aboutsummaryrefslogtreecommitdiff
path: root/scumm/nut_renderer.cpp
blob: 8d6fcd56c2c5e8a106b4ea169ae762353fe66e60 (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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2005 The ScummVM project
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header$
 */

#include "stdafx.h"
#include "scumm/scumm.h"
#include "scumm/nut_renderer.h"
#include "scumm/bomp.h"


namespace Scumm {

NutRenderer::NutRenderer(ScummEngine *vm) :
	_vm(vm),
	_initialized(false),
	_loaded(false),
	_numChars(0) {

	for (int i = 0; i < 256; i++)
		_chars[i].src = NULL;
}

NutRenderer::~NutRenderer() {
	for (int i = 0; i < _numChars; i++) {
		if (_chars[i].src)
			delete []_chars[i].src;
	}
}

int32 NutRenderer::decodeCodec44(byte *dst, const byte *src, uint32 length) {
	byte val;
	uint16 size_line, num;
	int16 decoded_length = 0;

	do {
		size_line = READ_LE_UINT16(src);
		src += 2;
		length -= 2;

		while (size_line != 0) {
			num = *src++;
			val = *src++;
			memset(dst, val, num);
			dst += num;
			decoded_length += num;
			length -= 2;
			size_line -= 2;
			if (size_line != 0) {
				num = READ_LE_UINT16(src) + 1;
				src += 2;
				memcpy(dst, src, num);
				dst += num;
				decoded_length += num;
				src += num;
				length -= num + 2;
				size_line -= num + 2;
			}
		}
		dst--;
		decoded_length--;

	} while (length > 1);
	return decoded_length;
}

static int32 codec1(byte *dst, byte *src, int height) {
	byte val, code;
	int32 length, decoded_length = 0;
	int h = height, size_line;

	for (h = 0; h < height; h++) {
		size_line = READ_LE_UINT16(src);
		src += 2;
		while (size_line > 0) {
			code = *src++;
			size_line--;
			length = (code >> 1) + 1;
			if (code & 1) {
				val = *src++;
				size_line--;
				if (val)
					memset(dst, val, length);
				dst += length;
				decoded_length += length;
			} else {
				size_line -= length;
				while (length--) {
					val = *src++;
					if (val)
						*dst = val;
					dst++;
					decoded_length++;
				}
			}
		}
	}
	return decoded_length;
}

bool NutRenderer::loadFont(const char *filename) {
	debug(8, "NutRenderer::loadFont(\"%s\") called", filename);
	if (_loaded) {
		warning("NutRenderer::loadFont() Font already loaded, ok, loading...");
	}

	ScummFile file;
	_vm->openFile(file, filename);
	if (file.isOpen() == false) {
		warning("NutRenderer::loadFont() Can't open font file: %s", filename);
		return false;
	}

	uint32 tag = file.readUint32BE();
	if (tag != 'ANIM') {
		warning("NutRenderer::loadFont() there is no ANIM chunk in font header");
		return false;
	}

	uint32 length = file.readUint32BE();
	byte *dataSrc = (byte *)malloc(length);
	file.read(dataSrc, length);
	file.close();

	if (READ_BE_UINT32(dataSrc) != 'AHDR') {
		warning("NutRenderer::loadFont() there is no AHDR chunk in font header");
		free(dataSrc);
		return false;
	}

	_numChars = READ_LE_UINT16(dataSrc + 10);
	uint32 offset = 0;
	int32 decoded_length;

	for (int l = 0; l < _numChars; l++) {
		offset += READ_BE_UINT32(dataSrc + offset + 4) + 8;
		if (READ_BE_UINT32(dataSrc + offset) == 'FRME') {
			offset += 8;

			if (READ_BE_UINT32(dataSrc + offset) == 'FOBJ') {
				int codec = READ_LE_UINT16(dataSrc + offset + 8);
				_chars[l].xoffs = READ_LE_UINT16(dataSrc + offset + 10);
				_chars[l].yoffs = READ_LE_UINT16(dataSrc + offset + 12);
				_chars[l].width = READ_LE_UINT16(dataSrc + offset + 14);
				_chars[l].height = READ_LE_UINT16(dataSrc + offset + 16);
				_chars[l].src = new byte[(_chars[l].width + 2) * _chars[l].height + 1000];

