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libvips/libvips/foreign/webpsave.c

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/* save to webp
*
* 24/11/11
* - wrap a class around the webp writer
* 6/8/13
* - from vips2jpeg.c
* 31/5/16
* - buffer write ignored lossless, thanks aaron42net
* 2/5/16 Felix Bünemann
* - used advanced encoding API, expose controls
* 8/11/16
* - add metadata write
* 29/10/18
* - add animated webp support
* 29/10/18
* - target libwebp 0.5+ and remove some ifdefs
* - add animated webp write
* - use libwebpmux instead of our own thing, phew
* 15/1/19 lovell
* - add @effort
* 6/7/19 [deftomat]
* - support array of delays
* 8/7/19
* - set loop even if we strip
* 14/10/19
* - revise for target IO
* 18/7/20
* - add @profile param to match tiff, jpg, etc.
* 18/7/20
* - add @profile param to match tiff, jpg, etc.
* 30/7/21
* - rename "reduction_effort" as "effort"
* 7/9/22 dloebl
* - switch to sink_disc
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG_VERBOSE
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include "pforeign.h"
#ifdef HAVE_LIBWEBP
#include <webp/encode.h>
#include <webp/types.h>
#include <webp/mux.h>
typedef int (*webp_import)( WebPPicture *picture,
const uint8_t *rgb, int stride );
typedef enum _VipsForeignSaveWebpMode {
VIPS_FOREIGN_SAVE_WEBP_MODE_SINGLE,
VIPS_FOREIGN_SAVE_WEBP_MODE_ANIM
} VipsForeignSaveWebpMode;
typedef struct _VipsForeignSaveWebp {
VipsForeignSave parent_object;
VipsTarget *target;
/* Animated or single image write mode?
* Important, because we use a different API
* for animated WebP write.
*/
VipsForeignSaveWebpMode mode;
VipsImage *image;
int timestamp_ms;
/* Quality factor.
*/
int Q;
/* Turn on lossless encode.
*/
gboolean lossless;
/* Lossy compression preset.
*/
VipsForeignWebpPreset preset;
/* Enable smart chroma subsampling.
*/
gboolean smart_subsample;
/* Use preprocessing in lossless mode.
*/
gboolean near_lossless;
/* Alpha quality.
*/
int alpha_q;
/* Level of CPU effort to reduce file size.
*/
int effort;
/* Animated webp options.
*/
int gif_delay;
int *delay;
int delay_length;
gboolean strip;
/* Attempt to minimise size
*/
gboolean min_size;
/* Allow mixed encoding (might reduce file size)
*/
gboolean mixed;
/* Min between key frames.
*/
int kmin;
/* Max between keyframes.
*/
int kmax;
/* Profile to embed.
*/
const char *profile;
WebPConfig config;
/* Output is written here. We can only support memory write, since we
* handle metadata.
*/
WebPMemoryWriter memory_writer;
/* Write animated webp here.
*/
WebPAnimEncoder *enc;
/* Add metadata with this.
*/
WebPMux *mux;
/* The current y position in the frame and the current page index.
*/
int write_y;
int page_number;
/* VipsRegion is not always contiguous, but we need contiguous RGB(A)
* for libwebp. We need to copy each frame to a local buffer.
*/
VipsPel *frame_bytes;
} VipsForeignSaveWebp;
typedef VipsForeignSaveClass VipsForeignSaveWebpClass;
G_DEFINE_ABSTRACT_TYPE( VipsForeignSaveWebp, vips_foreign_save_webp,
VIPS_TYPE_FOREIGN_SAVE );
static void
vips_foreign_save_webp_unset( VipsForeignSaveWebp *write )
{
WebPMemoryWriterClear( &write->memory_writer );
VIPS_FREEF( WebPAnimEncoderDelete, write->enc );
VIPS_FREEF( WebPMuxDelete, write->mux );
VIPS_UNREF( write->image );
}
static void
vips_foreign_save_webp_dispose( GObject *gobject )
{
VipsForeignSaveWebp *webp = (VipsForeignSaveWebp *) gobject;
VIPS_UNREF( webp->target );
VIPS_FREE( webp->frame_bytes );
G_OBJECT_CLASS( vips_foreign_save_webp_parent_class )->
dispose( gobject );
}
static gboolean
vips_foreign_save_webp_pic_init( VipsForeignSaveWebp *write, WebPPicture *pic )
{
if( !WebPPictureInit( pic ) ) {
vips_error( "webpsave", "%s", _( "picture version error" ) );
return( FALSE );
}
pic->writer = WebPMemoryWrite;
pic->custom_ptr = (void *) &write->memory_writer;
/* Smart subsampling needs use_argb because it is applied during
* RGB to YUV conversion.
