diff options
Diffstat (limited to 'engines/sci/engine/script_patches.cpp')
| -rw-r--r-- | engines/sci/engine/script_patches.cpp | 196 |
1 files changed, 195 insertions, 1 deletions
diff --git a/engines/sci/engine/script_patches.cpp b/engines/sci/engine/script_patches.cpp index ebb12a5f6b..bc119cc936 100644 --- a/engines/sci/engine/script_patches.cpp +++ b/engines/sci/engine/script_patches.cpp @@ -163,6 +163,7 @@ static const char *const selectorNameTable[] = { "state", // RAMA "getSubscriberObj", // RAMA "approachVerbs", // QFG4 + "changeState", // QFG4 "cue", // QFG4 "heading", // QFG4 "moveSpeed", // QFG4 @@ -257,6 +258,7 @@ enum ScriptPatcherSelectors { SELECTOR_state, SELECTOR_getSubscriberObj, SELECTOR_approachVerbs, + SELECTOR_changeState, SELECTOR_cue, SELECTOR_heading, SELECTOR_moveSpeed, @@ -9106,6 +9108,192 @@ static const uint16 qfg4CrestBookshelfMotionPatch[] = { PATCH_END }; +// In the crest bookshelf room (663) connected to the upper door of the +// bat-infested stairway, peering through the keyhole *always* reports bats. +// +// As you kill the bats, global plot flags are set. Normally flags 331-334 +// would be checked via proc0_4(). They're in a bitmask, among other flags, so +// we can check all simultaneously (0000000000011110). +// +// global[520] & 30 == 30 +// +// Patch 1: There was no space for this in the responsible method. Instead, we +// rewrite a different method that became obsolete after the crest bookshelf +// patch: sCloseSecretDoor::changeState(). +// +// Patch 2: We modify sPeepingTom to call our rewritten sCloseSecretDoor. This +// has two variants, toggled to match the detected edition with enablePatch() +// below. Aside from the patched lofsa value, they are identical. +// +// Requires patch: qfg4CrestBookshelf (CD or Floppy) +// Applies to at least: English CD, English floppy, German floppy +// Responsible method: sPeepingTom::changeState(1) in script 663 +// Fixes bug: #10789 +static const uint16 qfg4UpperPeerBatsSignature1[] = { + 0x87, 0x01, // lap param[1] + SIG_ADDTOOFFSET(+41), // ... + SIG_MAGICDWORD, + 0x4a, SIG_UINT16(0x0006), // send 6d + 0x35, 0x1e, // ldi 30d + 0x65, SIG_ADDTOOFFSET(+1), // aTop ticks + SIG_ADDTOOFFSET(+9), // ... + 0x38, SIG_SELECTOR16(setCycle), // pushi setCycle + SIG_END +}; + +static const uint16 qfg4UpperPeerBatsPatch1[] = { + 0x38, PATCH_SELECTOR16(say), // pushi say (decide the message as args are stacked up) + 0x39, 0x06, // pushi 6d + 0x7a, // push2 + 0x38, PATCH_UINT16(0x009b), // pushi 155d + + 0x39, 0x1e, // pushi 30d (stack up for eq) + 0x3c, // dup (stack up another for AND) + 0x80, PATCH_UINT16(0x0208), // lag global[520] (plot flags bitmask) + 0x12, // and + 0x1a, // eq? (Were all dead bat flags set?) + 0x2f, 0x04, // bt 4d [after this jmp] + 0x39, 0x1d, // pushi 29d (bat message) + 0x33, 0x02, // jmp 2d [after deciding message] + + 0x39, 0x1b, // pushi 27d (killed all bats, generic message) + + 0x78, // push1 + 0x76, // push0 (don't cue() afterward) + 0x38, PATCH_UINT16(0x0280), // pushi 640d + 0x81, 0x5b, // lag global[91] (gloryMessager) + 0x4a, PATCH_UINT16(0x0010), // send 16d + 0x48, // ret + 0x34, PATCH_UINT16(0x0000), // ldi 0 (erase 3 bytes to keep disasm aligned) + PATCH_END +}; + +// Applies to at least: English CD +static const uint16 qfg4UpperPeerBatsCDSignature2[] = { + 0x38, SIG_SELECTOR16(say), // pushi say + SIG_ADDTOOFFSET(+3), + SIG_MAGICDWORD, + 0x7a, // push2 + 0x38, SIG_UINT16(0x009b), // pushi 155d + 0x39, 0x1d, // pushi 29d (bat message) + SIG_ADDTOOFFSET(+7), + 0x4a, SIG_UINT16(0x0010), // send 16d (say: 2 155 29 1 self 640) + PATCH_END +}; + +static const uint16 qfg4UpperPeerBatsCDPatch2[] = { + 0x38, PATCH_SELECTOR16(changeState), // pushi changeState + 0x78, // push1 + 0x76, // push0 + 0x72, PATCH_UINT16(0x0176), // lofsa sCloseSecretDoor + 0x4a, PATCH_UINT16(0x0006), // send 6d (call the rewritten method) + 0x38, PATCH_SELECTOR16(cue), // pushi cue + 0x76, // push0 + 0x54, PATCH_UINT16(0x0004), // self 4d (self-cue) + 0x35, 0x00, // ldi 0 (waste 2 bytes) + 0x35, 0x00, // ldi 0 (waste 2 bytes) + PATCH_END +}; + +// Applies to at least: English floppy, German floppy +static const uint16 qfg4UpperPeerBatsFloppySignature2[] = { + 0x38, SIG_SELECTOR16(say), // pushi say + SIG_ADDTOOFFSET(+3), + SIG_MAGICDWORD, + 0x7a, // push2 + 0x38, SIG_UINT16(0x009b), // pushi 155d + 0x39, 0x1d, // pushi 29d (bat message) + SIG_ADDTOOFFSET(+7), + 0x4a, SIG_UINT16(0x0010), // send 16d (say: 2 155 29 1 self 640) + PATCH_END +}; + +static const uint16 qfg4UpperPeerBatsFloppyPatch2[] = { + 0x38, PATCH_SELECTOR16(changeState), // pushi changeState + 0x78, // push1 + 0x76, // push0 + 0x72, PATCH_UINT16(0x0160), // lofsa sCloseSecretDoor + 0x4a, PATCH_UINT16(0x0006), // send 6d (call the rewritten method) + 0x38, PATCH_SELECTOR16(cue), // pushi cue + 0x76, // push0 + 0x54, PATCH_UINT16(0x0004), // self 4d (self-cue) + 0x35, 0x00, // ldi 0 (waste 2 bytes) + 0x35, 0x00, // ldi 0 (waste 2 bytes) + PATCH_END +}; + +// In the room (644) connected to the lower door of the bat-infested stairway, +// peering through the keyhole *always* reports bats. +// +// As you kill the bats, global plot flags are set. Normally flags 331-334 +// would be checked via proc0_4(). They're in a bitmask, among other flags, so +// we can check all simultaneously (0000000000011110). +// +// global[520] & 30 == 30 +// +// Room 644 has an IF-ELSE deciding between largely redundant calls to +// gloryMessager::say(). We make room by combining them. +// +// Applies to at least: English CD, English floppy, German floppy +// Responsible method: sPeepingTom::changeState(1) in script 644 +// Fixes bug: #10789 +static const uint16 qfg4LowerPeerBatsSignature[] = { + SIG_MAGICDWORD, + 0x78, // push1 x (check if hero's near the left door) + 0x76, // push0 + 0x81, 0x00, // lag global[0] (hero) + 0x4a, SIG_UINT16(0x0004), // send 4d + 0x36, // push + 0x35, 0x3c, // ldi 60d + 0x22, // lt? + 0x31, 0x18, // bnt 24d [else right door w/ bats] + 0x38, SIG_SELECTOR16(say), // pushi say (left door, generic message) + SIG_ADDTOOFFSET(+14), // ... + 0x81, 0x5b, // lag global[91] (gloryMessager) + 0x4a, SIG_UINT16(0x0010), // send 16d (say: 2 155 27 1 self 640) + 0x33, SIG_ADDTOOFFSET(+1), // jmp [end the case] + SIG_ADDTOOFFSET(+22), // (right door, say(), 3rd arg is 29 for bat message) + 0x33, SIG_ADDTOOFFSET(+1), // jmp [end the case] + SIG_END +}; + +static const uint16 qfg4LowerPeerBatsPatch[] = { + 0x38, PATCH_SELECTOR16(say), // pushi say (decide the message as args are stacked up) + 0x39, 0x06, // pushi 6d + 0x7a, // push2 + 0x38, PATCH_UINT16(0x009b), // pushi 155d + + 0x78, // push1 x (check if left door) + 0x76, // push0 + 0x81, 0x00, // lag global[0] (hero) + 0x4a, PATCH_UINT16(0x0004), // send 4d + 0x36, // push + 0x35, 