+ else
+ result = dflt;
+
+ return result;
+}
+
+
+\f
+/***********************************************************************
+ Image Cache
+ ***********************************************************************/
+
+static void cache_image P_ ((struct frame *f, struct image *img));
+
+
+/* Return a new, initialized image cache that is allocated from the
+ heap. Call free_image_cache to free an image cache. */
+
+struct image_cache *
+make_image_cache ()
+{
+ struct image_cache *c = (struct image_cache *) xmalloc (sizeof *c);
+ int size;
+
+ bzero (c, sizeof *c);
+ c->size = 50;
+ c->images = (struct image **) xmalloc (c->size * sizeof *c->images);
+ size = IMAGE_CACHE_BUCKETS_SIZE * sizeof *c->buckets;
+ c->buckets = (struct image **) xmalloc (size);
+ bzero (c->buckets, size);
+ return c;
+}
+
+
+/* Free image cache of frame F. Be aware that X frames share images
+ caches. */
+
+void
+free_image_cache (f)
+ struct frame *f;
+{
+ struct image_cache *c = FRAME_X_IMAGE_CACHE (f);
+ if (c)
+ {
+ int i;
+
+ /* Cache should not be referenced by any frame when freed. */
+ xassert (c->refcount == 0);
+
+ for (i = 0; i < c->used; ++i)
+ free_image (f, c->images[i]);
+ xfree (c->images);
+ xfree (c->buckets);
+ xfree (c);
+ FRAME_X_IMAGE_CACHE (f) = NULL;
+ }
+}
+
+
+/* Clear image cache of frame F. FORCE_P non-zero means free all
+ images. FORCE_P zero means clear only images that haven't been
+ displayed for some time. Should be called from time to time to
+ reduce the number of loaded images. If image-eviction-seconds is
+ non-nil, this frees images in the cache which weren't displayed for
+ at least that many seconds. */
+
+void
+clear_image_cache (f, force_p)
+ struct frame *f;
+ int force_p;
+{
+ struct image_cache *c = FRAME_X_IMAGE_CACHE (f);
+
+ if (c && INTEGERP (Vimage_cache_eviction_delay))
+ {
+ EMACS_TIME t;
+ unsigned long old;
+ int i, any_freed_p = 0;
+
+ EMACS_GET_TIME (t);
+ old = EMACS_SECS (t) - XFASTINT (Vimage_cache_eviction_delay);
+
+ for (i = 0; i < c->used; ++i)
+ {
+ struct image *img = c->images[i];
+ if (img != NULL
+ && (force_p
+ || (img->timestamp > old)))
+ {
+ free_image (f, img);
+ any_freed_p = 1;
+ }
+ }
+
+ /* We may be clearing the image cache because, for example,
+ Emacs was iconified for a longer period of time. In that
+ case, current matrices may still contain references to
+ images freed above. So, clear these matrices. */
+ if (any_freed_p)
+ {
+ clear_current_matrices (f);
+ ++windows_or_buffers_changed;
+ }
+ }
+}
+
+
+DEFUN ("clear-image-cache", Fclear_image_cache, Sclear_image_cache,
+ 0, 1, 0,
+ "Clear the image cache of FRAME.\n\
+FRAME nil or omitted means use the selected frame.\n\
+FRAME t means clear the image caches of all frames.")
+ (frame)
+ Lisp_Object frame;
+{
+ if (EQ (frame, Qt))
+ {
+ Lisp_Object tail;
+
+ FOR_EACH_FRAME (tail, frame)
+ if (FRAME_X_P (XFRAME (frame)))
+ clear_image_cache (XFRAME (frame), 1);
+ }
+ else
+ clear_image_cache (check_x_frame (frame), 1);
+
+ return Qnil;
+}
+
+
+/* Return the id of image with Lisp specification SPEC on frame F.
+ SPEC must be a valid Lisp image specification (see valid_image_p). */
+
+int
+lookup_image (f, spec)
+ struct frame *f;
+ Lisp_Object spec;
+{
+ struct image_cache *c = FRAME_X_IMAGE_CACHE (f);
+ struct image *img;
+ int i;
+ unsigned hash;
+ struct gcpro gcpro1;
+ EMACS_TIME now;
+
+ /* F must be a window-system frame, and SPEC must be a valid image
+ specification. */
+ xassert (FRAME_WINDOW_P (f));
+ xassert (valid_image_p (spec));
+
+ GCPRO1 (spec);
+
+ /* Look up SPEC in the hash table of the image cache. */
+ hash = sxhash (spec, 0);
+ i = hash % IMAGE_CACHE_BUCKETS_SIZE;
+
+ for (img = c->buckets[i]; img; img = img->next)
+ if (img->hash == hash && !NILP (Fequal (img->spec, spec)))
+ break;
+
+ /* If not found, create a new image and cache it. */
+ if (img == NULL)
+ {
+ img = make_image (spec, hash);
+ cache_image (f, img);
+ img->load_failed_p = img->type->load (f, img) == 0;
+ xassert (!interrupt_input_blocked);
+
+ /* If we can't load the image, and we don't have a width and
+ height, use some arbitrary width and height so that we can
+ draw a rectangle for it. */
+ if (img->load_failed_p)
+ {
+ Lisp_Object value;
+
+ value = image_spec_value (spec, QCwidth, NULL);
+ img->width = (INTEGERP (value)
+ ? XFASTINT (value) : DEFAULT_IMAGE_WIDTH);
+ value = image_spec_value (spec, QCheight, NULL);
+ img->height = (INTEGERP (value)
+ ? XFASTINT (value) : DEFAULT_IMAGE_HEIGHT);
+ }
+ else
+ {
+ /* Handle image type independent image attributes
+ `:ascent ASCENT', `:margin MARGIN', `:relief RELIEF'. */
+ Lisp_Object ascent, margin, relief, algorithm, heuristic_mask;
+ Lisp_Object file;
+
+ ascent = image_spec_value (spec, QCascent, NULL);
+ if (INTEGERP (ascent))
+ img->ascent = XFASTINT (ascent);
+ else if (EQ (ascent, Qcenter))
+ img->ascent = CENTERED_IMAGE_ASCENT;
+
+ margin = image_spec_value (spec, QCmargin, NULL);
+ if (INTEGERP (margin) && XINT (margin) >= 0)
+ img->margin = XFASTINT (margin);
+
+ relief = image_spec_value (spec, QCrelief, NULL);
+ if (INTEGERP (relief))
+ {
+ img->relief = XINT (relief);
+ img->margin += abs (img->relief);
+ }
+
+ /* Should we apply a Laplace edge-detection algorithm? */
+ algorithm = image_spec_value (spec, QCalgorithm, NULL);
+ if (img->pixmap && EQ (algorithm, Qlaplace))
+ x_laplace (f, img);
+
+ /* Should we built a mask heuristically? */
+ heuristic_mask = image_spec_value (spec, QCheuristic_mask, NULL);
+ if (img->pixmap && !img->mask && !NILP (heuristic_mask))
+ x_build_heuristic_mask (f, img, heuristic_mask);
+ }
+ }
+
+ /* We're using IMG, so set its timestamp to `now'. */
+ EMACS_GET_TIME (now);
+ img->timestamp = EMACS_SECS (now);
+
+ UNGCPRO;
+
+ /* Value is the image id. */
+ return img->id;
+}
+
+
+/* Cache image IMG in the image cache of frame F. */
+
+static void
+cache_image (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ struct image_cache *c = FRAME_X_IMAGE_CACHE (f);
+ int i;
+
+ /* Find a free slot in c->images. */
+ for (i = 0; i < c->used; ++i)
+ if (c->images[i] == NULL)
+ break;
+
+ /* If no free slot found, maybe enlarge c->images. */
+ if (i == c->used && c->used == c->size)
+ {
+ c->size *= 2;
+ c->images = (struct image **) xrealloc (c->images,
+ c->size * sizeof *c->images);
+ }
+
+ /* Add IMG to c->images, and assign IMG an id. */
+ c->images[i] = img;
+ img->id = i;
+ if (i == c->used)
+ ++c->used;
+
+ /* Add IMG to the cache's hash table. */
+ i = img->hash % IMAGE_CACHE_BUCKETS_SIZE;
+ img->next = c->buckets[i];
+ if (img->next)
+ img->next->prev = img;
+ img->prev = NULL;
+ c->buckets[i] = img;
+}
+
+
+/* Call FN on every image in the image cache of frame F. Used to mark
+ Lisp Objects in the image cache. */
+
+void
+forall_images_in_image_cache (f, fn)
+ struct frame *f;
+ void (*fn) P_ ((struct image *img));
+{
+ if (FRAME_LIVE_P (f) && FRAME_X_P (f))
+ {
+ struct image_cache *c = FRAME_X_IMAGE_CACHE (f);
+ if (c)
+ {
+ int i;
+ for (i = 0; i < c->used; ++i)
+ if (c->images[i])
+ fn (c->images[i]);
+ }
+ }
+}
+
+
+\f
+/***********************************************************************
+ X support code
+ ***********************************************************************/
+
+static int x_create_x_image_and_pixmap P_ ((struct frame *, int, int, int,
+ XImage **, Pixmap *));
+static void x_destroy_x_image P_ ((XImage *));
+static void x_put_x_image P_ ((struct frame *, XImage *, Pixmap, int, int));
+
+
+/* Create an XImage and a pixmap of size WIDTH x HEIGHT for use on
+ frame F. Set *XIMG and *PIXMAP to the XImage and Pixmap created.
+ Set (*XIMG)->data to a raster of WIDTH x HEIGHT pixels allocated
+ via xmalloc. Print error messages via image_error if an error
+ occurs. Value is non-zero if successful. */
+
+static int
+x_create_x_image_and_pixmap (f, width, height, depth, ximg, pixmap)
+ struct frame *f;
+ int width, height, depth;
+ XImage **ximg;
+ Pixmap *pixmap;
+{
+ Display *display = FRAME_X_DISPLAY (f);
+ Screen *screen = FRAME_X_SCREEN (f);
+ Window window = FRAME_X_WINDOW (f);
+
+ xassert (interrupt_input_blocked);
+
+ if (depth <= 0)
+ depth = DefaultDepthOfScreen (screen);
+ *ximg = XCreateImage (display, DefaultVisualOfScreen (screen),
+ depth, ZPixmap, 0, NULL, width, height,
+ depth > 16 ? 32 : depth > 8 ? 16 : 8, 0);
+ if (*ximg == NULL)
+ {
+ image_error ("Unable to allocate X image", Qnil, Qnil);
+ return 0;
+ }
+
+ /* Allocate image raster. */
+ (*ximg)->data = (char *) xmalloc ((*ximg)->bytes_per_line * height);
+
+ /* Allocate a pixmap of the same size. */
+ *pixmap = XCreatePixmap (display, window, width, height, depth);
+ if (*pixmap == 0)
+ {
+ x_destroy_x_image (*ximg);
+ *ximg = NULL;
+ image_error ("Unable to create X pixmap", Qnil, Qnil);
+ return 0;
+ }
+
+ return 1;
+}
+
+
+/* Destroy XImage XIMG. Free XIMG->data. */
+
+static void
+x_destroy_x_image (ximg)
+ XImage *ximg;
+{
+ xassert (interrupt_input_blocked);
+ if (ximg)
+ {
+ xfree (ximg->data);
+ ximg->data = NULL;
+ XDestroyImage (ximg);
+ }
+}
+
+
+/* Put XImage XIMG into pixmap PIXMAP on frame F. WIDTH and HEIGHT
+ are width and height of both the image and pixmap. */
+
+static void
+x_put_x_image (f, ximg, pixmap, width, height)
+ struct frame *f;
+ XImage *ximg;
+ Pixmap pixmap;
+{
+ GC gc;
+
+ xassert (interrupt_input_blocked);
+ gc = XCreateGC (FRAME_X_DISPLAY (f), pixmap, 0, NULL);
+ XPutImage (FRAME_X_DISPLAY (f), pixmap, gc, ximg, 0, 0, 0, 0, width, height);
+ XFreeGC (FRAME_X_DISPLAY (f), gc);
+}
+
+
+\f
+/***********************************************************************
+ File Handling
+ ***********************************************************************/
+
+static Lisp_Object x_find_image_file P_ ((Lisp_Object));
+static char *slurp_file P_ ((char *, int *));
+
+
+/* Find image file FILE. Look in data-directory, then
+ x-bitmap-file-path. Value is the full name of the file found, or
+ nil if not found. */
+
+static Lisp_Object
+x_find_image_file (file)
+ Lisp_Object file;
+{
+ Lisp_Object file_found, search_path;
+ struct gcpro gcpro1, gcpro2;
+ int fd;
+
+ file_found = Qnil;
+ search_path = Fcons (Vdata_directory, Vx_bitmap_file_path);
+ GCPRO2 (file_found, search_path);
+
+ /* Try to find FILE in data-directory, then x-bitmap-file-path. */
+ fd = openp (search_path, file, "", &file_found, 0);
+
+ if (fd < 0)
+ file_found = Qnil;
+ else
+ close (fd);
+
+ UNGCPRO;
+ return file_found;
+}
+
+
+/* Read FILE into memory. Value is a pointer to a buffer allocated
+ with xmalloc holding FILE's contents. Value is null if an error
+ occured. *SIZE is set to the size of the file. */
+
+static char *
+slurp_file (file, size)
+ char *file;
+ int *size;
+{
+ FILE *fp = NULL;
+ char *buf = NULL;
+ struct stat st;
+
+ if (stat (file, &st) == 0
+ && (fp = fopen (file, "r")) != NULL
+ && (buf = (char *) xmalloc (st.st_size),
+ fread (buf, 1, st.st_size, fp) == st.st_size))
+ {
+ *size = st.st_size;
+ fclose (fp);
+ }
+ else
+ {
+ if (fp)
+ fclose (fp);
+ if (buf)
+ {
+ xfree (buf);
+ buf = NULL;
+ }
+ }
+
+ return buf;
+}
+
+
+\f
+/***********************************************************************
+ XBM images
+ ***********************************************************************/
+
+static int xbm_scan P_ ((char **, char *, char *, int *));
+static int xbm_load P_ ((struct frame *f, struct image *img));
+static int xbm_load_image P_ ((struct frame *f, struct image *img,
+ char *, char *));
+static int xbm_image_p P_ ((Lisp_Object object));
+static int xbm_read_bitmap_data P_ ((char *, char *, int *, int *,
+ unsigned char **));
+static int xbm_file_p P_ ((Lisp_Object));
+
+
+/* Indices of image specification fields in xbm_format, below. */
+
+enum xbm_keyword_index
+{
+ XBM_TYPE,
+ XBM_FILE,
+ XBM_WIDTH,
+ XBM_HEIGHT,
+ XBM_DATA,
+ XBM_FOREGROUND,
+ XBM_BACKGROUND,
+ XBM_ASCENT,
+ XBM_MARGIN,
+ XBM_RELIEF,
+ XBM_ALGORITHM,
+ XBM_HEURISTIC_MASK,
+ XBM_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid XBM image specifications. */
+
+static struct image_keyword xbm_format[XBM_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":file", IMAGE_STRING_VALUE, 0},
+ {":width", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":height", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":data", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":foreground", IMAGE_STRING_VALUE, 0},
+ {":background", IMAGE_STRING_VALUE, 0},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}
+};
+
+/* Structure describing the image type XBM. */
+
+static struct image_type xbm_type =
+{
+ &Qxbm,
+ xbm_image_p,
+ xbm_load,
+ x_clear_image,
+ NULL
+};
+
+/* Tokens returned from xbm_scan. */
+
+enum xbm_token
+{
+ XBM_TK_IDENT = 256,
+ XBM_TK_NUMBER
+};
+
+
+/* Return non-zero if OBJECT is a valid XBM-type image specification.
+ A valid specification is a list starting with the symbol `image'
+ The rest of the list is a property list which must contain an
+ entry `:type xbm..
+
+ If the specification specifies a file to load, it must contain
+ an entry `:file FILENAME' where FILENAME is a string.
