TITANIC: Adding more video surface methods

engines/titanic/support/image_decoders.cpp

@@ -36,7 +36,7 @@ void CJPEGDecode::decode(OSVideoSurface &surface, const CString &name) {
 	// Resize the surface if necessary
 	if (!surface.hasSurface() || surface.getWidth() != srcSurf->w 
 			|| surface.getHeight() != srcSurf->h)
-		surface.resize(srcSurf->w, srcSurf->h);
+		surface.recreate(srcSurf->w, srcSurf->h);
 
 	// Convert the decoded surface to the correct pixel format, and then copy it over
 	surface.lock();
@@ -63,7 +63,7 @@ void CTargaDecode::decode(OSVideoSurface &surface, const CString &name) {
 	// Resize the surface if necessary
 	if (!surface.hasSurface() || surface.getWidth() != srcSurf->w
 			|| surface.getHeight() != srcSurf->h)
-		surface.resize(srcSurf->w, srcSurf->h);
+		surface.recreate(srcSurf->w, srcSurf->h);
 
 	// Convert the decoded surface to the correct pixel format, and then copy it over
 	surface.lock();

engines/titanic/support/movie.cpp

@@ -175,7 +175,7 @@ void OSMovie::decodeFrame() {
 
 	// If the video surface doesn't yet have an underlying surface, create it
 	if (!videoSurface->hasSurface())
-		videoSurface->resize(frame->w, frame->h);
+		videoSurface->recreate(frame->w, frame->h);
 
 	// Lock access to the surface
 	videoSurface->lock();

engines/titanic/support/video_surface.cpp

@@ -296,7 +296,14 @@ int OSVideoSurface::getPitch() {
 	return _ddSurface->getPitch();
 }
 
-void OSVideoSurface::resize(int width, int height) {
+int OSVideoSurface::getBpp() {
+	if (!loadIfReady())
+		error("Could not load resource");
+
+	return getPixelDepth();
+}
+
+void OSVideoSurface::recreate(int width, int height) {
 	freeSurface();
 
 	_screenManager->resizeSurface(this, width, height);
@@ -304,9 +311,19 @@ void OSVideoSurface::resize(int width, int height) {
 		_videoSurfaceCounter += _ddSurface->getSize();
 }
 
+void OSVideoSurface::resize(int width, int height) {
+	if (!_ddSurface || _ddSurface->getWidth() != width || 
+			_ddSurface->getHeight() != height)
+		recreate(width, height);
+}
+
+void OSVideoSurface::detachSurface() {
+	_ddSurface = nullptr;
+}
+
 int OSVideoSurface::getPixelDepth() {
 	if (!loadIfReady())
-		assert(0);
+		error("Could not load resource");
 
 	lock();
 	
@@ -360,6 +377,13 @@ uint16 OSVideoSurface::getPixel(const Common::Point &pt) {
 	}
 }
 
+void OSVideoSurface::setPixel(const Point &pt, uint pixel) {
+	assert(getPixelDepth() == 2);
+
+	uint16 *pixelP = (uint16 *)_rawSurface->getBasePtr(pt.x, pt.y);
+	*pixelP = pixel;
+}
+
 void OSVideoSurface::changePixel(uint16 *pixelP, uint16 *color, byte srcVal, bool remapFlag) {
 	assert(getPixelDepth() == 2);
 	const Graphics::PixelFormat &destFormat = _ddSurface->getFormat();
@@ -391,9 +415,17 @@ void OSVideoSurface::shiftColors() {
 	// we already convert 16-bit surfaces as soon as they're loaded
 }
 
+void OSVideoSurface::clear() {
+	if (!loadIfReady())
+		error("Could not load resource");
+
+}
+
 void OSVideoSurface::playMovie(uint flags, CVideoSurface *surface) {
 	if (loadIfReady() && _movie)
 		_movie->play(flags, surface);
+
+	_ddSurface->fill(nullptr, 0);
 }
 
 void OSVideoSurface::playMovie(uint startFrame, uint endFrame, int v3, bool v4) {

engines/titanic/support/video_surface.h

@@ -129,12 +129,27 @@ public:
 	 * Returns the pitch of the surface in bytes
 	 */
 	virtual int getPitch() = 0;
-	
+
 	/**
-	 * Reiszes the surface
+	 * Returns the bytes per pixel of the surface
+	 */
+	virtual int getBpp() = 0;
+
+	/**
+	 * Recreates the surface
+	 */
+	virtual void recreate(int width, int height) = 0;
+
+	/**
+	 * Resizes the surface
 	 */
 	virtual void resize(int width, int height) = 0;
 
+	/**
+	 * Detachs the underlying raw surface
+	 */
+	virtual void detachSurface() = 0;
+
 	/**
 	 * Returns the number of bytes per pixel in the surface
 	 */
@@ -145,6 +160,12 @@ public:
 	 */
 	virtual uint16 getPixel(const Common::Point &pt) = 0;
 
+
+	/**
+	 * Sets a pixel at a specified position within the surface
+	 */
+	virtual void setPixel(const Point &pt, uint pixel) = 0;
+
 	/**
 	 * Change a pixel
 	 */
@@ -155,6 +176,11 @@ public:
 	 */
 	virtual void shiftColors() = 0;
 
+	/**
+	 * Clears the entire surface to black
+	 */
+	virtual void clear() = 0;
+
 	/**
 	 * Plays a movie, loading it from the specified _resource
 	 * if not already loaded
@@ -305,10 +331,25 @@ public:
 	virtual int getPitch();
 
 	/**
-	 * Reiszes the surface
+	 * Returns the bytes per pixel of the surface
+	 */
+	virtual int getBpp();
+
+	/**
+	 * Recreates the surface with the designated size
+	 */
+	virtual void recreate(int width, int height);
+
+	/**
+	 * Resizes the surface
 	 */
 	virtual void resize(int width, int height);
 
+	/**
+	 * Detachs the underlying raw surface
+	 */
+	virtual void detachSurface();
+
 	/**
 	 * Returns the number of bytes per pixel in the surface
 	 */
@@ -317,7 +358,12 @@ public:
 	/**
 	 * Gets the pixel at the specified position within the surface
 	 */
-	virtual uint16 getPixel(const Common::Point &pt);
+	virtual uint16 getPixel(const Point &pt);
+
+	/**
+	 * Sets a pixel at a specified position within the surface
+	 */
+	virtual void setPixel(const Point &pt, uint pixel);
 
 	/**
 	 * Change a pixel
@@ -329,6 +375,11 @@ public:
 	 */
 	virtual void shiftColors();
 
+	/**
+	 * Clears the entire surface to black
+	 */
+	virtual void clear();
+
 	/**
 	 * Plays a movie, loading it from the specified _resource
 	 * if not already loaded