Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdeartwork@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 247 insertions, 0 deletions

diff --git a/kscreensaver/kdesavers/firesaverwriter.cpp b/kscreensaver/kdesavers/firesaverwriter.cpp
new file mode 100644
index 00000000..07209884
--- /dev/null
+++ b/kscreensaver/kdesavers/firesaverwriter.cpp
@@ -0,0 +1,247 @@
+/***************************************************************************
+ *   Copyright (C) 2004 by E.Ros                                           *
+ *   rosenric@dei.unipd.it                                                 *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <math.h>
+#include <stdlib.h>
+#include <qimage.h>
+#include <qgl.h>
+#include <qfile.h>
+#include <qstring.h>
+#include <kdebug.h>
+#include <kstandarddirs.h>
+#include <kdeversion.h>
+#include <klocale.h>
+#include "firesaverwriter.h"
+
+
+/* Word: SINGLE WORD */
+
+Word::Word( const char * _text, QMap<char, Symbol *> * sMap, float _scale )
+    : width(0), scale(_scale), cX(0), cY(0), vScale(0), vX(0), vY(0),
+    activateTime(0.0), lifeTime(2), currentTime(0)
+{
+	for ( ; *_text != 0 && *_text != ' '; _text++ )
+	{
+		char c = *_text;
+		if ( !sMap->contains(c) )	//search for a symbol in the map
+			continue;
+		Symbol * symbol = (*sMap)[c];	//get the symbol*
+		width += symbol->scale;		//increase word's half-width
+		symbolList.append( symbol );	//insert it to the list
+	}
+	color[0] = 0;
+	color[1] = 0.8 * drand48();
+	color[2] = 0.2 + 0.8 * drand48();
+	color[3] = 1;
+}
+
+inline void Word::renderWord( double dT )
+{
+	if ( (currentTime += dT) < activateTime )
+		return;
+
+	//update coloring
+	if ( activateTime >= 0 ) {
+		if ( currentTime < activateTime + 0.4 )
+			color[3] = (currentTime - activateTime) / 0.4;
+		else
+			color[3] = 1 - (currentTime - activateTime - 0.4) / (lifeTime - 0.4);
+	} else
+		color[3] = 1 - currentTime / lifeTime;
+
+	//word's global transforms
+	glPushMatrix();
+	glTranslatef( cX - scale * width, cY, 0 );
+	glScalef( scale, scale, 1 );
+	glColor4fv( color );
+
+	//for each symbol draw it!
+	Symbol * symbol = symbolList.first();
+	for( ; symbol; symbol = symbolList.next() )
+		symbol->renderSymbol();
+	glPopMatrix();
+
+	//physical update to position and scale
+	cX += vX * dT;
+	cY += vY * dT;
+	scale += scale * vScale * dT;
+}
+
+inline bool Word::isDead()
+{
+	if ( activateTime > 0 )
+		return (currentTime - activateTime) >= lifeTime;
+	return currentTime >= lifeTime;
+}
+
+
+
+/* Writer: engine that spawns and manages words */
+
+Writer::Writer( QString descFileName )
+    : numTextures(0)
+{
+	wordList.setAutoDelete( true );
+
+	if ( !loadMap( descFileName ) )
+		return;
+
+	QString welcomeString = i18n("Welcome to KDE %1.%2.%3")
+	    .arg(KDE_VERSION_MAJOR)
+	    .arg(KDE_VERSION_MINOR)
+	    .arg(KDE_VERSION_RELEASE);
+	spawnWords(welcomeString, Fun1);
+}
+
+Writer::~ Writer()
+{
+	glDeleteTextures( numTextures, texArray );
+	wordList.clear();
+	QMap<char, Symbol *>::Iterator it = symbolMap.begin();
+	for ( ; it != symbolMap.end(); ++it )
+		delete (Symbol *)it.data();
+}
+
+void Writer::spawnWords( QString phrase, effectType fX )
+{
+	int wordCount = 0;
+	float xCenter = 0,
+	      yCenter = drand48()*40 - 20,
+	      wordsWidth = 0;
+	QPtrList<Word> localWords;
+	while ( phrase.length() > 0 )
+	{
+		QString letters = phrase.section(" ",0,0);
+		Word * word = new Word( letters.latin1(), &symbolMap );
+		wordList.append( word );
+		localWords.append( word );
+		word->cX = xCenter;
+		word->cY = yCenter;
