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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
*/
#ifndef GRAPHICS_SCALER_ASPECT_H
#define GRAPHICS_SCALER_ASPECT_H
#include "common/scummsys.h"
#include "graphics/scaler.h"
/**
* TODO: explain
*/
FORCEINLINE int real2Aspect(int y) {
return y + (y + 1) / 5;
}
/**
* TODO: explain
*/
FORCEINLINE int aspect2Real(int y) {
return (y * 5 + 4) / 6;
}
/**
* TODO: explain
*/
void makeRectStretchable(int &x, int &y, int &w, int &h);
/**
* TODO: explain
*/
int stretch200To240(uint8 *buf,
uint32 pitch,
int width,
int height,
int srcX,
int srcY,
int origSrcY);
/**
* This filter (up)scales the source image vertically by a factor of 6/5.
* For example, a 320x200 image is scaled to 320x240.
*
* The main difference to the code in graphics/scaler/aspect.cpp is the
* out-of-place operation, omitting a straight blit step the sdl backend
* does. Also, tests show unaligned access errors with the stock aspect scaler.
*/
DECLARE_SCALER(Normal1xAspect);
#ifdef USE_ARM_SCALER_ASM
DECLARE_SCALER(Normal2xAspect);
#endif
#endif
|
