add an experimental libspng reader
it compiles, but I've not tried running it yet heh
This commit is contained in:
John Cupitt
parent
a5680abbd6
commit
02327b6214
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@ -18,6 +18,7 @@
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- add all to smartcrop
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- flood fill could stop half-way for some very complex shapes
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- better handling of unaligned reads in multipage tiffs [petoor]
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- add experimental libspng reader
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24/4/20 started 8.9.3
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- better iiif tile naming [IllyaMoskvin]
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24
README.md
24
README.md
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@ -4,6 +4,30 @@
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[](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=2&q=proj:libvips)
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[](https://scan.coverity.com/projects/jcupitt-libvips)
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# This branch
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Is for experiemtning with [libspng](https://github.com/randy408/libspng).
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## Notes
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Build libspng:
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```
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cd libspng
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meson build --prefix=/home/john/vips --libdir=/home/john/vips/lib
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cd build
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ninja
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ninja install
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```
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Installs `spng.pc`.
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Sample code:
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https://github.com/randy408/libspng/blob/master/examples/example.c
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# Introduction
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libvips is a [demand-driven, horizontally
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threaded](https://github.com/libvips/libvips/wiki/Why-is-libvips-quick)
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image processing library. Compared to similar
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22
configure.ac
22
configure.ac
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@ -1175,6 +1175,22 @@ FIND_GIFLIB(
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]
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)
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# Look for libspng first
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AC_ARG_WITH([spng],
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AS_HELP_STRING([--without-spng], [build without libspng (default: test)]))
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if test x"$with_spng" != x"no"; then
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PKG_CHECK_MODULES(SPNG, spng >= 0.6,
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[AC_DEFINE(HAVE_SPNG,1,[define if you have libspng installed.])
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with_spng=yes
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PACKAGES_USED="$PACKAGES_USED spng"
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with_png=no
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],
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[
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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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AS_HELP_STRING([--without-png], [build without libpng (default: test)]))
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@ -1298,10 +1314,10 @@ if test x"$LIB_FUZZING_ENGINE" = x; then
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fi
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# Gather all up for VIPS_CFLAGS, VIPS_INCLUDES, VIPS_LIBS
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VIPS_CFLAGS="$VIPS_CFLAGS $GTHREAD_CFLAGS $GIO_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 $HEIF_CFLAGS"
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VIPS_CFLAGS="$VIPS_CFLAGS $GTHREAD_CFLAGS $GIO_CFLAGS $REQUIRED_CFLAGS $EXPAT_CFLAGS $ZLIB_CFLAGS $PANGOFT2_CFLAGS $GSF_CFLAGS $FFTW_CFLAGS $MAGICK_CFLAGS $JPEG_CFLAGS $SPNG_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 $HEIF_CFLAGS"
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VIPS_CFLAGS="$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 $GIO_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 $SPNG_LIBS $PNG_LIBS $IMAGEQUANT_LIBS $TIFF_LIBS $JPEG_LIBS $GTHREAD_LIBS $GIO_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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AC_SUBST(VIPS_LIBDIR)
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@ -1397,6 +1413,8 @@ file import with cfitsio: $with_cfitsio
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file import/export with libwebp: $with_libwebp
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(requires libwebp, libwebpmux, libwebpdemux 0.6.0 or later)
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text rendering with pangoft2: $with_pangoft2
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file import/export with libspng: $with_spng
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(requires libspng-0.6 or later)
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file import/export with libpng: $with_png
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(requires libpng-1.2.9 or later)
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support 8bpp PNG quantisation: $with_imagequant
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@ -39,6 +39,7 @@ libforeign_la_SOURCES = \
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magickload.c \
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magick7load.c \
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magicksave.c \
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spngload.c \
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pngload.c \
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pngsave.c \
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vipspng.c \
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@ -0,0 +1,674 @@
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/* load PNG with libspng
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*
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* 5/12/11
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* - from pngload.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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/* Notes:
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*
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* an enum for interlace_method would be nice ... ADAM7 == 1,
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* no interlace == 0.
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* an equivalent of png_sig_cmp() from libpng (is_a_png on a memory area)
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*/
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/*
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#define 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 <vips/vips.h>
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#include <vips/buf.h>
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#include <vips/internal.h>
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#include "pforeign.h"
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#ifdef HAVE_SPNG
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#include <spng.h>
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typedef struct _VipsForeignLoadPng {
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VipsForeignLoad parent_object;
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/* Set by subclasses.
