Initial commit

engines/bladerunner/image.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 "bladerunner/image.h"
+
+#include "bladerunner/bladerunner.h"
+#include "bladerunner/decompress_lcw.h"
+
+#include "common/rect.h"
+
+namespace BladeRunner {
+
+Image::Image(BladeRunnerEngine *vm) {
+	_vm = vm;
+}
+
+Image::~Image() {
+	_surface.free();
+}
+
+bool Image::open(const Common::String &name) {
+	Common::SeekableReadStream *stream = _vm->getResourceStream(name);
+	if (!stream) {
+		warning("Image::open failed to open '%s'\n", name.c_str());
+		return false;
+	}
+
+	char tag[4] = { 0 };
+	stream->read(tag, 3);
+	uint32 width  = stream->readUint32LE();
+	uint32 height = stream->readUint32LE();
+
+	// Enforce a reasonable limit
+	assert(width < 8000 && height < 8000);
+
+	uint32 bufSize = stream->size();
+	uint8 *buf = new uint8[bufSize];
+	stream->read(buf, bufSize);
+
+	uint32 dataSize = 2 * width * height;
+	void *data = malloc(dataSize);
+	assert(data);
+
+	if (strcmp(tag, "LZO") == 0) {
+		warning("LZO image decompression is not implemented");
+	} else if (strcmp(tag, "LCW") == 0) {
+		decompress_lcw(buf, bufSize, (uint8 *)data, dataSize);
+#ifdef SCUMM_BIG_ENDIAN
+		// As the compression is working with 8-bit data, on big-endian architectures we have to switch order of bytes in uncompressed data
+		uint8 *rawData = (uint8 *)data;
+		for (size_t i = 0; i < dataSize - 1; i += 2) {
+			SWAP(rawData[i], rawData[i + 1]);
+		}
+#endif
+	}
+
+	_surface.init(width, height, 2*width, data, gameDataPixelFormat());
+	_surface.convertToInPlace(screenPixelFormat());
+
+	delete[] buf;
+	delete stream;
+
+	return true;
+}
+
+void Image::copyToSurface(Graphics::Surface *dst) const {
+	dst->copyRectToSurface(_surface, 0, 0, Common::Rect(_surface.w, _surface.h));
+}
+
+} // End of namespace BladeRunner