3561 lines
89 KiB
C
3561 lines
89 KiB
C
/* vips image class
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*
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* 4/2/11
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* - hacked up from various places
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* 6/6/13
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* - vips_image_write() didn't ref non-partial sources
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* 18/4/15
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* - add vips_image_copy_memory()
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* 25/11/15
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* - add vips_image_new_from_memory_copy()
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* 10/6/16
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* - vips_image_write() does not ref input for non-partial images
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* 29/10/16
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* - add vips_image_hasalpha()
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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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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /*HAVE_UNISTD_H*/
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#include <ctype.h>
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#include <vips/vips.h>
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#include <vips/internal.h>
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#include <vips/debug.h>
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/**
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* SECTION: image
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* @short_description: the VIPS image class
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* @stability: Stable
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* @see_also: <link linkend="libvips-header">header</link>
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* <link linkend="VipsRegion">VipsRegion</link>
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* <link linkend="libvips-generate">generate</link>
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* <link linkend="VipsOperation">VipsOperation</link>
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* @include: vips/vips.h
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*
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* The image class and associated types and macros.
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*
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* Images can be created from formatted files on disc, from C-style arrays on
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* disc, from formatted areas of memory, or from C-style arrays in memory. See
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* vips_image_new_from_file() and friends.
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* Creating an image is fast. VIPS reads just enough of
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* the image to be able to get the various properties, such as width in
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* pixels. It delays reading any pixels until they are really needed.
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*
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* Once you have an image, you can get properties from it in the usual way.
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* You can use projection functions, like vips_image_get_width() or
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* g_object_get(), to get %GObject properties.
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*
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* VIPS images are three-dimensional arrays, the dimensions being width,
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* height and bands. Each dimension can be up to 2 ** 31 pixels (or band
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* elements). An image has a format, meaning the machine number type used
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* to represent each value. VIPS supports 10 formats, from 8-bit unsigned
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* integer up to 128-bit double complex, see vips_image_get_format().
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*
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* In VIPS, images are uninterpreted arrays, meaning that from the point of
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* view of most operations, they are just large collections of numbers.
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* There's no difference between an RGBA (RGB with alpha) image and a CMYK
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* image, for example, they are both just four-band images. It's up to the
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* user of the library to pass the right sort of image to each operation.
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*
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* To take an example, VIPS has vips_Lab2XYZ(), an operation to transform
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* an image from CIE LAB colour space to CIE XYZ space. It assumes the
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* first three bands represent pixels in LAB colour space and returns an
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* image where the first three bands are transformed to XYZ and any
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* remaining bands are just copied. Pass it a RGB image by mistake and
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* you'll just get nonsense.
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*
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* VIPS has a feature to help (a little) with this: it sets a
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* #VipsInterpretation hint for each image (see
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* vips_image_get_interpretation()); a hint which says how pixels should
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* be interpreted. For example, vips_Lab2XYZ() will set the
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* interpretation of the output image to #VIPS_INTERPRETATION_XYZ. A
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* few utility operations will also use interpretation as a guide. For
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* example, you can give vips_colourspace() an input image and a desired
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* colourspace and it will use the input's interpretation hint to apply
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* the best sequence of colourspace transforms to get to the desired space.
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*
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* Use things like vips_invert() to manipulate your images. When you are done,
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* you can write images to disc files (with vips_image_write_to_file()),
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* to formatted memory buffers (with vips_image_write_to_buffer()) and to
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* C-style memory arrays (with vips_image_write_to_memory().
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*
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* You can also write image to other images. Create, for example, a temporary
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* disc image with vips_image_new_temp_file(), then write your image to that
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* with vips_image_write(). You can create several other types of image and
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* write to them, see vips_image_new_memory(), for example.
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*
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* See <link linkend="VipsOperation">operation</link> for an introduction to
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* running operations on images, see <link
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* linkend="libvips-header">header</link> for getting and setting image
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* metadata. See <link linkend="VipsObject">object</link> for a discussion of
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* the lower levels.
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*/
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/**
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* VIPS_MAGIC_INTEL:
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*
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* The first four bytes of a VIPS file in Intel byte ordering.
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*/
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/**
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* VIPS_MAGIC_SPARC:
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*
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* The first four bytes of a VIPS file in SPARC byte ordering.
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*/
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/**
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* VipsAccess:
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* @VIPS_ACCESS_RANDOM: can read anywhere
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* @VIPS_ACCESS_SEQUENTIAL: top-to-bottom reading only, but with a small buffer
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* @VIPS_ACCESS_SEQUENTIAL_UNBUFFERED: top-to-bottom reading only
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*
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* The type of access an operation has to supply. See vips_tilecache()
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* and #VipsForeign.
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*
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* @VIPS_ACCESS_RANDOM means requests can come in any order.
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*
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* @VIPS_ACCESS_SEQUENTIAL means requests will be top-to-bottom, but with some
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* amount of buffering behind the read point for small non-local accesses.
