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Imported from libpng-1.2.19beta24.tar

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This commit is contained in:
Glenn Randers-Pehrson
2007-07-14 14:43:24 -05:00
parent 67c75ee7f0
commit 80663032a9
65 changed files with 436 additions and 120 deletions
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23
pngwrite.c
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@@ -1141,15 +1141,26 @@ png_set_filter(png_structp png_ptr, int method, int filters)
{
switch (filters & (PNG_ALL_FILTERS | 0x07))
{
#ifndef PNG_NO_WRITE_FILTER
case 5:
case 6:
case 7: png_warning(png_ptr, "Unknown row filter for method 0");
case PNG_FILTER_VALUE_NONE: png_ptr->do_filter=PNG_FILTER_NONE; break;
case PNG_FILTER_VALUE_SUB: png_ptr->do_filter=PNG_FILTER_SUB; break;
case PNG_FILTER_VALUE_UP: png_ptr->do_filter=PNG_FILTER_UP; break;
case PNG_FILTER_VALUE_AVG: png_ptr->do_filter=PNG_FILTER_AVG; break;
case PNG_FILTER_VALUE_PAETH: png_ptr->do_filter=PNG_FILTER_PAETH;break;
#endif /* PNG_NO_WRITE_FILTER */
case PNG_FILTER_VALUE_NONE:
png_ptr->do_filter=PNG_FILTER_NONE; break;
#ifndef PNG_NO_WRITE_FILTER
case PNG_FILTER_VALUE_SUB:
png_ptr->do_filter=PNG_FILTER_SUB; break;
case PNG_FILTER_VALUE_UP:
png_ptr->do_filter=PNG_FILTER_UP; break;
case PNG_FILTER_VALUE_AVG:
png_ptr->do_filter=PNG_FILTER_AVG; break;
case PNG_FILTER_VALUE_PAETH:
png_ptr->do_filter=PNG_FILTER_PAETH; break;
default: png_ptr->do_filter = (png_byte)filters; break;
#else
default: png_warning(png_ptr, "Unknown row filter for method 0");
#endif /* PNG_NO_WRITE_FILTER */
}
/* If we have allocated the row_buf, this means we have already started
@@ -1163,6 +1174,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
*/
if (png_ptr->row_buf != NULL)
{
#ifndef PNG_NO_WRITE_FILTER
if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
{
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
@@ -1217,6 +1229,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
}
if (png_ptr->do_filter == PNG_NO_FILTERS)
#endif /* PNG_NO_WRITE_FILTER */
png_ptr->do_filter = PNG_FILTER_NONE;
}
}