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
|
/* 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.
*
* $URL$
* $Id$
*
*/
#ifndef GRAPHICS_SCALER_INTERN_H
#define GRAPHICS_SCALER_INTERN_H
#include "common/scummsys.h"
#include "graphics/colormasks.h"
#define highBits Graphics::ColorMasks<bitFormat>::highBits
#define lowBits Graphics::ColorMasks<bitFormat>::lowBits
#define qhighBits Graphics::ColorMasks<bitFormat>::qhighBits
#define qlowBits Graphics::ColorMasks<bitFormat>::qlowBits
#define redblueMask Graphics::ColorMasks<bitFormat>::kRedBlueMask
#define greenMask Graphics::ColorMasks<bitFormat>::kGreenMask
/**
* Interpolate two 16 bit pixel *pairs* at once with equal weights 1.
* In particular, A and B can contain two pixels/each in the upper
* and lower halves.
*/
template<int bitFormat>
static inline uint32 interpolate32_1_1(uint32 A, uint32 B) {
return (((A & highBits) >> 1) + ((B & highBits) >> 1) + (A & B & lowBits));
}
/**
* Interpolate two 16 bit pixel *pairs* at once with weights 3 resp. 1.
* In particular, A and B can contain two pixels/each in the upper
* and lower halves.
*/
template<int bitFormat>
static inline uint32 interpolate32_3_1(uint32 A, uint32 B) {
register uint32 x = ((A & qhighBits) >> 2) * 3 + ((B & qhighBits) >> 2);
register uint32 y = ((A & qlowBits) * 3 + (B & qlowBits)) >> 2;
y &= qlowBits;
return x + y;
}
/**
* Interpolate four 16 bit pixel pairs at once with equal weights 1.
* In particular, A and B can contain two pixels/each in the upper
* and lower halves.
*/
template<int bitFormat>
static inline uint32 interpolate32_1_1_1_1(uint32 A, uint32 B, uint32 C, uint32 D) {
register uint32 x = ((A & qhighBits) >> 2) + ((B & qhighBits) >> 2) + ((C & qhighBits) >> 2) + ((D & qhighBits) >> 2);
register uint32 y = ((A & qlowBits) + (B & qlowBits) + (C & qlowBits) + (D & qlowBits)) >> 2;
y &= qlowBits;
return x + y;
}
/**
* Interpolate two 16 bit pixels with the weights specified in the template
* parameters. Used by the hq scaler family.
* @note w1 and w2 must sum up to 2, 4, 8 or 16.
*/
template<int bitFormat, int w1, int w2>
static inline uint16 interpolate16_2(uint16 p1, uint16 p2) {
return ((((p1 & redblueMask) * w1 + (p2 & redblueMask) * w2) / (w1 + w2)) & redblueMask) |
((((p1 & greenMask) * w1 + (p2 & greenMask) * w2) / (w1 + w2)) & greenMask);
}
/**
* Interpolate three 16 bit pixels with the weights specified in the template
* parameters. Used by the hq scaler family.
* @note w1, w2 and w3 must sum up to 2, 4, 8 or 16.
*/
template<int bitFormat, int w1, int w2, int w3>
static inline uint16 interpolate16_3(uint16 p1, uint16 p2, uint16 p3) {
return ((((p1 & redblueMask) * w1 + (p2 & redblueMask) * w2 + (p3 & redblueMask) * w3) / (w1 + w2 + w3)) & redblueMask) |
((((p1 & greenMask) * w1 + (p2 & greenMask) * w2 + (p3 & greenMask) * w3) / (w1 + w2 + w3)) & greenMask);
}
/**
* Compare two YUV values (encoded 8-8-8) and check if they differ by more than
* a certain hard coded threshold. Used by the hq scaler family.
*/
static inline bool diffYUV(int yuv1, int yuv2) {
static const int Ymask = 0x00FF0000;
static const int Umask = 0x0000FF00;
static const int Vmask = 0x000000FF;
static const int trY = 0x00300000;
static const int trU = 0x00000700;
static const int trV = 0x00000006;
int diff;
int mask;
diff = ((yuv1 & Ymask) - (yuv2 & Ymask));
mask = diff >> 31; // -1 if value < 0, 0 otherwise
diff = (diff ^ mask) - mask; //-1: ~value + 1; 0: value
if (diff > trY) return true;
diff = ((yuv1 & Umask) - (yuv2 & Umask));
mask = diff >> 31; // -1 if value < 0, 0 otherwise
diff = (diff ^ mask) - mask; //-1: ~value + 1; 0: value
if (diff > trU) return true;
diff = ((yuv1 & Vmask) - (yuv2 & Vmask));
mask = diff >> 31; // -1 if value < 0, 0 otherwise
diff = (diff ^ mask) - mask; //-1: ~value + 1; 0: value
if (diff > trV) return true;
return false;
/*
return
( ( ABS((yuv1 & Ymask) - (yuv2 & Ymask)) > trY ) ||
( ABS((yuv1 & Umask) - (yuv2 & Umask)) > trU ) ||
( ABS((yuv1 & Vmask) - (yuv2 & Vmask)) > trV ) );
*/
}
/**
* 16bit RGB to YUV conversion table. This table is setup by InitLUT().
* Used by the hq scaler family.
*/
extern "C" uint32 *RGBtoYUV;
/** Auxiliary macro to simplify creating those template function wrappers. */
#define MAKE_WRAPPER(FUNC) \
void FUNC(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height) { \
if (gBitFormat == 565) \
FUNC ## Template<565>(srcPtr, srcPitch, dstPtr, dstPitch, width, height); \
else \
FUNC ## Template<555>(srcPtr, srcPitch, dstPtr, dstPitch, width, height); \
}
/** Specifies the currently active 16bit pixel format, 555 or 565. */
extern int gBitFormat;
#endif
|
