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; The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in

; pngconf.h and in the *.dfn files in the scripts directory.

;   PNG_EXPORT(ordinal, type, name, (args));

;       ordinal:    ordinal that is used while building

;                   *.def files. The ordinal value is only

;                   relevant when preprocessing png.h with

;                   the *.dfn files for building symbol table

;                   entries, and are removed by pngconf.h.

;       type:       return type of the function

;       name:       function name

;       args:       function arguments, with types

; When we wish to append attributes to a function prototype we use

; the PNG_EXPORTA() macro instead.

;   PNG_EXPORTA(ordinal, type, name, (args), attributes);

;       ordinal, type, name, and args: same as in PNG_EXPORT().

;       attributes: function attributes

macro PNG_EXPORT ordinal, typ, nam, arg

{

align 4

nam:

local .end_t

local .m_txt

jmp .end_t

	.m_txt db `nam,13,10,0

.end_t:

	stdcall dbg_print,txt_zv,.m_txt

ret

; These next functions are called for input/output, memory, and error

; handling.  They are in the file pngrio.c, pngwio.c, and pngerror.c,

; and call standard C I/O routines such as fread(), fwrite(), and

; fprintf().  These functions can be made to use other I/O routines

; at run time for those applications that need to handle I/O in a

; different manner by calling png_set_???_fn().  See libpng-manual.txt for

; more information.

; Replace the default data input function with a user supplied one.

PNG_EXPORT 78, void, png_set_read_fn, '(png_structrp png_ptr, voidp io_ptr, png_rw_ptr read_data_fn)'

; Reassign responsibility for freeing existing data, whether allocated

; by libpng or by the application; this works on the png_info structure passed

; in, it does not change the state for other png_info structures.

; The same, but the chunk name is prepended to the error string.

;PNG_EXPORTA(103, void, png_chunk_error, (png_const_structrp png_ptr,

;    charp error_message), PNG_NORETURN);

;#else

; Fatal error in PNG image of libpng - can't continue

;end if

;#  define png_warning(s1,s2) ((void)(s1))

;#  define png_chunk_warning(s1,s2) ((void)(s1))

; Benign error in libpng.  Can continue, but may have a problem.

PNG_EXPORT 107, void, png_benign_error, '(png_const_structrp png_ptr, charp warning_message)'