DM: Refactor DisplayMan::DrawFrame and Frame POD

engines/dm/dm.cpp

@@ -57,9 +57,9 @@ Common::Error DMEngine::run() {
 	_displayMan->loadGraphics();
 	_dungeonMan->loadDungeonFile();
 
-	/*
 	_displayMan->loadPalette(palCredits);
 
+	/*
 	uint16 width = _displayMan->getImageWidth(1);
 	uint16 height = _displayMan->getImageHeight(1);
 	byte *cleanByteImg0Data = new byte[width * height];
@@ -68,8 +68,8 @@ Common::Error DMEngine::run() {
 	delete[] cleanByteImg0Data;
 	*/
 
-
 	while (true) {
+		_displayMan->clearScreen(colorBlack);
 		_displayMan->drawDungeon();
 		_displayMan->updateScreen();
 		_system->delayMillis(10);

engines/dm/gfx.cpp

@@ -29,16 +29,15 @@ enum GraphicIndice {
 };
 
 struct Frame {
-	/*	this might have to be removed, depends on if the game uses frames with multiple bitmaps
-		If so, then GraphIndice enum will have to be moved to be available from outside gfx.cpp*/
-	GraphicIndice graphIndice;
 	// srcWidth and srcHeight (present in the original sources) is redundant here, can be deduced from gaphicsIndice
+	// these coorinates are inclusive boundaries, when blitting you gotta add +1 to srcTo fields
 	uint16 srcFromX, srcToX, srcFromY, srcToY;
+	uint16 srcWidth, srcHeight;
 	uint16 destX, destY;
-	Color transparent;
 };
 
-Frame ceilingFrame = {CeilingGraphIndice, 0, 223, 0, 28, 0, 0, colorFlesh};
+Frame ceilingFrame = {0, 223, 0, 28, 224, 29, 0, 0};
+Frame floorFrame = {0, 223, 66, 135, 224, 70, 0, 0};
 
 }
 
@@ -61,7 +60,7 @@ void DisplayMan::setUpScreens(uint16 width, uint16 height) {
 	_screenHeight = height;
 	loadPalette(palSwoosh);
 	_vgaBuffer = new byte[_screenWidth * _screenHeight];
-	memset(_vgaBuffer, 0, width * height);
+	clearScreen(colorBlack);
 }
 
 void DisplayMan::loadGraphics() {
@@ -205,11 +204,19 @@ uint16 DisplayMan::getImageHeight(uint16 index) {
 	return TOBE2(data[2], data[3]);
 }
 
-void DisplayMan::drawFrame(Frame &f) {
-	blitToScreen(_unpackedBitmaps[f.graphIndice], f.srcFromX, f.srcToX, f.srcFromY, f.srcToY, getImageWidth(f.graphIndice), f.destX, f.destY, f.transparent);
+void DisplayMan::drawFrameToScreen(byte *bitmap, Frame &f, Color transparent) {
+	blitToScreen(bitmap, f.srcFromX, f.srcToX + 1, f.srcFromY, f.srcToY + 1, f.srcWidth, f.destX, f.destY, transparent);
+}
+
+void DisplayMan::drawFrameToBitMap(byte *bitmap, Frame &f, Color transparent, byte *destBitmap, uint16 destWidth) {
+	blitToBitmap(bitmap, f.srcFromX, f.srcToX + 1, f.srcFromY, f.srcToY + 1, f.srcWidth, f.destX, f.destY, destBitmap, destWidth, transparent);
 }
 
 void DisplayMan::drawDungeon() {
 	loadPalette(palDungeonView0);
-	drawFrame(ceilingFrame);
+	drawFrameToScreen(_unpackedBitmaps[CeilingGraphIndice], ceilingFrame, colorFlesh);
+}
+
+void DisplayMan::clearScreen(Color color) {
+	memset(getCurrentVgaBuffer(), color, sizeof(byte) * _screenWidth * _screenHeight);
 }

engines/dm/gfx.h

@@ -58,7 +58,8 @@ class DisplayMan {
 
 	byte **_unpackedBitmaps;
 	void unpackGraphics();
-	void drawFrame(Frame &f);
+	inline void drawFrameToScreen(byte *bitmap, Frame &f, Color transparent);
+	inline void drawFrameToBitMap(byte *bitmap, Frame &f, Color transparent, byte *destBitmap, uint16 destWidth);
 public:
 	DisplayMan(DMEngine *dmEngine);
 	~DisplayMan();
@@ -72,10 +73,11 @@ class DisplayMan {
 	void DisplayMan::blitToBitmap(byte *srcBitmap, uint16 srcFromX, uint16 srcToX, uint16 srcFromY, uint16 srcToY,
 								  int16 srcWidth, uint16 destX, uint16 destY, byte *destBitmap, uint16 destWidth, Color transparent = colorNoTransparency);
 	inline void DisplayMan::blitToScreen(byte *srcBitmap, uint16 srcFromX, uint16 srcToX, uint16 srcFromY, uint16 srcToY,
-								  int16 srcWidth, uint16 destX, uint16 destY, Color transparent = colorNoTransparency);
+										 int16 srcWidth, uint16 destX, uint16 destY, Color transparent = colorNoTransparency);
 	byte *getCurrentVgaBuffer();
 	void updateScreen();
 	void drawDungeon();
+	void clearScreen(Color color);
 };
 
 }