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Imported from libpng-0.96.tar

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This commit is contained in:
Andreas Dilger
1997-05-16 02:46:07 -05:00
committed by Glenn Randers-Pehrson
parent 02ad0efbc8
commit 47a0c422ca
40 changed files with 6833 additions and 3520 deletions
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286
pngpread.c
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@@ -1,10 +1,11 @@
/* pngpread.c - read a png file in push mode
libpng 1.0 beta 4 - version 0.90
libpng 1.0 beta 6 - version 0.96
For conditions of distribution and use, see copyright notice in png.h
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
January 10, 1997
Copyright (c) 1996, 1997 Andreas Dilger
May 12, 1997
*/
#define PNG_INTERNAL
@@ -14,7 +15,7 @@
void
png_process_data(png_structp png_ptr, png_infop info_ptr,
png_bytep buffer, png_uint_32 buffer_size)
png_bytep buffer, png_size_t buffer_size)
{
png_push_restore_buffer(png_ptr, buffer, buffer_size);
@@ -61,14 +62,9 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
break;
}
#endif
case PNG_READ_END_MODE:
{
png_push_read_chunk(png_ptr, info_ptr);
break;
}
case PNG_SKIP_MODE:
{
png_push_skip(png_ptr);
png_push_crc_finish(png_ptr);
break;
}
default:
@@ -87,8 +83,8 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
void
png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
{
int num_checked = png_ptr->sig_bytes,
num_to_check = 8 - num_checked;
png_size_t num_checked = png_ptr->sig_bytes,
num_to_check = 8 - num_checked;
if (png_ptr->buffer_size < num_to_check)
{
@@ -96,7 +92,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
}
png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
(png_uint_32)num_to_check);
num_to_check);
png_ptr->sig_bytes += num_to_check;
if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
@@ -137,8 +133,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_fill_buffer(png_ptr, chunk_length, 4);
png_ptr->push_length = png_get_uint_32(chunk_length);
png_reset_crc(png_ptr);
png_push_fill_buffer(png_ptr, png_ptr->chunk_name, 4);
png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
png_ptr->flags |= PNG_FLAG_HAVE_CHUNK_HEADER;
}
@@ -292,6 +287,18 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
#if defined(PNG_READ_pCAL_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
png_push_save_buffer(png_ptr);
return;
}
png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
#if defined(PNG_READ_tIME_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
{
@@ -325,21 +332,21 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
}
void
png_push_crc_skip(png_structp png_ptr, png_uint_32 length)
png_push_crc_skip(png_structp png_ptr, png_uint_32 skip)
{
png_ptr->process_mode = PNG_SKIP_MODE;
png_ptr->skip_length = length;
png_ptr->skip_length = skip;
}
void
png_push_skip(png_structp png_ptr)
png_push_crc_finish(png_structp png_ptr)
{
if (png_ptr->skip_length && png_ptr->save_buffer_size)
{
png_uint_32 save_size;
png_size_t save_size;
if (png_ptr->skip_length < png_ptr->save_buffer_size)
save_size = png_ptr->skip_length;
if (png_ptr->skip_length < (png_uint_32)png_ptr->save_buffer_size)
save_size = (png_size_t)png_ptr->skip_length;
else
save_size = png_ptr->save_buffer_size;
@@ -348,14 +355,14 @@ png_push_skip(png_structp png_ptr)
png_ptr->skip_length -= save_size;
png_ptr->buffer_size -= save_size;
png_ptr->save_buffer_size -= save_size;
png_ptr->save_buffer_ptr += (png_size_t)save_size;
png_ptr->save_buffer_ptr += save_size;
}
if (png_ptr->skip_length && png_ptr->current_buffer_size)
{
png_uint_32 save_size;
png_size_t save_size;
if (png_ptr->skip_length < png_ptr->current_buffer_size)
save_size = png_ptr->skip_length;
