aboutsummaryrefslogtreecommitdiff
path: root/engines/bladerunner/font.cpp
blob: 68e04085858c313fdb54ad8c954249e09ffc8ba8 (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
/* 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 "bladerunner/font.h"

#include "bladerunner/bladerunner.h"

#include "common/debug.h"

namespace BladeRunner {

Font::Font() {
	reset();
}

Font::~Font() {
	close();
}

Font* Font::load(BladeRunnerEngine *vm, const Common::String &fileName, int spacing, bool useFontColor) {
	Font *font = new Font();
	font->_spacing = spacing;
	font->_useFontColor = useFontColor;

	Common::ScopedPtr<Common::SeekableReadStream> stream(vm->getResourceStream(fileName));
	if (!stream) {
		warning("Font::open failed to open '%s'", fileName.c_str());
		delete font;
		return nullptr;
	}

	font->_characterCount = stream->readUint32LE();
	font->_maxWidth = stream->readUint32LE();
	font->_maxHeight = stream->readUint32LE();
	font->_dataSize = stream->readUint32LE();
	font->_data = new uint16[font->_dataSize];
	if (!font->_data) {
		warning("Font::open failed to allocate font buffer");
		delete font;
		return nullptr;
	}

	font->_characters.resize(font->_characterCount);
	for (uint32 i = 0; i < font->_characterCount; i++) {
		font->_characters[i].x = stream->readUint32LE();
		font->_characters[i].y = stream->readUint32LE();
		font->_characters[i].width = stream->readUint32LE();
		font->_characters[i].height = stream->readUint32LE();
		font->_characters[i].dataOffset = stream->readUint32LE();
	}

	for (int i = 0; i < font->_dataSize; i++) {
		font->_data[i] = stream->readUint16LE();
	}

	return font;
}

void Font::close() {
	if (_data != nullptr) {
		delete[] _data;
	}
	reset();
}

void Font::reset() {
	_maxWidth = 0;
	_maxHeight = 0;
	_characterCount = 0;
	_data = nullptr;
	_dataSize = 0;
	_screenWidth = 0;
	_screenHeight = 0;
	_spacing = 0;
	_useFontColor = false;
	_intersperse = 0;

	_characters.clear();
}

int Font::getFontHeight() const {
	return _maxHeight;
}

int Font::getMaxCharWidth() const {
	return _maxWidth;
}

int Font::getCharWidth(uint32 chr) const {
	if (chr >= _characterCount) {
		return 0;
	}
	return _characters[chr + 1].width + _spacing;
}

void Font::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
	uint32 characterIndex = chr + 1;
	if (x < 0 || x >= dst->w || y < 0 || y >= dst->h || !_data || characterIndex >= _characterCount) {
		return;
	}

	uint16 *dstPtr = (uint16 *)dst->getBasePtr(CLIP(x + _characters[characterIndex].x, 0, dst->w - 1), CLIP(y + _characters[characterIndex].y, 0, dst->h - 1));
	uint16 *srcPtr = &_data[_characters[characterIndex].dataOffset];
	int width = _characters[characterIndex].width;
	int height = _characters[characterIndex].height;
	if (_intersperse && y & 1) {
		dstPtr += dst->pitch / 2;
	}

	int endY = height + y - 1;
	int currentY = y;

	// FIXME/TODO
	// This width and height check were added as a temporary bug fix -- a sanity check which is only needed for the internal TAHOMA18.FON font.
	// That font's glyph properties table is corrupted - the start of the file states that there are 0xF7 (=247) entries in the char properties table
	// but that table get corrupted past the 176th entry. The image data glyph part of the FON file also only covers the 176 entries.
	// So the following if clause-check will return here if the width and height values are unnaturally big.
	// The bug only affects debug cases where all character glyph need to be displayed...
	// ...or potential custom dialogue / translations that reference characters that are not within the range of ASCII values for the normal Latin characters.
	if (width > 100 || height > 100) {
		return;
	}

	while (currentY <= endY && currentY < dst->h) {
		int currentX = x;
		int endX = width + x - 1;
		while (currentX <= endX && currentX < dst->w) {
			uint8 a, r, g, b;
			gameDataPixelFormat().colorToARGB(*srcPtr, a, r, g, b);
			if (!a) { // Alpha is inversed
				if (_useFontColor) {
					// Ignore the alpha in the output as it is inversed in the input
					*dstPtr = dst->format.RGBToColor(r, g, b);
				} else {
					*dstPtr = (uint16)color;
				}
			}
			dstPtr++;
			srcPtr++;
			currentX++;
		}
		dstPtr += dst->pitch / 2 - width;
		if (_intersperse) {
			srcPtr += width;
			dstPtr += dst->pitch / 2;
			currentY++;
		}
		currentY++;
	}
}

} // End of namespace BladeRunner