Initial commit

engines/sludge/hsi.cpp

@@ -0,0 +1,86 @@
+/* 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 "common/debug.h"
+#include "common/stream.h"
+
+#include "graphics/surface.h"
+
+#include "sludge/hsi.h"
+#include "sludge/sludge.h"
+
+namespace Sludge {
+
+HSIDecoder::HSIDecoder() : _surface(nullptr), _palette(0), _reserve(-1) {
+}
+
+HSIDecoder::~HSIDecoder() {
+	destroy();
+}
+
+void HSIDecoder::destroy() {
+	if (_surface != nullptr) {
+		_surface->free();
+		delete _surface;
+		_surface = nullptr;
+	}
+}
+
+bool HSIDecoder::loadStream(Common::SeekableReadStream &stream) {
+	destroy();
+	int32 transCol = _reserve > 0 ? -1 : 63519;
+	int n;
+	uint16 width = stream.readUint16BE();
+	debugC(2, kSludgeDebugGraphics, "picWidth : %i", width);
+	uint16 height = stream.readUint16BE();
+	debugC(2, kSludgeDebugGraphics, "picHeight : %i", height);
+
+	_surface = new Graphics::Surface();
+	_surface->create(width, height, *g_sludge->getScreenPixelFormat());
+	for (uint16 y = 0; y < height; y++) {
+		uint16 x = 0;
+		while (x < width) {
+			uint16 c = stream.readUint16BE();
+			if (c & 32) {
+				n = stream.readByte() + 1;
+				c -= 32;
+			} else {
+				n = 1;
+			}
+			while (n--) {
+				byte *target = (byte *)_surface->getBasePtr(x, y);
+				if (_reserve != -1 && (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;
+					g_sludge->getOrigPixelFormat()->colorToRGB(c, target[3], target[2], target[1]);
+				}
+				x++;
+			}
+		}
+	}
+	return true;
+}
+
+} // End of namespace Sludge