reinstate libnsgif loader
only 1/2 done
This commit is contained in:
John Cupitt
parent
6fa1b7cbf5
commit
1d77a57780
41
configure.ac
41
configure.ac
@ -1193,14 +1193,34 @@ if test x"$with_tiff" != x"no"; then
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INCLUDES="$save_INCLUDES"
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fi
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# giflib
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FIND_GIFLIB(
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[with_giflib="yes (found by search)"
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],
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[AC_MSG_WARN([giflib not found; disabling direct GIF support])
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with_giflib=no
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]
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)
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# libnsgif
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# search for libnsgif with pkg-config, see https://github.com/jcupitt/libnsgif
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AC_ARG_WITH([libnsgif],
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AS_HELP_STRING([--without-libnsgif],
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[build without libnsgif (default: test)]))
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if test x"$with_libnsgif" != x"no"; then
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PKG_CHECK_MODULES(LIBNSGIF, libnsgif,
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[AC_DEFINE(HAVE_LIBNSGIF,1,[define if you have libnsgif installed.])
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with_libnsgif="yes"
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with_giflib="no (using libnsgif)"
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PACKAGES_USED="$PACKAGES_USED libnsgif"
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],
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[with_libnsgif="no"
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]
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)
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fi
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# giflib if no libnsgif
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if test x"$with_libnsgif" != x"yes"; then
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FIND_GIFLIB(
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[with_giflib="yes (found by search)"
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],
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[AC_MSG_WARN([giflib not found; disabling direct GIF support])
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with_giflib=no
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]
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)
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fi
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# look for PNG with pkg-config ... fall back to our tester
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AC_ARG_WITH([png],
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@ -1327,14 +1347,14 @@ fi
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# Gather all up for VIPS_CFLAGS, VIPS_INCLUDES, VIPS_LIBS
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# sort includes to get longer, more specific dirs first
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# helps, for example, selecting graphicsmagick over imagemagick
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VIPS_CFLAGS=`for i in $VIPS_CFLAGS $GTHREAD_CFLAGS $REQUIRED_CFLAGS $EXPAT_CFLAGS $ZLIB_CFLAGS $PANGOFT2_CFLAGS $GSF_CFLAGS $FFTW_CFLAGS $MAGICK_CFLAGS $JPEG_CFLAGS $PNG_CFLAGS $IMAGEQUANT_CFLAGS $EXIF_CFLAGS $MATIO_CFLAGS $CFITSIO_CFLAGS $LIBWEBP_CFLAGS $LIBWEBPMUX_CFLAGS $GIFLIB_INCLUDES $RSVG_CFLAGS $PDFIUM_INCLUDES $POPPLER_CFLAGS $OPENEXR_CFLAGS $OPENSLIDE_CFLAGS $ORC_CFLAGS $TIFF_CFLAGS $LCMS_CFLAGS $HEIF_CFLAGS
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VIPS_CFLAGS=`for i in $VIPS_CFLAGS $GTHREAD_CFLAGS $REQUIRED_CFLAGS $EXPAT_CFLAGS $ZLIB_CFLAGS $PANGOFT2_CFLAGS $GSF_CFLAGS $FFTW_CFLAGS $MAGICK_CFLAGS $JPEG_CFLAGS $PNG_CFLAGS $IMAGEQUANT_CFLAGS $EXIF_CFLAGS $MATIO_CFLAGS $CFITSIO_CFLAGS $LIBWEBP_CFLAGS $LIBWEBPMUX_CFLAGS $LIBNSGIF_CFLAGS $GIFLIB_INCLUDES $RSVG_CFLAGS $PDFIUM_INCLUDES $POPPLER_CFLAGS $OPENEXR_CFLAGS $OPENSLIDE_CFLAGS $ORC_CFLAGS $TIFF_CFLAGS $LCMS_CFLAGS $HEIF_CFLAGS
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do
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echo $i
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done | sort -ru`
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VIPS_CFLAGS=`echo $VIPS_CFLAGS`
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VIPS_CFLAGS="$VIPS_DEBUG_FLAGS $VIPS_CFLAGS"
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VIPS_INCLUDES="$ZLIB_INCLUDES $PNG_INCLUDES $TIFF_INCLUDES $JPEG_INCLUDES $NIFTI_INCLUDES"
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VIPS_LIBS="$ZLIB_LIBS $HEIF_LIBS $MAGICK_LIBS $PNG_LIBS $IMAGEQUANT_LIBS $TIFF_LIBS $JPEG_LIBS $GTHREAD_LIBS $REQUIRED_LIBS $EXPAT_LIBS $PANGOFT2_LIBS $GSF_LIBS $FFTW_LIBS $ORC_LIBS $LCMS_LIBS $GIFLIB_LIBS $RSVG_LIBS $NIFTI_LIBS $PDFIUM_LIBS $POPPLER_LIBS $OPENEXR_LIBS $OPENSLIDE_LIBS $CFITSIO_LIBS $LIBWEBP_LIBS $LIBWEBPMUX_LIBS $MATIO_LIBS $EXIF_LIBS -lm"
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VIPS_LIBS="$ZLIB_LIBS $HEIF_LIBS $MAGICK_LIBS $PNG_LIBS $IMAGEQUANT_LIBS $TIFF_LIBS $JPEG_LIBS $GTHREAD_LIBS $REQUIRED_LIBS $EXPAT_LIBS $PANGOFT2_LIBS $GSF_LIBS $FFTW_LIBS $ORC_LIBS $LCMS_LIBS $LIBNSGIF_LIBS $GIFLIB_LIBS $RSVG_LIBS $NIFTI_LIBS $PDFIUM_LIBS $POPPLER_LIBS $OPENEXR_LIBS $OPENSLIDE_LIBS $CFITSIO_LIBS $LIBWEBP_LIBS $LIBWEBPMUX_LIBS $MATIO_LIBS $EXIF_LIBS -lm"
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AC_SUBST(VIPS_LIBDIR)
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@ -1434,6 +1454,7 @@ file import/export with libpng: $with_png
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support 8bpp PNG quantisation: $with_imagequant
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(requires libimagequant)
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file import/export with libtiff: $with_tiff
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file import/export with libnsgif: $with_libnsgif
