From 5f79a8b266cfb1f6c3b052a6431600511e862698 Mon Sep 17 00:00:00 2001
From: Paul Gilbert <dreammaster@scummvm.org>
Date: Wed, 1 Jun 2022 20:26:51 -0700
Subject: [PATCH] MM: MM1: Load Xeen UI background

---
 engines/mm/mm1/mm1.cpp            | 51 +++++++++++++++++++++++++++++--
 engines/mm/mm1/mm1.h              |  4 +++
 engines/mm/mm1/views_enh/game.cpp | 13 ++++++--
 3 files changed, 64 insertions(+), 4 deletions(-)

diff --git a/engines/mm/mm1/mm1.cpp b/engines/mm/mm1/mm1.cpp
index c90d75b6cce..fd931234dbd 100644
--- a/engines/mm/mm1/mm1.cpp
+++ b/engines/mm/mm1/mm1.cpp
@@ -22,11 +22,14 @@
 #include "common/scummsys.h"
 #include "common/config-manager.h"
 #include "common/debug-channels.h"
-#include "common/events.h"
+#include "common/file.h"
+#include "common/system.h"
 #include "engines/util.h"
+#include "graphics/palette.h"
 #include "mm/mm1/mm1.h"
 #include "mm/mm1/console.h"
 #include "mm/mm1/gfx/gfx.h"
+#include "mm/xeen/files.h"
 
 namespace MM {
 namespace MM1 {
@@ -46,8 +49,15 @@ MM1Engine::~MM1Engine() {
 Common::Error MM1Engine::run() {
 	// Initialize graphics mode
 	initGraphics(320, 200);
-	Gfx::GFX::setEgaPalette(0);
 
+	if (isEnhanced()) {
+		if (!setupEnhanced())
+			return Common::kNoError;
+	} else {
+		setupNormal();
+	}
+
+	// Setup console
 	setDebugger(new Console());
 
 	// Load globals
@@ -58,5 +68,42 @@ Common::Error MM1Engine::run() {
 	return Common::kNoError;
 }
 
+bool MM1Engine::isEnhanced() const {
+	return (_gameDescription->features & GF_ENHANCED) != 0;
+}
+
+void MM1Engine::setupNormal() {
+	Gfx::GFX::setEgaPalette(0);
+}
+
+bool MM1Engine::setupEnhanced() {
+	if (!Common::File::exists("dark.cc")) {
+		GUIErrorMessage(
+			"In order to run in Enhanced mode,  please copy dark.cc "
+			"from a copy of World of Xeen\n"
+			"or Dark Side of Xeen to your Might and Magic 1 game folder"
+		);
+
+		return false;
+	}
+
+	// Add the Dark Side dark.cc archive
+	::MM::Xeen::CCArchive *darkCC = new ::MM::Xeen::CCArchive(
+		"dark.cc", "dark", true);
+	SearchMan.add("dark", darkCC);
+
+	// Load the palette
+	Common::File f;
+	if (!f.open("dark.pal"))
+		error("Could not load palette");
+
+	byte pal[PALETTE_SIZE];
+	for (int i = 0; i < PALETTE_SIZE; ++i)
+		pal[i] = f.readByte() << 2;
+	g_system->getPaletteManager()->setPalette(pal, 0, PALETTE_COUNT);
+
+	return true;
+}
+
 } // End of namespace Xeen
 } // End of namespace MM
diff --git a/engines/mm/mm1/mm1.h b/engines/mm/mm1/mm1.h
index 1dce4bd2138..2d1f2dd8d77 100644
--- a/engines/mm/mm1/mm1.h
+++ b/engines/mm/mm1/mm1.h
@@ -42,6 +42,9 @@ private:
 	// Engine APIs
 	Common::Error run() override;
 
+	bool isEnhanced() const;
+	void setupNormal();
+	bool setupEnhanced();
 public:
 	Globals _globals;
 public:
@@ -57,6 +60,7 @@ public:
 	int getRandomNumber(int maxNumber) {
 		return _randomSource.getRandomNumber(maxNumber);
 	}
+
 	Common::String getTargetName() const {
 		return _targetName;
 	}
diff --git a/engines/mm/mm1/views_enh/game.cpp b/engines/mm/mm1/views_enh/game.cpp
index 58357a5a110..4589ee6b694 100644
--- a/engines/mm/mm1/views_enh/game.cpp
+++ b/engines/mm/mm1/views_enh/game.cpp
@@ -19,6 +19,7 @@
  *
  */
 
+#include "common/file.h"
 #include "mm/mm1/views_enh/game.h"
 #include "mm/mm1/globals.h"
 #include "mm/mm1/meta_engine.h"
@@ -42,8 +43,16 @@ bool Game::msgUnfocus(const UnfocusMessage &msg) {
 }
 
 void Game::draw() {
-	if (_needsRedraw)
-		clearSurface();
+	if (_needsRedraw) {
+		// Load the Xeen background
+		Common::File f;
+		if (!f.open("back.raw"))
+			error("Could not load background");
+
+		Graphics::Surface s = getSurface();
+		f.read((byte *)s.getPixels(), s.w * s.h);
+	}
+
 	UIElement::draw();
 }