As discussed a while ago, decoding GIF images is not considered a Unisys

rlerdorf · rlerdorf · commit 72d90fc41cd4 · 2002-10-06T06:03:17.000Z
LZW patent violation so we can distribute read-only GIF support with
our bundled GD2.  The patent also expires in 2003, which is quickly
approaching, so we can roll in write support soon unless things change.
diff --git a/NEWS b/NEWS
@@ -1,6 +1,7 @@
 PHP 4                                                                      NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ? ? ??? 2002, Version 4.3.0
+- Read-only GIF support for bundled GD2 library (Rasmus)
 - Make the glue argument to implode() optional, if it is not specified
   default to using "". (Sterling)
 - Fixed fields argument to contain correct info for xslt_set_error_handler.
diff --git a/ext/gd/config.m4 b/ext/gd/config.m4
@@ -243,7 +243,7 @@ if test "$PHP_GD" = "php"; then
         libgd/gd_io_file.c libgd/gd_ss.c libgd/gd_io_ss.c libgd/gd_png.c libgd/gd_jpeg.c \
 		libgd/gdxpm.c libgd/gdfontt.c libgd/gdfonts.c libgd/gdfontmb.c libgd/gdfontl.c \
 		libgd/gdfontg.c libgd/gdtables.c libgd/gdft.c libgd/gdcache.c libgd/gdkanji.c \
-		libgd/wbmp.c libgd/gd_wbmp.c libgd/gdhelpers.c libgd/gd_topal.c"
+		libgd/wbmp.c libgd/gd_wbmp.c libgd/gdhelpers.c libgd/gd_topal.c libgd/gd_gif_in.c"
 
 dnl check for fabsf and floorf which are available since C99
   AC_CHECK_FUNCS(fabsf floorf)
@@ -273,6 +273,7 @@ dnl These are always available with bundled library
   AC_DEFINE(HAVE_GD_GD2,              1, [ ])
   AC_DEFINE(HAVE_GD_PNG,              1, [ ])
   AC_DEFINE(HAVE_GD_BUNDLED,          1, [ ])
+  AC_DEFINE(HAVE_GD_GIF_READ,          1, [ ])
 
 dnl Make sure the libgd/ is first in the include path
   GDLIB_CFLAGS="-DHAVE_LIBPNG"
diff --git a/ext/gd/libgd/gd.h b/ext/gd/libgd/gd.h
@@ -376,6 +376,10 @@ void gdImageJpegCtx(gdImagePtr im, gdIOCtx *out, int quality);
 /* Best to free this memory with gdFree(), not free() */
 void *gdImageJpegPtr(gdImagePtr im, int *size, int quality);
 
+gdImagePtr gdImageCreateFromGif(FILE *fd);
+gdImagePtr gdImageCreateFromGifCtx(gdIOCtxPtr in);
+gdImagePtr gdImageCreateFromGifSource(gdSourcePtr in);
+
 /* A custom data sink. For backwards compatibility. Use
 	gdIOCtx instead. */
 /* The sink function must return -1 on error, otherwise the number
diff --git a/ext/gd/libgd/gd_gif_in.c b/ext/gd/libgd/gd_gif_in.c
