DREAMWEB: Drawing of background objects ported to C++

7 files changed, 200 insertions, 232 deletions

diff --git a/engines/dreamweb/backdrop.cpp b/engines/dreamweb/backdrop.cpp
new file mode 100644
index 0000000000..010d314b74
--- /dev/null
+++ b/engines/dreamweb/backdrop.cpp
@@ -0,0 +1,134 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "dreamweb/dreamweb.h"
+#include "engines/util.h"
+#include "graphics/surface.h"
+
+namespace DreamGen {
+
+uint8 DreamGenContext::getxad(const uint8 *setData, uint8 *result) {
+	uint8 v0 = setData[0];
+	uint8 v1 = setData[1];
+	uint8 v2 = setData[2];
+	if (v0 != 0)
+		return 0;
+	if (v1 < data.byte(kMapx))
+		return 0;
+	v1 -= data.byte(kMapx);
+	if (v1 >= 11)
+		return 0;
+	*result = (v1 << 4) | v2;
+	return 1;
+}
+
+uint8 DreamGenContext::getyad(const uint8 *setData, uint8 *result) {
+	uint8 v0 = setData[3];
+	uint8 v1 = setData[4];
+	if (v0 < data.byte(kMapy))
+		return 0;
+	v0 -= data.byte(kMapy);
+	if (v0 >= 10)
+		return 0;
+	*result = (v0 << 4) | v1;
+	return 1;
+}
+
+void DreamGenContext::getmapad() {
+	ch = getmapad((const uint8 *)es.ptr(si, 5));
+}
+
+uint8 DreamGenContext::getmapad(const uint8 *setData) {
+	uint8 xad, yad;
+	if (getxad(setData, &xad) == 0)
+		return 0;
+	data.word(kObjectx) = xad;
+	if (getyad(setData, &yad) == 0)
+		return 0;
+	data.word(kObjecty) = yad;
+	return 1;
+}
+
+void DreamGenContext::calcfrframe() {
+	const Frame *frame = (const Frame *)segRef(data.word(kFrsegment)).ptr(data.word(kCurrentframe) * sizeof(Frame), sizeof(Frame));
+	data.word(kSavesource) = data.word(kFramesad) + frame->ptr();
+	data.byte(kSavesize+0) = frame->width;
+	data.byte(kSavesize+1) = frame->height;
+	data.word(kOffsetx) = frame->x;
+	data.word(kOffsety) = frame->y;
+}
+
+void DreamGenContext::finalframe() {
+	uint16 x, y;
+	finalframe(&x, &y);
+	di = x;
+	bx = y;
+}
+
+void DreamGenContext::finalframe(uint16 *x, uint16 *y) {
+	data.byte(kSavex) = (data.word(kObjectx) + data.word(kOffsetx)) & 0xff;
+	data.byte(kSavey) = (data.word(kObjecty) + data.word(kOffsety)) & 0xff;
+	*x = data.word(kObjectx);
+	*y = data.word(kObjecty);
+}
+
+void DreamGenContext::showallobs() {
+	data.word(kListpos) = kSetlist;
+	memset(segRef(data.word(kBuffers)).ptr(kSetlist, 0), 0xff, 128 * 5);
+	data.word(kFrsegment) = data.word(kSetframes);
+	data.word(kDataad) = kFramedata;
+	data.word(kFramesad) = kFrames;
+
+	const Frame *frames = (const Frame *)segRef(data.word(kFrsegment)).ptr(0, 0);
+	ObjData *setEntries = (ObjData *)segRef(data.word(kSetdat)).ptr(0, 128 * sizeof(ObjData));
+	for (size_t i = 0; i < 128; ++i) {
+		ObjData *setEntry = setEntries + i;
+		if (getmapad(setEntry->b58) == 0)
+			continue;
+		uint8 currentFrame = setEntry->b18[0];
+		data.word(kCurrentframe) = currentFrame;
+		if (currentFrame == 0xff)
+			continue;
+		calcfrframe();
+		uint16 x, y;
+		finalframe(&x, &y);
+		setEntry->b17 = setEntry->b18[0];
+		if ((setEntry->type == 0) && (setEntry->priority != 5) && (setEntry->priority != 6)) {
+			x += data.word(kMapadx);
+			y += data.word(kMapady);
+			uint8 width, height;
+			showframe(frames, x, y, data.word(kCurrentframe), 0, &width, &height);
+		} else
+			makebackob(setEntry);
+
+		ObjPos *objPos = (ObjPos *)segRef(data.word(kBuffers)).ptr(data.word(kListpos), sizeof(ObjPos));
+		objPos->xMin = data.byte(kSavex);
+		objPos->yMin = data.byte(kSavey);
+		objPos->xMax = data.byte(kSavex) + data.byte(kSavesize+0);
+		objPos->yMax = data.byte(kSavey) + data.byte(kSavesize+1);
+		objPos->index = i;
+		data.word(kListpos) += sizeof(ObjPos);
+	}
+}
+
+} /*namespace dreamgen */
+
diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index 9a5a27dff0..23c9096aa2 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -6585,93 +6585,6 @@ _tmp28a:
 		goto _tmp28;
 }
 