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file import/export with giflib: $with_giflib
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file import/export with libjpeg: $with_jpeg
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image pyramid export: $with_gsf
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@ -8,6 +8,7 @@ libforeign_la_SOURCES = \
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niftisave.c \
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quantise.c \
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exif.c \
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gifnsload.c \
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gifload.c \
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cairo.c \
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pdfload.c \
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462
libvips/foreign/gifnsload.c
Normal file
462
libvips/foreign/gifnsload.c
Normal file
@ -0,0 +1,462 @@
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/* load a GIF with libnsgif
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*
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* 6/10/18
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* - from gifload.c
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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/*
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#define VIPS_DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include <vips/vips.h>
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#include <vips/buf.h>
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#include <vips/internal.h>
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#include <vips/debug.h>
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#ifdef HAVE_LIBNSGIF
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#include <libnsgif/libnsgif.h>
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typedef struct _VipsForeignLoadGif {
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VipsForeignLoad parent_object;
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/* Load this page (frame number).
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*/
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int page;
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/* Load this many pages.
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*/
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int n;
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/* The animation created by libnsgif.
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*/
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gif_animation *gif;
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/* The data/size pair we pass to libnsgif.
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*/
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size_t size;
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unsigned char *data;
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} VipsForeignLoadGif;
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typedef VipsForeignLoadClass VipsForeignLoadGifClass;
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G_DEFINE_ABSTRACT_TYPE( VipsForeignLoadGif, vips_foreign_load_gif,
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VIPS_TYPE_FOREIGN_LOAD );
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static const char *
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vips_foreign_load_gif_errstr( gif_result result )
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{
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switch( result ) {
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case GIF_WORKING:
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return( _( "Working" ) );
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case GIF_OK:
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return( _( "OK" ) );
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case GIF_INSUFFICIENT_FRAME_DATA:
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return( _( "Insufficient data to complete frame" ) );
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case GIF_FRAME_DATA_ERROR:
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return( _( "GIF frame data error" ) );
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case GIF_INSUFFICIENT_DATA:
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return( _( "Insufficient data to do anything" ) );
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case GIF_DATA_ERROR:
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return( _( "GIF header data error" ) );
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case GIF_INSUFFICIENT_MEMORY:
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return( _( "Insuficient memory to process" ) );
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case GIF_FRAME_NO_DISPLAY:
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return( _( "No display" ) );
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case GIF_END_OF_FRAME:
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return( _( "At end of frame" ) );
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default:
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return( _( "Unknown error" ) );
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}
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}
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static void
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vips_foreign_load_gif_dispose( GObject *gobject )
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{
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VipsForeignLoadGif *gif = (VipsForeignLoadGif *) gobject;
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VIPS_FREEF( gif_finalise, gif->gif );
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G_OBJECT_CLASS( vips_foreign_load_gif_parent_class )->
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dispose( gobject );
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}
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static VipsForeignFlags
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vips_foreign_load_gif_get_flags_filename( const char *filename )
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{
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/* We can render any part of the image on demand.
