1 files changed, 317 insertions, 0 deletions
diff --git a/graphics/wincursor.cpp b/graphics/wincursor.cpp
new file mode 100644
index 0000000000..d3c9414e03
--- /dev/null
+++ b/graphics/wincursor.cpp
@@ -0,0 +1,317 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/debug.h"
+#include "common/file.h"
+#include "common/memstream.h"
+#include "common/ptr.h"
+#include "common/str.h"
+#include "common/stream.h"
+#include "common/winexe_ne.h"
+#include "common/winexe_pe.h"
+
+#include "graphics/wincursor.h"
+
+namespace Graphics {
+
+WinCursor::WinCursor() {
+	_width    = 0;
+	_height   = 0;
+	_hotspotX = 0;
+	_hotspotY = 0;
+	_surface  = 0;
+	_keyColor = 0;
+	memset(_palette, 0, 256 * 3);
+}
+
+WinCursor::~WinCursor() {
+	clear();
+}
+
+uint16 WinCursor::getWidth() const {
+	return _width;
+}
+
+uint16 WinCursor::getHeight() const {
+	return _height;
+}
+
+uint16 WinCursor::getHotspotX() const {
+	return _hotspotX;
+}
+
+uint16 WinCursor::getHotspotY() const {
+	return _hotspotY;
+}
+
+byte WinCursor::getKeyColor() const {
+	return _keyColor;
+}
+
+bool WinCursor::readFromStream(Common::SeekableReadStream &stream) {
+	clear();
+
+	_hotspotX = stream.readUint16LE();
+	_hotspotY = stream.readUint16LE();
+
+	// Check header size
+	if (stream.readUint32LE() != 40)
+		return false;
+
+	// Check dimensions
+	_width = stream.readUint32LE();
+	_height = stream.readUint32LE() / 2;
+
+	if (_width & 3) {
+		// Cursors should always be a power of 2
+		// Of course, it wouldn't be hard to handle but if we have no examples...
+		warning("Non-divisible-by-4 width cursor found");
+		return false;
+	}
+
+	// Color planes
+	if (stream.readUint16LE() != 1)
+		return false;
+
+	// Only 1bpp and 8bpp supported
+	uint16 bitsPerPixel = stream.readUint16LE();
+	if (bitsPerPixel != 1 && bitsPerPixel != 8)
+		return false;
+
+	// Compression
+	if (stream.readUint32LE() != 0)
+		return false;
+
+	// Image size + X resolution + Y resolution
+	stream.skip(12);
+
+	uint32 numColors = stream.readUint32LE();
+
+	// If the color count is 0, then it uses up the maximum amount
+	if (numColors == 0)
+		numColors = 1 << bitsPerPixel;
+
+	// Reading the palette
+	stream.seek(40 + 4);
+	for (uint32 i = 0 ; i < numColors; i++) {
+		_palette[i * 3 + 2] = stream.readByte();
+		_palette[i * 3 + 1] = stream.readByte();
+		_palette[i * 3    ] = stream.readByte();
+		stream.readByte();
+	}
+
+	// Reading the bitmap data
+	uint32 dataSize = stream.size() - stream.pos();
+	byte *initialSource = new byte[dataSize];
+	stream.read(initialSource, dataSize);
+
+	// Parse the XOR map
+	const byte *src = initialSource;
+	_surface = new byte[_width * _height];
+	byte *dest = _surface + _width * (_height - 1);
+	uint32 imagePitch = _width * bitsPerPixel / 8;
+
+	for (uint32 i = 0; i < _height; i++) {
+		byte *rowDest = dest;
+
+		if (bitsPerPixel == 1) {
+			// 1bpp
+			for (uint32 j = 0; j < (_width / 8); j++) {
+				byte p = src[j];
+
+				for (int k = 0; k < 8; k++, rowDest++, p <<= 1) {
+					if ((p & 0x80) == 0x80)
+						*rowDest = 1;
+					else
+						*rowDest = 0;
+				}
+			}
+		} else {
+			// 8bpp
+			memcpy(rowDest, src, _width);
+		}
+
+		dest -= _width;
+		src += imagePitch;
+	}
+
+	// Calculate our key color
+	if (numColors < 256) {
+		// If we're not using the maximum colors in a byte, we can fit it in
+		_keyColor = numColors;
+	} else {
+		// HACK: Try to find a color that's not being used so it can become
+		// our keycolor. It's quite impossible to fit 257 entries into 256...