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*/
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VipsSource *source;
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spng_ctx *ctx;
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struct spng_ihdr ihdr;
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enum spng_format fmt;
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int bands;
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VipsInterpretation interpretation;
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VipsBandFormat format;
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size_t out_size;
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size_t out_line_size;
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int y_pos;
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} VipsForeignLoadPng;
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typedef VipsForeignLoadClass VipsForeignLoadPngClass;
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G_DEFINE_ABSTRACT_TYPE( VipsForeignLoadPng, vips_foreign_load_png,
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VIPS_TYPE_FOREIGN_LOAD );
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static void
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vips_foreign_load_png_dispose( GObject *gobject )
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{
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VipsForeignLoadPng *png = (VipsForeignLoadPng *) gobject;
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VIPS_FREEF( spng_ctx_free, png->ctx );
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VIPS_UNREF( png->source );
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G_OBJECT_CLASS( vips_foreign_load_png_parent_class )->
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dispose( gobject );
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}
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/* libspng read callbacks should copy length bytes to dest and return 0
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* or SPNG_IO_EOF/SPNG_IO_ERROR on error.
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*/
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static int
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vips_foreign_load_png_stream( spng_ctx *ctx, void *user,
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void *dest, size_t length )
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{
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VipsSource *source = VIPS_SOURCE( user );
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gint64 bytes_read;
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bytes_read = vips_source_read( source, dest, length );
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if( bytes_read < 0 )
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return( SPNG_IO_ERROR );
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if( bytes_read < length )
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return( SPNG_IO_EOF);
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return( 0 );
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}
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static VipsForeignFlags
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vips_foreign_load_png_get_flags_source( VipsSource *source )
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{
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spng_ctx *ctx;
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struct spng_ihdr ihdr;
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VipsForeignFlags flags;
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ctx = spng_ctx_new( 0 );
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spng_set_crc_action( ctx, SPNG_CRC_USE, SPNG_CRC_USE );
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spng_set_png_stream( ctx,
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vips_foreign_load_png_stream, source );
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if( spng_get_ihdr( ctx, &ihdr ) ) {
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spng_ctx_free( ctx );
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return( 0 );
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}
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spng_ctx_free( ctx );
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flags = 0;
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if( ihdr.interlace_method != 0 )
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flags |= VIPS_FOREIGN_PARTIAL;
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else
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flags |= VIPS_FOREIGN_SEQUENTIAL;
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return( flags );
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}
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static VipsForeignFlags
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vips_foreign_load_png_get_flags( VipsForeignLoad *load )
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{
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VipsForeignLoadPng *png = (VipsForeignLoadPng *) load;
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return( vips_foreign_load_png_get_flags_source( png->source ) );
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}
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static VipsForeignFlags
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vips_foreign_load_png_get_flags_filename( const char *filename )
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{
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VipsSource *source;
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VipsForeignFlags flags;
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if( !(source = vips_source_new_from_file( filename )) )
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return( 0 );
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flags = vips_foreign_load_png_get_flags_source( source );
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VIPS_UNREF( source );
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return( flags );
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}
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static void
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vips_foreign_load_png_set_header( VipsForeignLoadPng *png, VipsImage *image )
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{
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vips_image_init_fields( image,
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png->ihdr.width, png->ihdr.height, png->bands,
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png->format, VIPS_CODING_NONE, png->interpretation,
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1.0, 1.0 );
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VIPS_SETSTR( image->filename,
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vips_connection_filename( VIPS_CONNECTION( png->source ) ) );
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/* 0 is no interlace.
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*/
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if( png->ihdr.interlace_method == 0 )
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/* Sequential mode needs thinstrip to work with things like
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* vips_shrink().
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*/
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vips_image_pipelinev( image,
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VIPS_DEMAND_STYLE_THINSTRIP, NULL );
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else
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/* Interlaced images are read via a huge memory buffer.
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*/
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vips_image_pipelinev( image, VIPS_DEMAND_STYLE_ANY, NULL );
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}
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static int
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vips_foreign_load_png_header( VipsForeignLoad *load )
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{
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( load );
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VipsForeignLoadPng *png = (VipsForeignLoadPng *) load;
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int error;
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/* Flags can be eg. SPNG_CTX_IGNORE_ADLER32 to ignore CRC chaekcs in
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* deflate.
