Remove openjpeg write support.

core/fxcodec/codec/fx_codec_jpx_opj.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include <algorithm>
 #include <limits>
 #include <memory>
 #include <vector>
@@ skipping 26 matching lines @@
   if (srcData->offset >= srcData->src_size) {
     return static_cast<OPJ_SIZE_T>(-1);
   }
   OPJ_SIZE_T bufferLength = srcData->src_size - srcData->offset;
   OPJ_SIZE_T readlength = nb_bytes < bufferLength ? nb_bytes : bufferLength;
   memcpy(p_buffer, &srcData->src_data[srcData->offset], readlength);
   srcData->offset += readlength;
   return readlength;
 }
 
-OPJ_SIZE_T opj_write_from_memory(void* p_buffer,
-                                 OPJ_SIZE_T nb_bytes,
-                                 void* p_user_data) {
-  DecodeData* srcData = static_cast<DecodeData*>(p_user_data);
-  if (!srcData || !srcData->src_data || srcData->src_size == 0) {
-    return static_cast<OPJ_SIZE_T>(-1);
-  }
-  // Writes at EOF return an error code.
-  if (srcData->offset >= srcData->src_size) {
-    return static_cast<OPJ_SIZE_T>(-1);
-  }
-  OPJ_SIZE_T bufferLength = srcData->src_size - srcData->offset;
-  OPJ_SIZE_T writeLength = nb_bytes < bufferLength ? nb_bytes : bufferLength;
-  memcpy(&srcData->src_data[srcData->offset], p_buffer, writeLength);
-  srcData->offset += writeLength;
-  return writeLength;
-}
-
 OPJ_OFF_T opj_skip_from_memory(OPJ_OFF_T nb_bytes, void* p_user_data) {
   DecodeData* srcData = static_cast<DecodeData*>(p_user_data);
   if (!srcData || !srcData->src_data || srcData->src_size == 0) {
     return static_cast<OPJ_OFF_T>(-1);
   }
   // Offsets are signed and may indicate a negative skip. Do not support this
   // because of the strange return convention where either bytes skipped or
   // -1 is returned. Following that convention, a successful relative seek of
   // -1 bytes would be required to to give the same result as the error case.
   if (nb_bytes < 0) {
@@ skipping 50 matching lines @@
   if (!data || !data->src_data || data->src_size <= 0) {
     return nullptr;
   }
   l_stream = opj_stream_create(p_size, p_is_read_stream);
   if (!l_stream) {
     return nullptr;
   }
   opj_stream_set_user_data(l_stream, data, nullptr);
   opj_stream_set_user_data_length(l_stream, data->src_size);
   opj_stream_set_read_function(l_stream, opj_read_from_memory);
-  opj_stream_set_write_function(l_stream, opj_write_from_memory);
   opj_stream_set_skip_function(l_stream, opj_skip_from_memory);
   opj_stream_set_seek_function(l_stream, opj_seek_from_memory);
   return l_stream;
 }
 static void sycc_to_rgb(int offset,
                         int upb,
                         int y,
                         int cb,
                         int cr,
                         int* out_r,
@@ skipping 764 matching lines @@
 bool CCodec_JpxModule::Decode(CJPX_Decoder* pDecoder,
                               uint8_t* dest_data,
                               int pitch,
                               const std::vector<uint8_t>& offsets) {
   return pDecoder->Decode(dest_data, pitch, offsets);
 }
 
 void CCodec_JpxModule::DestroyDecoder(CJPX_Decoder* pDecoder) {
   delete pDecoder;
 }