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video.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004 Ivan Dubrov
 * 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/gob/video.h $
 * $Id: video.h 22410 2006-05-11 19:43:30Z drmccoy $
 *
 */
#ifndef GOB_VIDEO_H
#define GOB_VIDEO_H

#include "common/stdafx.h"
#include "common/util.h"
#include "gob/gob.h"

namespace Gob {

#define VID_SET_CURSOR(val) { _AH = 1; _CX = (val); geninterrupt(0x10); }
#define VID_RESTORE_MODE { _AX = 3; geninterrupt(0x10); }

#define TEXT_VID_SEG    0xB800
#define TEXT_VID_OFF    0
#define TEXT_COL_COUNT  80
#define TEXT_ROW_COUNT  25

extern int16 setAllPalette;

class Video {
public:
      struct SurfaceDesc {
            int16 width;
            int16 height;
            int8 reserved1;
            int8 flag;
            int16 vidMode;
            byte *vidPtr;
            int16 reserved2;
            SurfaceDesc() : width(0), height(0), reserved1(0), flag(0),
                                      vidMode(0), vidPtr(0), reserved2(0) {}
      };

      struct FontDesc {
            char *dataPtr;
            int8 itemWidth;
            int8 itemHeight;
            int8 startItem;
            int8 endItem;
            int8 itemSize;
            int8 bitWidth;
            void *extraData;
            FontDesc() : dataPtr(0), itemWidth(0), itemHeight(0), startItem(0),
                                 endItem(0), itemSize(0), bitWidth(0) {}
      };

#define GDR_VERSION     4

#define PRIMARY_SURFACE       0x80
#define RETURN_PRIMARY        0x01
#define DISABLE_SPR_ALLOC     0x20

#pragma START_PACK_STRUCTS

      struct Color {
            byte red;
            byte green;
            byte blue;
      } GCC_PACK;

#pragma END_PACK_STRUCTS

      struct PalDesc {
            Color *vgaPal;
            int16 *unused1;
            int16 *unused2;
            PalDesc() : vgaPal(0), unused1(0), unused2(0) {}
      };

      bool _extraMode;

      Video(class GobEngine *vm);
      virtual ~Video() {};
      int32 getRectSize(int16 width, int16 height, int16 flag, int16 mode);
      void freeSurfDesc(SurfaceDesc * surfDesc);
      int16 clampValue(int16 val, int16 max);
      void drawSprite(SurfaceDesc * source, SurfaceDesc * dest, int16 left,
                              int16 top, int16 right, int16 bottom, int16 x, int16 y, int16 transp);
      void fillRect(SurfaceDesc * dest, int16 left, int16 top, int16 right, int16 bottom,
                          int16 color);
      void drawLine(SurfaceDesc * dest, int16 x0, int16 y0, int16 x1, int16 y1,
                          int16 color);
      void putPixel(int16 x, int16 y, int16 color, SurfaceDesc * dest);
      void drawCircle(Video::SurfaceDesc *dest, int16 x, int16 y, int16 radius, int16 color);
      void clearSurf(SurfaceDesc * dest);
      void drawPackedSprite(byte *sprBuf, int16 width, int16 height, int16 x, int16 y,
                                      int16 transp, SurfaceDesc * dest);
      void setPalElem(int16 index, char red, char green, char blue, int16 unused,
                              int16 vidMode);
      void setPalette(PalDesc * palDesc);
      void setFullPalette(PalDesc * palDesc);
      void initPrimary(int16 mode);
      void freeDriver(void);
      void setHandlers();

      virtual void drawLetter(int16 item, int16 x, int16 y, FontDesc * fontDesc,
                  int16 color1, int16 color2, int16 transp, SurfaceDesc * dest) = 0;
      virtual SurfaceDesc *initSurfDesc(int16 vidMode, int16 width, int16 height, int16 flags) = 0;
      virtual void waitRetrace(int16) = 0;
      virtual char spriteUncompressor(byte *sprBuf, int16 srcWidth, int16 srcHeight,
                  int16 x, int16 y, int16 transp, SurfaceDesc * destDesc) = 0;

protected:
      class VideoDriver *_videoDriver;
      GobEngine *_vm;

      char initDriver(int16 vidMode);
};

class Video_v1 : public Video {
public:
      virtual void drawLetter(int16 item, int16 x, int16 y, FontDesc * fontDesc,
                  int16 color1, int16 color2, int16 transp, SurfaceDesc * dest);
      virtual SurfaceDesc *initSurfDesc(int16 vidMode, int16 width, int16 height, int16 flags);
      virtual void waitRetrace(int16);
      virtual char spriteUncompressor(byte *sprBuf, int16 srcWidth, int16 srcHeight,
                  int16 x, int16 y, int16 transp, SurfaceDesc * destDesc);

      Video_v1(GobEngine *vm);
      virtual ~Video_v1() {};
};

class Video_v2 : public Video_v1 {
public:
      virtual void drawLetter(int16 item, int16 x, int16 y, FontDesc * fontDesc,
                  int16 color1, int16 color2, int16 transp, SurfaceDesc * dest);
      virtual SurfaceDesc *initSurfDesc(int16 vidMode, int16 width, int16 height, int16 flags);
      virtual void waitRetrace(int16);
      virtual char spriteUncompressor(byte *sprBuf, int16 srcWidth, int16 srcHeight,
                  int16 x, int16 y, int16 transp, SurfaceDesc * destDesc);

      Video_v2(GobEngine *vm);
      virtual ~Video_v2() {};
};

class VideoDriver {
public:
      VideoDriver() {}
      virtual ~VideoDriver() {}
      virtual void drawSprite(Video::SurfaceDesc *source, Video::SurfaceDesc *dest, int16 left, int16 top, int16 right, int16 bottom, int16 x, int16 y, int16 transp) = 0;
      virtual void fillRect(Video::SurfaceDesc *dest, int16 left, int16 top, int16 right, int16 bottom, byte color) = 0;
      virtual void putPixel(int16 x, int16 y, byte color, Video::SurfaceDesc *dest) = 0;
      virtual void drawLetter(unsigned char item, int16 x, int16 y, Video::FontDesc *fontDesc, byte color1, byte color2, byte transp, Video::SurfaceDesc *dest) = 0;
      virtual void drawLine(Video::SurfaceDesc *dest, int16 x0, int16 y0, int16 x1, int16 y1, byte color) = 0;
      virtual void drawPackedSprite(byte *sprBuf, int16 width, int16 height, int16 x, int16 y, byte transp, Video::SurfaceDesc *dest) = 0;
};

}                       // End of namespace Gob

#endif

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