static void (*qpng_write_row) (void*, unsigned char*);
static void (*qpng_write_end) (void*, void*);
-// libpng longjmp hack
+// libpng 1.4+ longjmp hack
typedef void (*qpng_longjmp_ptr) (jmp_buf, int);
static jmp_buf* (*qpng_set_longjmp_fn) (void *, qpng_longjmp_ptr, size_t);
-#define qpng_jmpbuf(png_ptr) (*qpng_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf)))
+#define qpng_jmpbuf_14(png_ptr) (*qpng_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf)))
+
+// libpng 1.2 longjmp hack
+#define qpng_jmpbuf_12(png_ptr) (*((jmp_buf *) png_ptr))
+
+// all version support
+#define qpng_jmpbuf(png_ptr) \
+ (qpng_set_longjmp_fn ? qpng_jmpbuf_14(png_ptr) : qpng_jmpbuf_12(png_ptr))
static dllfunction_t pngfuncs[] =
{
{"png_write_info", (void **) &qpng_write_info},
{"png_write_row", (void **) &qpng_write_row},
{"png_write_end", (void **) &qpng_write_end},
+ {NULL, NULL}
+};
+static dllfunction_t png14funcs[] =
+{
{"png_set_longjmp_fn", (void **) &qpng_set_longjmp_fn},
{NULL, NULL}
};
// Handle for PNG DLL
dllhandle_t png_dll = NULL;
+dllhandle_t png14_dll = NULL;
/*
return true;
// Load the DLL
- return Sys_LoadLibrary (dllnames, &png_dll, pngfuncs);
+ if(!Sys_LoadLibrary (dllnames, &png_dll, pngfuncs))
+ return false;
+ if(qpng_access_version_number() / 100 >= 104)
+ if(!Sys_LoadLibrary (dllnames, &png14_dll, png14funcs))
+ {
+ Sys_UnloadLibrary (&png_dll);
+ return false;
+ }
+ return true;
}
*/
void PNG_CloseLibrary (void)
{
+ Sys_UnloadLibrary (&png14_dll);
Sys_UnloadLibrary (&png_dll);
}
}
png = (void *)qpng_create_write_struct(
- (qpng_access_version_number() / 100 == 102) ? PNG_LIBPNG_VER_STRING_12 : PNG_LIBPNG_VER_STRING_14, // nasty hack to support both libpng12 and libpng14
+ (qpng_access_version_number() / 100 == 102) ? PNG_LIBPNG_VER_STRING_12 :
+ (qpng_access_version_number() / 100 == 104) ? PNG_LIBPNG_VER_STRING_14 :
+ PNG_LIBPNG_VER_STRING_15, // nasty hack... whatever
0, PNG_error_fn, PNG_warning_fn
);
if(!png)