src/osdep/image.h

   1 /* Image drawing. These are the actual slave-side routines. */
   2
   3 #ifndef EL__OSDEP_IMAGE_H
   4 #define EL__OSDEP_IMAGE_H
   5
   6 /* These routines are not directly available from "normal" code. To request
   7  * image drawing, always use the terminal/image.h interface. */
   8
   9 #include "util/box.h"
  10
  11 /* This is the slave-side image rendering context. */
  12 struct image_ctx {
  13         /* Screen resolution in pixels. */
  14         int xres, yres;
  15
  16         /* Cached per-image information. */
  17         struct image_data {
  18                 /* Bounding box of the image. */
  19                 struct box box;
  20                 unsigned char *file;
  21                 int visible;
  22         } images[MAX_IMAGES];
  23
  24         /* Pipe to the image drawing helper. */
  25         int pipe_to[2];
  26         int pipe_from[2];
  27 };
  28
  29 extern struct image_ctx *init_images(); // NULL if N/A
  30 extern void done_images(struct image_ctx *img);
  31
  32 extern void slave_images_getres(struct image_ctx *img, int *xres, int *yres);
  33 extern void slave_render_image(struct image_ctx *img, int imgid, struct box *box, unsigned char *file);
  34 extern void slave_move_image(struct image_ctx *img, int imgid, int x, int y);
  35 extern void slave_hide_image(struct image_ctx *img, int imgid);
  36 extern void slave_hide_image_region(struct image_ctx *img, struct box *region);
  37 extern void slave_sync_images(struct image_ctx *img);
  38
  39 /* This function does not require the slave-specific context and it is
  40  * called directly from the master. */
  41 extern void image_size(unsigned char *file, int *w, int *h);
  42
  43 #endif