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*
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* FIXME ... fail handling
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*/
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png->ctx = spng_ctx_new( 0 );
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spng_set_crc_action( png->ctx, SPNG_CRC_USE, SPNG_CRC_USE );
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spng_set_png_stream( png->ctx,
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vips_foreign_load_png_stream, png->source );
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if( (error = spng_get_ihdr( png->ctx, &png->ihdr )) ) {
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vips_error( class->nickname, "%s", spng_strerror( error ) );
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return( -1 );
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}
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printf(" width: %d\nheight: %d\nbit depth: %d\ncolor type: %d\n",
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png->ihdr.width, png->ihdr.height,
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png->ihdr.bit_depth, png->ihdr.color_type );
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printf( "compression method: %d\nfilter method: %d\n"
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"interlace method: %d\n",
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png->ihdr.compression_method, png->ihdr.filter_method,
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png->ihdr.interlace_method );
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switch( png->ihdr.color_type ) {
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case SPNG_COLOR_TYPE_GRAYSCALE:
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png->interpretation = VIPS_INTERPRETATION_B_W;
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png->bands = 1;
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break;
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case SPNG_COLOR_TYPE_GRAYSCALE_ALPHA:
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png->interpretation = VIPS_INTERPRETATION_B_W;
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png->bands = 2;
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break;
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case SPNG_COLOR_TYPE_TRUECOLOR:
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case SPNG_COLOR_TYPE_INDEXED:
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png->interpretation = VIPS_INTERPRETATION_sRGB;
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png->bands = 3;
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break;
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case SPNG_COLOR_TYPE_TRUECOLOR_ALPHA:
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png->interpretation = VIPS_INTERPRETATION_sRGB;
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png->bands = 4;
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break;
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default:
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vips_error( class->nickname, "%s", "unknown color_type" );
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return( -1 );
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}
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if( png->ihdr.bit_depth == 16 ) {
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png->fmt = SPNG_FMT_RGBA16;
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png->format = VIPS_FORMAT_USHORT;
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if( png->interpretation == VIPS_INTERPRETATION_B_W )
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png->interpretation = VIPS_INTERPRETATION_GREY16;
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if( png->interpretation == VIPS_INTERPRETATION_sRGB )
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png->interpretation = VIPS_INTERPRETATION_RGB16;
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}
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else {
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png->fmt = SPNG_FMT_RGBA8;
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png->format = VIPS_FORMAT_UCHAR;
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}
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/* FIXME ... get resolution.
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*/
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vips_source_minimise( png->source );
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vips_foreign_load_png_set_header( png, load->out );
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return( 0 );
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}
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static int
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vips_foreign_load_png_interlace( VipsForeignLoadPng *png, VipsImage *image )
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{
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/* FIXME ... load interlaced PNG to huge memory image.
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*/
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return( 0 );
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}
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static int
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vips_foreign_load_png_generate( VipsRegion *or,
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void *seq, void *a, void *b, gboolean *stop )
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{
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VipsRect *r = &or->valid;
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VipsForeignLoad *load = VIPS_FOREIGN_LOAD( a );
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VipsForeignLoadPng *png = (VipsForeignLoadPng *) load;
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( png );
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int y;
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int error;
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#ifdef DEBUG
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printf( "vips_foreign_load_png_generate: line %d, %d rows\n",
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r->top, r->height );
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printf( "vips_foreign_load_png_generate: y_top = %d\n", png->y_pos );
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#endif /*DEBUG*/
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/* We're inside a tilecache where tiles are the full image width, so
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* this should always be true.
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*/
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g_assert( r->left == 0 );
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g_assert( r->width == or->im->Xsize );
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g_assert( VIPS_RECT_BOTTOM( r ) <= or->im->Ysize );
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/* Tiles should always be a strip in height, unless it's the final
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* strip.
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*/
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g_assert( r->height == VIPS_MIN( VIPS__FATSTRIP_HEIGHT,
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or->im->Ysize - r->top ) );
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/* And check that y_pos is correct. It should be, since we are inside
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* a vips_sequential().