+
+ If the specification is for a bitmap loaded from memory it must
+ contain `:width WIDTH', `:height HEIGHT', and `:data DATA', where
+ WIDTH and HEIGHT are integers > 0. DATA may be:
+
+ 1. a string large enough to hold the bitmap data, i.e. it must
+ have a size >= (WIDTH + 7) / 8 * HEIGHT
+
+ 2. a bool-vector of size >= WIDTH * HEIGHT
+
+ 3. a vector of strings or bool-vectors, one for each line of the
+ bitmap.
+
+ 4. A string containing an in-memory XBM file. WIDTH and HEIGHT
+ may not be specified in this case because they are defined in the
+ XBM file.
+
+ Both the file and data forms may contain the additional entries
+ `:background COLOR' and `:foreground COLOR'. If not present,
+ foreground and background of the frame on which the image is
+ displayed is used. */
+
+static int
+xbm_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword kw[XBM_LAST];
+
+ bcopy (xbm_format, kw, sizeof kw);
+ if (!parse_image_spec (object, kw, XBM_LAST, Qxbm))
+ return 0;
+
+ xassert (EQ (kw[XBM_TYPE].value, Qxbm));
+
+ if (kw[XBM_FILE].count)
+ {
+ if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_DATA].count)
+ return 0;
+ }
+ else if (kw[XBM_DATA].count && xbm_file_p (kw[XBM_DATA].value))
+ {
+ /* In-memory XBM file. */
+ if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_FILE].count)
+ return 0;
+ }
+ else
+ {
+ Lisp_Object data;
+ int width, height;
+
+ /* Entries for `:width', `:height' and `:data' must be present. */
+ if (!kw[XBM_WIDTH].count
+ || !kw[XBM_HEIGHT].count
+ || !kw[XBM_DATA].count)
+ return 0;
+
+ data = kw[XBM_DATA].value;
+ width = XFASTINT (kw[XBM_WIDTH].value);
+ height = XFASTINT (kw[XBM_HEIGHT].value);
+
+ /* Check type of data, and width and height against contents of
+ data. */
+ if (VECTORP (data))
+ {
+ int i;
+
+ /* Number of elements of the vector must be >= height. */
+ if (XVECTOR (data)->size < height)
+ return 0;
+
+ /* Each string or bool-vector in data must be large enough
+ for one line of the image. */
+ for (i = 0; i < height; ++i)
+ {
+ Lisp_Object elt = XVECTOR (data)->contents[i];
+
+ if (STRINGP (elt))
+ {
+ if (XSTRING (elt)->size
+ < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR)
+ return 0;
+ }
+ else if (BOOL_VECTOR_P (elt))
+ {
+ if (XBOOL_VECTOR (elt)->size < width)
+ return 0;
+ }
+ else
+ return 0;
+ }
+ }
+ else if (STRINGP (data))
+ {
+ if (XSTRING (data)->size
+ < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR * height)
+ return 0;
+ }
+ else if (BOOL_VECTOR_P (data))
+ {
+ if (XBOOL_VECTOR (data)->size < width * height)
+ return 0;
+ }
+ else
+ return 0;
+ }
+
+ return 1;
+}
+
+
+/* Scan a bitmap file. FP is the stream to read from. Value is
+ either an enumerator from enum xbm_token, or a character for a
+ single-character token, or 0 at end of file. If scanning an
+ identifier, store the lexeme of the identifier in SVAL. If
+ scanning a number, store its value in *IVAL. */
+
+static int
+xbm_scan (s, end, sval, ival)
+ char **s, *end;
+ char *sval;
+ int *ival;
+{
+ int c;
+
+ /* Skip white space. */
+ while (*s < end && (c = *(*s)++, isspace (c)))
+ ;
+
+ if (*s >= end)
+ c = 0;
+ else if (isdigit (c))
+ {
+ int value = 0, digit;
+
+ if (c == '0' && *s < end)
+ {
+ c = *(*s)++;
+ if (c == 'x' || c == 'X')
+ {
+ while (*s < end)
+ {
+ c = *(*s)++;
+ if (isdigit (c))
+ digit = c - '0';
+ else if (c >= 'a' && c <= 'f')
+ digit = c - 'a' + 10;
+ else if (c >= 'A' && c <= 'F')
+ digit = c - 'A' + 10;
+ else
+ break;
+ value = 16 * value + digit;
+ }
+ }
+ else if (isdigit (c))
+ {
+ value = c - '0';
+ while (*s < end
+ && (c = *(*s)++, isdigit (c)))
+ value = 8 * value + c - '0';
+ }
+ }
+ else
+ {
+ value = c - '0';
+ while (*s < end
+ && (c = *(*s)++, isdigit (c)))
+ value = 10 * value + c - '0';
+ }
+
+ if (*s < end)
+ *s = *s - 1;
+ *ival = value;
+ c = XBM_TK_NUMBER;
+ }
+ else if (isalpha (c) || c == '_')
+ {
+ *sval++ = c;
+ while (*s < end
+ && (c = *(*s)++, (isalnum (c) || c == '_')))
+ *sval++ = c;
+ *sval = 0;
+ if (*s < end)
+ *s = *s - 1;
+ c = XBM_TK_IDENT;
+ }
+
+ return c;
+}
+
+
+/* Replacement for XReadBitmapFileData which isn't available under old
+ X versions. CONTENTS is a pointer to a buffer to parse; END is the
+ buffer's end. Set *WIDTH and *HEIGHT to the width and height of
+ the image. Return in *DATA the bitmap data allocated with xmalloc.
+ Value is non-zero if successful. DATA null means just test if
+ CONTENTS looks like an im-memory XBM file. */
+
+static int
+xbm_read_bitmap_data (contents, end, width, height, data)
+ char *contents, *end;
+ int *width, *height;
+ unsigned char **data;
+{
+ char *s = contents;
+ char buffer[BUFSIZ];
+ int padding_p = 0;
+ int v10 = 0;
+ int bytes_per_line, i, nbytes;
+ unsigned char *p;
+ int value;
+ int LA1;
+
+#define match() \
+ LA1 = xbm_scan (&s, end, buffer, &value)
+
+#define expect(TOKEN) \
+ if (LA1 != (TOKEN)) \
+ goto failure; \
+ else \
+ match ()
+
+#define expect_ident(IDENT) \
+ if (LA1 == XBM_TK_IDENT && strcmp (buffer, (IDENT)) == 0) \
+ match (); \
+ else \
+ goto failure
+
+ *width = *height = -1;
+ if (data)
+ *data = NULL;
+ LA1 = xbm_scan (&s, end, buffer, &value);
+
+ /* Parse defines for width, height and hot-spots. */
+ while (LA1 == '#')
+ {
+ match ();
+ expect_ident ("define");
+ expect (XBM_TK_IDENT);
+
+ if (LA1 == XBM_TK_NUMBER);
+ {
+ char *p = strrchr (buffer, '_');
+ p = p ? p + 1 : buffer;
+ if (strcmp (p, "width") == 0)
+ *width = value;
+ else if (strcmp (p, "height") == 0)
+ *height = value;
+ }
+ expect (XBM_TK_NUMBER);
+ }
+
+ if (*width < 0 || *height < 0)
+ goto failure;
+ else if (data == NULL)
+ goto success;
+
+ /* Parse bits. Must start with `static'. */
+ expect_ident ("static");
+ if (LA1 == XBM_TK_IDENT)
+ {
+ if (strcmp (buffer, "unsigned") == 0)
+ {
+ match ();
+ expect_ident ("char");
+ }
+ else if (strcmp (buffer, "short") == 0)
+ {
+ match ();
+ v10 = 1;
+ if (*width % 16 && *width % 16 < 9)
+ padding_p = 1;
+ }
+ else if (strcmp (buffer, "char") == 0)
+ match ();
+ else
+ goto failure;
+ }
+ else
+ goto failure;
+
+ expect (XBM_TK_IDENT);
+ expect ('[');
+ expect (']');
+ expect ('=');
+ expect ('{');
+
+ bytes_per_line = (*width + 7) / 8 + padding_p;
+ nbytes = bytes_per_line * *height;
+ p = *data = (char *) xmalloc (nbytes);
+
+ if (v10)
+ {
+ for (i = 0; i < nbytes; i += 2)
+ {
+ int val = value;
+ expect (XBM_TK_NUMBER);
+
+ *p++ = val;
+ if (!padding_p || ((i + 2) % bytes_per_line))
+ *p++ = value >> 8;
+
+ if (LA1 == ',' || LA1 == '}')
+ match ();
+ else
+ goto failure;
+ }
+ }
+ else
+ {
+ for (i = 0; i < nbytes; ++i)
+ {
+ int val = value;
+ expect (XBM_TK_NUMBER);
+
+ *p++ = val;
+
+ if (LA1 == ',' || LA1 == '}')
+ match ();
+ else
+ goto failure;
+ }
+ }
+
+ success:
+ return 1;
+
+ failure:
+
+ if (data && *data)
+ {
+ xfree (*data);
+ *data = NULL;
+ }
+ return 0;
+
+#undef match
+#undef expect
+#undef expect_ident
+}
+
+
+/* Load XBM image IMG which will be displayed on frame F from buffer
+ CONTENTS. END is the end of the buffer. Value is non-zero if
+ successful. */
+
+static int
+xbm_load_image (f, img, contents, end)
+ struct frame *f;
+ struct image *img;
+ char *contents, *end;
+{
+ int rc;
+ unsigned char *data;
+ int success_p = 0;
+
+ rc = xbm_read_bitmap_data (contents, end, &img->width, &img->height, &data);
+ if (rc)
+ {
+ int depth = DefaultDepthOfScreen (FRAME_X_SCREEN (f));
+ unsigned long foreground = FRAME_FOREGROUND_PIXEL (f);
+ unsigned long background = FRAME_BACKGROUND_PIXEL (f);
+ Lisp_Object value;
+
+ xassert (img->width > 0 && img->height > 0);
+
+ /* Get foreground and background colors, maybe allocate colors. */
+ value = image_spec_value (img->spec, QCforeground, NULL);
+ if (!NILP (value))
+ foreground = x_alloc_image_color (f, img, value, foreground);
+
+ value = image_spec_value (img->spec, QCbackground, NULL);
+ if (!NILP (value))
+ background = x_alloc_image_color (f, img, value, background);
+
+ BLOCK_INPUT;
+ img->pixmap
+ = XCreatePixmapFromBitmapData (FRAME_X_DISPLAY (f),
+ FRAME_X_WINDOW (f),
+ data,
+ img->width, img->height,
+ foreground, background,
+ depth);
+ xfree (data);
+
+ if (img->pixmap == 0)
+ {
+ x_clear_image (f, img);
+ image_error ("Unable to create X pixmap for `%s'", img->spec, Qnil);
+ }
+ else
+ success_p = 1;
+
+ UNBLOCK_INPUT;
+ }
+ else
+ image_error ("Error loading XBM image `%s'", img->spec, Qnil);
+
+ return success_p;
+}
+
+
+/* Value is non-zero if DATA looks like an in-memory XBM file. */
+
+static int
+xbm_file_p (data)
+ Lisp_Object data;
+{
+ int w, h;
+ return (STRINGP (data)
+ && xbm_read_bitmap_data (XSTRING (data)->data,
+ (XSTRING (data)->data
+ + STRING_BYTES (XSTRING (data))),
+ &w, &h, NULL));
+}
+
+
+/* Fill image IMG which is used on frame F with pixmap data. Value is
+ non-zero if successful. */
+
+static int
+xbm_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ int success_p = 0;
+ Lisp_Object file_name;
+
+ xassert (xbm_image_p (img->spec));
+
+ /* If IMG->spec specifies a file name, create a non-file spec from it. */
+ file_name = image_spec_value (img->spec, QCfile, NULL);
+ if (STRINGP (file_name))
+ {
+ Lisp_Object file;
+ char *contents;
+ int size;
+ struct gcpro gcpro1;
+
+ file = x_find_image_file (file_name);
+ GCPRO1 (file);
+ if (!STRINGP (file))
+ {
+ image_error ("Cannot find image file `%s'", file_name, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ contents = slurp_file (XSTRING (file)->data, &size);
+ if (contents == NULL)
+ {
+ image_error ("Error loading XBM image `%s'", img->spec, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ success_p = xbm_load_image (f, img, contents, contents + size);
+ UNGCPRO;
+ }
+ else
+ {
+ struct image_keyword fmt[XBM_LAST];
+ Lisp_Object data;
+ unsigned char *bitmap_data;
+ int depth;
+ unsigned long foreground = FRAME_FOREGROUND_PIXEL (f);
+ unsigned long background = FRAME_BACKGROUND_PIXEL (f);
+ char *bits;
+ int parsed_p, height, width;
+ int in_memory_file_p = 0;
+
+ /* See if data looks like an in-memory XBM file. */
+ data = image_spec_value (img->spec, QCdata, NULL);
+ in_memory_file_p = xbm_file_p (data);
+
+ /* Parse the image specification. */
+ bcopy (xbm_format, fmt, sizeof fmt);
+ parsed_p = parse_image_spec (img->spec, fmt, XBM_LAST, Qxbm);
+ xassert (parsed_p);
+
+ /* Get specified width, and height. */
+ if (!in_memory_file_p)
+ {
+ img->width = XFASTINT (fmt[XBM_WIDTH].value);
+ img->height = XFASTINT (fmt[XBM_HEIGHT].value);
+ xassert (img->width > 0 && img->height > 0);
+ }
+
+ BLOCK_INPUT;
+
+ /* Get foreground and background colors, maybe allocate colors. */
+ if (fmt[XBM_FOREGROUND].count)
+ foreground = x_alloc_image_color (f, img, fmt[XBM_FOREGROUND].value,
+ foreground);
+ if (fmt[XBM_BACKGROUND].count)
+ background = x_alloc_image_color (f, img, fmt[XBM_BACKGROUND].value,
+ background);
+
+ if (in_memory_file_p)
+ success_p = xbm_load_image (f, img, XSTRING (data)->data,
+ (XSTRING (data)->data
+ + STRING_BYTES (XSTRING (data))));
+ else
+ {
+ if (VECTORP (data))
+ {
+ int i;
+ char *p;
+ int nbytes = (img->width + BITS_PER_CHAR - 1) / BITS_PER_CHAR;
+
+ p = bits = (char *) alloca (nbytes * img->height);
+ for (i = 0; i < img->height; ++i, p += nbytes)
+ {
+ Lisp_Object line = XVECTOR (data)->contents[i];
+ if (STRINGP (line))
+ bcopy (XSTRING (line)->data, p, nbytes);
+ else
+ bcopy (XBOOL_VECTOR (line)->data, p, nbytes);
+ }
+ }
+ else if (STRINGP (data))
+ bits = XSTRING (data)->data;
+ else
+ bits = XBOOL_VECTOR (data)->data;
+
+ /* Create the pixmap. */
+ depth = DefaultDepthOfScreen (FRAME_X_SCREEN (f));
+ img->pixmap
+ = XCreatePixmapFromBitmapData (FRAME_X_DISPLAY (f),
+ FRAME_X_WINDOW (f),
+ bits,
+ img->width, img->height,
+ foreground, background,
+ depth);
+ if (img->pixmap)
+ success_p = 1;
+ else
+ {
+ image_error ("Unable to create pixmap for XBM image `%s'",
+ img->spec, Qnil);
+ x_clear_image (f, img);
+ }
+ }
+
+ UNBLOCK_INPUT;
+ }
+
+ return success_p;
+}
+
+
+\f
+/***********************************************************************
+ XPM images
+ ***********************************************************************/
+
+#if HAVE_XPM
+
+static int xpm_image_p P_ ((Lisp_Object object));
+static int xpm_load P_ ((struct frame *f, struct image *img));
+static int xpm_valid_color_symbols_p P_ ((Lisp_Object));
+