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*/
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return( VIPS_FOREIGN_PARTIAL );
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}
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static VipsForeignFlags
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vips_foreign_load_gif_get_flags( VipsForeignLoad *load )
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{
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return( VIPS_FOREIGN_PARTIAL );
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}
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static gboolean
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vips_foreign_load_gif_is_a_buffer( const void *buf, size_t len )
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{
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const guchar *str = (const guchar *) buf;
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if( len >= 4 &&
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str[0] == 'G' &&
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str[1] == 'I' &&
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str[2] == 'F' &&
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str[3] == '8' )
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return( 1 );
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return( 0 );
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}
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static gboolean
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vips_foreign_load_gif_is_a( const char *filename )
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{
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unsigned char buf[4];
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if( vips__get_bytes( filename, buf, 4 ) == 4 &&
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vips_foreign_load_gif_is_a_buffer( buf, 4 ) )
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return( 1 );
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return( 0 );
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}
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static void *
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vips_foreign_load_gif_bitmap_create( int width, int height )
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{
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/* ensure a stupidly large bitmap is not created */
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return calloc(width * height, 4);
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}
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static void
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vips_foreign_load_gif_bitmap_set_opaque( void *bitmap, bool opaque )
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{
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(void) opaque; /* unused */
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(void) bitmap; /* unused */
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g_assert(bitmap);
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}
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static bool
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vips_foreign_load_gif_bitmap_test_opaque( void *bitmap )
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{
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(void) bitmap; /* unused */
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g_assert(bitmap);
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return false;
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}
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static unsigned char *
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vips_foreign_load_gif_bitmap_get_buffer( void *bitmap )
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{
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g_assert(bitmap);
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return bitmap;
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}
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static void
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vips_foreign_load_gif_bitmap_destroy( void *bitmap )
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{
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g_assert(bitmap);
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free(bitmap);
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}
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static void
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vips_foreign_load_gif_bitmap_modified( void *bitmap )
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{
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(void) bitmap; /* unused */
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g_assert(bitmap);
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return;
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}
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static gif_bitmap_callback_vt vips_foreign_load_gif_bitmap_callbacks = {
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vips_foreign_load_gif_bitmap_create,
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vips_foreign_load_gif_bitmap_destroy,
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vips_foreign_load_gif_bitmap_get_buffer,
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vips_foreign_load_gif_bitmap_set_opaque,
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vips_foreign_load_gif_bitmap_test_opaque,
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vips_foreign_load_gif_bitmap_modified
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};
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static int
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vips_foreign_load_gif_load( VipsForeignLoad *load )
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{
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VipsForeignLoadGif *gif = (VipsForeignLoadGif *) load;
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VipsImage **t = (VipsImage **)
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vips_object_local_array( VIPS_OBJECT( load ), 4 );
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gif_result result;
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VipsImage *im;
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if( !(gif->gif = VIPS_NEW( load, gif_animation )) )
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return( -1 );
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gif_create( gif->gif, &vips_foreign_load_gif_bitmap_callbacks );
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/* Decode entire GIF.
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*
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* FIXME ... add progressive decode.
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*
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* FIXME ... only decode as far as we need for the selected page
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*
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*/
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do {
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result = gif_initialise( gif->gif, gif->size, gif->data );
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if( result != GIF_OK &&
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result != GIF_WORKING )
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return 1;
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} while( result != GIF_OK );
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/* Render from libnsgif memory areas into output image.
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*/
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return( 0 );
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}
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static void
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vips_foreign_load_gif_class_init( VipsForeignLoadGifClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
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gobject_class->dispose = vips_foreign_load_gif_dispose;
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "gifload_base";
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object_class->description = _( "load GIF with libnsgif" );
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load_class->get_flags_filename =
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vips_foreign_load_gif_get_flags_filename;
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load_class->get_flags = vips_foreign_load_gif_get_flags;
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VIPS_ARG_INT( class, "page", 10,
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_( "Page" ),
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_( "Load this page from the file" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadGif, page ),
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0, 100000, 0 );
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VIPS_ARG_INT( class, "n", 6,
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_( "n" ),
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_( "Load this many pages" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadGif, n ),
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-1, 100000, 1 );
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}
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static void
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vips_foreign_load_gif_init( VipsForeignLoadGif *gif )
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{
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gif->n = 1;
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}
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typedef struct _VipsForeignLoadGifFile {
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VipsForeignLoadGif parent_object;
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/* Filename for load.
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*/
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char *filename;
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} VipsForeignLoadGifFile;
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typedef VipsForeignLoadGifClass VipsForeignLoadGifFileClass;
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G_DEFINE_TYPE( VipsForeignLoadGifFile, vips_foreign_load_gif_file,
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vips_foreign_load_gif_get_type() );
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static int
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vips_foreign_load_gif_file_header( VipsForeignLoad *load )
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{
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VipsForeignLoadGif *gif = (VipsForeignLoadGif *) load;
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VipsForeignLoadGifFile *file = (VipsForeignLoadGifFile *) load;
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/* mmap the file.