+		switch ( fX ) {
+		    case Fun1:{
+			float	angle = 2*M_PI * drand48(),
+				module = 0.25 * (drand48() + drand48());
+			word->vX = module * cos( angle );
+			word->vY = module * sin( angle );
+			word->vScale = 0.6;
+			word->scale = 0.7 + 0.3*(drand48() + drand48());}
+			word->activateTime = 0.3 * wordCount;
+			//fall to the case below for word spacing
+		    default:
+		    case NoEffect:
+			wordsWidth += word->width;
+			word->cX += wordsWidth;
+			wordsWidth += word->width + 1;
+			break;
+		    case Sequence:
+			word->lifeTime = 1.2;
+			word->activateTime = 0.6 + 0.9 * wordCount;
+//			word->vY = -5;
+			break;
+		}
+		wordCount ++;
+		phrase.remove(0, letters.length() + 1);
+	}
+	if ( localWords.count() < 1 )
+		return;
+	//some computations to 'center' the string
+	float displace = -(wordsWidth - 1) / 2;
+	Word * word = localWords.first();
+	for( ; word; word = localWords.next() )
+		word->cX += displace;
+}
+
+void Writer::render( double dT )
+{
+    if ( !numTextures )
+	return;
+
+    glEnable( GL_TEXTURE_2D );
+
+    glPushMatrix();
+    glScalef( 0.6, 0.6, 1.0 );
+    Word * word = wordList.first();
+    while( word ) {
+	word->renderWord( dT );
+	if ( word->isDead() ) {
+		wordList.remove();
+		word = wordList.current();
+	} else
+		word = wordList.next();
+    }
+    glPopMatrix();
+}
+
+/* loadMap()
+ *  parses the description file to create the internal symbols map.
+ *  This map is then used when building words.
+ **/
+bool Writer::loadMap( QString descFile )
+{
+    QFile desc( locate("data","kfiresaver/"+descFile) );
+    if ( !desc.open( IO_ReadOnly ) )
+	return false;
+
+    unsigned int currentNumber;
+    float xres = 0, yres = 0;
+    bool generatedFirst = false;
+
+    while ( !desc.atEnd() )
+    {
+	QString line;
+	int count = desc.readLine( line, 100 );
+	//skip comments / invalid lines
+	if ( count < 6 || line.at(0) == '#')
+	    continue;
+	//load texture maps
+	if ( line.at(0) == '"' && numTextures < 15 )
+	{
+	    //load and generate texture
+	    QString fileName = line.section("\"", 1,1 );
+	    QImage tmp;
+	    if ( !tmp.load( locate("data","kfiresaver/"+fileName) ) ) {
+		kdWarning() << "can't load filename:" << fileName << endl;
+		generatedFirst = false;
+		continue;
+	    }
+	    glGenTextures( 1, &currentNumber );
+	    texArray[ numTextures++ ] = currentNumber;
+	    glBindTexture(GL_TEXTURE_2D, currentNumber);
+	    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+	    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+	    QImage texture = QGLWidget::convertToGLFormat( tmp );
+	    xres = (float)texture.width();
+	    yres = (float)texture.height();
+	    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (int)xres, (int)yres, 0,
+		GL_RGBA, GL_UNSIGNED_BYTE, texture.bits());
+	    generatedFirst = true;
+	    continue;
+	}
+	if  ( !generatedFirst )
+	    continue;
+	if ( line.contains(' ') != 4 ) {
+	    kdWarning() << "wrong line on symbols.desc (4 spaces expected):" << endl;
+	    kdWarning() << " '" << line << "'" << endl;
+	    continue;
+	}
+	//parse the line describing a symbol and create it
+	char p = *(line.latin1());
+	if ( symbolMap.contains(p) )
+	    continue;
+	float left = (float)(line.section(" ",1,1).toInt())/xres,
+	      top = (float)(line.section(" ",2,2).toInt())/yres,
+	      right = (float)(line.section(" ",3,3).toInt() + 1)/xres,
+	      bottom = (float)(line.section(" ",4,4).toInt() + 1)/yres;
+	symbolMap[p] = new Symbol( currentNumber, left,top,right,bottom );
+    }
+
+    return symbolMap.size() > 0;
+}