-void DreamGenContext::showallobs() {
-	STACK_CHECK;
-	es = data.word(kBuffers);
-	bx = (0+(228*13)+32+60+(32*32)+(11*10*3)+768+768+768+(32*32));
-	data.word(kListpos) = bx;
-	di = bx;
-	cx = 128*5;
-	al = 255;
-	_stosb(cx, true);
-	es = data.word(kSetframes);
-	data.word(kFrsegment) = es;
-	ax = (0);
-	data.word(kDataad) = ax;
-	ax = (0+2080);
-	data.word(kFramesad) = ax;
-	data.byte(kCurrentob) = 0;
-	ds = data.word(kSetdat);
-	si = 0;
-	cx = 128;
-showobsloop:
-	push(cx);
-	push(si);
-	push(si);
-	_add(si, 58);
-	es = data.word(kSetdat);
-	getmapad();
-	si = pop();
-	_cmp(ch, 0);
-	if (flags.z())
-		goto blankframe;
-	al = es.byte(si+18);
-	ah = 0;
-	data.word(kCurrentframe) = ax;
-	_cmp(al, 255);
-	if (flags.z())
-		goto blankframe;
-	push(es);
-	push(si);
-	calcfrframe();
-	finalframe();
-	si = pop();
-	es = pop();
-	al = es.byte(si+18);
-	es.byte(si+17) = al;
-	_cmp(es.byte(si+8), 0);
-	if (!flags.z())
-		goto animating;
-	_cmp(es.byte(si+5), 5);
-	if (flags.z())
-		goto animating;
-	_cmp(es.byte(si+5), 6);
-	if (flags.z())
-		goto animating;
-	ax = data.word(kCurrentframe);
-	ah = 0;
-	_add(di, data.word(kMapadx));
-	_add(bx, data.word(kMapady));
-	showframe();
-	goto drawnsetob;
-animating:
-	makebackob();
-drawnsetob:
-	si = data.word(kListpos);
-	es = data.word(kBuffers);
-	al = data.byte(kSavex);
-	ah = data.byte(kSavey);
-	es.word(si) = ax;
-	cx = ax;
-	ax = data.word(kSavesize);
-	_add(al, cl);
-	_add(ah, ch);
-	es.word(si+2) = ax;
-	al = data.byte(kCurrentob);
-	es.byte(si+4) = al;
-	_add(si, 5);
-	data.word(kListpos) = si;
-blankframe:
-	_inc(data.byte(kCurrentob));
-	si = pop();
-	cx = pop();
-	_add(si, 64);
-	_dec(cx);
-	if (flags.z())
-		return /* (finishedsetobs) */;
-	goto showobsloop;
-}
-
 void DreamGenContext::showallfree() {
 	STACK_CHECK;
 	es = data.word(kBuffers);
@@ -6841,52 +6754,6 @@ blankex:
 	goto exloop;
 }
 