*/
pic->use_argb = write->lossless ||
write->near_lossless ||
write->smart_subsample;
return( TRUE );
}
/* Write a VipsImage into an unintialised pic.
*/
static int
vips_foreign_save_webp_write_webp_image( VipsForeignSaveWebp *write,
const VipsPel *imagedata, WebPPicture *pic )
{
webp_import import;
int page_height = vips_image_get_page_height( write->image );
if( !vips_foreign_save_webp_pic_init( write, pic ) )
return( -1 );
pic->width = write->image->Xsize;
pic->height = page_height;
if( write->image->Bands == 4 )
import = WebPPictureImportRGBA;
else
import = WebPPictureImportRGB;
if( !import( pic, imagedata,
write->image->Xsize * write->image->Bands ) ) {
WebPPictureFree( pic );
vips_error( "webpsave", "%s", _( "picture memory error" ) );
return( -1 );
}
return( 0 );
}
/* We have a complete frame --- write!
*/
static int
vips_foreign_save_webp_write_frame( VipsForeignSaveWebp *webp)
{
WebPPicture pic;
VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( webp );
if( vips_foreign_save_webp_write_webp_image( webp, webp->frame_bytes,
&pic ) )
return( -1 );
/* Animated write
*/
if( webp->mode == VIPS_FOREIGN_SAVE_WEBP_MODE_ANIM ) {
if( !WebPAnimEncoderAdd( webp->enc,
&pic, webp->timestamp_ms, &webp->config ) ) {
WebPPictureFree( &pic );
vips_error( class->nickname,
"%s", _( "anim add error" ) );
return( -1 );
}
/* Adjust current timestamp
*/
if( webp->delay &&
webp->page_number < webp->delay_length )
webp->timestamp_ms += webp->delay[webp->page_number];
else
webp->timestamp_ms += webp->gif_delay * 10;
}
else {
/* Single image write
*/
if( !WebPEncode( &webp->config, &pic ) ) {
WebPPictureFree( &pic );
vips_error( "webpsave", "%s",
_( "unable to encode" ) );
return( -1 );
}
}
WebPPictureFree( &pic );
return( 0 );
}
/* Another chunk of pixels have arrived from the pipeline. Add to frame, and
* if the frame completes, compress and write to the target.
*/
static int
vips_foreign_save_webp_sink_disc( VipsRegion *region, VipsRect *area, void *a )
{
VipsForeignSaveWebp *webp = (VipsForeignSaveWebp*) a;
int i;
int page_height = vips_image_get_page_height( webp->image );
/* Write the new pixels into the frame.
*/
for( i = 0; i < area->height; i++ ) {
memcpy( webp->frame_bytes + area->width *
webp->write_y * webp->image->Bands,
VIPS_REGION_ADDR( region, 0, area->top + i ),
area->width * webp->image->Bands );
webp->write_y += 1;
/* If we've filled the frame, write and move it down.
*/
if( webp->write_y == page_height ) {
if( vips_foreign_save_webp_write_frame( webp ) )
return( -1 );
webp->write_y = 0;
webp->page_number += 1;
}
}
return( 0 );
}
static WebPPreset
get_preset( VipsForeignWebpPreset preset )
{
switch( preset ) {
case VIPS_FOREIGN_WEBP_PRESET_DEFAULT:
return( WEBP_PRESET_DEFAULT );
case VIPS_FOREIGN_WEBP_PRESET_PICTURE:
return( WEBP_PRESET_PICTURE );
case VIPS_FOREIGN_WEBP_PRESET_PHOTO:
return( WEBP_PRESET_PHOTO );
case VIPS_FOREIGN_WEBP_PRESET_DRAWING:
return( WEBP_PRESET_DRAWING );
case VIPS_FOREIGN_WEBP_PRESET_ICON:
return( WEBP_PRESET_ICON );
case VIPS_FOREIGN_WEBP_PRESET_TEXT:
return( WEBP_PRESET_TEXT );
default:
g_assert_not_reached();
}
/* Keep -Wall happy.
