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annotate fbt.c @ 4:5ff6a67e1421

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author Peter Meerwald <pmeerw@pmeerw.net>
date Mon, 09 May 2011 23:32:51 +0200
parents e8957085fe8a
children 66c77f9ba9b9
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1 #include <stdlib.h>
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2 #include <stdio.h>
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3 #include <fcntl.h>
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4 #include <unistd.h>
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5 #include <sys/ioctl.h>
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6
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7 #include "linux/fb.h"
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9 #include "common.h"
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10
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11 int main(int argc, char *argv[]) {
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13 if (argc != 2) {
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14 fprintf(stderr, "usage: fbt /dev/fbX\n");
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15 exit(EXIT_FAILURE);
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16 }
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17
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18 int fd = open(argv[1], O_RDWR);
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19 if (fd < 0) {
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20 perror("");
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21 exit(EXIT_FAILURE);
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22 }
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23
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24 struct fb_fix_screeninfo sif;
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25 if (ioctl(fd, FBIOGET_VSCREENINFO, &sif) < 0) {
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26 perror("");
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27 exit(EXIT_FAILURE);
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28 }
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29
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30 printf("id %s\n", sif.id);
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31 printf("type %d, aux %d\n", sif.type, sif.type_aux);
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32 printf("visual %d\n", sif.visual);
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33 printf("accel %d\n", sif.accel);
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34 printf("line length %d\n", sif.line_length);
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35
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36 struct fb_var_screeninfo siv;
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37 if (ioctl(fd, FBIOGET_VSCREENINFO, &siv) < 0) {
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38 perror("");
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39 exit(EXIT_FAILURE);
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40 }
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41
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42 printf("res x %d y %d\n", siv.xres, siv.yres);
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43 printf("bpp %d\n", siv.bits_per_pixel);
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45 printf("-------------\n");
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46 fflush(stdout);
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47
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48 jpg_buf_t jpg_buf = build_jpg_from_fb(fd, siv.xres, siv.yres);
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49
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50 close(fd);
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51
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52 printf("jpg %ld\n", jpg_buf.size);
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53
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54 FILE *f = fopen("test.jpg", "wb");
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55 if (!f) {
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56 fprintf(stderr, "fopen failed\n");
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57 exit(EXIT_FAILURE);
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58 }
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59
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60 fwrite(jpg_buf.ptr, 1, jpg_buf.size, f);
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61
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62 fclose(f);
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63
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64 free(jpg_buf.ptr);
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65
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66 exit(EXIT_SUCCESS);
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67 }

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