1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/* 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
#include "common/rect.h"
namespace Scumm {
class ScummEngine;
/** Camera modes */
enum {
kNormalCameraMode = 1,
kFollowActorCameraMode = 2,
kPanningCameraMode = 3
};
/** Camera state data */
struct CameraData {
Common::Point _cur;
Common::Point _dest;
Common::Point _accel;
Common::Point _last;
int _leftTrigger, _rightTrigger;
byte _follows, _mode;
bool _movingToActor;
};
/** Virtual screen identifiers */
enum VirtScreenNumber {
kMainVirtScreen = 0, // The 'stage'
kTextVirtScreen = 1, // In V1-V3 games: the area where text is printed
kVerbVirtScreen = 2, // The verb area
kUnkVirtScreen = 3 // ?? Not sure what this one is good for...
};
/** Virtual screen areas */
struct VirtScreen {
VirtScreenNumber number;
uint16 topline;
uint16 width, height;
byte alloctwobuffers;
bool scrollable;
uint16 xstart;
uint16 tdirty[80];
uint16 bdirty[80];
byte *screenPtr;
byte *backBuf;
void setDirtyRange(int top, int bottom) {
for (int i = 0; i < 80; i++) {
tdirty[i] = top;
bdirty[i] = bottom;
}
}
};
/** Palette cycles */
struct ColorCycle {
uint16 delay;
uint16 counter;
uint16 flags;
byte start;
byte end;
};
/** BlastObjects to draw */
struct BlastObject {
uint16 number;
int16 posX, posY;
uint16 width, height;
uint16 scaleX, scaleY;
uint16 image;
uint16 mode;
};
/** Bomp graphics data, used as parameter to ScummEngine::drawBomp. */
struct BompDrawData {
byte *out;
int outwidth, outheight;
int x, y;
byte scale_x, scale_y;
const byte *dataptr;
int srcwidth, srcheight;
uint16 shadowMode;
int32 scaleRight, scaleBottom;
byte *scalingXPtr, *scalingYPtr;
byte *maskPtr;
BompDrawData() { memset(this, 0, sizeof(*this)); }
};
struct StripTable;
class Gdi {
friend class ScummEngine; // Mostly for the code in saveload.cpp ...
ScummEngine *_vm;
public:
int _numZBuffer;
int _imgBufOffs[8];
int32 _numStrips;
Common::Rect _mask;
byte _C64Colors[4];
Gdi(ScummEngine *vm);
protected:
byte *_roomPalette;
byte _decomp_shr, _decomp_mask;
byte _transparentColor;
uint32 _vertStripNextInc;
bool _zbufferDisabled;
byte _C64CharMap[2048], _C64ObjectMap[2048], _C64PicMap[4096], _C64ColorMap[4096];
byte _C64MaskMap[4096], _C64MaskChar[4096];
bool _C64ObjectMode;
/* Bitmap decompressors */
bool decompressBitmap(byte *bgbak_ptr, const byte *src, int numLinesToProcess);
void decodeStripEGA(byte *dst, const byte *src, int height);
void decodeC64Gfx(const byte *src, byte *dst, int size);
void drawStripC64Object(byte *dst, int stripnr, int width, int height);
void drawStripC64Background(byte *dst, int stripnr, int height);
void drawStripC64Mask(byte *dst, int stripnr, int width, int height);
void unkDecodeA(byte *dst, const byte *src, int height);
void unkDecodeA_trans(byte *dst, const byte *src, int height);
void unkDecodeB(byte *dst, const byte *src, int height);
void unkDecodeB_trans(byte *dst, const byte *src, int height);
void unkDecodeC(byte *dst, const byte *src, int height);
void unkDecodeC_trans(byte *dst, const byte *src, int height);
void unkDecode7(byte *dst, const byte *src, int height);
void unkDecode8(byte *dst, const byte *src, int height);
void unkDecode9(byte *dst, const byte *src, int height);
void unkDecode10(byte *dst, const byte *src, int height);
void unkDecode11(byte *dst, const byte *src, int height);
void draw8ColWithMasking(byte *dst, const byte *src, int height, byte *mask);
void draw8Col(byte *dst, const byte *src, int height);
void clear8ColWithMasking(byte *dst, int height, byte *mask);
void clear8Col(byte *dst, int height);
void decompressMaskImgOr(byte *dst, const byte *src, int height);
void decompressMaskImg(byte *dst, const byte *src, int height);
void drawStripToScreen(VirtScreen *vs, int x, int w, int t, int b);
void updateDirtyScreen(VirtScreen *vs);
public:
void drawBitmap(const byte *ptr, VirtScreen *vs, int x, int y, const int width, const int height,
int stripnr, int numstrip, byte flag, StripTable *table = 0);
StripTable *generateStripTable(const byte *src, int width, int height, StripTable *table);
void clearCharsetMask();
void disableZBuffer() { _zbufferDisabled = true; }
void enableZBuffer() { _zbufferDisabled = false; }
void resetBackground(int top, int bottom, int strip);
enum DrawBitmapFlags {
dbAllowMaskOr = 1,
dbDrawMaskOnAll = 2,
dbClear = 4
};
};
// If you want to try buggy hacked smooth scrolling support in The Dig, enable
// the following preprocessor flag by uncommenting it.
//
// Note: This is purely experimental, NOT WORKING COMPLETLY and very buggy.
// Please do not make reports about problems with it - this is only in CVS
// to get it fixed and so that really interested parties can experiment it.
// It is NOT FIT FOR GENERAL USAGE! You have been warned.
//
// Doing this correctly will be complicated. Basically, with smooth scrolling,
// the virtual screen strips don't match the display screen strips. Hence we
// either have to draw partial strips (but that'd be rather cumbersome). Or the
// alternative (and IMHO more elegant) solution is to simply use a screen pitch
// that is 8 pixel wider than the real screen width, and always draw one strip
// more than needed to the backbuf. This will still require quite some code to
// be changed but should otherwise be relatively easy to understand, and using
// VirtScreen::pitch will actually clean up the code.
//
// #define V7_SMOOTH_SCROLLING_HACK
} // End of namespace Scumm
#endif
|
