From d9e31be349b38313cc2be8cf68ec801494bac08b Mon Sep 17 00:00:00 2001
From: Willem Jan Palenstijn
Date: Sun, 4 Dec 2011 10:11:28 +0100
Subject: DREAMWEB: Convert 'readKey' and the keyboard buffer

---
 engines/dreamweb/dreamgen.cpp | 58 +++++++++++++++++++++----------------------
 engines/dreamweb/dreamgen.h   | 28 ++++++++++-----------
 engines/dreamweb/dreamweb.cpp |  3 +--
 engines/dreamweb/dreamweb.h   |  4 +++
 engines/dreamweb/stubs.cpp    | 30 +++++++++++-----------
 engines/dreamweb/stubs.h      |  1 +
 6 files changed, 62 insertions(+), 62 deletions(-)

(limited to 'engines')

diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index 26080eab41..2ae5cc5107 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -5228,14 +5228,14 @@ void DreamGenContext::getDestInfo() {
 	push(ax);
 	dx = data;
 	es = dx;
-	si = 2032;
+	si = 2016;
 	_add(si, ax);
 	cl = es.byte(si);
 	ax = pop();
 	push(cx);
 	dx = data;
 	es = dx;
-	si = 2048;
+	si = 2032;
 	_add(si, ax);
 	ax = pop();
 }
@@ -5412,7 +5412,7 @@ clearedlocations:
 	bx = ax;
 	dx = data;
 	es = dx;
-	_add(bx, 2032);
+	_add(bx, 2016);
 	es.byte(bx) = 0;
 }
 
@@ -5527,7 +5527,7 @@ void DreamGenContext::delChar() {
 	si = data.word(kCurpos);
 	_add(si, si);
 	es = cs;
-	_add(si, 2066);
+	_add(si, 2050);
 	es.byte(si) = 0;
 	al = es.byte(si+1);
 	ah = 0;
@@ -5554,7 +5554,7 @@ void DreamGenContext::execCommand() {
 	es = cs;
 	bx = offset_comlist;
 	ds = cs;
-	si = 2066;
+	si = 2050;
 	al = ds.byte(si);
 	_cmp(al, 0);
 	if (!flags.z())
@@ -5749,7 +5749,7 @@ notyetassigned:
 	push(bx);
 	_add(bx, 2);
 	ds = cs;
-	si = 2066;
+	si = 2050;
 checkpass:
 	_lodsw();
 	ah = es.byte(bx);
@@ -6077,7 +6077,7 @@ void DreamGenContext::parser() {
 	al = '=';
 	_stosb();
 	ds = cs;
-	si = 2066;
+	si = 2050;
 notspace1:
 	_lodsw();
 	_cmp(al, 32);
@@ -9701,7 +9701,7 @@ void DreamGenContext::getNamePos() {
 	_mul(cx);
 	dx = data;
 	es = dx;
-	bx = 2200;
+	bx = 2184;
 	_add(bx, ax);
 	al = data.byte(kCursorpos);
 	ah = 0;
@@ -9855,7 +9855,7 @@ void DreamGenContext::showNames() {
 	STACK_CHECK;
 	dx = data;
 	es = dx;
-	si = 2200+1;
+	si = 2184+1;
 	di = (60)+21;
 	bx = (52)+10;
 	cl = 0;
@@ -10375,7 +10375,7 @@ void DreamGenContext::clearChanges() {
 	di = 0;
 	_stosw(cx, true);
 	es = cs;
-	di = 2032;
+	di = 2016;
 	al = 1;
 	_stosb(2);
 	al = 0;
@@ -11387,15 +11387,15 @@ void DreamGenContext::__start() {
 		//0x07a0:         . .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 
 		//0x07b0: .... .... .... ....
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
-		//0x07c0: .... .... .... ....
 		0x44, 0x3a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
-		//0x07d0: D:.. .... .... ....
+		//0x07c0: D:.. .... .... ....
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
-		//0x07e0: .... .... .... ....
+		//0x07d0: .... .... .... ....
 		0x01, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
-		//0x07f0: .... .... .... ....
+		//0x07e0: .... .... .... ....
 		0x05, 0x00, 0x03, 0x02, 0x04, 0x01, 0x0a, 0x09, 0x08, 0x06, 0x0b, 0x04, 0x07, 0x07, 0x00, 0x00, 
+		//0x07f0: .... .... .... ....
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
 		//0x0800: .... .... .... ....
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
 		//0x0810: .... .... .... ....
@@ -11411,34 +11411,32 @@ void DreamGenContext::__start() {
 		//0x0860: .... .... .... ....
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
 		//0x0870: .... .... .... ....
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
-		//0x0880: .... .... .... ....
 		0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x02, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 
-		//0x0890: .... .... .... ....
+		//0x0880: .... .... .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 
-		//0x08a0: .... .... .... ....
+		//0x0890: .... .... .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x00, 0x01, 0x01, 0x01, 0x01, 
-		//0x08b0: .... .... .... ....
+		//0x08a0: .... .... .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x00, 0x01, 0x01, 0x01, 
-		//0x08c0: .... .... .... ....
+		//0x08b0: .... .... .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x00, 0x01, 0x01, 
-		//0x08d0: .... .... .... ....
+		//0x08c0: .... .... .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x00, 0x01, 
-		//0x08e0: .... .... .... ....
+		//0x08d0: .... .... .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x00, 
-		//0x08f0: .... .... .... ....
+		//0x08e0: .... .... .... ....
 		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x44, 
-		//0x0900: .... .... .... ...D
+		//0x08f0: .... .... .... ...D
 		0x52, 0x45, 0x41, 0x4d, 0x57, 0x45, 0x42, 0x2e, 0x44, 0x30, 0x30, 0x00, 0x44, 0x52, 0x45, 0x41, 
-		//0x0910: REAM WEB. D00. DREA
+		//0x0900: REAM WEB. D00. DREA
 		0x4d, 0x57, 0x45, 0x42, 0x2e, 0x44, 0x30, 0x31, 0x00, 0x44, 0x52, 0x45, 0x41, 0x4d, 0x57, 0x45, 
-		//0x0920: MWEB .D01 .DRE AMWE
+		//0x0910: MWEB .D01 .DRE AMWE
 		0x42, 0x2e, 0x44, 0x30, 0x32, 0x00, 0x44, 0x52, 0x45, 0x41, 0x4d, 0x57, 0x45, 0x42, 0x2e, 0x44, 
-		//0x0930: B.D0 2.DR EAMW EB.D
+		//0x0920: B.D0 2.DR EAMW EB.D
 		0x30, 0x33, 0x00, 0x44, 0x52, 0x45, 0x41, 0x4d, 0x57, 0x45, 0x42, 0x2e, 0x44, 0x30, 0x34, 0x00, 
-		//0x0940: 03.D REAM WEB. D04.
+		//0x0930: 03.D REAM WEB. D04.
 		0x44, 0x52, 0x45, 0x41, 0x4d, 0x57, 0x45, 0x42, 0x2e, 0x44, 0x30, 0x35, 0x00, 0x44, 0x52, 0x45, 
-		//0x0950: DREA MWEB .D05 .DRE
+		//0x0940: DREA MWEB .D05 .DRE
 		0x41, 0x4d, 0x57, 0x45, 0x42, 0x2e, 0x44, 0x30, 0x36, 0x00, 0x00, 0x00, 0x00, };
 	ds.assign(src, src + sizeof(src));
 	dreamweb(); 
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index 25f72c999a..8fa0c25b70 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -39,7 +39,7 @@ public:
 	static const uint16 offset_commandline = 0x077f;
 	static const uint16 offset_money2poke = 0x06bc;
 	static const uint16 offset_keys = 0x0623;
-	static const uint16 offset_keybuffer = 0x07c0;
+	static const uint16 offset_money1poke = 0x06b7;
 	static const uint16 offset_diarylist = 0x06bf;
 	static const uint16 offset_decidelist = 0x0742;
 	static const uint16 offset_operand1 = 0x068d;
@@ -49,7 +49,6 @@ public:
 	static const uint16 offset_comlist = 0x05e7;
 	static const uint16 offset_quitlist = 0x0593;
 	static const uint16 offset_speechfilename = 0x076c;
-	static const uint16 offset_money1poke = 0x06b7;
 	static const uint16 offset_talklist = 0x0573;
 	static const uint16 offset_openchangesize = 0x0571;
 	static const uint16 offset_destlist = 0x05a9;
@@ -464,16 +463,16 @@ public:
 	static const uint16 kTitle7graphics = 1367;
 	static const uint16 kPalettescreen = 1380;
 	static const uint16 kCurrentfile = 1705;
-	static const uint16 kRoomscango = 2032;
-	static const uint16 kRoompics = 2048;
-	static const uint16 kOplist = 2063;
-	static const uint16 kInputline = 2066;
-	static const uint16 kPresslist = 2194;
-	static const uint16 kSavenames = 2200;
-	static const uint16 kSavefiles = 2319;
-	static const uint16 kQuitrequested = 2410;
-	static const uint16 kSubtitles = 2411;
-	static const uint16 kForeignrelease = 2412;
+	static const uint16 kRoomscango = 2016;
+	static const uint16 kRoompics = 2032;
+	static const uint16 kOplist = 2047;
+	static const uint16 kInputline = 2050;
+	static const uint16 kPresslist = 2178;
+	static const uint16 kSavenames = 2184;
+	static const uint16 kSavefiles = 2303;
+	static const uint16 kQuitrequested = 2394;
+	static const uint16 kSubtitles = 2395;
+	static const uint16 kForeignrelease = 2396;
 	static const uint16 kBlocktextdat = (0);
 	static const uint16 kPersonframes = (0);
 	static const uint16 kDebuglevel1 = (0);
@@ -577,9 +576,8 @@ public:
 	void clearBuffers();
 	void showSymbol();
 	void getObTextStart();
-	void dumpDiaryKeys();
+	void decide();
 	void getRidOfReels();
-	void readKey();
 	void louis();
 	void entryTexts();
 	void checkInput();
@@ -658,7 +656,7 @@ public:
 	void runTap();
 	void talk();
 	void useBalcony();
-	void decide();
+	void dumpDiaryKeys();
 	void disableSoundInt();
 	void priestText();
 	void openPoolBoss();
diff --git a/engines/dreamweb/dreamweb.cpp b/engines/dreamweb/dreamweb.cpp
index 09e6a15458..a9cc1a9653 100644
--- a/engines/dreamweb/dreamweb.cpp
+++ b/engines/dreamweb/dreamweb.cpp
@@ -290,7 +290,6 @@ uint DreamWebEngine::readFromSaveFile(uint8 *data, uint size) {
 
