adjust formatting of 2, 4 bit tiff load/save
To make it libvipsey. Small fixes as well.
This commit is contained in:
John Cupitt
parent
63b8e162f8
commit
8b469b4516
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@ -31,6 +31,8 @@
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- deprecate heifload autorotate -- it's now always on
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- revised resize improves accuracy [kleisauke]
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- add --vips-config flag to show configuration info
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- add "bitdepth" param to tiff load and save, deprecate "squash" [MathemanFlo]
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- tiff load and save now supports 2 and 4 bit data [MathemanFlo]
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24/4/20 started 8.9.3
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- better iiif tile naming [IllyaMoskvin]
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@ -199,8 +199,8 @@
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* - better handling of aligned reads in multipage tiffs
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* 28/5/20
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* - add subifd
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* 06/6/20
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* - add load functionality for 2 and 4 bit greyscale tiffs
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* 06/6/20 MathemanFlo
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* - support 2 and 4 bit greyscale load
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*/
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/*
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@ -1026,14 +1026,13 @@ rtiff_onebit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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{
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int photometric_interpretation =
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rtiff->header.photometric_interpretation;
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int x, i, z;
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VipsPel bits;
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int black = photometric_interpretation == PHOTOMETRIC_MINISBLACK ?
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0 : 255;
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int white = black ^ 0xff;
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int x, i, z;
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VipsPel bits;
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/* (sigh) how many times have I written this?
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*/
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x = 0;
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@ -1051,6 +1050,7 @@ rtiff_onebit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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*/
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if( n & 7 ) {
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bits = p[i];
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for( z = 0; z < (n & 7); z++ ) {
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q[x + z] = (bits & 128) ? white : black;
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bits <<= 1;
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@ -1063,9 +1063,11 @@ rtiff_onebit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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static void
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rtiff_twobit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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{
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int photometric_interpretation =
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rtiff->header.photometric_interpretation;
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int minisblack = photometric_interpretation == PHOTOMETRIC_MINISBLACK;
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int x, i, z;
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int minisblack =
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rtiff->header.photometric_interpretation == PHOTOMETRIC_MINISBLACK;
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VipsPel twobits, fourbits, bits;
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x = 0;
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@ -1073,7 +1075,8 @@ rtiff_twobit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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bits = (VipsPel) minisblack ? p[i] : ~p[i];
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for( z = 0; z < 4; z++ ) {
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/* The grey shade is the value four times concatenated */
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/* The grey shade is the value four times concatenated.
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*/
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twobits = bits >> 6;
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fourbits = twobits | (twobits << 2);
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q[x] = fourbits | (fourbits << 4);
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@ -1086,7 +1089,8 @@ rtiff_twobit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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*/
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if( n & 3 ) {
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bits = (VipsPel) minisblack ? p[i] : ~p[i];
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for( z = 0; z < (n & 3) ; z++ ) {
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for( z = 0; z < (n & 3); z++ ) {
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twobits = bits >> 6;
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fourbits = twobits | (twobits << 2);
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q[x + z] = fourbits | (fourbits << 4);
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@ -1100,18 +1104,20 @@ rtiff_twobit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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static void
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rtiff_fourbit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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{
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int photometric_interpretation =
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rtiff->header.photometric_interpretation;
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int minisblack = photometric_interpretation == PHOTOMETRIC_MINISBLACK;
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int x, i, z;
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int minisblack =
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rtiff->header.photometric_interpretation == PHOTOMETRIC_MINISBLACK;
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VipsPel bits;
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x = 0;
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for( i = 0; i < (n >> 1); i++ ) {
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bits = (VipsPel) minisblack ? p[i] : ~p[i];
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for( z = 0; z < 2; z++ ) {
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/* The grey shade is the value two times concatenated */
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/* The grey shade is the value two times concatenated.
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*/
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q[x] = (bits & 0xF0) | (bits >> 4);
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bits <<= 4;
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x += 1;
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@ -1119,10 +1125,10 @@ rtiff_fourbit_line( Rtiff *rtiff, VipsPel *q, VipsPel *p, int n, void *flg )
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}
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/* Do last byte in line.