*/
return( -1 );
}
static void
vips_webp_set_count( VipsForeignSaveWebp *write, int loop_count )
{
uint32_t features;
if( WebPMuxGetFeatures( write->mux, &features ) == WEBP_MUX_OK &&
(features & ANIMATION_FLAG) ) {
WebPMuxAnimParams params;
if( WebPMuxGetAnimationParams( write->mux, &params ) ==
WEBP_MUX_OK ) {
params.loop_count = loop_count;
WebPMuxSetAnimationParams( write->mux, &params );
}
}
}
static int
vips_webp_set_chunk( VipsForeignSaveWebp *write,
const char *webp_name, const void *data, size_t length )
{
WebPData chunk;
chunk.bytes = data;
chunk.size = length;
if( WebPMuxSetChunk( write->mux, webp_name, &chunk, 1 ) !=
WEBP_MUX_OK ) {
vips_error( "webpsave",
"%s", _( "chunk add error" ) );
return( -1 );
}
return( 0 );
}
static int
vips_webp_add_chunks( VipsForeignSaveWebp *write )
{
int i;
for( i = 0; i < vips__n_webp_names; i++ ) {
const char *vips_name = vips__webp_names[i].vips;
const char *webp_name = vips__webp_names[i].webp;
if( vips_image_get_typeof( write->image, vips_name ) ) {
const void *data;
size_t length;
if( vips_image_get_blob( write->image,
vips_name, &data, &length ) ||
vips_webp_set_chunk( write,
webp_name, data, length ) )
return( -1 );
}
}
return( 0 );
}
static int
vips_webp_add_metadata( VipsForeignSaveWebp *write )
{
WebPData data;
data.bytes = write->memory_writer.mem;
data.size = write->memory_writer.size;
/* Parse what we have.
*/
if( !(write->mux = WebPMuxCreate( &data, 1 )) ) {
vips_error( "webpsave", "%s", _( "mux error" ) );
return( -1 );
}
if( vips_image_get_typeof( write->image, "loop" ) ) {
int loop;
if( vips_image_get_int( write->image, "loop", &loop ) )
return( -1 );
vips_webp_set_count( write, loop );
}
/* DEPRECATED "gif-loop"
*/
else if ( vips_image_get_typeof( write->image, "gif-loop" ) ) {
int gif_loop;
if( vips_image_get_int( write->image, "gif-loop", &gif_loop ) )
return( -1 );
vips_webp_set_count( write, gif_loop == 0 ? 0 : gif_loop + 1 );
}
/* Add extra metadata.
*/
if( !write->strip ) {
/* We need to rebuild exif from the other image tags before
* writing the metadata.
*/
if( vips__exif_update( write->image ) )
return( -1 );
/* Override profile.
*/
if( write->profile &&
vips__profile_set( write->image, write->profile ) )
return( -1 );
if( vips_webp_add_chunks( write ) )
return( -1 );
}
if( WebPMuxAssemble( write->mux, &data ) != WEBP_MUX_OK ) {
vips_error( "webpsave", "%s", _( "mux error" ) );
return( -1 );
}
/* Free old stuff, reinit with new stuff.
*/
WebPMemoryWriterClear( &write->memory_writer );
write->memory_writer.mem = (uint8_t *) data.bytes;
write->memory_writer.size = data.size;
return( 0 );
}
static int
vips_foreign_save_webp_init_config( VipsForeignSaveWebp *webp ) {
/* Init WebP config.
*/
WebPMemoryWriterInit( &webp->memory_writer );
if( !WebPConfigInit( &webp->config ) ) {
vips_foreign_save_webp_unset( webp );
vips_error( "webpsave",
"%s", _( "config version error" ) );
return( -1 );
}
/* These presets are only for lossy compression. There seems to be
* separate API for lossless or near-lossless, see
* WebPConfigLosslessPreset().
*/
if( !(webp->lossless || webp->near_lossless) &&
!WebPConfigPreset( &webp->config, get_preset( webp->preset ),
webp->Q ) ) {
vips_foreign_save_webp_unset( webp );
vips_error( "webpsave", "%s", _( "config version error" ) );
return( -1 );
}
webp->config.lossless = webp->lossless || webp->near_lossless;
webp->config.alpha_quality = webp->alpha_q;
webp->config.method = webp->effort;
if( webp->lossless )
webp->config.quality = webp->Q;
if( webp->near_lossless )
webp->config.near_lossless = webp->Q;
if( webp->smart_subsample )
webp->config.use_sharp_yuv = 1;
if( !WebPValidateConfig( &webp->config ) ) {
vips_foreign_save_webp_unset( webp );
vips_error( "webpsave", "%s", _( "invalid configuration" ) );
return( -1 );
}
return( 0 );
}
static int
vips_foreign_save_webp_init_anim_enc( VipsForeignSaveWebp *webp ) {
WebPAnimEncoderOptions anim_config;
int i;
int page_height = vips_image_get_page_height( webp->image );
/* Init config for animated write
*/
if( !WebPAnimEncoderOptionsInit( &anim_config ) ) {
vips_error( "webpsave",
"%s", _( "config version error" ) );
return( -1 );
}
anim_config.minimize_size = webp->min_size;
anim_config.allow_mixed = webp->mixed;
anim_config.kmin = webp->kmin;
anim_config.kmax = webp->kmax;
webp->enc = WebPAnimEncoderNew( webp->image->Xsize, page_height,
&anim_config );
if( !webp->enc ) {
vips_error( "webpsave",
"%s", _( "unable to init animation" ) );
return( -1 );
}
/* Get delay array
*
* There might just be the old gif-delay field. This is centiseconds.
