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Code Issues Releases Activity

Fix png support to allow compiling with libpng-1.5 (Bug#7908).

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* image.c (fn_png_longjmp, fn_png_set_longjmp_fn): New png
function definitions for compiling with libpng-1.5.
(PNG_LONGJMP, PNG_JMPBUF): New macros for libpng-1.5.
(my_png_error, png_load): Use them.  Suggested by Thomas Klausner.
This commit is contained in:
Chong Yidong 2011-01-29 16:28:26 -05:00
parent e935c6a287
commit 7f9c5df966
2 changed files with 40 additions and 2 deletions
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8
src/ChangeLog
View File

@ -1,3 +1,11 @@
2011-01-29 Chong Yidong <cyd@stupidchicken.com>
* image.c (fn_png_longjmp, fn_png_set_longjmp_fn): New png
function definitions for compiling with libpng-1.5.
(PNG_LONGJMP, PNG_JMPBUF): New macros for libpng-1.5.
(my_png_error, png_load): Use them. Suggested by Thomas Klausner
(Bug#7908).
2011-01-28 Chong Yidong <cyd@stupidchicken.com>
* m/intel386.h: Define NO_ARG_ARRAY. Suggested by Dan Nicolaescu.

34
src/image.c
View File

@ -5590,6 +5590,11 @@ DEF_IMGLIB_FN (png_read_image);
DEF_IMGLIB_FN (png_read_end);
DEF_IMGLIB_FN (png_error);
#if (PNG_LIBPNG_VER >= 10500)
DEF_IMGLIB_FN (png_longjmp);
DEF_IMGLIB_FN (png_set_longjmp_fn);
#endif /* libpng version >= 1.5 */
static int
init_png_functions (Lisp_Object libraries)
{
@ -5620,6 +5625,12 @@ init_png_functions (Lisp_Object libraries)
LOAD_IMGLIB_FN (library, png_read_image);
LOAD_IMGLIB_FN (library, png_read_end);
LOAD_IMGLIB_FN (library, png_error);
#if (PNG_LIBPNG_VER >= 10500)
LOAD_IMGLIB_FN (library, png_longjmp);
LOAD_IMGLIB_FN (library, png_set_longjmp_fn);
#endif /* libpng version >= 1.5 */
return 1;
}
#else
@ -5646,8 +5657,27 @@ init_png_functions (Lisp_Object libraries)
#define fn_png_read_end png_read_end
#define fn_png_error png_error
#if (PNG_LIBPNG_VER >= 10500)
#define fn_png_longjmp png_longjmp
#define fn_png_set_longjmp_fn png_set_longjmp_fn
#endif /* libpng version >= 1.5 */
#endif /* HAVE_NTGUI */
#if (PNG_LIBPNG_VER < 10500)
#define PNG_LONGJMP(ptr) (longjmp (ptr->jmpbuf, 1))
#define PNG_JMPBUF(ptr) ((ptr)->jmpbuf)
#else
/* In libpng version 1.5, the jmpbuf member is hidden.
We need the extra cast for PNG_JMPBUF because, for Windows,
DEF_IMGLIB_FN defines the return value of fn_png_set_longjmp_fn to
be int (Bug#7908). */
#define PNG_LONGJMP(ptr) (fn_png_longjmp (png_ptr, 1))
#define PNG_JMPBUF(ptr) \
(*(jmp_buf *)(fn_png_set_longjmp_fn((ptr), longjmp, sizeof (jmp_buf))))
#endif
/* Error and warning handlers installed when the PNG library
is initialized. */
@ -5660,7 +5690,7 @@ my_png_error (png_ptr, msg)
/* Avoid compiler warning about deprecated direct access to
png_ptr's fields in libpng versions 1.4.x. */
image_error ("PNG error: %s", build_string (msg), Qnil);
longjmp (png_ptr->jmpbuf, 1);
PNG_LONGJMP (png_ptr);
}
@ -5836,7 +5866,7 @@ png_load (f, img)
/* Set error jump-back. We come back here when the PNG library
detects an error. */
if (setjmp (png_ptr->jmpbuf))
if (setjmp (PNG_JMPBUF (png_ptr)))
{
error:
if (png_ptr)