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*
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* @VIPS_ACCESS_SEQUENTIAL_UNBUFFERED means requests will be strictly
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* top-to-bottom with no read-behind. This can save some memory.
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*/
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/**
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* VipsDemandStyle:
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* @VIPS_DEMAND_STYLE_SMALLTILE: demand in small (typically 64x64 pixel) tiles
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* @VIPS_DEMAND_STYLE_FATSTRIP: demand in fat (typically 10 pixel high) strips
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* @VIPS_DEMAND_STYLE_THINSTRIP: demand in thin (typically 1 pixel high) strips
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* @VIPS_DEMAND_STYLE_ANY: demand geometry does not matter
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*
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* See vips_image_pipelinev(). Operations can hint to the VIPS image IO
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* system about the kind of demand geometry they prefer.
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*
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* These demand styles are given below in order of increasing
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* restrictiveness. When demanding output from a pipeline,
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* vips_image_generate()
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* will use the most restrictive of the styles requested by the operations
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* in the pipeline.
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*
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* #VIPS_DEMAND_STYLE_THINSTRIP --- This operation would like to output strips
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* the width of the image and a few pels high. This is option suitable for
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* point-to-point operations, such as those in the arithmetic package.
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*
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* This option is only efficient for cases where each output pel depends
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* upon the pel in the corresponding position in the input image.
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*
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* #VIPS_DEMAND_STYLE_FATSTRIP --- This operation would like to output strips
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* the width of the image and as high as possible. This option is suitable
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* for area operations which do not violently transform coordinates, such
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* as vips_conv().
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*
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* #VIPS_DEMAND_STYLE_SMALLTILE --- This is the most general demand format.
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* Output is demanded in small (around 100x100 pel) sections. This style works
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* reasonably efficiently, even for bizzare operations like 45 degree rotate.
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*
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* #VIPS_DEMAND_STYLE_ANY --- This image is not being demand-read from a disc
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* file (even indirectly) so any demand style is OK. It's used for things like
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* vips_black() where the pixels are calculated.
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*
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* See also: vips_image_pipelinev().
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*/
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/**
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* VipsInterpretation:
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* @VIPS_INTERPRETATION_MULTIBAND: generic many-band image
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* @VIPS_INTERPRETATION_B_W: some kind of single-band image
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* @VIPS_INTERPRETATION_HISTOGRAM: a 1D image, eg. histogram or lookup table
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* @VIPS_INTERPRETATION_FOURIER: image is in fourier space
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* @VIPS_INTERPRETATION_XYZ: the first three bands are CIE XYZ
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* @VIPS_INTERPRETATION_LAB: pixels are in CIE Lab space
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* @VIPS_INTERPRETATION_CMYK: the first four bands are in CMYK space
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* @VIPS_INTERPRETATION_LABQ: implies #VIPS_CODING_LABQ
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* @VIPS_INTERPRETATION_RGB: generic RGB space
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* @VIPS_INTERPRETATION_CMC: a uniform colourspace based on CMC(1:1)
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* @VIPS_INTERPRETATION_LCH: pixels are in CIE LCh space
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* @VIPS_INTERPRETATION_LABS: CIE LAB coded as three signed 16-bit values
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* @VIPS_INTERPRETATION_sRGB: pixels are sRGB
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* @VIPS_INTERPRETATION_HSV: pixels are HSV
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* @VIPS_INTERPRETATION_scRGB: pixels are scRGB
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* @VIPS_INTERPRETATION_YXY: pixels are CIE Yxy
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* @VIPS_INTERPRETATION_RGB16: generic 16-bit RGB
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* @VIPS_INTERPRETATION_GREY16: generic 16-bit mono
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* @VIPS_INTERPRETATION_MATRIX: a matrix
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*
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* How the values in an image should be interpreted. For example, a
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* three-band float image of type #VIPS_INTERPRETATION_LAB should have its
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* pixels interpreted as coordinates in CIE Lab space.
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*
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* These values are set by operations as hints to user-interfaces built on top
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* of VIPS to help them show images to the user in a meaningful way.
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* Operations do not use these values to decide their action.
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*
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* The gaps in numbering are historical and must be maintained. Allocate
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* new numbers from the end.
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*/
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/**
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* VipsBandFormat:
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* @VIPS_FORMAT_NOTSET: invalid setting
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* @VIPS_FORMAT_UCHAR: unsigned char format
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* @VIPS_FORMAT_CHAR: char format
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* @VIPS_FORMAT_USHORT: unsigned short format
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* @VIPS_FORMAT_SHORT: short format
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* @VIPS_FORMAT_UINT: unsigned int format
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* @VIPS_FORMAT_INT: int format
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* @VIPS_FORMAT_FLOAT: float format
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* @VIPS_FORMAT_COMPLEX: complex (two floats) format
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* @VIPS_FORMAT_DOUBLE: double float format
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* @VIPS_FORMAT_DPCOMPLEX: double complex (two double) format
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*
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* The format used for each band element.
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*
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* Each corresponds to a native C type for the current machine. For example,
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* #VIPS_FORMAT_USHORT is <type>unsigned short</type>.