+#include "X11/xpm.h"
+
+/* The symbol `xpm' identifying XPM-format images. */
+
+Lisp_Object Qxpm;
+
+/* Indices of image specification fields in xpm_format, below. */
+
+enum xpm_keyword_index
+{
+ XPM_TYPE,
+ XPM_FILE,
+ XPM_DATA,
+ XPM_ASCENT,
+ XPM_MARGIN,
+ XPM_RELIEF,
+ XPM_ALGORITHM,
+ XPM_HEURISTIC_MASK,
+ XPM_COLOR_SYMBOLS,
+ XPM_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid XPM image specifications. */
+
+static struct image_keyword xpm_format[XPM_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":file", IMAGE_STRING_VALUE, 0},
+ {":data", IMAGE_STRING_VALUE, 0},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":color-symbols", IMAGE_DONT_CHECK_VALUE_TYPE, 0}
+};
+
+/* Structure describing the image type XBM. */
+
+static struct image_type xpm_type =
+{
+ &Qxpm,
+ xpm_image_p,
+ xpm_load,
+ x_clear_image,
+ NULL
+};
+
+
+/* Value is non-zero if COLOR_SYMBOLS is a valid color symbols list
+ for XPM images. Such a list must consist of conses whose car and
+ cdr are strings. */
+
+static int
+xpm_valid_color_symbols_p (color_symbols)
+ Lisp_Object color_symbols;
+{
+ while (CONSP (color_symbols))
+ {
+ Lisp_Object sym = XCAR (color_symbols);
+ if (!CONSP (sym)
+ || !STRINGP (XCAR (sym))
+ || !STRINGP (XCDR (sym)))
+ break;
+ color_symbols = XCDR (color_symbols);
+ }
+
+ return NILP (color_symbols);
+}
+
+
+/* Value is non-zero if OBJECT is a valid XPM image specification. */
+
+static int
+xpm_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword fmt[XPM_LAST];
+ bcopy (xpm_format, fmt, sizeof fmt);
+ return (parse_image_spec (object, fmt, XPM_LAST, Qxpm)
+ /* Either `:file' or `:data' must be present. */
+ && fmt[XPM_FILE].count + fmt[XPM_DATA].count == 1
+ /* Either no `:color-symbols' or it's a list of conses
+ whose car and cdr are strings. */
+ && (fmt[XPM_COLOR_SYMBOLS].count == 0
+ || xpm_valid_color_symbols_p (fmt[XPM_COLOR_SYMBOLS].value)));
+}
+
+
+/* Load image IMG which will be displayed on frame F. Value is
+ non-zero if successful. */
+
+static int
+xpm_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ int rc, i;
+ XpmAttributes attrs;
+ Lisp_Object specified_file, color_symbols;
+
+ /* Configure the XPM lib. Use the visual of frame F. Allocate
+ close colors. Return colors allocated. */
+ bzero (&attrs, sizeof attrs);
+ attrs.visual = FRAME_X_VISUAL (f);
+ attrs.colormap = FRAME_X_COLORMAP (f);
+ attrs.valuemask |= XpmVisual;
+ attrs.valuemask |= XpmColormap;
+ attrs.valuemask |= XpmReturnAllocPixels;
+#ifdef XpmAllocCloseColors
+ attrs.alloc_close_colors = 1;
+ attrs.valuemask |= XpmAllocCloseColors;
+#else
+ attrs.closeness = 600;
+ attrs.valuemask |= XpmCloseness;
+#endif
+
+ /* If image specification contains symbolic color definitions, add
+ these to `attrs'. */
+ color_symbols = image_spec_value (img->spec, QCcolor_symbols, NULL);
+ if (CONSP (color_symbols))
+ {
+ Lisp_Object tail;
+ XpmColorSymbol *xpm_syms;
+ int i, size;
+
+ attrs.valuemask |= XpmColorSymbols;
+
+ /* Count number of symbols. */
+ attrs.numsymbols = 0;
+ for (tail = color_symbols; CONSP (tail); tail = XCDR (tail))
+ ++attrs.numsymbols;
+
+ /* Allocate an XpmColorSymbol array. */
+ size = attrs.numsymbols * sizeof *xpm_syms;
+ xpm_syms = (XpmColorSymbol *) alloca (size);
+ bzero (xpm_syms, size);
+ attrs.colorsymbols = xpm_syms;
+
+ /* Fill the color symbol array. */
+ for (tail = color_symbols, i = 0;
+ CONSP (tail);
+ ++i, tail = XCDR (tail))
+ {
+ Lisp_Object name = XCAR (XCAR (tail));
+ Lisp_Object color = XCDR (XCAR (tail));
+ xpm_syms[i].name = (char *) alloca (XSTRING (name)->size + 1);
+ strcpy (xpm_syms[i].name, XSTRING (name)->data);
+ xpm_syms[i].value = (char *) alloca (XSTRING (color)->size + 1);
+ strcpy (xpm_syms[i].value, XSTRING (color)->data);
+ }
+ }
+
+ /* Create a pixmap for the image, either from a file, or from a
+ string buffer containing data in the same format as an XPM file. */
+ BLOCK_INPUT;
+ specified_file = image_spec_value (img->spec, QCfile, NULL);
+ if (STRINGP (specified_file))
+ {
+ Lisp_Object file = x_find_image_file (specified_file);
+ if (!STRINGP (file))
+ {
+ image_error ("Cannot find image file `%s'", specified_file, Qnil);
+ UNBLOCK_INPUT;
+ return 0;
+ }
+
+ rc = XpmReadFileToPixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ XSTRING (file)->data, &img->pixmap, &img->mask,
+ &attrs);
+ }
+ else
+ {
+ Lisp_Object buffer = image_spec_value (img->spec, QCdata, NULL);
+ rc = XpmCreatePixmapFromBuffer (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ XSTRING (buffer)->data,
+ &img->pixmap, &img->mask,
+ &attrs);
+ }
+ UNBLOCK_INPUT;
+
+ if (rc == XpmSuccess)
+ {
+ /* Remember allocated colors. */
+ img->ncolors = attrs.nalloc_pixels;
+ img->colors = (unsigned long *) xmalloc (img->ncolors
+ * sizeof *img->colors);
+ for (i = 0; i < attrs.nalloc_pixels; ++i)
+ {
+ img->colors[i] = attrs.alloc_pixels[i];
+#ifdef DEBUG_X_COLORS
+ register_color (img->colors[i]);
+#endif
+ }
+
+ img->width = attrs.width;
+ img->height = attrs.height;
+ xassert (img->width > 0 && img->height > 0);
+
+ /* The call to XpmFreeAttributes below frees attrs.alloc_pixels. */
+ BLOCK_INPUT;
+ XpmFreeAttributes (&attrs);
+ UNBLOCK_INPUT;
+ }
+ else
+ {
+ switch (rc)
+ {
+ case XpmOpenFailed:
+ image_error ("Error opening XPM file (%s)", img->spec, Qnil);
+ break;
+
+ case XpmFileInvalid:
+ image_error ("Invalid XPM file (%s)", img->spec, Qnil);
+ break;
+
+ case XpmNoMemory:
+ image_error ("Out of memory (%s)", img->spec, Qnil);
+ break;
+
+ case XpmColorFailed:
+ image_error ("Color allocation error (%s)", img->spec, Qnil);
+ break;
+
+ default:
+ image_error ("Unknown error (%s)", img->spec, Qnil);
+ break;
+ }
+ }
+
+ return rc == XpmSuccess;
+}
+
+#endif /* HAVE_XPM != 0 */
+
+\f
+/***********************************************************************
+ Color table
+ ***********************************************************************/
+
+/* An entry in the color table mapping an RGB color to a pixel color. */
+
+struct ct_color
+{
+ int r, g, b;
+ unsigned long pixel;
+
+ /* Next in color table collision list. */
+ struct ct_color *next;
+};
+
+/* The bucket vector size to use. Must be prime. */
+
+#define CT_SIZE 101
+
+/* Value is a hash of the RGB color given by R, G, and B. */
+
+#define CT_HASH_RGB(R, G, B) (((R) << 16) ^ ((G) << 8) ^ (B))
+
+/* The color hash table. */
+
+struct ct_color **ct_table;
+
+/* Number of entries in the color table. */
+
+int ct_colors_allocated;
+
+/* Function prototypes. */
+
+static void init_color_table P_ ((void));
+static void free_color_table P_ ((void));
+static unsigned long *colors_in_color_table P_ ((int *n));
+static unsigned long lookup_rgb_color P_ ((struct frame *f, int r, int g, int b));
+static unsigned long lookup_pixel_color P_ ((struct frame *f, unsigned long p));
+
+
+/* Initialize the color table. */
+
+static void
+init_color_table ()
+{
+ int size = CT_SIZE * sizeof (*ct_table);
+ ct_table = (struct ct_color **) xmalloc (size);
+ bzero (ct_table, size);
+ ct_colors_allocated = 0;
+}
+
+
+/* Free memory associated with the color table. */
+
+static void
+free_color_table ()
+{
+ int i;
+ struct ct_color *p, *next;
+
+ for (i = 0; i < CT_SIZE; ++i)
+ for (p = ct_table[i]; p; p = next)
+ {
+ next = p->next;
+ xfree (p);
+ }
+
+ xfree (ct_table);
+ ct_table = NULL;
+}
+
+
+/* Value is a pixel color for RGB color R, G, B on frame F. If an
+ entry for that color already is in the color table, return the
+ pixel color of that entry. Otherwise, allocate a new color for R,
+ G, B, and make an entry in the color table. */
+
+static unsigned long
+lookup_rgb_color (f, r, g, b)
+ struct frame *f;
+ int r, g, b;
+{
+ unsigned hash = CT_HASH_RGB (r, g, b);
+ int i = hash % CT_SIZE;
+ struct ct_color *p;
+
+ for (p = ct_table[i]; p; p = p->next)
+ if (p->r == r && p->g == g && p->b == b)
+ break;
+
+ if (p == NULL)
+ {
+ XColor color;
+ Colormap cmap;
+ int rc;
+
+ color.red = r;
+ color.green = g;
+ color.blue = b;
+
+ BLOCK_INPUT;
+ cmap = FRAME_X_COLORMAP (f);
+ rc = x_alloc_nearest_color (f, cmap, &color);
+ UNBLOCK_INPUT;
+
+ if (rc)
+ {
+ ++ct_colors_allocated;
+
+ p = (struct ct_color *) xmalloc (sizeof *p);
+ p->r = r;
+ p->g = g;
+ p->b = b;
+ p->pixel = color.pixel;
+ p->next = ct_table[i];
+ ct_table[i] = p;
+ }
+ else
+ return FRAME_FOREGROUND_PIXEL (f);
+ }
+
+ return p->pixel;
+}
+
+
+/* Look up pixel color PIXEL which is used on frame F in the color
+ table. If not already present, allocate it. Value is PIXEL. */
+
+static unsigned long
+lookup_pixel_color (f, pixel)
+ struct frame *f;
+ unsigned long pixel;
+{
+ int i = pixel % CT_SIZE;
+ struct ct_color *p;
+
+ for (p = ct_table[i]; p; p = p->next)
+ if (p->pixel == pixel)
+ break;
+
+ if (p == NULL)
+ {
+ XColor color;
+ Colormap cmap;
+ int rc;
+
+ BLOCK_INPUT;
+
+ cmap = FRAME_X_COLORMAP (f);
+ color.pixel = pixel;
+ XQueryColor (FRAME_X_DISPLAY (f), cmap, &color);
+ rc = x_alloc_nearest_color (f, cmap, &color);
+ UNBLOCK_INPUT;
+
+ if (rc)
+ {
+ ++ct_colors_allocated;
+
+ p = (struct ct_color *) xmalloc (sizeof *p);
+ p->r = color.red;
+ p->g = color.green;
+ p->b = color.blue;
+ p->pixel = pixel;
+ p->next = ct_table[i];
+ ct_table[i] = p;
+ }
+ else
+ return FRAME_FOREGROUND_PIXEL (f);
+ }
+
+ return p->pixel;
+}
+
+
+/* Value is a vector of all pixel colors contained in the color table,
+ allocated via xmalloc. Set *N to the number of colors. */
+
+static unsigned long *
+colors_in_color_table (n)
+ int *n;
+{
+ int i, j;
+ struct ct_color *p;
+ unsigned long *colors;
+
+ if (ct_colors_allocated == 0)
+ {
+ *n = 0;
+ colors = NULL;
+ }
+ else
+ {
+ colors = (unsigned long *) xmalloc (ct_colors_allocated
+ * sizeof *colors);
+ *n = ct_colors_allocated;
+
+ for (i = j = 0; i < CT_SIZE; ++i)
+ for (p = ct_table[i]; p; p = p->next)
+ colors[j++] = p->pixel;
+ }
+
+ return colors;
+}
+
+
+\f
+/***********************************************************************
+ Algorithms
+ ***********************************************************************/
+
+static void x_laplace_write_row P_ ((struct frame *, long *,
+ int, XImage *, int));
+static void x_laplace_read_row P_ ((struct frame *, Colormap,
+ XColor *, int, XImage *, int));
+
+
+/* Fill COLORS with RGB colors from row Y of image XIMG. F is the
+ frame we operate on, CMAP is the color-map in effect, and WIDTH is
+ the width of one row in the image. */
+
+static void
+x_laplace_read_row (f, cmap, colors, width, ximg, y)
+ struct frame *f;
+ Colormap cmap;
+ XColor *colors;
+ int width;
+ XImage *ximg;
+ int y;
+{
+ int x;
+
+ for (x = 0; x < width; ++x)
+ colors[x].pixel = XGetPixel (ximg, x, y);
+
+ XQueryColors (FRAME_X_DISPLAY (f), cmap, colors, width);
+}
+
+
+/* Write row Y of image XIMG. PIXELS is an array of WIDTH longs
+ containing the pixel colors to write. F is the frame we are
+ working on. */
+
+static void
+x_laplace_write_row (f, pixels, width, ximg, y)
+ struct frame *f;
+ long *pixels;
+ int width;
+ XImage *ximg;
+ int y;
+{
+ int x;
+
+ for (x = 0; x < width; ++x)
+ XPutPixel (ximg, x, y, pixels[x]);
+}
+
+
+/* Transform image IMG which is used on frame F with a Laplace
+ edge-detection algorithm. The result is an image that can be used
+ to draw disabled buttons, for example. */
+
+static void
+x_laplace (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ Colormap cmap = FRAME_X_COLORMAP (f);
+ XImage *ximg, *oimg;
+ XColor *in[3];
+ long *out;
+ Pixmap pixmap;
+ int x, y, i;
+ long pixel;
+ int in_y, out_y, rc;
+ int mv2 = 45000;
+
+ BLOCK_INPUT;
+
+ /* Get the X image IMG->pixmap. */
+ ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap,
+ 0, 0, img->width, img->height, ~0, ZPixmap);
+
+ /* Allocate 3 input rows, and one output row of colors. */
+ for (i = 0; i < 3; ++i)
+ in[i] = (XColor *) alloca (img->width * sizeof (XColor));
+ out = (long *) alloca (img->width * sizeof (long));
+
+ /* Create an X image for output. */
+ rc = x_create_x_image_and_pixmap (f, img->width, img->height, 0,
+ &oimg, &pixmap);
+
+ /* Fill first two rows. */
+ x_laplace_read_row (f, cmap, in[0], img->width, ximg, 0);
+ x_laplace_read_row (f, cmap, in[1], img->width, ximg, 1);
+ in_y = 2;
+
+ /* Write first row, all zeros. */
+ init_color_table ();
+ pixel = lookup_rgb_color (f, 0, 0, 0);