if (png_ptr->skip_length < (png_uint_32)png_ptr->current_buffer_size)
save_size = (png_size_t)png_ptr->skip_length;
else
save_size = png_ptr->current_buffer_size;
@@ -364,7 +371,7 @@ png_push_skip(png_structp png_ptr)
png_ptr->skip_length -= save_size;
png_ptr->buffer_size -= save_size;
png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += (png_size_t)save_size;
png_ptr->current_buffer_ptr += save_size;
}
if (!png_ptr->skip_length)
{
@@ -375,50 +382,45 @@ png_push_skip(png_structp png_ptr)
}
png_crc_finish(png_ptr, 0);
if (png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->process_mode = PNG_READ_END_MODE;
else
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
}
}
void
png_push_fill_buffer(png_structp png_ptr, png_bytep buffer,
png_uint_32 length)
png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
{
png_bytep ptr;
ptr = buffer;
if (png_ptr->save_buffer_size)
{
png_uint_32 save_size;
png_size_t save_size;
if (length < png_ptr->save_buffer_size)
save_size = length;
else
save_size = png_ptr->save_buffer_size;
png_memcpy(ptr, png_ptr->save_buffer_ptr, (png_size_t)save_size);
png_memcpy(ptr, png_ptr->save_buffer_ptr, save_size);
length -= save_size;
ptr += (png_size_t)save_size;
ptr += save_size;
png_ptr->buffer_size -= save_size;
png_ptr->save_buffer_size -= save_size;
png_ptr->save_buffer_ptr += (png_size_t)save_size;
png_ptr->save_buffer_ptr += save_size;
}
if (length && png_ptr->current_buffer_size)
{
png_uint_32 save_size;
png_size_t save_size;
if (length < png_ptr->current_buffer_size)
save_size = length;
else
save_size = png_ptr->current_buffer_size;
png_memcpy(ptr, png_ptr->current_buffer_ptr, (png_size_t)save_size);
png_memcpy(ptr, png_ptr->current_buffer_ptr, save_size);
png_ptr->buffer_size -= save_size;
png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += (png_size_t)save_size;
png_ptr->current_buffer_ptr += save_size;
}
}
@@ -429,7 +431,7 @@ png_push_save_buffer(png_structp png_ptr)
{
if (png_ptr->save_buffer_ptr != png_ptr->save_buffer)
{
int i;
png_size_t i;
png_bytep sp;
png_bytep dp;
@@ -444,25 +446,20 @@ png_push_save_buffer(png_structp png_ptr)
if (png_ptr->save_buffer_size + png_ptr->current_buffer_size >
png_ptr->save_buffer_max)
{
png_uint_32 new_max;
png_size_t new_max;
png_bytep old_buffer;
new_max = (int)(png_ptr->save_buffer_size +
png_ptr->current_buffer_size + 256);
new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
png_ptr->save_buffer = (png_bytep)
png_malloc(png_ptr, new_max);
png_memcpy(png_ptr->save_buffer, old_buffer,
(png_size_t)png_ptr->save_buffer_size);
png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr, new_max);
png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
png_free(png_ptr, old_buffer);
png_ptr->save_buffer_max = new_max;
png_ptr->save_buffer_max = new_max;
}
if (png_ptr->current_buffer_size)
{
png_memcpy(png_ptr->save_buffer +
(png_size_t)png_ptr->save_buffer_size,
png_ptr->current_buffer_ptr,
(png_size_t)png_ptr->current_buffer_size);
png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size,
png_ptr->current_buffer_ptr, png_ptr->current_buffer_size);
png_ptr->save_buffer_size += png_ptr->current_buffer_size;
png_ptr->current_buffer_size = 0;
}
@@ -472,7 +469,7 @@ png_push_save_buffer(png_structp png_ptr)
void
png_push_restore_buffer(png_structp png_ptr, png_bytep buffer,
png_uint_32 buffer_length)
png_size_t buffer_length)
{
png_ptr->current_buffer = buffer;
png_ptr->current_buffer_size = buffer_length;
@@ -497,13 +494,12 @@ png_push_read_IDAT(png_structp png_ptr)
png_ptr->push_length = png_get_uint_32(chunk_length);
png_reset_crc(png_ptr);
png_push_fill_buffer(png_ptr, png_ptr->chunk_name, 4);
png_calculate_crc(png_ptr, chunk_length, 4);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