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*/
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/**
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* VipsCoding:
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* @VIPS_CODING_NONE: pixels are not coded
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* @VIPS_CODING_LABQ: pixels encode 3 float CIELAB values as 4 uchar
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* @VIPS_CODING_RAD: pixels encode 3 float RGB as 4 uchar (Radiance coding)
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*
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* How pixels are coded.
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*
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* Normally, pixels are uncoded and can be manipulated as you would expect.
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* However some file formats code pixels for compression, and sometimes it's
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* useful to be able to manipulate images in the coded format.
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*
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* The gaps in the numbering are historical and must be maintained. Allocate
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* new numbers from the end.
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*/
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/**
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* VipsProgress:
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* @run: Time we have been running
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* @eta: Estimated seconds of computation left
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* @tpels: Number of pels we expect to calculate
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* @npels: Number of pels calculated so far
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* @percent: Percent complete
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* @start: Start time
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*
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* A structure available to eval callbacks giving information on evaluation
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* progress. See #VipsImage::eval.
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*/
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/**
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* VipsImage:
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*
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* An image. These can represent an image on disc, a memory buffer, an image
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* in the process of being written to disc or a partially evaluated image
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* in memory.
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*/
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/**
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* VIPS_IMAGE_SIZEOF_ELEMENT:
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* @I: a #VipsImage
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*
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* Returns: sizeof() a band element.
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*/
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/**
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* VIPS_IMAGE_SIZEOF_PEL:
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* @I: a #VipsImage
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*
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* Returns: sizeof() a pixel.
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*/
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/**
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* VIPS_IMAGE_SIZEOF_LINE:
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* @I: a #VipsImage
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*
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* Returns: sizeof() a scanline of pixels.
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*/
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/**
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* VIPS_IMAGE_N_ELEMENTS:
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* @I: a #VipsImage
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*
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* Returns: The number of band elements in a scanline.
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*/
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/**
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* VIPS_IMAGE_N_PELS:
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* @I: a #VipsImage
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*
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* Returns: The number of pels in an image. A 64-bit unsigned int.
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*/
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/**
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* VIPS_IMAGE_ADDR:
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* @I: a #VipsImage
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* @X: x coordinate
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* @Y: y coordinate
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*
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* This macro returns a pointer to a pixel in an image, cast to a #VipsPel *.
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* It only works for
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* images which are fully available in memory, so memory buffers and small
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* mapped images only.
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*
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* If VIPS_DEBUG is defined, you get a version that checks bounds for you.
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*
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* See also: vips_image_wio_input(), vips_image_inplace(), VIPS_REGION_ADDR().
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*
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* Returns: The address of pixel (@X,@Y) in @I.
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*/
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/**
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* VIPS_MATRIX:
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* @I: a #VipsImage
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* @X: x coordinate
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* @Y: y coordinate
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*
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* This macro returns a pointer to a pixel in an image, cast to a double*. The
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* image must have a single band, be #VIPS_FORMAT_DOUBLE and be
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* fully available in memory, so memory buffers and small
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* mapped images only.
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*
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* If VIPS_DEBUG is defined, you get a version that checks bounds and image
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* type for you.
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*
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* See also: vips_image_wio_input(), vips_image_inplace(), vips_check_matrix().
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*
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* Returns: The address of pixel (@X,@Y) in @I.
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*/
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/* Our signals.
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*/
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enum {
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SIG_PREEVAL,
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SIG_EVAL,
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SIG_POSTEVAL,
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SIG_WRITTEN,
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SIG_INVALIDATE,
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SIG_MINIMISE,
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SIG_LAST
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};
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/* Progress feedback. Only really useful for testing, tbh.
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*/
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int vips__progress = 0;
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/* A string giving the image size (in bytes of uncompressed image) above which
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* we decompress to disc on open. Can be eg. "12m" for 12 megabytes.
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*/
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char *vips__disc_threshold = NULL;
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static guint vips_image_signals[SIG_LAST] = { 0 };
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G_DEFINE_TYPE( VipsImage, vips_image, VIPS_TYPE_OBJECT );
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/**
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* vips_progress_set:
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* @progress: %TRUE to enable progress messages
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*
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* If set, vips will print messages about the progress of computation to
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* stdout. This can also be enabled with the --vips-progress option, or by
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* setting the environment variable VIPS_PROGRESS.
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*/
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void
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vips_progress_set( gboolean progress )
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{
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vips__progress = progress;
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}
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static void
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vips_image_delete( VipsImage *image )
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{
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if( image->delete_on_close ) {
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g_assert( image->delete_on_close_filename );
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VIPS_DEBUG_MSG( "vips_image_delete: removing temp %s\n",
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image->delete_on_close_filename );
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g_unlink( image->delete_on_close_filename );
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VIPS_FREE( image->delete_on_close_filename );
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image->delete_on_close = FALSE;
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}
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}
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static void
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vips_image_finalize( GObject *gobject )
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{
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VipsImage *image = VIPS_IMAGE( gobject );
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VIPS_DEBUG_MSG( "vips_image_finalize: %p\n", gobject );
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/* Should be no regions defined on the image, since they all hold a
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* ref to their host image.