				// If characters have transparency, then bytes just get skipped and
				// so there may appear some garbage. That's why we have to fill it
				// with zeroes first.
				memset(_chars[l].src, 0, (_chars[l].width + 2) * _chars[l].height + 1000);
				if ((codec == 44) || (codec == 21)) 
					decoded_length = decodeCodec44(_chars[l].src, dataSrc + offset + 22, READ_BE_UINT32(dataSrc + offset + 4) - 14);
				else if (codec == 1) {
					decoded_length = codec1(_chars[l].src, dataSrc + offset + 22, _chars[l].height);
				} else
					error("NutRenderer::loadFont: unknown codec: %d", codec);

				// FIXME: This is used to work around wrong font file format in Russian 
				// version of FT. Font files there contain wrong information about
				// glyphs width. See patch #823031.
				if (_vm->_language == Common::RU_RUS) {
					// try to rely on length of returned data
				  	if (l > 127)
						_chars[l].width = decoded_length / _chars[l].height;
					// but even this not always works
					if (l == 134 && !strcmp(filename, "titlfnt.nut"))
						_chars[l].width--;
				}
			} else {
				warning("NutRenderer::loadFont(%s) there is no FOBJ chunk in FRME chunk %d (offset %x)", filename, l, offset);
				break;
			}
		} else {
			warning("NutRenderer::loadFont(%s) there is no FRME chunk %d (offset %x)", filename, l, offset);
			break;
		}
	}

	free(dataSrc);
	_loaded = true;
	return true;
}

int NutRenderer::getCharWidth(byte c) const {
	debug(8, "NutRenderer::getCharWidth() called");
	if (!_loaded) {
		warning("NutRenderer::getCharWidth() Font is not loaded");
		return 0;
	}

	if (c >= 0x80 && _vm->_useCJKMode)
		return _vm->_2byteWidth / 2;

	if (c >= _numChars)
		error("invalid character in NutRenderer::getCharWidth : %d (%d)", c, _numChars);

	return _chars[c].width;
}

int NutRenderer::getCharHeight(byte c) const {
	debug(8, "NutRenderer::getCharHeight() called");
	if (!_loaded) {
		warning("NutRenderer::getCharHeight() Font is not loaded");
		return 0;
	}

	if (c >= 0x80 && _vm->_useCJKMode)
		return _vm->_2byteHeight;

	if (c >= _numChars)
		error("invalid character in NutRenderer::getCharHeight : %d (%d)", c, _numChars);

	return _chars[c].height;
}

int NutRenderer::getCharOffsX(byte c) const {
	debug(8, "NutRenderer::getCharOffsX() called");
	if (!_loaded) {
		warning("NutRenderer::getCharOffsX() Font is not loaded");
		return 0;
	}

	if (c >= 0x80 && _vm->_useCJKMode) {
		return 0;
	}

	if (c >= _numChars)
		error("invalid character in NutRenderer::getCharOffsX : %d (%d)", c, _numChars);

	return _chars[c].xoffs;
}

int NutRenderer::getCharOffsY(byte c) const {
	debug(8, "NutRenderer::getCharOffsY() called");
	if (!_loaded) {
		warning("NutRenderer::getCharOffsY() Font is not loaded");
		return 0;
	}

	if (c >= 0x80 && _vm->_useCJKMode) {
		return 0;
	}

	if (c >= _numChars)
		error("invalid character in NutRenderer::getCharOffsY : %d (%d)", c, _numChars);

	return _chars[c].yoffs;
}

void NutRenderer::drawShadowChar(const Graphics::Surface &s, int c, int x, int y, byte color, bool showShadow) {
	debug(8, "NutRenderer::drawShadowChar('%c', %d, %d, %d, %d) called", c, x, y, (int)color, showShadow);
	if (!_loaded) {
		warning("NutRenderer::drawShadowChar() Font is not loaded");
		return;
	}

