From 880bcc69ef24fa6fa333a38d14d47d45c123aeb5 Mon Sep 17 00:00:00 2001
From: Bertrand Augereau
Date: Sun, 26 Jun 2011 17:03:17 +0200
Subject: DREAMWEB: showframe blacklisted

---
 engines/dreamweb/dreamgen.cpp | 109 ------------------------------------------
 engines/dreamweb/dreamgen.h   |   3 +-
 engines/dreamweb/stubs.cpp    | 109 ++++++++++++++++++++++++++++++++++--------
 engines/dreamweb/stubs.h      |   7 +--
 4 files changed, 93 insertions(+), 135 deletions(-)

(limited to 'engines/dreamweb')

diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index 90cffed8f4..c96ce3f4f2 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -4090,114 +4090,6 @@ zeroblock:
 		goto loop120;
 }
 
-void DreamGenContext::showframe() {
-	STACK_CHECK;
-	push(dx);
-	push(ax);
-	cx = ax;
-	_and(cx, 511);
-	_add(cx, cx);
-	si = cx;
-	_add(cx, cx);
-	_add(si, cx);
-	_cmp(ds.word(si), 0);
-	if (!flags.z())
-		goto notblankshow;
-	ax = pop();
-	dx = pop();
-	cx = 0;
-	return;
-notblankshow:
-	_test(ah, 128);
-	if (!flags.z())
-		goto skipoffsets;
-	al = ds.byte(si+4);
-	ah = 0;
-	_add(di, ax);
-	al = ds.byte(si+5);
-	ah = 0;
-	_add(bx, ax);
-skipoffsets:
-	cx = ds.word(si+0);
-	ax = ds.word(si+2);
-	_add(ax, 2080);
-	si = ax;
-	ax = pop();
-	dx = pop();
-	_cmp(ah, 0);
-	if (flags.z())
-		goto noeffects;
-	_test(ah, 128);
-	if (flags.z())
-		goto notcentred;
-	push(ax);
-	al = cl;
-	ah = 0;
-	_shr(ax, 1);
-	_sub(di, ax);
-	al = ch;
-	ah = 0;
-	_shr(ax, 1);
-	_sub(bx, ax);
-	ax = pop();
-notcentred:
-	_test(ah, 64);
-	if (flags.z())
-		goto notdiffdest;
-	push(cx);
-	frameoutfx();
-	cx = pop();
-	return;
-notdiffdest:
-	_test(ah, 8);
-	if (flags.z())
-		goto notprintlist;
-	push(ax);
-	ax = di;
-	_sub(ax, data.word(kMapadx));
-	push(bx);
-	_sub(bx, data.word(kMapady));
-	ah = bl;
-	bx = pop();
-	ax = pop();
-notprintlist:
-	_test(ah, 4);
-	if (flags.z())
-		goto notflippedx;
-	dx = (320);
-	es = data.word(kWorkspace);
-	push(cx);
-	frameoutfx();
-	cx = pop();
-	return;
-notflippedx:
-	_test(ah, 2);
-	if (flags.z())
-		goto notnomask;
-	dx = (320);
-	es = data.word(kWorkspace);
-	push(cx);
-	frameoutnm();
-	cx = pop();
-	return;
-notnomask:
-	_test(ah, 32);
-	if (flags.z())
-		goto noeffects;
-	dx = (320);
-	es = data.word(kWorkspace);
-	push(cx);
-	frameoutbh();
-	cx = pop();
-	return;
-noeffects:
-	dx = (320);
-	es = data.word(kWorkspace);
-	push(cx);
-	frameoutv();
-	cx = pop();
-}
-
 void DreamGenContext::frameoutbh() {
 	STACK_CHECK;
 	push(dx);
@@ -22020,7 +21912,6 @@ void DreamGenContext::__dispatch_call(uint16 addr) {
 		case addr_zoom: zoom(); break;
 		case addr_delthisone: delthisone(); break;
 		case addr_doblocks: doblocks(); break;
-		case addr_showframe: showframe(); break;
 		case addr_frameoutbh: frameoutbh(); break;
 		case addr_frameoutfx: frameoutfx(); break;
 		case addr_transferinv: transferinv(); break;
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index dc9aebe4c0..a52e142973 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -620,7 +620,6 @@ public:
 	static const uint16 addr_transferinv = 0xc240;
 	static const uint16 addr_frameoutfx = 0xc23c;
 	static const uint16 addr_frameoutbh = 0xc238;
-	static const uint16 addr_showframe = 0xc22c;
 	static const uint16 addr_doblocks = 0xc228;
 	static const uint16 addr_delthisone = 0xc214;
 	static const uint16 addr_zoom = 0xc210;
@@ -1679,7 +1678,7 @@ public:
 	void walking();
 	void diarykeyp();
 	//void readabyte();
-	void showframe();
+	//void showframe();
 	void random();
 	void obicons();
 	void frameoutbh();
diff --git a/engines/dreamweb/stubs.cpp b/engines/dreamweb/stubs.cpp
index 5123655795..512732a87a 100644
--- a/engines/dreamweb/stubs.cpp
+++ b/engines/dreamweb/stubs.cpp
@@ -83,21 +83,14 @@ void DreamGenContext::cls() {
 	engine->cls();
 }
 