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*/
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g_assert( !image->regions );
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/* Therefore there should be no windows.
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*/
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g_assert( !image->windows );
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/* Junk generate functions.
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*/
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image->start_fn = NULL;
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image->generate_fn = NULL;
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image->stop_fn = NULL;
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image->client1 = NULL;
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image->client2 = NULL;
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/* No more upstream/downstream links.
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*/
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vips__link_break_all( image );
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if( image->time ) {
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VIPS_FREEF( g_timer_destroy, image->time->start );
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VIPS_FREE( image->time );
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}
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/* Any image data?
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*/
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if( image->data ) {
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/* Buffer image. Only free stuff we know we allocated.
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*/
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if( image->dtype == VIPS_IMAGE_SETBUF ) {
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VIPS_DEBUG_MSG( "vips_image_finalize: "
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"freeing buffer\n" );
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vips_tracked_free( image->data );
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image->dtype = VIPS_IMAGE_NONE;
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}
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image->data = NULL;
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}
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/* If this is a temp, delete it.
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*/
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vips_image_delete( image );
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VIPS_FREEF( vips_g_mutex_free, image->sslock );
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VIPS_FREE( image->Hist );
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VIPS_FREEF( vips__gslist_gvalue_free, image->history_list );
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vips__meta_destroy( image );
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G_OBJECT_CLASS( vips_image_parent_class )->finalize( gobject );
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}
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static void
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vips_image_dispose( GObject *gobject )
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{
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VipsImage *image = VIPS_IMAGE( gobject );
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VIPS_DEBUG_MSG( "vips_image_dispose: %p\n", gobject );
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#ifdef DEBUG_LEAK
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{
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VipsImagePixels *pixels = g_object_get_qdata( G_OBJECT( image ),
|
|
vips__image_pixels_quark );
|
|
|
|
if( pixels &&
|
|
pixels->tpels ) {
|
|
int compute_percent = 100.0 * pixels->npels / pixels->tpels;
|
|
|
|
if( compute_percent > 100 )
|
|
printf( "vips_image_dispose: %s %s computed %d%%\n",
|
|
image->filename,
|
|
pixels->nickname,
|
|
compute_percent );
|
|
}
|
|
}
|
|
#endif /*DEBUG_LEAK*/
|
|
|
|
vips_object_preclose( VIPS_OBJECT( gobject ) );
|
|
|
|
/* We have to junk the fd in dispose, since we run this for rewind and
|
|
* we must close and reopen the file when we switch from write to
|
|
* read.
|
|
*/
|
|
|
|
/* Any file mapping?
|
|
*/
|
|
if( image->baseaddr ) {
|
|
/* MMAP file.
|
|
*/
|
|
VIPS_DEBUG_MSG( "vips_image_dispose: unmapping file\n" );
|
|
|
|
vips__munmap( image->baseaddr, image->length );
|
|
image->baseaddr = NULL;
|
|
image->length = 0;
|
|
|
|
/* This must have been a pointer to the mmap region, rather
|
|
* than a setbuf.
|
|
*/
|
|
image->data = NULL;
|
|
}
|
|
|
|
/* Is there a file descriptor?
|
|
*/
|
|
if( image->fd != -1 ) {
|
|
VIPS_DEBUG_MSG( "vips_image_dispose: closing output file\n" );
|
|
|
|
if( vips_tracked_close( image->fd ) == -1 )
|
|
vips_error( "VipsImage",
|
|
"%s", _( "unable to close fd" ) );
|
|
image->fd = -1;
|
|
}
|
|
|
|
G_OBJECT_CLASS( vips_image_parent_class )->dispose( gobject );
|
|
}
|
|
|
|
static VipsObject *
|
|
vips_image_new_from_file_object( const char *string )
|
|
{
|
|
VipsImage *image;
|
|
|
|
vips_check_init();
|
|
|
|
/* We mustn't _build() the object here, so we can't just call
|
|
* vips_image_new_from_file().
|
|
*/
|
|
image = VIPS_IMAGE( g_object_new( VIPS_TYPE_IMAGE, NULL ) );
|
|
g_object_set( image,
|
|
"filename", string,
|
|
"mode", "r",
|
|
NULL );
|
|
|
|
return( VIPS_OBJECT( image ) );
|
|
}
|
|
|
|
static void
|
|
vips_image_to_string( VipsObject *object, VipsBuf *buf )
|
|
{
|
|
VipsImage *image = VIPS_IMAGE( object );
|
|
|
|
vips_buf_appends( buf, image->filename );
|
|
}
|
|
|
|
static int
|
|
vips_image_write_object( VipsObject *object, const char *string )
|
|
{
|
|
return( vips_image_write_to_file( VIPS_IMAGE( object ), string,
|
|
NULL ) );
|
|
}
|
|
|
|
static void *
|
|
print_field_fn( VipsImage *image, const char *field, GValue *value, void *a )
|
|
{
|
|
VipsBuf *buf = (VipsBuf *) a;
|
|
|
|
const char *extra;
|
|
char *str_value;
|
|
|
|
/* Look for known enums and decode them.
