TITANIC: Implementing text cursor drawing

5 files changed, 104 insertions, 20 deletions

diff --git a/engines/titanic/support/screen_manager.cpp b/engines/titanic/support/screen_manager.cpp
index 3005bdd446..0c9d3ab4e0 100644
--- a/engines/titanic/support/screen_manager.cpp
+++ b/engines/titanic/support/screen_manager.cpp
@@ -140,8 +140,6 @@ CVideoSurface *OSScreenManager::getSurface(SurfaceNum surfaceNum) const {
 		return nullptr;
 }
 
-void OSScreenManager::proc9() {}
-
 void OSScreenManager::fillRect(SurfaceNum surfaceNum, Rect *rect, byte r, byte g, byte b) {
 	DirectDrawSurface *surface = getDDSurface(surfaceNum);
 	if (!surface)
diff --git a/engines/titanic/support/screen_manager.h b/engines/titanic/support/screen_manager.h
index 7fe60d20b7..b963fcd3d6 100644
--- a/engines/titanic/support/screen_manager.h
+++ b/engines/titanic/support/screen_manager.h
@@ -92,7 +92,11 @@ public:
 	virtual void proc6() = 0;
 	virtual void proc7() = 0;
 	virtual CVideoSurface *getSurface(SurfaceNum surfaceNum) const = 0;
-	virtual void proc9() = 0;
+
+	/**
+	 * Return the front render surface
+	 */
+	virtual CVideoSurface *getFrontRenderSurface() const = 0;
 	
 	/**
 	 * Fill an area with a specific color
@@ -222,7 +226,14 @@ public:
 	virtual void proc6();
 	virtual void proc7();
 	virtual CVideoSurface *getSurface(SurfaceNum surfaceNum) const;
-	virtual void proc9();
+
+	/**
+	 * Return the front render surface
+	 */
+	virtual CVideoSurface *getFrontRenderSurface() const {
+		return _frontRenderSurface;
+	}
+
 
 	/**
 	 * Fill an area with a specific color
diff --git a/engines/titanic/support/text_cursor.cpp b/engines/titanic/support/text_cursor.cpp
index 7e69a2239a..c3d2f20f84 100644
--- a/engines/titanic/support/text_cursor.cpp
+++ b/engines/titanic/support/text_cursor.cpp
@@ -23,13 +23,15 @@
 #include "common/textconsole.h"
 #include "titanic/support/text_cursor.h"
 #include "titanic/support/screen_manager.h"
+#include "titanic/titanic.h"
 
 namespace Titanic {
 
 CTextCursor::CTextCursor(CScreenManager *screenManager) : 
-		_screenManager(screenManager), _priorTicks(300), _active(false),
-		_field24(0), _size(2, 10), _field44(0), _field48(0), _field4C(0),
-		_field54(-1) {
+		_screenManager(screenManager), _active(false), _blinkVisible(false),
+		_backRenderSurface(nullptr), _frontRenderSurface(nullptr),
+		_blinkDelay(300), _size(2, 10), _priorBlinkTime(0),
+		_cursorR(0), _cursorG(0), _cursorB(0), _mode(-1) {
 	screenManager->createSurface(10, 10);
 }
 
