From ef2096736d9b14c842094b94bff1b772de311e72 Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Fri, 9 Dec 2011 18:41:45 +0100
Subject: DREAMWEB: Convert greyscaleSum, allPalette, dumpCurrent

---
 engines/dreamweb/dreambase.h  |  3 ++
 engines/dreamweb/dreamgen.cpp | 83 -------------------------------------------
 engines/dreamweb/dreamgen.h   |  3 --
 engines/dreamweb/stubs.cpp    |  9 -----
 engines/dreamweb/vgafades.cpp | 58 ++++++++++++++++++++++++++++++
 engines/dreamweb/vgagrafx.cpp |  2 +-
 6 files changed, 62 insertions(+), 96 deletions(-)

(limited to 'engines')

diff --git a/engines/dreamweb/dreambase.h b/engines/dreamweb/dreambase.h
index 285c44b600..ad6748d021 100644
--- a/engines/dreamweb/dreambase.h
+++ b/engines/dreamweb/dreambase.h
@@ -170,6 +170,9 @@ public:
 	void fadeScreenUpHalf();
 	void fadeScreenDown();
 	void fadeScreenDowns();
+	void greyscaleSum();
+	void allPalette();
+	void dumpCurrent();
 
 	// from vgagrafx.cpp
 	uint8 _workspace[(0x1000 + 2) * 16];
diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index 8fd359ff12..94658a164b 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -1027,89 +1027,6 @@ endearly2:
 	cx = pop();
 }
 
-void DreamGenContext::greyscaleSum() {
-	STACK_CHECK;
-	es = data.word(kBuffers);
-	si = (0+(228*13)+32+60+(32*32)+(11*10*3)+768+768);
-	di = (0+(228*13)+32+60+(32*32)+(11*10*3)+768);
-	cx = 256;
-greysumloop1:
-	push(cx);
-	bx = 0;
-	al = es.byte(si);
-	ah = 0;
-	cx = 20;
-	_mul(cx);
-	_add(bx, ax);
-	al = es.byte(si+1);
-	ah = 0;
-	cx = 59;
-	_mul(cx);
-	_add(bx, ax);
-	al = es.byte(si+2);
-	ah = 0;
-	cx = 11;
-	_mul(cx);
-	_add(bx, ax);
-	al = -1;
-greysumloop2:
-	_inc(al);
-	_sub(bx, 100);
-	if (!flags.c())
-		goto greysumloop2;
-	bl = al;
-	al = bl;
-	ah = data.byte(kAddtored);
-	_cmp(al, 0);
-	_add(al, ah);
-	_stosb();
-	ah = data.byte(kAddtogreen);
-	al = bl;
-	_cmp(al, 0);
-	if (flags.z())
-		goto noaddg;
-	_add(al, ah);
-noaddg:
-	_stosb();
-	ah = data.byte(kAddtoblue);
-	al = bl;
-	_cmp(al, 0);
-	if (flags.z())
-		goto noaddb;
-	_add(al, ah);
-noaddb:
-	_stosb();
-	_add(si, 3);
-	cx = pop();
-	if (--cx)
-		goto greysumloop1;
-}
-
-void DreamGenContext::allPalette() {
-	STACK_CHECK;
-	es = data.word(kBuffers);
-	ds = data.word(kBuffers);
-	di = (0+(228*13)+32+60+(32*32)+(11*10*3));
-	si = (0+(228*13)+32+60+(32*32)+(11*10*3)+768+768);
-	cx = 768/2;
-	_movsw(cx, true);
-	dumpCurrent();
-}
-
-void DreamGenContext::dumpCurrent() {
-	STACK_CHECK;
-	si = (0+(228*13)+32+60+(32*32)+(11*10*3));
-	ds = data.word(kBuffers);
-	vSync();
-	al = 0;
-	cx = 128;
-	showGroup();
-	vSync();
-	al = 128;
-	cx = 128;
-	showGroup();
-}
-
 void DreamGenContext::fadeDownMon() {
 	STACK_CHECK;
 	palToStartPal();
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index f537db7958..ef45dd5a97 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -517,7 +517,6 @@ public:
 	void moneyPoke();
 	void doSomeTalk();
 	void resetLocation();
-	void greyscaleSum();
 	void getOpenedSize();
 	void adjustUp();
 	void fadeScreenDownHalf();
@@ -547,7 +546,6 @@ public:
 	void dirFile();
 	void pickupConts();
 	void nextColon();
-	void allPalette();
 	void findInvPos();
 	void rollEndCredits();
 	void getKeyAndLogo();
@@ -589,7 +587,6 @@ public:
 	void openOb();
 	void drawItAll();
 	void useStereo();
-	void dumpCurrent();
 	void showDiaryKeys();
 	void rollEndCredits2();
 	void useOpened();
diff --git a/engines/dreamweb/stubs.cpp b/engines/dreamweb/stubs.cpp
index 409b235133..226c085a2b 100644
--- a/engines/dreamweb/stubs.cpp
+++ b/engines/dreamweb/stubs.cpp
@@ -995,15 +995,6 @@ void DreamGenContext::DOSReturn() {
 void DreamGenContext::set16ColPalette() {
 }
 