|
|
*/
|
|
extra = NULL;
|
|
if( strcmp( field, "coding" ) == 0 )
|
|
extra = vips_enum_nick(
|
|
VIPS_TYPE_CODING, g_value_get_int( value ) );
|
|
else if( strcmp( field, "format" ) == 0 )
|
|
extra = vips_enum_nick(
|
|
VIPS_TYPE_BAND_FORMAT, g_value_get_int( value ) );
|
|
else if( strcmp( field, "interpretation" ) == 0 )
|
|
extra = vips_enum_nick(
|
|
VIPS_TYPE_INTERPRETATION, g_value_get_int( value ) );
|
|
|
|
str_value = g_strdup_value_contents( value );
|
|
vips_buf_appendf( buf, "%s: %s", field, str_value );
|
|
g_free( str_value );
|
|
|
|
if( extra )
|
|
vips_buf_appendf( buf, " - %s", extra );
|
|
|
|
vips_buf_appendf( buf, "\n" );
|
|
|
|
return( NULL );
|
|
}
|
|
|
|
static void
|
|
vips_image_dump( VipsObject *object, VipsBuf *buf )
|
|
{
|
|
VipsImage *image = VIPS_IMAGE( object );
|
|
|
|
vips_buf_appendf( buf,
|
|
ngettext(
|
|
"%dx%d %s, %d band, %s",
|
|
"%dx%d %s, %d bands, %s",
|
|
vips_image_get_bands( image ) ),
|
|
vips_image_get_width( image ),
|
|
vips_image_get_height( image ),
|
|
vips_enum_nick( VIPS_TYPE_BAND_FORMAT,
|
|
vips_image_get_format( image ) ),
|
|
vips_image_get_bands( image ),
|
|
vips_enum_nick( VIPS_TYPE_INTERPRETATION,
|
|
vips_image_get_interpretation( image ) ) );
|
|
|
|
vips_buf_appendf( buf, ", %s",
|
|
vips_enum_nick( VIPS_TYPE_IMAGE_TYPE, image->dtype ) );
|
|
|
|
VIPS_OBJECT_CLASS( vips_image_parent_class )->dump( object, buf );
|
|
|
|
vips_buf_appendf( buf, "\n" );
|
|
|
|
(void) vips_image_map( image, print_field_fn, (void *) buf );
|
|
|
|
vips_buf_appendf( buf, "Hist: %s", vips_image_get_history( image ) );
|
|
}
|
|
|
|
static void
|
|
vips_image_summary( VipsObject *object, VipsBuf *buf )
|
|
{
|
|
VipsImage *image = VIPS_IMAGE( object );
|
|
const char *p;
|
|
|
|
vips_buf_appendf( buf, "%dx%d",
|
|
vips_image_get_width( image ), vips_image_get_height( image ) );
|
|
if( vips_image_get_coding( image ) == VIPS_CODING_NONE ) {
|
|
vips_buf_appendf( buf,
|
|
ngettext(
|
|
" %s, %d band, %s",
|
|
" %s, %d bands, %s",
|
|
vips_image_get_bands( image ) ),
|
|
vips_enum_nick( VIPS_TYPE_BAND_FORMAT,
|
|
vips_image_get_format( image ) ),
|
|
vips_image_get_bands( image ),
|
|
vips_enum_nick( VIPS_TYPE_INTERPRETATION,
|
|
vips_image_get_interpretation( image ) ) );
|
|
}
|
|
else {
|
|
vips_buf_appendf( buf, ", %s",
|
|
vips_enum_nick( VIPS_TYPE_CODING,
|
|
vips_image_get_coding( image ) ) );
|
|
}
|
|
|
|
if( vips_image_get_typeof( image, VIPS_META_LOADER ) &&
|
|
!vips_image_get_string( image, VIPS_META_LOADER, &p ) )
|
|
vips_buf_appendf( buf, ", %s", p );
|
|
|
|
VIPS_OBJECT_CLASS( vips_image_parent_class )->summary( object, buf );
|
|
}
|
|
|
|
static void *
|
|
vips_image_sanity_upstream( VipsImage *up, VipsImage *down )
|
|
{
|
|
if( !g_slist_find( up->downstream, down ) ||
|
|
!g_slist_find( down->upstream, up ) )
|
|
return( up );
|
|
|
|
return( NULL );
|
|
}
|
|
|
|
static void *
|
|
vips_image_sanity_downstream( VipsImage *down, VipsImage *up )
|
|
{
|
|
return( vips_image_sanity_upstream( up, down ) );
|
|
}
|
|
|
|
static void
|
|
vips_image_sanity( VipsObject *object, VipsBuf *buf )
|
|
{
|
|
VipsImage *image = VIPS_IMAGE( object );
|
|
|
|
if( !image->filename )
|
|
vips_buf_appends( buf, "NULL filename\n" );
|
|
|
|
/* All 0 means im has been inited but never used.