*/
webp->gif_delay = 10;
if( vips_image_get_typeof( webp->image, "gif-delay" ) &&
vips_image_get_int( webp->image, "gif-delay",
&webp->gif_delay ) )
return( -1 );
/* New images have an array of ints instead.
*/
webp->delay = NULL;
if( vips_image_get_typeof( webp->image, "delay" ) &&
vips_image_get_array_int( webp->image, "delay",
&webp->delay, &webp->delay_length ) )
return( -1 );
/* Force frames with a small or no duration to 100ms
* to be consistent with web browsers and other
* transcoding tools.
*/
if( webp->gif_delay <= 1 )
webp->gif_delay = 10;
for( i = 0; i < webp->delay_length; i++ )
if( webp->delay[i] <= 10 )
webp->delay[i] = 100;
return( 0 );
}
static int
vips_foreign_save_webp_finish_anim( VipsForeignSaveWebp *webp ) {
WebPData webp_data;
/* Closes animated encoder and adds last frame delay.
*/
if( !WebPAnimEncoderAdd( webp->enc,
NULL, webp->timestamp_ms, NULL ) ) {
vips_error( "webpsave",
"%s", _( "anim close error" ) );
return( -1 );
}
if( !WebPAnimEncoderAssemble( webp->enc, &webp_data ) ) {
vips_error( "webpsave",
"%s", _( "anim build error" ) );
return( -1 );
}
/* Terrible. This will only work if the output buffer is currently
* empty.
*/
if( webp->memory_writer.mem != NULL ) {
vips_error( "webpsave", "%s", _( "internal error" ) );
return( -1 );
}
webp->memory_writer.mem = (uint8_t *) webp_data.bytes;
webp->memory_writer.size = webp_data.size;
return( 0 );
}
static int
vips_foreign_save_webp_build( VipsObject *object )
{
VipsForeignSave *save = (VipsForeignSave *) object;
VipsForeignSaveWebp *webp = (VipsForeignSaveWebp *) object;
int page_height;
if( VIPS_OBJECT_CLASS( vips_foreign_save_webp_parent_class )->
build( object ) )
return( -1 );
page_height = vips_image_get_page_height( save->ready );
if( save->ready->Xsize > 16383 || page_height > 16383 ) {
vips_error( "webpsave", _( "image too large" ) );
vips_foreign_save_webp_unset( webp );
return( -1 );
}
/* We need a copy of the input image in case we change the metadata
* eg. in vips__exif_update().
*/
if( vips_copy( save->ready, &webp->image, NULL ) ) {
vips_foreign_save_webp_unset( webp );
return( -1 );
}
/* RGB(A) frame as a contiguous buffer.
*/
size_t frame_size = (size_t) webp->image->Bands * webp->image->Xsize * page_height;
webp->frame_bytes = g_try_malloc( frame_size );
if( webp->frame_bytes == NULL ) {
vips_error( "webpsave", _( "failed to allocate %zu bytes" ), frame_size );
vips_foreign_save_webp_unset( webp );
return( -1 );
}
/* Init generic WebP config
*/
if( vips_foreign_save_webp_init_config( webp ) )
return( -1 );
/* Determine the write mode (single image or animated write)
*/
webp->mode = VIPS_FOREIGN_SAVE_WEBP_MODE_SINGLE;
if( page_height != webp->image->Ysize )
webp->mode = VIPS_FOREIGN_SAVE_WEBP_MODE_ANIM;
/* Init config for animated write (if necessary)
*/
if( webp->mode == VIPS_FOREIGN_SAVE_WEBP_MODE_ANIM )
if( vips_foreign_save_webp_init_anim_enc( webp ) )
return( -1 );
if( vips_sink_disc( webp->image,
vips_foreign_save_webp_sink_disc, webp ) )
return( -1 );
/* Finish animated write
*/
if( webp->mode == VIPS_FOREIGN_SAVE_WEBP_MODE_ANIM )
if( vips_foreign_save_webp_finish_anim( webp ) )
return( -1 );
if( vips_webp_add_metadata( webp ) ) {
vips_foreign_save_webp_unset( webp );
return( -1 );
}
if( vips_target_write( webp->target,
webp->memory_writer.mem, webp->memory_writer.size ) ) {
vips_foreign_save_webp_unset( webp );
return( -1 );
}
if( vips_target_end( webp->target ) )
return( -1 );
vips_foreign_save_webp_unset( webp );
return( 0 );
}
static const char *vips__save_webp_suffs[] = { ".webp", NULL };
#define UC VIPS_FORMAT_UCHAR
/* Type promotion for save ... just always go to uchar.
