engines/tinsel/bg.cpp new file mode 100644 index 0000000000..cf7e18dc08 --- /dev/null +++ b/engines/tinsel/bg.cpp @@ -0,0 +1,189 @@ +/* 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 |