Initial commit

engines/ultima/ultima4/gfx/imageloader_fmtowns.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 "ultima/ultima4/core/utils.h"
+#include "ultima/ultima4/gfx/imageloader_fmtowns.h"
+#include "ultima/ultima4/gfx/imageloader_u4.h"
+
+#include "common/stream.h"
+#include "common/textconsole.h"
+#include "graphics/surface.h"
+
+namespace Ultima {
+namespace Ultima4 {
+
+bool FMTOWNSImageDecoder::loadStream(Common::SeekableReadStream &stream) {
+	destroy();
+
+	if (_width == -1 || _height == -1 || _bpp == -1) {
+		error("dimensions not set for fmtowns image");
+	}
+
+	assertMsg((_bpp == 16) | (_bpp == 4), "invalid bpp: %d", _bpp);
+
+	int rawLen = stream.size() - _offset;
+	int requiredLength = (_width * _height * _bpp / 8);
+	if (rawLen < requiredLength) {
+		warning("FMTOWNS Image of size %d does not fit anticipated size %d", rawLen, requiredLength);
+		return false;
+	}
+
+	stream.seek(_offset, 0);
+	byte *raw = (byte *) malloc(rawLen);
+	stream.read(raw, rawLen);
+
+
+	if (_bpp == 4) {
+		_surface = new Graphics::Surface();
+		_surface->create(_width, _height, Graphics::PixelFormat::createFormatCLUT8());
+		setFromRawData(raw);
+
+		U4PaletteLoader pal;
+		_palette.resize(16, false);
+		_palette.set(pal.loadEgaPalette(), 0, 16);
+	}
+
+
+	if (_bpp == 16) {
+		_surface = new Graphics::Surface();
+		_surface->create(_width, _height, Graphics::PixelFormat(2, 5, 5, 5, 1, 5, 10, 0, 15));
+
+		uint16 *dst = (uint16 *)_surface->getPixels();
+		const uint16 *src = (const uint16 *)raw;
+
+		for (int y = 0; y < _height; y++) {
+			for (int x = 0; x < _width; x++) {
+				dst[x] = FROM_LE_16(*src++) ^ 0x8000;
+			}
+
+			dst = (uint16 *)((uint8 *)dst + _surface->pitch);
+		}
+	}
+
+	free(raw);
+
+	return true;
+}
+
+} // End of namespace Ultima4
+} // End of namespace Ultima