|
|
*/
|
|
if( image->Xsize != 0 ||
|
|
image->Ysize != 0 ||
|
|
image->Bands != 0 ) {
|
|
if( image->Xsize <= 0 ||
|
|
image->Ysize <= 0 ||
|
|
image->Bands <= 0 )
|
|
vips_buf_appends( buf, "bad dimensions\n" );
|
|
if( image->BandFmt < -1 ||
|
|
image->BandFmt > VIPS_FORMAT_DPCOMPLEX ||
|
|
(image->Coding != -1 &&
|
|
image->Coding != VIPS_CODING_NONE &&
|
|
image->Coding != VIPS_CODING_LABQ &&
|
|
image->Coding != VIPS_CODING_RAD) ||
|
|
image->Type >= VIPS_INTERPRETATION_LAST ||
|
|
image->dtype > VIPS_IMAGE_PARTIAL ||
|
|
image->dhint > VIPS_DEMAND_STYLE_ANY )
|
|
vips_buf_appends( buf, "bad enum\n" );
|
|
if( image->Xres < 0 ||
|
|
image->Yres < 0 )
|
|
vips_buf_appends( buf, "bad resolution\n" );
|
|
}
|
|
|
|
/* Must lock around inter-image links.
|
|
*/
|
|
g_mutex_lock( vips__global_lock );
|
|
|
|
if( vips_slist_map2( image->upstream,
|
|
(VipsSListMap2Fn) vips_image_sanity_upstream, image, NULL ) )
|
|
vips_buf_appends( buf, "upstream broken\n" );
|
|
if( vips_slist_map2( image->downstream,
|
|
(VipsSListMap2Fn) vips_image_sanity_downstream, image, NULL ) )
|
|
vips_buf_appends( buf, "downstream broken\n" );
|
|
|
|
g_mutex_unlock( vips__global_lock );
|
|
|
|
VIPS_OBJECT_CLASS( vips_image_parent_class )->sanity( object, buf );
|
|
}
|
|
|
|
static void
|
|
vips_image_rewind( VipsObject *object )
|
|
{
|
|
VipsImage *image = VIPS_IMAGE( object );
|
|
char *filename;
|
|
char *mode;
|
|
|
|
/* This triggers a dispose. Copy filename/mode across the dispose.
|
|
*/
|
|
filename = g_strdup( vips_image_get_filename( image ) );
|
|
mode = g_strdup( vips_image_get_mode( image ) );
|
|
|
|
VIPS_OBJECT_CLASS( vips_image_parent_class )->rewind( object );
|
|
|
|
g_assert( image->filename == NULL );
|
|
g_assert( image->mode == NULL );
|
|
|
|
image->filename = filename;
|
|
image->mode = mode;
|
|
}
|
|
|
|
/* Delayed save.
|
|
*/
|
|
|
|
/* From "written" callback: save to image->filename using VipsForeign.
|
|
*/
|
|
static void
|
|
vips_image_save_cb( VipsImage *image, int *result )
|
|
{
|
|
if( vips_foreign_save( image, image->filename, NULL ) )
|
|
*result = -1;
|
|
}
|
|
|
|
/* Progress feedback.
|
|
*/
|
|
|
|
static void
|
|
vips_image_preeval_cb( VipsImage *image, VipsProgress *progress, int *last )
|
|
{
|
|
int tile_width;
|
|
int tile_height;
|
|
int nlines;
|
|
|
|
*last = -1;
|
|
|
|
vips_get_tile_size( image,
|
|
&tile_width, &tile_height, &nlines );
|
|
printf( _( "%s %s: %d x %d pixels, %d threads, %d x %d tiles, "
|
|
"%d lines in buffer" ),
|
|
g_get_prgname(), image->filename,
|
|
image->Xsize, image->Ysize,
|
|
vips_concurrency_get(),
|
|
tile_width, tile_height, nlines );
|
|
printf( "\n" );
|
|
}
|
|
|
|
static void
|
|
vips_image_eval_cb( VipsImage *image, VipsProgress *progress, int *last )
|
|
{
|
|
if( progress->percent != *last ) {
|
|
printf( _( "%s %s: %d%% complete" ),
|
|
g_get_prgname(), image->filename,
|
|
progress->percent );
|
|
printf( "\r" );
|
|
fflush( stdout );
|
|
|
|
*last = progress->percent;
|
|
|
|
/* Needs DEBUG in region.c
|
|
vips_region_dump_all();
|
|
*/
|
|
}
|
|
}
|
|
|
|
static void
|
|
vips_image_posteval_cb( VipsImage *image, VipsProgress *progress )
|
|
{
|
|
/* Spaces at end help to erase the %complete message we overwrite.