+		for (uint32 i = 0; i < 256; i++) {
+			for (int j = 0; j < _width * _height; j++) {
+				// TODO: Also check to see if the space is transparent
+
+				if (_surface[j] == i)
+					break;
+
+				if (j == _width * _height - 1) {
+					_keyColor = i;
+					i = 256;
+					break;
+				}
+			}
+		}
+	}
+
+	// Now go through and apply the AND map to get the transparency
+	uint32 andWidth = (_width + 7) / 8;
+	src += andWidth * (_height - 1);
+
+	for (uint32 y = 0; y < _height; y++) {
+		for (uint32 x = 0; x < _width; x++)
+			if (src[x / 8] & (1 << (7 - x % 8)))
+				_surface[y * _width + x] = _keyColor;
+
+		src -= andWidth;
+	}
+
+	delete[] initialSource;
+	return true;
+}
+
+void WinCursor::clear() {
+	delete[] _surface; _surface = 0;
+}
+
+WinCursorGroup::WinCursorGroup() {
+}
+
+WinCursorGroup::~WinCursorGroup() {
+	for (uint32 i = 0; i < cursors.size(); i++)
+		delete cursors[i].cursor;
+}
+
+WinCursorGroup *WinCursorGroup::createCursorGroup(Common::NEResources &exe, const Common::WinResourceID &id) {
+	Common::ScopedPtr<Common::SeekableReadStream> stream(exe.getResource(Common::kNEGroupCursor, id));
+
+	if (!stream || stream->size() <= 6)
+		return 0;
+
+	stream->skip(4);
+	uint32 cursorCount = stream->readUint16LE();
+	if ((uint32)stream->size() < (6 + cursorCount * 16))
+		return 0;
+
+	WinCursorGroup *group = new WinCursorGroup();
+	group->cursors.reserve(cursorCount);
+
+	for (uint32 i = 0; i < cursorCount; i++) {
+		stream->readUint16LE(); // width
+		stream->readUint16LE(); // height
+
+		// Plane count
+		if (stream->readUint16LE() != 1) {
+			delete group;
+			return 0;
+		}
+
+		// Bits per pixel
+		// NE cursors can only be 1bpp
+		if (stream->readUint16LE() != 1) {
+			delete group;
+			return 0;
+		}
+
+		stream->readUint32LE(); // data size
+		uint32 cursorId = stream->readUint32LE();
+
+		Common::ScopedPtr<Common::SeekableReadStream> cursorStream(exe.getResource(Common::kNECursor, cursorId));
+		if (!cursorStream) {
+			delete group;
+			return 0;
+		}
+
+		WinCursor *cursor = new WinCursor();
+		if (!cursor->readFromStream(*cursorStream)) {
+			delete cursor;
+			delete group;
+			return 0;
+		}
+
+		CursorItem item;
+		item.id = cursorId;
+		item.cursor = cursor;
+		group->cursors.push_back(item);
+	}
+
+	return group;
+}
+
+WinCursorGroup *WinCursorGroup::createCursorGroup(Common::PEResources &exe, const Common::WinResourceID &id) {
+	Common::ScopedPtr<Common::SeekableReadStream> stream(exe.getResource(Common::kPEGroupCursor, id));
+
+	if (!stream || stream->size() <= 6)
+		return 0;
+
+	stream->skip(4);
+	uint32 cursorCount = stream->readUint16LE();
+	if ((uint32)stream->size() < (6 + cursorCount * 14))
+		return 0;
+
+	WinCursorGroup *group = new WinCursorGroup();
+	group->cursors.reserve(cursorCount);
+
+	for (uint32 i = 0; i < cursorCount; i++) {
+		stream->readUint16LE(); // width
+		stream->readUint16LE(); // height
+
+		// Plane count
+		if (stream->readUint16LE() != 1) {
+			delete group;
+			return 0;
+		}
+
+		stream->readUint16LE(); // bits per pixel
+		stream->readUint32LE(); // data size
+		uint32 cursorId = stream->readUint16LE();
+
+		Common::ScopedPtr<Common::SeekableReadStream> cursorStream(exe.getResource(Common::kPECursor, cursorId));
+		if (!cursorStream) {
+			delete group;
+			return 0;
+		}
+
+		WinCursor *cursor = new WinCursor();
+		if (!cursor->readFromStream(*cursorStream)) {
+			delete cursor;
+			delete group;
+			return 0;
+		}
+
+		CursorItem item;
+		item.id = cursorId;
+		item.cursor = cursor;
+		group->cursors.push_back(item);
+	}
+
+	return group;
+}
+
+} // End of namespace Graphics