+ for (x = 0; x < img->width; ++x)
+ out[x] = pixel;
+ x_laplace_write_row (f, out, img->width, oimg, 0);
+ out_y = 1;
+
+ for (y = 2; y < img->height; ++y)
+ {
+ int rowa = y % 3;
+ int rowb = (y + 2) % 3;
+
+ x_laplace_read_row (f, cmap, in[rowa], img->width, ximg, in_y++);
+
+ for (x = 0; x < img->width - 2; ++x)
+ {
+ int r = in[rowa][x].red + mv2 - in[rowb][x + 2].red;
+ int g = in[rowa][x].green + mv2 - in[rowb][x + 2].green;
+ int b = in[rowa][x].blue + mv2 - in[rowb][x + 2].blue;
+
+ out[x + 1] = lookup_rgb_color (f, r & 0xffff, g & 0xffff,
+ b & 0xffff);
+ }
+
+ x_laplace_write_row (f, out, img->width, oimg, out_y++);
+ }
+
+ /* Write last line, all zeros. */
+ for (x = 0; x < img->width; ++x)
+ out[x] = pixel;
+ x_laplace_write_row (f, out, img->width, oimg, out_y);
+
+ /* Free the input image, and free resources of IMG. */
+ XDestroyImage (ximg);
+ x_clear_image (f, img);
+
+ /* Put the output image into pixmap, and destroy it. */
+ x_put_x_image (f, oimg, pixmap, img->width, img->height);
+ x_destroy_x_image (oimg);
+
+ /* Remember new pixmap and colors in IMG. */
+ img->pixmap = pixmap;
+ img->colors = colors_in_color_table (&img->ncolors);
+ free_color_table ();
+
+ UNBLOCK_INPUT;
+}
+
+
+/* Build a mask for image IMG which is used on frame F. FILE is the
+ name of an image file, for error messages. HOW determines how to
+ determine the background color of IMG. If it is a list '(R G B)',
+ with R, G, and B being integers >= 0, take that as the color of the
+ background. Otherwise, determine the background color of IMG
+ heuristically. Value is non-zero if successful. */
+
+static int
+x_build_heuristic_mask (f, img, how)
+ struct frame *f;
+ struct image *img;
+ Lisp_Object how;
+{
+ Display *dpy = FRAME_X_DISPLAY (f);
+ XImage *ximg, *mask_img;
+ int x, y, rc, look_at_corners_p;
+ unsigned long bg;
+
+ BLOCK_INPUT;
+
+ /* Create an image and pixmap serving as mask. */
+ rc = x_create_x_image_and_pixmap (f, img->width, img->height, 1,
+ &mask_img, &img->mask);
+ if (!rc)
+ {
+ UNBLOCK_INPUT;
+ return 0;
+ }
+
+ /* Get the X image of IMG->pixmap. */
+ ximg = XGetImage (dpy, img->pixmap, 0, 0, img->width, img->height,
+ ~0, ZPixmap);
+
+ /* Determine the background color of ximg. If HOW is `(R G B)'
+ take that as color. Otherwise, try to determine the color
+ heuristically. */
+ look_at_corners_p = 1;
+
+ if (CONSP (how))
+ {
+ int rgb[3], i = 0;
+
+ while (i < 3
+ && CONSP (how)
+ && NATNUMP (XCAR (how)))
+ {
+ rgb[i] = XFASTINT (XCAR (how)) & 0xffff;
+ how = XCDR (how);
+ }
+
+ if (i == 3 && NILP (how))
+ {
+ char color_name[30];
+ XColor exact, color;
+ Colormap cmap;
+
+ sprintf (color_name, "#%04x%04x%04x", rgb[0], rgb[1], rgb[2]);
+
+ cmap = FRAME_X_COLORMAP (f);
+ if (XLookupColor (dpy, cmap, color_name, &exact, &color))
+ {
+ bg = color.pixel;
+ look_at_corners_p = 0;
+ }
+ }
+ }
+
+ if (look_at_corners_p)
+ {
+ unsigned long corners[4];
+ int i, best_count;
+
+ /* Get the colors at the corners of ximg. */
+ corners[0] = XGetPixel (ximg, 0, 0);
+ corners[1] = XGetPixel (ximg, img->width - 1, 0);
+ corners[2] = XGetPixel (ximg, img->width - 1, img->height - 1);
+ corners[3] = XGetPixel (ximg, 0, img->height - 1);
+
+ /* Choose the most frequently found color as background. */
+ for (i = best_count = 0; i < 4; ++i)
+ {
+ int j, n;
+
+ for (j = n = 0; j < 4; ++j)
+ if (corners[i] == corners[j])
+ ++n;
+
+ if (n > best_count)
+ bg = corners[i], best_count = n;
+ }
+ }
+
+ /* Set all bits in mask_img to 1 whose color in ximg is different
+ from the background color bg. */
+ for (y = 0; y < img->height; ++y)
+ for (x = 0; x < img->width; ++x)
+ XPutPixel (mask_img, x, y, XGetPixel (ximg, x, y) != bg);
+
+ /* Put mask_img into img->mask. */
+ x_put_x_image (f, mask_img, img->mask, img->width, img->height);
+ x_destroy_x_image (mask_img);
+ XDestroyImage (ximg);
+
+ UNBLOCK_INPUT;
+ return 1;
+}
+
+
+\f
+/***********************************************************************
+ PBM (mono, gray, color)
+ ***********************************************************************/
+
+static int pbm_image_p P_ ((Lisp_Object object));
+static int pbm_load P_ ((struct frame *f, struct image *img));
+static int pbm_scan_number P_ ((unsigned char **, unsigned char *));
+
+/* The symbol `pbm' identifying images of this type. */
+
+Lisp_Object Qpbm;
+
+/* Indices of image specification fields in gs_format, below. */
+
+enum pbm_keyword_index
+{
+ PBM_TYPE,
+ PBM_FILE,
+ PBM_DATA,
+ PBM_ASCENT,
+ PBM_MARGIN,
+ PBM_RELIEF,
+ PBM_ALGORITHM,
+ PBM_HEURISTIC_MASK,
+ PBM_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid user-defined image specifications. */
+
+static struct image_keyword pbm_format[PBM_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":file", IMAGE_STRING_VALUE, 0},
+ {":data", IMAGE_STRING_VALUE, 0},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}
+};
+
+/* Structure describing the image type `pbm'. */
+
+static struct image_type pbm_type =
+{
+ &Qpbm,
+ pbm_image_p,
+ pbm_load,
+ x_clear_image,
+ NULL
+};
+
+
+/* Return non-zero if OBJECT is a valid PBM image specification. */
+
+static int
+pbm_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword fmt[PBM_LAST];
+
+ bcopy (pbm_format, fmt, sizeof fmt);
+
+ if (!parse_image_spec (object, fmt, PBM_LAST, Qpbm))
+ return 0;
+
+ /* Must specify either :data or :file. */
+ return fmt[PBM_DATA].count + fmt[PBM_FILE].count == 1;
+}
+
+
+/* Scan a decimal number from *S and return it. Advance *S while
+ reading the number. END is the end of the string. Value is -1 at
+ end of input. */
+
+static int
+pbm_scan_number (s, end)
+ unsigned char **s, *end;
+{
+ int c, val = -1;
+
+ while (*s < end)
+ {
+ /* Skip white-space. */
+ while (*s < end && (c = *(*s)++, isspace (c)))
+ ;
+
+ if (c == '#')
+ {
+ /* Skip comment to end of line. */
+ while (*s < end && (c = *(*s)++, c != '\n'))
+ ;
+ }
+ else if (isdigit (c))
+ {
+ /* Read decimal number. */
+ val = c - '0';
+ while (*s < end && (c = *(*s)++, isdigit (c)))
+ val = 10 * val + c - '0';
+ break;
+ }
+ else
+ break;
+ }
+
+ return val;
+}
+
+
+/* Load PBM image IMG for use on frame F. */
+
+static int
+pbm_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ int raw_p, x, y;
+ int width, height, max_color_idx = 0;
+ XImage *ximg;
+ Lisp_Object file, specified_file;
+ enum {PBM_MONO, PBM_GRAY, PBM_COLOR} type;
+ struct gcpro gcpro1;
+ unsigned char *contents = NULL;
+ unsigned char *end, *p;
+ int size;
+
+ specified_file = image_spec_value (img->spec, QCfile, NULL);
+ file = Qnil;
+ GCPRO1 (file);
+
+ if (STRINGP (specified_file))
+ {
+ file = x_find_image_file (specified_file);
+ if (!STRINGP (file))
+ {
+ image_error ("Cannot find image file `%s'", specified_file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ contents = slurp_file (XSTRING (file)->data, &size);
+ if (contents == NULL)
+ {
+ image_error ("Error reading `%s'", file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ p = contents;
+ end = contents + size;
+ }
+ else
+ {
+ Lisp_Object data;
+ data = image_spec_value (img->spec, QCdata, NULL);
+ p = XSTRING (data)->data;
+ end = p + STRING_BYTES (XSTRING (data));
+ }
+
+ /* Check magic number. */
+ if (end - p < 2 || *p++ != 'P')
+ {
+ image_error ("Not a PBM image: `%s'", img->spec, Qnil);
+ error:
+ xfree (contents);
+ UNGCPRO;
+ return 0;
+ }
+
+ switch (*p++)
+ {
+ case '1':
+ raw_p = 0, type = PBM_MONO;
+ break;
+
+ case '2':
+ raw_p = 0, type = PBM_GRAY;
+ break;
+
+ case '3':
+ raw_p = 0, type = PBM_COLOR;
+ break;
+
+ case '4':
+ raw_p = 1, type = PBM_MONO;
+ break;
+
+ case '5':
+ raw_p = 1, type = PBM_GRAY;
+ break;
+
+ case '6':
+ raw_p = 1, type = PBM_COLOR;
+ break;
+
+ default:
+ image_error ("Not a PBM image: `%s'", img->spec, Qnil);
+ goto error;
+ }
+
+ /* Read width, height, maximum color-component. Characters
+ starting with `#' up to the end of a line are ignored. */
+ width = pbm_scan_number (&p, end);
+ height = pbm_scan_number (&p, end);
+
+ if (type != PBM_MONO)
+ {
+ max_color_idx = pbm_scan_number (&p, end);
+ if (raw_p && max_color_idx > 255)
+ max_color_idx = 255;
+ }
+
+ if (width < 0
+ || height < 0
+ || (type != PBM_MONO && max_color_idx < 0))
+ goto error;
+
+ BLOCK_INPUT;
+ if (!x_create_x_image_and_pixmap (f, width, height, 0,
+ &ximg, &img->pixmap))
+ {
+ UNBLOCK_INPUT;
+ goto error;
+ }
+
+ /* Initialize the color hash table. */
+ init_color_table ();
+
+ if (type == PBM_MONO)
+ {
+ int c = 0, g;
+
+ for (y = 0; y < height; ++y)
+ for (x = 0; x < width; ++x)
+ {
+ if (raw_p)
+ {
+ if ((x & 7) == 0)
+ c = *p++;
+ g = c & 0x80;
+ c <<= 1;
+ }
+ else
+ g = pbm_scan_number (&p, end);
+
+ XPutPixel (ximg, x, y, (g
+ ? FRAME_FOREGROUND_PIXEL (f)
+ : FRAME_BACKGROUND_PIXEL (f)));
+ }
+ }
+ else
+ {
+ for (y = 0; y < height; ++y)
+ for (x = 0; x < width; ++x)
+ {
+ int r, g, b;
+
+ if (type == PBM_GRAY)
+ r = g = b = raw_p ? *p++ : pbm_scan_number (&p, end);
+ else if (raw_p)
+ {
+ r = *p++;
+ g = *p++;
+ b = *p++;
+ }
+ else
+ {
+ r = pbm_scan_number (&p, end);
+ g = pbm_scan_number (&p, end);
+ b = pbm_scan_number (&p, end);
+ }
+
+ if (r < 0 || g < 0 || b < 0)
+ {
+ xfree (ximg->data);
+ ximg->data = NULL;
+ XDestroyImage (ximg);
+ UNBLOCK_INPUT;
+ image_error ("Invalid pixel value in image `%s'",
+ img->spec, Qnil);
+ goto error;
+ }
+
+ /* RGB values are now in the range 0..max_color_idx.
+ Scale this to the range 0..0xffff supported by X. */
+ r = (double) r * 65535 / max_color_idx;
+ g = (double) g * 65535 / max_color_idx;
+ b = (double) b * 65535 / max_color_idx;
+ XPutPixel (ximg, x, y, lookup_rgb_color (f, r, g, b));
+ }
+ }
+
+ /* Store in IMG->colors the colors allocated for the image, and
+ free the color table. */
+ img->colors = colors_in_color_table (&img->ncolors);
+ free_color_table ();
+
+ /* Put the image into a pixmap. */
+ x_put_x_image (f, ximg, img->pixmap, width, height);
+ x_destroy_x_image (ximg);
+ UNBLOCK_INPUT;
+
+ img->width = width;
+ img->height = height;
+
+ UNGCPRO;
+ xfree (contents);
+ return 1;
+}
+
+
+\f
+/***********************************************************************
+ PNG
+ ***********************************************************************/
+
+#if HAVE_PNG
+
+#include <png.h>
+
+/* Function prototypes. */
+
+static int png_image_p P_ ((Lisp_Object object));
+static int png_load P_ ((struct frame *f, struct image *img));
+
+/* The symbol `png' identifying images of this type. */
+
+Lisp_Object Qpng;
+
+/* Indices of image specification fields in png_format, below. */
+
+enum png_keyword_index
+{
+ PNG_TYPE,
+ PNG_DATA,
+ PNG_FILE,
+ PNG_ASCENT,
+ PNG_MARGIN,
+ PNG_RELIEF,
+ PNG_ALGORITHM,
+ PNG_HEURISTIC_MASK,
+ PNG_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid user-defined image specifications. */
+
+static struct image_keyword png_format[PNG_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":data", IMAGE_STRING_VALUE, 0},
+ {":file", IMAGE_STRING_VALUE, 0},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}
+};
+
+/* Structure describing the image type `png'. */
+
+static struct image_type png_type =
+{
+ &Qpng,
+ png_image_p,
+ png_load,
+ x_clear_image,
+ NULL
+};
+
+
+/* Return non-zero if OBJECT is a valid PNG image specification. */
+
+static int
+png_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword fmt[PNG_LAST];
+ bcopy (png_format, fmt, sizeof fmt);
+
+ if (!parse_image_spec (object, fmt, PNG_LAST, Qpng))
+ return 0;
+
+ /* Must specify either the :data or :file keyword. */
+ return fmt[PNG_FILE].count + fmt[PNG_DATA].count == 1;
+}
+
+
+/* Error and warning handlers installed when the PNG library
+ is initialized. */
+
+static void
+my_png_error (png_ptr, msg)
+ png_struct *png_ptr;
+ char *msg;
+{
+ xassert (png_ptr != NULL);
+ image_error ("PNG error: %s", build_string (msg), Qnil);
+ longjmp (png_ptr->jmpbuf, 1);
+}
+
+
+static void
+my_png_warning (png_ptr, msg)
+ png_struct *png_ptr;
+ char *msg;
+{
+ xassert (png_ptr != NULL);
+ image_error ("PNG warning: %s", build_string (msg), Qnil);
+}
+
+/* Memory source for PNG decoding. */
+
+struct png_memory_storage
+{
+ unsigned char *bytes; /* The data */
+ size_t len; /* How big is it? */
+ int index; /* Where are we? */
+};
+
+
+/* Function set as reader function when reading PNG image from memory.