|
|
*/
|
|
printf( _( "%s %s: done in %.3gs \n" ),
|
|
g_get_prgname(), image->filename,
|
|
g_timer_elapsed( progress->start, NULL ) );
|
|
}
|
|
|
|
/* Attach progress feedback, if required.
|
|
*/
|
|
static void
|
|
vips_image_add_progress( VipsImage *image )
|
|
{
|
|
if( vips__progress ||
|
|
g_getenv( "VIPS_PROGRESS" ) ||
|
|
g_getenv( "IM_PROGRESS" ) ) {
|
|
|
|
/* Keep the %complete we displayed last time here.
|
|
*/
|
|
int *last = VIPS_NEW( image, int );
|
|
|
|
g_signal_connect( image, "preeval",
|
|
G_CALLBACK( vips_image_preeval_cb ), last );
|
|
g_signal_connect( image, "eval",
|
|
G_CALLBACK( vips_image_eval_cb ), last );
|
|
g_signal_connect( image, "posteval",
|
|
G_CALLBACK( vips_image_posteval_cb ), NULL );
|
|
|
|
vips_image_set_progress( image, TRUE );
|
|
}
|
|
}
|
|
|
|
/* We have to do a lot of work in _build() so we can work with the stuff in
|
|
* /deprecated to support the vips7 API. We could get rid of most of this
|
|
* stuff if we were vips8-only.
|
|
*/
|
|
|
|
static int
|
|
vips_image_build( VipsObject *object )
|
|
{
|
|
VipsImage *image = VIPS_IMAGE( object );
|
|
const char *filename = image->filename;
|
|
const char *mode = image->mode;
|
|
|
|
guint32 magic;
|
|
guint64 sizeof_image;
|
|
|
|
VIPS_DEBUG_MSG( "vips_image_build: %p\n", image );
|
|
|
|
if( VIPS_OBJECT_CLASS( vips_image_parent_class )->build( object ) )
|
|
return( -1 );
|
|
|
|
/* Parse the mode string.
|
|
*/
|
|
switch( mode[0] ) {
|
|
case 'v':
|
|
/* Used by 'r' for native open of vips, see below. Also by
|
|
* vips_image_rewind_output().
|
|
*/
|
|
if( vips_image_open_input( image ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
case 'r':
|
|
if( (magic = vips__file_magic( filename )) ) {
|
|
/* We may need to byteswap.
|
|
*/
|
|
guint32 us = vips_amiMSBfirst() ?
|
|
VIPS_MAGIC_INTEL : VIPS_MAGIC_SPARC;
|
|
|
|
if( magic == us ) {
|
|
/* Native open.
|
|
*/
|
|
if( vips_image_open_input( image ) )
|
|
return( -1 );
|
|
}
|
|
else {
|
|
VipsImage *t;
|
|
VipsImage *t2;
|
|
|
|
/* Open the image in t, then byteswap to this
|
|
* image.
|
|
*/
|
|
if( !(t = vips_image_new_mode( filename,
|
|
"v" )) )
|
|
return( -1 );
|
|
|
|
if( vips_byteswap( t, &t2, NULL ) ) {
|
|
g_object_unref( t );
|
|
return( -1 );
|
|
}
|
|
g_object_unref( t );
|
|
|
|
image->dtype = VIPS_IMAGE_PARTIAL;
|
|
if( vips_image_write( t2, image ) ) {
|
|
g_object_unref( t2 );
|
|
return( -1 );
|
|
}
|
|
g_object_unref( t2 );
|
|
}
|
|
}
|
|
else {
|
|
VipsImage *t;
|
|
|
|
if( mode[1] == 's' ) {
|
|
if( vips_foreign_load( filename, &t,
|
|
"access", VIPS_ACCESS_SEQUENTIAL,
|
|
NULL ) )
|
|
return( -1 );
|
|
}
|
|
else {
|
|
if( vips_foreign_load( filename, &t, NULL ) )
|
|
return( -1 );
|
|
}
|
|
|
|
image->dtype = VIPS_IMAGE_PARTIAL;
|
|
if( vips_image_write( t, image ) ) {
|
|
g_object_unref( t );
|
|
return( -1 );
|
|
}
|
|
g_object_unref( t );
|
|
}
|
|
|
|
break;
|
|
|
|
case 'w':
|
|
{
|
|
const char *file_op;
|
|
|
|
/* Make sure the vips saver is there ... strange things will
|
|
* happen if this type is renamed or removed.
|
|
*/
|
|
g_assert( g_type_from_name( "VipsForeignSaveVips" ) );
|
|
|
|
if( !(file_op = vips_foreign_find_save( filename )) )
|
|
return( -1 );
|
|
|
|
/* If this is the vips saver, just save directly ourselves.
|
|
* Otherwise save with VipsForeign when the image has been
|
|
* written to.
