src/osdep/unix/image.c

   1 /* Image rendering. */
   2
   3 #ifdef HAVE_CONFIG_H
   4 #include "config.h"
   5 #endif
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10
  11 #include "elinks.h"
  12
  13 #include "osdep/image.h"
  14 #include "osdep/osdep.h"
  15 #include "util/error.h"
  16
  17 #ifdef CONFIG_OS_UNIX
  18
  19 void
  20 image_helper(struct image_ctx *img, int xfd)
  21 {
  22         close(0); close(1);
  23         dup2(img->pipe_to[0], 0); dup2(img->pipe_from[1], 1);
  24         close(img->pipe_to[0]); close(img->pipe_to[1]);
  25         close(img->pipe_from[0]); close(img->pipe_from[1]);
  26         execl(DEFAULT_IMGHELPER_CMD, DEFAULT_IMGHELPER_CMD, NULL);
  27 }
  28
  29 struct image_ctx *
  30 init_images(void)
  31 {
  32         struct image_ctx *img = calloc(1, sizeof(*img));
  33
  34         setenv("W3M_TTY", ttyname(0), 0);
  35
  36         c_pipe(img->pipe_to);
  37         c_pipe(img->pipe_from);
  38         close(start_thread((void (*)(void *, int)) image_helper, img, 0));
  39         close(img->pipe_to[0]);
  40         close(img->pipe_from[1]);
  41
  42         return img;
  43 }
  44
  45 void
  46 done_images(struct image_ctx *img)
  47 {
  48         safe_write(img->pipe_to[1], "2;\n", 3);
  49         close(img->pipe_to[1]);
  50         close(img->pipe_from[0]);
  51         free(img);
  52 }
  53
  54
  55 void
  56 slave_images_getres(struct image_ctx *img, int *xres, int *yres)
  57 {
  58         FILE *p;
  59
  60         p = popen(DEFAULT_IMGHELPER_CMD " -test", "r");
  61         if (!p) return; // XXX
  62         fscanf(p, "%d %d", &img->xres, &img->yres);
  63         pclose(p);
  64
  65         if (xres) *xres = img->xres;
  66         if (yres) *yres = img->yres;
  67 }
  68
  69 void
  70 slave_render_image(struct image_ctx *img, int imgid, struct box *box, unsigned char *file)
  71 {
  72         unsigned char buf[4096];
  73
  74         if (img->images[imgid].file)
  75                 free(img->images[imgid].file);
  76         img->images[imgid].file = strdup(file);
  77         copy_box(&img->images[imgid].box, box);
  78         img->images[imgid].visible = 1;
  79
  80         snprintf(buf, sizeof(buf), "0;%d;%d;%d;%d;%d;%d;%d;%d;%d;%s\n", imgid, img->images[imgid].box.x, img->images[imgid].box.y, img->images[imgid].box.width, img->images[imgid].box.height, 0, 0, 0, 0, img->images[imgid].file);
  81         safe_write(img->pipe_to[1], buf, strlen(buf));
  82 }
  83
  84 void
  85 slave_hide_image_region(struct image_ctx *img, struct box *region)
  86 {
  87         unsigned char buf[4096];
  88
  89         snprintf(buf, sizeof(buf), "6;%d;%d;%d;%d\n", region->x, region->y, region->width, region->height);
  90         safe_write(img->pipe_to[1], buf, strlen(buf));
  91 }
  92
  93 void
  94 slave_sync_images(struct image_ctx *img)
  95 {
  96         /* XSync() */
  97         safe_write(img->pipe_to[1], "3;\n", 3);
  98         /* Return '\n' for synchronization */
  99         safe_write(img->pipe_to[1], "4;\n", 3);
 100         unsigned char nl;
 101         if (safe_read(img->pipe_from[0], &nl, 1) < 0) {
 102                 INTERNAL("Communication with w3mimgdisplay failed.");
 103         }
 104 }
 105
 106
 107 void
 108 image_size(unsigned char *file, int *w, int *h)
 109 {
 110         unsigned char pcmd[4096];
 111         FILE *p;
 112
 113         snprintf(pcmd, sizeof(pcmd), "%s -size %s", DEFAULT_IMGHELPER_CMD, file);
 114         p = popen(pcmd, "r");
 115         if (!p) return; // XXX
 116         fscanf(p, "%d %d", w, h);
 117         pclose(p);
 118 }
 119
 120 #endif