/*!
* pixReadStreamWebP()
*
* Input: stream corresponding to WebP image
* Return: pix (32 bpp), or null on error
*/
PIX *
pixReadStreamWebP(FILE *fp)
{
l_uint8 *filedata;
size_t filesize;
PIX *pix;
PROCNAME("pixReadStreamWebP");
if (!fp)
return (PIX *)ERROR_PTR("fp not defined", procName, NULL);
/* Read data from file and decode into Y,U,V arrays */
rewind(fp);
if ((filedata = l_binaryReadStream(fp, &filesize)) == NULL)
return (PIX *)ERROR_PTR("filedata not read", procName, NULL);
pix = pixReadMemWebP(filedata, filesize);
FREE(filedata);
return pix;
}
/*!
* pixReadMem()
*
* Input: data (const; encoded)
* datasize (size of data)
* Return: pix, or null on error
*
* Notes:
* (1) This is a variation of pixReadStream(), where the data is read
* from a memory buffer rather than a file.
* (2) On windows, this only reads tiff formatted files directly from
* memory. For other formats, it write to a temp file and
* decompress from file.
* (3) findFileFormatBuffer() requires up to 8 bytes to decide on
* the format. That determines the constraint here. But in
* fact the data must contain the entire compressed string for
* the image.
*/
PIX *
pixReadMem(const l_uint8 *data,
size_t size)
{
l_int32 format;
PIX *pix;
PROCNAME("pixReadMem");
if (!data)
return (PIX *)ERROR_PTR("data not defined", procName, NULL);
if (size < 8)
return (PIX *)ERROR_PTR("size < 8", procName, NULL);
pix = NULL;
findFileFormatBuffer(data, &format);
switch (format)
{
case IFF_BMP:
if ((pix = pixReadMemBmp(data, size)) == NULL )
return (PIX *)ERROR_PTR( "bmp: no pix returned", procName, NULL);
break;
case IFF_JFIF_JPEG:
if ((pix = pixReadMemJpeg(data, size, READ_24_BIT_COLOR, 1, NULL, 0))
== NULL)
return (PIX *)ERROR_PTR( "jpeg: no pix returned", procName, NULL);
break;
case IFF_PNG:
if ((pix = pixReadMemPng(data, size)) == NULL)
return (PIX *)ERROR_PTR("png: no pix returned", procName, NULL);
break;
case IFF_TIFF:
case IFF_TIFF_PACKBITS:
case IFF_TIFF_RLE:
case IFF_TIFF_G3:
case IFF_TIFF_G4:
case IFF_TIFF_LZW:
case IFF_TIFF_ZIP:
/* Reading page 0 by default */
if ((pix = pixReadMemTiff(data, size, 0)) == NULL)
return (PIX *)ERROR_PTR("tiff: no pix returned", procName, NULL);
break;
case IFF_PNM:
if ((pix = pixReadMemPnm(data, size)) == NULL)
return (PIX *)ERROR_PTR("pnm: no pix returned", procName, NULL);
break;
case IFF_GIF:
if ((pix = pixReadMemGif(data, size)) == NULL)
return (PIX *)ERROR_PTR("gif: no pix returned", procName, NULL);
break;
case IFF_JP2:
if ((pix = pixReadMemJp2k(data, size, 1, NULL, 0)) == NULL)
return (PIX *)ERROR_PTR("jp2k: no pix returned", procName, NULL);
break;
case IFF_WEBP:
if ((pix = pixReadMemWebP(data, size)) == NULL)
return (PIX *)ERROR_PTR("webp: no pix returned", procName, NULL);
break;
case IFF_SPIX:
if ((pix = pixReadMemSpix(data, size)) == NULL)
return (PIX *)ERROR_PTR("spix: no pix returned", procName, NULL);
break;
case IFF_UNKNOWN:
return (PIX *)ERROR_PTR("Unknown format: no pix returned",
procName, NULL);
break;
}
/* Set the input format. For tiff reading from memory we lose
* the actual input format; for 1 bpp, default to G4. */
if (pix) {
if (format == IFF_TIFF && pixGetDepth(pix) == 1)
format = IFF_TIFF_G4;
pixSetInputFormat(pix, format);
}
return pix;
}