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
|
/* Copyright (C) 2002-2004 RealVNC Ltd. All Rights Reserved.
*
* This 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 software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include <string.h>
#include <rfb/Cursor.h>
#include <rfb/LogWriter.h>
using namespace rfb;
static LogWriter vlog("Cursor");
void Cursor::setSize(int w, int h) {
int oldMaskLen = maskLen();
ManagedPixelBuffer::setSize(w, h);
if (maskLen() > oldMaskLen) {
delete [] mask.buf;
mask.buf = new rdr::U8[maskLen()];
}
}
void Cursor::drawOutline(const Pixel& c)
{
Cursor outlined;
// Create a mirror of the existing cursor
outlined.setPF(getPF());
outlined.setSize(width(), height());
outlined.hotspot = hotspot;
// Clear the mirror's background to the outline colour
outlined.fillRect(getRect(), c);
// Blit the existing cursor, using its mask
outlined.maskRect(getRect(), data, mask.buf);
// Now just adjust the mask to add the outline. The outline pixels
// will already be the right colour. :)
int maskBytesPerRow = (width() + 7) / 8;
for (int y = 0; y < height(); y++) {
for (int byte=0; byte<maskBytesPerRow; byte++) {
rdr::U8 m8 = mask.buf[y*maskBytesPerRow + byte];
// Handle above & below outline
if (y > 0) m8 |= mask.buf[(y-1)*maskBytesPerRow + byte];
if (y < height()-1) m8 |= mask.buf[(y+1)*maskBytesPerRow + byte];
// Left outline
m8 |= mask.buf[y*maskBytesPerRow + byte] << 1;
if (byte < maskBytesPerRow-1)
m8 |= (mask.buf[y*maskBytesPerRow + byte + 1] >> 7) & 1;
// Right outline
m8 |= mask.buf[y*maskBytesPerRow + byte] >> 1;
if (byte > 0)
m8 |= (mask.buf[y*maskBytesPerRow + byte - 1] << 7) & 128;
outlined.mask.buf[y*maskBytesPerRow + byte] = m8;
}
}
// Replace the existing cursor & mask with the new one
delete [] data;
delete [] mask.buf;
data = outlined.data; outlined.data = 0;
mask.buf = outlined.mask.buf; outlined.mask.buf = 0;
}
rdr::U8* Cursor::getBitmap(Pixel* pix0, Pixel* pix1)
{
bool gotPix0 = false;
bool gotPix1 = false;
rdr::U8Array source(maskLen());
memset(source.buf, 0, maskLen());
int maskBytesPerRow = (width() + 7) / 8;
for (int y = 0; y < height(); y++) {
for (int x = 0; x < width(); x++) {
int byte = y * maskBytesPerRow + x / 8;
int bit = 7 - x % 8;
if (mask.buf[byte] & (1 << bit)) {
Pixel pix=0;
switch (getPF().bpp) {
case 8: pix = ((rdr::U8*) data)[y * width() + x]; break;
case 16: pix = ((rdr::U16*)data)[y * width() + x]; break;
case 32: pix = ((rdr::U32*)data)[y * width() + x]; break;
}
if (!gotPix0 || pix == *pix0) {
gotPix0 = true;
*pix0 = pix;
} else if (!gotPix1 || pix == *pix1) {
gotPix1 = true;
*pix1 = pix;
source.buf[byte] |= (1 << bit);
} else {
// not a bitmap
return 0;
}
}
}
}
return source.takeBuf();
}
// crop() determines the "busy" rectangle for the cursor - the minimum bounding
// rectangle containing actual pixels. This isn't the most efficient algorithm
// but it's short. For sanity, we make sure that the busy rectangle always
// includes the hotspot (the hotspot is unsigned on the wire so otherwise it
// would cause problems if it was above or left of the actual pixels)
void Cursor::crop()
{
Rect busy = getRect().intersect(Rect(hotspot.x, hotspot.y,
hotspot.x+1, hotspot.y+1));
int maskBytesPerRow = (width() + 7) / 8;
int x, y;
for (y = 0; y < height(); y++) {
for (x = 0; x < width(); x++) {
int byte = y * maskBytesPerRow + x / 8;
int bit = 7 - x % 8;
if (mask.buf[byte] & (1 << bit)) {
if (x < busy.tl.x) busy.tl.x = x;
if (x+1 > busy.br.x) busy.br.x = x+1;
if (y < busy.tl.y) busy.tl.y = y;
if (y+1 > busy.br.y) busy.br.y = y+1;
}
}
}
if (width() == busy.width() && height() == busy.height()) return;
vlog.debug("cropping %dx%d to %dx%d", width(), height(),
busy.width(), busy.height());
// Copy the pixel data
int newDataLen = busy.area() * (getPF().bpp/8);
rdr::U8* newData = new rdr::U8[newDataLen];
getImage(newData, busy);
// Copy the mask
int newMaskBytesPerRow = (busy.width()+7)/8;
int newMaskLen = newMaskBytesPerRow * busy.height();
rdr::U8* newMask = new rdr::U8[newMaskLen];
memset(newMask, 0, newMaskLen);
for (y = 0; y < busy.height(); y++) {
int newByte, newBit;
for (x = 0; x < busy.width(); x++) {
int oldByte = (y+busy.tl.y) * maskBytesPerRow + (x+busy.tl.x) / 8;
int oldBit = 7 - (x+busy.tl.x) % 8;
newByte = y * newMaskBytesPerRow + x / 8;
newBit = 7 - x % 8;
if (mask.buf[oldByte] & (1 << oldBit))
newMask[newByte] |= (1 << newBit);
}
}
// Set the size and data to the new, cropped cursor.
setSize(busy.width(), busy.height());
hotspot = hotspot.subtract(busy.tl);
delete [] data;
delete [] mask.buf;
datasize = newDataLen;
data = newData;
mask.buf = newMask;
}
|