0x3c, // ldi 60d + 0x22, // lt? + 0x31, 0x04, // bnt 4d [after this jmp] + 0x39, 0x1b, // pushi 27d (left door, generic message) + 0x33, 0x10, // jmp 16d [after deciding message] + + 0x39, 0x1e, // pushi 30d (stack up for eq) + 0x3c, // dup (stack up another for AND) + 0x80, PATCH_UINT16(0x0208), // lag global[520] (plot flags bitmask) + 0x12, // and + 0x1a, // eq? (Were all dead bat flags set?) + 0x2f, 0x04, // bt 4d [after this jmp] + 0x39, 0x1d, // pushi 29d (right door, bat message) + 0x33, 0x02, // jmp 2d [after deciding message] + + 0x39, 0x1b, // pushi 27d (right door, killed all bats, generic message) + + 0x78, // push1 + 0x7c, // pushSelf + 0x38, PATCH_UINT16(0x0280), // pushi 640d + 0x81, 0x5b, // lag global[91] (gloryMessager) + 0x4a, PATCH_UINT16(0x0010), // send 16d + 0x33, PATCH_GETORIGINALBYTEADJUST(60, +7), // jmp [end the case] + PATCH_END +}; + // The castle's great hall (630) has a doorMat region that intermittently sends // hero back to the room they just left (barrel room) the instant they arrive. // @@ -10508,10 +10696,14 @@ static const SciScriptPatcherEntry qfg4Signatures[] = { { true, 643, "fix iron safe's east door sending hero west", 1, qfg4SafeDoorEastSignature, qfg4SafeDoorEastPatch }, { true, 643, "fix iron safe's door oil flags", 1, qfg4SafeDoorOilSignature, qfg4SafeDoorOilPatch }, { true, 644, "fix castle door open message for rogue", 2, qfg4StuckDoorSignature, qfg4StuckDoorPatch }, + { true, 644, "fix peer bats, lower door", 1, qfg4LowerPeerBatsSignature, qfg4LowerPeerBatsPatch }, { true, 645, "fix extraneous door sound in the castle", 1, qfg4DoubleDoorSoundSignature, qfg4DoubleDoorSoundPatch }, - { false, 663, "CD: fix crest bookshelf", 1, qfg4CrestBookshelfCDSignature, qfg4CrestBookshelfCDPatch }, + { false, 663, "CD: fix crest bookshelf", 1, qfg4CrestBookshelfCDSignature, qfg4CrestBookshelfCDPatch }, { false, 663, "Floppy: fix crest bookshelf", 1, qfg4CrestBookshelfFloppySignature, qfg4CrestBookshelfFloppyPatch }, { true, 663, "CD/Floppy: fix crest bookshelf motion", 1, qfg4CrestBookshelfMotionSignature, qfg4CrestBookshelfMotionPatch }, + { true, 663, "CD/Floppy: fix peer bats, upper door (1/2)", 1, qfg4UpperPeerBatsSignature1, qfg4UpperPeerBatsPatch1 }, + { false, 663, "CD: fix peer bats, upper door (2/2)", 1, qfg4UpperPeerBatsCDSignature2, qfg4UpperPeerBatsCDPatch2 }, + { false, 663, "Floppy: fix peer bats, upper door (2/2)", 1, qfg4UpperPeerBatsFloppySignature2, qfg4UpperPeerBatsFloppyPatch2 }, { true, 710, "fix tentacle wriggle cycler", 1, qfg4TentacleWriggleSignature, qfg4TentacleWrigglePatch }, { true, 710, "fix tentacle retraction for fighter", 1, qfg4PitRopeFighterSignature, qfg4PitRopeFighterPatch }, { true, 710, "fix tentacle retraction for mage (1/2)", 1, qfg4PitRopeMageSignature1, qfg4PitRopeMagePatch1 }, @@ -12370,9 +12562,11 @@ void ScriptPatcher::processScript(uint16 scriptNr, SciSpan<byte> scriptData) { // Similar signatures that patch with different addresses/offsets enablePatch(signatureTable, "CD: fix guild tunnel access (3/3)"); enablePatch(signatureTable, "CD: fix crest bookshelf"); + enablePatch(signatureTable, "CD: fix peer bats, upper door (2/2)"); } else { enablePatch(signatureTable, "Floppy: fix guild tunnel access (3/3)"); enablePatch(signatureTable, "Floppy: fix crest bookshelf"); + enablePatch(signatureTable, "Floppy: fix peer bats, upper door (2/2)"); } break; default: |