png_ptr->flags |= PNG_FLAG_HAVE_CHUNK_HEADER;
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
{
png_ptr->process_mode = PNG_READ_END_MODE;
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
png_error(png_ptr, "Not enough compressed data");
return;
@@ -513,9 +509,9 @@ png_push_read_IDAT(png_structp png_ptr)
}
if (png_ptr->idat_size && png_ptr->save_buffer_size)
{
png_uint_32 save_size;
png_size_t save_size;
if (png_ptr->idat_size < png_ptr->save_buffer_size)
if (png_ptr->idat_size < (png_uint_32)png_ptr->save_buffer_size)
save_size = png_ptr->idat_size;
else
save_size = png_ptr->save_buffer_size;
@@ -526,13 +522,13 @@ png_push_read_IDAT(png_structp png_ptr)
png_ptr->idat_size -= save_size;
png_ptr->buffer_size -= save_size;
png_ptr->save_buffer_size -= save_size;
png_ptr->save_buffer_ptr += (png_size_t)save_size;
png_ptr->save_buffer_ptr += save_size;
}
if (png_ptr->idat_size && png_ptr->current_buffer_size)
{
png_uint_32 save_size;
png_size_t save_size;
if (png_ptr->idat_size < png_ptr->current_buffer_size)
if (png_ptr->idat_size < (png_uint_32)png_ptr->current_buffer_size)
save_size = png_ptr->idat_size;
else
save_size = png_ptr->current_buffer_size;
@@ -543,7 +539,7 @@ png_push_read_IDAT(png_structp png_ptr)
png_ptr->idat_size -= save_size;
png_ptr->buffer_size -= save_size;
png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += (png_size_t)save_size;
png_ptr->current_buffer_ptr += save_size;
}
if (!png_ptr->idat_size)
{
@@ -560,7 +556,7 @@ png_push_read_IDAT(png_structp png_ptr)
void
png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
png_uint_32 buffer_length)
png_size_t buffer_length)
{
int ret;
@@ -569,22 +565,25 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
png_ptr->zstream.next_in = buffer;
png_ptr->zstream.avail_in = (uInt)buffer_length;
do
while(1)
{
ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
if (ret == Z_STREAM_END)
{
if (png_ptr->zstream.avail_in)
png_error(png_ptr, "Extra compressed data");
if (!png_ptr->zstream.avail_out)
if (!(png_ptr->zstream.avail_out))
{
png_push_process_row(png_ptr);
}
png_ptr->mode = PNG_AFTER_IDAT;
png_ptr->mode |= PNG_AFTER_IDAT;
png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
break;
}
if (ret != Z_OK)
else if (ret == Z_BUF_ERROR)
break;
else if (ret != Z_OK)
png_error(png_ptr, "Decompression Error");
if (!(png_ptr->zstream.avail_out))
{
@@ -592,8 +591,9 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes;
png_ptr->zstream.next_out = png_ptr->row_buf;
}
} while (png_ptr->zstream.avail_in);
else
break;
}
}
void
@@ -611,19 +611,18 @@ png_push_process_row(png_structp png_ptr)
png_ptr->row_buf + 1, png_ptr->prev_row + 1,
(int)(png_ptr->row_buf[0]));
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, (png_size_t)png_ptr->rowbytes + 1);
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
if (png_ptr->transformations)
png_do_read_transformations(png_ptr);
#if defined(PNG_READ_INTERLACING_SUPPORTED)
/* blow up interlaced rows to full size */
if (png_ptr->interlaced &&
(png_ptr->transformations & PNG_INTERLACE))
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
png_do_read_interlace(&(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->pass);
png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
switch (png_ptr->pass)
{
@@ -747,7 +746,7 @@ png_read_push_finish_row(png_structp png_ptr)
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
png_memset(png_ptr->prev_row, 0, (png_size_t)png_ptr->rowbytes + 1);
png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
do
{
png_ptr->pass++;
@@ -781,8 +780,19 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
if (png_ptr->mode == PNG_BEFORE_IHDR || png_ptr->mode & PNG_HAVE_IEND)