-void DreamGenContext::showGroup() {
-	engine->processEvents();
-	unsigned n = (uint16)cx;
-	uint8 *src = ds.ptr(si, n * 3);
-	engine->setPalette(src, al, n);
-	si += n * 3;
-	cx = 0;
-}
-
 void DreamGenContext::eraseOldObs() {
 	if (data.byte(kNewobs) == 0)
 		return;
diff --git a/engines/dreamweb/vgafades.cpp b/engines/dreamweb/vgafades.cpp
index ceb4178b59..6f5af573c4 100644
--- a/engines/dreamweb/vgafades.cpp
+++ b/engines/dreamweb/vgafades.cpp
@@ -190,4 +190,62 @@ void DreamGenContext::clearPalette() {
 	dumpCurrent();
 }
 
+// Converts palette to grey scale, summed using formula
+// .20xred + .59xGreen + .11xBlue
+void DreamBase::greyscaleSum() {
+	byte *src = mainPalette();
+	byte *dst = endPalette();
+
+	for (int i = 0; i < 256; ++i) {
+		const unsigned int r = 20 * *src++;
+		const unsigned int g = 59 * *src++;
+		const unsigned int b = 11 * *src++;
+		const byte grey = (r + b + g) / 100;
+		byte tmp;
+
+		tmp = grey;
+		//if (tmp != 0)	// FIXME: The assembler code has this check commented out. Bug or feature?
+			tmp += data.byte(kAddtored);
+		*dst++ = tmp;
+
+		tmp = grey;
+		if (tmp != 0)
+			tmp += data.byte(kAddtogreen);
+		*dst++ = tmp;
+
+		tmp = grey;
+		if (tmp != 0)
+			tmp += data.byte(kAddtoblue);
+		*dst++ = tmp;
+	}
+}
+
+void DreamBase::allPalette() {
+	memcpy(startPalette(), mainPalette(), 3 * 256);
+	dumpCurrent();
+}
+
+void DreamBase::dumpCurrent() {
+	uint8 *pal = startPalette();
+
+	engine->waitForVSync();
+	engine->processEvents();
+	engine->setPalette(pal, 0, 128);
+
+	pal += 128 * 3;
+
+	engine->waitForVSync();
+	engine->processEvents();
+	engine->setPalette(pal, 128, 128);
+}
+
+void DreamGenContext::showGroup() {
+	engine->processEvents();
+	unsigned n = (uint16)cx;
+	uint8 *src = ds.ptr(si, n * 3);
+	engine->setPalette(src, al, n);
+	si += n * 3;
+	cx = 0;
+}
+
 } // End of namespace DreamGen
diff --git a/engines/dreamweb/vgagrafx.cpp b/engines/dreamweb/vgagrafx.cpp
index c7d17c1012..cea9dbef8c 100644
--- a/engines/dreamweb/vgagrafx.cpp
+++ b/engines/dreamweb/vgagrafx.cpp
@@ -183,7 +183,7 @@ void DreamBase::vSync() {
 }
 
 void DreamBase::setMode() {
-	vSync();
+	engine->waitForVSync();
 	initGraphics(320, 200, false);
 }
 
-- 
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