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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2003 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 GFX_H
#define GFX_H
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 topline;
uint16 width, height;
int size;
byte alloctwobuffers;
bool scrollable;
uint16 xstart;
uint16 tdirty[80];
uint16 bdirty[80];
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;
int16 posX, posY;
uint16 width, height;
uint16 scaleX, scaleY;
uint16 image;
uint16 mode;
};
#if !defined(__GNUC__)
#pragma START_PACK_STRUCTS
#endif
struct BompHeader { /* Bomp header */
union {
struct {
uint16 unk;
uint16 width, height;
} GCC_PACK old;
struct {
uint32 width, height;
} GCC_PACK v8;
} GCC_PACK;
} GCC_PACK;
#if !defined(__GNUC__)
#pragma END_PACK_STRUCTS
#endif
struct BompDrawData { /* Bomp graphics data */
byte *out;
int outwidth, outheight;
int x, y;
byte scale_x, scale_y;
byte *dataptr;
int srcwidth, srcheight;
uint16 shadowMode;
};
class Gdi {
friend class Scumm; // Mostly for the code in saveload.cpp ...
public:
Scumm *_vm;
int _numZBuffer;
int _imgBufOffs[8];
byte _disable_zbuffer;
int32 _numStrips;
int16 _mask_top, _mask_bottom, _mask_right, _mask_left;
protected:
byte *_readPtr;
bool _useOrDecompress;
byte _cursorActive;
byte *_mask_ptr;
byte *_mask_ptr_dest;
byte _palette_mod;
byte _decomp_shr, _decomp_mask;
byte _transparentColor;
uint32 _vertStripNextInc;
/* Bitmap decompressors */
bool decompressBitmap(byte *bgbak_ptr, byte *smap_ptr, int numLinesToProcess);
void decodeStripEGA(byte *dst, byte *src, int height);
void decodeStripOldEGA(byte *dst, byte *src, int height, int stripnr);
void decompressMaskImgOld(byte *dst, byte *src, int stripnr);
void unkDecodeA(byte *dst, byte *src, int height);
void unkDecodeA_trans(byte *dst, byte *src, int height);
void unkDecodeB(byte *dst, byte *src, int height);
void unkDecodeB_trans(byte *dst, byte *src, int height);
void unkDecodeC(byte *dst, byte *src, int height);
void unkDecodeC_trans(byte *dst, byte *src, int height);
void unkDecode7(byte *dst, byte *src, int height);
void unkDecode8(byte *dst, byte *src, int height);
void unkDecode9(byte *dst, byte *src, int height);
void unkDecode10(byte *dst, byte *src, int height);
void unkDecode11(byte *dst, byte *src, int height);
void draw8ColWithMasking(byte *dst, byte *src, int height, byte *mask);
void draw8Col(byte *dst, byte *src, int height);
void clear8ColWithMasking(byte *dst, int height, byte *mask);
void clear8Col(byte *dst, int height);
void decompressMaskImgOr(byte *dst, byte *src, int height);
void decompressMaskImg(byte *dst, byte *src, int height);
void drawStripToScreen(VirtScreen *vs, int x, int w, int t, int b);
void updateDirtyScreen(VirtScreen *vs);
public:
void drawBitmap(byte *ptr, VirtScreen *vs, int x, int y, const int h, int stripnr, int numstrip, byte flag);
void clearUpperMask();
void disableZBuffer() { _disable_zbuffer++; }
void enableZBuffer() { _disable_zbuffer--; }
void resetBackground(int top, int bottom, int strip);
enum DrawBitmapFlags {
dbAllowMaskOr = 1,
dbDrawMaskOnAll = 2,
dbClear = 4
};
};
#endif
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