Initial commit

engines/illusions/resources/fontresource.cpp

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "illusions/illusions.h"
+#include "illusions/resources/fontresource.h"
+#include "illusions/dictionary.h"
+
+namespace Illusions {
+
+// FontResourceLoader
+
+void FontResourceLoader::load(Resource *resource) {
+	FontInstance *fontInstance = new FontInstance(_vm);
+	fontInstance->load(resource);
+	resource->_instance = fontInstance;
+}
+
+bool FontResourceLoader::isFlag(int flag) {
+	return
+		flag == kRlfLoadFile;
+}
+
+// CharInfo
+
+void CharInfo::load(byte *dataStart, Common::SeekableReadStream &stream) {
+	_width = stream.readUint16LE();
+	_field_2 = stream.readUint16LE();
+	uint32 pixelsOffs = stream.readUint32LE();
+	_pixels = dataStart + pixelsOffs;
+	debug(2, "CharInfo::load() _width: %d; _field_2: %d; pixelsOffs: %08X",
+		_width, _field_2, pixelsOffs);
+}
+
+// CharRange
+
+CharRange::CharRange() : _charInfos(nullptr) {
+}
+
+CharRange::~CharRange() {
+	delete[] _charInfos;
+}
+
+void CharRange::load(byte *dataStart, Common::SeekableReadStream &stream) {
+	_firstChar = stream.readUint16LE();
+	_lastChar = stream.readUint16LE();
+	uint count = _lastChar - _firstChar + 1;
+	uint32 charInfosOffs = stream.readUint32LE();
+	_charInfos = new CharInfo[count];
+	for (uint i = 0; i < count; ++i) {
+		stream.seek(charInfosOffs + i * 8);
+		_charInfos[i].load(dataStart, stream);
+	}
+	debug(2, "CharRange::load() _firstChar: %d; _lastChar: %d; charInfosOffs: %08X",
+		_firstChar, _lastChar, charInfosOffs);
+}
+
+CharInfo *CharRange::getCharInfo(uint16 c) {
+	return &_charInfos[c - _firstChar];
+}
+
+bool CharRange::containsChar(uint16 c) {
+	return c >= _firstChar && c <= _lastChar;
+}
+
+// FontResource
+
+FontResource::FontResource() : _charRanges(nullptr) {
+}
+
+FontResource::~FontResource() {
+	delete[] _charRanges;
+}
+
+void FontResource::load(Resource *resource) {
+	byte *data = resource->_data;
+	uint32 dataSize = resource->_dataSize;
+	Common::MemoryReadStream stream(data, dataSize, DisposeAfterUse::NO);
+	_totalSize = stream.readUint32LE();
+	_charHeight = stream.readUint16LE();
+	_defaultChar = stream.readUint16LE();
+	_colorIndex = stream.readUint16LE();
+	_lineIncr = stream.readUint16LE();
+	_widthC = stream.readUint16LE();
+	_charRangesCount = stream.readUint16LE();
+	uint32 charRangesOffs = stream.pos();
+	_charRanges = new CharRange[_charRangesCount];
+	for (uint i = 0; i < _charRangesCount; ++i) {
+		stream.seek(charRangesOffs + i * 8);
+		_charRanges[i].load(data, stream);
+	}
+	debug(2, "FontResource::load() _charHeight: %d; _defaultChar: %d; _colorIndex: %d; _lineIncr: %d; _widthC: %d; _charRangesCount: %d",
+		_charHeight, _defaultChar, _colorIndex, _lineIncr, _widthC, _charRangesCount);
+}
+
+CharInfo *FontResource::getCharInfo(uint16 c) {
+	for (uint i = 0; i < _charRangesCount; ++i) {
+		if (_charRanges[i].containsChar(c))
+			return _charRanges[i].getCharInfo(c);
+	}
+	return nullptr;
+}
+
+const Common::Rect FontResource::calculateRectForText(uint16 *text, uint textLength) {
+	int16 width = 0;
+	for (uint i = 0; i < textLength && *text; i++) {
+		width += getCharInfo(*text)->_width;
+		text++;
+	}
+	return Common::Rect(width, getCharHeight() + getLineIncr());
+}
+
+// FontInstance
+
+FontInstance::FontInstance(IllusionsEngine *vm) : _vm(vm) {
+}
+
+void FontInstance::load(Resource *resource) {
+	_fontResource = new FontResource();
+	_fontResource->load(resource);
+	_resId = resource->_resId;
+	_vm->_dict->addFont(resource->_resId, _fontResource);
+}
+
+void FontInstance::unload() {
+	delete _fontResource;
+	_vm->_dict->removeFont(_resId);
+}
+
+} // End of namespace Illusions