aboutsummaryrefslogtreecommitdiff
path: root/engines/sci/graphics/text32.cpp
blob: cd24ca5a99e33ed56e12c7f7d83459f6ed0ef92a (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
/* 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.
 *
 */

#include "common/util.h"
#include "common/stack.h"
#include "graphics/primitives.h"

#include "sci/sci.h"
#include "sci/engine/kernel.h"
#include "sci/engine/selector.h"
#include "sci/engine/state.h"
#include "sci/graphics/cache.h"
#include "sci/graphics/compare.h"
#include "sci/graphics/font.h"
#include "sci/graphics/screen.h"
#include "sci/graphics/text32.h"

namespace Sci {

#define BITMAP_HEADER_SIZE 46

#define SCI_TEXT32_ALIGNMENT_RIGHT -1
#define SCI_TEXT32_ALIGNMENT_CENTER 1
#define SCI_TEXT32_ALIGNMENT_LEFT	0

GfxText32::GfxText32(SegManager *segMan, GfxCache *fonts, GfxScreen *screen)
	: _segMan(segMan), _cache(fonts), _screen(screen) {
}

GfxText32::~GfxText32() {
}

reg_t GfxText32::createTextBitmap(reg_t textObject, uint16 maxWidth, uint16 maxHeight, reg_t prevHunk) {
	reg_t stringObject = readSelector(_segMan, textObject, SELECTOR(text));

	// The object in the text selector of the item can be either a raw string
	// or a Str object. In the latter case, we need to access the object's data
	// selector to get the raw string.
	if (_segMan->isHeapObject(stringObject))
		stringObject = readSelector(_segMan, stringObject, SELECTOR(data));

	Common::String text = _segMan->getString(stringObject);
	// HACK: The character offsets of the up and down arrow buttons are off by one
	// in GK1, for some unknown reason. Fix them here.
	if (text.size() == 1 && (text[0] == 29 || text[0] == 30)) {
		text.setChar(text[0] + 1, 0);
	}
	GuiResourceId fontId = readSelectorValue(_segMan, textObject, SELECTOR(font));
	GfxFont *font = _cache->getFont(fontId);
	bool dimmed = readSelectorValue(_segMan, textObject, SELECTOR(dimmed));
	int16 alignment = readSelectorValue(_segMan, textObject, SELECTOR(mode));
	uint16 foreColor = readSelectorValue(_segMan, textObject, SELECTOR(fore));
	uint16 backColor = readSelectorValue(_segMan, textObject, SELECTOR(back));

	Common::Rect nsRect = g_sci->_gfxCompare->getNSRect(textObject);
	uint16 width = nsRect.width() + 1;
	uint16 height = nsRect.height() + 1;

	// Limit rectangle dimensions, if requested
	if (maxWidth > 0)
		width = maxWidth;
	if (maxHeight > 0)
		height = maxHeight;

	// Upscale the coordinates/width if the fonts are already upscaled
	if (_screen->fontIsUpscaled()) {
		width = width * _screen->getDisplayWidth() / _screen->getWidth();
		height = height * _screen->getDisplayHeight() / _screen->getHeight();
	}

	int entrySize = width * height + BITMAP_HEADER_SIZE;
	reg_t memoryId = NULL_REG;
	if (prevHunk.isNull()) {
		memoryId = _segMan->allocateHunkEntry("TextBitmap()", entrySize);
		writeSelector(_segMan, textObject, SELECTOR(bitmap), memoryId);
	} else {
		memoryId = prevHunk;
	}
	byte *memoryPtr = _segMan->getHunkPointer(memoryId);

	if (prevHunk.isNull())
		memset(memoryPtr, 0, BITMAP_HEADER_SIZE);

	byte *bitmap = memoryPtr + BITMAP_HEADER_SIZE;
	memset(bitmap, backColor, width * height);

	// Save totalWidth, totalHeight
	WRITE_LE_UINT16(memoryPtr, width);
	WRITE_LE_UINT16(memoryPtr + 2, height);

	int16 charCount = 0;
	uint16 curX = 0, curY = 0;
	const char *txt = text.c_str();
	int16 textWidth, textHeight, totalHeight = 0, offsetX = 0, offsetY = 0;
	uint16 start = 0;

