Initial commit

engines/twine/parser/sprite.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 "twine/parser/sprite.h"
+#include "common/stream.h"
+#include "twine/shared.h"
+
+namespace TwinE {
+
+bool SpriteBoundingBoxData::loadFromStream(Common::SeekableReadStream &stream, bool lba1) {
+	const int32 size = stream.size();
+	const int32 amount = size / 16;
+	for (int32 i = 0; i < amount; ++i) {
+		SpriteDim spriteDim;
+		spriteDim.x = stream.readSint16LE();
+		spriteDim.y = stream.readSint16LE();
+		BoundingBox boundingBox;
+		boundingBox.mins.x = stream.readSint16LE();
+		boundingBox.maxs.x = stream.readSint16LE();
+		boundingBox.mins.y = stream.readSint16LE();
+		boundingBox.maxs.y = stream.readSint16LE();
+		boundingBox.mins.z = stream.readSint16LE();
+		boundingBox.maxs.z = stream.readSint16LE();
+		_boundingBoxes.push_back(boundingBox);
+		_dimensions.push_back(spriteDim);
+	}
+	return !stream.err();
+}
+
+void SpriteData::reset() {
+	for (int i = 0; i < _sprites; ++i) {
+		_surfaces[i].free();
+	}
+	_sprites = 0;
+}
+
+bool SpriteData::loadFromStream(Common::SeekableReadStream &stream, bool lba1) {
+	reset();
+	if (_bricks) {
+		// brick sprites don't have the offsets
+		return loadSprite(stream, 0);
+	}
+	const uint32 offset1 = stream.readUint32LE();
+	const uint32 offset2 = stream.readUint32LE();
+	const uint32 offsetData = stream.pos();
+	if (!loadSprite(stream, offset1)) {
+		return false;
+	}
+	// for most sprites the second offset is just the end of the stream - but
+	// some sprites (like shadow in lba1) have a second sprite following the
+	// first one.
+	if (offset2 + offsetData >= stream.size()) {
+		return true;
+	}
+	return loadSprite(stream, offset2);
+}
+
+bool SpriteData::loadSprite(Common::SeekableReadStream &stream, uint32 offset) {
+	stream.seek(offset);
+	int width = stream.readByte();
+	int height = stream.readByte();
+	_offsetX[_sprites] = stream.readByte();
+	_offsetY[_sprites] = stream.readByte();
+	const Graphics::PixelFormat format = Graphics::PixelFormat::createFormatCLUT8();
+	_surfaces[_sprites].create(width, height, format);
+	const uint8 *last = (const uint8 *)_surfaces[_sprites].getBasePtr(width, height - 1);
+	for (int y = 0; y < height; ++y) {
+		const uint8 numRuns = stream.readByte();
+		int x = 0;
+		for (uint8 run = 0; run < numRuns; ++run) {
+			const uint8 runSpec = stream.readByte();
+			const uint8 runLength = bits(runSpec, 0, 6) + 1;
+			const uint8 type = bits(runSpec, 6, 2);
+			if (type == 1) {
+				uint8 *start = (uint8 *)_surfaces[_sprites].getBasePtr(x, y);
+				for (uint8 i = 0; i < runLength; ++i) {
+					if (start > last) {
+						return false;
+					}
+					*start++ = stream.readByte();
+				}
+			} else if (type != 0) {
+				uint8 *start = (uint8 *)_surfaces[_sprites].getBasePtr(x, y);
+				uint8 *end = (uint8 *)_surfaces[_sprites].getBasePtr(x + runLength, y);
+				if (end > last) {
+					return false;
+				}
+				Common::fill(start, end, stream.readByte());
+			}
+			x += runLength;
+		}
+	}
+	if (stream.err()) {
+		return false;
+	}
+	++_sprites;
+	return true;
+}
+
+} // namespace TwinE