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Imported from libpng-1.2.20rc3.tar

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This commit is contained in:
Glenn Randers-Pehrson
2007-08-29 22:31:46 -05:00
parent b38f12d519
commit 9cc7b03503
55 changed files with 174 additions and 1066 deletions
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14
pngwutil.c
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@@ -1726,6 +1726,7 @@ png_write_tIME(png_structp png_ptr, png_timep mod_time)
void /* PRIVATE */
png_write_start_row(png_structp png_ptr)
{
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
#ifdef PNG_USE_LOCAL_ARRAYS
/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
@@ -1740,6 +1741,7 @@ png_write_start_row(png_structp png_ptr)
/* offset to next interlace block in the y direction */
int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
#endif
png_size_t buf_size;
@@ -1822,6 +1824,7 @@ png_write_start_row(png_structp png_ptr)
void /* PRIVATE */
png_write_finish_row(png_structp png_ptr)
{
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
#ifdef PNG_USE_LOCAL_ARRAYS
/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
@@ -1836,6 +1839,7 @@ png_write_finish_row(png_structp png_ptr)
/* offset to next interlace block in the y direction */
int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
#endif
int ret;
@@ -2110,7 +2114,9 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
void /* PRIVATE */
png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
{
png_bytep prev_row, best_row, row_buf;
png_bytep best_row;
#ifndef PNG_NO_WRITE_FILTER
png_bytep prev_row, row_buf;
png_uint_32 mins, bpp;
png_byte filter_to_do = png_ptr->do_filter;
png_uint_32 row_bytes = row_info->rowbytes;
@@ -2123,8 +2129,10 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
bpp = (row_info->pixel_depth + 7) >> 3;
prev_row = png_ptr->prev_row;
best_row = row_buf = png_ptr->row_buf;
#endif
best_row = png_ptr->row_buf;
#ifndef PNG_NO_WRITE_FILTER
row_buf = best_row;
mins = PNG_MAXSUM;
/* The prediction method we use is to find which method provides the
@@ -2704,6 +2712,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_write_filtered_row(png_ptr, best_row);
#ifndef PNG_NO_WRITE_FILTER
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
/* Save the type of filter we picked this time for future calculations */
if (png_ptr->num_prev_filters > 0)
@@ -2716,6 +2725,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_ptr->prev_filters[j] = best_row[0];
}
#endif
#endif /* PNG_NO_WRITE_FILTER */
}