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*/
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if( n & 1) {
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*/
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if( n & 1 ) {
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bits = (VipsPel) minisblack ? p[i] : ~p[i];
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for( z = 0; z < (n & 1) ; z++ ) {
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for( z = 0; z < (n & 1); z++ ) {
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q[x + z] = (bits & 0xF0) | (bits >> 4);
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bits <<= 4;
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}
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@ -25,6 +25,7 @@
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* - add "subifd" to create pyr layers as sub-directories
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* 8/6/20
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* - add bitdepth support for 2 and 4 bit greyscale images
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* - deprecate "squash"
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*/
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/*
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@ -263,20 +264,6 @@ vips_foreign_save_tiff_class_init( VipsForeignSaveTiffClass *class )
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G_STRUCT_OFFSET( VipsForeignSaveTiff, pyramid ),
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FALSE );
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VIPS_ARG_BOOL( class, "squash", 14,
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_( "Squash" ),
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_( "Squash images down to 1 bit" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT | VIPS_ARGUMENT_DEPRECATED,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, squash ),
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FALSE );
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VIPS_ARG_INT( class, "bitdepth", 14,
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_( "bitdepth" ),
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_( "Change greyscale image bit depth to 1,2, 4 or 8." ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, bitdepth ),
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1,8,8 );
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VIPS_ARG_BOOL( class, "miniswhite", 14,
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_( "Miniswhite" ),
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_( "Use 0 for white in 1-bit images" ),
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@ -284,41 +271,41 @@ vips_foreign_save_tiff_class_init( VipsForeignSaveTiffClass *class )
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G_STRUCT_OFFSET( VipsForeignSaveTiff, miniswhite ),
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FALSE );
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VIPS_ARG_ENUM( class, "resunit", 15,
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VIPS_ARG_INT( class, "bitdepth", 15,
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_( "bitdepth" ),
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_( "Write as a 1, 2, 4 or 8 bit image" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, bitdepth ),
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0, 8, 0 );
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VIPS_ARG_ENUM( class, "resunit", 16,
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_( "Resolution unit" ),
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_( "Resolution unit" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, resunit ),
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VIPS_TYPE_FOREIGN_TIFF_RESUNIT, VIPS_FOREIGN_TIFF_RESUNIT_CM );
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VIPS_ARG_DOUBLE( class, "xres", 16,
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VIPS_ARG_DOUBLE( class, "xres", 17,
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_( "Xres" ),
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_( "Horizontal resolution in pixels/mm" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, xres ),
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0.001, 1000000, 1 );
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VIPS_ARG_DOUBLE( class, "yres", 17,
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VIPS_ARG_DOUBLE( class, "yres", 18,
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_( "Yres" ),
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_( "Vertical resolution in pixels/mm" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, yres ),
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0.001, 1000000, 1 );
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VIPS_ARG_BOOL( class, "bigtiff", 18,
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VIPS_ARG_BOOL( class, "bigtiff", 19,
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_( "Bigtiff" ),
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_( "Write a bigtiff image" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, bigtiff ),
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FALSE );
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VIPS_ARG_BOOL( class, "rgbjpeg", 20,
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_( "RGB JPEG" ),
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_( "Output RGB JPEG rather than YCbCr" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT | VIPS_ARGUMENT_DEPRECATED,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, rgbjpeg ),
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FALSE );
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VIPS_ARG_BOOL( class, "properties", 21,
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_( "Properties" ),
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_( "Write a properties document to IMAGEDESCRIPTION" ),
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@ -361,6 +348,20 @@ vips_foreign_save_tiff_class_init( VipsForeignSaveTiffClass *class )
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G_STRUCT_OFFSET( VipsForeignSaveTiff, subifd ),
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FALSE );
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VIPS_ARG_BOOL( class, "rgbjpeg", 20,
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_( "RGB JPEG" ),
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_( "Output RGB JPEG rather than YCbCr" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT | VIPS_ARGUMENT_DEPRECATED,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, rgbjpeg ),
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FALSE );
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VIPS_ARG_BOOL( class, "squash", 14,
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_( "Squash" ),
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_( "Squash images down to 1 bit" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT | VIPS_ARGUMENT_DEPRECATED,
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G_STRUCT_OFFSET( VipsForeignSaveTiff, squash ),
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FALSE );
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}
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static void
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@ -403,10 +404,12 @@ vips_foreign_save_tiff_file_build( VipsObject *object )
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build( object ) )
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return( -1 );
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/* handle the deprecated squash parameter */
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if( vips_object_argument_isset(object,"squash") ) {
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tiff->bitdepth = 1; /*we set that even in the case of LAB to LABQ */
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}
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/* Handle the deprecated squash parameter.
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*/
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if( vips_object_argument_isset( object, "squash" ) )
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/* We set that even in the case of LAB to LABQ.
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*/
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tiff->bitdepth = 1;
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if( vips__tiff_write( save->ready, file->filename,
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tiff->compression, tiff->Q, tiff->predictor,
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@ -555,7 +558,6 @@ vips_foreign_save_tiff_buffer_init( VipsForeignSaveTiffBuffer *buffer )
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* * @tile_width: %gint for tile size
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* * @tile_height: %gint for tile size
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* * @pyramid: %gboolean, write an image pyramid
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* * @squash: %gboolean, squash 8-bit images down to 1 bit
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* * @bitdepth: %int, change bit depth to 1,2, or 4 bit
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* * @miniswhite: %gboolean, write 1-bit images as MINISWHITE
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* * @resunit: #VipsForeignTiffResunit for resolution unit
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@ -583,7 +585,7 @@ vips_foreign_save_tiff_buffer_init( VipsForeignSaveTiffBuffer *buffer )
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* can do.
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*
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* XYZ images are automatically saved as libtiff LOGLUV with SGILOG compression.
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* Float LAB images are saved as float CIELAB. Set @squash to save as 8-bit
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* Float LAB images are saved as float CIELAB. Set @bitdepth to save as 8-bit
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* CIELAB.
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*
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* Use @Q to set the JPEG compression factor. Default 75.
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@ -617,16 +619,7 @@ vips_foreign_save_tiff_buffer_init( VipsForeignSaveTiffBuffer *buffer )
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* tile. Use @depth to stop when the image fits in one pixel, or to only write
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* a single layer.
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*
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* Set @squash to make 8-bit uchar images write as 1-bit TIFFs. Values >128
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* are written as white, values <=128 as black. Normally vips will write
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* MINISBLACK TIFFs where black is a 0 bit, but if you set @miniswhite, it
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* will use 0 for a white bit. Many pre-press applications only work with
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* images which use this sense. @miniswhite only affects one-bit images, it
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* does nothing for greyscale images. Consider @bitdepth for depths 1, 2 and 4.
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*
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* Set @squash to squash 3-band float CIELAB images down to 8-bit CIELAB.
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*
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* Set @bitdepth to make 8-bit uchar images write as 1,2 or 4-bit TIFFs.
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* Set @bitdepth to save 8-bit uchar images as 1, 2 or 4-bit TIFFs.
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* In case of depth 1: Values >128 are written as white, values <=128 as black.
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* Normally vips will write MINISBLACK TIFFs where black is a 0 bit, but if you
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* set @miniswhite, it will use 0 for a white bit. Many pre-press applications
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@ -639,8 +632,6 @@ vips_foreign_save_tiff_buffer_init( VipsForeignSaveTiffBuffer *buffer )
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* In case of depth 4: values < 16 are written as black, and so on for the
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* lighter shades. In case @miniswhite is set to true this behavior is inverted.
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*
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* Set @bitdepth to 8 to squash 3-band float CIELAB images down to 8-bit CIELAB.
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*
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* Use @resunit to override the default resolution unit.
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* The default
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* resolution unit is taken from the header field
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@ -704,8 +695,7 @@ vips_tiffsave( VipsImage *in, const char *filename, ... )
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* * @tile_width: %gint for tile size
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* * @tile_height: %gint for tile size
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* * @pyramid: %gboolean, write an image pyramid
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* * @squash: %gboolean, squash 8-bit images down to 1 bit
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* * @bitdepth: %int, change bit depth to 1,2 or 4-bit or squash float to 8 bit
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* * @bitdepth: %int, set write bit depth to 1, 2, 4 or 8
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* * @miniswhite: %gboolean, write 1-bit images as MINISWHITE
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* * @resunit: #VipsForeignTiffResunit for resolution unit
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* * @xres: %gdouble horizontal resolution in pixels/mm
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@ -195,9 +195,10 @@
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* - add PAGENUMBER support
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* 23/5/20
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* - add support for subifd pyramid layers
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* 8/6/20
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* 06/6/20 MathemanFlo
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* - add bitdepth support for 2 and 4 bit greyscale images
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*/
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/*
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This file is part of VIPS.
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@ -1190,30 +1191,34 @@ wtiff_new( VipsImage *input, const char *filename,
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}
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}
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if( wtiff->bitdepth && !(wtiff->bitdepth == 1 || wtiff->bitdepth == 2
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|| wtiff->bitdepth == 4) ) {
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g_warning( "%s",
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_( "allows only bitdepth values 1,2 or 4. "
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"-- disabling bitdepth") );
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wtiff->bitdepth = 0;
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}
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/* Can only have byte fractional bit depths for 8 bit mono.
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* 3-band float should have been packed above.
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/* Depth 8 is handled above.
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*/
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if( wtiff->bitdepth && !(wtiff->ready->Coding == VIPS_CODING_NONE &&
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wtiff->ready->BandFmt == VIPS_FORMAT_UCHAR &&
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wtiff->ready->Bands == 1) ) {
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if( wtiff->bitdepth &&
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!(wtiff->bitdepth == 1 ||
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wtiff->bitdepth == 2 ||
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wtiff->bitdepth == 4) ) {
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g_warning( "%s",
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( "can only set bitdepth for 1-band uchar and "
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"3-band float lab -- disabling bitdepth" ) );
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wtiff->bitdepth = 0;
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_( "bitdepth 1, 2 or 4 only -- disabling bitdepth") );
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wtiff->bitdepth = 0;
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}
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if( wtiff->bitdepth &&
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/* Can only have byte fractional bit depths for 8 bit mono.
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* 3-band float should have been packed above.
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*/
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if( wtiff->bitdepth &&
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!(wtiff->ready->Coding == VIPS_CODING_NONE &&
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wtiff->ready->BandFmt == VIPS_FORMAT_UCHAR &&
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wtiff->ready->Bands == 1) ) {
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g_warning( "%s",
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( "can only set bitdepth for 1-band uchar and "
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"3-band float lab -- disabling bitdepth" ) );
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wtiff->bitdepth = 0;
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}
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if( wtiff->bitdepth &&
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wtiff->compression == COMPRESSION_JPEG ) {
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g_warning( "%s",
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_( "can't have 1,2 or 4-bit JPEG -- disabling JPEG" ) );
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_( "can't have <8 bit JPEG -- disabling JPEG" ) );
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wtiff->compression = COMPRESSION_NONE;
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}
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@ -1285,14 +1290,14 @@ LabQ2LabC( VipsPel *q, VipsPel *p, int n )
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static void
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eightbit2onebit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
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{
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int x;
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VipsPel bits;
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/* Invert in miniswhite mode.
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*/
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int white = wtiff->miniswhite ? 0 : 1;
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int black = white ^ 1;
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int x;
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VipsPel bits;
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bits = 0;
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for( x = 0; x < n; x++ ) {
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bits <<= 1;
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@ -1318,12 +1323,12 @@ eightbit2onebit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
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static void
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eightbit2twobit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
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{
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int x;
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VipsPel bits;
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VipsPel mask = wtiff->miniswhite ? 3 : 0;
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int x;
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VipsPel bits;
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bits = 0;
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for( x = 0; x < n; x++ ) {
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bits <<= 2;
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bits |= (p[x] >> 6) ^ mask;
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@ -1335,9 +1340,9 @@ eightbit2twobit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
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}
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/* Any left-over bits? Need to be left-aligned.
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*/
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||||
*/
|
||||
if( (x & 0x3) != 0 )
|
||||
*q++ = (wtiff->miniswhite ? ~bits : bits) << (8 - ((x & 0x3) << 1));
|
||||
*q++ = bits << (8 - ((x & 0x3) << 1));
|
||||
}
|
||||
|
||||
/* Pack 8 bit VIPS to 4 bit TIFF.
|
||||
|
|
@ -1345,26 +1350,26 @@ eightbit2twobit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
|
|||
static void
|
||||
eightbit2fourbit( Wtiff *wtiff, VipsPel *q, VipsPel *p, int n )
|
||||
{
|
||||
int x;
|
||||
VipsPel bits;
|
||||
VipsPel mask = wtiff->miniswhite ? 15 : 0;
|
||||
bits = 0;
|
||||
VipsPel mask = wtiff->miniswhite ? 0xf : 0;
|
||||
|
||||
VipsPel bits;
|
||||
int x;
|
||||
|
||||
bits = 0;
|
||||
for( x = 0; x < n; x++ ) {
|
||||
bits <<= 4;
|
||||
bits |= (p[x] >> 4) ^ mask;
|
||||
|
||||
if( (x & 0x1) == 0x1 ) {
|
||||
*q++ = bits;
|
||||
bits = 0;
|
||||
*q++ = bits;
|
||||
bits = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Any left-over bits? Need to be left-aligned.
|
||||
*/
|
||||
if( (x & 0x1) != 0 )
|
||||
*q++ = ((VipsPel)(wtiff->miniswhite ? ~bits : bits))
|
||||
<< (8 - ((x & 0x1) << 2));
|
||||
/* Any left-over bits? Need to be left-aligned.
|
||||
*/
|
||||
if( (x & 0x1) != 0 )
|
||||
*q++ = bits << (8 - ((x & 0x1) << 2));
|
||||
}
|
||||
|
||||
/* Swap the sense of the first channel, if necessary.
|
||||
|
|
|
|||
Loading…
Reference in New Issue