aboutsummaryrefslogtreecommitdiff
path: root/engines/lastexpress/data/subtitle.cpp
blob: 0be832cbdd80b4efb59dda2cd2842dfd0b6051b2 (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
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

// Based on the Xentax Wiki documentation:
// http://wiki.xentax.com/index.php/The_Last_Express_SBE

#include "lastexpress/data/subtitle.h"

#include "lastexpress/data/font.h"

#include "lastexpress/debug.h"

#include "common/debug.h"
#include "common/rect.h"
#include "common/stream.h"
#include "common/textconsole.h"

namespace LastExpress {

//////////////////////////////////////////////////////////////////////////
// Subtitle
//////////////////////////////////////////////////////////////////////////
class Subtitle {
public:
	Subtitle() : _timeStart(0), _timeStop(0), _topLength(0), _topText(NULL),
		_bottomLength(0), _bottomText(NULL) {}
	~Subtitle() { reset(); }

	bool load(Common::SeekableReadStream *in);
	Common::Rect draw(Graphics::Surface *surface, Font *font);

	uint16 getTimeStart() const { return _timeStart; }
	uint16 getTimeStop() const { return _timeStop; }

private:
	uint16 _timeStart;    ///< display start time
	uint16 _timeStop;     ///< display stop time

	uint16 _topLength;    ///< top line length
	uint16 *_topText;     ///< bottom line length

	uint16 _bottomLength; ///< top line (UTF-16 string)
	uint16 *_bottomText;  ///< bottom line (UTF-16 string)

	void reset();
};

void Subtitle::reset() {
	delete[] _topText;
	delete[] _bottomText;
	_topText = NULL;
	_bottomText = NULL;
}

template<typename T>
T *newArray(size_t n) {
	if (n <= (size_t)-1 / sizeof(T))
		return new T[n];

	// n is too large
	return NULL;
}

bool Subtitle::load(Common::SeekableReadStream *in) {
	reset();

	if (!in)
		return false;

	// Read the display times
	_timeStart = in->readUint16LE();
	_timeStop = in->readUint16LE();

	// Read the text lengths
	_topLength = in->readUint16LE();
	_bottomLength = in->readUint16LE();

	// Create the buffers
	if (_topLength) {
		_topText = newArray<uint16>(_topLength + 1);
		if (!_topText)
			return false;

		_topText[_topLength] = 0;
	}
	if (_bottomLength) {
		_bottomText = newArray<uint16>(_bottomLength + 1);
		if (!_bottomText)
			return false;

		_bottomText[_bottomLength] = 0;
	}

	// Read the texts
	for (int i = 0; i < _topLength; i++)
		_topText[i] = in->readUint16LE();
	for (int i = 0; i < _bottomLength; i++)
		_bottomText[i] = in->readUint16LE();

	debugC(9, kLastExpressDebugSubtitle, "  %d -> %d:", _timeStart, _timeStop);
	if (_topLength)
		debugC(9, kLastExpressDebugSubtitle, "\t%ls", (wchar_t *)_topText);
	if (_bottomLength)
		debugC(9, kLastExpressDebugSubtitle, "\t%ls", (wchar_t *)_bottomText);

	return true;
}

Common::Rect Subtitle::draw(Graphics::Surface *surface, Font *font) {
	Common::Rect rectTop, rectBottom;

	//FIXME find out proper subtitles coordinates (and hope it's hardcoded and not stored in the sequence or animation)
	rectTop = font->drawString(surface, 100, 100, _topText, _topLength);
	rectBottom = font->drawString(surface, 100, 300, _bottomText, _bottomLength);

	rectTop.extend(rectBottom);

	return rectTop;
}


//////////////////////////////////////////////////////////////////////////
// SubtitleManager
//////////////////////////////////////////////////////////////////////////
SubtitleManager::SubtitleManager(Font *font) : _font(font), _maxTime(0), _currentIndex(-1), _lastIndex(-1) {}

SubtitleManager::~SubtitleManager() {
	reset();

	// Zero passed pointers
	_font = NULL;
}

void SubtitleManager::reset() {
	for (int i = 0; i < (int)_subtitles.size(); i++)
		delete _subtitles[i];

	_subtitles.clear();
	_currentIndex = -1;
	_lastIndex = -1;
}

bool SubtitleManager::load(Common::SeekableReadStream *stream) {
	if (!stream)
		return false;

	reset();

	// Read header to get the number of subtitles
	uint32 numSubtitles = stream->readUint16LE();
	if (stream->eos())
		error("[SubtitleManager::load] Cannot read from subtitle file");

	debugC(3, kLastExpressDebugSubtitle, "Number of subtitles in file: %d", numSubtitles);

	// TODO: Check that stream contain enough data
	//if (stream->size() < (signed)(numSubtitles * sizeof(SubtitleData))) {
		//debugC(2, kLastExpressDebugSubtitle, "Subtitle file does not contain valid data");
		//return false;
	//}

	// Read the list of subtitles
	_maxTime = 0;
	for (uint i = 0; i < numSubtitles; i++) {
		Subtitle *subtitle = new Subtitle();
		if (!subtitle->load(stream)) {
			// Failed to read this line
			reset();

			delete subtitle;

			return false;
		}

		// Update the max time
		if (subtitle->getTimeStop() > _maxTime)
			_maxTime = subtitle->getTimeStop();

		_subtitles.push_back(subtitle);
	}

	delete stream;

	return true;
}

uint16 SubtitleManager::getMaxTime() const {
	return _maxTime;
}

void SubtitleManager::setTime(uint16 time) {
	_currentIndex = -1;

	// Find the appropriate line to show
	for (int16 i = 0; i < (int16)_subtitles.size(); i++) {
		if ((time >= _subtitles[i]->getTimeStart()) && (time <= _subtitles[i]->getTimeStop())) {
			// Keep the index of the line to show
			_currentIndex = i;
			return;
		}
	}
}

bool SubtitleManager::hasChanged() const {
	// TODO: mark the old line rect as dirty
	if (_currentIndex != _lastIndex)
		return true;
	else
		return false;
}

Common::Rect SubtitleManager::draw(Graphics::Surface *surface) {
	// Update the last drawn index
	_lastIndex = _currentIndex;

	// Return if we don't have to draw any line
	if (_currentIndex == -1)
		return Common::Rect();

	// Draw the current line
	assert(_currentIndex >= 0 && _currentIndex < (int16)_subtitles.size());
	return _subtitles[_currentIndex]->draw(surface, _font);
}

} // End of namespace LastExpress