/**
* im_vips2raw:
* @in: image to save
* @fd: file descriptor to write to
*
* Writes the pixels in @in to the file descriptor. It's handy for writing
* writers for other formats.
*
* See also: #VipsFormat, im_raw2vips().
*
* Returns: 0 on success, -1 on error.
*/
int
im_vips2raw( IMAGE *in, int fd )
{
Write *write;
if( im_pincheck( in ) || !(write = write_new( in, fd )) )
return( -1 );
if( vips_sink_disc( in, write_block, write ) ) {
write_destroy( write );
return( -1 );
}
write_destroy( write );
return( 0 );
}
int
vips__fits_write( VipsImage *in, const char *filename )
{
VipsFits *fits;
VIPS_DEBUG_MSG( "vips2fits: writing \"%s\"\n", filename );
if( !(fits = vips_fits_new_write( in, filename )) )
return( -1 );
if( vips_fits_set_header( fits, fits->image ) ||
vips_sink_disc( fits->image, vips_fits_write, fits ) ) {
vips_fits_close( fits );
return( -1 );
}
vips_fits_close( fits );
return( 0 );
}
/**
* im_generate:
* @im: generate this image
* @start: start sequences with this function
* @generate: generate pixels with this function
* @stop: stop sequences with this function
* @a: user data
* @b: user data
*
* Generates an image. The action depends on the image type.
*
* For images opened with "p", im_generate() just attaches the
* start/generate/stop callbacks and returns.
*
* For "t" images, memory is allocated for the whole image and it is entirely
* generated using vips_sink().
*
* For "w" images, memory for a few scanlines is allocated and
* vips_sink_disc() used to generate the image in small chunks. As each
* chunk is generated, it is written to disc.
*
* See also: vips_sink(), im_open(), im_prepare(), im_wrapone().
*
* Returns: 0 on success, or -1 on error.
*/
int
im_generate( IMAGE *im,
im_start_fn start, im_generate_fn generate, im_stop_fn stop,
void *a, void *b )
{
int res;
g_assert( !im_image_sanity( im ) );
if( !im->hint_set ) {
im_error( "im_generate",
"%s", _( "im_demand_hint() not set" ) );
return( -1 );
}
if( im->Xsize <= 0 || im->Ysize <= 0 || im->Bands <= 0 ) {
im_error( "im_generate",
"%s", _( "bad dimensions" ) );
return( -1 );
}
/* We don't use this, but make sure it's set in case any old binaries
* are expectiing it.
*/
im->Bbits = im_bits_of_fmt( im->BandFmt );
/* Look at output type to decide our action.
*/
switch( im->dtype ) {
case IM_PARTIAL:
/* Output to partial image. Just attach functions and return.
*/
if( im->generate || im->start || im->stop ) {
im_error( "im_generate",
"%s", _( "func already attached" ) );
return( -1 );
}
im->start = start;
im->generate = generate;
im->stop = stop;
im->client1 = a;
im->client2 = b;
#ifdef DEBUG_IO
printf( "im_generate: attaching partial callbacks\n" );
#endif /*DEBUG_IO*/
break;
case IM_SETBUF:
case IM_SETBUF_FOREIGN:
case IM_MMAPINRW:
case IM_OPENOUT:
/* Eval now .. sanity check.
*/
if( im->generate || im->start || im->stop ) {
im_error( "im_generate",
"%s", _( "func already attached" ) );
return( -1 );
}
/* Get output ready.
*/
if( im_setupout( im ) )
return( -1 );
/* Attach callbacks.
*/
im->start = start;
im->generate = generate;
im->stop = stop;
im->client1 = a;
im->client2 = b;
if( im->dtype == IM_OPENOUT )
res = vips_sink_disc( im,
(VipsRegionWrite) write_vips, NULL );
else
res = vips_sink_memory( im );
/* Error?
*/
if( res )
return( -1 );
break;
default:
/* Not a known output style.
*/
im_error( "im_generate", _( "unable to output to a %s image" ),
im_dtype2char( im->dtype ) );
return( -1 );
}
/* Successful write: trigger "written".
