summaryrefslogtreecommitdiffstats
path: root/kscreensaver/kdesavers/firesaverwriter.cpp
blob: 82b592d3bea78537d12a189d23d0250f7d900a6c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
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 <tqimage.h>
#include <tqgl.h>
#include <tqfile.h>
#include <tqstring.h>
#include <kdebug.h>
#include <kstandarddirs.h>
#include <kdeversion.h>
#include <klocale.h>
#include "firesaverwriter.h"


/* Word: SINGLE WORD */

Word::Word( const char * _text, TQMap<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( TQString descFileName )
    : numTextures(0)
{
	wordList.setAutoDelete( true );

	if ( !loadMap( descFileName ) )
		return;

	TQString welcomeString = i18n("Welcome to KDE %1.%2.%3")
	    .tqarg(KDE_VERSION_MAJOR)
	    .tqarg(KDE_VERSION_MINOR)
	    .tqarg(KDE_VERSION_RELEASE);
	spawnWords(welcomeString, Fun1);
}

Writer::~ Writer()
{
	glDeleteTextures( numTextures, texArray );
	wordList.clear();
	TQMap<char, Symbol *>::Iterator it = symbolMap.begin();
	for ( ; it != symbolMap.end(); ++it )
		delete (Symbol *)it.data();
}

void Writer::spawnWords( TQString phrase, effectType fX )
{
	int wordCount = 0;
	float xCenter = 0,
	      yCenter = drand48()*40 - 20,
	      wordsWidth = 0;
	TQPtrList<Word> localWords;
	while ( phrase.length() > 0 )
	{
		TQString 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( TQString descFile )
{
    TQFile 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() )
    {
	TQString 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
	    TQString fileName = line.section("\"", 1,1 );
	    TQImage 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 );
	    TQImage texture = TQGLWidget::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;
}