some WIP code to start introduction (with glitches) in Kyrandia 1 :

- the decoders have been rewritten due to crashes I encountered with the previous ones in Compression::
- the wsa code loader for v1 have been rewritten too, to handle the same flags as the original
- some cleanup
- this has only been tested with the floppy version

svn-id: r18704

1 files changed, 88 insertions, 0 deletions

diff --git a/kyra/screen.h b/kyra/screen.h
new file mode 100644
index 0000000000..6ce4fa5569
--- /dev/null
+++ b/kyra/screen.h
@@ -0,0 +1,88 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2003-2005 The ScummVM project
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#ifndef KYRASCREEN_H
+#define KYRASCREEN_H
+
+#include "common/util.h"
+
+class OSystem;
+
+namespace Kyra {
+
+class CPSImage;
+class KyraEngine;
+
+class Screen {
+public:
+
+	Screen(KyraEngine *vm, OSystem *system);
+	~Screen();
+
+	void updateScreen();
+	uint8 *getPagePtr(int pageNum);
+	void clearPage(int pageNum);
+	int setCurPage(int pageNum);
+	void clearCurPage();
+	void fadeFromBlack();
+	void fadeToBlack();
+	void setScreenPalette(const uint8 *palData);
+	void copyToPage0(int y, int h, uint8 page, uint8 *seqBuf);
+	void copyRegion(int x1, int y1, int x2, int y2, int w, int h, int srcPage, int dstPage);
+	void copyBlockToPage(int pageNum, int x, int y, int w, int h, const uint8 *src);
+	void fillRect(int x1, int y1, int x2, int y2, uint8 color, int pageNum = -1);
+	void setAnimBlockPtr(uint8 *p, int size);
+	void setTextColorMap(const uint8 *cmap);
+	void setTextColor(const uint8 *cmap, int a, int b);
+	int getCharWidth(uint8 c) const;
+	int getTextWidth(const char *str) const;
+	void printText(const char *str, int x, int y, uint8 color1, uint8 color2);
+	void drawShape(uint8 pageNum, const uint8 *shapeData, int x, int y, int sd, int flags, int *flagsTable);
+	static void decodeFrame3(const uint8 *src, uint8 *dst, uint32 size);
+	static void decodeFrame4(const uint8 *src, uint8 *dst, uint32 dstSize);
+	static void decodeFrameDelta(uint8 *dst, const uint8 *src);
+	static void decodeFrameDeltaPage(uint8 *dst, const uint8 *src, int pitch);
+	
+	int _charOffset;
+	int _charWidth;
+	int _curPage;
+	uint8 *_palette1;
+
+	enum {
+		SCREEN_W  = 320,
+		SCREEN_H  = 200,
+		PAGE_SIZE = 320 * 200 + 1024,
+		PAGE_NUM  = 16
+	};
+
+private:
+
+	uint8 _textColorsMap[16];
+	uint8 *_animBlockPtr;
+	int _animBlockSize;
+	uint8 *_pagePtrs[16];
+	OSystem *_system;
+	KyraEngine *_vm;
+};
+
+} // End of namespace Kyra
+
+#endif