*/
if( im__trigger_callbacks( im->writtenfns ) )
return( -1 );
return( 0 );
}
static int
write_ppm( Write *write, int ascii )
{
VipsImage *in = write->in;
char *magic;
time_t timebuf;
if( in->BandFmt == VIPS_FORMAT_FLOAT && in->Bands == 3 )
magic = "PF";
else if( in->BandFmt == VIPS_FORMAT_FLOAT && in->Bands == 1 )
magic = "Pf";
else if( in->Bands == 1 && ascii )
magic = "P2";
else if( in->Bands == 1 && !ascii )
magic = "P5";
else if( in->Bands == 3 && ascii )
magic = "P3";
else if( in->Bands == 3 && !ascii )
magic = "P6";
else
g_assert( 0 );
fprintf( write->fp, "%s\n", magic );
time( &timebuf );
fprintf( write->fp, "#vips2ppm - %s\n", ctime( &timebuf ) );
fprintf( write->fp, "%d %d\n", in->Xsize, in->Ysize );
switch( in->BandFmt ) {
case VIPS_FORMAT_UCHAR:
fprintf( write->fp, "%d\n", UCHAR_MAX );
break;
case VIPS_FORMAT_USHORT:
fprintf( write->fp, "%d\n", USHRT_MAX );
break;
case VIPS_FORMAT_UINT:
fprintf( write->fp, "%d\n", UINT_MAX );
break;
case VIPS_FORMAT_FLOAT:
{
double scale;
if( vips_image_get_double( in, "pfm-scale", &scale ) )
scale = 1;
if( !vips_amiMSBfirst() )
scale *= -1;
fprintf( write->fp, "%g\n", scale );
}
break;
default:
g_assert( 0 );
}
write->fn = ascii ? write_ppm_line_ascii : write_ppm_line_binary;
if( vips_sink_disc( write->in, write_ppm_block, write ) )
return( -1 );
return( 0 );
}
/* Write a VIPS image to PNG.
*/
static int
write_vips( Write *write,
int compress, int interlace, const char *profile,
VipsForeignPngFilter filter, gboolean strip )
{
VipsImage *in = write->in;
int bit_depth;
int color_type;
int interlace_type;
int i, nb_passes;
g_assert( in->BandFmt == VIPS_FORMAT_UCHAR ||
in->BandFmt == VIPS_FORMAT_USHORT );
g_assert( in->Coding == VIPS_CODING_NONE );
g_assert( in->Bands > 0 && in->Bands < 5 );
/* Catch PNG errors.
*/
if( setjmp( png_jmpbuf( write->pPng ) ) )
return( -1 );
/* Check input image. If we are writing interlaced, we need to make 7
* passes over the image. We advertise ourselves as seq, so to ensure
* we only suck once from upstream, switch to WIO.
*/
if( interlace ) {
if( !(write->memory = vips_image_copy_memory( in )) )
return( -1 );
in = write->memory;
}
else {
if( vips_image_pio_input( in ) )
return( -1 );
}
if( compress < 0 || compress > 9 ) {
vips_error( "vips2png",
"%s", _( "compress should be in [0,9]" ) );
return( -1 );
}
/* Set compression parameters.
*/
png_set_compression_level( write->pPng, compress );
/* Set row filter.
*/
png_set_filter( write->pPng, 0, filter );
bit_depth = in->BandFmt == VIPS_FORMAT_UCHAR ? 8 : 16;
switch( in->Bands ) {
case 1: color_type = PNG_COLOR_TYPE_GRAY; break;
case 2: color_type = PNG_COLOR_TYPE_GRAY_ALPHA; break;
case 3: color_type = PNG_COLOR_TYPE_RGB; break;
case 4: color_type = PNG_COLOR_TYPE_RGB_ALPHA; break;
default:
vips_error( "vips2png",
_( "can't save %d band image as png" ), in->Bands );
return( -1 );
}
interlace_type = interlace ? PNG_INTERLACE_ADAM7 : PNG_INTERLACE_NONE;
png_set_IHDR( write->pPng, write->pInfo,
in->Xsize, in->Ysize, bit_depth, color_type, interlace_type,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT );
/* Set resolution. libpng uses pixels per meter.
