void /* PRIVATE */
png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
png_error(png_ptr, "Out of place iTXt");
/*NOT REACHED*/
}
#ifdef PNG_MAX_MALLOC_64K
png_ptr->skip_length = 0; /* This may not be necessary */
if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
{
png_warning(png_ptr, "iTXt chunk too large to fit in memory");
png_ptr->skip_length = length - (png_uint_32)65535L;
length = (png_uint_32)65535L;
}
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_size_t)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
png_ptr->current_text_left = (png_size_t)length;
png_ptr->process_mode = PNG_READ_iTXt_MODE;
}
void /* PRIVATE */
png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
png_error(png_ptr, "Out of place zTXt");
/*NOT REACHED*/
}
#ifdef PNG_MAX_MALLOC_64K
/* We can't handle zTXt chunks > 64K, since we don't have enough space
* to be able to store the uncompressed data. Actually, the threshold
* is probably around 32K, but it isn't as definite as 64K is.
*/
if (length > (png_uint_32)65535L)
{
png_warning(png_ptr, "zTXt chunk too large to fit in memory");
png_push_crc_skip(png_ptr, length);
return;
}
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_size_t)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
png_ptr->current_text_left = (png_size_t)length;
png_ptr->process_mode = PNG_READ_zTXt_MODE;
}
void
png_read_filter_row_sub3_sse(png_row_infop row_info, png_bytep row,
png_const_bytep prev_row)
{
png_size_t i;
png_bytep rp = row;
__m128i racc = _mm_setzero_si128();
PNG_UNUSED(prev_row)
__m128i nrb = _mm_load_si128((__m128i*)(rp));
for (i = 0; i < row_info->rowbytes; i += 15, rp += 15)
{
__m128i rb = nrb;
#ifndef __SSSE3__
nrb = _mm_loadu_si128((__m128i*)(rp + 15));
racc = _mm_srli_si128(_mm_slli_si128(racc, 1), 13);
racc = _mm_or_si128(racc, _mm_slli_si128(rb, 3));
#else
nrb = _mm_lddqu_si128((__m128i*)(rp + 15));
racc = _mm_alignr_epi8(rb, _mm_slli_si128(racc, 1), 13);
#endif
rb = _mm_add_epi8(rb, racc);
racc = _mm_slli_si128(racc, 3);
rb = _mm_add_epi8(rb, racc);
racc = _mm_slli_si128(racc, 3);
rb = _mm_add_epi8(rb, racc);
racc = _mm_slli_si128(racc, 3);
rb = _mm_add_epi8(rb, racc);
racc = _mm_slli_si128(racc, 3);
rb = _mm_add_epi8(rb, racc);
racc = rb;
_mm_storeu_si128((__m128i*)rp, rb);
}
}