png_error(png_ptr, "Out of place tEXt");
png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[(png_size_t)length] = '\0';
#ifdef PNG_MAX_MALLOC_64K
png_ptr->skip_length = 0; /* This may not be necessary */
if (length > 65535L) /* We can't hold the entire string in memory */
{
png_warning(png_ptr, "tEXt chunk too large to fit in memory");
png_ptr->skip_length = length - 65535L;
length = 65535L;
}
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr, length+1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = length;
png_ptr->current_text_left = length;
@@ -794,21 +804,19 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr->buffer_size && png_ptr->current_text_left)
{
png_uint_32 text_size;
png_size_t text_size;
if (png_ptr->buffer_size < png_ptr->current_text_left)
text_size = png_ptr->buffer_size;
else
text_size = png_ptr->current_text_left;
png_push_fill_buffer(png_ptr, (png_bytep)png_ptr->current_text_ptr,
text_size);
png_calculate_crc(png_ptr, (png_bytep)png_ptr->current_text_ptr,
text_size);
png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
png_ptr->current_text_left -= text_size;
png_ptr->current_text_ptr += (png_size_t)text_size;
png_ptr->current_text_ptr += text_size;
}
if (!(png_ptr->current_text_left))
{
png_textp text_ptr;
png_charp text;
png_charp key;
@@ -818,7 +826,12 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
return;
}
png_crc_finish(png_ptr, 0);
png_push_crc_finish(png_ptr);
#if defined(PNG_MAX_MALLOC_64K)
if (png_ptr->skip_length)
return;
#endif
key = png_ptr->current_text;
png_ptr->current_text = 0;
@@ -826,20 +839,17 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
for (text = key; *text; text++)
/* empty loop */ ;
if (text != key + (png_size_t)png_ptr->current_text_size)
if (text != key + png_ptr->current_text_size)
text++;
png_read_tEXt(png_ptr, info_ptr, key, text,
png_ptr->current_text_size - (text - key));
text_ptr = (png_textp)png_malloc(png_ptr, sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
text_ptr->key = key;
text_ptr->text = text;
if (png_ptr->mode == PNG_AFTER_IDAT)
{
png_ptr->process_mode = PNG_READ_END_MODE;
}
else
{
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
}
png_set_text(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, text_ptr);
}
}
#endif
@@ -851,8 +861,21 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
if (png_ptr->mode == PNG_BEFORE_IHDR || png_ptr->mode & PNG_HAVE_IEND)
png_error(png_ptr, "Out of place zTXt");
png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[(png_size_t)length] = '\0';
#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 > 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, length+1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = length;
png_ptr->current_text_left = length;
@@ -864,25 +887,23 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr->buffer_size && png_ptr->current_text_left)
{
png_uint_32 text_size;
png_size_t text_size;
if (png_ptr->buffer_size < png_ptr->current_text_left)
if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left)
text_size = png_ptr->buffer_size;
else
text_size = png_ptr->current_text_left;
png_push_fill_buffer(png_ptr, (png_bytep)png_ptr->current_text_ptr,
text_size);
png_calculate_crc(png_ptr, (png_bytep)png_ptr->current_text_ptr,
text_size);
png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
png_ptr->current_text_left -= text_size;
png_ptr->current_text_ptr += (png_size_t)text_size;
png_ptr->current_text_ptr += text_size;
}
if (!(png_ptr->current_text_left))
{
png_textp text_ptr;
png_charp text;
png_charp key;
int ret;
png_uint_32 text_size, key_size;
png_size_t text_size, key_size;
if (png_ptr->buffer_size < 4)
{
@@ -890,7 +911,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
