Ejemplo n.º 1
0
/******************************************************************************
 This routine should be called last, to close the GIF file.
******************************************************************************/
int
DGifCloseFile(GifFileType *GifFile, int *ErrorCode)
{
    GifFilePrivateType *Private;

    if (GifFile == NULL || GifFile->Private == NULL)
        return GIF_ERROR;

    if (GifFile->Image.ColorMap) {
        GifFreeMapObject(GifFile->Image.ColorMap);
        GifFile->Image.ColorMap = NULL;
    }

    if (GifFile->SColorMap) {
        GifFreeMapObject(GifFile->SColorMap);
        GifFile->SColorMap = NULL;
    }

    if (GifFile->SavedImages) {
        GifFreeSavedImages(GifFile);
        GifFile->SavedImages = NULL;
    }

    GifFreeExtensions(&GifFile->ExtensionBlockCount, &GifFile->ExtensionBlocks);

    Private = (GifFilePrivateType *) GifFile->Private;

    if (!IS_READABLE(Private)) {
        /* This file was NOT open for reading: */
	if (ErrorCode != NULL)
	    *ErrorCode = D_GIF_ERR_NOT_READABLE;
	free((char *)GifFile->Private);
	free(GifFile);
        return GIF_ERROR;
    }

    if (Private->File && (fclose(Private->File) != 0)) {
	if (ErrorCode != NULL)
	    *ErrorCode = D_GIF_ERR_CLOSE_FAILED;
	free((char *)GifFile->Private);
	free(GifFile);
        return GIF_ERROR;
    }

    free((char *)GifFile->Private);
    free(GifFile);
    if (ErrorCode != NULL)
	*ErrorCode = D_GIF_SUCCEEDED;
    return GIF_OK;
}
Ejemplo n.º 2
0
/******************************************************************************
 This routine should be called last, to close the GIF file.
******************************************************************************/
int
DGifCloseFile(GifFileType *GifFile)
{
    GifFilePrivateType *Private;

    if (GifFile == NULL || GifFile->Private == NULL)
        return GIF_ERROR;

    if (GifFile->Image.ColorMap) {
        GifFreeMapObject(GifFile->Image.ColorMap);
        GifFile->Image.ColorMap = NULL;
    }

    if (GifFile->SColorMap) {
        GifFreeMapObject(GifFile->SColorMap);
        GifFile->SColorMap = NULL;
    }

    if (GifFile->SavedImages) {
        GifFreeSavedImages(GifFile);
        GifFile->SavedImages = NULL;
    }

    GifFreeExtensions(&GifFile->ExtensionBlockCount, &GifFile->ExtensionBlocks);

    Private = (GifFilePrivateType *) GifFile->Private;

    if (!IS_READABLE(Private)) {
        /* This file was NOT open for reading: */
        GifFile->Error = D_GIF_ERR_NOT_READABLE;
        return GIF_ERROR;
    }

    if (Private->File && (fclose(Private->File) != 0)) {
        GifFile->Error = D_GIF_ERR_CLOSE_FAILED;
        return GIF_ERROR;
    }

    free((char *)GifFile->Private);

    /* 
     * Without the #ifndef, we get spurious warnings because Coverity mistakenly
     * thinks the GIF structure is freed on an error return. 
     */
#ifndef __COVERITY__
    free(GifFile);
#endif /* __COVERITY__ */

    return GIF_OK;
}
Ejemplo n.º 3
0
bool compress_custom(void* input_data, InputFunc input_func,
    void* output_data, OutputFunc output_func, int sample_size)
{
  GifFileType* input_gif = NULL;
  GifFileType* output_gif = NULL;
  int result = GIF_ERROR;

  // Check sample
  if (sample_size <= 0) {
    return false;
  }

  input_gif = DGifOpen(input_data, input_func, &error_code);
  if (input_gif == NULL) {
    LOGE(EMSG("Can't open input gif"));
    return false;
  }

  DGifSlurp(input_gif);

  if (input_gif->ImageCount == 0) {
    LOGE(EMSG("Gif frame count is 0"));
    DGifCloseFile(input_gif, &error_code);
    return false;
  }

  // Save gif
  output_gif = EGifOpen(output_data, output_func, &error_code);
  if (output_gif == NULL) {
    LOGE(EMSG("Can't open output gif"));
    DGifCloseFile(input_gif, &error_code);
    return false;
  }

  if (do_compress(input_gif, output_gif, sample_size)) {
    result = EGifSpew(output_gif);
  }

  // Free
  GifFreeExtensions(&output_gif->ExtensionBlockCount, &output_gif->ExtensionBlocks);
  if (output_gif->SavedImages) {
    GifFreeSavedImages(output_gif);
    output_gif->SavedImages = NULL;
  }

  // Close gif
  DGifCloseFile(input_gif, &error_code);

  return result == GIF_OK;
}