From 3427d07de07032b203f7aa02486b8073a65bca26 Mon Sep 17 00:00:00 2001
From: Bertrand Augereau
Date: Wed, 3 Aug 2011 18:48:43 +0200
Subject: DREAMWEB: 'doblocks' ported to C++

---
 devtools/tasmrecover/tasm-recover |  1 +
 engines/dreamweb/dreamgen.cpp     | 78 ---------------------------------------
 engines/dreamweb/dreamgen.h       |  3 +-
 engines/dreamweb/stubs.h          |  1 +
 engines/dreamweb/vgagrafx.cpp     | 42 +++++++++++++++++++++
 5 files changed, 45 insertions(+), 80 deletions(-)

diff --git a/devtools/tasmrecover/tasm-recover b/devtools/tasmrecover/tasm-recover
index 1c02417cfd..f665b7403b 100755
--- a/devtools/tasmrecover/tasm-recover
+++ b/devtools/tasmrecover/tasm-recover
@@ -98,6 +98,7 @@ generator = cpp(context, "DreamGen", blacklist = [
 	'loopchannel0',
 	'parseblaster',
 	'deltextline',
+	'doblocks',
 	], skip_output = [
 	# These functions are processed but not output
 	'dreamweb',
diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index 410abff178..83951bd19c 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -3117,83 +3117,6 @@ deloneloop:
 		goto deloneloop;
 }
 
-void DreamGenContext::doblocks() {
-	STACK_CHECK;
-	es = data.word(kWorkspace);
-	ax = data.word(kMapady);
-	cx = (320);
-	_mul(cx);
-	di = data.word(kMapadx);
-	_add(di, ax);
-	al = data.byte(kMapy);
-	ah = 0;
-	bx = (66);
-	_mul(bx);
-	bl = data.byte(kMapx);
-	bh = 0;
-	_add(ax, bx);
-	si = (0);
-	_add(si, ax);
-	cx = 10;
-loop120:
-	push(di);
-	push(cx);
-	cx = 11;
-loop124:
-	push(cx);
-	push(di);
-	ds = data.word(kMapdata);
-	_lodsb();
-	ds = data.word(kBackdrop);
-	push(si);
-	_cmp(al, 0);
-	if (flags.z())
-		goto zeroblock;
-	ah = al;
-	al = 0;
-	si = (0+192);
-	_add(si, ax);
-	bh = 14;
-	bh = 4;
-firstbitofblock:
-	_movsw(8);
-	_add(di, (320)-16);
-	_dec(bh);
-	if (!flags.z())
-		goto firstbitofblock;
-	bh = 12;
-loop125:
-	_movsw(8);
-	ax = 0x0dfdf;
-	_stosw(2);
-	_add(di, (320)-20);
-	_dec(bh);
-	if (!flags.z())
-		goto loop125;
-	_add(di, 4);
-	ax = 0x0dfdf;
-	_stosw(8);
-	_add(di, (320)-16);
-	_stosw(8);
-	_add(di, (320)-16);
-	_stosw(8);
-	_add(di, (320)-16);
-	_stosw(8);
-zeroblock:
-	si = pop();
-	di = pop();
-	cx = pop();
-	_add(di, 16);
-	if (--cx)
-		goto loop124;
-	_add(si, (66)-11);
-	cx = pop();
-	di = pop();
-	_add(di, (320)*16);
-	if (--cx)
-		goto loop120;
-}
-
 void DreamGenContext::transferinv() {
 	STACK_CHECK;
 	di = data.word(kExframepos);
@@ -19774,7 +19697,6 @@ void DreamGenContext::__dispatch_call(uint16 addr) {
 		case addr_vsync: vsync(); break;
 		case addr_doshake: doshake(); break;
 		case addr_delthisone: delthisone(); break;
-		case addr_doblocks: doblocks(); break;
 		case addr_transferinv: transferinv(); break;
 		case addr_transfermap: transfermap(); break;
 		case addr_fadedos: fadedos(); break;
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index 4abcd87719..9c89fead42 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -616,7 +616,6 @@ public:
 	static const uint16 addr_fadedos = 0xc248;
 	static const uint16 addr_transfermap = 0xc244;
 	static const uint16 addr_transferinv = 0xc240;
-	static const uint16 addr_doblocks = 0xc228;
 	static const uint16 addr_delthisone = 0xc214;
 	static const uint16 addr_doshake = 0xc20c;
 	static const uint16 addr_vsync = 0xc208;
@@ -1555,7 +1554,7 @@ public:
 	void locklightoff();
 	void wearwatch();
 	void runintroseq();
-	void doblocks();
+	//void doblocks();
 	void opensarters();
 	void allpalette();
 	void findormake();
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index d7f71aed5f..5ba83c3014 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -114,4 +114,5 @@
 	void crosshair();
 	void showrain();
 	void deltextline();
+	void doblocks();
 
diff --git a/engines/dreamweb/vgagrafx.cpp b/engines/dreamweb/vgagrafx.cpp
index a4f8d83117..ca86fc44b0 100644
--- a/engines/dreamweb/vgagrafx.cpp
+++ b/engines/dreamweb/vgagrafx.cpp
@@ -384,6 +384,48 @@ void DreamGenContext::clearwork() {
 	memset(workspace(), 0, 320*200);
 }
 
+void DreamGenContext::doblocks() {
+	uint16 dstOffset = data.word(kMapady) * 320 + data.word(kMapadx);
+	uint16 mapOffset = kMap + data.byte(kMapy) * kMapwidth + data.byte(kMapx);
+	ds = data.word(kMapdata);
+	const uint8 *mapData = ds.ptr(mapOffset, 0);
+	ds = data.word(kBackdrop);
+	const uint8 *blocks = ds.ptr(kBlocks, 0);
+	es = data.word(kWorkspace);
+	uint8 *dstBuffer = es.ptr(dstOffset, 0);
+
+	for (size_t i = 0; i < 10; ++i) {
+		for (size_t j = 0; j < 11; ++j) {
+			uint16 blockType = mapData[j];
+			if (blockType != 0) {
+				uint8 *dst = dstBuffer + i * 320 * 16 + j * 16;
+				const uint8 *block = blocks + blockType * 256;
+				for (size_t k = 0; k < 4; ++k) {
+					memcpy(dst, block, 16);
+					block += 16;
+					dst += 320;
+				}
+				for (size_t k = 0; k < 12; ++k) {
+					memcpy(dst, block, 16);
+					memset(dst + 16, 0xdf, 4);
+					block += 16;
+					dst += 320;
+				}
+				dst += 4;
+				ax = 0x0dfdf;
+				memset(dst, 0xdf, 16);
+				dst += 320;
+				memset(dst, 0xdf, 16);
+				dst += 320;
+				memset(dst, 0xdf, 16);
+				dst += 320;
+				memset(dst, 0xdf, 16);
+			}
+		}
+		mapData += kMapwidth;
+	}
+}
+
 void DreamGenContext::zoom() {
 	if (data.word(kWatchingtime) != 0)
 		return;
-- 
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