+ PNG_PTR is a pointer to the PNG control structure. Copy LENGTH
+ bytes from the input to DATA. */
+
+static void
+png_read_from_memory (png_ptr, data, length)
+ png_structp png_ptr;
+ png_bytep data;
+ png_size_t length;
+{
+ struct png_memory_storage *tbr
+ = (struct png_memory_storage *) png_get_io_ptr (png_ptr);
+
+ if (length > tbr->len - tbr->index)
+ png_error (png_ptr, "Read error");
+
+ bcopy (tbr->bytes + tbr->index, data, length);
+ tbr->index = tbr->index + length;
+}
+
+/* Load PNG image IMG for use on frame F. Value is non-zero if
+ successful. */
+
+static int
+png_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ Lisp_Object file, specified_file;
+ Lisp_Object specified_data;
+ int x, y, i;
+ XImage *ximg, *mask_img = NULL;
+ struct gcpro gcpro1;
+ png_struct *png_ptr = NULL;
+ png_info *info_ptr = NULL, *end_info = NULL;
+ FILE *fp = NULL;
+ png_byte sig[8];
+ png_byte *pixels = NULL;
+ png_byte **rows = NULL;
+ png_uint_32 width, height;
+ int bit_depth, color_type, interlace_type;
+ png_byte channels;
+ png_uint_32 row_bytes;
+ int transparent_p;
+ char *gamma_str;
+ double screen_gamma, image_gamma;
+ int intent;
+ struct png_memory_storage tbr; /* Data to be read */
+
+ /* Find out what file to load. */
+ specified_file = image_spec_value (img->spec, QCfile, NULL);
+ specified_data = image_spec_value (img->spec, QCdata, NULL);
+ file = Qnil;
+ GCPRO1 (file);
+
+ if (NILP (specified_data))
+ {
+ file = x_find_image_file (specified_file);
+ if (!STRINGP (file))
+ {
+ image_error ("Cannot find image file `%s'", specified_file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Open the image file. */
+ fp = fopen (XSTRING (file)->data, "rb");
+ if (!fp)
+ {
+ image_error ("Cannot open image file `%s'", file, Qnil);
+ UNGCPRO;
+ fclose (fp);
+ return 0;
+ }
+
+ /* Check PNG signature. */
+ if (fread (sig, 1, sizeof sig, fp) != sizeof sig
+ || !png_check_sig (sig, sizeof sig))
+ {
+ image_error ("Not a PNG file: `%s'", file, Qnil);
+ UNGCPRO;
+ fclose (fp);
+ return 0;
+ }
+ }
+ else
+ {
+ /* Read from memory. */
+ tbr.bytes = XSTRING (specified_data)->data;
+ tbr.len = STRING_BYTES (XSTRING (specified_data));
+ tbr.index = 0;
+
+ /* Check PNG signature. */
+ if (tbr.len < sizeof sig
+ || !png_check_sig (tbr.bytes, sizeof sig))
+ {
+ image_error ("Not a PNG image: `%s'", img->spec, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Need to skip past the signature. */
+ tbr.bytes += sizeof (sig);
+ }
+
+ /* Initialize read and info structs for PNG lib. */
+ png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL,
+ my_png_error, my_png_warning);
+ if (!png_ptr)
+ {
+ if (fp) fclose (fp);
+ UNGCPRO;
+ return 0;
+ }
+
+ info_ptr = png_create_info_struct (png_ptr);
+ if (!info_ptr)
+ {
+ png_destroy_read_struct (&png_ptr, NULL, NULL);
+ if (fp) fclose (fp);
+ UNGCPRO;
+ return 0;
+ }
+
+ end_info = png_create_info_struct (png_ptr);
+ if (!end_info)
+ {
+ png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
+ if (fp) fclose (fp);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Set error jump-back. We come back here when the PNG library
+ detects an error. */
+ if (setjmp (png_ptr->jmpbuf))
+ {
+ error:
+ if (png_ptr)
+ png_destroy_read_struct (&png_ptr, &info_ptr, &end_info);
+ xfree (pixels);
+ xfree (rows);
+ if (fp) fclose (fp);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Read image info. */
+ if (!NILP (specified_data))
+ png_set_read_fn (png_ptr, (void *) &tbr, png_read_from_memory);
+ else
+ png_init_io (png_ptr, fp);
+
+ png_set_sig_bytes (png_ptr, sizeof sig);
+ png_read_info (png_ptr, info_ptr);
+ png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
+ &interlace_type, NULL, NULL);
+
+ /* If image contains simply transparency data, we prefer to
+ construct a clipping mask. */
+ if (png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS))
+ transparent_p = 1;
+ else
+ transparent_p = 0;
+
+ /* This function is easier to write if we only have to handle
+ one data format: RGB or RGBA with 8 bits per channel. Let's
+ transform other formats into that format. */
+
+ /* Strip more than 8 bits per channel. */
+ if (bit_depth == 16)
+ png_set_strip_16 (png_ptr);
+
+ /* Expand data to 24 bit RGB, or 8 bit grayscale, with alpha channel
+ if available. */
+ png_set_expand (png_ptr);
+
+ /* Convert grayscale images to RGB. */
+ if (color_type == PNG_COLOR_TYPE_GRAY
+ || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ png_set_gray_to_rgb (png_ptr);
+
+ /* The value 2.2 is a guess for PC monitors from PNG example.c. */
+ gamma_str = getenv ("SCREEN_GAMMA");
+ screen_gamma = gamma_str ? atof (gamma_str) : 2.2;
+
+ /* Tell the PNG lib to handle gamma correction for us. */
+
+#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED)
+ if (png_get_sRGB (png_ptr, info_ptr, &intent))
+ /* There is a special chunk in the image specifying the gamma. */
+ png_set_sRGB (png_ptr, info_ptr, intent);
+ else
+#endif
+ if (png_get_gAMA (png_ptr, info_ptr, &image_gamma))
+ /* Image contains gamma information. */
+ png_set_gamma (png_ptr, screen_gamma, image_gamma);
+ else
+ /* Use a default of 0.5 for the image gamma. */
+ png_set_gamma (png_ptr, screen_gamma, 0.5);
+
+ /* Handle alpha channel by combining the image with a background
+ color. Do this only if a real alpha channel is supplied. For
+ simple transparency, we prefer a clipping mask. */
+ if (!transparent_p)
+ {
+ png_color_16 *image_background;
+
+ if (png_get_bKGD (png_ptr, info_ptr, &image_background))
+ /* Image contains a background color with which to
+ combine the image. */
+ png_set_background (png_ptr, image_background,
+ PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
+ else
+ {
+ /* Image does not contain a background color with which
+ to combine the image data via an alpha channel. Use
+ the frame's background instead. */
+ XColor color;
+ Colormap cmap;
+ png_color_16 frame_background;
+
+ BLOCK_INPUT;
+ cmap = FRAME_X_COLORMAP (f);
+ color.pixel = FRAME_BACKGROUND_PIXEL (f);
+ XQueryColor (FRAME_X_DISPLAY (f), cmap, &color);
+ UNBLOCK_INPUT;
+
+ bzero (&frame_background, sizeof frame_background);
+ frame_background.red = color.red;
+ frame_background.green = color.green;
+ frame_background.blue = color.blue;
+
+ png_set_background (png_ptr, &frame_background,
+ PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
+ }
+ }
+
+ /* Update info structure. */
+ png_read_update_info (png_ptr, info_ptr);
+
+ /* Get number of channels. Valid values are 1 for grayscale images
+ and images with a palette, 2 for grayscale images with transparency
+ information (alpha channel), 3 for RGB images, and 4 for RGB
+ images with alpha channel, i.e. RGBA. If conversions above were
+ sufficient we should only have 3 or 4 channels here. */
+ channels = png_get_channels (png_ptr, info_ptr);
+ xassert (channels == 3 || channels == 4);
+
+ /* Number of bytes needed for one row of the image. */
+ row_bytes = png_get_rowbytes (png_ptr, info_ptr);
+
+ /* Allocate memory for the image. */
+ pixels = (png_byte *) xmalloc (row_bytes * height * sizeof *pixels);
+ rows = (png_byte **) xmalloc (height * sizeof *rows);
+ for (i = 0; i < height; ++i)
+ rows[i] = pixels + i * row_bytes;
+
+ /* Read the entire image. */
+ png_read_image (png_ptr, rows);
+ png_read_end (png_ptr, info_ptr);
+ if (fp)
+ {
+ fclose (fp);
+ fp = NULL;
+ }
+
+ BLOCK_INPUT;
+
+ /* Create the X image and pixmap. */
+ if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg,
+ &img->pixmap))
+ {
+ UNBLOCK_INPUT;
+ goto error;
+ }
+
+ /* Create an image and pixmap serving as mask if the PNG image
+ contains an alpha channel. */
+ if (channels == 4
+ && !transparent_p
+ && !x_create_x_image_and_pixmap (f, width, height, 1,
+ &mask_img, &img->mask))
+ {
+ x_destroy_x_image (ximg);
+ XFreePixmap (FRAME_X_DISPLAY (f), img->pixmap);
+ img->pixmap = 0;
+ UNBLOCK_INPUT;
+ goto error;
+ }
+
+ /* Fill the X image and mask from PNG data. */
+ init_color_table ();
+
+ for (y = 0; y < height; ++y)
+ {
+ png_byte *p = rows[y];
+
+ for (x = 0; x < width; ++x)
+ {
+ unsigned r, g, b;
+
+ r = *p++ << 8;
+ g = *p++ << 8;
+ b = *p++ << 8;
+ XPutPixel (ximg, x, y, lookup_rgb_color (f, r, g, b));
+
+ /* An alpha channel, aka mask channel, associates variable
+ transparency with an image. Where other image formats
+ support binary transparency---fully transparent or fully
+ opaque---PNG allows up to 254 levels of partial transparency.
+ The PNG library implements partial transparency by combining
+ the image with a specified background color.
+
+ I'm not sure how to handle this here nicely: because the
+ background on which the image is displayed may change, for
+ real alpha channel support, it would be necessary to create
+ a new image for each possible background.
+
+ What I'm doing now is that a mask is created if we have
+ boolean transparency information. Otherwise I'm using
+ the frame's background color to combine the image with. */
+
+ if (channels == 4)
+ {
+ if (mask_img)
+ XPutPixel (mask_img, x, y, *p > 0);
+ ++p;
+ }
+ }
+ }
+
+ /* Remember colors allocated for this image. */
+ img->colors = colors_in_color_table (&img->ncolors);
+ free_color_table ();
+
+ /* Clean up. */
+ png_destroy_read_struct (&png_ptr, &info_ptr, &end_info);
+ xfree (rows);
+ xfree (pixels);
+
+ img->width = width;
+ img->height = height;
+
+ /* Put the image into the pixmap, then free the X image and its buffer. */
+ x_put_x_image (f, ximg, img->pixmap, width, height);
+ x_destroy_x_image (ximg);
+
+ /* Same for the mask. */
+ if (mask_img)
+ {
+ x_put_x_image (f, mask_img, img->mask, img->width, img->height);
+ x_destroy_x_image (mask_img);
+ }
+
+ UNBLOCK_INPUT;
+ UNGCPRO;
+ return 1;
+}
+
+#endif /* HAVE_PNG != 0 */
+
+
+\f
+/***********************************************************************
+ JPEG
+ ***********************************************************************/
+
+#if HAVE_JPEG
+
+/* Work around a warning about HAVE_STDLIB_H being redefined in
+ jconfig.h. */
+#ifdef HAVE_STDLIB_H
+#define HAVE_STDLIB_H_1
+#undef HAVE_STDLIB_H
+#endif /* HAVE_STLIB_H */
+
+#include <jpeglib.h>
+#include <jerror.h>
+#include <setjmp.h>
+
+#ifdef HAVE_STLIB_H_1
+#define HAVE_STDLIB_H 1
+#endif
+
+static int jpeg_image_p P_ ((Lisp_Object object));
+static int jpeg_load P_ ((struct frame *f, struct image *img));
+
+/* The symbol `jpeg' identifying images of this type. */
+
+Lisp_Object Qjpeg;
+
+/* Indices of image specification fields in gs_format, below. */
+
+enum jpeg_keyword_index
+{
+ JPEG_TYPE,
+ JPEG_DATA,
+ JPEG_FILE,
+ JPEG_ASCENT,
+ JPEG_MARGIN,
+ JPEG_RELIEF,
+ JPEG_ALGORITHM,
+ JPEG_HEURISTIC_MASK,
+ JPEG_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid user-defined image specifications. */
+
+static struct image_keyword jpeg_format[JPEG_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":data", IMAGE_STRING_VALUE, 0},
+ {":file", IMAGE_STRING_VALUE, 0},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}
+};
+
+/* Structure describing the image type `jpeg'. */
+
+static struct image_type jpeg_type =
+{
+ &Qjpeg,
+ jpeg_image_p,
+ jpeg_load,
+ x_clear_image,
+ NULL
+};
+
+
+/* Return non-zero if OBJECT is a valid JPEG image specification. */
+
+static int
+jpeg_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword fmt[JPEG_LAST];
+
+ bcopy (jpeg_format, fmt, sizeof fmt);
+
+ if (!parse_image_spec (object, fmt, JPEG_LAST, Qjpeg))
+ return 0;
+
+ /* Must specify either the :data or :file keyword. */
+ return fmt[JPEG_FILE].count + fmt[JPEG_DATA].count == 1;
+}
+
+
+struct my_jpeg_error_mgr
+{
+ struct jpeg_error_mgr pub;
+ jmp_buf setjmp_buffer;
+};
+
+
+static void
+my_error_exit (cinfo)
+ j_common_ptr cinfo;
+{
+ struct my_jpeg_error_mgr *mgr = (struct my_jpeg_error_mgr *) cinfo->err;
+ longjmp (mgr->setjmp_buffer, 1);
+}
+
+
+/* Init source method for JPEG data source manager. Called by
+ jpeg_read_header() before any data is actually read. See
+ libjpeg.doc from the JPEG lib distribution. */
+
+static void
+our_init_source (cinfo)
+ j_decompress_ptr cinfo;
+{
+}
+
+
+/* Fill input buffer method for JPEG data source manager. Called
+ whenever more data is needed. We read the whole image in one step,
+ so this only adds a fake end of input marker at the end. */
+
+static boolean
+our_fill_input_buffer (cinfo)
+ j_decompress_ptr cinfo;
+{
+ /* Insert a fake EOI marker. */
+ struct jpeg_source_mgr *src = cinfo->src;
+ static JOCTET buffer[2];
+
+ buffer[0] = (JOCTET) 0xFF;
+ buffer[1] = (JOCTET) JPEG_EOI;
+
+ src->next_input_byte = buffer;
+ src->bytes_in_buffer = 2;
+ return TRUE;
+}
+
+
+/* Method to skip over NUM_BYTES bytes in the image data. CINFO->src
+ is the JPEG data source manager. */
+
+static void
+our_skip_input_data (cinfo, num_bytes)
+ j_decompress_ptr cinfo;
+ long num_bytes;
+{
+ struct jpeg_source_mgr *src = (struct jpeg_source_mgr *) cinfo->src;
+
+ if (src)
+ {
+ if (num_bytes > src->bytes_in_buffer)
+ ERREXIT (cinfo, JERR_INPUT_EOF);
+
+ src->bytes_in_buffer -= num_bytes;
+ src->next_input_byte += num_bytes;
+ }
+}
+
+
+/* Method to terminate data source. Called by
+ jpeg_finish_decompress() after all data has been processed. */
+
+static void
+our_term_source (cinfo)
+ j_decompress_ptr cinfo;
+{
+}
+
+
+/* Set up the JPEG lib for reading an image from DATA which contains
+ LEN bytes. CINFO is the decompression info structure created for
+ reading the image. */
+
+static void
+jpeg_memory_src (cinfo, data, len)
+ j_decompress_ptr cinfo;
+ JOCTET *data;
+ unsigned int len;
+{
+ struct jpeg_source_mgr *src;
+
+ if (cinfo->src == NULL)
+ {
+ /* First time for this JPEG object? */
+ cinfo->src = (struct jpeg_source_mgr *)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+ sizeof (struct jpeg_source_mgr));
+ src = (struct jpeg_source_mgr *) cinfo->src;
+ src->next_input_byte = data;
+ }
+
+ src = (struct jpeg_source_mgr *) cinfo->src;
+ src->init_source = our_init_source;
+ src->fill_input_buffer = our_fill_input_buffer;
+ src->skip_input_data = our_skip_input_data;
+ src->resync_to_restart = jpeg_resync_to_restart; /* Use default method. */
+ src->term_source = our_term_source;
+ src->bytes_in_buffer = len;
+ src->next_input_byte = data;
+}
+
+
+/* Load image IMG for use on frame F. Patterned after example.c
+ from the JPEG lib. */
+
+static int
+jpeg_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ struct jpeg_decompress_struct cinfo;
+ struct my_jpeg_error_mgr mgr;
+ Lisp_Object file, specified_file;
+ Lisp_Object specified_data;
+ FILE *fp = NULL;
+ JSAMPARRAY buffer;
+ int row_stride, x, y;
+ XImage *ximg = NULL;
+ int rc;
+ unsigned long *colors;
+ int width, height;
+ struct gcpro gcpro1;
+
+ /* Open the JPEG file. */
+ specified_file = image_spec_value (img->spec, QCfile, NULL);
+ specified_data = image_spec_value (img->spec, QCdata, NULL);
+ file = Qnil;
+ GCPRO1 (file);
+
+ if (NILP (specified_data))
+ {
+ file = x_find_image_file (specified_file);
+ if (!STRINGP (file))
+ {
+ image_error ("Cannot find image file `%s'", specified_file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ fp = fopen (XSTRING (file)->data, "r");
+ if (fp == NULL)
+ {
+ image_error ("Cannot open `%s'", file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+ }
+
+ /* Customize libjpeg's error handling to call my_error_exit when an
+ error is detected. This function will perform a longjmp. */
+ mgr.pub.error_exit = my_error_exit;
+ cinfo.err = jpeg_std_error (&mgr.pub);
+
+ if ((rc = setjmp (mgr.setjmp_buffer)) != 0)
+ {
+ if (rc == 1)
+ {
+ /* Called from my_error_exit. Display a JPEG error. */
+ char buffer[JMSG_LENGTH_MAX];
+ cinfo.err->format_message ((j_common_ptr) &cinfo, buffer);
+ image_error ("Error reading JPEG image `%s': %s", img->spec,
+ build_string (buffer));
+ }
+
+ /* Close the input file and destroy the JPEG object. */
+ if (fp)
+ fclose (fp);
+ jpeg_destroy_decompress (&cinfo);
+
+ BLOCK_INPUT;
+
+ /* If we already have an XImage, free that. */
+ x_destroy_x_image (ximg);
+
+ /* Free pixmap and colors. */
+ x_clear_image (f, img);
+
+ UNBLOCK_INPUT;
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Create the JPEG decompression object. Let it read from fp.