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*/
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if( r->top != png->y_pos ) {
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vips_error( class->nickname,
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_( "out of order read at line %d" ), png->y_pos );
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return( -1 );
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}
|
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|
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for( y = 0; y < r->height; y++ ) {
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error = spng_decode_row( png->ctx,
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VIPS_REGION_ADDR( or, 0, r->top + y ),
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VIPS_REGION_SIZEOF_LINE( or ) );
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|
||||
/* FIXME .. should allow SPNG_EOI here?
|
||||
*/
|
||||
if( error ) {
|
||||
/* We've failed to read some pixels. Knock this
|
||||
* operation out of cache.
|
||||
*/
|
||||
vips_operation_invalidate( VIPS_OPERATION( png ) );
|
||||
|
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#ifdef DEBUG
|
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printf( "vips_foreign_load_png_generate:\n" );
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printf( " spng_decode_row() failed, line %d\n",
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r->top + y );
|
||||
printf( " file %s\n", read->name );
|
||||
printf( " thread %p\n", g_thread_self() );
|
||||
#endif /*DEBUG*/
|
||||
|
||||
/* And bail if fail is on. We have to add an error
|
||||
* message, since the handler we install just does
|
||||
* g_warning().
|
||||
*/
|
||||
if( load->fail ) {
|
||||
vips_error( class->nickname,
|
||||
"%s", _( "libpng read error" ) );
|
||||
return( -1 );
|
||||
}
|
||||
}
|
||||
|
||||
png->y_pos += 1;
|
||||
}
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static int
|
||||
vips_foreign_load_png_load( VipsForeignLoad *load )
|
||||
{
|
||||
VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( load );
|
||||
VipsForeignLoadPng *png = (VipsForeignLoadPng *) load;
|
||||
VipsImage **t = (VipsImage **)
|
||||
vips_object_local_array( VIPS_OBJECT( load ), 3 );
|
||||
|
||||
int error;
|
||||
|
||||
if( (error = spng_decoded_image_size( png->ctx,
|
||||
png->fmt, &png->out_size )) ) {
|
||||
vips_error( class->nickname, "%s", spng_strerror( error ) );
|
||||
return( -1 );
|
||||
}
|
||||
png->out_line_size = png->out_size / png->ihdr.height;
|
||||
|
||||
/* Initialize for progressive decoding.
|
||||
*/
|
||||
if( (error = spng_decode_image( png->ctx, NULL, 0,
|
||||
png->fmt, SPNG_DECODE_PROGRESSIVE )) ) {
|
||||
vips_error( class->nickname, "%s", spng_strerror( error ) );
|
||||
return( -1 );
|
||||
}
|
||||
|
||||
t[0] = vips_image_new_memory();
|
||||
vips_foreign_load_png_set_header( png, t[0] );
|
||||
if( vips_source_decode( png->source ) )
|
||||
return( -1 );
|
||||
|
||||
if( png->ihdr.interlace_method != 0 ) {
|
||||
/* Arg awful interlaced image. We have to load to a huge mem
|
||||
* buffer, then copy to out.
|
||||
*/
|
||||
if( vips_foreign_load_png_interlace( png, t[0] ) ||
|
||||
vips_image_write( t[0], load->real ) )
|
||||
return( -1 );
|
||||
}
|
||||
else {
|
||||
if( vips_image_generate( t[0],
|
||||
NULL, vips_foreign_load_png_generate, NULL,
|
||||
read, NULL ) ||
|
||||
vips_sequential( t[0], &t[1],
|
||||
"tile_height", VIPS__FATSTRIP_HEIGHT,
|
||||
NULL ) ||
|
||||
vips_image_write( t[1], load->real ) )
|
||||
return( -1 );
|
||||
}
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_class_init( VipsForeignLoadPngClass *class )
|
||||
{
|
||||
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
|
||||
VipsObjectClass *object_class = (VipsObjectClass *) class;
|
||||
VipsForeignClass *foreign_class = (VipsForeignClass *) class;
|
||||
VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
|
||||
|
||||
gobject_class->dispose = vips_foreign_load_png_dispose;
|
||||
|
||||
object_class->nickname = "pngload_base";
|
||||
object_class->description = _( "load png base class" );
|
||||
|
||||
/* We are fast at is_a(), so high priority.