*/
png_set_pHYs( write->pPng, write->pInfo,
VIPS_RINT( in->Xres * 1000 ), VIPS_RINT( in->Yres * 1000 ),
PNG_RESOLUTION_METER );
/* Set ICC Profile.
*/
if( profile &&
!strip ) {
if( strcmp( profile, "none" ) != 0 ) {
void *data;
size_t length;
if( !(data = vips__file_read_name( profile,
VIPS_ICC_DIR, &length )) )
return( -1 );
#ifdef DEBUG
printf( "write_vips: "
"attaching %zd bytes of ICC profile\n",
length );
#endif /*DEBUG*/
png_set_iCCP( write->pPng, write->pInfo, "icc",
PNG_COMPRESSION_TYPE_BASE, data, length );
}
}
else if( vips_image_get_typeof( in, VIPS_META_ICC_NAME ) &&
!strip ) {
void *data;
size_t length;
if( vips_image_get_blob( in, VIPS_META_ICC_NAME,
&data, &length ) )
return( -1 );
#ifdef DEBUG
printf( "write_vips: attaching %zd bytes of ICC profile\n",
length );
#endif /*DEBUG*/
png_set_iCCP( write->pPng, write->pInfo, "icc",
PNG_COMPRESSION_TYPE_BASE, data, length );
}
png_write_info( write->pPng, write->pInfo );
/* If we're an intel byte order CPU and this is a 16bit image, we need
* to swap bytes.
*/
if( bit_depth > 8 && !vips_amiMSBfirst() )
png_set_swap( write->pPng );
if( interlace )
nb_passes = png_set_interlace_handling( write->pPng );
else
nb_passes = 1;
/* Write data.
*/
for( i = 0; i < nb_passes; i++ )
if( vips_sink_disc( in, write_png_block, write ) )
return( -1 );
/* The setjmp() was held by our background writer: reset it.
*/
if( setjmp( png_jmpbuf( write->pPng ) ) )
return( -1 );
png_write_end( write->pPng, write->pInfo );
return( 0 );
}
int
vips__tiff_write( VipsImage *in, const char *filename,
VipsForeignTiffCompression compression, int Q,
VipsForeignTiffPredictor predictor,
char *profile,
gboolean tile, int tile_width, int tile_height,
gboolean pyramid,
gboolean squash,
gboolean miniswhite,
VipsForeignTiffResunit resunit, double xres, double yres,
gboolean bigtiff,
gboolean rgbjpeg,
gboolean properties, gboolean strip )
{
Write *write;
#ifdef DEBUG
printf( "tiff2vips: libtiff version is \"%s\"\n", TIFFGetVersion() );
#endif /*DEBUG*/
vips__tiff_init();
if( vips_check_coding_known( "vips2tiff", in ) )
return( -1 );
/* Make output image.
*/
if( !(write = write_new( in, filename,
compression, Q, predictor, profile,
tile, tile_width, tile_height, pyramid, squash,
miniswhite, resunit, xres, yres, bigtiff, rgbjpeg,
properties, strip )) )
return( -1 );
if( vips_sink_disc( write->im, write_strip, write ) ) {
write_free( write );
return( -1 );
}
if( !TIFFWriteDirectory( write->layer->tif ) )
return( -1 );
if( write->pyramid ) {
/* Free lower pyramid resources ... this will TIFFClose() (but
* not delete) the smaller layers ready for us to read from
* them again.
*/
if( write->layer->below )
pyramid_free( write->layer->below );
/* Append smaller layers to the main file.
*/
if( write_gather( write ) ) {
write_free( write );
return( -1 );
}
}
write_free( write );
return( 0 );
}
/* Write a VIPS image to PNG.
