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 /* This is the slave-side image rendering context. */
  10 struct image_ctx {
  11         /* Screen resolution in pixels. */
  12         int xres, yres;
  13
  14         /* Cached per-image information. */
  15         struct image_data {
  16                 int x, y, w, h;
  17                 unsigned char *file;
  18                 int visible;
  19         } images[MAX_IMAGES];
  20
  21         /* Pipe to the image drawing helper. */
  22         int pipe_to[2];
  23         int pipe_from[2];
  24 };
  25
  26 extern struct image_ctx *init_images(); // NULL if N/A
  27 extern void done_images(struct image_ctx *img);
  28
  29 extern void slave_images_getres(struct image_ctx *img, int *xres, int *yres);
  30 extern void slave_render_image(struct image_ctx *img, int imgid, int x, int y, unsigned char *file, int w, int h);
  31 extern void slave_move_image(struct image_ctx *img, int imgid, int x, int y);
  32 extern void slave_hide_image(struct image_ctx *img, int imgid);
  33 extern void slave_hide_image_region(struct image_ctx *img, int x, int y, int w, int h);
  34 extern void slave_sync_images(struct image_ctx *img);
  35
  36 /* This function does not require the slave-specific context and it is
  37  * called directly from the master. */
  38 extern void image_size(unsigned char *file, int *w, int *h);
  39
  40 #endif