*/
static VipsBandFormat bandfmt_webp[10] = {
/* Band format: UC C US S UI I F X D DX */
/* Promotion: */ UC, UC, UC, UC, UC, UC, UC, UC, UC, UC
};
static void
vips_foreign_save_webp_class_init( VipsForeignSaveWebpClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsForeignClass *foreign_class = (VipsForeignClass *) class;
VipsForeignSaveClass *save_class = (VipsForeignSaveClass *) class;
gobject_class->dispose = vips_foreign_save_webp_dispose;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "webpsave_base";
object_class->description = _( "save as WebP" );
object_class->build = vips_foreign_save_webp_build;
foreign_class->suffs = vips__save_webp_suffs;
save_class->saveable = VIPS_SAVEABLE_RGBA_ONLY;
save_class->format_table = bandfmt_webp;
VIPS_ARG_INT( class, "Q", 10,
_( "Q" ),
_( "Q factor" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, Q ),
0, 100, 75 );
VIPS_ARG_BOOL( class, "lossless", 11,
_( "Lossless" ),
_( "Enable lossless compression" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, lossless ),
FALSE );
VIPS_ARG_ENUM( class, "preset", 12,
_( "Preset" ),
_( "Preset for lossy compression" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, preset ),
VIPS_TYPE_FOREIGN_WEBP_PRESET,
VIPS_FOREIGN_WEBP_PRESET_DEFAULT );
VIPS_ARG_BOOL( class, "smart_subsample", 13,
_( "Smart subsampling" ),
_( "Enable high quality chroma subsampling" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, smart_subsample ),
FALSE );
VIPS_ARG_BOOL( class, "near_lossless", 14,
_( "Near lossless" ),
_( "Enable preprocessing in lossless mode (uses Q)" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, near_lossless ),
FALSE );
VIPS_ARG_INT( class, "alpha_q", 15,
_( "Alpha quality" ),
_( "Change alpha plane fidelity for lossy compression" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, alpha_q ),
0, 100, 100 );
VIPS_ARG_BOOL( class, "min_size", 16,
_( "Minimise size" ),
_( "Optimise for minimum size" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, min_size ),
FALSE );
VIPS_ARG_INT( class, "kmin", 17,
_( "Minimum keyframe spacing" ),
_( "Minimum number of frames between key frames" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, kmin ),
0, INT_MAX, INT_MAX - 1 );
VIPS_ARG_INT( class, "kmax", 18,
_( "Maximum keyframe spacing" ),
_( "Maximum number of frames between key frames" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, kmax ),
0, INT_MAX, INT_MAX );
VIPS_ARG_INT( class, "effort", 19,
_( "Effort" ),
_( "Level of CPU effort to reduce file size" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, effort ),
0, 6, 4 );
VIPS_ARG_STRING( class, "profile", 20,
_( "Profile" ),
_( "ICC profile to embed" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, profile ),
NULL );
VIPS_ARG_INT( class, "reduction_effort", 21,
_( "Reduction effort" ),
_( "Level of CPU effort to reduce file size" ),
VIPS_ARGUMENT_OPTIONAL_INPUT | VIPS_ARGUMENT_DEPRECATED,
G_STRUCT_OFFSET( VipsForeignSaveWebp, effort ),
0, 6, 4 );
VIPS_ARG_BOOL( class, "mixed", 22,
_( "Mixed encoding" ),
_( "Allow mixed encoding (might reduce file size)" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebp, mixed ),
FALSE );
}
static void
vips_foreign_save_webp_init( VipsForeignSaveWebp *webp )
{
webp->Q = 75;
webp->alpha_q = 100;
webp->effort = 4;
/* ie. keyframes disabled by default.