*/
static int
write_vips( Write *write, int compress, int interlace )
{
VipsImage *in = write->in;
int bit_depth;
int color_type;
int interlace_type;
int i, nb_passes;
g_assert( in->BandFmt == VIPS_FORMAT_UCHAR ||
in->BandFmt == VIPS_FORMAT_USHORT );
g_assert( in->Coding == VIPS_CODING_NONE );
g_assert( in->Bands > 0 && in->Bands < 5 );
/* Catch PNG errors.
*/
if( setjmp( png_jmpbuf( write->pPng ) ) )
return( -1 );
/* Check input image.
*/
if( vips_image_pio_input( in ) )
return( -1 );
if( compress < 0 || compress > 9 ) {
vips_error( "vips2png",
"%s", _( "compress should be in [0,9]" ) );
return( -1 );
}
/* Set compression parameters.
*/
png_set_compression_level( write->pPng, compress );
bit_depth = in->BandFmt == VIPS_FORMAT_UCHAR ? 8 : 16;
switch( in->Bands ) {
case 1: color_type = PNG_COLOR_TYPE_GRAY; break;
case 2: color_type = PNG_COLOR_TYPE_GRAY_ALPHA; break;
case 3: color_type = PNG_COLOR_TYPE_RGB; break;
case 4: color_type = PNG_COLOR_TYPE_RGB_ALPHA; break;
default:
g_assert( 0 );
/* Keep -Wall happy.
*/
return( 0 );
}
interlace_type = interlace ? PNG_INTERLACE_ADAM7 : PNG_INTERLACE_NONE;
png_set_IHDR( write->pPng, write->pInfo,
in->Xsize, in->Ysize, bit_depth, color_type, interlace_type,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT );
/* Set resolution. libpnbg uses pixels per meter.
*/
png_set_pHYs( write->pPng, write->pInfo,
VIPS_RINT( in->Xres * 1000 ), VIPS_RINT( in->Yres * 1000 ),
PNG_RESOLUTION_METER );
/* Set ICC Profile.
*/
if( vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ) {
void *profile;
size_t profile_length;
if( vips_image_get_blob( in, VIPS_META_ICC_NAME,
&profile, &profile_length ) )
return( -1 );
#ifdef DEBUG
printf( "write_vips: attaching %zd bytes of ICC profile\n",
profile_length );
#endif /*DEBUG*/
png_set_iCCP( write->pPng, write->pInfo, "icc",
PNG_COMPRESSION_TYPE_BASE, profile, profile_length );
}
png_write_info( write->pPng, write->pInfo );
/* If we're an intel byte order CPU and this is a 16bit image, we need
* to swap bytes.
*/
if( bit_depth > 8 && !vips_amiMSBfirst() )
png_set_swap( write->pPng );
if( interlace )
nb_passes = png_set_interlace_handling( write->pPng );
else
nb_passes = 1;
/* Write data.
*/
for( i = 0; i < nb_passes; i++ )
if( vips_sink_disc( write->in, write_png_block, write ) )
return( -1 );
/* The setjmp() was held by our background writer: reset it.
*/
if( setjmp( png_jmpbuf( write->pPng ) ) )
return( -1 );
png_write_end( write->pPng, write->pInfo );
return( 0 );
}
/* Write a VIPS image to a JPEG compress struct.
*/
static int
write_vips( Write *write, int qfac, const char *profile )
{
IMAGE *in;
J_COLOR_SPACE space;
/* The image we'll be writing ... can change, see CMYK.
*/
in = write->in;
/* Should have been converted for save.
*/
g_assert( in->BandFmt == IM_BANDFMT_UCHAR );
g_assert( in->Coding == IM_CODING_NONE );
g_assert( in->Bands == 1 || in->Bands == 3 || in->Bands == 4 );
/* Check input image.
*/
if( im_pincheck( in ) )
return( -1 );
if( qfac < 0 || qfac > 100 ) {
im_error( "im_vips2jpeg",
"%s", _( "qfac should be in 0-100" ) );
return( -1 );
}
/* Set compression parameters.
*/
write->cinfo.image_width = in->Xsize;
write->cinfo.image_height = in->Ysize;
write->cinfo.input_components = in->Bands;
if( in->Bands == 4 && in->Type == IM_TYPE_CMYK ) {
space = JCS_CMYK;
/* IJG always sets an Adobe marker, so we should invert CMYK.
*/
if( !(write->inverted = im_open( "vips2jpeg_invert", "p" )) ||
im_invert( in, write->inverted ) )
return( -1 );
in = write->inverted;
}
else if( in->Bands == 3 )
space = JCS_RGB;
else if( in->Bands == 1 )
space = JCS_GRAYSCALE;
else
/* Use luminance compression for all channels.
*/
space = JCS_UNKNOWN;
write->cinfo.in_color_space = space;
/* Build VIPS output stuff now we know the image we'll be writing.
*/
if( !(write->row_pointer =
IM_ARRAY( NULL, write->in->Ysize, JSAMPROW )) )
return( -1 );
/* Rest to default.
*/
jpeg_set_defaults( &write->cinfo );
jpeg_set_quality( &write->cinfo, qfac, TRUE );
/* Build compress tables.
*/
jpeg_start_compress( &write->cinfo, TRUE );
/* Write any APP markers we need.
*/
if( write_exif( write ) )
return( -1 );
/* A profile supplied as an argument overrides an embedded profile.
* "none" means don't attach a profile.
*/
if( profile &&
strcmp( profile, "none" ) != 0 &&
write_profile_file( write, profile ) )
return( -1 );
if( !profile &&
im_header_get_typeof( in, IM_META_ICC_NAME ) &&
write_profile_meta( write ) )
return( -1 );
/* Write data. Note that the write function grabs the longjmp()!
*/
if( vips_sink_disc( write->in, write_jpeg_block, write ) )
return( -1 );
/* We have to reinstate the setjmp() before we jpeg_finish_compress().
*/
if( setjmp( write->eman.jmp ) )
return( -1 );
jpeg_finish_compress( &write->cinfo );
return( 0 );
}
/* Write a VIPS image to PNG.
*/
static int
write_vips( Write *write,
int compress, int interlace, const char *profile,
VipsForeignPngFilter filter, gboolean strip,
gboolean palette, int colours, int Q, double dither )
{
VipsImage *in = write->in;
int bit_depth;
int color_type;
int interlace_type;
int i, nb_passes;
g_assert( in->BandFmt == VIPS_FORMAT_UCHAR ||
in->BandFmt == VIPS_FORMAT_USHORT );
g_assert( in->Coding == VIPS_CODING_NONE );
g_assert( in->Bands > 0 && in->Bands < 5 );
/* Catch PNG errors.
*/
if( setjmp( png_jmpbuf( write->pPng ) ) )
return( -1 );
/* Check input image. If we are writing interlaced, we need to make 7
* passes over the image. We advertise ourselves as seq, so to ensure
* we only suck once from upstream, switch to WIO.
*/
if( interlace ) {
if( !(write->memory = vips_image_copy_memory( in )) )
return( -1 );
in = write->memory;
}
else {
if( vips_image_pio_input( in ) )
return( -1 );
}
if( compress < 0 || compress > 9 ) {
vips_error( "vips2png",
"%s", _( "compress should be in [0,9]" ) );
return( -1 );
}
/* Set compression parameters.
*/
png_set_compression_level( write->pPng, compress );
/* Set row filter.
*/
png_set_filter( write->pPng, 0, filter );
bit_depth = in->BandFmt == VIPS_FORMAT_UCHAR ? 8 : 16;
switch( in->Bands ) {
case 1: color_type = PNG_COLOR_TYPE_GRAY; break;
case 2: color_type = PNG_COLOR_TYPE_GRAY_ALPHA; break;
case 3: color_type = PNG_COLOR_TYPE_RGB; break;
case 4: color_type = PNG_COLOR_TYPE_RGB_ALPHA; break;
default:
vips_error( "vips2png",
_( "can't save %d band image as png" ), in->Bands );
return( -1 );
}
#ifdef HAVE_IMAGEQUANT
/* Enable image quantisation to paletted 8bpp PNG if colours is set.
*/
if( palette ) {
g_assert( colours >= 2 &&
colours <= 256 );
bit_depth = 8;
color_type = PNG_COLOR_TYPE_PALETTE;
}
#else
if( palette )
g_warning( "%s",
_( "ignoring palette (no quantisation support)" ) );
#endif /*HAVE_IMAGEQUANT*/
interlace_type = interlace ? PNG_INTERLACE_ADAM7 : PNG_INTERLACE_NONE;
png_set_IHDR( write->pPng, write->pInfo,
in->Xsize, in->Ysize, bit_depth, color_type, interlace_type,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT );
/* Set resolution. libpng uses pixels per meter.
*/
png_set_pHYs( write->pPng, write->pInfo,
VIPS_RINT( in->Xres * 1000 ), VIPS_RINT( in->Yres * 1000 ),
PNG_RESOLUTION_METER );
/* Set ICC Profile.
*/
if( profile &&
!strip ) {
if( strcmp( profile, "none" ) != 0 ) {
void *data;
size_t length;
if( !(data = vips__file_read_name( profile,
vips__icc_dir(), &length )) )
return( -1 );
#ifdef DEBUG
printf( "write_vips: "
"attaching %zd bytes of ICC profile\n",
length );
#endif /*DEBUG*/
png_set_iCCP( write->pPng, write->pInfo, "icc",
PNG_COMPRESSION_TYPE_BASE, data, length );
}
}
else if( vips_image_get_typeof( in, VIPS_META_ICC_NAME ) &&
!strip ) {
void *data;
size_t length;
if( vips_image_get_blob( in, VIPS_META_ICC_NAME,
&data, &length ) )
return( -1 );
#ifdef DEBUG
printf( "write_vips: attaching %zd bytes of ICC profile\n",
length );
#endif /*DEBUG*/
png_set_iCCP( write->pPng, write->pInfo, "icc",
PNG_COMPRESSION_TYPE_BASE, data, length );
}
if( vips_image_get_typeof( in, VIPS_META_XMP_NAME ) ) {
const char *str;
if( vips_image_get_string( in, VIPS_META_XMP_NAME, &str ) )
return( -1 );
vips__png_set_text( write->pPng, write->pInfo,
"XML:com.adobe.xmp", str );
}
/* Set any "png-comment-xx-yyy" metadata items.
*/
if( vips_image_map( in,
write_png_comment, write ) )
return( -1 );
#ifdef HAVE_IMAGEQUANT
if( palette ) {
VipsImage *im_index;
VipsImage *im_palette;
int palette_count;
png_color *png_palette;
png_byte *png_trans;
int trans_count;
if( vips__quantise_image( in, &im_index, &im_palette,
colours, Q, dither ) )
return( -1 );
palette_count = im_palette->Xsize;
g_assert( palette_count <= PNG_MAX_PALETTE_LENGTH );
png_palette = (png_color *) png_malloc( write->pPng,
palette_count * sizeof( png_color ) );
png_trans = (png_byte *) png_malloc( write->pPng,
palette_count * sizeof( png_byte ) );
trans_count = 0;
for( i = 0; i < palette_count; i++ ) {
VipsPel *p = (VipsPel *)
VIPS_IMAGE_ADDR( im_palette, i, 0 );
png_color *col = &png_palette[i];
col->red = p[0];
col->green = p[1];
col->blue = p[2];
png_trans[i] = p[3];
if( p[3] != 255 )
trans_count = i + 1;
#ifdef DEBUG
printf( "write_vips: palette[%d] %d %d %d %d\n",
i + 1, p[0], p[1], p[2], p[3] );
#endif /*DEBUG*/
}
#ifdef DEBUG
printf( "write_vips: attaching %d color palette\n",
palette_count );
#endif /*DEBUG*/
png_set_PLTE( write->pPng, write->pInfo, png_palette,
palette_count );
if( trans_count ) {
#ifdef DEBUG
printf( "write_vips: attaching %d alpha values\n",
trans_count );
#endif /*DEBUG*/
png_set_tRNS( write->pPng, write->pInfo, png_trans,
trans_count, NULL );
}
png_free( write->pPng, (void *) png_palette );
png_free( write->pPng, (void *) png_trans );
VIPS_UNREF( im_palette );
VIPS_UNREF( write->memory );
write->memory = im_index;
in = write->memory;
}
#endif /*HAVE_IMAGEQUANT*/
png_write_info( write->pPng, write->pInfo );
/* If we're an intel byte order CPU and this is a 16bit image, we need
* to swap bytes.
*/
if( bit_depth > 8 &&
!vips_amiMSBfirst() )
png_set_swap( write->pPng );
if( interlace )
nb_passes = png_set_interlace_handling( write->pPng );
else
nb_passes = 1;
/* Write data.
*/
for( i = 0; i < nb_passes; i++ )
if( vips_sink_disc( in, write_png_block, write ) )
return( -1 );
/* The setjmp() was held by our background writer: reset it.
*/
if( setjmp( png_jmpbuf( write->pPng ) ) )
return( -1 );
png_write_end( write->pPng, write->pInfo );
return( 0 );
}
/* Write a VIPS image to a JPEG compress struct.
*/
static int
write_vips( Write *write, int qfac, const char *profile,
gboolean optimize_coding, gboolean progressive, gboolean strip,
gboolean no_subsample, gboolean trellis_quant,
gboolean overshoot_deringing, gboolean optimize_scans, int quant_table )
{
VipsImage *in;
J_COLOR_SPACE space;
/* The image we'll be writing ... can change, see CMYK.
*/
in = write->in;
/* Should have been converted for save.
*/
g_assert( in->BandFmt == VIPS_FORMAT_UCHAR );
g_assert( in->Coding == VIPS_CODING_NONE );
g_assert( in->Bands == 1 ||
in->Bands == 3 ||
in->Bands == 4 );
/* Check input image.
*/
if( vips_image_pio_input( in ) )
return( -1 );
/* Set compression parameters.
*/
write->cinfo.image_width = in->Xsize;
write->cinfo.image_height = in->Ysize;
write->cinfo.input_components = in->Bands;
if( in->Bands == 4 &&
in->Type == VIPS_INTERPRETATION_CMYK ) {
space = JCS_CMYK;
/* IJG always sets an Adobe marker, so we should invert CMYK.
*/
if( vips_invert( in, &write->inverted, NULL ) )
return( -1 );
in = write->inverted;
}
else if( in->Bands == 3 )
space = JCS_RGB;
else if( in->Bands == 1 )
space = JCS_GRAYSCALE;
else
/* Use luminance compression for all channels.
*/
space = JCS_UNKNOWN;
write->cinfo.in_color_space = space;
/* Build VIPS output stuff now we know the image we'll be writing.
*/
if( !(write->row_pointer = VIPS_ARRAY( NULL, in->Ysize, JSAMPROW )) )
return( -1 );
#ifdef HAVE_JPEG_EXT_PARAMS
/* Reset compression profile to libjpeg defaults
*/
if( jpeg_c_int_param_supported( &write->cinfo, JINT_COMPRESS_PROFILE ) )
jpeg_c_set_int_param( &write->cinfo,
JINT_COMPRESS_PROFILE, JCP_FASTEST );
#endif
/* Reset to default.
*/
jpeg_set_defaults( &write->cinfo );
/* Compute optimal Huffman coding tables.
*/
write->cinfo.optimize_coding = optimize_coding;
#ifdef HAVE_JPEG_EXT_PARAMS
/* Apply trellis quantisation to each 8x8 block. Implies
* "optimize_coding".
*/
if( trellis_quant ) {
if( jpeg_c_bool_param_supported( &write->cinfo,
JBOOLEAN_TRELLIS_QUANT ) ) {
jpeg_c_set_bool_param( &write->cinfo,
JBOOLEAN_TRELLIS_QUANT, TRUE );
write->cinfo.optimize_coding = TRUE;
}
else
vips_warn( "vips2jpeg",
"%s", _( "trellis_quant unsupported" ) );
}
/* Apply overshooting to samples with extreme values e.g. 0 & 255
* for 8-bit.
*/
if( overshoot_deringing ) {
if( jpeg_c_bool_param_supported( &write->cinfo,
JBOOLEAN_OVERSHOOT_DERINGING ) )
jpeg_c_set_bool_param( &write->cinfo,
JBOOLEAN_OVERSHOOT_DERINGING, TRUE );
else
vips_warn( "vips2jpeg",
"%s", _( "overshoot_deringing unsupported" ) );
}
/* Split the spectrum of DCT coefficients into separate scans.
* Requires progressive output. Must be set before
* jpeg_simple_progression.
*/
if( optimize_scans ) {
if( progressive ) {
if( jpeg_c_bool_param_supported( &write->cinfo,
JBOOLEAN_OPTIMIZE_SCANS ) )
jpeg_c_set_bool_param( &write->cinfo,
JBOOLEAN_OPTIMIZE_SCANS, TRUE );
else
vips_warn( "vips2jpeg",
"%s", _( "Ignoring optimize_scans" ) );
}
else
vips_warn( "vips2jpeg", "%s",
_( "Ignoring optimize_scans for baseline" ) );
}
/* Use predefined quantization table.
*/
if( quant_table > 0 ) {
if( jpeg_c_int_param_supported( &write->cinfo,
JINT_BASE_QUANT_TBL_IDX ) )
jpeg_c_set_int_param( &write->cinfo,
JINT_BASE_QUANT_TBL_IDX, quant_table );
else
vips_warn( "vips2jpeg",
"%s", _( "Setting quant_table unsupported" ) );
}
#else
/* Using jpeglib.h without extension parameters, warn of ignored
* options.
*/
if( trellis_quant )
vips_warn( "vips2jpeg", "%s", _( "Ignoring trellis_quant" ) );
if( overshoot_deringing )
vips_warn( "vips2jpeg",
"%s", _( "Ignoring overshoot_deringing" ) );
if( optimize_scans )
vips_warn( "vips2jpeg", "%s", _( "Ignoring optimize_scans" ) );
if( quant_table > 0 )
vips_warn( "vips2jpeg", "%s", _( "Ignoring quant_table" ) );
#endif
/* Set compression quality. Must be called after setting params above.
*/
jpeg_set_quality( &write->cinfo, qfac, TRUE );
/* Enable progressive write.
*/
if( progressive )
jpeg_simple_progression( &write->cinfo );
/* Turn off chroma subsampling. Follow IM and do it automatically for
* high Q.
*/
if( no_subsample ||
qfac > 90 ) {
int i;
for( i = 0; i < in->Bands; i++ ) {
write->cinfo.comp_info[i].h_samp_factor = 1;
write->cinfo.comp_info[i].v_samp_factor = 1;
}
}
/* Don't write the APP0 JFIF headers if we are stripping.
*/
if( strip )
write->cinfo.write_JFIF_header = FALSE;
/* Build compress tables.
*/
jpeg_start_compress( &write->cinfo, TRUE );
/* Write any APP markers we need.
*/
if( !strip ) {
if( write_exif( write ) ||
write_blob( write,
VIPS_META_XMP_NAME, JPEG_APP0 + 1 ) ||
write_blob( write,
VIPS_META_IPCT_NAME, JPEG_APP0 + 13 ) )
return( -1 );
/* A profile supplied as an argument overrides an embedded
* profile. "none" means don't attach a profile.
*/
if( profile &&
strcmp( profile, "none" ) != 0 &&
write_profile_file( write, profile ) )
return( -1 );
if( !profile &&
vips_image_get_typeof( in, VIPS_META_ICC_NAME ) &&
write_profile_meta( write ) )
return( -1 );
}
/* Write data. Note that the write function grabs the longjmp()!
*/
if( vips_sink_disc( in, write_jpeg_block, write ) )
return( -1 );
/* We have to reinstate the setjmp() before we jpeg_finish_compress().
*/
if( setjmp( write->eman.jmp ) )
return( -1 );
jpeg_finish_compress( &write->cinfo );
return( 0 );
}