Initial commit

image/xbm.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 "image/xbm.h"
+
+#include "common/textconsole.h"
+#include "graphics/pixelformat.h"
+#include "graphics/surface.h"
+
+namespace Image {
+
+static const byte xbmPalette[2 * 3] = {
+	0xFF, 0xFF, 0xFF,
+	0x00, 0x00, 0x00
+};
+
+XBMDecoder::XBMDecoder() : _surface(nullptr), _palette(xbmPalette, 2) {
+}
+
+XBMDecoder::~XBMDecoder() {
+	destroy();
+}
+
+void XBMDecoder::destroy() {
+	if (_surface) {
+		_surface->free();
+		delete _surface;
+		_surface = 0;
+	}
+
+}
+
+bool XBMDecoder::loadStream(Common::SeekableReadStream &stream) {
+	destroy();
+
+	warning("External XBM files are not yet supported");
+	return false;
+}
+
+bool XBMDecoder::loadBits(const unsigned char *bits, int width, int height) {
+	destroy();
+
+	_surface = new Graphics::Surface();
+	_surface->create(width, height, Graphics::PixelFormat::createFormatCLUT8());
+
+	for (int i = 0; i < height; i++) {
+		byte *dst = (byte *)_surface->getBasePtr(0, i);
+		for (int j = 0; j != width;) {
+			byte color = *bits++;
+			for (int k = 0; k < 8; k++) {
+				*dst++ = (color & 1);
+				color >>= 1;
+				j++;
+				if (j == width) {
+					break;
+				}
+			}
+		}
+	}
+
+	return true;
+}
+
+} // End of namespace Image