+ Read the JPEG image header. */
+ jpeg_create_decompress (&cinfo);
+
+ if (NILP (specified_data))
+ jpeg_stdio_src (&cinfo, fp);
+ else
+ jpeg_memory_src (&cinfo, XSTRING (specified_data)->data,
+ STRING_BYTES (XSTRING (specified_data)));
+
+ jpeg_read_header (&cinfo, TRUE);
+
+ /* Customize decompression so that color quantization will be used.
+ Start decompression. */
+ cinfo.quantize_colors = TRUE;
+ jpeg_start_decompress (&cinfo);
+ width = img->width = cinfo.output_width;
+ height = img->height = cinfo.output_height;
+
+ BLOCK_INPUT;
+
+ /* Create X image and pixmap. */
+ if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap))
+ {
+ UNBLOCK_INPUT;
+ longjmp (mgr.setjmp_buffer, 2);
+ }
+
+ /* Allocate colors. When color quantization is used,
+ cinfo.actual_number_of_colors has been set with the number of
+ colors generated, and cinfo.colormap is a two-dimensional array
+ of color indices in the range 0..cinfo.actual_number_of_colors.
+ No more than 255 colors will be generated. */
+ {
+ int i, ir, ig, ib;
+
+ if (cinfo.out_color_components > 2)
+ ir = 0, ig = 1, ib = 2;
+ else if (cinfo.out_color_components > 1)
+ ir = 0, ig = 1, ib = 0;
+ else
+ ir = 0, ig = 0, ib = 0;
+
+ /* Use the color table mechanism because it handles colors that
+ cannot be allocated nicely. Such colors will be replaced with
+ a default color, and we don't have to care about which colors
+ can be freed safely, and which can't. */
+ init_color_table ();
+ colors = (unsigned long *) alloca (cinfo.actual_number_of_colors
+ * sizeof *colors);
+
+ for (i = 0; i < cinfo.actual_number_of_colors; ++i)
+ {
+ /* Multiply RGB values with 255 because X expects RGB values
+ in the range 0..0xffff. */
+ int r = cinfo.colormap[ir][i] << 8;
+ int g = cinfo.colormap[ig][i] << 8;
+ int b = cinfo.colormap[ib][i] << 8;
+ colors[i] = lookup_rgb_color (f, r, g, b);
+ }
+
+ /* Remember those colors actually allocated. */
+ img->colors = colors_in_color_table (&img->ncolors);
+ free_color_table ();
+ }
+
+ /* Read pixels. */
+ row_stride = width * cinfo.output_components;
+ buffer = cinfo.mem->alloc_sarray ((j_common_ptr) &cinfo, JPOOL_IMAGE,
+ row_stride, 1);
+ for (y = 0; y < height; ++y)
+ {
+ jpeg_read_scanlines (&cinfo, buffer, 1);
+ for (x = 0; x < cinfo.output_width; ++x)
+ XPutPixel (ximg, x, y, colors[buffer[0][x]]);
+ }
+
+ /* Clean up. */
+ jpeg_finish_decompress (&cinfo);
+ jpeg_destroy_decompress (&cinfo);
+ if (fp)
+ fclose (fp);
+
+ /* Put the image into the pixmap. */
+ x_put_x_image (f, ximg, img->pixmap, width, height);
+ x_destroy_x_image (ximg);
+ UNBLOCK_INPUT;
+ UNGCPRO;
+ return 1;
+}
+
+#endif /* HAVE_JPEG */
+
+
+\f
+/***********************************************************************
+ TIFF
+ ***********************************************************************/
+
+#if HAVE_TIFF
+
+#include <tiffio.h>
+
+static int tiff_image_p P_ ((Lisp_Object object));
+static int tiff_load P_ ((struct frame *f, struct image *img));
+
+/* The symbol `tiff' identifying images of this type. */
+
+Lisp_Object Qtiff;
+
+/* Indices of image specification fields in tiff_format, below. */
+
+enum tiff_keyword_index
+{
+ TIFF_TYPE,
+ TIFF_DATA,
+ TIFF_FILE,
+ TIFF_ASCENT,
+ TIFF_MARGIN,
+ TIFF_RELIEF,
+ TIFF_ALGORITHM,
+ TIFF_HEURISTIC_MASK,
+ TIFF_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid user-defined image specifications. */
+
+static struct image_keyword tiff_format[TIFF_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":data", IMAGE_STRING_VALUE, 0},
+ {":file", IMAGE_STRING_VALUE, 0},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}
+};
+
+/* Structure describing the image type `tiff'. */
+
+static struct image_type tiff_type =
+{
+ &Qtiff,
+ tiff_image_p,
+ tiff_load,
+ x_clear_image,
+ NULL
+};
+
+
+/* Return non-zero if OBJECT is a valid TIFF image specification. */
+
+static int
+tiff_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword fmt[TIFF_LAST];
+ bcopy (tiff_format, fmt, sizeof fmt);
+
+ if (!parse_image_spec (object, fmt, TIFF_LAST, Qtiff))
+ return 0;
+
+ /* Must specify either the :data or :file keyword. */
+ return fmt[TIFF_FILE].count + fmt[TIFF_DATA].count == 1;
+}
+
+
+/* Reading from a memory buffer for TIFF images Based on the PNG
+ memory source, but we have to provide a lot of extra functions.
+ Blah.
+
+ We really only need to implement read and seek, but I am not
+ convinced that the TIFF library is smart enough not to destroy
+ itself if we only hand it the function pointers we need to
+ override. */
+
+typedef struct
+{
+ unsigned char *bytes;
+ size_t len;
+ int index;
+}
+tiff_memory_source;
+
+
+static size_t
+tiff_read_from_memory (data, buf, size)
+ thandle_t data;
+ tdata_t buf;
+ tsize_t size;
+{
+ tiff_memory_source *src = (tiff_memory_source *) data;
+
+ if (size > src->len - src->index)
+ return (size_t) -1;
+ bcopy (src->bytes + src->index, buf, size);
+ src->index += size;
+ return size;
+}
+
+
+static size_t
+tiff_write_from_memory (data, buf, size)
+ thandle_t data;
+ tdata_t buf;
+ tsize_t size;
+{
+ return (size_t) -1;
+}
+
+
+static toff_t
+tiff_seek_in_memory (data, off, whence)
+ thandle_t data;
+ toff_t off;
+ int whence;
+{
+ tiff_memory_source *src = (tiff_memory_source *) data;
+ int idx;
+
+ switch (whence)
+ {
+ case SEEK_SET: /* Go from beginning of source. */
+ idx = off;
+ break;
+
+ case SEEK_END: /* Go from end of source. */
+ idx = src->len + off;
+ break;
+
+ case SEEK_CUR: /* Go from current position. */
+ idx = src->index + off;
+ break;
+
+ default: /* Invalid `whence'. */
+ return -1;
+ }
+
+ if (idx > src->len || idx < 0)
+ return -1;
+
+ src->index = idx;
+ return src->index;
+}
+
+
+static int
+tiff_close_memory (data)
+ thandle_t data;
+{
+ /* NOOP */
+ return 0;
+}
+
+
+static int
+tiff_mmap_memory (data, pbase, psize)
+ thandle_t data;
+ tdata_t *pbase;
+ toff_t *psize;
+{
+ /* It is already _IN_ memory. */
+ return 0;
+}
+
+
+static void
+tiff_unmap_memory (data, base, size)
+ thandle_t data;
+ tdata_t base;
+ toff_t size;
+{
+ /* We don't need to do this. */
+}
+
+
+static toff_t
+tiff_size_of_memory (data)
+ thandle_t data;
+{
+ return ((tiff_memory_source *) data)->len;
+}
+
+
+/* Load TIFF image IMG for use on frame F. Value is non-zero if
+ successful. */
+
+static int
+tiff_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ Lisp_Object file, specified_file;
+ Lisp_Object specified_data;
+ TIFF *tiff;
+ int width, height, x, y;
+ uint32 *buf;
+ int rc;
+ XImage *ximg;
+ struct gcpro gcpro1;
+ tiff_memory_source memsrc;
+
+ specified_file = image_spec_value (img->spec, QCfile, NULL);
+ specified_data = image_spec_value (img->spec, QCdata, NULL);
+ file = Qnil;
+ GCPRO1 (file);
+
+ if (NILP (specified_data))
+ {
+ /* Read from a file */
+ file = x_find_image_file (specified_file);
+ if (!STRINGP (file))
+ {
+ image_error ("Cannot find image file `%s'", file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Try to open the image file. */
+ tiff = TIFFOpen (XSTRING (file)->data, "r");
+ if (tiff == NULL)
+ {
+ image_error ("Cannot open `%s'", file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+ }
+ else
+ {
+ /* Memory source! */
+ memsrc.bytes = XSTRING (specified_data)->data;
+ memsrc.len = STRING_BYTES (XSTRING (specified_data));
+ memsrc.index = 0;
+
+ tiff = TIFFClientOpen ("memory_source", "r", &memsrc,
+ (TIFFReadWriteProc) tiff_read_from_memory,
+ (TIFFReadWriteProc) tiff_write_from_memory,
+ tiff_seek_in_memory,
+ tiff_close_memory,
+ tiff_size_of_memory,
+ tiff_mmap_memory,
+ tiff_unmap_memory);
+
+ if (!tiff)
+ {
+ image_error ("Cannot open memory source for `%s'", img->spec, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+ }
+
+ /* Get width and height of the image, and allocate a raster buffer
+ of width x height 32-bit values. */
+ TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width);
+ TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height);
+ buf = (uint32 *) xmalloc (width * height * sizeof *buf);
+
+ rc = TIFFReadRGBAImage (tiff, width, height, buf, 0);
+ TIFFClose (tiff);
+ if (!rc)
+ {
+ image_error ("Error reading TIFF image `%s'", img->spec, Qnil);
+ xfree (buf);
+ UNGCPRO;
+ return 0;
+ }
+
+ BLOCK_INPUT;
+
+ /* Create the X image and pixmap. */
+ if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap))
+ {
+ UNBLOCK_INPUT;
+ xfree (buf);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Initialize the color table. */
+ init_color_table ();
+
+ /* Process the pixel raster. Origin is in the lower-left corner. */
+ for (y = 0; y < height; ++y)
+ {
+ uint32 *row = buf + y * width;
+
+ for (x = 0; x < width; ++x)
+ {
+ uint32 abgr = row[x];
+ int r = TIFFGetR (abgr) << 8;
+ int g = TIFFGetG (abgr) << 8;
+ int b = TIFFGetB (abgr) << 8;
+ XPutPixel (ximg, x, height - 1 - y, lookup_rgb_color (f, r, g, b));
+ }
+ }
+
+ /* Remember the colors allocated for the image. Free the color table. */
+ img->colors = colors_in_color_table (&img->ncolors);
+ free_color_table ();
+
+ /* Put the image into the pixmap, then free the X image and its buffer. */
+ x_put_x_image (f, ximg, img->pixmap, width, height);
+ x_destroy_x_image (ximg);
+ xfree (buf);
+ UNBLOCK_INPUT;
+
+ img->width = width;
+ img->height = height;
+
+ UNGCPRO;
+ return 1;
+}
+
+#endif /* HAVE_TIFF != 0 */
+
+
+\f
+/***********************************************************************
+ GIF
+ ***********************************************************************/
+
+#if HAVE_GIF
+
+#include <gif_lib.h>
+
+static int gif_image_p P_ ((Lisp_Object object));
+static int gif_load P_ ((struct frame *f, struct image *img));
+
+/* The symbol `gif' identifying images of this type. */
+
+Lisp_Object Qgif;
+
+/* Indices of image specification fields in gif_format, below. */
+
+enum gif_keyword_index
+{
+ GIF_TYPE,
+ GIF_DATA,
+ GIF_FILE,
+ GIF_ASCENT,
+ GIF_MARGIN,
+ GIF_RELIEF,
+ GIF_ALGORITHM,
+ GIF_HEURISTIC_MASK,
+ GIF_IMAGE,
+ GIF_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid user-defined image specifications. */
+
+static struct image_keyword gif_format[GIF_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":data", IMAGE_STRING_VALUE, 0},
+ {":file", IMAGE_STRING_VALUE, 0},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":image", IMAGE_NON_NEGATIVE_INTEGER_VALUE, 0}
+};
+
+/* Structure describing the image type `gif'. */
+
+static struct image_type gif_type =
+{
+ &Qgif,
+ gif_image_p,
+ gif_load,
+ x_clear_image,
+ NULL
+};
+
+
+/* Return non-zero if OBJECT is a valid GIF image specification. */
+
+static int
+gif_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword fmt[GIF_LAST];
+ bcopy (gif_format, fmt, sizeof fmt);
+
+ if (!parse_image_spec (object, fmt, GIF_LAST, Qgif))
+ return 0;
+
+ /* Must specify either the :data or :file keyword. */
+ return fmt[GIF_FILE].count + fmt[GIF_DATA].count == 1;
+}
+
+
+/* Reading a GIF image from memory
+ Based on the PNG memory stuff to a certain extent. */
+
+typedef struct
+{
+ unsigned char *bytes;
+ size_t len;
+ int index;
+}
+gif_memory_source;
+
+
+/* Make the current memory source available to gif_read_from_memory.