-void DreamGenContext::frameoutnm() {
-	unsigned w = (uint8)cl, h = (uint8)ch;
-	unsigned pitch = (uint16)dx;
-	unsigned src = (uint16)si;
-	int x = (uint16)di, y = (uint16)bx;
-	unsigned dst = x + y * pitch;
-	//debug(1, "framenm %ux%u[pitch: %u]-> %d,%d, segment: %04x->%04x", w, h, pitch, x, y, (uint16)ds, (uint16)es);
-	for(unsigned l = 0; l < h; ++l) {
-		uint8 *src_p = ds.ptr(src + w * l, w);
-		uint8 *dst_p = es.ptr(dst + pitch * l, w);
-		memcpy(dst_p, src_p, w);
+void DreamGenContext::frameoutnm(uint8* dst, const uint8* src, uint16 pitch, uint16 width, uint16 height, uint16 x, uint16 y) {
+	dst += pitch * y + x;
+
+	for (uint16 j = 0; j < height; ++j) {
+		memcpy(dst, src, width);
+		dst += pitch;
+		src += width;
 	}
-	di += dst + pitch * h;
-	si += w * h;
-	cx = 0;
 }
 
 void DreamGenContext::seecommandtail() {
@@ -528,24 +521,26 @@ void DreamGenContext::showpcx() {
 	pcxFile.close();
 }
 
+/*
 void DreamGenContext::frameoutv() {
 	uint16 pitch = dx;
 	uint16 width = cx & 0xff;
 	uint16 height = cx >> 8;
 
 	const uint8* src = ds.ptr(si, width * height);
-	uint8* dst = es.ptr(di, pitch * height);
+	uint8* dst = es.ptr(0, pitch * height);
 
-	frameoutv(dst, src, pitch, width, height);
+	frameoutv(dst, src, pitch, width, height, di, bx);
 }
+*/
 
-void DreamGenContext::frameoutv(uint8* dst, const uint8* src, uint16 pitch, uint16 width, uint16 height) {
+void DreamGenContext::frameoutv(uint8* dst, const uint8* src, uint16 pitch, uint16 width, uint16 height, uint16 x, uint16 y) {
 	uint16 stride = pitch - width;
-	dst += pitch * bx;
+	dst += pitch * y + x;
 
 	// NB: Original code assumes non-zero width and height, "for" are unneeded, do-while would suffice but would be less readable
-	for (uint16 y = 0; y < height; ++y) {
-		for (uint16 x = 0; x < width; ++x) {
+	for (uint16 j = 0; j < height; ++j) {
+		for (uint16 i = 0; i < width; ++i) {
 			uint8 pixel = *src++;
 			if (pixel)
 				*dst = pixel;
@@ -569,6 +564,78 @@ Sprite* DreamGenContext::spritetable() {
 	return sprite;
 }
 
