using now nicer font selection which also allows specification of color and size

asteroids/View.cc

@@ -40,7 +40,7 @@ int View::OnInit (int argc, char* argv[]) {
 	mOverlayManager.Register (mConsoleOverlay, GameStateMainMenu);
 	*/
 
-	LoadFont("AldotheApache.ttf", 20);
+	LoadFont("AldotheApache.ttf size=20 color=#000000");
 
 	// This is a simple star field that makes the game so spacy
 	int i;
@@ -411,7 +411,7 @@ void View::DrawUiMainMenu() {
 void View::DrawUiGameRunning() {
 	// We choose a different font and also draw it aligned to the right as this
 	// looks nicer with the points
-	SelectFont ("AldotheApache.ttf");
+	SelectFont ("AldotheApache.ttf size=20 color=#ffffff");
 	SetFontJustification (Engine::FontJustificationRight);
 
 	std::ostringstream out_stream;
@@ -530,9 +530,9 @@ void View::DrawUiHighscore() {
 		// the name)
 		if (GetModel()->mNewestHighscoreEntryIndex < GetModel()->mHighscoreList.size()
 				&& GetModel()->mNewestHighscoreEntryIndex == i) {
-			SetFontColor (224./255., 200/255., 0.);
+			SelectFont("console.ttf color=#e8d500");
 			Engine::DrawGLString ( x, y, out_stream.str().c_str());
-			SetFontColor (1., 1., 1.);
+			SelectFont("console.ttf color=#ffffff");
 		} else {
 			Engine::DrawGLString ( x, y, out_stream.str().c_str());
 		}
@@ -555,6 +555,7 @@ void View::DrawUiEnterPlayername() {
 	// Enter your name
 	std::string player_name = GetModel()->GetPlayerName();
 
+	SelectFont("console.ttf");
 	Engine::GUI::Label (1, "Enter your name: ", screen_right * 0.5 - 100, 250);
 
 	if (Engine::GUI::LineEdit (2, screen_right * 0.5 + 20, 238, player_name, 16)) {

engine/ViewBase.cc

@@ -55,7 +55,6 @@ int ViewBase::OnInit (int argc, char* argv[]) {
 	
 	LoadFont ("console.ttf");
 	mCurrentFont = mFonts["console.ttf"];
-	SetFontColor (1., 1., 1.);
 
 	// Overlays
 	OverlayBasePtr console_overlay(new SimpleConsoleOverlay);
@@ -189,20 +188,107 @@ void ViewBase::PostDraw() {
 }
 
 /* Fonts */
-bool ViewBase::LoadFont (const char *font_name, float point_size) {
+
+/** \brief Parses font specifications strings into its values
+ *
+ * Fonts can be specified by strings such as
+ *   name=default.ttf color=#ff0000 size=12
+ *   color=#ff00ff size=12 otherfont.ttf
+ *   myfont.ttf
+ * for which the appropriate values will be parsed. Default size is 12 and
+ * default color is white (#ffffff)
+ */
+void parse_font_spec_string (const std::string &spec_string,
+		std::string &font_name,
+		float font_color[3],
+		float *font_size) {
+	// set default values
+	font_name = "default.ttf";
+	font_color[0] = 1.f;
+	font_color[1] = 1.f;
+	font_color[2] = 1.f;
+	*font_size = 12.f;
+
+	// perform the actual parsing
+	std::string::size_type pos = 0;
+
+	while (pos < spec_string.size()) {
+		std::string::size_type next_start = spec_string.find_first_not_of(" \t", pos);
+		// if we don't find anything we break out of this loop
+		if (next_start == std::string::npos)
+			break;
+
+		// find the next token
+		std::string::size_type next_end = spec_string.find_first_of("\t ", next_start);
+		std::string token (spec_string.substr(next_start, next_end - next_start));
+
+		// If no id was given it is automatically set to name
+		std::string id("name");
+		std::string value(token);
+
+		// Split the token into id and value if there is an '=' sign.
+		if (token.find('=', 0) != std::string::npos) {
+			id = token.substr(0, token.find('=',0));
+			value = token.substr(id.size() + 1, token.size());
+		}
+
+		// std::cout << "id = " << id << " value = " << value << std::endl;
+
+		if (id == "name")
+			font_name = value;
+		else if (id == "size") {
+			std::istringstream istr(value);
+			istr >> *font_size;	
+		} else if (id == "color") {
+			// we assume #RRGGBB specification
+			if (value[0] != '#' || value.size() != 7)
+				LogError ("Invalid font color specification '%s'. Please specify as #rrggbb!", value.c_str());
+
+			// convert the color string to float values
+			int num;
+			std::istringstream istr(value.substr(1, 2));
+			istr >> std::hex >> num;
+			font_color[0] = static_cast<float>(num) / 255.;
+
+			istr.clear();
+			istr.str(value.substr(3,2));
+			istr >> std::hex >> num;
+			font_color[1] = static_cast<float>(num) / 255.;
+
+			istr.clear();
+			istr.str(value.substr(5,2));
+			istr >> std::hex >> num;
+			font_color[2] = static_cast<float>(num) / 255.;
+		}
+
+		pos = next_end;
+	}
+}
+
+bool ViewBase::LoadFont (const std::string &font_spec_string) {
+	// font_spec_string can be of the form
+	// (name=)<name> (color=<color>) (size=<size>)
+
+	std::string font_name;
+	float font_size = 12.;
+	float font_color[3] = {1., 1., 1.};
+
+	parse_font_spec_string(font_spec_string, font_name, font_color, &font_size);	
+
 	std::string font_path ("./data/fonts/");
 	font_path += font_name;
 