+ It's done this way because not all versions of libungif support
+ a UserData field in the GifFileType structure. */
+static gif_memory_source *current_gif_memory_src;
+
+static int
+gif_read_from_memory (file, buf, len)
+ GifFileType *file;
+ GifByteType *buf;
+ int len;
+{
+ gif_memory_source *src = current_gif_memory_src;
+
+ if (len > src->len - src->index)
+ return -1;
+
+ bcopy (src->bytes + src->index, buf, len);
+ src->index += len;
+ return len;
+}
+
+
+/* Load GIF image IMG for use on frame F. Value is non-zero if
+ successful. */
+
+static int
+gif_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ Lisp_Object file, specified_file;
+ Lisp_Object specified_data;
+ int rc, width, height, x, y, i;
+ XImage *ximg;
+ ColorMapObject *gif_color_map;
+ unsigned long pixel_colors[256];
+ GifFileType *gif;
+ struct gcpro gcpro1;
+ Lisp_Object image;
+ int ino, image_left, image_top, image_width, image_height;
+ gif_memory_source memsrc;
+ unsigned char *raster;
+
+ specified_file = image_spec_value (img->spec, QCfile, NULL);
+ specified_data = image_spec_value (img->spec, QCdata, NULL);
+ file = Qnil;
+ GCPRO1 (file);
+
+ if (NILP (specified_data))
+ {
+ file = x_find_image_file (specified_file);
+ if (!STRINGP (file))
+ {
+ image_error ("Cannot find image file `%s'", specified_file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Open the GIF file. */
+ gif = DGifOpenFileName (XSTRING (file)->data);
+ if (gif == NULL)
+ {
+ image_error ("Cannot open `%s'", file, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+ }
+ else
+ {
+ /* Read from memory! */
+ current_gif_memory_src = &memsrc;
+ memsrc.bytes = XSTRING (specified_data)->data;
+ memsrc.len = STRING_BYTES (XSTRING (specified_data));
+ memsrc.index = 0;
+
+ gif = DGifOpen(&memsrc, gif_read_from_memory);
+ if (!gif)
+ {
+ image_error ("Cannot open memory source `%s'", img->spec, Qnil);
+ UNGCPRO;
+ return 0;
+ }
+ }
+
+ /* Read entire contents. */
+ rc = DGifSlurp (gif);
+ if (rc == GIF_ERROR)
+ {
+ image_error ("Error reading `%s'", img->spec, Qnil);
+ DGifCloseFile (gif);
+ UNGCPRO;
+ return 0;
+ }
+
+ image = image_spec_value (img->spec, QCindex, NULL);
+ ino = INTEGERP (image) ? XFASTINT (image) : 0;
+ if (ino >= gif->ImageCount)
+ {
+ image_error ("Invalid image number `%s' in image `%s'",
+ image, img->spec);
+ DGifCloseFile (gif);
+ UNGCPRO;
+ return 0;
+ }
+
+ width = img->width = gif->SWidth;
+ height = img->height = gif->SHeight;
+
+ BLOCK_INPUT;
+
+ /* Create the X image and pixmap. */
+ if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap))
+ {
+ UNBLOCK_INPUT;
+ DGifCloseFile (gif);
+ UNGCPRO;
+ return 0;
+ }
+
+ /* Allocate colors. */
+ gif_color_map = gif->SavedImages[ino].ImageDesc.ColorMap;
+ if (!gif_color_map)
+ gif_color_map = gif->SColorMap;
+ init_color_table ();
+ bzero (pixel_colors, sizeof pixel_colors);
+
+ for (i = 0; i < gif_color_map->ColorCount; ++i)
+ {
+ int r = gif_color_map->Colors[i].Red << 8;
+ int g = gif_color_map->Colors[i].Green << 8;
+ int b = gif_color_map->Colors[i].Blue << 8;
+ pixel_colors[i] = lookup_rgb_color (f, r, g, b);
+ }
+
+ img->colors = colors_in_color_table (&img->ncolors);
+ free_color_table ();
+
+ /* Clear the part of the screen image that are not covered by
+ the image from the GIF file. Full animated GIF support
+ requires more than can be done here (see the gif89 spec,
+ disposal methods). Let's simply assume that the part
+ not covered by a sub-image is in the frame's background color. */
+ image_top = gif->SavedImages[ino].ImageDesc.Top;
+ image_left = gif->SavedImages[ino].ImageDesc.Left;
+ image_width = gif->SavedImages[ino].ImageDesc.Width;
+ image_height = gif->SavedImages[ino].ImageDesc.Height;
+
+ for (y = 0; y < image_top; ++y)
+ for (x = 0; x < width; ++x)
+ XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f));
+
+ for (y = image_top + image_height; y < height; ++y)
+ for (x = 0; x < width; ++x)
+ XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f));
+
+ for (y = image_top; y < image_top + image_height; ++y)
+ {
+ for (x = 0; x < image_left; ++x)
+ XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f));
+ for (x = image_left + image_width; x < width; ++x)
+ XPutPixel (ximg, x, y, FRAME_BACKGROUND_PIXEL (f));
+ }
+
+ /* Read the GIF image into the X image. We use a local variable
+ `raster' here because RasterBits below is a char *, and invites
+ problems with bytes >= 0x80. */
+ raster = (unsigned char *) gif->SavedImages[ino].RasterBits;
+
+ if (gif->SavedImages[ino].ImageDesc.Interlace)
+ {
+ static int interlace_start[] = {0, 4, 2, 1};
+ static int interlace_increment[] = {8, 8, 4, 2};
+ int pass, inc;
+ int row = interlace_start[0];
+
+ pass = 0;
+
+ for (y = 0; y < image_height; y++)
+ {
+ if (row >= image_height)
+ {
+ row = interlace_start[++pass];
+ while (row >= image_height)
+ row = interlace_start[++pass];
+ }
+
+ for (x = 0; x < image_width; x++)
+ {
+ int i = raster[(y * image_width) + x];
+ XPutPixel (ximg, x + image_left, row + image_top,
+ pixel_colors[i]);
+ }
+
+ row += interlace_increment[pass];
+ }
+ }
+ else
+ {
+ for (y = 0; y < image_height; ++y)
+ for (x = 0; x < image_width; ++x)
+ {
+ int i = raster[y * image_width + x];
+ XPutPixel (ximg, x + image_left, y + image_top, pixel_colors[i]);
+ }
+ }
+
+ DGifCloseFile (gif);
+
+ /* Put the image into the pixmap, then free the X image and its buffer. */
+ x_put_x_image (f, ximg, img->pixmap, width, height);
+ x_destroy_x_image (ximg);
+ UNBLOCK_INPUT;
+
+ UNGCPRO;
+ return 1;
+}
+
+#endif /* HAVE_GIF != 0 */
+
+
+\f
+/***********************************************************************
+ Ghostscript
+ ***********************************************************************/
+
+static int gs_image_p P_ ((Lisp_Object object));
+static int gs_load P_ ((struct frame *f, struct image *img));
+static void gs_clear_image P_ ((struct frame *f, struct image *img));
+
+/* The symbol `postscript' identifying images of this type. */
+
+Lisp_Object Qpostscript;
+
+/* Keyword symbols. */
+
+Lisp_Object QCloader, QCbounding_box, QCpt_width, QCpt_height;
+
+/* Indices of image specification fields in gs_format, below. */
+
+enum gs_keyword_index
+{
+ GS_TYPE,
+ GS_PT_WIDTH,
+ GS_PT_HEIGHT,
+ GS_FILE,
+ GS_LOADER,
+ GS_BOUNDING_BOX,
+ GS_ASCENT,
+ GS_MARGIN,
+ GS_RELIEF,
+ GS_ALGORITHM,
+ GS_HEURISTIC_MASK,
+ GS_LAST
+};
+
+/* Vector of image_keyword structures describing the format
+ of valid user-defined image specifications. */
+
+static struct image_keyword gs_format[GS_LAST] =
+{
+ {":type", IMAGE_SYMBOL_VALUE, 1},
+ {":pt-width", IMAGE_POSITIVE_INTEGER_VALUE, 1},
+ {":pt-height", IMAGE_POSITIVE_INTEGER_VALUE, 1},
+ {":file", IMAGE_STRING_VALUE, 1},
+ {":loader", IMAGE_FUNCTION_VALUE, 0},
+ {":bounding-box", IMAGE_DONT_CHECK_VALUE_TYPE, 1},
+ {":ascent", IMAGE_ASCENT_VALUE, 0},
+ {":margin", IMAGE_POSITIVE_INTEGER_VALUE, 0},
+ {":relief", IMAGE_INTEGER_VALUE, 0},
+ {":algorithm", IMAGE_DONT_CHECK_VALUE_TYPE, 0},
+ {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}
+};
+
+/* Structure describing the image type `ghostscript'. */
+
+static struct image_type gs_type =
+{
+ &Qpostscript,
+ gs_image_p,
+ gs_load,
+ gs_clear_image,
+ NULL
+};
+
+
+/* Free X resources of Ghostscript image IMG which is used on frame F. */
+
+static void
+gs_clear_image (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ /* IMG->data.ptr_val may contain a recorded colormap. */
+ xfree (img->data.ptr_val);
+ x_clear_image (f, img);
+}
+
+
+/* Return non-zero if OBJECT is a valid Ghostscript image
+ specification. */
+
+static int
+gs_image_p (object)
+ Lisp_Object object;
+{
+ struct image_keyword fmt[GS_LAST];
+ Lisp_Object tem;
+ int i;
+
+ bcopy (gs_format, fmt, sizeof fmt);
+
+ if (!parse_image_spec (object, fmt, GS_LAST, Qpostscript))
+ return 0;
+
+ /* Bounding box must be a list or vector containing 4 integers. */
+ tem = fmt[GS_BOUNDING_BOX].value;
+ if (CONSP (tem))
+ {
+ for (i = 0; i < 4; ++i, tem = XCDR (tem))
+ if (!CONSP (tem) || !INTEGERP (XCAR (tem)))
+ return 0;
+ if (!NILP (tem))
+ return 0;
+ }
+ else if (VECTORP (tem))
+ {
+ if (XVECTOR (tem)->size != 4)
+ return 0;
+ for (i = 0; i < 4; ++i)
+ if (!INTEGERP (XVECTOR (tem)->contents[i]))
+ return 0;
+ }
+ else
+ return 0;
+
+ return 1;
+}
+
+
+/* Load Ghostscript image IMG for use on frame F. Value is non-zero
+ if successful. */
+
+static int
+gs_load (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ char buffer[100];
+ Lisp_Object window_and_pixmap_id = Qnil, loader, pt_height, pt_width;
+ struct gcpro gcpro1, gcpro2;
+ Lisp_Object frame;
+ double in_width, in_height;
+ Lisp_Object pixel_colors = Qnil;
+
+ /* Compute pixel size of pixmap needed from the given size in the
+ image specification. Sizes in the specification are in pt. 1 pt
+ = 1/72 in, xdpi and ydpi are stored in the frame's X display
+ info. */
+ pt_width = image_spec_value (img->spec, QCpt_width, NULL);
+ in_width = XFASTINT (pt_width) / 72.0;
+ img->width = in_width * FRAME_X_DISPLAY_INFO (f)->resx;
+ pt_height = image_spec_value (img->spec, QCpt_height, NULL);
+ in_height = XFASTINT (pt_height) / 72.0;
+ img->height = in_height * FRAME_X_DISPLAY_INFO (f)->resy;
+
+ /* Create the pixmap. */
+ BLOCK_INPUT;
+ xassert (img->pixmap == 0);
+ img->pixmap = XCreatePixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ img->width, img->height,
+ DefaultDepthOfScreen (FRAME_X_SCREEN (f)));
+ UNBLOCK_INPUT;
+
+ if (!img->pixmap)
+ {
+ image_error ("Unable to create pixmap for `%s'", img->spec, Qnil);
+ return 0;
+ }
+
+ /* Call the loader to fill the pixmap. It returns a process object
+ if successful. We do not record_unwind_protect here because
+ other places in redisplay like calling window scroll functions
+ don't either. Let the Lisp loader use `unwind-protect' instead. */
+ GCPRO2 (window_and_pixmap_id, pixel_colors);
+
+ sprintf (buffer, "%lu %lu",
+ (unsigned long) FRAME_X_WINDOW (f),
+ (unsigned long) img->pixmap);
+ window_and_pixmap_id = build_string (buffer);
+
+ sprintf (buffer, "%lu %lu",
+ FRAME_FOREGROUND_PIXEL (f),
+ FRAME_BACKGROUND_PIXEL (f));
+ pixel_colors = build_string (buffer);
+
+ XSETFRAME (frame, f);
+ loader = image_spec_value (img->spec, QCloader, NULL);
+ if (NILP (loader))
+ loader = intern ("gs-load-image");
+
+ img->data.lisp_val = call6 (loader, frame, img->spec,
+ make_number (img->width),
+ make_number (img->height),
+ window_and_pixmap_id,
+ pixel_colors);
+ UNGCPRO;
+ return PROCESSP (img->data.lisp_val);
+}
+
+
+/* Kill the Ghostscript process that was started to fill PIXMAP on
+ frame F. Called from XTread_socket when receiving an event
+ telling Emacs that Ghostscript has finished drawing. */
+
+void
+x_kill_gs_process (pixmap, f)
+ Pixmap pixmap;
+ struct frame *f;
+{
+ struct image_cache *c = FRAME_X_IMAGE_CACHE (f);
+ int class, i;
+ struct image *img;
+
+ /* Find the image containing PIXMAP. */
+ for (i = 0; i < c->used; ++i)
+ if (c->images[i]->pixmap == pixmap)
+ break;
+
+ /* Kill the GS process. We should have found PIXMAP in the image
+ cache and its image should contain a process object. */
+ xassert (i < c->used);
+ img = c->images[i];
+ xassert (PROCESSP (img->data.lisp_val));
+ Fkill_process (img->data.lisp_val, Qnil);
+ img->data.lisp_val = Qnil;
+
+ /* On displays with a mutable colormap, figure out the colors
+ allocated for the image by looking at the pixels of an XImage for
+ img->pixmap. */
+ class = FRAME_X_VISUAL (f)->class;
+ if (class != StaticColor && class != StaticGray && class != TrueColor)
+ {
+ XImage *ximg;
+
+ BLOCK_INPUT;
+
+ /* Try to get an XImage for img->pixmep. */
+ ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap,
+ 0, 0, img->width, img->height, ~0, ZPixmap);
+ if (ximg)
+ {
+ int x, y;
+
+ /* Initialize the color table. */
+ init_color_table ();
+
+ /* For each pixel of the image, look its color up in the
+ color table. After having done so, the color table will
+ contain an entry for each color used by the image. */
+ for (y = 0; y < img->height; ++y)
+ for (x = 0; x < img->width; ++x)
+ {
+ unsigned long pixel = XGetPixel (ximg, x, y);
+ lookup_pixel_color (f, pixel);
+ }
+
+ /* Record colors in the image. Free color table and XImage. */
+ img->colors = colors_in_color_table (&img->ncolors);
+ free_color_table ();
+ XDestroyImage (ximg);
+
+#if 0 /* This doesn't seem to be the case. If we free the colors
+ here, we get a BadAccess later in x_clear_image when
+ freeing the colors. */
+ /* We have allocated colors once, but Ghostscript has also
+ allocated colors on behalf of us. So, to get the
+ reference counts right, free them once. */
+ if (img->ncolors)
+ x_free_colors (f, img->colors, img->ncolors);
+#endif
+ }
+ else
+ image_error ("Cannot get X image of `%s'; colors will not be freed",
+ img->spec, Qnil);
+
+ UNBLOCK_INPUT;
+ }
+}
+
+
+\f
+/***********************************************************************
+ Window properties
+ ***********************************************************************/
+
+DEFUN ("x-change-window-property", Fx_change_window_property,
+ Sx_change_window_property, 2, 3, 0,
+ "Change window property PROP to VALUE on the X window of FRAME.\n\
+PROP and VALUE must be strings. FRAME nil or omitted means use the\n\
+selected frame. Value is VALUE.")
+ (prop, value, frame)
+ Lisp_Object frame, prop, value;
+{
+ struct frame *f = check_x_frame (frame);
+ Atom prop_atom;
+
+ CHECK_STRING (prop, 1);
+ CHECK_STRING (value, 2);
+
+ BLOCK_INPUT;
+ prop_atom = XInternAtom (FRAME_X_DISPLAY (f), XSTRING (prop)->data, False);
+ XChangeProperty (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ prop_atom, XA_STRING, 8, PropModeReplace,
+ XSTRING (value)->data, XSTRING (value)->size);
+
+ /* Make sure the property is set when we return. */
+ XFlush (FRAME_X_DISPLAY (f));
+ UNBLOCK_INPUT;
+
+ return value;
+}
+
+
+DEFUN ("x-delete-window-property", Fx_delete_window_property,
+ Sx_delete_window_property, 1, 2, 0,
+ "Remove window property PROP from X window of FRAME.\n\
+FRAME nil or omitted means use the selected frame. Value is PROP.")
+ (prop, frame)
+ Lisp_Object prop, frame;
+{
+ struct frame *f = check_x_frame (frame);
+ Atom prop_atom;
+
+ CHECK_STRING (prop, 1);
+ BLOCK_INPUT;
+ prop_atom = XInternAtom (FRAME_X_DISPLAY (f), XSTRING (prop)->data, False);
+ XDeleteProperty (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), prop_atom);
+
+ /* Make sure the property is removed when we return. */
+ XFlush (FRAME_X_DISPLAY (f));
+ UNBLOCK_INPUT;
+
+ return prop;
+}
+
+
+DEFUN ("x-window-property", Fx_window_property, Sx_window_property,
+ 1, 2, 0,
+ "Value is the value of window property PROP on FRAME.\n\
+If FRAME is nil or omitted, use the selected frame. Value is nil\n\
+if FRAME hasn't a property with name PROP or if PROP has no string\n\
+value.")