+uint16 DreamGenContext::showframeCPP(uint16 dst, uint16 src, uint16 x, uint16 y, uint8 frameNumber, uint8 effectsFlag) {
+	es = dst;
+	ds = src;
+	di = x;
+	bx = y;
+	al = frameNumber;
+	ah = effectsFlag;
+
+	si = (ax & 0x1ff) * 6;
+	if (ds.word(si) == 0) {
+		return 0;
+	}
+
+//notblankshow:
+	if ((effectsFlag & 128) == 0) {
+		di += ds.byte(si+4);
+		bx += ds.byte(si+5);
+	}
+//skipoffsets:
+	cx = ds.word(si+0);
+	uint8 width = cl;
+	uint8 height = ch;
+	uint16 written = cx;
+	si = ds.word(si+2) + 2080;
+
+	if (effectsFlag) {
+		if (effectsFlag & 128) { //centred
+			di -= width / 2;
+			bx -= height / 2;
+		}
+		if (effectsFlag & 64) { //diffdest
+			frameoutfx();
+			return written;
+		}
+		if (effectsFlag & 8) { //printlist
+			push(ax);
+			ax = di - data.word(kMapadx);
+			push(bx);
+			bx -= data.word(kMapady);
+			ah = bl;
+			bx = pop();
+			//addtoprintlist(); // NB: Commented in the original asm
+			ax = pop();
+		}
+		if (effectsFlag & 4) { //flippedx
+			dx = (320);
+			es = data.word(kWorkspace);
+			frameoutfx();
+			return written;
+		}
+		if (effectsFlag & 2) { //nomask
+			es = data.word(kWorkspace);
+			frameoutnm(es.ptr(0, 320 * height), ds.ptr(si, width * height), 320, width, height, di, bx);
+			return written;
+		}
+		if (effectsFlag & 32) {
+			dx = (320);
+			es = data.word(kWorkspace);
+			frameoutbh();
+			return written;
+		}
+	}
+//noeffects:
+	es = data.word(kWorkspace);
+	frameoutv(es.ptr(0, 320 * height), ds.ptr(si, width * height), 320, width, height, di, bx);
+	return written;
+}
+
+void DreamGenContext::showframe() {
+	cx = showframeCPP(es, ds, di, bx, al, ah);
+}
+
 void DreamGenContext::printsprites() {
 	for (size_t priority = 0; priority < 7; ++priority) {
 		Sprite *sprites = spritetable();
@@ -606,7 +673,7 @@ void DreamGenContext::printasprite(const Sprite* sprite) {
 	ax = sprite->b15;
 	if (sprite->type != 0)
 		ah = 8;
-	showframe(); // NB: Params in ax, bx, di,  ds:dx
+	showframe();
 
 	bx = pop();
 	es = pop();
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index 7f1e3b9f0c..0b48c2d363 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -1,6 +1,6 @@
 	void multidump();
-	void frameoutv();
-	void frameoutv(uint8* dst, const uint8* src, uint16 pitch, uint16 width, uint16 height);
+	void frameoutv(uint8* dst, const uint8* src, uint16 pitch, uint16 width, uint16 height, uint16 x, uint16 y);
+	void frameoutnm(uint8* dst, const uint8* src, uint16 pitch, uint16 width, uint16 height, uint16 x, uint16 y);
 	void worktoscreen();
 	void multiget();
 	void convertkey();
@@ -10,10 +10,11 @@
 	void readoneblock();
 	void printundermon();
 	void seecommandtail();
-	void frameoutnm();
 	void randomnumber();
 	void quickquit2();
 	Sprite* spritetable();
+	void showframe();
+	uint16 showframeCPP(uint16 dst, uint16 src, uint16 x, uint16 y, uint8 frameNumber, uint8 effectsFlag);
 	void printasprite(const Sprite* sprite);
 	void width160();
 	void multiput();
-- 
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