1 files changed, 138 insertions, 0 deletions
diff --git a/engines/sludge/imgloader.cpp b/engines/sludge/imgloader.cpp
new file mode 100644
index 0000000000..48617f1ffa
--- /dev/null
+++ b/engines/sludge/imgloader.cpp
@@ -0,0 +1,138 @@
+/* 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 "common/debug.h"
+#include "common/stream.h"
+#include "image/png.h"
+#include "graphics/surface.h"
+
+#include "allfiles.h"
+#include "imgloader.h"
+#include "colours.h"
+#include "sludge.h"
+
+namespace Sludge {
+
+bool ImgLoader::loadImage(Common::SeekableReadStream *stream, Graphics::Surface *dest, bool reserve) {
+	debug("Loading image at position: %i", stream->pos());
+	int32 start_ptr = stream->pos();
+	if (!loadPNGImage(stream, dest)) {
+		stream->seek(start_ptr);
+		if (!loadReserveImage(stream, dest, reserve)) {
+			return false;
+		}
+	}
+	return true;
+}
+
+bool ImgLoader::loadImage(Common::SeekableReadStream *stream, Graphics::Surface *dest) {
+	debug("Loading image at position: %i", stream->pos());
+	int32 start_ptr = stream->pos();
+	if (!loadPNGImage(stream, dest)) {
+		stream->seek(start_ptr);
+		if (!loadOtherImage(stream, dest)) {
+			return false;
+		}
+	}
+	return true;
+}
+
+bool ImgLoader::loadPNGImage(Common::SeekableReadStream *stream, Graphics::Surface *dest) {
+	::Image::PNGDecoder png;
+	if (!png.loadStream(*stream))
+		return false;
+	const Graphics::Surface *sourceSurface = png.getSurface();
+	Graphics::Surface *pngSurface = sourceSurface->convertTo(Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0), png.getPalette());
+	dest->copyFrom(*pngSurface);
+	pngSurface->free();
+	delete pngSurface;
+	return true;
+}
+
+bool ImgLoader::loadReserveImage(Common::SeekableReadStream *stream, Graphics::Surface *dest, int reserve) {
+	debug("Loading image at position: %i", stream->pos());
+	int32_t transCol = reserve ? -1 : 63519;
+	int n;
+	uint16 width = stream->readUint16BE();
+	uint16 height = stream->readUint16BE();
+
+	dest->create(width, height, Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0));
+	for (uint16 y = 0; y < height; y++) {
+		uint16 x = 0;
+		while (x < width) {
+			unsigned short c = (unsigned short)stream->readUint16BE();
+			if (c & 32) {
+				n = stream->readByte() + 1;
+				c -= 32;
+			} else {
+				n = 1;
+			}
+			while (n--) {
+				byte *target = (byte *)dest->getBasePtr(x, y);
+				if (c == transCol || c == 2015) {
+					target[0] = (byte)0;
+					target[1] = (byte)0;
+					target[2] = (byte)0;
+					target[3] = (byte)0;
+				} else {
+					target[0] = (byte)255;
+					target[1] = (byte)blueValue(c);
+					target[2] = (byte)greenValue(c);
+					target[3] = (byte)redValue(c);
+				}
+				x++;
+			}
+		}
+	}
+	return true;
+}
+
+bool ImgLoader::loadOtherImage(Common::SeekableReadStream *stream, Graphics::Surface *dest) {
+	int n;
+	uint16 width = stream->readUint16BE();
+	uint16 height = stream->readUint16BE();
+
+	dest->create(width, height, Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0));
+	for (uint16 y = 0; y < height; y++) {
+		uint16 x = 0;
+		while (x < width) {
+			unsigned short c = (unsigned short)stream->readUint16BE();
+			if (c & 32) {
+				n = stream->readByte() + 1;
+				c -= 32;
+			} else {
+				n = 1;
+			}
+			while (n--) {
+				byte *target = (byte *)dest->getBasePtr(x, y);
+				target[0] = (byte)255;
+				target[1] = (byte)blueValue(c);
+				target[2] = (byte)greenValue(c);
+				target[3] = (byte)redValue(c);
+				x++;
+			}
+		}
+	}
+	return true;
+}
+
+} // End of namespace Sludge