return;
}
png_crc_finish(png_ptr, 0);
png_push_crc_finish(png_ptr);
key = png_ptr->current_text;
png_ptr->current_text = 0;
@@ -899,7 +920,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
/* empty loop */ ;
/* zTXt can't have zero text */
if (text == key + (png_size_t)png_ptr->current_text_size)
if (text == key + png_ptr->current_text_size)
{
png_free(png_ptr, key);
return;
@@ -907,7 +928,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
text++;
if (*text) /* check compression byte */
if (*text != PNG_TEXT_COMPRESSION_zTXt) /* check compression byte */
{
png_free(png_ptr, key);
return;
@@ -919,7 +940,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size -
(text - key));
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (png_size_t)png_ptr->zbuf_size;
png_ptr->zstream.avail_out = png_ptr->zbuf_size;
key_size = text - key;
text_size = 0;
@@ -937,19 +958,19 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
png_free(png_ptr, text);
return;
}
if (!png_ptr->zstream.avail_out || ret == Z_STREAM_END)
if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END)
{
if (!text)
if (text == NULL)
{
text = (png_charp)png_malloc(png_ptr,
png_ptr->zbuf_size - png_ptr->zstream.avail_out +
key_size + 1);
png_memcpy(text + (png_size_t)key_size, png_ptr->zbuf,
(png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
png_memcpy(text, key, (png_size_t)key_size);
text_size = key_size + (png_size_t)png_ptr->zbuf_size -
png_memcpy(text + key_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
png_memcpy(text, key, key_size);
text_size = key_size + png_ptr->zbuf_size -
png_ptr->zstream.avail_out;
*(text + (png_size_t)text_size) = '\0';
*(text + text_size) = '\0';
}
else
{
@@ -958,12 +979,12 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
tmp = text;
text = png_malloc(png_ptr, text_size +
png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1);
png_memcpy(text, tmp, (png_size_t)text_size);
png_memcpy(text, tmp, text_size);
png_free(png_ptr, tmp);
png_memcpy(text + (png_size_t)text_size, png_ptr->zbuf,
(png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
png_memcpy(text + text_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
*(text + (png_size_t)text_size) = '\0';
*(text + text_size) = '\0';
}
if (ret != Z_STREAM_END)
{
@@ -992,18 +1013,17 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
png_free(png_ptr, key);
key = text;
text += (png_size_t)key_size;
text += key_size;
text_size -= key_size;
png_read_zTXt(png_ptr, info_ptr, key, text, text_size, 0);
if (png_ptr->mode == PNG_AFTER_IDAT)
{
png_ptr->process_mode = PNG_READ_END_MODE;
}
else
{
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
}
text_ptr = (png_textp)png_malloc(png_ptr, sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
text_ptr->key = key;
text_ptr->text = text;
png_set_text(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, text_ptr);
}
}
#endif
@@ -1033,21 +1053,21 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 len
void
png_push_have_info(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr->info_fn)
if (png_ptr->info_fn != NULL)
(*(png_ptr->info_fn))(png_ptr, info_ptr);
}
void
png_push_have_end(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr->end_fn)
if (png_ptr->end_fn != NULL)
(*(png_ptr->end_fn))(png_ptr, info_ptr);
}
void
png_push_have_row(png_structp png_ptr, png_bytep row)
{
if (png_ptr->row_fn)
if (png_ptr->row_fn != NULL)
(*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number,
(int)png_ptr->pass);
}
@@ -1056,7 +1076,7 @@ void
png_progressive_combine_row (png_structp png_ptr,
png_bytep old_row, png_bytep new_row)
{
if (new_row)
if (new_row != NULL)
png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
}