/* Call im_extract_bands via arg vector.
*/
static int
extract_bands_vec( im_object *argv )
{
int chsel = *((int *) argv[2]);
int nbands = *((int *) argv[3]);
return( im_extract_bands( argv[0], argv[1], chsel, nbands ) );
}
/**
* im_tone_map:
* @in: input image
* @out: output image
* @lut: look-up table
*
* Map the first channel of @in through @lut. If @in is IM_CODING_LABQ, unpack
* to LABS, map L and then repack.
*
* @in should be a LABS or LABQ image for this to work
* sensibly.
*
* See also: im_maplut().
*
* Returns: 0 on success, -1 on error
*/
int
im_tone_map( IMAGE *in, IMAGE *out, IMAGE *lut )
{
IMAGE *t[8];
if( im_check_hist( "im_tone_map", lut ) ||
im_open_local_array( out, t, 8, "im_tone_map", "p" ) )
return( -1 );
/* If in is IM_CODING_LABQ, unpack.
*/
if( in->Coding == IM_CODING_LABQ ) {
if( im_LabQ2LabS( in, t[0] ) )
return( -1 );
}
else
t[0] = in;
/* Split into bands.
*/
if( im_extract_band( t[0], t[1], 0 ) )
return( -1 );
if( t[0]->Bands > 1 ) {
if( im_extract_bands( t[0], t[2], 1, t[0]->Bands - 1 ) )
return( -1 );
}
/* Map L.
*/
if( im_maplut( t[1], t[3], lut ) )
return( -1 );
/* Recombine bands.
*/
if( t[0]->Bands > 1 ) {
if( im_bandjoin( t[3], t[2], t[4] ) )
return( -1 );
}
else
t[4] = t[3];
/* If input was LabQ, repack.
*/
if( in->Coding == IM_CODING_LABQ ) {
if( im_LabS2LabQ( t[4], t[5] ) )
return( -1 );
}
else
t[5] = t[4];
return( im_copy( t[4], out ) );
}
/* Convert to a saveable format.
*
* im__saveable_t gives the general type of image
* we make: vanilla 1/3 bands (eg. PPM), with an optional alpha (eg. PNG), or
* with CMYK as an option (eg. JPEG).
*
* format_table[] says how to convert each input format.
*
* Need to im_close() the result IMAGE.
*/
IMAGE *
im__convert_saveable( IMAGE *in,
im__saveable_t saveable, int format_table[10] )
{
IMAGE *out;
if( !(out = im_open( "convert-for-save", "p" )) )
return( NULL );
/* If this is an IM_CODING_LABQ, we can go straight to RGB.
*/
if( in->Coding == IM_CODING_LABQ ) {
IMAGE *t = im_open_local( out, "conv:1", "p" );
static void *table = NULL;
/* Make sure fast LabQ2disp tables are built. 7 is sRGB.
*/
if( !table )
table = im_LabQ2disp_build_table( NULL,
im_col_displays( 7 ) );
if( !t || im_LabQ2disp_table( in, t, table ) ) {
im_close( out );
return( NULL );
}
in = t;
}
/* If this is an IM_CODING_RAD, we go to float RGB or XYZ. We should
* probably un-gamma-correct the RGB :(
*/
if( in->Coding == IM_CODING_RAD ) {
IMAGE *t;
if( !(t = im_open_local( out, "conv:1", "p" )) ||
im_rad2float( in, t ) ) {
im_close( out );
return( NULL );
}
in = t;
}
/* Get the bands right.
*/
if( in->Coding == IM_CODING_NONE ) {
if( in->Bands == 2 && saveable != IM__RGBA ) {
IMAGE *t = im_open_local( out, "conv:1", "p" );
if( !t || im_extract_band( in, t, 0 ) ) {
im_close( out );
return( NULL );
}
in = t;
}
else if( in->Bands > 3 && saveable == IM__RGB ) {
IMAGE *t = im_open_local( out, "conv:1", "p" );
if( !t ||
im_extract_bands( in, t, 0, 3 ) ) {
im_close( out );
return( NULL );
}
in = t;
}
else if( in->Bands > 4 &&
(saveable == IM__RGB_CMYK || saveable == IM__RGBA) ) {
IMAGE *t = im_open_local( out, "conv:1", "p" );
if( !t ||
im_extract_bands( in, t, 0, 4 ) ) {
im_close( out );
return( NULL );
}
in = t;
}
/* Else we have saveable IM__ANY and we don't chop bands down.
*/
}
/* Interpret the Type field for colorimetric images.
*/
if( in->Bands == 3 && in->BandFmt == IM_BANDFMT_SHORT &&
in->Type == IM_TYPE_LABS ) {
IMAGE *t = im_open_local( out, "conv:1", "p" );
if( !t || im_LabS2LabQ( in, t ) ) {
im_close( out );
return( NULL );
}
in = t;
}
if( in->Coding == IM_CODING_LABQ ) {
IMAGE *t = im_open_local( out, "conv:1", "p" );
if( !t || im_LabQ2Lab( in, t ) ) {
im_close( out );
return( NULL );
}
in = t;
}
if( in->Coding != IM_CODING_NONE ) {
im_close( out );
return( NULL );
}
if( in->Bands == 3 && in->Type == IM_TYPE_LCH ) {
IMAGE *t[2];
if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
im_LCh2Lab( t[0], t[1] ) ) {
im_close( out );
return( NULL );
}
in = t[1];
}
if( in->Bands == 3 && in->Type == IM_TYPE_YXY ) {
IMAGE *t[2];
if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
im_Yxy2XYZ( t[0], t[1] ) ) {
im_close( out );
return( NULL );
}
in = t[1];
}
if( in->Bands == 3 && in->Type == IM_TYPE_UCS ) {
IMAGE *t[2];
if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
im_UCS2XYZ( t[0], t[1] ) ) {
im_close( out );
return( NULL );
}
in = t[1];
}
if( in->Bands == 3 && in->Type == IM_TYPE_LAB ) {
IMAGE *t[2];
if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
im_Lab2XYZ( t[0], t[1] ) ) {
im_close( out );
return( NULL );
}
in = t[1];
}
if( in->Bands == 3 && in->Type == IM_TYPE_XYZ ) {
IMAGE *t[2];
if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
im_XYZ2disp( t[0], t[1], im_col_displays( 7 ) ) ) {
im_close( out );
return( NULL );
}
in = t[1];
}
/* Cast to the output format.
*/
{
IMAGE *t = im_open_local( out, "conv:1", "p" );
if( !t || im_clip2fmt( in, t, format_table[in->BandFmt] ) ) {
im_close( out );
return( NULL );
}
in = t;
}
if( im_copy( in, out ) ) {
im_close( out );
return( NULL );
}
return( out );
}