	// Calculate total text height
	while (*txt) {
		charCount = GetLongest(txt, width, font);
		if (charCount == 0)
			break;

		Width(txt, 0, (int16)strlen(txt), fontId, textWidth, textHeight, true);

		totalHeight += textHeight;
		txt += charCount;
		while (*txt == ' ')
			txt++; // skip over breaking spaces
	}

	txt = text.c_str();

	// Draw text in buffer
	while (*txt) {
		charCount = GetLongest(txt, width, font);
		if (charCount == 0)
			break;
		Width(txt, start, charCount, fontId, textWidth, textHeight, true);

		switch (alignment) {
		case SCI_TEXT32_ALIGNMENT_RIGHT:
			offsetX = width - textWidth;
			break;
		case SCI_TEXT32_ALIGNMENT_CENTER:
			// Center text both horizontally and vertically
			offsetX = (width - textWidth) / 2;
			offsetY = (height - totalHeight) / 2;
			break;
		case SCI_TEXT32_ALIGNMENT_LEFT:
			offsetX = 0;
			break;

		default:
			warning("Invalid alignment %d used in TextBox()", alignment);
		}

		for (int i = 0; i < charCount; i++) {
			unsigned char curChar = txt[i];
			font->drawToBuffer(curChar, curY + offsetY, curX + offsetX, foreColor, dimmed, bitmap, width, height);
			curX += font->getCharWidth(curChar);
		}

		curX = 0;
		curY += font->getHeight();
		txt += charCount;
		while (*txt == ' ')
			txt++; // skip over breaking spaces
	}

	return memoryId;
}

void GfxText32::disposeTextBitmap(reg_t hunkId) {
	_segMan->freeHunkEntry(hunkId);
}

void GfxText32::drawTextBitmap(int16 x, int16 y, Common::Rect planeRect, reg_t textObject) {
	reg_t hunkId = readSelector(_segMan, textObject, SELECTOR(bitmap));
	uint16 backColor = readSelectorValue(_segMan, textObject, SELECTOR(back));
	// Sanity check: Check if the hunk is set. If not, either the game scripts
	// didn't set it, or an old saved game has been loaded, where it wasn't set.
	if (hunkId.isNull())
		return;

	// Negative coordinates indicate that text shouldn't be displayed
	if (x < 0 || y < 0)
		return;

	byte *memoryPtr = _segMan->getHunkPointer(hunkId);

	if (!memoryPtr) {
		// Happens when restoring in some SCI32 games
		warning("Attempt to draw an invalid text bitmap");
		return;
	}

	byte *surface = memoryPtr + BITMAP_HEADER_SIZE;

	int curByte = 0;
	uint16 skipColor = readSelectorValue(_segMan, textObject, SELECTOR(skip));
	uint16 textX = planeRect.left + x;
	uint16 textY = planeRect.top + y;
	// Get totalWidth, totalHeight
	uint16 width = READ_LE_UINT16(memoryPtr);
	uint16 height = READ_LE_UINT16(memoryPtr + 2);

	// Upscale the coordinates/width if the fonts are already upscaled
	if (_screen->fontIsUpscaled()) {
		textX = textX * _screen->getDisplayWidth() / _screen->getWidth();
		textY = textY * _screen->getDisplayHeight() / _screen->getHeight();
	}

	for (int curY = 0; curY < height; curY++) {
		for (int curX = 0; curX < width; curX++) {
			byte pixel = surface[curByte++];
			if (pixel != skipColor && pixel != backColor)
				_screen->putFontPixel(textY, curX + textX, curY, pixel);
		}
	}
}

int16 GfxText32::GetLongest(const char *text, int16 maxWidth, GfxFont *font) {
	uint16 curChar = 0;
	int16 maxChars = 0, curCharCount = 0;
	uint16 width = 0;

	while (width <= maxWidth) {
		curChar = (*(const byte *)text++);

		switch (curChar) {
		// We need to add 0xD, 0xA and 0xD 0xA to curCharCount and then exit
		//  which means, we split text like
		//  'Mature, experienced software analyst available.' 0xD 0xA
		//  'Bug installation a proven speciality. "No version too clean."' (normal game text, this is from lsl2)
		//   and 0xA '-------' 0xA (which is the official sierra subtitle separator)
		//  Sierra did it the same way.
		case 0xD:
			// Check, if 0xA is following, if so include it as well
			if ((*(const unsigned char *)text) == 0xA)
				curCharCount++;
			// it's meant to pass through here
		case 0xA:
			curCharCount++;
			// and it's also meant to pass through here
		case 0:
			return curCharCount;
		case ' ':
			maxChars = curCharCount; // return count up to (but not including) breaking space
			break;
		}
		if (width + font->getCharWidth(curChar) > maxWidth)
			break;
		width += font->getCharWidth(curChar);
		curCharCount++;
	}

	return maxChars;
}

void GfxText32::kernelTextSize(const char *text, int16 font, int16 maxWidth, int16 *textWidth, int16 *textHeight) {
	Common::Rect rect(0, 0, 0, 0);
	Size(rect, text, font, maxWidth);
	*textWidth = rect.width();
	*textHeight = rect.height();
}

void GfxText32::StringWidth(const char *str, GuiResourceId fontId, int16 &textWidth, int16 &textHeight) {
	Width(str, 0, (int16)strlen(str), fontId, textWidth, textHeight, true);
}

void GfxText32::Width(const char *text, int16 from, int16 len, GuiResourceId fontId, int16 &textWidth, int16 &textHeight, bool restoreFont) {
	uint16 curChar;
	textWidth = 0; textHeight = 0;

	GfxFont *font = _cache->getFont(fontId);

	if (font) {
		text += from;
		while (len--) {
			curChar = (*(const byte *)text++);
			switch (curChar) {
			case 0x0A:
			case 0x0D:
			case 0x9781: // this one is used by SQ4/japanese as line break as well
				textHeight = MAX<int16> (textHeight, font->getHeight());
				break;
			case 0x7C:
				warning("Code processing isn't implemented in SCI32");
				break;
			default:
				textHeight = MAX<int16> (textHeight, font->getHeight());
				textWidth += font->getCharWidth(curChar);
				break;
			}
		}
	}
}

int16 GfxText32::Size(Common::Rect &rect, const char *text, GuiResourceId fontId, int16 maxWidth) {
	int16 charCount;
	int16 maxTextWidth = 0, textWidth;
	int16 totalHeight = 0, textHeight;

	// Adjust maxWidth if we're using an upscaled font
	if (_screen->fontIsUpscaled())
		maxWidth = maxWidth * _screen->getDisplayWidth() / _screen->getWidth();

	rect.top = rect.left = 0;
	GfxFont *font = _cache->getFont(fontId);

	if (maxWidth < 0) { // force output as single line
		StringWidth(text, fontId, textWidth, textHeight);
		rect.bottom = textHeight;
		rect.right = textWidth;
	} else {
		// rect.right=found widest line with RTextWidth and GetLongest
		// rect.bottom=num. lines * GetPointSize
		rect.right = (maxWidth ? maxWidth : 192);
		const char *curPos = text;
		while (*curPos) {
			charCount = GetLongest(curPos, rect.right, font);
			if (charCount == 0)
				break;
			Width(curPos, 0, charCount, fontId, textWidth, textHeight, false);
			maxTextWidth = MAX(textWidth, maxTextWidth);
			totalHeight += textHeight;
			curPos += charCount;
			while (*curPos == ' ')
				curPos++; // skip over breaking spaces
		}
		rect.bottom = totalHeight;
		rect.right = maxWidth ? maxWidth : MIN(rect.right, maxTextWidth);
	}

	// Adjust the width/height if we're using an upscaled font
	// for the scripts
	if (_screen->fontIsUpscaled()) {
		rect.right = rect.right * _screen->getWidth() / _screen->getDisplayWidth();
		rect.bottom = rect.bottom * _screen->getHeight() / _screen->getDisplayHeight();
	}

	return rect.right;
}

} // End of namespace Sci