From 46ed79ad42373950b468278981ec0d24845c5921 Mon Sep 17 00:00:00 2001
From: qndel <stefan551@o2.pl>
Date: Sat, 6 Nov 2021 18:53:53 +0100
Subject: [PATCH] add megatiles to tiledata (#3211)

---
 Source/debug.cpp    | 38 ++++++++++++++++++++++++++++++++++++++
 Source/debug.h      |  1 +
 Source/scrollrt.cpp | 45 ++++++++++++++++++++++++++++++---------------
 3 files changed, 69 insertions(+), 15 deletions(-)

diff --git a/Source/debug.cpp b/Source/debug.cpp
index 33535034a..3517f8284 100644
--- a/Source/debug.cpp
+++ b/Source/debug.cpp
@@ -52,14 +52,23 @@ enum class DebugGridTextItem : uint16_t {
 	dObject,
 	dItem,
 	dSpecial,
+
 	coords,
 	cursorcoords,
 	objectindex,
+
+	//take dPiece as index
 	nBlockTable,
 	nSolidTable,
 	nTransTable,
 	nMissileTable,
 	nTrapTable,
+
+	// megatiles
+	AutomapView,
+	dungeon,
+	pdungeon,
+	dflags,
 };
 
 DebugGridTextItem SelectedDebugGridTextItem;
@@ -611,6 +620,10 @@ std::string DebugCmdShowTileData(const string_view parameter)
 		"nTransTable",
 		"nMissileTable",
 		"nTrapTable",
+		"AutomapView",
+		"dungeon",
+		"pdungeon",
+		"dflags",
 	};
 
 	if (parameter == "clear") {
@@ -813,9 +826,22 @@ bool IsDebugGridTextNeeded()
 	return SelectedDebugGridTextItem != DebugGridTextItem::None;
 }
 
+bool IsDebugGridInMegatiles()
+{
+	switch (SelectedDebugGridTextItem) {
+	case DebugGridTextItem::AutomapView:
+	case DebugGridTextItem::dungeon:
+	case DebugGridTextItem::pdungeon:
+	case DebugGridTextItem::dflags:
+		return true;
+	}
+	return false;
+}
+
 bool GetDebugGridText(Point dungeonCoords, char *debugGridTextBuffer)
 {
 	int info = 0;
+	Point megaCoords = { (dungeonCoords.x - 16) / 2, (dungeonCoords.y - 16) / 2 };
 	switch (SelectedDebugGridTextItem) {
 	case DebugGridTextItem::coords:
 		sprintf(debugGridTextBuffer, "%d:%d", dungeonCoords.x, dungeonCoords.y);
@@ -882,6 +908,18 @@ bool GetDebugGridText(Point dungeonCoords, char *debugGridTextBuffer)
 	case DebugGridTextItem::nTrapTable:
 		info = nTrapTable[dPiece[dungeonCoords.x][dungeonCoords.y]];
 		break;
+	case DebugGridTextItem::AutomapView:
+		info = AutomapView[megaCoords.x][megaCoords.y];
+		break;
+	case DebugGridTextItem::dungeon:
+		info = dungeon[megaCoords.x][megaCoords.y];
+		break;
+	case DebugGridTextItem::pdungeon:
+		info = pdungeon[megaCoords.x][megaCoords.y];
+		break;
+	case DebugGridTextItem::dflags:
+		info = dflags[megaCoords.x][megaCoords.y];
+		break;
 	case DebugGridTextItem::None:
 		return false;
 	}
diff --git a/Source/debug.h b/Source/debug.h
index c398a0771..daf047625 100644
--- a/Source/debug.h
+++ b/Source/debug.h
@@ -31,6 +31,7 @@ void NextDebugMonster();
 void SetDebugLevelSeedInfos(uint32_t mid1Seed, uint32_t mid2Seed, uint32_t mid3Seed, uint32_t endSeed);
 bool CheckDebugTextCommand(const string_view text);
 bool IsDebugGridTextNeeded();
+bool IsDebugGridInMegatiles();
 bool GetDebugGridText(Point dungeonCoords, char *debugGridTextBuffer);
 
 } // namespace devilution
diff --git a/Source/scrollrt.cpp b/Source/scrollrt.cpp
index 9be1dbe5a..52082112f 100644
--- a/Source/scrollrt.cpp
+++ b/Source/scrollrt.cpp
@@ -1203,9 +1203,15 @@ void DrawView(const Surface &out, Point startPosition)
 		// force redrawing or debug stuff stays on panel on 640x480 resolution
 		force_redraw = 255;
 		char debugGridTextBuffer[10];
+		bool megaTiles = IsDebugGridInMegatiles();
+
 		for (auto m : DebugCoordsMap) {
 			Point dunCoords = { m.first % MAXDUNX, m.first / MAXDUNX };
+			if (megaTiles && (dunCoords.x % 2 == 1 || dunCoords.y % 2 == 1))
+				continue;
 			Point pixelCoords = m.second;
+			if (megaTiles)
+				pixelCoords += Displacement { 0, TILE_HEIGHT / 2 };
 			if (!zoomflag)
 				pixelCoords *= 2;
 			if (debugGridTextNeeded && GetDebugGridText(dunCoords, debugGridTextBuffer)) {
@@ -1215,17 +1221,23 @@ void DrawView(const Surface &out, Point startPosition)
 				DrawString(out, debugGridTextBuffer, { pixelCoords - Displacement { 0, tileSize.height }, tileSize }, UiFlags::ColorRed | UiFlags::AlignCenter | UiFlags::VerticalCenter);
 			}
 			if (DebugGrid) {
-				auto DrawLine = [&out](Point from, Point to, uint8_t col) {
-					int dx = to.x - from.x;
-					int dy = to.y - from.y;
-					int steps = abs(dx) > abs(dy) ? abs(dx) : abs(dy);
-					float ix = dx / (float)steps;
-					float iy = dy / (float)steps;
-					float sx = from.x;
-					float sy = from.y;
-
-					for (int i = 0; i <= steps; i++, sx += ix, sy += iy)
-						out.SetPixel({ (int)sx, (int)sy }, col);
+				auto DrawDebugSquare = [&out](Point center, Displacement hor, Displacement ver, uint8_t col) {
+					auto DrawLine = [&out](Point from, Point to, uint8_t col) {
+						int dx = to.x - from.x;
+						int dy = to.y - from.y;
+						int steps = abs(dx) > abs(dy) ? abs(dx) : abs(dy);
+						float ix = dx / (float)steps;
+						float iy = dy / (float)steps;
+						float sx = from.x;
+						float sy = from.y;
+
+						for (int i = 0; i <= steps; i++, sx += ix, sy += iy)
+							out.SetPixel({ (int)sx, (int)sy }, col);
+					};
+					DrawLine(center - hor, center + ver, col);
+					DrawLine(center + hor, center + ver, col);
+					DrawLine(center - hor, center - ver, col);
+					DrawLine(center + hor, center - ver, col);
 				};
 
 				Displacement hor = { TILE_WIDTH / 2, 0 };
@@ -1236,11 +1248,14 @@ void DrawView(const Surface &out, Point startPosition)
 				}
 				Point center = pixelCoords + hor - ver;
 
+				if (megaTiles) {
+					hor *= 2;
+					ver *= 2;
+				}
+
 				uint8_t col = PAL16_BEIGE;
-				DrawLine(center - hor, center + ver, col);
-				DrawLine(center + hor, center + ver, col);
-				DrawLine(center - hor, center - ver, col);
-				DrawLine(center + hor, center - ver, col);
+
+				DrawDebugSquare(center, hor, ver, col);
 			}
 		}
 	}