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-rw-r--r--engines/sci/engine/script.cpp154
-rw-r--r--engines/sci/engine/seg_manager.h1
2 files changed, 79 insertions, 76 deletions
diff --git a/engines/sci/engine/script.cpp b/engines/sci/engine/script.cpp
index 03234bea1d..800460bfc2 100644
--- a/engines/sci/engine/script.cpp
+++ b/engines/sci/engine/script.cpp
@@ -176,94 +176,95 @@ void SegManager::scriptInitialiseLocals(SegmentId segmentId) {
}
}
-void SegManager::scriptInitialiseObjectsSci0(SegmentId seg) {
+void SegManager::scriptInitialiseClasses(SegmentId seg) {
Script *scr = getScript(seg);
- bool oldScriptHeader = (getSciVersion() == SCI_VERSION_0_EARLY);
const byte *seeker = 0;
- int objType;
- reg_t addr;
-
- // The script is initialized in 2 passes.
- // Pass 1: creates a lookup table of all used classes
- // Pass 2: loads classes and objects
-
- for (uint16 pass = 0; pass <= 1; pass++) {
- uint16 objLength = 0;
- seeker = scr->_buf + (oldScriptHeader ? 2 : 0);
-
- do {
- objType = READ_SCI11ENDIAN_UINT16(seeker);
- if (!objType)
- break;
-
- objLength = READ_SCI11ENDIAN_UINT16(seeker + 2);
- seeker += 4; // skip header
- addr = make_reg(seg, seeker - scr->_buf);
-
- switch (objType) {
- case SCI_OBJ_OBJECT:
- case SCI_OBJ_CLASS:
- if (pass == 0 && objType == SCI_OBJ_CLASS) {
- int species = READ_SCI11ENDIAN_UINT16(seeker + 8); // SCRIPT_OBJECT_MAGIC_OFFSET
-
- if (species == (int)classTableSize()) {
- // Happens in the LSL2 demo
- warning("Applying workaround for an off-by-one invalid species access");
- resizeClassTable(classTableSize() + 1);
- } else if (species < 0 || species > (int)classTableSize()) {
- error("Invalid species %d(0x%x) not in interval "
- "[0,%d) while instantiating script at segment %d\n",
- species, species, classTableSize(),
- seg);
- return;
- }
-
- setClassOffset(species, make_reg(seg, seeker - scr->_buf + 8));
- } else if (pass == 1) {
- Object *obj = scr->scriptObjInit(addr);
- obj->initSpecies(this, addr);
-
- if (!obj->initBaseObject(this, addr)) {
- // Script 202 of KQ5 French has an invalid object
- warning("Failed to locate base object for object at %04X:%04X; skipping", PRINT_REG(addr));
- scr->scriptObjRemove(addr);
- }
- }
- break;
+ uint16 mult = 0;
+
+ if (getSciVersion() >= SCI_VERSION_1_1) {
+ seeker = scr->_heapStart + 4 + READ_SCI11ENDIAN_UINT16(scr->_heapStart + 2) * 2;
+ mult = 2;
+ } else {
+ seeker = scr->findBlock(SCI_OBJ_CLASS);
+ mult = 1;
+ }
- default:
- break;
- }
+ if (!seeker)
+ return;
+
+ while (true) {
+ // In SCI0-SCI1, this is the segment type. In SCI11, it's a marker (0x1234)
+ uint16 marker = READ_SCI11ENDIAN_UINT16(seeker);
+ bool isClass;
+ uint16 classpos = seeker - scr->_buf;
+ int16 species;
+
+ if (!marker)
+ break;
+
+ if (getSciVersion() >= SCI_VERSION_1_1) {
+ isClass = (READ_SCI11ENDIAN_UINT16(seeker + 14) & kInfoFlagClass); // -info- selector
+ species = READ_SCI11ENDIAN_UINT16(seeker + 10);
+ } else {
+ isClass = (marker == SCI_OBJ_CLASS);
+ species = READ_SCI11ENDIAN_UINT16(seeker + 12);
+ classpos += 12;
+ }
+
+ if (isClass) {
+ // WORKAROUND for an invalid species access in the demo of LSL2
+ if (g_sci->getGameId() == GID_LSL2 && g_sci->isDemo() && species == (int)classTableSize())
+ resizeClassTable(classTableSize() + 1);
- seeker += objLength - 4;
- } while (objType != 0 && (uint32)(seeker - scr->_buf) < scr->getScriptSize() - 2);