-	LogDebug ("Loading font %s size %f from %s", font_name, point_size, font_path.c_str());
+	LogDebug ("Loading font %s color (%1.2f, %1.2f, %1.2f) size %f from %s", font_name.c_str(), font_color[0], font_color[1], font_color[2], font_size, font_path.c_str());
 
-	OGLFT::Monochrome *font = new OGLFT::Monochrome (font_path.c_str(), point_size);
+	OGLFT::Monochrome *font = new OGLFT::Monochrome (font_path.c_str(), font_size);
 	if ( font == 0 || !font->isValid() ) {
 		LogError ("Could not load font %s!", font_path.c_str());
 		return false;
 	}
-	font->setForegroundColor(1., 1., 1.);
 
-	mFonts.insert(std::make_pair<std::string, OGLFT::Monochrome*>(font_name, font));
+	font->setForegroundColor(font_color[0], font_color[1], font_color[2]);
+
+	mFonts.insert(std::make_pair<std::string, OGLFT::Monochrome*>(font_spec_string, font));
 
 	return true;
 }
@@ -217,8 +303,10 @@ void ViewBase::SelectFont (const char *font) {
 		return;
 	}
 
-	LogDebug ("Font %s not found, trying to load it", font);
+	LogDebug ("Selecting font %s failed, trying to load it", font);
+	LogDebug ("font count = %d", mFonts.size());
 	if (LoadFont (font)) {
+	LogDebug ("font count = %d", mFonts.size());
 		font_iter = mFonts.find(font);
 
 		assert (mFonts.find(font) != mFonts.end());
@@ -232,6 +320,8 @@ void ViewBase::SelectFont (const char *font) {
 }
 
 void ViewBase::SetFontJustification (FontJustification justification) {
+	assert (mCurrentFont != NULL);
+
 	if (justification == FontJustificationRight)
 		mCurrentFont->setHorizontalJustification(OGLFT::Face::RIGHT);
 	else if (justification == FontJustificationCenter) 
@@ -240,11 +330,6 @@ void ViewBase::SetFontJustification (FontJustification justification) {
 
 }
 
-void ViewBase::SetFontColor (float r, float g, float b) {
-	assert (mCurrentFont);
-	mCurrentFont->setForegroundColor(r, g, b);
-};
-
 void ViewBase::DrawGLString (float x, float y, const char* str) {
 	glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
 	mCurrentFont->draw (x, y, str);

engine/ViewBase.h

@@ -36,14 +36,20 @@ class ViewBase : public Module{
 		virtual void Draw ();
 
 		/* Fonts */
-		bool LoadFont (const char *font_name, float point_size=12);
+
-		void SelectFont (const char *font_name);
+		/** \brief Selects a font with a given specification or loads it if it was not found
-		void SetFontJustification (FontJustification justification);
-		/** \brief Sets the color of the current font
 		 * 
-		 * \note This function should be avoided as the glyphs have to be re-rendered
+		 * Fonts can be specified by strings such as
+		 *   "name=default.ttf color=#ff0000 size=12"
+		 *   "color=#ff00ff size=12 otherfont.ttf"
+		 *   "myfont.ttf"
+		 * for which the appropriate values will be parsed.
+		 *
+		 * Default size is 12 and default color is white (#ffffff).
 		 */
-		void SetFontColor (float r, float g, float b);
+		void SelectFont (const char *font_spec);
+		void SetFontJustification (FontJustification justification);
+
 		/** \brief Draws a string at the given position using current projection
 		 * and modelview matrices */
 		void DrawGLString (float x, float y, const char* str);
@@ -94,6 +100,8 @@ class ViewBase : public Module{
 		void DrawGrid ();
 		bool mDrawGrid;
 
+		/** \brief Loads a font that was not yet loaded */
+		bool LoadFont (const std::string &font_spec_string);
 
 		ModelBase *mModel;
 		CameraBase *mCamera;