1 /* ScummVM - Graphic Adventure Engine
2 *
3 * ScummVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the COPYRIGHT
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 #include "bladerunner/font.h"
24
25 #include "bladerunner/bladerunner.h"
26
27 #include "common/debug.h"
28
29 namespace BladeRunner {
30
Font()31 Font::Font() {
32 reset();
33 }
34
~Font()35 Font::~Font() {
36 close();
37 }
38
load(BladeRunnerEngine * vm,const Common::String & fileName,int spacing,bool useFontColor)39 Font* Font::load(BladeRunnerEngine *vm, const Common::String &fileName, int spacing, bool useFontColor) {
40 Font *font = new Font();
41 font->_spacing = spacing;
42 font->_useFontColor = useFontColor;
43
44 Common::ScopedPtr<Common::SeekableReadStream> stream(vm->getResourceStream(fileName));
45 if (!stream) {
46 warning("Font::open failed to open '%s'", fileName.c_str());
47 delete font;
48 return nullptr;
49 }
50
51 font->_characterCount = stream->readUint32LE();
52 font->_maxWidth = stream->readUint32LE();
53 font->_maxHeight = stream->readUint32LE();
54 font->_dataSize = stream->readUint32LE();
55 font->_data = new uint16[font->_dataSize];
56 if (!font->_data) {
57 warning("Font::open failed to allocate font buffer");
58 delete font;
59 return nullptr;
60 }
61
62 font->_characters.resize(font->_characterCount);
63 for (uint32 i = 0; i < font->_characterCount; ++i) {
64 font->_characters[i].x = stream->readUint32LE();
65 font->_characters[i].y = stream->readUint32LE();
66 font->_characters[i].width = stream->readUint32LE();
67 font->_characters[i].height = stream->readUint32LE();
68 font->_characters[i].dataOffset = stream->readUint32LE();
69 }
70
71 for (int i = 0; i < font->_dataSize; ++i) {
72 font->_data[i] = stream->readUint16LE();
73 }
74
75 return font;
76 }
77
close()78 void Font::close() {
79 if (_data != nullptr) {
80 delete[] _data;
81 }
82 reset();
83 }
84
reset()85 void Font::reset() {
86 _maxWidth = 0;
87 _maxHeight = 0;
88 _characterCount = 0;
89 _data = nullptr;
90 _dataSize = 0;
91 _screenWidth = 0;
92 _screenHeight = 0;
93 _spacing = 0;
94 _useFontColor = false;
95
96 _characters.clear();
97 }
98
getFontHeight() const99 int Font::getFontHeight() const {
100 return _maxHeight;
101 }
102
getMaxCharWidth() const103 int Font::getMaxCharWidth() const {
104 return _maxWidth;
105 }
106
getCharWidth(uint32 chr) const107 int Font::getCharWidth(uint32 chr) const {
108 if (chr >= _characterCount) {
109 return 0;
110 }
111 return _characters[chr + 1].width + _spacing;
112 }
113
drawChar(Graphics::Surface * dst,uint32 chr,int x,int y,uint32 color) const114 void Font::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
115 uint32 characterIndex = chr + 1;
116 if (x < 0 || x >= dst->w || y < 0 || y >= dst->h || !_data || characterIndex >= _characterCount) {
117 return;
118 }
119
120 uint16 *srcPtr = &_data[_characters[characterIndex].dataOffset];
121 int width = _characters[characterIndex].width;
122 int height = _characters[characterIndex].height;
123
124 int endY = height + y - 1;
125 int currentY = y;
126
127 // FIXME/TODO
128 // 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.
129 // 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
130 // but that table get corrupted past the 176th entry. The image data glyph part of the FON file also only covers the 176 entries.
131 // So the following if clause-check will return here if the width and height values are unnaturally big.
132 // The bug only affects debug cases where all character glyph need to be displayed...
133 // ...or potential custom dialogue / translations that reference characters that are not within the range of ASCII values for the normal Latin characters.
134 if (width > 100 || height > 100) {
135 return;
136 }
137
138 while (currentY <= endY && currentY < dst->h) {
139 int currentX = x;
140 int endX = width + x - 1;
141 while (currentX <= endX && currentX < dst->w) {
142 uint8 a, r, g, b;
143 getGameDataColor(*srcPtr, a, r, g, b);
144 if (!a) { // Alpha is inversed
145 uint32 outColor = color;
146 if (_useFontColor) {
147 // Ignore the alpha in the output as it is inversed in the input
148 outColor = dst->format.RGBToColor(r, g, b);
149 }
150 void *dstPtr = dst->getBasePtr(CLIP(currentX + _characters[characterIndex].x, 0, dst->w - 1), CLIP(currentY + _characters[characterIndex].y, 0, dst->h - 1));
151 drawPixel(*dst, dstPtr, outColor);
152 }
153 ++srcPtr;
154 ++currentX;
155 }
156 ++currentY;
157 }
158 }
159
160 } // End of namespace BladeRunner
161