diff options
Diffstat (limited to 'devices/gdevfpng.c')
| -rw-r--r-- | devices/gdevfpng.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/devices/gdevfpng.c b/devices/gdevfpng.c index d57df8f8..f533d777 100644 --- a/devices/gdevfpng.c +++ b/devices/gdevfpng.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2001-2021 Artifex Software, Inc. +/* Copyright (C) 2001-2022 Artifex Software, Inc. All Rights Reserved. This software is provided AS-IS with no warranty, either express or @@ -301,6 +301,8 @@ static int fpng_process(void *arg, gx_device *dev, gx_device *bdev, const gs_int p = params.data[0]; stream.next_out = &buffer->data[0]; stream.avail_out = buffer->size; + stream.total_out = 0; + stream.total_in = 0; /* Nasty zlib hackery here. Zlib always outputs a 'start of stream' * marker at the beginning. We just want a block, so for all blocks @@ -311,7 +313,9 @@ static int fpng_process(void *arg, gx_device *dev, gx_device *bdev, const gs_int { stream.next_in = ⊂ stream.avail_in = 1; - deflate(&stream, Z_FULL_FLUSH); + err = deflate(&stream, Z_FULL_FLUSH); + if (err != Z_OK) + return_error(gs_error_VMerror); stream.next_out = &buffer->data[0]; stream.avail_out = buffer->size; stream.total_out = 0; @@ -321,15 +325,19 @@ static int fpng_process(void *arg, gx_device *dev, gx_device *bdev, const gs_int for (y = h-1; y >= 0; y--) { stream.avail_in = 1; - deflate(&stream, Z_NO_FLUSH); + err = deflate(&stream, Z_NO_FLUSH); + if (err != Z_OK) + return_error(gs_error_VMerror); stream.next_in = p; stream.avail_in = w*3; - deflate(&stream, (y == 0 ? (lastband ? Z_FINISH : Z_FULL_FLUSH) : Z_NO_FLUSH)); + err = deflate(&stream, (y == 0 ? (lastband ? Z_FINISH : Z_FULL_FLUSH) : Z_NO_FLUSH)); + if (err != Z_OK) + return_error(gs_error_VMerror); p += raster; stream.next_in = &paeth; } /* Ignore errors given here */ - deflateEnd(&stream); + (void)deflateEnd(&stream); buffer->compressed = stream.total_out; |