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Imported from libpng-0.97a.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-01-03 22:40:55 -06:00
parent b6ce43d6ff
commit 70e3f543f1
14 changed files with 460 additions and 135 deletions
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12
pngwio.c
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@@ -33,6 +33,7 @@ png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
png_error(png_ptr, "Call to NULL write function");
}
#if !defined(PNG_NO_STDIO)
/* This is the function which does the actual writing of data. If you are
not writing to a standard C stream, you should create a replacement
write_data function and use it at run time with png_set_write_fn(), rather
@@ -98,6 +99,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
}
}
#endif
#endif
/* This function is called to output any data pending writing (normally
@@ -111,6 +113,7 @@ png_flush(png_structp png_ptr)
(*(png_ptr->output_flush_fn))(png_ptr);
}
#if !defined(PNG_NO_STDIO)
static void
png_default_flush(png_structp png_ptr)
{
@@ -120,6 +123,7 @@ png_default_flush(png_structp png_ptr)
fflush(io_ptr);
}
#endif
#endif
/* This function allows the application to supply new output functions for
libpng if standard C streams aren't being used.
@@ -149,16 +153,24 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
{
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (write_data_fn != NULL)
png_ptr->write_data_fn = write_data_fn;
else
png_ptr->write_data_fn = png_default_write_data;
#else
png_ptr->write_data_fn = write_data_fn;
#endif
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
#if !defined(PNG_NO_STDIO)
if (output_flush_fn != NULL)
png_ptr->output_flush_fn = output_flush_fn;
else
png_ptr->output_flush_fn = png_default_flush;
#else
png_ptr->output_flush_fn = output_flush_fn;
#endif
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */