Provided by: libtiff-dev_4.0.10+git191003-1_amd64 bug

NAME

       TIFFReadRGBAImage,  TIFFReadRGBAImageOriented  -  read  and  decode an image into a fixed-
       format raster

SYNOPSIS

       #include <tiffio.h>

       #define TIFFGetR(abgr) ((abgr) & 0xff)
       #define TIFFGetG(abgr) (((abgr) >> 8) & 0xff)
       #define TIFFGetB(abgr) (((abgr) >> 16) & 0xff)
       #define TIFFGetA(abgr) (((abgr) >> 24) & 0xff)

       int  TIFFReadRGBAImage(TIFF  *tif,  uint32  width,  uint32  height,  uint32  *raster,  int
       stopOnError)
       int  TIFFReadRGBAImageOriented(TIFF *tif, uint32 width, uint32 height, uint32 *raster, int
       orientation, int stopOnError)

DESCRIPTION

       TIFFReadRGBAImage reads a strip- or tile-based image into memory, storing  the  result  in
       the  user  supplied  raster.   The  raster is assumed to be an array of width times height
       32-bit entries, where width must be less than or equal to the width of the  image  (height
       may be any non-zero size).  If the raster dimensions are smaller than the image, the image
       data is cropped to the raster bounds.  If the raster height is greater than  that  of  the
       image,  then  the  image  data are placed in the lower part of the raster.  (Note that the
       raster  is  assume  to  be  organized  such  that  the  pixel   at   location   (x,y)   is
       raster[y*width+x]; with the raster origin in the lower-left hand corner.)

       TIFFReadRGBAImageOriented  works  like  TIFFReadRGBAImage  with  except  of  that user can
       specify the raster origin position  with  the  orientation  parameter.  Four  orientations
       supported:

       ORIENTATION_TOPLEFT
              origin in top-left corner,

       ORIENTATION_TOPRIGHT
              origin in top-right corner,

       ORIENTATION_BOTLEFT
              origin in bottom-left corner and

       ORIENTATION_BOTRIGHT
              origin in bottom-right corner.

       If   you   choose  ORIENTATION_BOTLEFT  result  will  be  the  same  as  returned  by  the
       TIFFReadRGBAImage.

       Raster pixels are 8-bit packed red, green, blue,  alpha  samples.   The  macros  TIFFGetR,
       TIFFGetG,  TIFFGetB,  and  TIFFGetA  should  be used to access individual samples.  Images
       without Associated Alpha matting information have a constant Alpha of 1.0 (255).

       TIFFReadRGBAImage converts non-8-bit images by scaling sample values.  Palette, grayscale,
       bilevel,  CMYK,  and  YCbCr  images are converted to RGB transparently.  Raster pixels are
       returned uncorrected by any colorimetry information present in the directory.

       The paramater stopOnError specifies how to act if an error is  encountered  while  reading
       the  image.   If  stopOnError  is  non-zero,  then  an error will terminate the operation;
       otherwise TIFFReadRGBAImage will continue processing data until all the possible  data  in
       the image have been requested.

NOTES

       In C++ the stopOnError parameter defaults to 0.

       Samples  must be either 1, 2, 4, 8, or 16 bits.  Colorimetric samples/pixel must be either
       1, 3, or 4 (i.e.  SamplesPerPixel minus ExtraSamples).

       Palettte image colormaps that appear  to  be  incorrectly  written  as  8-bit  values  are
       automatically scaled to 16-bits.

       TIFFReadRGBAImage   is  just  a  wrapper  around  the  more  general  TIFFRGBAImage(3TIFF)
       facilities.

RETURN VALUES

       1 is returned if the image was successfully read and converted.  Otherwise, 0 is  returned
       if an error was encountered and stopOnError is zero.

DIAGNOSTICS

       All error messages are directed to the TIFFError(3TIFF) routine.

       Sorry, can not handle %d-bit pictures.  The image had BitsPerSample other than 1, 2, 4, 8,
       or 16.

       Sorry, can not handle %d-channel images.  The image had SamplesPerPixel other than  1,  3,
       or 4.

       Missing  needed  "PhotometricInterpretation"  tag.   The  image  did  not  have a tag that
       describes how to display the data.

       No "PhotometricInterpretation" tag, assuming RGB.   The  image  was  missing  a  tag  that
       describes  how to display it, but because it has 3 or 4 samples/pixel, it is assumed to be
       RGB.

       No "PhotometricInterpretation" tag, assuming min-is-black.  The image was  missing  a  tag
       that describes how to display it, but because it has 1 sample/pixel, it is assumed to be a
       grayscale or bilevel image.

       No space for photometric conversion table.  There was insufficient memory for a table used
       to convert image samples to 8-bit RGB.

       Missing required "Colormap" tag.  A Palette image did not have a required Colormap tag.

       No space for tile buffer.  There was insufficient memory to allocate an i/o buffer.

       No space for strip buffer.  There was insufficient memory to allocate an i/o buffer.

       Can   not   handle  format.   The  image  has  a  format  (combination  of  BitsPerSample,
       SamplesPerPixel, and PhotometricInterpretation) that TIFFReadRGBAImage can not handle.

       No space for B&W mapping table.  There was insufficient memory to allocate a table used to
       map grayscale data to RGB.

       No  space  for  Palette  mapping table.  There was insufficient memory to allocate a table
       used to map data to 8-bit RGB.

SEE ALSO

       TIFFOpen(3TIFF), TIFFRGBAImage(3TIFF), TIFFReadRGBAStrip(3TIFF),  TIFFReadRGBATile(3TIFF),
       libtiff(3TIFF)

       Libtiff library home page: http://www.simplesystems.org/libtiff/