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engines/ultima/ultima8/gfx/shape_frame.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/ultima8/misc/common_types.h"
+
+#include "ultima/ultima8/gfx/shape_frame.h"
+#include "ultima/ultima8/gfx/raw_shape_frame.h"
+
+namespace Ultima {
+namespace Ultima8 {
+
+ShapeFrame::ShapeFrame(const RawShapeFrame *rawframe) :
+		_width(_surface.w), _height(_surface.h),
+		_xoff(rawframe->_xoff), _yoff(rawframe->_yoff),
+		_keycolor(0xFF) {
+
+	_surface.create(rawframe->_width, rawframe->_height, Graphics::PixelFormat::createFormatCLUT8());
+
+	// load adjusting keycolor until success
+	if (!load(rawframe, _keycolor)) {
+		_keycolor = 0;
+		while (!load(rawframe, _keycolor) && _keycolor < 0xFF) {
+			_keycolor++;
+		}
+	}
+}
+
+ShapeFrame::~ShapeFrame() {
+	_surface.free();
+}
+
+bool ShapeFrame::load(const RawShapeFrame *rawframe, uint8 keycolor) {
+	bool result = true;
+	uint8 *pixels = reinterpret_cast<uint8 *>(_surface.getPixels());
+	memset(pixels, keycolor, _surface.w * _surface.h);
+
+	for (int y = 0; y < _surface.h; y++) {
+		int32 xpos = 0;
+		const uint8 *linedata = rawframe->_rle_data + rawframe->_line_offsets[y];
+
+		do {
+			xpos += *linedata++;
+
+			if (xpos >= _surface.w)
+				break;
+
+			int32 dlen = *linedata++;
+			int type = 0;
+
+			if (rawframe->_compressed) {
+				type = dlen & 1;
+				dlen >>= 1;
+			}
+
+			for (int doff = 0; doff < dlen; doff++) {
+				if (*linedata == keycolor)
+					result = false;
+				pixels[y * _surface.w + xpos + doff] = *linedata;
+				if (!type) {
+					linedata++;
+				}
+			}
+
+			xpos += dlen;
+			if (type) {
+				linedata++;
+			}
+
+		} while (xpos < _surface.w);
+	}
+	return result;
+}
+
+// Checks to see if the frame has a pixel at the point
+bool ShapeFrame::hasPoint(int x, int y) const {
+	// Add the offset
+	x += _xoff;
+	y += _yoff;
+
+	// First gross culling based on dims
+	if (x < 0 || y < 0 || x >= _surface.w || y >= _surface.h)
+		return false;
+
+	return _surface.getPixel(x, y) != _keycolor;
+}
+
+// Get the pixel at the point
+uint8 ShapeFrame::getPixel(int x, int y) const {
+	// Add the offset
+	x += _xoff;
+	y += _yoff;
+
+	// First gross culling based on dims
+	if (x < 0 || y < 0 || x >= _surface.w || y >= _surface.h)
+		return _keycolor;
+
+	return _surface.getPixel(x, y);
+}
+
+} // End of namespace Ultima8
+} // End of namespace Ultima