-void DreamGenContext::calcfrframe() {
-	STACK_CHECK;
-	dx = data.word(kFrsegment);
-	ax = data.word(kFramesad);
-	push(ax);
-	cx = data.word(kDataad);
-	ax = data.word(kCurrentframe);
-	ds = dx;
-	bx = 6;
-	_mul(bx);
-	_add(ax, cx);
-	bx = ax;
-	cx = ds.word(bx);
-	ax = ds.word(bx+2);
-	dx = ds.word(bx+4);
-	bx = pop();
-	push(dx);
-	_add(ax, bx);
-	data.word(kSavesource) = ax;
-	data.word(kSavesize) = cx;
-	ax = pop();
-	push(ax);
-	ah = 0;
-	data.word(kOffsetx) = ax;
-	ax = pop();
-	al = ah;
-	ah = 0;
-	data.word(kOffsety) = ax;
-	return;
-	ax = pop();
-	cx = 0;
-	data.word(kSavesize) = cx;
-}
-
-void DreamGenContext::finalframe() {
-	STACK_CHECK;
-	ax = data.word(kObjecty);
-	_add(ax, data.word(kOffsety));
-	bx = data.word(kObjectx);
-	_add(bx, data.word(kOffsetx));
-	data.byte(kSavex) = bl;
-	data.byte(kSavey) = al;
-	di = data.word(kObjectx);
-	bx = data.word(kObjecty);
-}
-
 void DreamGenContext::adjustlen() {
 	STACK_CHECK;
 	ah = al;
@@ -6899,70 +6766,6 @@ void DreamGenContext::adjustlen() {
 	ch = al;
 }
 
