diff options
Diffstat (limited to 'pngwio.c')
| -rw-r--r-- | pngwio.c | 15 |
1 files changed, 10 insertions, 5 deletions
@@ -1,7 +1,7 @@ /* pngwio.c - functions for data output * - * Last changed in libpng 1.2.35 [February 14, 2009] + * Last changed in libpng 1.2.36 [May 7, 2009] * For conditions of distribution and use, see copyright notice in png.h * Copyright (c) 1998-2009 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) @@ -137,8 +137,7 @@ png_default_flush(png_structp png_ptr) if (png_ptr == NULL) return; #if !defined(_WIN32_WCE) io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr)); - if (io_ptr != NULL && fileno(io_ptr) != -1) - fflush(io_ptr); + fflush(io_ptr); #endif } #endif @@ -156,7 +155,9 @@ png_default_flush(png_structp png_ptr) data to be written, and a 32-bit unsigned int that is the number of bytes to be written. The new write function should call png_error(png_ptr, "Error msg") - to exit and output any fatal error messages. + to exit and output any fatal error messages. May be + NULL, in which case libpng's default function will + be used. flush_data_fn - pointer to a new flush function that takes as its arguments a pointer to a png_struct. After a call to the flush function, there should be no data in any buffers @@ -165,7 +166,11 @@ png_default_flush(png_structp png_ptr) supplied although it doesn't have to do anything. If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time, output_flush_fn will be ignored, although it must be - supplied for compatibility. */ + supplied for compatibility. May be NULL, in which case + libpng's default function will be used, if + PNG_WRITE_FLUSH_SUPPORTED is defined. This is not + a good idea if io_ptr does not point to a standard + *FILE structure. */ void PNGAPI png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn) |