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[master] Imported from libpng-1.6.17.tar

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This commit is contained in:
Glenn Randers-Pehrson
2015-03-26 08:06:25 -05:00
parent 070a616b82
commit 2b667e4923
54 changed files with 1495 additions and 699 deletions
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52
pngwutil.c
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@@ -1,8 +1,8 @@
/* pngwutil.c - utilities to write a PNG file
*
* Last changed in libpng 1.6.15 [November 20, 2014]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson
* Last changed in libpng 1.6.17 [March 26, 2015]
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -23,10 +23,10 @@
void PNGAPI
png_save_uint_32(png_bytep buf, png_uint_32 i)
{
buf[0] = (png_byte)((i >> 24) & 0xff);
buf[1] = (png_byte)((i >> 16) & 0xff);
buf[2] = (png_byte)((i >> 8) & 0xff);
buf[3] = (png_byte)(i & 0xff);
buf[0] = (png_byte)(i >> 24);
buf[1] = (png_byte)(i >> 16);
buf[2] = (png_byte)(i >> 8);
buf[3] = (png_byte)(i );
}
/* Place a 16-bit number into a buffer in PNG byte order.
@@ -36,8 +36,8 @@ png_save_uint_32(png_bytep buf, png_uint_32 i)
void PNGAPI
png_save_uint_16(png_bytep buf, unsigned int i)
{
buf[0] = (png_byte)((i >> 8) & 0xff);
buf[1] = (png_byte)(i & 0xff);
buf[0] = (png_byte)(i >> 8);
buf[1] = (png_byte)(i );
}
#endif
@@ -695,7 +695,7 @@ png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
while (*key && key_len < 79)
{
png_byte ch = (png_byte)(0xff & *key++);
png_byte ch = (png_byte)*key++;
if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/))
*new_key++ = ch, ++key_len, space = 0;
@@ -871,7 +871,7 @@ png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height,
interlace_type=PNG_INTERLACE_NONE;
#endif
/* Save the relevent information */
/* Save the relevant information */
png_ptr->bit_depth = (png_byte)bit_depth;
png_ptr->color_type = (png_byte)color_type;
png_ptr->interlaced = (png_byte)interlace_type;
@@ -1765,7 +1765,7 @@ png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key,
png_write_compressed_data_out(png_ptr, &comp);
else
png_write_chunk_data(png_ptr, (png_const_bytep)text, comp.input_len);
png_write_chunk_data(png_ptr, (png_const_bytep)text, comp.output_len);
png_write_chunk_end(png_ptr);
}
@@ -2314,7 +2314,7 @@ 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.
*/
static void
static void /* PRIVATE */
png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
png_size_t row_bytes);
@@ -2453,7 +2453,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (lp = row_buf + 1; i < row_bytes;
i++, rp++, lp++, dp++)
{
*dp = (png_byte)(((int)*rp - (int)*lp) & 0xff);
*dp = (png_byte)((int)*rp - (int)*lp);
}
best_row = png_ptr->sub_row;
@@ -2515,7 +2515,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (lp = row_buf + 1; i < row_bytes;
i++, rp++, lp++, dp++)
{
v = *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff);
v = *dp = (png_byte)((int)*rp - (int)*lp);
sum += (v < 128) ? v : 256 - v;
@@ -2574,7 +2574,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
pp = prev_row + 1; i < row_bytes;
i++, rp++, pp++, dp++)
{
*dp = (png_byte)(((int)*rp - (int)*pp) & 0xff);
*dp = (png_byte)((int)*rp - (int)*pp);
}
best_row = png_ptr->up_row;
@@ -2625,7 +2625,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
pp = prev_row + 1; i < row_bytes; i++)
{
v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
v = *dp++ = (png_byte)((int)*rp++ - (int)*pp++);
sum += (v < 128) ? v : 256 - v;
@@ -2683,13 +2683,13 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
pp = prev_row + 1; i < bpp; i++)
{
*dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff);
*dp++ = (png_byte)((int)*rp++ - ((int)*pp++ / 2));
}
for (lp = row_buf + 1; i < row_bytes; i++)
{
*dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2))
& 0xff);
*dp++ =
(png_byte)((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2));
}
best_row = png_ptr->avg_row;
}
@@ -2738,7 +2738,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
pp = prev_row + 1; i < bpp; i++)
{
v = *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff);
v = *dp++ = (png_byte)((int)*rp++ - ((int)*pp++ / 2));
sum += (v < 128) ? v : 256 - v;
}
@@ -2746,7 +2746,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (lp = row_buf + 1; i < row_bytes; i++)
{
v = *dp++ =
(png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff);
(png_byte)(((int)*rp++ - ((int)*pp++ + (int)*lp++) / 2));
sum += (v < 128) ? v : 256 - v;
@@ -2804,7 +2804,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
pp = prev_row + 1; i < bpp; i++)
{
*dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
*dp++ = (png_byte)((int)*rp++ - (int)*pp++);
}
for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++)
@@ -2830,7 +2830,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c;
*dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
*dp++ = (png_byte)((int)*rp++ - p);
}
best_row = png_ptr->paeth_row;
}
@@ -2879,7 +2879,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
pp = prev_row + 1; i < bpp; i++)
{
v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
v = *dp++ = (png_byte)((int)*rp++ - (int)*pp++);
sum += (v < 128) ? v : 256 - v;
}
@@ -2921,7 +2921,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
p = c;
#endif /* SLOW_PAETH */
v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
v = *dp++ = (png_byte)((int)*rp++ - p);
sum += (v < 128) ? v : 256 - v;
@@ -3003,6 +3003,7 @@ png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
png_compress_IDAT(png_ptr, filtered_row, full_row_length, Z_NO_FLUSH);
#ifdef PNG_WRITE_FILTER_SUPPORTED
/* Swap the current and previous rows */
if (png_ptr->prev_row != NULL)
{
@@ -3012,6 +3013,7 @@ png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
png_ptr->prev_row = png_ptr->row_buf;
png_ptr->row_buf = tptr;
}
#endif /* WRITE_FILTER */
/* Finish row - updates counters and flushes zlib if last row */
png_write_finish_row(png_ptr);