@@ -37,4 +39,52 @@ CTextCursor::~CTextCursor() {
 	delete _surface;
 }
 
+void CTextCursor::setColor(byte r, byte g, byte b) {
+	_cursorR = r;
+	_cursorG = g;
+	_cursorB = b;
+}
+
+void CTextCursor::show() {
+	_backRenderSurface = _screenManager->getSurface(SURFACE_BACKBUFFER);
+	_frontRenderSurface = _screenManager->getFrontRenderSurface();
+	_active = true;
+	_priorBlinkTime = g_vm->_events->getTicksCount();
+}
+
+void CTextCursor::hide() {
+	_active = false;
+}
+
+void CTextCursor::draw() {
+	if (!_active)
+		return;
+
+	// Handle updating whether the blinking cursor is visible or not
+	uint newTicks = g_vm->_events->getTicksCount();
+	while (newTicks > (_priorBlinkTime + _blinkDelay)) {
+		_priorBlinkTime += _blinkDelay;
+		_blinkVisible = !_blinkVisible;
+	}
+
+	if (_blinkVisible) {
+		Rect cursorRect = getCursorBounds();
+		_surface->blitFrom(Common::Point(0, 0), _backRenderSurface, &cursorRect);
+	
+		if (!_screenBounds.isEmpty())
+			// Limit the cursor rect to only within designated screen area
+			cursorRect.constrain(_screenBounds);
+
+		if (!cursorRect.isEmpty()) {
+			// Draw cursor onto the screen
+			_backRenderSurface->_ddSurface->fillRect(&cursorRect,
+				_cursorR, _cursorG, _cursorB);
+		}
+	}
+
+	if (_active && _blinkVisible) {
+		_screenManager->blitFrom(SURFACE_BACKBUFFER, _surface, &_pos);
+	}
+}
+
 } // End of namespace Titanic
diff --git a/engines/titanic/support/text_cursor.h b/engines/titanic/support/text_cursor.h
index c9fcfa35dd..d8c6ac0653 100644
--- a/engines/titanic/support/text_cursor.h
+++ b/engines/titanic/support/text_cursor.h
@@ -34,17 +34,20 @@ class CVideoSurface;
 class CTextCursor {
 private:
 	CScreenManager *_screenManager;
+	CVideoSurface *_backRenderSurface;
+	CVideoSurface *_frontRenderSurface;
 	Point _pos;
-	Rect _bounds;
-	uint _priorTicks;
-	int _field24;
+	Rect _screenBounds;
+	uint _blinkDelay;
+	bool _blinkVisible;
 	Point _size;
 	Point _screenTopLeft;
-	int _field44;
-	int _field48;
-	int _field4C;
+	uint _priorBlinkTime;
+	byte _cursorR;
+	byte _cursorG;
+	byte _cursorB;
 	CVideoSurface *_surface;
-	int _field54;
+	int _mode;
 public:
 	bool _active;
 public:
@@ -71,24 +74,46 @@ public:
 	/**
 	 * Set bounds
 	 */
-	void setBounds(const Rect &r) { _bounds = r; }
+	void setBounds(const Rect &r) { _screenBounds = r; }
 
 	/**
 	 * Clear the bounds
 	 */
-	void clearBounds() { _bounds.clear(); }
+	void clearBounds() { _screenBounds.clear(); }
 
 	/**
-	 * Set the prior ticks
+	 * Set the blinking rate
 	 */
-	void setTicks(uint ticks) { _priorTicks = ticks; }
+	void setBlinkRate(uint ticks) { _blinkDelay = ticks; }
+
+	/**
+	 * Set the cursor color
+	 */
+	void setColor(byte r, byte g, byte b);
 
 	/**
 	 * Returns whether the text cursor is active
 	 */
 	bool isActive() const { return _active; }
 
-	int get54() const { return _field54; }
+	int getMode() const { return _mode; }
+
+	void setMode(int mode) { _mode = mode; }
+
+	/**
+	 * Show the text cursor
+	 */
+	void show();
+
+	/**
+	 * Hide the text cursor
+	 */
+	void hide();
+
+	/**
+	 * Update and draw the cursor if necessary
+	 */
+	void draw();
 };
 
 } // End of namespace Titanic
diff --git a/engines/titanic/support/video_surface.h b/engines/titanic/support/video_surface.h
index 2ec2c9ddba..d7061895a5 100644
--- a/engines/titanic/support/video_surface.h
+++ b/engines/titanic/support/video_surface.h
@@ -55,7 +55,6 @@ protected:
 protected:
 	CScreenManager *_screenManager;
 	CResourceKey _resourceKey;
-	DirectDrawSurface *_ddSurface;
 	Graphics::ManagedSurface *_rawSurface;
 	bool _pendingLoad;
 	void *_field40;
@@ -66,6 +65,7 @@ protected:
 	int _lockCount;
 public:
 	CMovie *_movie;
+	DirectDrawSurface *_ddSurface;
 	bool _blitFlag;
 	bool _blitStyleFlag;
 public: