1 /**
2 * @example pnmshow.c
3 */
4 #include <stdio.h>
5 #include <rfb/rfb.h>
6 #include <rfb/keysym.h>
7
8 #ifndef HAVE_HANDLEKEY
HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)9 static void HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
10 {
11 if(down && (key==XK_Escape || key=='q' || key=='Q'))
12 rfbCloseClient(cl);
13 }
14 #endif
15
main(int argc,char ** argv)16 int main(int argc,char** argv)
17 {
18 FILE* in=stdin;
19 int i,j,k,l,width,height,paddedWidth;
20 char buffer[1024];
21 rfbScreenInfoPtr rfbScreen;
22 enum { BW, GRAY, TRUECOLOUR } picType=TRUECOLOUR;
23 int bytesPerPixel,bitsPerPixelInFile;
24
25 if(argc>1) {
26 in=fopen(argv[1],"rb");
27 if(!in) {
28 printf("Couldn't find file %s.\n",argv[1]);
29 exit(1);
30 }
31 }
32
33 fgets(buffer,1024,in);
34 if(!strncmp(buffer,"P6",2)) {
35 picType=TRUECOLOUR;
36 bytesPerPixel=4; bitsPerPixelInFile=3*8;
37 } else if(!strncmp(buffer,"P5",2)) {
38 picType=GRAY;
39 bytesPerPixel=1; bitsPerPixelInFile=1*8;
40 } else if(!strncmp(buffer,"P4",2)) {
41 picType=BW;
42 bytesPerPixel=1; bitsPerPixelInFile=1;
43 } else {
44 printf("Not a ppm.\n");
45 exit(2);
46 }
47
48 /* skip comments */
49 do {
50 fgets(buffer,1024,in);
51 } while(buffer[0]=='#');
52
53 /* get width & height */
54 sscanf(buffer,"%d %d",&width,&height);
55 rfbLog("Got width %d and height %d.\n",width,height);
56 if(picType!=BW)
57 fgets(buffer,1024,in);
58 else
59 width=1+((width-1)|7);
60
61 /* vncviewers have problems with widths which are no multiple of 4. */
62 paddedWidth = width;
63 if(width&3)
64 paddedWidth+=4-(width&3);
65
66 /* initialize data for vnc server */
67 rfbScreen = rfbGetScreen(&argc,argv,paddedWidth,height,8,(bitsPerPixelInFile+7)/8,bytesPerPixel);
68 if(!rfbScreen)
69 return 0;
70 if(argc>1)
71 rfbScreen->desktopName = argv[1];
72 else
73 rfbScreen->desktopName = "Picture";
74 rfbScreen->alwaysShared = TRUE;
75 rfbScreen->kbdAddEvent = HandleKey;
76
77 /* enable http */
78 rfbScreen->httpDir = "../webclients";
79
80 /* allocate picture and read it */
81 rfbScreen->frameBuffer = (char*)malloc(paddedWidth*bytesPerPixel*height);
82 fread(rfbScreen->frameBuffer,width*bitsPerPixelInFile/8,height,in);
83 fclose(in);
84
85 if(picType!=TRUECOLOUR) {
86 rfbScreen->serverFormat.trueColour=FALSE;
87 rfbScreen->colourMap.count=256;
88 rfbScreen->colourMap.is16=FALSE;
89 rfbScreen->colourMap.data.bytes=malloc(256*3);
90 for(i=0;i<256;i++)
91 memset(rfbScreen->colourMap.data.bytes+3*i,i,3);
92 }
93
94 switch(picType) {
95 case TRUECOLOUR:
96 /* correct the format to 4 bytes instead of 3 (and pad to paddedWidth) */
97 for(j=height-1;j>=0;j--) {
98 for(i=width-1;i>=0;i--)
99 for(k=2;k>=0;k--)
100 rfbScreen->frameBuffer[(j*paddedWidth+i)*4+k]=
101 rfbScreen->frameBuffer[(j*width+i)*3+k];
102 for(i=width*4;i<paddedWidth*4;i++)
103 rfbScreen->frameBuffer[j*paddedWidth*4+i]=0;
104 }
105 break;
106 case GRAY:
107 break;
108 case BW:
109 /* correct the format from 1 bit to 8 bits */
110 for(j=height-1;j>=0;j--)
111 for(i=width-1;i>=0;i-=8) {
112 l=(unsigned char)rfbScreen->frameBuffer[(j*width+i)/8];
113 for(k=7;k>=0;k--)
114 rfbScreen->frameBuffer[j*paddedWidth+i+7-k]=(l&(1<<k))?0:255;
115 }
116 break;
117 }
118
119 /* initialize server */
120 rfbInitServer(rfbScreen);
121
122 /* run event loop */
123 rfbRunEventLoop(rfbScreen,40000,FALSE);
124
125 return(0);
126 }
127