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*/
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if( vips_rawload( filename, &t[0],
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out->Xsize, out->Ysize, VIPS_IMAGE_SIZEOF_PEL( out ),
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"offset", header_offset,
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NULL ) ||
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if( vips_foreign_load_gif_open( gif, file->filename ) )
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return( -1 );
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VIPS_SETSTR( load->out->filename, file->filename );
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return( vips_foreign_load_gif_load( load ) );
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}
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static const char *vips_foreign_gif_suffs[] = {
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".gif",
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NULL
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};
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static void
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vips_foreign_load_gif_file_class_init(
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VipsForeignLoadGifFileClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsForeignClass *foreign_class = (VipsForeignClass *) class;
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VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "gifload";
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object_class->description = _( "load GIF with libnsgif" );
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foreign_class->suffs = vips_foreign_gif_suffs;
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load_class->is_a = vips_foreign_load_gif_is_a;
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load_class->header = vips_foreign_load_gif_file_header;
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VIPS_ARG_STRING( class, "filename", 1,
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_( "Filename" ),
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_( "Filename to load from" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadGifFile, filename ),
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NULL );
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}
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static void
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vips_foreign_load_gif_file_init( VipsForeignLoadGifFile *file )
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{
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}
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typedef struct _VipsForeignLoadGifBuffer {
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VipsForeignLoadGif parent_object;
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/* Load from a buffer.
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*/
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||||
VipsArea *buf;
|
||||
|
||||
/* Current read point, bytes left in buffer.
|
||||
*/
|
||||
VipsPel *p;
|
||||
size_t bytes_to_go;
|
||||
|
||||
} VipsForeignLoadGifBuffer;
|
||||
|
||||
typedef VipsForeignLoadGifClass VipsForeignLoadGifBufferClass;
|
||||
|
||||
G_DEFINE_TYPE( VipsForeignLoadGifBuffer, vips_foreign_load_gif_buffer,
|
||||
vips_foreign_load_gif_get_type() );
|
||||
|
||||
/* Callback from the gif loader.
|
||||
*
|
||||
* Read up to len bytes into buffer, return number of bytes read, 0 for EOF.
|
||||
*/
|
||||
static int
|
||||
vips_giflib_buffer_read( GifFileType *file, GifByteType *buf, int n )
|
||||
{
|
||||
VipsForeignLoadGifBuffer *buffer =
|
||||
(VipsForeignLoadGifBuffer *) file->UserData;
|
||||
size_t will_read = VIPS_MIN( n, buffer->bytes_to_go );
|
||||
|
||||
memcpy( buf, buffer->p, will_read );
|
||||
buffer->p += will_read;
|
||||
buffer->bytes_to_go -= will_read;
|
||||
|
||||
return( will_read );
|
||||
}
|
||||
|
||||
static int
|
||||
vips_foreign_load_gif_buffer_header( VipsForeignLoad *load )
|
||||
{
|
||||
VipsForeignLoadGif *gif = (VipsForeignLoadGif *) load;
|
||||
VipsForeignLoadGifBuffer *buffer = (VipsForeignLoadGifBuffer *) load;
|
||||
|
||||
/* Init the read point.
|
||||
*/
|
||||
buffer->p = buffer->buf->data;
|
||||
buffer->bytes_to_go = buffer->buf->length;
|
||||
|
||||
if( vips_foreign_load_gif_open_buffer( gif, vips_giflib_buffer_read ) )
|
||||
return( -1 );
|
||||
|
||||
return( vips_foreign_load_gif_load( load ) );
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_gif_buffer_class_init(
|
||||
VipsForeignLoadGifBufferClass *class )
|
||||
{
|
||||
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
|
||||
VipsObjectClass *object_class = (VipsObjectClass *) class;
|
||||
VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
|
||||
|
||||
gobject_class->set_property = vips_object_set_property;
|
||||
gobject_class->get_property = vips_object_get_property;
|
||||
|
||||
object_class->nickname = "gifload_buffer";
|
||||
object_class->description = _( "load GIF with libnsgif" );
|
||||
|
||||
load_class->is_a_buffer = vips_foreign_load_gif_is_a_buffer;
|
||||
load_class->header = vips_foreign_load_gif_buffer_header;
|
||||
|
||||
VIPS_ARG_BOXED( class, "buffer", 1,
|
||||
_( "Buffer" ),
|
||||
_( "Buffer to load from" ),
|
||||
VIPS_ARGUMENT_REQUIRED_INPUT,
|
||||
G_STRUCT_OFFSET( VipsForeignLoadGifBuffer, buf ),
|
||||
VIPS_TYPE_BLOB );
|
||||
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_gif_buffer_init( VipsForeignLoadGifBuffer *buffer )
|
||||
{
|
||||
}
|
||||
|
||||
#endif /*HAVE_LIBNSGIF*/
|
||||
Loading…
Reference in New Issue
Block a user