 void DreamWebEngine::keyPressed(uint16 ascii) {
 	debug(2, "key pressed = %04x", ascii);
-	uint8* keybuf = _context.data.ptr(DreamGen::DreamGenContext::offset_keybuffer, 16);
 	uint16 in = (_context.data.word(DreamGen::DreamGenContext::kBufferin) + 1) & 0x0f;
 	uint16 out = _context.data.word(DreamGen::DreamGenContext::kBufferout);
 	if (in == out) {
@@ -298,7 +297,7 @@ void DreamWebEngine::keyPressed(uint16 ascii) {
 		return;
 	}
 	_context.data.word(DreamGen::DreamGenContext::kBufferin) = in;
-	keybuf[in] = ascii;
+	DreamGen::g_keyBuffer[in] = ascii;
 }
 
 void DreamWebEngine::mouseCall(uint16 *x, uint16 *y, uint16 *state) {
diff --git a/engines/dreamweb/dreamweb.h b/engines/dreamweb/dreamweb.h
index 2d59a87ea3..e0a55891ee 100644
--- a/engines/dreamweb/dreamweb.h
+++ b/engines/dreamweb/dreamweb.h
@@ -49,6 +49,10 @@ const uint16 addr_mainman = 0xc138;
 // Output of Bresenham
 extern Common::Point g_lineData[200];
 
+// Keyboard buffer. data.word(kBufferin) and data.word(kBufferout) are indexes
+// into this, making it a ring buffer
+extern uint8 g_keyBuffer[16];
+
 }
 
 namespace DreamWeb {
diff --git a/engines/dreamweb/stubs.cpp b/engines/dreamweb/stubs.cpp
index 92053ca5af..dd1f777cda 100644
--- a/engines/dreamweb/stubs.cpp
+++ b/engines/dreamweb/stubs.cpp
@@ -26,6 +26,10 @@
 
 namespace DreamGen {
 
+// Keyboard buffer. data.word(kBufferin) and data.word(kBufferout) are indexes
+// into this, making it a ring buffer
+uint8 g_keyBuffer[16];
+
 const Room g_roomData[] = {
 	{ "DREAMWEB.R00", // Ryan's apartment
 	  5,255,33,10,
@@ -3057,21 +3061,17 @@ void DreamGenContext::atmospheres() {
 }
 
 void DreamGenContext::readKey() {
-	STACK_CHECK;
-	bx = data.word(kBufferout);
-	_cmp(bx, data.word(kBufferin));
-	if (flags.z())
-		goto nokey;
-	_inc(bx);
-	_and(bx, 15);
-	data.word(kBufferout) = bx;
-	di = offset_keybuffer;
-	_add(di, bx);
-	al = cs.byte(di);
-	data.byte(kCurrentkey) = al;
-	return;
-nokey:
-	data.byte(kCurrentkey) = 0;
+	uint16 bufOut = data.word(kBufferout);
+
+	if (bufOut == data.word(kBufferin)) {
+		// empty buffer
+		data.byte(kCurrentkey) = 0;
+		return;
+	}
+
+	bufOut = (bufOut + 1) & 15; // The buffer has size 16
+	data.byte(kCurrentkey) = g_keyBuffer[bufOut];
+	data.word(kBufferout) = bufOut;
 }
 
 
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index 70263fae94..6414a4e914 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -430,4 +430,5 @@
 	void loadNews();
 	void loadCart();
 	void soundOnReels();
+	void readKey();
 
-- 
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