WpaDemo の変更点

追加された行はこの色です。
削除された行はこの色です。
WpaDemo は削除されています。
WpaDemo の差分を削除
CENTER:&size(32){&color(darkgreen){''Wireless Projector Adapter &br; Demonstration Software''};};
#br
CENTER:''&counter(all); - &counter(yesterday); - &counter(today); - &online;''
#br
----
#contents
----
-WpaDevel
----

デモ用ソフト開発メモとか。

***libjpegの使い方 [#k353bbea]
 #include <stdio.h>
 #include <stdlib.h>
 #include <jpeglib.h>
 
 int main(int argc, char *argv[]) {
   struct jpeg_decompress_struct cinfo;
   struct jpeg_error_mgr jerr;
   FILE *infile;
   FILE *outfile;
   char filename[BUFSIZ];
   int ***data;
   unsigned char *line_buf;
   int width, height, ncomp;
   int c, i, j;
 
   if (argc != 2) {
     printf("Usage: test infile\n");
     exit(1);
   }
   sprintf(filename, "%s", argv[1]);
 
   cinfo.err = jpeg_std_error(&jerr);
   jpeg_create_decompress(&cinfo);
 
   if ((infile = fopen(filename, "rb")) == NULL) {
     fprintf(stderr, "can't open %s\n", filename);
     exit(1);
   }
   jpeg_stdio_src(&cinfo, infile);
 
   jpeg_read_header(&cinfo, TRUE);
   
   jpeg_start_decompress(&cinfo); 
 
   width = cinfo.output_width;
   height = cinfo.output_height;
   ncomp = cinfo.out_color_components;
   printf("Width: %d\n", width);
   printf("Height: %d\n", height);
   printf("#comps: %d\n", ncomp);
 
   data = malloc(ncomp * sizeof(int **));
   for (c = 0; c < ncomp; ++c) {
     data[c] = malloc(height * sizeof(int *));
     for (j = 0; j < height; ++j)
       data[c][j] = malloc(width * sizeof(int));
   }
 
   line_buf = malloc(ncomp * width * sizeof(unsigned char));
   j = 0;
   while (jpeg_read_scanlines(&cinfo, &line_buf, 1)) {
    for (i = 0; i < width; ++i)
      for (c = 0; c < ncomp; ++c)
       data[c][j][i] = line_buf[ncomp * i + c];
    ++j;
   } 
 
   jpeg_finish_decompress(&cinfo);
   close(infile);
   jpeg_destroy_decompress(&cinfo);
 
   if ((outfile = fopen("hoge.ppm", "wb")) == NULL) {
     fprintf(stderr, "can't open %s\n", filename);
     exit(1);
   }
 
   fprintf(outfile, "P6\n# %s\n%d %d \n255\n", "ppm", width, height);
   for (j = 0; j < height; ++j)
     for (i = 0; i < width; ++i)
       for (c = 0; c < ncomp; ++c) 
	fputc(data[c][j][i], outfile);
   close(outfile); 
 }