|
||||
*/
|
||||
foreign_class->priority = 200;
|
||||
|
||||
load_class->get_flags_filename =
|
||||
vips_foreign_load_png_get_flags_filename;
|
||||
load_class->get_flags = vips_foreign_load_png_get_flags;
|
||||
load_class->header = vips_foreign_load_png_header;
|
||||
load_class->load = vips_foreign_load_png_load;
|
||||
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_init( VipsForeignLoadPng *png )
|
||||
{
|
||||
}
|
||||
|
||||
typedef struct _VipsForeignLoadPngSource {
|
||||
VipsForeignLoadPng parent_object;
|
||||
|
||||
/* Load from a source.
|
||||
*/
|
||||
VipsSource *source;
|
||||
|
||||
} VipsForeignLoadPngSource;
|
||||
|
||||
typedef VipsForeignLoadPngClass VipsForeignLoadPngSourceClass;
|
||||
|
||||
G_DEFINE_TYPE( VipsForeignLoadPngSource, vips_foreign_load_png_source,
|
||||
vips_foreign_load_png_get_type() );
|
||||
|
||||
static int
|
||||
vips_foreign_load_png_source_build( VipsObject *object )
|
||||
{
|
||||
VipsForeignLoadPng *png = (VipsForeignLoadPng *) object;
|
||||
VipsForeignLoadPngSource *source = (VipsForeignLoadPngSource *) object;
|
||||
|
||||
if( source->source ) {
|
||||
png->source = source->source;
|
||||
g_object_ref( png->source );
|
||||
}
|
||||
|
||||
if( VIPS_OBJECT_CLASS( vips_foreign_load_png_source_parent_class )->
|
||||
build( object ) )
|
||||
return( -1 );
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static gboolean
|
||||
vips_foreign_load_png_source_is_a_source( VipsSource *source )
|
||||
{
|
||||
static unsigned char signature[8] = { 137, 80, 78, 71, 13, 10, 26, 10 };
|
||||
|
||||
const unsigned char *p;
|
||||
|
||||
if( (p = vips_source_sniff( source, 8 )) &&
|
||||
memcmp( p, signature, 8 ) == 0 )
|
||||
return( TRUE );
|
||||
|
||||
return( FALSE );
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_source_class_init( VipsForeignLoadPngSourceClass *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 = "pngload_source";
|
||||
object_class->description = _( "load png from source" );
|
||||
object_class->build = vips_foreign_load_png_source_build;
|
||||
|
||||
load_class->is_a_source = vips_foreign_load_png_source_is_a_source;
|
||||
|
||||
VIPS_ARG_OBJECT( class, "source", 1,
|
||||
_( "Source" ),
|
||||
_( "Source to load from" ),
|
||||
VIPS_ARGUMENT_REQUIRED_INPUT,
|
||||
G_STRUCT_OFFSET( VipsForeignLoadPngSource, source ),
|
||||
VIPS_TYPE_SOURCE );
|
||||
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_source_init( VipsForeignLoadPngSource *source )
|
||||
{
|
||||
}
|
||||
|
||||
typedef struct _VipsForeignLoadPngFile {
|
||||
VipsForeignLoadPng parent_object;
|
||||
|
||||
/* Filename for load.
|
||||
*/
|
||||
char *filename;
|
||||
|
||||
} VipsForeignLoadPngFile;
|
||||
|
||||
typedef VipsForeignLoadPngClass VipsForeignLoadPngFileClass;
|
||||
|
||||
G_DEFINE_TYPE( VipsForeignLoadPngFile, vips_foreign_load_png_file,
|
||||
vips_foreign_load_png_get_type() );
|
||||
|
||||
static int
|
||||
vips_foreign_load_png_file_build( VipsObject *object )
|
||||
{
|
||||
VipsForeignLoadPng *png = (VipsForeignLoadPng *) object;
|
||||
VipsForeignLoadPngFile *file = (VipsForeignLoadPngFile *) object;
|
||||
|
||||
if( file->filename &&
|
||||
!(png->source = vips_source_new_from_file( file->filename )) )
|
||||
return( -1 );
|
||||
|
||||
if( VIPS_OBJECT_CLASS( vips_foreign_load_png_file_parent_class )->
|
||||
build( object ) )
|
||||
return( -1 );
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static gboolean
|
||||
vips_foreign_load_png_file_is_a( const char *filename )
|
||||
{
|
||||
VipsSource *source;