- } // for
+ if (species < 0 || species >= (int)classTableSize())
+ error("Invalid species %d(0x%x) not in interval [0,%d) while instantiating script %d\n",
+ species, species, classTableSize(), scr->_nr);
+
+ setClassOffset(species, make_reg(seg, classpos));
+ }
+
+ seeker += READ_SCI11ENDIAN_UINT16(seeker + 2) * mult;
+ }
}
-void SegManager::scriptInitialiseObjectsSci11(SegmentId seg) {
+void SegManager::scriptInitialiseObjectsSci0(SegmentId seg) {
Script *scr = getScript(seg);
- const byte *seeker = scr->_heapStart;
- uint16 entrySize = READ_SCI11ENDIAN_UINT16(seeker + 2) * 2;
- seeker += entrySize; // skip first entry
- seeker += 4; // skip header
+ bool oldScriptHeader = (getSciVersion() == SCI_VERSION_0_EARLY);
+ const byte *seeker = scr->_buf + (oldScriptHeader ? 2 : 0);
- while (READ_SCI11ENDIAN_UINT16(seeker) == SCRIPT_OBJECT_MAGIC_NUMBER) {
- if (READ_SCI11ENDIAN_UINT16(seeker + 14) & kInfoFlagClass) { // -info- selector
- int classpos = seeker - scr->_buf;
- int species = READ_SCI11ENDIAN_UINT16(seeker + 10);
-
- if (species < 0 || species >= (int)_classTable.size()) {
- error("Invalid species %d(0x%x) not in interval [0,%d) while instantiating script %d",
- species, species, _classTable.size(), scr->_nr);
- return;
+ do {
+ uint16 objType = READ_SCI11ENDIAN_UINT16(seeker);
+ if (!objType)
+ break;
+
+ switch (objType) {
+ case SCI_OBJ_OBJECT:
+ case SCI_OBJ_CLASS:
+ {
+ reg_t addr = make_reg(seg, seeker - scr->_buf + 4);
+ Object *obj = scr->scriptObjInit(addr);
+ obj->initSpecies(this, addr);
+
+ if (!obj->initBaseObject(this, addr)) {
+ // Script 202 of KQ5 French has an invalid object. This is non-fatal.
+ warning("Failed to locate base object for object at %04X:%04X; skipping", PRINT_REG(addr));
+ scr->scriptObjRemove(addr);
+ }
}
+ break;
- setClassOffset(species, make_reg(seg, classpos));
+ default:
+ break;
}
- seeker += READ_SCI11ENDIAN_UINT16(seeker + 2) * 2;
- }
- seeker = scr->_heapStart + 4 + READ_SCI11ENDIAN_UINT16(scr->_heapStart + 2) * 2;
+ seeker += READ_SCI11ENDIAN_UINT16(seeker + 2);
+ } while ((uint32)(seeker - scr->_buf) < scr->getScriptSize() - 2);
+}
+
+void SegManager::scriptInitialiseObjectsSci11(SegmentId seg) {
+ Script *scr = getScript(seg);
+ const byte *seeker = scr->_heapStart + 4 + READ_SCI11ENDIAN_UINT16(scr->_heapStart + 2) * 2;
+
while (READ_SCI11ENDIAN_UINT16(seeker) == SCRIPT_OBJECT_MAGIC_NUMBER) {
reg_t reg = make_reg(seg, seeker - scr->_buf);
Object *obj = scr->scriptObjInit(reg);
@@ -311,6 +312,7 @@ int script_instantiate(ResourceManager *resMan, SegManager *segMan, int scriptNu
scr->init(scriptNum, resMan);
scr->load(resMan);
segMan->scriptInitialiseLocals(segmentId);
+ segMan->scriptInitialiseClasses(segmentId);
if (getSciVersion() >= SCI_VERSION_1_1) {
segMan->scriptInitialiseObjectsSci11(segmentId);
diff --git a/engines/sci/engine/seg_manager.h b/engines/sci/engine/seg_manager.h
index 037f3f0819..1ed01e2c6b 100644
--- a/engines/sci/engine/seg_manager.h
+++ b/engines/sci/engine/seg_manager.h
@@ -426,6 +426,7 @@ public:
*/
reg_t findObjectByName(const Common::String &name, int index = -1);
+ void scriptInitialiseClasses(SegmentId seg);
void scriptInitialiseObjectsSci0(SegmentId seg);
void scriptInitialiseObjectsSci11(SegmentId seg);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 17:02:21 +0000