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_move_image(struct image_ctx *img, int imgid, int x, int y)
  86 {
  87         unsigned char buf[4096];
  88
  89         slave_hide_image(img, imgid);
  90
  91         img->images[imgid].box.x = x;
  92         img->images[imgid].box.y = y;
  93         img->images[imgid].visible = 1;
  94
  95         snprintf(buf, sizeof(buf), "1;%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);
  96         safe_write(img->pipe_to[1], buf, strlen(buf));
  97 }
  98
  99 void
 100 slave_hide_image(struct image_ctx *img, int imgid)
 101 {
 102         unsigned char buf[4096];
 103
 104         img->images[imgid].visible = 0;
 105
 106         snprintf(buf, sizeof(buf), "6;%d;%d;%d;%d\n", img->images[imgid].box.x, img->images[imgid].box.y, img->images[imgid].box.width, img->images[imgid].box.height);
 107         safe_write(img->pipe_to[1], buf, strlen(buf));
 108 }
 109
 110 /* slave_hide_image_region is common in osdep/image.c */
 111
 112 void
 113 slave_sync_images(struct image_ctx *img)
 114 {
 115         /* XSync() */
 116         safe_write(img->pipe_to[1], "3;\n", 3);
 117         /* Return '\n' for synchronization */
 118         safe_write(img->pipe_to[1], "4;\n", 3);
 119         unsigned char nl;
 120         if (safe_read(img->pipe_from[0], &nl, 1) < 0) {
 121                 INTERNAL("Communication with w3mimgdisplay failed.");
 122         }
 123 }
 124
 125
 126 void
 127 image_size(unsigned char *file, int *w, int *h)
 128 {
 129         unsigned char pcmd[4096];
 130         FILE *p;
 131
 132         snprintf(pcmd, sizeof(pcmd), "%s -size %s", DEFAULT_IMGHELPER_CMD, file);
 133         p = popen(pcmd, "r");
 134         if (!p) return; // XXX
 135         fscanf(p, "%d %d", w, h);
 136         pclose(p);
 137 }
 138
 139 #endif