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Diffstat (limited to 'engines/tinsel/multiobj.cpp')
| -rw-r--r-- | engines/tinsel/multiobj.cpp | 533 |
1 files changed, 533 insertions, 0 deletions
diff --git a/engines/tinsel/multiobj.cpp b/engines/tinsel/multiobj.cpp new file mode 100644 index 0000000000..c60592069f --- /dev/null +++ b/engines/tinsel/multiobj.cpp @@ -0,0 +1,533 @@ +/* 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. + * + * $URL$ + * $Id$ + * + * This file contains utilities to handle multi-part objects. + */ + +#include "tinsel/multiobj.h" +#include "tinsel/handle.h" +#include "tinsel/object.h" + +namespace Tinsel { + +// from object.c +extern OBJECT *objectList; + +/** + * Initialise a multi-part object using a list of images to init + * each object piece. One object is created for each image in the list. + * All objects are given the same palette as the first image. A pointer + * to the first (master) object created is returned. + * @param pInitTbl Pointer to multi-object initialisation table + */ +OBJECT *MultiInitObject(const MULTI_INIT *pInitTbl) { + OBJ_INIT obj_init; // object init table + OBJECT *pFirst, *pObj; // object pointers + FRAME *pFrame; // list of images for the multi-part object + + if (pInitTbl->hMulFrame) { + // we have a frame handle + pFrame = (FRAME *)LockMem(FROM_LE_32(pInitTbl->hMulFrame)); + + obj_init.hObjImg = READ_LE_UINT32(pFrame); // first objects shape + } else { // this must be a animation list for a NULL object + pFrame = NULL; + obj_init.hObjImg = 0; // first objects shape + } + + // init the object init table + obj_init.objFlags = (int)FROM_LE_32(pInitTbl->mulFlags); // all objects have same flags + obj_init.objID = (int)FROM_LE_32(pInitTbl->mulID); // all objects have same ID + obj_init.objX = (int)FROM_LE_32(pInitTbl->mulX); // all objects have same X ani pos + obj_init.objY = (int)FROM_LE_32(pInitTbl->mulY); // all objects have same Y ani pos + obj_init.objZ = (int)FROM_LE_32(pInitTbl->mulZ); // all objects have same Z pos + + // create and init the first object + pObj = pFirst = InitObject(&obj_init); + + if (pFrame) { + // if we have any animation frames + + pFrame++; + + while (READ_LE_UINT32(pFrame) != 0) { + // set next objects shape + obj_init.hObjImg = READ_LE_UINT32(pFrame); + + // create next object and link to previous + pObj = pObj->pSlave = InitObject(&obj_init); + + pFrame++; + } + } + + // null end of list for final object + pObj->pSlave = NULL; + + // return master object + return pFirst; +} + +/** + * Inserts the multi-part object onto the specified object list. + * @param pObjList List to insert multi-part object onto +* @param pInsObj Head of multi-part object to insert + + */ + +void MultiInsertObject(OBJECT *pObjList, OBJECT *pInsObj) { + // validate object pointer + assert(pInsObj >= objectList && pInsObj <= objectList + NUM_OBJECTS - 1); + + // for all the objects that make up this multi-part + do { + // add next part to the specified list + InsertObject(pObjList, pInsObj); + + // next obj in list + pInsObj = pInsObj->pSlave; + } while (pInsObj != NULL); +} + +/** + * Deletes all the pieces of a multi-part object from the + * specified object list. + * @param pObjList List to delete multi-part object from + * @param pMultiObj Multi-part object to be deleted + */ + +void MultiDeleteObject(OBJECT *pObjList, OBJECT *pMultiObj) { + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + // for all the objects that make up this multi-part + do { + // delete object + DelObject(pObjList, pMultiObj); + + // next obj in list + pMultiObj = pMultiObj->pSlave; + } + while (pMultiObj != NULL); +} + +/** + * Hides a multi-part object by giving each object a "NullImage" + * image pointer. + * @param pMultiObj Multi-part object to be hidden + */ + +void MultiHideObject(OBJECT *pMultiObj) { + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + // set master shape to null animation frame + pMultiObj->hShape = 0; + + // change all objects + MultiReshape(pMultiObj); +} + +/** + * Horizontally flip a multi-part object. + * @param pFlipObj Head of multi-part object to flip + */ + +void MultiHorizontalFlip(OBJECT *pFlipObj) { + // validate object pointer + assert(pFlipObj >= objectList && pFlipObj <= objectList + NUM_OBJECTS - 1); + + // for all the objects that make up this multi-part + do { + // horizontally flip the next part + AnimateObjectFlags(pFlipObj, pFlipObj->flags ^ DMA_FLIPH, + pFlipObj->hImg); + + // next obj in list + pFlipObj = pFlipObj->pSlave; + } while (pFlipObj != NULL); +} + +/** + * Vertically flip a multi-part object. + * @param pFlipObj Head of multi-part object to flip + */ + +void MultiVerticalFlip(OBJECT *pFlipObj) { + // validate object pointer + assert(pFlipObj >= objectList && pFlipObj <= objectList + NUM_OBJECTS - 1); + + // for all the objects that make up this multi-part + do { + // vertically flip the next part + AnimateObjectFlags(pFlipObj, pFlipObj->flags ^ DMA_FLIPV, + pFlipObj->hImg); + + // next obj in list + pFlipObj = pFlipObj->pSlave; + } + while (pFlipObj != NULL); +} + +/** + * Adjusts the coordinates of a multi-part object. The adjustments + * take into account the orientation of the object. + * @param pMultiObj Multi-part object to be adjusted + * @param deltaX X adjustment + * @param deltaY Y adjustment + */ + +void MultiAdjustXY(OBJECT *pMultiObj, int deltaX, int deltaY) { + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + if (deltaX == 0 && deltaY == 0) + return; // ignore no change + + if (pMultiObj->flags & DMA_FLIPH) { + // image is flipped horizontally - flip the x direction + deltaX = -deltaX; + } + + if (pMultiObj->flags & DMA_FLIPV) { + // image is flipped vertically - flip the y direction + deltaY = -deltaY; + } + + // for all the objects that make up this multi-part + do { + // signal a change in the object + pMultiObj->flags |= DMA_CHANGED; + + // adjust the x position + pMultiObj->xPos += intToFrac(deltaX); + + // adjust the y position + pMultiObj->yPos += intToFrac(deltaY); + + // next obj in list + pMultiObj = pMultiObj->pSlave; + + } while (pMultiObj != NULL); +} + +/** + * Moves all the pieces of a multi-part object by the specified + * amount. Does not take into account the objects orientation. + * @param pMultiObj Multi-part object to be adjusted + * @param deltaX X movement + * @param deltaY Y movement + */ + +void MultiMoveRelXY(OBJECT *pMultiObj, int deltaX, int deltaY) { + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + if (deltaX == 0 && deltaY == 0) + return; // ignore no change + + // for all the objects that make up this multi-part + do { + // signal a change in the object + pMultiObj->flags |= DMA_CHANGED; + + // adjust the x position + pMultiObj->xPos += intToFrac(deltaX); + + // adjust the y position + pMultiObj->yPos += intToFrac(deltaY); + + // next obj in list + pMultiObj = pMultiObj->pSlave; + + } while (pMultiObj != NULL); +} + +/** + * Sets the x & y anim position of all pieces of a multi-part object. + * @param pMultiObj Multi-part object whose position is to be changed + * @param newAniX New x animation position + * @param newAniY New y animation position + */ + +void MultiSetAniXY(OBJECT *pMultiObj, int newAniX, int newAniY) { + int curAniX, curAniY; // objects current animation position + + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + // get master objects current animation position + GetAniPosition(pMultiObj, &curAniX, &curAniY); + + // calc difference between current and new positions + newAniX -= curAniX; + newAniY -= curAniY; + + // move all pieces by the difference + MultiMoveRelXY(pMultiObj, newAniX, newAniY); +} + +/** + * Sets the x anim position of all pieces of a multi-part object. + * @param pMultiObj Multi-part object whose x position is to be changed + * @param newAniX New x animation position + */ + +void MultiSetAniX(OBJECT *pMultiObj, int newAniX) { + int curAniX, curAniY; // objects current animation position + + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + // get master objects current animation position + GetAniPosition(pMultiObj, &curAniX, &curAniY); + + // calc x difference between current and new positions + newAniX -= curAniX; + curAniY = 0; + + // move all pieces by the difference + MultiMoveRelXY(pMultiObj, newAniX, curAniY); +} + +/** + * Sets the y anim position of all pieces of a multi-part object. + * @param pMultiObj Multi-part object whose x position is to be changed + * @param newAniX New y animation position + */ + +void MultiSetAniY(OBJECT *pMultiObj, int newAniY) { + int curAniX, curAniY; // objects current animation position + + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + // get master objects current animation position + GetAniPosition(pMultiObj, &curAniX, &curAniY); + + // calc y difference between current and new positions + curAniX = 0; + newAniY -= curAniY; + + // move all pieces by the difference + MultiMoveRelXY(pMultiObj, curAniX, newAniY); +} + +/** + * Sets the Z position of all pieces of a multi-part object. + * @param pMultiObj Multi-part object to be adjusted + * @param newZ New Z order + */ + +void MultiSetZPosition(OBJECT *pMultiObj, int newZ) { + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + // for all the objects that make up this multi-part + do { + // signal a change in the object + pMultiObj->flags |= DMA_CHANGED; + + // set the new z position + pMultiObj->zPos = newZ; + + // next obj in list + pMultiObj = pMultiObj->pSlave; + } + while (pMultiObj != NULL); +} + +/** + * Reshape a multi-part object. + * @param pMultiObj Multi-part object to re-shape + */ + +void MultiReshape(OBJECT *pMultiObj) { + SCNHANDLE hFrame; + + // validate object pointer + assert(pMultiObj >= objectList && pMultiObj <= objectList + NUM_OBJECTS - 1); + + // get objects current anim frame + hFrame = pMultiObj->hShape; + + if (hFrame != 0 && hFrame != pMultiObj->hMirror) { + // a valid shape frame which is different from previous + + // get pointer to frame + const FRAME *pFrame = (const FRAME *)LockMem(hFrame); + + // update previous + pMultiObj->hMirror = hFrame; + + while (READ_LE_UINT32(pFrame) != 0 && pMultiObj != NULL) { + // a normal image - update the current object with this image + AnimateObject(pMultiObj, READ_LE_UINT32(pFrame)); + + // move to next image for this frame + pFrame++; + + // move to next part of object + pMultiObj = pMultiObj->pSlave; + } + + // null the remaining object parts + while (pMultiObj != NULL) { + // set a null image for this object part + AnimateObject(pMultiObj, 0); + + // move to next part of object + pMultiObj = pMultiObj->pSlave; + } + } else if (hFrame == 0) { + // update previous + pMultiObj->hMirror = hFrame; + + // null all the object parts + while (pMultiObj != NULL) { + // set a null image for this object part + AnimateObject(pMultiObj, 0); + + // move to next part of object + pMultiObj = pMultiObj->pSlave; + } + } +} + +/** + * Returns the left-most point of a multi-part object. + * @param pMulti Multi-part object + */ + +int MultiLeftmost(OBJECT *pMulti) { + int left; + + // validate object pointer + assert(pMulti >= objectList && pMulti <= objectList + NUM_OBJECTS - 1); + + // init leftmost point to first object + left = fracToInt(pMulti->xPos); + + // for all the objects in this multi + while ((pMulti = pMulti->pSlave) != NULL) { + if (pMulti->hImg != 0) { + // non null object part + + if (fracToInt(pMulti->xPos) < left) + // this object is further left + left = fracToInt(pMulti->xPos); + } + } + + // return left-most point + return left; +} + +/** + * Returns the right-most point of a multi-part object. + * @param pMulti Multi-part object + */ + +int MultiRightmost(OBJECT *pMulti) { + int right; + + // validate object pointer + assert(pMulti >= objectList && pMulti <= objectList + NUM_OBJECTS - 1); + + // init right-most point to first object + right = fracToInt(pMulti->xPos) + pMulti->width; + + // for all the objects in this multi + while ((pMulti = pMulti->pSlave) != NULL) { + if (pMulti->hImg != 0) { + // non null object part + + if (fracToInt(pMulti->xPos) + pMulti->width > right) + // this object is further right + right = fracToInt(pMulti->xPos) + pMulti->width; + } + } + + // return right-most point + return right - 1; +} + +/** + * Returns the highest point of a multi-part object. + * @param pMulti Multi-part object + */ + +int MultiHighest(OBJECT *pMulti) { + int highest; + + // validate object pointer + assert(pMulti >= objectList && pMulti <= objectList + NUM_OBJECTS - 1); + + // init highest point to first object + highest = fracToInt(pMulti->yPos); + + // for all the objects in this multi + while ((pMulti = pMulti->pSlave) != NULL) { + if (pMulti->hImg != 0) { + // non null object part + + if (fracToInt(pMulti->yPos) < highest) + // this object is higher + highest = fracToInt(pMulti->yPos); + } + } + + // return highest point + return highest; +} + +/** + * Returns the lowest point of a multi-part object. + * @param pMulti Multi-part object + */ + +int MultiLowest(OBJECT *pMulti) { + int lowest; + + // validate object pointer + assert(pMulti >= objectList && pMulti <= objectList + NUM_OBJECTS - 1); + + // init lowest point to first object + lowest = fracToInt(pMulti->yPos) + pMulti->height; + + // for all the objects in this multi + while ((pMulti = pMulti->pSlave) != NULL) { + if (pMulti->hImg != 0) { + // non null object part + + if (fracToInt(pMulti->yPos) + pMulti->height > lowest) + // this object is lower + lowest = fracToInt(pMulti->yPos) + pMulti->height; + } + } + + // return lowest point + return lowest - 1; +} + +} // end of namespace Tinsel |