-void DreamGenContext::getmapad() {
-	STACK_CHECK;
-	getxad();
-	_cmp(ch, 0);
-	if (flags.z())
-		return /* (over146) */;
-	data.word(kObjectx) = ax;
-	getyad();
-	_cmp(ch, 0);
-	if (flags.z())
-		return /* (over146) */;
-	data.word(kObjecty) = ax;
-	ch = 1;
-}
-
-void DreamGenContext::getxad() {
-	STACK_CHECK;
-	cl = es.byte(si);
-	_inc(si);
-	al = es.byte(si);
-	_inc(si);
-	ah = es.byte(si);
-	_inc(si);
-	_cmp(cl, 0);
-	if (!flags.z())
-		goto over148;
-	_sub(al, data.byte(kMapx));
-	if (flags.c())
-		goto over148;
-	_cmp(al, 11);
-	if (!flags.c())
-		goto over148;
-	cl = 4;
-	_shl(al, cl);
-	_or(al, ah);
-	ah = 0;
-	ch = 1;
-	return;
-over148:
-	ch = 0;
-}
-
-void DreamGenContext::getyad() {
-	STACK_CHECK;
-	al = es.byte(si);
-	_inc(si);
-	ah = es.byte(si);
-	_inc(si);
-	_sub(al, data.byte(kMapy));
-	if (flags.c())
-		goto over147;
-	_cmp(al, 10);
-	if (!flags.c())
-		goto over147;
-	cl = 4;
-	_shl(al, cl);
-	_or(al, ah);
-	ah = 0;
-	ch = 1;
-	return;
-over147:
-	ch = 0;
-}
-
 void DreamGenContext::autolook() {
 	STACK_CHECK;
 	ax = data.word(kMousex);
@@ -19169,15 +18972,9 @@ void DreamGenContext::__dispatch_call(uint16 addr) {
 		case addr_addalong: addalong(); break;
 		case addr_addlength: addlength(); break;
 		case addr_drawflags: drawflags(); break;
-		case addr_showallobs: showallobs(); break;
 		case addr_showallfree: showallfree(); break;
 		case addr_showallex: showallex(); break;
-		case addr_calcfrframe: calcfrframe(); break;
-		case addr_finalframe: finalframe(); break;
 		case addr_adjustlen: adjustlen(); break;
-		case addr_getmapad: getmapad(); break;
-		case addr_getxad: getxad(); break;
-		case addr_getyad: getyad(); break;
 		case addr_autolook: autolook(); break;
 		case addr_look: look(); break;
 		case addr_dolook: dolook(); break;
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index e1071dfebc..5cb261420b 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -477,15 +477,9 @@ public:
 	static const uint16 addr_dolook = 0xc474;
 	static const uint16 addr_look = 0xc470;
 	static const uint16 addr_autolook = 0xc46c;
-	static const uint16 addr_getyad = 0xc468;
-	static const uint16 addr_getxad = 0xc464;
-	static const uint16 addr_getmapad = 0xc460;
 	static const uint16 addr_adjustlen = 0xc45c;
-	static const uint16 addr_finalframe = 0xc458;
-	static const uint16 addr_calcfrframe = 0xc454;
 	static const uint16 addr_showallex = 0xc450;
 	static const uint16 addr_showallfree = 0xc44c;
-	static const uint16 addr_showallobs = 0xc444;
 	static const uint16 addr_drawflags = 0xc43c;
 	static const uint16 addr_addlength = 0xc438;
 	static const uint16 addr_addalong = 0xc434;
@@ -1293,6 +1287,7 @@ public:
 	void startdmablock();
 	void useopenbox();
 	void clearbuffers();
+	//void getyad();
 	void neterror();
 	void storeit();
 	//void lockeddoorway();
@@ -1405,7 +1400,7 @@ public:
 	void watchcount();
 	void fadedownmon();
 	void loadcart();
-	void splitintolines();
+	//void calcfrframe();
 	void bartender();
 	void eden();
 	void showdiary();
@@ -1485,7 +1480,7 @@ public:
 	//void cls();
 	//void printsprites();
 	//void checkifperson();
-	void showallobs();
+	//void showallobs();
 	//void getnumber();
 	void adjustleft();
 	void calledenslift();
@@ -1596,7 +1591,7 @@ public:
 	void loadmenu();
 	//void aboutturn();
 	void checkifpathison();
-	void smallcandle();
+	//void finalframe();
 	void receptionist();
 	void selectslot();
 	void edenscdplayer();
@@ -1604,7 +1599,6 @@ public:
 	void fadeupmon();
 	void paltoendpal();
 	void fadetowhite();
-	void textformonk();
 	void loadsavebox();
 	void soundend();
 	void redes();
@@ -1623,7 +1617,7 @@ public:
 	void getbacktoops();
 	void rollendcredits();
 	void intro1text();
-	void getmapad();
+	void transfertoex();
 	void playchannel1();
 	void playchannel0();
 	void usemon();
@@ -1672,7 +1666,7 @@ public:
 	void nothelderror();
 	//void readheader();
 	void getsetad();
-	void getyad();
+	void textformonk();
 	void reconstruct();
 	void soldier1();
 	void getundercentre();
@@ -1717,7 +1711,7 @@ public:
 	void fadescreendown();
 	void findxyfrompath();
 	void namestoold();
-	void getxad();
+	//void getxad();
 	void openinv();
 	void lookatplace();
 	void useaxe();
@@ -1827,7 +1821,7 @@ public:
 	void dolook();
 	void opentvdoor();
 	void triggermessage();
-	void finalframe();
+	void smallcandle();
 	//void plotreel();
 	void swapwithopen();
 	//void makesprite();
@@ -1929,7 +1923,7 @@ public:
 	void closefile();
 	void delcurs();
 	void randomaccess();
-	void calcfrframe();
+	void splitintolines();
 	void intromagic3();
 	void initialmoncols();
 	void checkforshake();
@@ -1967,7 +1961,7 @@ public:
 	void showfirstuse();
 	void setupemm();
 	void usefullcart();
-	void transfertoex();
+	//void getmapad();
 	void getlocation();
 	void geteitherad();
 	void placesetobject();
diff --git a/engines/dreamweb/module.mk b/engines/dreamweb/module.mk
index 6c4c506695..c7307e8c2a 100644
--- a/engines/dreamweb/module.mk
+++ b/engines/dreamweb/module.mk
@@ -1,6 +1,7 @@
 MODULE := engines/dreamweb
 