*/
webp->kmin = INT_MAX - 1;
webp->kmax = INT_MAX;
}
typedef struct _VipsForeignSaveWebpTarget {
VipsForeignSaveWebp parent_object;
VipsTarget *target;
} VipsForeignSaveWebpTarget;
typedef VipsForeignSaveWebpClass VipsForeignSaveWebpTargetClass;
G_DEFINE_TYPE( VipsForeignSaveWebpTarget, vips_foreign_save_webp_target,
vips_foreign_save_webp_get_type() );
static int
vips_foreign_save_webp_target_build( VipsObject *object )
{
VipsForeignSaveWebp *webp = (VipsForeignSaveWebp *) object;
VipsForeignSaveWebpTarget *target =
(VipsForeignSaveWebpTarget *) object;
webp->target = target->target;
g_object_ref( webp->target );
if( VIPS_OBJECT_CLASS( vips_foreign_save_webp_target_parent_class )->
build( object ) )
return( -1 );
return( 0 );
}
static void
vips_foreign_save_webp_target_class_init(
VipsForeignSaveWebpTargetClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "webpsave_target";
object_class->build = vips_foreign_save_webp_target_build;
VIPS_ARG_OBJECT( class, "target", 1,
_( "Target" ),
_( "Target to save to" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebpTarget, target ),
VIPS_TYPE_TARGET );
}
static void
vips_foreign_save_webp_target_init( VipsForeignSaveWebpTarget *target )
{
}
typedef struct _VipsForeignSaveWebpFile {
VipsForeignSaveWebp parent_object;
char *filename;
} VipsForeignSaveWebpFile;
typedef VipsForeignSaveWebpClass VipsForeignSaveWebpFileClass;
G_DEFINE_TYPE( VipsForeignSaveWebpFile, vips_foreign_save_webp_file,
vips_foreign_save_webp_get_type() );
static int
vips_foreign_save_webp_file_build( VipsObject *object )
{
VipsForeignSaveWebp *webp = (VipsForeignSaveWebp *) object;
VipsForeignSaveWebpFile *file = (VipsForeignSaveWebpFile *) object;
if( !(webp->target = vips_target_new_to_file( file->filename )) )
return( -1 );
if( VIPS_OBJECT_CLASS( vips_foreign_save_webp_file_parent_class )->
build( object ) )
return( -1 );
return( 0 );
}
static void
vips_foreign_save_webp_file_class_init( VipsForeignSaveWebpFileClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "webpsave";
object_class->build = vips_foreign_save_webp_file_build;
VIPS_ARG_STRING( class, "filename", 1,
_( "Filename" ),
_( "Filename to save to" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebpFile, filename ),
NULL );
}
static void
vips_foreign_save_webp_file_init( VipsForeignSaveWebpFile *file )
{
}
typedef struct _VipsForeignSaveWebpBuffer {
VipsForeignSaveWebp parent_object;
VipsArea *buf;
} VipsForeignSaveWebpBuffer;
typedef VipsForeignSaveWebpClass VipsForeignSaveWebpBufferClass;
G_DEFINE_TYPE( VipsForeignSaveWebpBuffer, vips_foreign_save_webp_buffer,
vips_foreign_save_webp_get_type() );
static int
vips_foreign_save_webp_buffer_build( VipsObject *object )
{
VipsForeignSaveWebp *webp = (VipsForeignSaveWebp *) object;
VipsForeignSaveWebpBuffer *buffer =
(VipsForeignSaveWebpBuffer *) object;
VipsBlob *blob;
if( !(webp->target = vips_target_new_to_memory()) )
return( -1 );
if( VIPS_OBJECT_CLASS( vips_foreign_save_webp_buffer_parent_class )->
build( object ) )
return( -1 );
g_object_get( webp->target, "blob", &blob, NULL );
g_object_set( buffer, "buffer", blob, NULL );
vips_area_unref( VIPS_AREA( blob ) );
return( 0 );
}
static void
vips_foreign_save_webp_buffer_class_init(
VipsForeignSaveWebpBufferClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "webpsave_buffer";
object_class->build = vips_foreign_save_webp_buffer_build;
VIPS_ARG_BOXED( class, "buffer", 1,
_( "Buffer" ),
_( "Buffer to save to" ),
VIPS_ARGUMENT_REQUIRED_OUTPUT,
G_STRUCT_OFFSET( VipsForeignSaveWebpBuffer, buf ),
VIPS_TYPE_BLOB );
}
static void
vips_foreign_save_webp_buffer_init( VipsForeignSaveWebpBuffer *buffer )
{
}
typedef struct _VipsForeignSaveWebpMime {
VipsForeignSaveWebp parent_object;
} VipsForeignSaveWebpMime;
typedef VipsForeignSaveWebpClass VipsForeignSaveWebpMimeClass;
G_DEFINE_TYPE( VipsForeignSaveWebpMime, vips_foreign_save_webp_mime,
vips_foreign_save_webp_get_type() );
static int
vips_foreign_save_webp_mime_build( VipsObject *object )
{
VipsForeignSaveWebp *webp = (VipsForeignSaveWebp *) object;
VipsBlob *blob;
void *data;
size_t len;
if( !(webp->target = vips_target_new_to_memory()) )
return( -1 );
if( VIPS_OBJECT_CLASS( vips_foreign_save_webp_mime_parent_class )->
build( object ) )
return( -1 );
g_object_get( webp->target, "blob", &blob, NULL );
data = VIPS_AREA( blob )->data;
len = VIPS_AREA( blob )->length;
vips_area_unref( VIPS_AREA( blob ) );
printf( "Content-length: %zu\r\n", len );
printf( "Content-type: image/webp\r\n" );
printf( "\r\n" );
(void) fwrite( data, sizeof( char ), len, stdout );
fflush( stdout );
VIPS_UNREF( webp->target );
return( 0 );
}
static void
vips_foreign_save_webp_mime_class_init( VipsForeignSaveWebpMimeClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
object_class->nickname = "webpsave_mime";
object_class->description = _( "save image to webp mime" );
object_class->build = vips_foreign_save_webp_mime_build;
}
static void
vips_foreign_save_webp_mime_init( VipsForeignSaveWebpMime *mime )
{
}
#endif /*HAVE_LIBWEBP*/
/**
* vips_webpsave: (method)
* @in: image to save
* @filename: file to write to
* @...: %NULL-terminated list of optional named arguments
*
* Optional arguments:
*
* * @Q: %gint, quality factor
* * @lossless: %gboolean, enables lossless compression
* * @preset: #VipsForeignWebpPreset, choose lossy compression preset
* * @smart_subsample: %gboolean, enables high quality chroma subsampling
* * @near_lossless: %gboolean, preprocess in lossless mode (controlled by Q)
* * @alpha_q: %gint, set alpha quality in lossless mode
* * @effort: %gint, level of CPU effort to reduce file size
* * @min_size: %gboolean, minimise size
* * @mixed: %gboolean, allow both lossy and lossless encoding
* * @kmin: %gint, minimum number of frames between keyframes
* * @kmax: %gint, maximum number of frames between keyframes
* * @strip: %gboolean, remove all metadata from image
* * @profile: %gchararray, filename of ICC profile to attach
*
* Write an image to a file in WebP format.
*
* By default, images are saved in lossy format, with
* @Q giving the WebP quality factor. It has the range 0 - 100, with the
* default 75.
*
* Use @preset to hint the image type to the lossy compressor. The default is
* #VIPS_FOREIGN_WEBP_PRESET_DEFAULT.
*
* Set @smart_subsample to enable high quality chroma subsampling.
*
* Use @alpha_q to set the quality for the alpha channel in lossy mode. It has
* the range 1 - 100, with the default 100.
*
* Use @effort to control how much CPU time to spend attempting to
* reduce file size. A higher value means more effort and therefore CPU time
* should be spent. It has the range 0-6 and a default value of 4.
*
* Set @lossless to use lossless compression, or combine @near_lossless
* with @Q 80, 60, 40 or 20 to apply increasing amounts of preprocessing
* which improves the near-lossless compression ratio by up to 50%.
*
* For animated webp output, @min_size will try to optimize for minimum size.
*
* For animated webp output, @kmax sets the maximum number of frames between
* keyframes. Setting 0 means only keyframes. @kmin sets the minimum number of
* frames between frames. Setting 0 means no keyframes. By default, keyframes
* are disabled.
*
* For animated webp output, @mixed tries to improve the file size by mixing
* both lossy and lossless encoding.
*
* Use @profile to give the name of a profile to be embedded in the file.
* This does not affect the pixels which are written, just the way
* they are tagged. See vips_profile_load() for details on profile naming.
*
* Use the metadata items `loop` and `delay` to set the number of
* loops for the animation and the frame delays.
*
* The writer will attach ICC, EXIF and XMP metadata, unless @strip is set to
* %TRUE.
