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[libpng10] Imported from libpng-1.0.18.tar

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This commit is contained in:
Glenn Randers-Pehrson
2004-12-02 18:13:03 -06:00
parent df8fc6680e
commit b6c4193528
65 changed files with 2769 additions and 203 deletions
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14
pngwutil.c
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@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng version 1.0.17 - September 12, 2004
* libpng version 1.0.18 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -219,7 +219,7 @@ png_text_compress(png_structp png_ptr,
png_error(png_ptr, "zlib error");
}
/* check to see if we need more room */
if (!png_ptr->zstream.avail_out && png_ptr->zstream.avail_in)
if (!(png_ptr->zstream.avail_out))
{
/* make sure the output array has room */
if (comp->num_output_ptr >= comp->max_output_ptr)
@@ -357,9 +357,9 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
png_write_chunk_data(png_ptr, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
/* reset zlib for another zTXt/iTXt or the image data */
/* reset zlib for another zTXt/iTXt or image data */
deflateReset(&png_ptr->zstream);
png_ptr->zstream.data_type = Z_BINARY;
}
#endif
@@ -523,6 +523,9 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
/* libpng is not interested in zstream.data_type */
/* set it to a predefined value, to avoid its evaluation inside zlib */
png_ptr->zstream.data_type = Z_BINARY;
png_ptr->mode = PNG_HAVE_IHDR;
}
@@ -1871,6 +1874,7 @@ png_write_finish_row(png_structp png_ptr)
}
deflateReset(&png_ptr->zstream);
png_ptr->zstream.data_type = Z_BINARY;
}
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
@@ -2048,7 +2052,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
* been specified by the application, and then writes the row out with the
* chosen filter.
*/
#define PNG_MAXSUM (~((png_uint_32)0) >> 1)
#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1)
#define PNG_HISHIFT 10
#define PNG_LOMASK ((png_uint_32)0xffffL)
#define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT))