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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001/2002 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.
*
* $Header$
*
*/
enum VideoMode { /* Video scalers */
VIDEO_SCALE = 0,
VIDEO_2XSAI = 1,
VIDEO_SUPERSAI = 2,
VIDEO_SUPEREAGLE = 3
};
enum { /* Camera modes */
CM_NORMAL = 1,
CM_FOLLOW_ACTOR = 2,
CM_PANNING = 3
};
struct CameraData { /* Camera state data */
ScummPoint _cur;
ScummPoint _dest;
ScummPoint _accel;
ScummPoint _last;
int _leftTrigger, _rightTrigger;
byte _follows, _mode;
bool _movingToActor;
};
struct VirtScreen { /* Virtual screen areas */
int number;
uint16 unk1;
uint16 topline;
uint16 width,height;
uint16 size;
byte alloctwobuffers;
byte scrollable;
uint16 xstart;
byte tdirty[40];
byte bdirty[40];
byte *screenPtr;
byte *backBuf;
};
struct MouseCursor { /* Mouse cursor */
int8 hotspot_x, hotspot_y;
byte colors[4];
byte data[32];
};
struct ColorCycle { /* Palette cycles */
uint16 delay;
uint16 counter;
uint16 flags;
byte start;
byte end;
};
struct BlastObject { /* BlastObjects to draw */
uint16 number,areaX,areaY,areaWidth,areaHeight;
int16 posX,posY;
uint16 width,height;
uint16 unk3,unk4,image;
uint16 mode;
};
struct BompHeader { /* Bomp header */
uint16 unk;
uint16 width,height;
} GCC_PACK;
struct BompDrawData { /* Bomp graphics data */
byte *out;
int outwidth, outheight;
int x,y;
byte scale_x, scale_y;
byte *dataptr;
int srcwidth, srcheight;
};
struct Gdi {
Scumm *_vm;
byte *_readPtr;
uint _readOffs;
int _numZBuffer;
int _imgBufOffs[4];
byte _disable_zbuffer;
bool _useOrDecompress;
byte _numLinesToProcess;
byte _tempNumLines;
byte _currentX;
byte _hotspot_x;
byte _hotspot_y;
byte _cursorActive;
int16 _drawMouseX;
int16 _drawMouseY;
int16 _mask_top, _mask_bottom, _mask_right, _mask_left;
byte _currentCursor;
byte _mouseColors[4];
byte _mouseColor;
byte _mouseClipMask1, _mouseClipMask2, _mouseClipMask3;
byte _mouseColorIndex;
byte *_mouseMaskPtr;
byte *_smap_ptr;
byte *_backbuff_ptr;
byte *_bgbak_ptr;
byte *_mask_ptr;
byte *_mask_ptr_dest;
byte *_z_plane_ptr;
byte _palette_mod;
byte _decomp_shr, _decomp_mask;
byte _transparency;
uint16 _vertStripNextInc;
byte *_backupIsWhere;
/* Bitmap decompressors */
void decompressBitmap();
void unkDecode1();
void unkDecode2();
void unkDecode3();
void unkDecode4();
void unkDecode5();
void unkDecode6();
void unkDecode7();
void unkDecode8();
void unkDecode9();
void unkDecode10();
void unkDecode11();
void drawBitmap(byte *ptr, VirtScreen *vs, int x, int y, int h, int stripnr, int numstrip, byte flag);
void clearUpperMask();
void disableZBuffer() { _disable_zbuffer++; }
void enableZBuffer() { _disable_zbuffer--; }
void draw8ColWithMasking();
void clear8ColWithMasking();
void clear8Col();
void decompressMaskImgOr();
void decompressMaskImg();
void resetBackground(byte top, byte bottom, int strip);
void drawStripToScreen(VirtScreen *vs, int x, int w, int t, int b);
void updateDirtyScreen(VirtScreen *vs);
enum DrawBitmapFlags {
dbAllowMaskOr = 1,
dbDrawMaskOnBoth = 2,
dbClear = 4
};
};
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