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engines/prince/font.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 "common/archive.h"
+#include "common/debug.h"
+#include "common/stream.h"
+
+#include "prince/font.h"
+#include "prince/prince.h"
+
+namespace Prince {
+
+Font::Font() : _fontData(nullptr) {
+}
+
+Font::~Font() {
+	if (_fontData != nullptr) {
+		free(_fontData);
+		_fontData = nullptr;
+	}
+}
+
+bool Font::loadStream(Common::SeekableReadStream &stream) {
+	stream.seek(0);
+	uint32 dataSize = stream.size();
+	_fontData = (byte *)malloc(dataSize);
+	stream.read(_fontData, stream.size());
+	return true;
+}
+
+int Font::getFontHeight() const {
+	return _fontData[5];
+}
+
+int Font::getMaxCharWidth() const {
+	return 0;
+}
+
+Font::ChrData Font::getChrData(byte chr) const {
+	chr -= 32;
+	uint16 chrOffset = 4 * chr + 6;
+
+	ChrData chrData;
+	chrData._width = _fontData[chrOffset + 2];
+	chrData._height = _fontData[chrOffset + 3];
+	chrData._pixels = _fontData + READ_LE_UINT16(_fontData + chrOffset);
+
+	return chrData;
+}
+
+int Font::getCharWidth(uint32 chr) const {
+	return getChrData(chr)._width;
+}
+
+void Font::drawChar(Graphics::Surface *dst, uint32 chr, int posX, int posY, uint32 color) const {
+	const ChrData chrData = getChrData(chr);
+	Common::Rect screenRect(0, 0, PrinceEngine::kNormalWidth, PrinceEngine::kNormalHeight);
+
+	for (int y = 0; y < chrData._height; y++) {
+		for (int x = 0; x < chrData._width; x++) {
+			byte d = chrData._pixels[x + (chrData._width * y)];
+			if (d == 0) d = 255;
+			else if (d == 1) d = 0;
+			else if (d == 2) d = color;
+			else if (d == 3) d = 0;
+			if (d != 255) {
+				if (screenRect.contains(posX + x, posY + y)) {
+					*(byte *)dst->getBasePtr(posX + x, posY + y) = d;
+				}
+			}
+		}
+	}
+}
+
+} // End of namespace Prince