	// HACK: we draw the character a total of 7 times: 6 times shifted
	// and in black for the shadow, and once in the right color and position.
	// This way we achieve the exact look as the original CMI had. However,
	// the question remains whether they did it this way, too, or if there is
	// some "font shadow" resource we don't know yet.

	int offsetX[7] = { -1,  0, 1, 0, 1, 2, 0 };
	int offsetY[7] = {  0, -1, 0, 1, 2, 1, 0 };
	int cTable[7] =  {  0,  0, 0, 0, 0, 0, color };
	int i = 0;
	
	if (!showShadow)
		i = 6;

	for (; i < 7; i++) {
		x += offsetX[i];
		y += offsetY[i];
		color = cTable[i];
		
		if (c >= 256 && _vm->_useCJKMode)
			draw2byte(s, c, x, y, color);
		else
			drawChar(s, (byte)c, x, y, color);
		
		x -= offsetX[i];
		y -= offsetY[i];
	}
}

void NutRenderer::drawFrame(byte *dst, int c, int x, int y) {
	const int width = MIN(_chars[c].width, _vm->_screenWidth - x);
	const int height = MIN(_chars[c].height, _vm->_screenHeight - y);
	const byte *src = _chars[c].src;
	const int srcPitch = _chars[c].width;
	byte bits = 0;

	const int minX = x < 0 ? -x : 0;
	const int minY = y < 0 ? -y : 0;

	if (height <= 0 || width <= 0) {
		return;
	}

	dst += _vm->_screenWidth * y + x;
	if (minY) {
		src += minY * srcPitch;
		dst += minY * _vm->_screenWidth;
	}

	for (int ty = minY; ty < height; ty++) {
		for (int tx = minX; tx < width; tx++) {
			bits = src[tx];
			if (bits != 231 && bits) {
				dst[tx] = bits;
			}
		}
		src += srcPitch;
		dst += _vm->_screenWidth;
	}
}

void NutRenderer::drawChar(const Graphics::Surface &s, byte c, int x, int y, byte color) {
	byte *dst = (byte *)s.pixels + y * s.pitch + x;
	const int width = MIN(_chars[c].width, s.w - x);
	const int height = MIN(_chars[c].height, s.h - y);
	const byte *src = _chars[c].src;
	const int srcPitch = _chars[c].width;

	const int minX = x < 0 ? -x : 0;
	const int minY = y < 0 ? -y : 0;

	if (height <= 0 || width <= 0) {
		return;
	}

	if (minY) {
		src += minY * srcPitch;
		dst += minY * s.pitch;
	}

	for (int ty = minY; ty < height; ty++) {
		for (int tx = minX; tx < width; tx++) {
			if (src[tx] != 0) {
				dst[tx] = color;
			}
		}
		src += srcPitch;
		dst += s.pitch;
	}
}

void NutRenderer::draw2byte(const Graphics::Surface &s, int c, int x, int y, byte color) {
	if (!_loaded) {
		debug(2, "NutRenderer::draw2byte() Font is not loaded");
		return;
	}

	byte *dst = (byte *)s.pixels + y * s.pitch + x;
	const int width = _vm->_2byteWidth;
	const int height = MIN(_vm->_2byteHeight, s.h - y);
	byte *src = _vm->get2byteCharPtr(c);
	byte bits = 0;

	if (height <= 0 || width <= 0) {
		return;
	}

	for (int ty = 0; ty < height; ty++) {
		for (int tx = 0; tx < width; tx++) {
			if ((tx & 7) == 0)
				bits = *src++;
			if (x + tx < 0 || x + tx >= s.w || y + ty < 0)
				continue;
			if (bits & revBitMask[tx & 7]) {
				dst[tx] = color;
			}
		}
		dst += s.pitch;
	}
}

} // End of namespace Scumm