pnmshow.c
3.21 KB
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
/**
* @example pnmshow.c
*/
#include <stdio.h>
#include <rfb/rfb.h>
#include <rfb/keysym.h>
#ifndef HAVE_HANDLEKEY
static void HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
{
if(down && (key==XK_Escape || key=='q' || key=='Q'))
rfbCloseClient(cl);
}
#endif
int main(int argc,char** argv)
{
FILE* in=stdin;
int i,j,k,l,width,height,paddedWidth;
char buffer[1024];
rfbScreenInfoPtr rfbScreen;
enum { BW, GRAY, TRUECOLOUR } picType=TRUECOLOUR;
int bytesPerPixel,bitsPerPixelInFile;
if(argc>1) {
in=fopen(argv[1],"rb");
if(!in) {
printf("Couldn't find file %s.\n",argv[1]);
exit(1);
}
}
fgets(buffer,1024,in);
if(!strncmp(buffer,"P6",2)) {
picType=TRUECOLOUR;
bytesPerPixel=4; bitsPerPixelInFile=3*8;
} else if(!strncmp(buffer,"P5",2)) {
picType=GRAY;
bytesPerPixel=1; bitsPerPixelInFile=1*8;
} else if(!strncmp(buffer,"P4",2)) {
picType=BW;
bytesPerPixel=1; bitsPerPixelInFile=1;
} else {
printf("Not a ppm.\n");
exit(2);
}
/* skip comments */
do {
fgets(buffer,1024,in);
} while(buffer[0]=='#');
/* get width & height */
sscanf(buffer,"%d %d",&width,&height);
rfbLog("Got width %d and height %d.\n",width,height);
if(picType!=BW)
fgets(buffer,1024,in);
else
width=1+((width-1)|7);
/* vncviewers have problems with widths which are no multiple of 4. */
paddedWidth = width;
if(width&3)
paddedWidth+=4-(width&3);
/* initialize data for vnc server */
rfbScreen = rfbGetScreen(&argc,argv,paddedWidth,height,8,(bitsPerPixelInFile+7)/8,bytesPerPixel);
if(!rfbScreen)
return 1;
if(argc>1)
rfbScreen->desktopName = argv[1];
else
rfbScreen->desktopName = "Picture";
rfbScreen->alwaysShared = TRUE;
rfbScreen->kbdAddEvent = HandleKey;
/* enable http */
rfbScreen->httpDir = "../webclients";
/* allocate picture and read it */
rfbScreen->frameBuffer = (char*)malloc(paddedWidth*bytesPerPixel*height);
if(!rfbScreen->frameBuffer)
exit(1);
fread(rfbScreen->frameBuffer,width*bitsPerPixelInFile/8,height,in);
fclose(in);
if(picType!=TRUECOLOUR) {
rfbScreen->serverFormat.trueColour=FALSE;
rfbScreen->colourMap.count=256;
rfbScreen->colourMap.is16=FALSE;
rfbScreen->colourMap.data.bytes=malloc(256*3);
if(!rfbScreen->colourMap.data.bytes)
exit(1);
for(i=0;i<256;i++)
memset(rfbScreen->colourMap.data.bytes+3*i,i,3);
}
switch(picType) {
case TRUECOLOUR:
/* correct the format to 4 bytes instead of 3 (and pad to paddedWidth) */
for(j=height-1;j>=0;j--) {
for(i=width-1;i>=0;i--)
for(k=2;k>=0;k--)
rfbScreen->frameBuffer[(j*paddedWidth+i)*4+k]=
rfbScreen->frameBuffer[(j*width+i)*3+k];
for(i=width*4;i<paddedWidth*4;i++)
rfbScreen->frameBuffer[j*paddedWidth*4+i]=0;
}
break;
case GRAY:
break;
case BW:
/* correct the format from 1 bit to 8 bits */
for(j=height-1;j>=0;j--)
for(i=width-1;i>=0;i-=8) {
l=(unsigned char)rfbScreen->frameBuffer[(j*width+i)/8];
for(k=7;k>=0;k--)
rfbScreen->frameBuffer[j*paddedWidth+i+7-k]=(l&(1<<k))?0:255;
}
break;
}
/* initialize server */
rfbInitServer(rfbScreen);
/* run event loop */
rfbRunEventLoop(rfbScreen,40000,FALSE);
return(0);
}