DREAMWEB: Ported 'showrain' to C++

5 files changed, 57 insertions, 90 deletions

diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index e619dcae13..f25bff3995 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -2596,93 +2596,6 @@ failrain:
 	al = 0;
 }
 
-void DreamGenContext::showrain() {
-	STACK_CHECK;
-	ds = data.word(kMainsprites);
-	si = 6*58;
-	ax = ds.word(si+2);
-	si = ax;
-	_add(si, 2080);
-	bx = (0+(228*13)+32+60+(32*32)+(11*10*3)+768+768+768+(32*32)+(128*5)+(80*5)+(100*5)+(12*5)+(46*40)+(5*80)+(250*4)+(256*30));
-	es = data.word(kBuffers);
-	_cmp(es.byte(bx), 255);
-	if (flags.z())
-		return /* (nothunder) */;
-morerain:
-	es = data.word(kBuffers);
-	_cmp(es.byte(bx), 255);
-	if (flags.z())
-		goto finishrain;
-	al = es.byte(bx+1);
-	ah = 0;
-	_add(ax, data.word(kMapady));
-	_add(ax, data.word(kMapystart));
-	cx = 320;
-	_mul(cx);
-	cl = es.byte(bx);
-	ch = 0;
-	_add(ax, cx);
-	_add(ax, data.word(kMapadx));
-	_add(ax, data.word(kMapxstart));
-	di = ax;
-	cl = es.byte(bx+2);
-	ch = 0;
-	ax = es.word(bx+3);
-	dl = es.byte(bx+5);
-	dh = 0;
-	_sub(ax, dx);
-	_and(ax, 511);
-	es.word(bx+3) = ax;
-	_add(bx, 6);
-	push(si);
-	_add(si, ax);
-	es = data.word(kWorkspace);
-	ah = 0;
-	dx = 320-2;
-rainloop:
-	_lodsb();
-	_cmp(al, ah);
-	if (flags.z())
-		goto noplot;
-	_stosb();
-	_add(di, dx);
-	if (--cx)
-		goto rainloop;
-	si = pop();
-	goto morerain;
-noplot:
-	_add(di, 320-1);
-	if (--cx)
-		goto rainloop;
-	si = pop();
-	goto morerain;
-finishrain:
-	_cmp(data.word(kCh1blockstocopy), 0);
-	if (!flags.z())
-		return /* (nothunder) */;
-	_cmp(data.byte(kReallocation), 2);
-	if (!flags.z())
-		goto notlouisthund;
-	_cmp(data.byte(kBeenmugged), 1);
-	if (!flags.z())
-		return /* (nothunder) */;
-notlouisthund:
-	_cmp(data.byte(kReallocation), 55);
-	if (flags.z())
-		return /* (nothunder) */;
-	randomnum1();
-	_cmp(al, 1);
-	if (!flags.c())
-		return /* (nothunder) */;
-	al = 7;
-	_cmp(data.byte(kCh0playing), 6);
-	if (flags.z())
-		goto isthunder1;
-	al = 4;
-isthunder1:
-	playchannel1();
-}
-
 void DreamGenContext::liftnoise() {
 	STACK_CHECK;
 	_cmp(data.byte(kReallocation), 5);
@@ -20123,7 +20036,6 @@ void DreamGenContext::__dispatch_call(uint16 addr) {
 		case addr_initrain: initrain(); break;
 		case addr_splitintolines: splitintolines(); break;
 		case addr_getblockofpixel: getblockofpixel(); break;
-		case addr_showrain: showrain(); break;
 		case addr_backobject: backobject(); break;
 		case addr_liftnoise: liftnoise(); break;
 		case addr_random: random(); break;
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index 3642627763..1995858a03 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -651,7 +651,6 @@ public:
 	static const uint16 addr_random = 0xc17c;
 	static const uint16 addr_liftnoise = 0xc178;
 	static const uint16 addr_backobject = 0xc170;
-	static const uint16 addr_showrain = 0xc16c;
 	static const uint16 addr_getblockofpixel = 0xc168;
 	static const uint16 addr_splitintolines = 0xc164;
 	static const uint16 addr_initrain = 0xc160;
@@ -1493,7 +1492,7 @@ public:
 	void disablesoundint();
 	void checkifset();
 	void showallex();
-	void showrain();
+	//void showrain();
 	void openpoolboss();
 	void buttontwo();
 	//void usetimedtext();
diff --git a/engines/dreamweb/sprite.cpp b/engines/dreamweb/sprite.cpp
index 3e9914a71f..42c1b70d3a 100644
--- a/engines/dreamweb/sprite.cpp
+++ b/engines/dreamweb/sprite.cpp
@@ -567,5 +567,49 @@ void DreamGenContext::showreelframe(Reel *reel) {
 	showframe(ds.ptr(0, 0), x, y, frame, 8, &width, &height);
 }
 
+void DreamGenContext::showrain() {
+	ds = data.word(kMainsprites);
+	si = 6*58;
+	ax = ds.word(si+2);
+	si = ax + 2080;
+	es = data.word(kBuffers);
+	Rain *rain = (Rain *)es.ptr(kRainlist, 0);
+	if (rain->x == 255)
+		return;
+	while (true) {
+		if (rain->x == 255) {
+			if (data.word(kCh1blockstocopy) != 0)
+				return;
+			if ((data.byte(kReallocation) == 2) && (data.byte(kBeenmugged) != 1))
+					return;
+			if (data.byte(kReallocation) == 55)
+				return;
+			randomnum1();
+			if (al >= 1)
+				return;
+			if (data.byte(kCh0playing) != 6)
+				al = 4;
+			else
+				al = 7;
+			playchannel1();
+			return;
+		}
+		uint16 y = rain->y + data.word(kMapady) + data.word(kMapystart);
+		uint16 x = rain->x + data.word(kMapadx) + data.word(kMapxstart);
+		uint16 size = rain->size;
+		ax = ((uint16)(rain->w3() - rain->b5)) & 511;
+		rain->setW3(ax);
+		++rain;
+		const uint8 *src = ds.ptr(si, 0) + ax;
+		uint8 *dst = workspace() + y * 320 + x;
+		for(uint16 i = 0; i < size; ++i) {
+			uint8 v = src[i];
+			if (v != 0)
+				*dst = v;
+			dst += 320-1;
+		}
+	}
+}
+
 } /*namespace dreamgen */
 
diff --git a/engines/dreamweb/structs.h b/engines/dreamweb/structs.h
index a54c42d79d..a567384c00 100644
--- a/engines/dreamweb/structs.h
+++ b/engines/dreamweb/structs.h
@@ -121,3 +121,14 @@ struct Room {
 	uint8 b31;
 };
 
+struct Rain {
+	uint8 x;
+	uint8 y;
+	uint8 size;
+	uint8 w3_lo;
+	uint8 w3_hi;
+	uint16 w3() const { return READ_LE_UINT16(&w3_lo); }
+	void setW3(uint16 v) { WRITE_LE_UINT16(&w3_lo, v); }
+	uint8 b5;
+};
+
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index 466a486e7b..635d6c733a 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -111,5 +111,6 @@
 	void dealwithspecial();
 	void zoom();
 	void crosshair();
+	void showrain();