 MODULE_OBJS := \
+	backdrop.o \
 	console.o \
 	detection.o \
 	dreamweb.o \
diff --git a/engines/dreamweb/structs.h b/engines/dreamweb/structs.h
index 685e4cffe1..8a9d81c9a5 100644
--- a/engines/dreamweb/structs.h
+++ b/engines/dreamweb/structs.h
@@ -60,7 +60,7 @@ struct ObjData {
 	uint8 b2;
 	uint8 b3;
 	uint8 b4;
-	uint8 b5;
+	uint8 priority;
 	uint8 b6;
 	uint8 delay;
 	uint8 type;
@@ -73,7 +73,44 @@ struct ObjData {
 	uint8 b15;
 	uint8 b16;
 	uint8 b17;
-	uint8 b18[256]; // NB: Don't know the size yet
+	uint8 b18[13]; // NB: Don't know the size yet
+	uint8 b31;
+	uint8 b32;
+	uint8 b33;
+	uint8 b34;
+	uint8 b35;
+	uint8 b36;
+	uint8 b37;
+	uint8 b38;
+	uint8 b39;
+	uint8 b40;
+	uint8 b41;
+	uint8 b42;
+	uint8 b43;
+	uint8 b44;
+	uint8 b45;
+	uint8 b46;
+	uint8 b47;
+	uint8 b48;
+	uint8 b49;
+	uint8 b50;
+	uint8 b51;
+	uint8 b52;
+	uint8 b53;
+	uint8 b54;
+	uint8 b55;
+	uint8 b56;
+	uint8 b57;
+	uint8 b58[5];
+	uint8 b63;
+};
+
+struct ObjPos {
+	uint8 xMin;
+	uint8 yMin;
+	uint8 xMax;
+	uint8 yMax;
+	uint8 index;
 };
 
 struct Frame {
diff --git a/engines/dreamweb/stubs.cpp b/engines/dreamweb/stubs.cpp
index c978d8d475..1c60fb6a4f 100644
--- a/engines/dreamweb/stubs.cpp
+++ b/engines/dreamweb/stubs.cpp
@@ -679,20 +679,17 @@ uint8 *DreamGenContext::getroomspathsCPP() {
 	return (uint8 *)result;
 }
 
-void DreamGenContext::makebackob() {
+void DreamGenContext::makebackob(ObjData *objData) {
 	if (data.byte(kNewobs) == 0)
 		return;
-	uint8 priority = es.byte(si+5);
-	uint8 type = es.byte(si+8);
+	uint8 priority = objData->priority;
+	uint8 type = objData->type;
 	Sprite *sprite = makesprite(data.word(kObjectx), data.word(kObjecty), addr_backobject, data.word(kSetframes), 0);
 
-	// Recover es:bx from sprite
-	es = data.word(kBuffers);
-	bx = kSpritetable;
-	Sprite *sprites = (Sprite *)es.ptr(bx, sizeof(Sprite) * 16);
-	bx += sizeof(Sprite) * (sprite - sprites);
-	//
-	sprite->setObjData(si);
+	uint16 objDataOffset = (uint8 *)objData - segRef(data.word(kSetdat)).ptr(0, 0);
+	assert(objDataOffset % sizeof(ObjData) == 0);
+	assert(objDataOffset < 128 * sizeof(ObjData));
+	sprite->setObjData(objDataOffset);
 	if (priority == 255)
 		priority = 0;
 	sprite->priority = priority;
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index c4385613f6..04773ee677 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -105,7 +105,7 @@
 	void turnpathoffCPP(uint8 param);
 	void getroomspaths();
 	uint8 *getroomspathsCPP();
-	void makebackob();
+	void makebackob(ObjData *objData);
 	void modifychar();
 	void lockmon();
 	void cancelch0();
@@ -130,5 +130,13 @@
 	void madmantext();
 	void madmode();
 	void movemap(uint8 param);
+	void getmapad();
+	uint8 getmapad(const uint8 *setData);
+	uint8 getxad(const uint8 *setData, uint8 *result);
+	uint8 getyad(const uint8 *setData, uint8 *result);
+	void calcfrframe();
+	void finalframe();
+	void finalframe(uint16 *x, uint16 *y);
+	void showallobs();
 	bool isCD();