+ (prop, frame)
+ Lisp_Object prop, frame;
+{
+ struct frame *f = check_x_frame (frame);
+ Atom prop_atom;
+ int rc;
+ Lisp_Object prop_value = Qnil;
+ char *tmp_data = NULL;
+ Atom actual_type;
+ int actual_format;
+ unsigned long actual_size, bytes_remaining;
+
+ CHECK_STRING (prop, 1);
+ BLOCK_INPUT;
+ prop_atom = XInternAtom (FRAME_X_DISPLAY (f), XSTRING (prop)->data, False);
+ rc = XGetWindowProperty (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ prop_atom, 0, 0, False, XA_STRING,
+ &actual_type, &actual_format, &actual_size,
+ &bytes_remaining, (unsigned char **) &tmp_data);
+ if (rc == Success)
+ {
+ int size = bytes_remaining;
+
+ XFree (tmp_data);
+ tmp_data = NULL;
+
+ rc = XGetWindowProperty (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ prop_atom, 0, bytes_remaining,
+ False, XA_STRING,
+ &actual_type, &actual_format,
+ &actual_size, &bytes_remaining,
+ (unsigned char **) &tmp_data);
+ if (rc == Success)
+ prop_value = make_string (tmp_data, size);
+
+ XFree (tmp_data);
+ }
+
+ UNBLOCK_INPUT;
+ return prop_value;
+}
+
+
+\f
+/***********************************************************************
+ Busy cursor
+ ***********************************************************************/
+
+/* If non-null, an asynchronous timer that, when it expires, displays
+ a busy cursor on all frames. */
+
+static struct atimer *busy_cursor_atimer;
+
+/* Non-zero means a busy cursor is currently shown. */
+
+static int busy_cursor_shown_p;
+
+/* Number of seconds to wait before displaying a busy cursor. */
+
+static Lisp_Object Vbusy_cursor_delay;
+
+/* Default number of seconds to wait before displaying a busy
+ cursor. */
+
+#define DEFAULT_BUSY_CURSOR_DELAY 1
+
+/* Function prototypes. */
+
+static void show_busy_cursor P_ ((struct atimer *));
+static void hide_busy_cursor P_ ((void));
+
+
+/* Cancel a currently active busy-cursor timer, and start a new one. */
+
+void
+start_busy_cursor ()
+{
+ EMACS_TIME delay;
+ int secs, usecs = 0;
+
+ cancel_busy_cursor ();
+
+ if (INTEGERP (Vbusy_cursor_delay)
+ && XINT (Vbusy_cursor_delay) > 0)
+ secs = XFASTINT (Vbusy_cursor_delay);
+ else if (FLOATP (Vbusy_cursor_delay)
+ && XFLOAT_DATA (Vbusy_cursor_delay) > 0)
+ {
+ Lisp_Object tem;
+ tem = Ftruncate (Vbusy_cursor_delay, Qnil);
+ secs = XFASTINT (tem);
+ usecs = (XFLOAT_DATA (Vbusy_cursor_delay) - secs) * 1000000;
+ }
+ else
+ secs = DEFAULT_BUSY_CURSOR_DELAY;
+
+ EMACS_SET_SECS_USECS (delay, secs, usecs);
+ busy_cursor_atimer = start_atimer (ATIMER_RELATIVE, delay,
+ show_busy_cursor, NULL);
+}
+
+
+/* Cancel the busy cursor timer if active, hide a busy cursor if
+ shown. */
+
+void
+cancel_busy_cursor ()
+{
+ if (busy_cursor_atimer)
+ {
+ cancel_atimer (busy_cursor_atimer);
+ busy_cursor_atimer = NULL;
+ }
+
+ if (busy_cursor_shown_p)
+ hide_busy_cursor ();
+}
+
+
+/* Timer function of busy_cursor_atimer. TIMER is equal to
+ busy_cursor_atimer.
+
+ Display a busy cursor on all frames by mapping the frames'
+ busy_window. Set the busy_p flag in the frames' output_data.x
+ structure to indicate that a busy cursor is shown on the
+ frames. */
+
+static void
+show_busy_cursor (timer)
+ struct atimer *timer;
+{
+ /* The timer implementation will cancel this timer automatically
+ after this function has run. Set busy_cursor_atimer to null
+ so that we know the timer doesn't have to be canceled. */
+ busy_cursor_atimer = NULL;
+
+ if (!busy_cursor_shown_p)
+ {
+ Lisp_Object rest, frame;
+
+ BLOCK_INPUT;
+
+ FOR_EACH_FRAME (rest, frame)
+ if (FRAME_X_P (XFRAME (frame)))
+ {
+ struct frame *f = XFRAME (frame);
+
+ f->output_data.x->busy_p = 1;
+
+ if (!f->output_data.x->busy_window)
+ {
+ unsigned long mask = CWCursor;
+ XSetWindowAttributes attrs;
+
+ attrs.cursor = f->output_data.x->busy_cursor;
+
+ f->output_data.x->busy_window
+ = XCreateWindow (FRAME_X_DISPLAY (f),
+ FRAME_OUTER_WINDOW (f),
+ 0, 0, 32000, 32000, 0, 0,
+ InputOnly,
+ CopyFromParent,
+ mask, &attrs);
+ }
+
+ XMapRaised (FRAME_X_DISPLAY (f), f->output_data.x->busy_window);
+ XFlush (FRAME_X_DISPLAY (f));
+ }
+
+ busy_cursor_shown_p = 1;
+ UNBLOCK_INPUT;
+ }
+}
+
+
+/* Hide the busy cursor on all frames, if it is currently shown. */
+
+static void
+hide_busy_cursor ()
+{
+ if (busy_cursor_shown_p)
+ {
+ Lisp_Object rest, frame;
+
+ BLOCK_INPUT;
+ FOR_EACH_FRAME (rest, frame)
+ {
+ struct frame *f = XFRAME (frame);
+
+ if (FRAME_X_P (f)
+ /* Watch out for newly created frames. */
+ && f->output_data.x->busy_window)
+ {
+ XUnmapWindow (FRAME_X_DISPLAY (f), f->output_data.x->busy_window);
+ /* Sync here because XTread_socket looks at the busy_p flag
+ that is reset to zero below. */
+ XSync (FRAME_X_DISPLAY (f), False);
+ f->output_data.x->busy_p = 0;
+ }
+ }
+
+ busy_cursor_shown_p = 0;
+ UNBLOCK_INPUT;
+ }
+}
+
+
+\f
+/***********************************************************************
+ Tool tips
+ ***********************************************************************/
+
+static Lisp_Object x_create_tip_frame P_ ((struct x_display_info *,
+ Lisp_Object));
+
+/* The frame of a currently visible tooltip, or null. */
+
+struct frame *tip_frame;
+
+/* If non-nil, a timer started that hides the last tooltip when it
+ fires. */
+
+Lisp_Object tip_timer;
+Window tip_window;
+
+/* Create a frame for a tooltip on the display described by DPYINFO.
+ PARMS is a list of frame parameters. Value is the frame. */
+
+static Lisp_Object
+x_create_tip_frame (dpyinfo, parms)
+ struct x_display_info *dpyinfo;
+ Lisp_Object parms;
+{
+ struct frame *f;
+ Lisp_Object frame, tem;
+ Lisp_Object name;
+ long window_prompting = 0;
+ int width, height;
+ int count = specpdl_ptr - specpdl;
+ struct gcpro gcpro1, gcpro2, gcpro3;
+ struct kboard *kb;
+
+ check_x ();
+
+ /* Use this general default value to start with until we know if
+ this frame has a specified name. */
+ Vx_resource_name = Vinvocation_name;
+
+#ifdef MULTI_KBOARD
+ kb = dpyinfo->kboard;
+#else
+ kb = &the_only_kboard;
+#endif
+
+ /* Get the name of the frame to use for resource lookup. */
+ name = x_get_arg (dpyinfo, parms, Qname, "name", "Name", RES_TYPE_STRING);
+ if (!STRINGP (name)
+ && !EQ (name, Qunbound)
+ && !NILP (name))
+ error ("Invalid frame name--not a string or nil");
+ Vx_resource_name = name;
+
+ frame = Qnil;
+ GCPRO3 (parms, name, frame);
+ tip_frame = f = make_frame (1);
+ XSETFRAME (frame, f);
+ FRAME_CAN_HAVE_SCROLL_BARS (f) = 0;
+
+ f->output_method = output_x_window;
+ f->output_data.x = (struct x_output *) xmalloc (sizeof (struct x_output));
+ bzero (f->output_data.x, sizeof (struct x_output));
+ f->output_data.x->icon_bitmap = -1;
+ f->output_data.x->fontset = -1;
+ f->icon_name = Qnil;
+ FRAME_X_DISPLAY_INFO (f) = dpyinfo;
+#ifdef MULTI_KBOARD
+ FRAME_KBOARD (f) = kb;
+#endif
+ f->output_data.x->parent_desc = FRAME_X_DISPLAY_INFO (f)->root_window;
+ f->output_data.x->explicit_parent = 0;
+
+ /* Set the name; the functions to which we pass f expect the name to
+ be set. */
+ if (EQ (name, Qunbound) || NILP (name))
+ {
+ f->name = build_string (dpyinfo->x_id_name);
+ f->explicit_name = 0;
+ }
+ else
+ {
+ f->name = name;
+ f->explicit_name = 1;
+ /* use the frame's title when getting resources for this frame. */
+ specbind (Qx_resource_name, name);
+ }
+
+ /* Extract the window parameters from the supplied values
+ that are needed to determine window geometry. */
+ {
+ Lisp_Object font;
+
+ font = x_get_arg (dpyinfo, parms, Qfont, "font", "Font", RES_TYPE_STRING);
+
+ BLOCK_INPUT;
+ /* First, try whatever font the caller has specified. */
+ if (STRINGP (font))
+ {
+ tem = Fquery_fontset (font, Qnil);
+ if (STRINGP (tem))
+ font = x_new_fontset (f, XSTRING (tem)->data);
+ else
+ font = x_new_font (f, XSTRING (font)->data);
+ }
+
+ /* Try out a font which we hope has bold and italic variations. */
+ if (!STRINGP (font))
+ font = x_new_font (f, "-adobe-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1");
+ if (!STRINGP (font))
+ font = x_new_font (f, "-misc-fixed-medium-r-normal-*-*-140-*-*-c-*-iso8859-1");
+ if (! STRINGP (font))
+ font = x_new_font (f, "-*-*-medium-r-normal-*-*-140-*-*-c-*-iso8859-1");
+ if (! STRINGP (font))
+ /* This was formerly the first thing tried, but it finds too many fonts
+ and takes too long. */
+ font = x_new_font (f, "-*-*-medium-r-*-*-*-*-*-*-c-*-iso8859-1");
+ /* If those didn't work, look for something which will at least work. */
+ if (! STRINGP (font))
+ font = x_new_font (f, "-*-fixed-*-*-*-*-*-140-*-*-c-*-iso8859-1");
+ UNBLOCK_INPUT;
+ if (! STRINGP (font))
+ font = build_string ("fixed");
+
+ x_default_parameter (f, parms, Qfont, font,
+ "font", "Font", RES_TYPE_STRING);
+ }
+
+ x_default_parameter (f, parms, Qborder_width, make_number (2),
+ "borderWidth", "BorderWidth", RES_TYPE_NUMBER);
+
+ /* This defaults to 2 in order to match xterm. We recognize either
+ internalBorderWidth or internalBorder (which is what xterm calls
+ it). */
+ if (NILP (Fassq (Qinternal_border_width, parms)))
+ {
+ Lisp_Object value;
+
+ value = x_get_arg (dpyinfo, parms, Qinternal_border_width,
+ "internalBorder", "internalBorder", RES_TYPE_NUMBER);
+ if (! EQ (value, Qunbound))
+ parms = Fcons (Fcons (Qinternal_border_width, value),
+ parms);
+ }
+
+ x_default_parameter (f, parms, Qinternal_border_width, make_number (1),
+ "internalBorderWidth", "internalBorderWidth",
+ RES_TYPE_NUMBER);
+
+ /* Also do the stuff which must be set before the window exists. */
+ x_default_parameter (f, parms, Qforeground_color, build_string ("black"),
+ "foreground", "Foreground", RES_TYPE_STRING);
+ x_default_parameter (f, parms, Qbackground_color, build_string ("white"),
+ "background", "Background", RES_TYPE_STRING);
+ x_default_parameter (f, parms, Qmouse_color, build_string ("black"),
+ "pointerColor", "Foreground", RES_TYPE_STRING);
+ x_default_parameter (f, parms, Qcursor_color, build_string ("black"),
+ "cursorColor", "Foreground", RES_TYPE_STRING);
+ x_default_parameter (f, parms, Qborder_color, build_string ("black"),
+ "borderColor", "BorderColor", RES_TYPE_STRING);
+
+ /* Init faces before x_default_parameter is called for scroll-bar
+ parameters because that function calls x_set_scroll_bar_width,
+ which calls change_frame_size, which calls Fset_window_buffer,
+ which runs hooks, which call Fvertical_motion. At the end, we
+ end up in init_iterator with a null face cache, which should not
+ happen. */
+ init_frame_faces (f);
+
+ f->output_data.x->parent_desc = FRAME_X_DISPLAY_INFO (f)->root_window;
+ window_prompting = x_figure_window_size (f, parms);
+
+ if (window_prompting & XNegative)
+ {
+ if (window_prompting & YNegative)
+ f->output_data.x->win_gravity = SouthEastGravity;
+ else
+ f->output_data.x->win_gravity = NorthEastGravity;
+ }
+ else
+ {
+ if (window_prompting & YNegative)
+ f->output_data.x->win_gravity = SouthWestGravity;
+ else
+ f->output_data.x->win_gravity = NorthWestGravity;
+ }
+
+ f->output_data.x->size_hint_flags = window_prompting;
+ {
+ XSetWindowAttributes attrs;
+ unsigned long mask;
+
+ BLOCK_INPUT;
+ mask = CWBackPixel | CWOverrideRedirect | CWSaveUnder | CWEventMask;
+ /* Window managers look at the override-redirect flag to determine
+ whether or net to give windows a decoration (Xlib spec, chapter
+ 3.2.8). */
+ attrs.override_redirect = True;
+ attrs.save_under = True;
+ attrs.background_pixel = FRAME_BACKGROUND_PIXEL (f);
+ /* Arrange for getting MapNotify and UnmapNotify events. */
+ attrs.event_mask = StructureNotifyMask;
+ tip_window
+ = FRAME_X_WINDOW (f)
+ = XCreateWindow (FRAME_X_DISPLAY (f),
+ FRAME_X_DISPLAY_INFO (f)->root_window,
+ /* x, y, width, height */
+ 0, 0, 1, 1,
+ /* Border. */
+ 1,
+ CopyFromParent, InputOutput, CopyFromParent,
+ mask, &attrs);
+ UNBLOCK_INPUT;
+ }
+
+ x_make_gc (f);
+
+ x_default_parameter (f, parms, Qauto_raise, Qnil,
+ "autoRaise", "AutoRaiseLower", RES_TYPE_BOOLEAN);
+ x_default_parameter (f, parms, Qauto_lower, Qnil,
+ "autoLower", "AutoRaiseLower", RES_TYPE_BOOLEAN);
+ x_default_parameter (f, parms, Qcursor_type, Qbox,
+ "cursorType", "CursorType", RES_TYPE_SYMBOL);
+
+ /* Dimensions, especially f->height, must be done via change_frame_size.
+ Change will not be effected unless different from the current
+ f->height. */
+ width = f->width;
+ height = f->height;
+ f->height = 0;
+ SET_FRAME_WIDTH (f, 0);
+ change_frame_size (f, height, width, 1, 0, 0);