|
||||
gboolean result;
|
||||
|
||||
if( !(source = vips_source_new_from_file( filename )) )
|
||||
return( FALSE );
|
||||
result = vips_foreign_load_png_source_is_a_source( source );
|
||||
VIPS_UNREF( source );
|
||||
|
||||
return( result );
|
||||
}
|
||||
|
||||
const char *vips_foreign_load_png_file_suffs[] = { ".png", NULL };
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_file_class_init( VipsForeignLoadPngFileClass *class )
|
||||
{
|
||||
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
|
||||
VipsObjectClass *object_class = (VipsObjectClass *) class;
|
||||
VipsForeignClass *foreign_class = (VipsForeignClass *) 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 = "pngload";
|
||||
object_class->description = _( "load png from file" );
|
||||
object_class->build = vips_foreign_load_png_file_build;
|
||||
|
||||
foreign_class->suffs = vips_foreign_load_png_file_suffs;
|
||||
|
||||
load_class->is_a = vips_foreign_load_png_file_is_a;
|
||||
|
||||
VIPS_ARG_STRING( class, "filename", 1,
|
||||
_( "Filename" ),
|
||||
_( "Filename to load from" ),
|
||||
VIPS_ARGUMENT_REQUIRED_INPUT,
|
||||
G_STRUCT_OFFSET( VipsForeignLoadPngFile, filename ),
|
||||
NULL );
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_file_init( VipsForeignLoadPngFile *file )
|
||||
{
|
||||
}
|
||||
|
||||
typedef struct _VipsForeignLoadPngBuffer {
|
||||
VipsForeignLoadPng parent_object;
|
||||
|
||||
/* Load from a buffer.
|
||||
*/
|
||||
VipsBlob *blob;
|
||||
|
||||
} VipsForeignLoadPngBuffer;
|
||||
|
||||
typedef VipsForeignLoadPngClass VipsForeignLoadPngBufferClass;
|
||||
|
||||
G_DEFINE_TYPE( VipsForeignLoadPngBuffer, vips_foreign_load_png_buffer,
|
||||
vips_foreign_load_png_get_type() );
|
||||
|
||||
static int
|
||||
vips_foreign_load_png_buffer_build( VipsObject *object )
|
||||
{
|
||||
VipsForeignLoadPng *png = (VipsForeignLoadPng *) object;
|
||||
VipsForeignLoadPngBuffer *buffer = (VipsForeignLoadPngBuffer *) object;
|
||||
|
||||
if( buffer->blob &&
|
||||
!(png->source = vips_source_new_from_memory(
|
||||
VIPS_AREA( buffer->blob )->data,
|
||||
VIPS_AREA( buffer->blob )->length )) )
|
||||
return( -1 );
|
||||
|
||||
if( VIPS_OBJECT_CLASS( vips_foreign_load_png_buffer_parent_class )->
|
||||
build( object ) )
|
||||
return( -1 );
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static gboolean
|
||||
vips_foreign_load_png_buffer_is_a_buffer( const void *buf, size_t len )
|
||||
{
|
||||
VipsSource *source;
|
||||
gboolean result;
|
||||
|
||||
if( !(source = vips_source_new_from_memory( buf, len )) )
|
||||
return( FALSE );
|
||||
result = vips_foreign_load_png_source_is_a_source( source );
|
||||
VIPS_UNREF( source );
|
||||
|
||||
return( result );
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_buffer_class_init( VipsForeignLoadPngBufferClass *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 = "pngload_buffer";
|
||||
object_class->description = _( "load png from buffer" );
|
||||
object_class->build = vips_foreign_load_png_buffer_build;
|
||||
|
||||
load_class->is_a_buffer = vips_foreign_load_png_buffer_is_a_buffer;
|
||||
|
||||
VIPS_ARG_BOXED( class, "buffer", 1,
|
||||
_( "Buffer" ),
|
||||
_( "Buffer to load from" ),
|
||||
VIPS_ARGUMENT_REQUIRED_INPUT,
|
||||
G_STRUCT_OFFSET( VipsForeignLoadPngBuffer, blob ),
|
||||
VIPS_TYPE_BLOB );
|
||||
|
||||
}
|
||||
|
||||
static void
|
||||
vips_foreign_load_png_buffer_init( VipsForeignLoadPngBuffer *buffer )
|
||||
{
|
||||
}
|
||||
|
||||
#endif /*HAVE_SPNG*/
|
||||
Loading…
Reference in New Issue