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more hacking

This commit is contained in:
John Cupitt 2016-11-21 13:02:08 +00:00
parent 23e3fecdb0
commit f1e4416d6a
1 changed files with 55 additions and 4 deletions
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59
libvips/foreign/vips2tiff.c
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@ -302,6 +302,17 @@ struct _Write {
int rgbjpeg; /* True for RGB not YCbCr */
int properties; /* Set to save XML props */
int strip; /* Don't write metadata */
/* True if we've detected a toilet-roll image, plus the page height,
* which has been checked to be a factor of im->Ysize.
*/
gboolean toilet_roll;
int page_height;
/* The height of the TIFF we write. Equal to page_height in toilet
* roll mode.
*/
int image_height;
};
static Layer *
@ -894,15 +905,54 @@ write_new( VipsImage *im, const char *filename,
write->pyramid = pyramid;
write->onebit = squash;
write->miniswhite = miniswhite;
write->resunit = get_resunit( resunit );
write->xres = xres;
write->yres = yres;
write->icc_profile = vips_strdup( NULL, profile );
write->bigtiff = bigtiff;
write->rgbjpeg = rgbjpeg;
write->properties = properties;
write->strip = strip;
write->toilet_roll = FALSE;
write->page_height = -1;
write->resunit = get_resunit( resunit );
write->xres = xres;
write->yres = yres;
/* Updated below if we discover toilet roll mode.
*/
write->image_height = im->Ysize;
/* Check for a toilet roll image.
*/
if( vips_image_get_typeof( im, "page-height" ) &&
vips_image_get_int( im, "page-height", &write->page_height ) ) {
write_free( write );
return( NULL );
}
/* If page_height <= Ysize, treat as a single-page image.
*/
if( write->page_height > 0 &&
write->page_height < im->Ysize ) {
write->toilet_roll = TRUE;
write->image_height = write->page_height;
if( im->Ysize % write->page_height != 0 ) {
vips_error( "vips2tiff",
_( "image height %d is not a factor of "
"page-height %d" ),
im->Ysize, write->page_height );
write_free( write );
return( NULL );
}
/* We can't pyramid toilet roll images.
*/
if( write->pyramid ) {
vips_warn( "vips2tiff",
"%s", _( "can't pyramid multi page images --- "
"disabling pyramid" ) );
write->pyramid = FALSE;
}
}
/* In strip mode we use tileh to set rowsperstrip, and that does not
* have the multiple-of-16 restriction.
@ -970,7 +1020,8 @@ write_new( VipsImage *im, const char *filename,
/* Build the pyramid framework.
*/
write->layer = pyramid_new( write, NULL, im->Xsize, im->Ysize );
write->layer = pyramid_new( write, NULL,
im->Xsize, write->image_height );
/* Fill all the layers.
*/