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
|
/* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "graphics/scalerplugin.h"
namespace {
/**
* Trivial 'scaler' - in fact it doesn't do any scaling but just copies the
* source to the destination.
*/
template<typename Pixel>
void Normal1x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
// Spot the case when it can all be done in 1 hit
const int BytesPerPixel = sizeof(Pixel);
if ((srcPitch == BytesPerPixel * (uint)width) && (dstPitch == BytesPerPixel * (uint)width)) {
memcpy(dstPtr, srcPtr, BytesPerPixel * width * height);
return;
}
while (height--) {
memcpy(dstPtr, srcPtr, BytesPerPixel * width);
srcPtr += srcPitch;
dstPtr += dstPitch;
}
}
} // End of anonymous namespace
void Scaler::scale(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr,
uint32 dstPitch, int width, int height, int x, int y) {
if (_factor == 1) {
if (_format.bytesPerPixel == 1) {
Normal1x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
} else if (_format.bytesPerPixel == 2) {
Normal1x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
} else {
Normal1x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
}
} else {
scaleIntern(srcPtr, srcPitch, dstPtr, dstPitch, width, height, x, y);
}
}
SourceScaler::SourceScaler(const Graphics::PixelFormat &format) : Scaler(format), _width(0), _height(0), _oldSrc(NULL), _enable(false) {
}
SourceScaler::~SourceScaler() {
if (_oldSrc != NULL)
delete[] _oldSrc;
_bufferedOutput.free();
}
void SourceScaler::setSource(const byte *src, uint pitch, int width, int height, int padding) {
if (_oldSrc != NULL)
delete[] _oldSrc;
_width = width;
_height = height;
_padding = padding;
// Give _oldSrc same pitch
int size = (height + padding * 2) * pitch;
_oldSrc = new byte[size]();
_bufferedOutput.create(_width * _factor, _height * _factor, _format);
}
uint SourceScaler::setFactor(uint factor) {
uint oldFactor = _factor;
_factor = factor;
if (factor != oldFactor && _width != 0 && _height != 0) {
_bufferedOutput.create(_width * _factor, _height * _factor, _format);
}
return oldFactor;
}
void SourceScaler::scaleIntern(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr,
uint32 dstPitch, int width, int height, int x, int y) {
if (!_enable) {
// Do not pass _oldSrc, do not update _oldSrc
internScale(srcPtr, srcPitch,
dstPtr, dstPitch,
NULL, 0,
width, height,
NULL, 0);
return;
}
int offset = (_padding + x) * _format.bytesPerPixel + (_padding + y) * srcPitch;
// Call user defined scale function
internScale(srcPtr, srcPitch,
dstPtr, dstPitch,
_oldSrc + offset, srcPitch,
width, height,
(uint8 *)_bufferedOutput.getBasePtr(x * _factor, y * _factor), _bufferedOutput.pitch);
// Update the destination buffer
byte *buffer = (byte *)_bufferedOutput.getBasePtr(x * _factor, y * _factor);
for (uint i = 0; i < height * _factor; ++i) {
memcpy(buffer, dstPtr, width * _factor * _format.bytesPerPixel);
buffer += _bufferedOutput.pitch;
dstPtr += dstPitch;
}
// Update old src
byte *oldSrc = _oldSrc + offset;
while (height--) {
memcpy(oldSrc, srcPtr, width * _format.bytesPerPixel);
oldSrc += srcPitch;
srcPtr += srcPitch;
}
}
|