*
* See also: vips_webpload(), vips_image_write_to_file().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_webpsave( VipsImage *in, const char *filename, ... )
{
va_list ap;
int result;
va_start( ap, filename );
result = vips_call_split( "webpsave", ap, in, filename );
va_end( ap );
return( result );
}
/**
* vips_webpsave_buffer: (method)
* @in: image to save
* @buf: (out) (array length=len) (element-type guint8): return output buffer here
* @len: return output length here
* @...: %NULL-terminated list of optional named arguments
*
* Optional arguments:
*
* * @Q: %gint, quality factor
* * @lossless: %gboolean, enables lossless compression
* * @preset: #VipsForeignWebpPreset, choose lossy compression preset
* * @smart_subsample: %gboolean, enables high quality chroma subsampling
* * @near_lossless: %gboolean, preprocess in lossless mode (controlled by Q)
* * @alpha_q: %gint, set alpha quality in lossless mode
* * @effort: %gint, level of CPU effort to reduce file size
* * @min_size: %gboolean, minimise size
* * @mixed: %gboolean, allow both lossy and lossless encoding
* * @kmin: %gint, minimum number of frames between keyframes
* * @kmax: %gint, maximum number of frames between keyframes
* * @strip: %gboolean, remove all metadata from image
* * @profile: %gchararray, filename of ICC profile to attach
*
* As vips_webpsave(), but save to a memory buffer.
*
* The address of the buffer is returned in @buf, the length of the buffer in
* @len. You are responsible for freeing the buffer with g_free() when you
* are done with it.
*
* See also: vips_webpsave().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_webpsave_buffer( VipsImage *in, void **buf, size_t *len, ... )
{
va_list ap;
VipsArea *area;
int result;
area = NULL;
va_start( ap, len );
result = vips_call_split( "webpsave_buffer", ap, in, &area );
va_end( ap );
if( !result &&
area ) {
if( buf ) {
*buf = area->data;
area->free_fn = NULL;
}
if( len )
*len = area->length;
vips_area_unref( area );
}
return( result );
}
/**
* vips_webpsave_mime: (method)
* @in: image to save
* @...: %NULL-terminated list of optional named arguments
*
* Optional arguments:
*
* * @Q: %gint, quality factor
* * @lossless: %gboolean, enables lossless compression
* * @preset: #VipsForeignWebpPreset, choose lossy compression preset
* * @smart_subsample: %gboolean, enables high quality chroma subsampling
* * @near_lossless: %gboolean, preprocess in lossless mode (controlled by Q)
* * @alpha_q: %gint, set alpha quality in lossless mode
* * @effort: %gint, level of CPU effort to reduce file size
* * @min_size: %gboolean, minimise size
* * @mixed: %gboolean, allow both lossy and lossless encoding
* * @kmin: %gint, minimum number of frames between keyframes
* * @kmax: %gint, maximum number of frames between keyframes
* * @strip: %gboolean, remove all metadata from image
* * @profile: %gchararray, filename of ICC profile to attach
*
* As vips_webpsave(), but save as a mime webp on stdout.
*
* See also: vips_webpsave(), vips_image_write_to_file().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_webpsave_mime( VipsImage *in, ... )
{
va_list ap;
int result;
va_start( ap, in );
result = vips_call_split( "webpsave_mime", ap, in );
va_end( ap );
return( result );
}
/**
* vips_webpsave_target: (method)
* @in: image to save
* @target: save image to this target
* @...: %NULL-terminated list of optional named arguments
*
* Optional arguments:
*
* * @Q: %gint, quality factor
* * @lossless: %gboolean, enables lossless compression
* * @preset: #VipsForeignWebpPreset, choose lossy compression preset
* * @smart_subsample: %gboolean, enables high quality chroma subsampling
* * @near_lossless: %gboolean, preprocess in lossless mode (controlled by Q)
* * @alpha_q: %gint, set alpha quality in lossless mode
* * @effort: %gint, level of CPU effort to reduce file size
* * @min_size: %gboolean, minimise size
* * @mixed: %gboolean, allow both lossy and lossless encoding
* * @kmin: %gint, minimum number of frames between keyframes
* * @kmax: %gint, maximum number of frames between keyframes
* * @strip: %gboolean, remove all metadata from image
* * @profile: %gchararray, filename of ICC profile to attach
*
* As vips_webpsave(), but save to a target.
*
* See also: vips_webpsave().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_webpsave_target( VipsImage *in, VipsTarget *target, ... )
{
va_list ap;
int result;
va_start( ap, target );
result = vips_call_split( "webpsave_target", ap, in, target );
va_end( ap );
return( result );
}
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