diff options
Diffstat (limited to 'engines/tsage/core.cpp')
-rw-r--r-- | engines/tsage/core.cpp | 93 |
1 files changed, 86 insertions, 7 deletions
diff --git a/engines/tsage/core.cpp b/engines/tsage/core.cpp index 26b669f0b0..e56cadb68a 100644 --- a/engines/tsage/core.cpp +++ b/engines/tsage/core.cpp @@ -3148,9 +3148,20 @@ void WalkRegions::clear() { void WalkRegions::load(int sceneNum) { clear(); - _resNum = sceneNum; - byte *regionData = _resourceManager->getResource(RES_WALKRGNS, sceneNum, 1, true); + + if (_vm->getFeatures() & GF_ALT_REGIONS) { + loadRevised(); + } else { + loadOriginal(); + } +} + +/** + * This version handles loading walk regions for Ringworld floppy version and Demo #1 + */ +void WalkRegions::loadOriginal() { + byte *regionData = _resourceManager->getResource(RES_WALKRGNS, _resNum, 1, true); if (!regionData) { // No data, so return _resNum = -1; @@ -3161,7 +3172,7 @@ void WalkRegions::load(int sceneNum) { int dataSize; // Load the field 18 list - dataP = _resourceManager->getResource(RES_WALKRGNS, sceneNum, 2); + dataP = _resourceManager->getResource(RES_WALKRGNS, _resNum, 2); dataSize = _vm->_memoryManager.getSize(dataP); assert(dataSize % 10 == 0); @@ -3175,7 +3186,7 @@ void WalkRegions::load(int sceneNum) { DEALLOCATE(dataP); // Load the idx list - dataP = _resourceManager->getResource(RES_WALKRGNS, sceneNum, 3); + dataP = _resourceManager->getResource(RES_WALKRGNS, _resNum, 3); dataSize = _vm->_memoryManager.getSize(dataP); assert(dataSize % 2 == 0); @@ -3186,7 +3197,7 @@ void WalkRegions::load(int sceneNum) { DEALLOCATE(dataP); // Load the secondary idx list - dataP = _resourceManager->getResource(RES_WALKRGNS, sceneNum, 4); + dataP = _resourceManager->getResource(RES_WALKRGNS, _resNum, 4); dataSize = _vm->_memoryManager.getSize(dataP); assert(dataSize % 2 == 0); @@ -3197,7 +3208,7 @@ void WalkRegions::load(int sceneNum) { DEALLOCATE(dataP); // Handle the loading of the actual regions themselves - dataP = _resourceManager->getResource(RES_WALKRGNS, sceneNum, 5); + dataP = _resourceManager->getResource(RES_WALKRGNS, _resNum, 5); byte *pWalkRegion = regionData + 16; byte *srcP = dataP; @@ -3210,7 +3221,7 @@ void WalkRegions::load(int sceneNum) { wr._idxListIndex = READ_LE_UINT32(pWalkRegion + 4); wr._idxList2Index = READ_LE_UINT32(pWalkRegion + 8); - // Region in the region data + // Read in the region data int size = READ_LE_UINT16(srcP); srcP += 2; wr.loadRegion(srcP, size); @@ -3224,6 +3235,74 @@ void WalkRegions::load(int sceneNum) { } /** + * This version handles loading walk regions for Ringworld CD version and Demo #2. Given it's the newer + * version, it may also be used by future game titles + */ +void WalkRegions::loadRevised() { + byte *regionData = _resourceManager->getResource(RES_WALKRGNS, _resNum, 2, true); + if (!regionData) { + // No data, so return + _resNum = -1; + return; + } + + byte *data1P = regionData + READ_LE_UINT32(regionData); + byte *data2P = regionData + READ_LE_UINT32(regionData + 4); + byte *data3P = regionData + READ_LE_UINT32(regionData + 8); + byte *data4P = regionData + READ_LE_UINT32(regionData + 12); + byte *regionOffset = regionData + 16; + int dataSize; + + // Load the field 18 list + dataSize = READ_LE_UINT32(regionData + 8) - READ_LE_UINT32(regionData + 4); + assert(dataSize % 10 == 0); + + byte *p = data2P; + for (int idx = 0; idx < (dataSize / 10); ++idx, p += 10) { + WRField18 rec; + rec.load(p); + _field18.push_back(rec); + } + + // Load the idx list + dataSize = READ_LE_UINT32(regionData + 12) - READ_LE_UINT32(regionData + 8); + assert(dataSize % 2 == 0); + + p = data3P; + for (int idx = 0; idx < (dataSize / 2); ++idx, p += 2) + _idxList.push_back(READ_LE_UINT16(p)); + + // Load the secondary idx list + dataSize = READ_LE_UINT32(regionData + 16) - READ_LE_UINT32(regionData + 12); + assert(dataSize % 2 == 0); + + p = data4P; + for (int idx = 0; idx < (dataSize / 2); ++idx, p += 2) + _idxList2.push_back(READ_LE_UINT16(p)); + + // Handle the loading of the actual regions themselves + byte *pWalkRegion = data1P + 16; + for (; (int16)READ_LE_UINT16(pWalkRegion) != -20000; pWalkRegion += 16, regionOffset += 4) { + WalkRegion wr; + byte *srcP = regionData + READ_LE_UINT32(regionOffset); + + // Set the Walk region specific fields + wr._pt.x = (int16)READ_LE_UINT16(pWalkRegion); + wr._pt.y = (int16)READ_LE_UINT16(pWalkRegion + 2); + wr._idxListIndex = READ_LE_UINT32(pWalkRegion + 4); + wr._idxList2Index = READ_LE_UINT32(pWalkRegion + 8); + + // Read in the region data + wr._regionId = 0; + wr.load(srcP); + + _regionList.push_back(wr); + } + + DEALLOCATE(regionData); +} + +/** * Returns the index of the walk region that contains the given point * @param pt Point to locate * @param indexList List of region indexes that should be ignored |