From 4e39a41e6218c7206e706734eb608e9706e2678a Mon Sep 17 00:00:00 2001
From: Bertrand Augereau
Date: Wed, 3 Aug 2011 12:24:06 +0200
Subject: DREAWMEB: Ported 'zoom' to C++

---
 engines/dreamweb/dreamgen.cpp | 51 -------------------------------------------
 engines/dreamweb/dreamgen.h   |  3 +--
 engines/dreamweb/stubs.h      |  1 +
 engines/dreamweb/vgagrafx.cpp | 28 ++++++++++++++++++++++++
 4 files changed, 30 insertions(+), 53 deletions(-)

(limited to 'engines/dreamweb')

diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index a43816153e..99ad3b36a9 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -3160,56 +3160,6 @@ void DreamGenContext::createpanel2() {
 	showframe();
 }
 
-void DreamGenContext::zoom() {
-	STACK_CHECK;
-	_cmp(data.word(kWatchingtime), 0);
-	if (!flags.z())
-		return /* (inwatching) */;
-	_cmp(data.byte(kZoomon), 1);
-	if (flags.z())
-		goto zoomswitch;
-	return;
-zoomswitch:
-	_cmp(data.byte(kCommandtype), 199);
-	if (flags.c())
-		goto zoomit;
-	putunderzoom();
-	return;
-zoomit:
-	ax = data.word(kOldpointery);
-	_sub(ax, 9);
-	cx = (320);
-	_mul(cx);
-	_add(ax, data.word(kOldpointerx));
-	_sub(ax, 11);
-	si = ax;
-	ax = (132)+4;
-	cx = (320);
-	_mul(cx);
-	_add(ax, (8)+5);
-	di = ax;
-	es = data.word(kWorkspace);
-	ds = data.word(kWorkspace);
-	cx = 20;
-zoomloop:
-	push(cx);
-	cx = 23;
-zoomloop2:
-	_lodsb();
-	ah = al;
-	_stosw();
-	es.word(di+(320)-2) = ax;
-	if (--cx)
-		goto zoomloop2;
-	_add(si, (320)-23);
-	_add(di, (320)-46+(320));
-	cx = pop();
-	if (--cx)
-		goto zoomloop;
-	crosshair();
-	data.byte(kDidzoom) = 1;
-}
-
 void DreamGenContext::delthisone() {
 	STACK_CHECK;
 	push(ax);
@@ -20227,7 +20177,6 @@ void DreamGenContext::__dispatch_call(uint16 addr) {
 		case addr_createpanel2: createpanel2(); break;
 		case addr_vsync: vsync(); break;
 		case addr_doshake: doshake(); break;
-		case addr_zoom: zoom(); break;
 		case addr_delthisone: delthisone(); break;
 		case addr_doblocks: doblocks(); break;
 		case addr_transferinv: transferinv(); break;
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index 026ba1c3aa..3e6a720a15 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -625,7 +625,6 @@ public:
 	static const uint16 addr_transferinv = 0xc240;
 	static const uint16 addr_doblocks = 0xc228;
 	static const uint16 addr_delthisone = 0xc214;
-	static const uint16 addr_zoom = 0xc210;
 	static const uint16 addr_doshake = 0xc20c;
 	static const uint16 addr_vsync = 0xc208;
 	static const uint16 addr_createpanel2 = 0xc200;
@@ -1662,7 +1661,7 @@ public:
 	void usedryer();
 	void dumpeverything();
 	void usehatch();
-	void zoom();
+	//void zoom();
 	void outofinv();
 	void viewfolder();
 	//void walking();
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index ddcde72da6..0f2202d28b 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -109,4 +109,5 @@
 	void cancelch1();
 	void plotreel();
 	void dealwithspecial();
+	void zoom();
 
diff --git a/engines/dreamweb/vgagrafx.cpp b/engines/dreamweb/vgagrafx.cpp
index e61532fdb9..5acd2ec01f 100644
--- a/engines/dreamweb/vgagrafx.cpp
+++ b/engines/dreamweb/vgagrafx.cpp
@@ -387,5 +387,33 @@ void DreamGenContext::clearwork() {
 	memset(workspace(), 0, 320*200);
 }
 
+void DreamGenContext::zoom() {
+	if (data.word(kWatchingtime) != 0)
+		return;
+	if (data.byte(kZoomon) != 1)
+		return;
+	if (data.byte(kCommandtype) >= 199) {
+		putunderzoom();
+		return;
+	}
+	uint16 srcOffset = (data.word(kOldpointery) - 9) * 320 + (data.word(kOldpointerx) - 11);
+	uint16 dstOffset = (kZoomy + 4) * 320 + (kZoomx + 5);
+	const uint8 *src = workspace() + srcOffset;
+	uint8 *dst = workspace() + dstOffset;
+	for(size_t i=0; i<20; ++i) {
+		for(size_t j=0; j<23; ++j) {
+			uint8 v = src[j];
+			dst[2*j+0] = v;
+			dst[2*j+1] = v; 
+			dst[2*j+320] = v;
+			dst[2*j+321] = v; 
+		}
+		src += 320;
+		dst += 320*2;
+	}
+	crosshair();
+	data.byte(kDidzoom) = 1;
+}
+
 } /*namespace dreamgen */
 
-- 
cgit v1.2.3