File indexing completed on 2025-02-02 04:21:39

 /*
  *  SPDX-FileCopyrightText: 2009 Adrian Page <adrian@pagenet.plus.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "kis_jpeg_destination.h"
 
 #include <jerror.h>
 
 #include <QIODevice>
 
 #include "kis_debug.h"
 
 namespace
 {
 
 const qint64 OUTPUT_BUFFER_SIZE = 4096;
 
 struct KisJPEGDestinationManager : public jpeg_destination_mgr
 {
     void writeData(j_compress_ptr cinfo, const qint64 numBytesToWrite)
     {
         if (output->write(reinterpret_cast<const char*>(buffer), numBytesToWrite) != numBytesToWrite) {
             ERREXIT(cinfo, JERR_FILE_WRITE);
         }
     }
 
     QIODevice* output;
     JOCTET* buffer;
 };
 
 typedef KisJPEGDestinationManager* KisJPEGDestinationManagerPtr;
 
 extern "C"
 {
 
 void init_destination(j_compress_ptr cinfo)
 {
     KisJPEGDestinationManagerPtr dest = (KisJPEGDestinationManagerPtr)cinfo->dest;
 
     dest->buffer = (JOCTET *)
       (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
                   OUTPUT_BUFFER_SIZE*sizeof(JOCTET));
 
     dest->next_output_byte = dest->buffer;
     dest->free_in_buffer = OUTPUT_BUFFER_SIZE;
 }
 
 boolean empty_output_buffer(j_compress_ptr cinfo)
 {
     KisJPEGDestinationManagerPtr dest = (KisJPEGDestinationManagerPtr)cinfo->dest;
 
     dest->writeData(cinfo, OUTPUT_BUFFER_SIZE);
     dest->next_output_byte = dest->buffer;
     dest->free_in_buffer = OUTPUT_BUFFER_SIZE;
 
     return (boolean)true;
 }
 
 void term_destination(j_compress_ptr cinfo)
 {
     KisJPEGDestinationManagerPtr dest = (KisJPEGDestinationManagerPtr)cinfo->dest;
     const qint64 numBytesToWrite = OUTPUT_BUFFER_SIZE-(qint64)dest->free_in_buffer;
 
     if (numBytesToWrite > 0) {
         dest->writeData(cinfo, numBytesToWrite);
     }
 }
 
 }
 }
 
 namespace KisJPEGDestination
 {
 
 void setDestination(j_compress_ptr cinfo, QIODevice* destinationDevice)
 {
     if (cinfo->dest == 0) {
         cinfo->dest = (struct jpeg_destination_mgr *)
             (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_PERMANENT,
                                         sizeof(KisJPEGDestinationManager));
     }
 
     KisJPEGDestinationManagerPtr dest = (KisJPEGDestinationManagerPtr)cinfo->dest;
 
     dest->init_destination = init_destination;
     dest->empty_output_buffer = empty_output_buffer;
     dest->term_destination = term_destination;
     dest->output = destinationDevice;
 }
 
 }