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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2006 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 file 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.
*
* $URL$
* $Id$
*
*/
#include "common/stdafx.h"
#include "common/system.h"
#include "common/savefile.h"
#include "graphics/scaler.h"
#include "scumm/scumm.h"
namespace Scumm {
#define THMB_VERSION 1
#if !defined(__GNUC__)
#pragma START_PACK_STRUCTS
#endif
struct ThumbnailHeader {
uint32 type;
uint32 size;
byte version;
uint16 width, height;
byte bpp;
} GCC_PACK;
#if !defined(__GNUC__)
#pragma END_PACK_STRUCTS
#endif
inline void colorToRGB(uint16 color, uint8 &r, uint8 &g, uint8 &b) {
r = (((color >> 11) & 0x1F) << 3);
g = (((color >> 5) & 0x3F) << 2);
b = ((color&0x1F) << 3);
}
Graphics::Surface *ScummEngine::loadThumbnail(Common::InSaveFile *file) {
ThumbnailHeader header;
header.type = file->readUint32BE();
// We also accept the bad 'BMHT' header here, for the sake of compatibility
// with some older savegames which were written incorrectly due to a bug in
// ScummVM which wrote the thumb header type incorrectly on LE systems.
if (header.type != MKID_BE('THMB') && header.type != MKID_BE('BMHT'))
return 0;
header.size = file->readUint32BE();
header.version = file->readByte();
if (header.version > THMB_VERSION) {
file->skip(header.size - 9);
warning("Loading a newer thumbnail version");
return 0;
}
header.width = file->readUint16BE();
header.height = file->readUint16BE();
header.bpp = file->readByte();
// TODO: support other bpp values than 2
if (header.bpp != 2) {
file->skip(header.size - 14);
return 0;
}
Graphics::Surface *thumb = new Graphics::Surface();
thumb->create(header.width, header.height, sizeof(uint16));
uint16* pixels = (uint16 *)thumb->pixels;
for (int y = 0; y < thumb->h; ++y) {
for (int x = 0; x < thumb->w; ++x) {
uint8 r, g, b;
colorToRGB(file->readUint16BE(), r, g, b);
// converting to current OSystem Color
*pixels++ = _system->RGBToColor(r, g, b);
}
}
return thumb;
}
void ScummEngine::saveThumbnail(Common::OutSaveFile *file) {
Graphics::Surface thumb;
#ifndef PALMOS_68K
if (!createThumbnailFromScreen(&thumb))
#endif
thumb.create(kThumbnailWidth, kThumbnailHeight2, sizeof(uint16));
ThumbnailHeader header;
header.type = MKID_BE('THMB');
#if defined(PALMOS_ARM) || defined(__GP32__)
// sizeof(header) is hardcoded here, because the compiler add padding to
// have a 4byte aligned struct and there is no easy way to pack it.
header.size = 14 + thumb.w*thumb.h*thumb.bytesPerPixel;
#else
header.size = sizeof(header) + thumb.w*thumb.h*thumb.bytesPerPixel;
#endif
header.version = THMB_VERSION;
header.width = thumb.w;
header.height = thumb.h;
header.bpp = thumb.bytesPerPixel;
file->writeUint32BE(header.type);
file->writeUint32BE(header.size);
file->writeByte(header.version);
file->writeUint16BE(header.width);
file->writeUint16BE(header.height);
file->writeByte(header.bpp);
// TODO: for later this shouldn't be casted to uint16...
uint16* pixels = (uint16 *)thumb.pixels;
for (uint16 p = 0; p < thumb.w*thumb.h; ++p, ++pixels)
file->writeUint16BE(*pixels);
thumb.free();
}
} // end of namespace Scumm
|
