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screen.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/kyra/screen.h,v 1.7.2.1 2005/10/18 02:11:19 sev Exp $
 *
 */

#ifndef KYRASCREEN_H
#define KYRASCREEN_H

#include "common/util.h"

class OSystem;

namespace Kyra {

class KyraEngine;

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 charBoxHeight;
      uint16 charBitmapOffset;
      uint16 charWidthTableOffset;
      uint16 charHeightTableOffset;
};

class Screen {
public:

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

      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_NUM
      };
      
      Screen(KyraEngine *vm, OSystem *system);
      ~Screen();

      void updateScreen();
      uint8 *getPagePtr(int pageNum);
      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 fadePalette(const uint8 *palData, int delay);
      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 copyCurPageBlock(int x, int y, int h, int w, 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 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 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(char 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, 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);
      void copyRegionToBuffer(int pageNum, int x, int y, int w, int h, uint8 *dest);

      int _charWidth;
      int _charOffset;
      int _curPage;
      uint8 *_currentPalette;
      
      typedef void (Screen::*DrawShapePlotPixelCallback)(uint8 *dst, uint8 c);

private:

      uint8 *_pagePtrs[16];
      uint8 *_screenPalette;
      const ScreenDim *_curDim;
      FontId _currentFont;
      Font _fonts[FID_NUM];
      uint8 _textColorsMap[16];
      uint8 *_decodeShapeBuffer;
      int _decodeShapeBufferSize;
      uint8 *_animBlockPtr;
      int _animBlockSize;

      OSystem *_system;
      KyraEngine *_vm;
      
      static const ScreenDim _screenDimTable[];
      static const int _screenDimTableCount;
      static const DrawShapePlotPixelCallback _drawShapePlotPixelTable[];
      static const int _drawShapePlotPixelCount;
};

} // End of namespace Kyra

#endif

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