BLADERUNNER: Support for AESC

1 files changed, 139 insertions, 0 deletions

diff --git a/engines/bladerunner/aesc.cpp b/engines/bladerunner/aesc.cpp
new file mode 100644
index 0000000000..d653d1df35
--- /dev/null
+++ b/engines/bladerunner/aesc.cpp
@@ -0,0 +1,139 @@
+/* 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/aesc.h"
+
+#include "common/stream.h"
+
+namespace BladeRunner {
+
+AESC::AESC(BladeRunnerEngine *vm, int size) : _vm(vm) {
+	_dataSize = size;
+	_data = new uint8[size];
+	_entries.reserve(8);
+}
+
+AESC::~AESC() {
+	delete[] _data;
+}
+
+void AESC::readVqa(Common::SeekableReadStream *stream) {
+	uint8* dataPtr = _data;
+	int dataSize   = _dataSize;
+
+	int entriesCount = stream->readUint32LE();
+
+	if (entriesCount == 0) {
+		return;
+	}
+
+	entriesCount = MIN(entriesCount, 7);
+	_entries.resize(entriesCount);
+
+	for (Common::Array<Entry>::iterator entry = _entries.begin(); entry != _entries.end(); entry++) {
+		stream->read(&entry->palette, sizeof(Color256) * 16);
+
+		entry->x      = stream->readUint16LE();
+		entry->y      = stream->readUint16LE();
+		entry->width  = stream->readUint16LE();
+		entry->height = stream->readUint16LE();
+		entry->z      = stream->readUint16LE();
+
+		int entryDataSize = stream->readUint16LE();
+
+		int pixelCount = entry->width * entry->height;
+
+		if (pixelCount > dataSize) { // to big to fit
+			entry->width = 0;
+			entry->height = 0;
+			entry->data = _data;
+			continue;
+			// there is a issue in the game code, because it's not skipping data of entry in this case
+		}
+
+		int pos = stream->pos();
+		dataSize -= pixelCount;
+		entry->data = dataPtr;
+		do {
+			uint8 count = stream->readByte();
+			if (count & 0x80) { // repeat same data
+				uint8 colors = stream->readByte();
+				for (uint8 j = 0; j < (count & 0x7F) + 1; j++) {
+					*(dataPtr++) = colors >> 4;  // upper 4 bit
+					*(dataPtr++) = colors & 0xF; // lower 4 bit
+					pixelCount -= 2;
+				}
+			} else { // copy data
+				for (uint8 j = 0; j < count + 1; j++) {
+					uint8 colors = stream->readByte();
+					*(dataPtr++) = colors >> 4;  // upper 4 bit
+					*(dataPtr++) = colors & 0xF; // lower 4 bit
+					pixelCount -= 2;
+				}
+			}
+		} while (pixelCount > 0);
+		stream->seek(pos + entryDataSize, SEEK_SET);
+	}
+}
+
+//TODO:
+//bool AESC::isAffectingArea(int x, int y, int width, int height, int z) {
+//	int xx = x >> 1;
+//	int yy = y >> 1;
+//	if (_entries.empty()) {
+//		return false;
+//	}
+//
+//	for(int i = 0; i < _entries.size(); i++) {
+//		Entry &entry = _entries[i];
+//		if (entry.z < z) {
+//			if (entry.width < (width >> 1) + xx) {
+//				if (entry.width + entry.x > xx) {
+//					if (entry.height < (height >> 1) + yy) {
+//						if(entry.height + entry.y > yy) {
+//							return true;
+//						}
+//					}
+//				}
+//			}
+//		}
+//	}
+//	return false;
+//}
+
+void AESC::getColor(Color256 *outColor, uint16 x, uint16 y, uint16 z) {
+	Color256 color = { 0, 0, 0 };
+	for (Common::Array<Entry>::iterator entry = _entries.begin(); entry != _entries.end(); entry++) {
+		uint16 x1 = (x / 2) - entry->x;
+		uint16 y1 = (y / 2) - entry->y;
+		if ( x1 < entry->width && y1 < entry->height && z > entry->z) {
+			int colorIndex = entry->data[y1 * entry->width + x1];
+			Color256 entryColor = entry->palette[colorIndex];
+			color.r += entryColor.r;
+			color.g += entryColor.g;
+			color.b += entryColor.b;
+		}
+	}
+	*outColor = color;
+}
+
+} // End of namespace BladeRunner