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screen.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/engines/kyra/screen.h $
 * $Id: screen.h 23906 2006-09-17 09:54:42Z lordhoto $
 *
 */

#ifndef KYRASCREEN_H
#define KYRASCREEN_H

#include "common/util.h"

class OSystem;

namespace Kyra {

class KyraEngine;
class Debugger;
struct Rect;

struct ScreenDim {
      uint16 sx;
      uint16 sy;
      uint16 w;
      uint16 h;
      uint16 unk8;
      uint16 unkA;
      uint16 unkC;
      uint16 unkE;
};

struct Font {
      uint8 *fontData;
      uint8 *charWidthTable;
      uint16 charSizeOffset;
      uint16 charBitmapOffset;
      uint16 charWidthTableOffset;
      uint16 charHeightTableOffset;
};

class Screen {
      friend class Debugger;
public:

      enum {
            SCREEN_W = 320,
            SCREEN_H = 200,
            SCREEN_PAGE_SIZE = 320 * 200 + 1024,
            SCREEN_PAGE_NUM  = 16
      };

      enum CopyRegionFlags {
            CR_X_FLIPPED  = 0x01,
            CR_CLIPPED    = 0x02,
            CR_NO_P_CHECK = 0x04
      };

      enum DrawShapeFlags {
            DSF_X_FLIPPED  = 0x01,
            DSF_Y_FLIPPED  = 0x02,
            DSF_SCALE      = 0x04,
            DSF_WND_COORDS = 0x10,
            DSF_CENTER     = 0x20
      };
      
      enum FontId {
            FID_6_FNT = 0,
            FID_8_FNT,
            FID_CRED6_FNT,
            FID_CRED8_FNT,
            FID_NUM
      };
      
      Screen(KyraEngine *vm, OSystem *system);
      ~Screen();

      bool init();

      void updateScreen();
      const uint8 *getCPagePtr(int pageNum) const;
      uint8 *getPageRect(int pageNum, int x, int y, int w, int h);
      void clearPage(int pageNum);
      int setCurPage(int pageNum);
      void clearCurPage();
      uint8 getPagePixel(int pageNum, int x, int y);
      void setPagePixel(int pageNum, int x, int y, uint8 color);
      void fadeFromBlack();
      void fadeToBlack();
      void fadeSpecialPalette(int palIndex, int startIndex, int size, int fadeTime);
      void fadePalette(const uint8 *palData, int delay);
      void setPaletteIndex(uint8 index, uint8 red, uint8 green, uint8 blue);
      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, int flags=0);
      void copyBlockToPage(int pageNum, int x, int y, int w, int h, const uint8 *src);
      void copyFromCurPageBlock(int x, int y, int w, int h, const uint8 *src);
      void copyCurPageBlock(int x, int y, int w, int h, uint8 *dst);
      void shuffleScreen(int sx, int sy, int w, int h, int srcPage, int dstPage, int ticks, bool transparent);
      void fillRect(int x1, int y1, int x2, int y2, uint8 color, int pageNum = -1);
      void drawLine(bool vertical, int x, int y, int length, int color);
      void drawClippedLine(int x1, int y1, int x2, int y2, int color);
      void drawShadedBox(int x1, int y1, int x2, int y2, int color1, int color2);
      void drawBox(int x1, int y1, int x2, int y2, int color);
      void setAnimBlockPtr(int size);
      void setTextColorMap(const uint8 *cmap);
      void setTextColor(const uint8 *cmap, int a, int b);
      void loadFont(FontId fontId, uint8 *fontData);
      FontId setFont(FontId fontId);
      int getFontHeight() const;
      int getFontWidth() const;
      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 drawChar(uint8 c, int x, int y);
      void setScreenDim(int dim);
      void drawShapePlotPixelCallback1(uint8 *dst, uint8 color);
      void drawShape(uint8 pageNum, const uint8 *shapeData, int x, int y, int sd, int flags, ...);
      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 noXor);
      uint8 *encodeShape(int x, int y, int w, int h, int flags);
      void copyRegionToBuffer(int pageNum, int x, int y, int w, int h, uint8 *dest);
      void loadBitmap(const char *filename, int tempPage, int dstPage, uint8 *palData);

      void shakeScreen(int times);

      int getRectSize(int x, int y);
      void hideMouse();
      void showMouse();
      void setShapePages(int page1, int page2);
      void setMouseCursor(int x, int y, byte *shape);
      uint8 *getPalette(int num);
      
      byte getShapeFlag1(int x, int y);
      byte getShapeFlag2(int x, int y);
      int setNewShapeHeight(uint8 *shape, int height);
      int resetShapeHeight(uint8 *shape);
      
      void addBitBlitRect(int x, int y, int w, int h);
      void bitBlitRects();
      
      void savePageToDisk(const char *file, int page);
      void loadPageFromDisk(const char *file, int page);
      void deletePageFromDisk(int page);

      void blockInRegion(int x, int y, int width, int height);
      void blockOutRegion(int x, int y, int width, int height);

      void backUpRect0(int xpos, int ypos);
      void restoreRect0(int xpos, int ypos);
      void backUpRect1(int xpos, int ypos);
      void restoreRect1(int xpos, int ypos);
      void copyBackgroundBlock(int x, int page, int flag);
      void copyBackgroundBlock2(int x);
      void rectClip(int &x, int &y, int w, int h);
      int getDrawLayer(int x, int y);
      int getDrawLayer2(int x, int y, int height);

      int _charWidth;
      int _charOffset;
      int _curPage;
      uint8 *_currentPalette;
      uint8 *_shapePages[2];
      FontId _currentFont;

      const ScreenDim *_curDim;
      
      static const ScreenDim _screenDimTable[];
      static const int _screenDimTableCount;

      // maybe subclass screen for kyra3
      static const ScreenDim _screenDimTableK3[];
      static const int _screenDimTableCountK3;
private:
      uint8 *getPagePtr(int pageNum);

      int16 encodeShapeAndCalculateSize(uint8 *from, uint8 *to, int size);
      void restoreMouseRect();
      void copyMouseToScreen();
      void copyScreenFromRect(int x, int y, int w, int h, const uint8 *ptr);
      void copyScreenToRect(int x, int y, int w, int h, uint8 *ptr);

      uint8 *_pagePtrs[16];
      uint8 *_saveLoadPage[8];
      uint8 *_screenPalette;
      uint8 *_palettes[3];
      Font _fonts[FID_NUM];
      uint8 _textColorsMap[16];
      uint8 *_decodeShapeBuffer;
      int _decodeShapeBufferSize;
      uint8 *_animBlockPtr;
      int _animBlockSize;
      int _mouseLockCount;
      
      Rect *_bitBlitRects;
      int _bitBlitNum;
      uint8 *_unkPtr1, *_unkPtr2;
      
      enum {
            kMaxDirtyRects = 50
      };
      
      bool _forceFullUpdate;
      int _numDirtyRects;
      Rect *_dirtyRects;
      
      void addDirtyRect(int x, int y, int w, int h);

      OSystem *_system;
      KyraEngine *_vm;
};

} // End of namespace Kyra

#endif

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