|
|
*/
|
|
if( strcmp( file_op, "VipsForeignSaveVips" ) == 0 )
|
|
image->dtype = VIPS_IMAGE_OPENOUT;
|
|
else {
|
|
image->dtype = VIPS_IMAGE_PARTIAL;
|
|
g_signal_connect( image, "written",
|
|
G_CALLBACK( vips_image_save_cb ),
|
|
NULL );
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 't':
|
|
image->dtype = VIPS_IMAGE_SETBUF;
|
|
image->dhint = VIPS_DEMAND_STYLE_ANY;
|
|
break;
|
|
|
|
case 'p':
|
|
image->dtype = VIPS_IMAGE_PARTIAL;
|
|
break;
|
|
|
|
case 'a':
|
|
if( (image->fd = vips__open_image_read( filename )) == -1 )
|
|
return( -1 );
|
|
image->dtype = VIPS_IMAGE_OPENIN;
|
|
image->dhint = VIPS_DEMAND_STYLE_THINSTRIP;
|
|
|
|
if( image->Bands == 1 )
|
|
image->Type = VIPS_INTERPRETATION_B_W;
|
|
else if( image->Bands == 3 )
|
|
image->Type = VIPS_INTERPRETATION_RGB;
|
|
else
|
|
image->Type = VIPS_INTERPRETATION_MULTIBAND;
|
|
|
|
/* Read the real file length and check against what we think
|
|
* the size should be.
|
|
*/
|
|
if( (image->file_length = vips_file_length( image->fd )) == -1 )
|
|
return( -1 );
|
|
|
|
/* Very common, so a special message.
|
|
*/
|
|
sizeof_image = VIPS_IMAGE_SIZEOF_IMAGE( image ) +
|
|
image->sizeof_header;
|
|
if( image->file_length < sizeof_image ) {
|
|
vips_error( "VipsImage",
|
|
_( "unable to open \"%s\", file too short" ),
|
|
image->filename );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Just weird. Only print a warning for this, since we should
|
|
* still be able to process it without coredumps.
|
|
*/
|
|
if( image->file_length > sizeof_image )
|
|
g_warning( _( "%s is longer than expected" ),
|
|
image->filename );
|
|
break;
|
|
|
|
case 'm':
|
|
if( image->Bands == 1 )
|
|
image->Type = VIPS_INTERPRETATION_B_W;
|
|
else if( image->Bands == 3 )
|
|
image->Type = VIPS_INTERPRETATION_RGB;
|
|
else
|
|
image->Type = VIPS_INTERPRETATION_MULTIBAND;
|
|
|
|
image->dtype = VIPS_IMAGE_SETBUF_FOREIGN;
|
|
image->dhint = VIPS_DEMAND_STYLE_ANY;
|
|
|
|
break;
|
|
|
|
default:
|
|
vips_error( "VipsImage", _( "bad mode \"%s\"" ), mode );
|
|
|
|
return( -1 );
|
|
}
|
|
|
|
vips_image_add_progress( image );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
static void *
|
|
vips_image_real_invalidate_cb( VipsRegion *reg )
|
|
{
|
|
vips_region_invalidate( reg );
|
|
|
|
return( NULL );
|
|
}
|
|
|
|
static void
|
|
vips_image_real_invalidate( VipsImage *image )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_real_invalidate: %p\n", image );
|
|
|
|
VIPS_GATE_START( "vips_image_real_invalidate: wait" );
|
|
|
|
g_mutex_lock( image->sslock );
|
|
|
|
VIPS_GATE_STOP( "vips_image_real_invalidate: wait" );
|
|
|
|
(void) vips_slist_map2( image->regions,
|
|
(VipsSListMap2Fn) vips_image_real_invalidate_cb, NULL, NULL );
|
|
|
|
g_mutex_unlock( image->sslock );
|
|
}
|
|
|
|
static void
|
|
vips_image_real_minimise( VipsImage *image )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_real_minimise: %p\n", image );
|
|
}
|
|
|
|
static void
|
|
vips_image_real_written( VipsImage *image, int *result )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_real_written: %p\n", image );
|
|
|
|
/* For vips image write, append the xml after the data.
|
|
*/
|
|
if( image->dtype == VIPS_IMAGE_OPENOUT &&
|
|
vips__writehist( image ) )
|
|
*result = -1;
|
|
}
|
|
|
|
static void
|
|
vips_image_class_init( VipsImageClass *class )
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
|
|
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
|
|
|
|
VIPS_DEBUG_MSG( "vips_image_class_init:\n" );
|
|
|
|
/* We must have threads set up before we can process.
|
|
*/
|
|
vips_check_init();
|
|
|
|
gobject_class->finalize = vips_image_finalize;
|
|
gobject_class->dispose = vips_image_dispose;
|
|
gobject_class->set_property = vips_object_set_property;
|
|
gobject_class->get_property = vips_object_get_property;
|
|
|
|
vobject_class->new_from_string = vips_image_new_from_file_object;
|
|
vobject_class->to_string = vips_image_to_string;
|
|
vobject_class->output_needs_arg = TRUE;
|
|
vobject_class->output_to_arg = vips_image_write_object;
|
|
|
|
vobject_class->nickname = "image";
|
|
vobject_class->description = _( "image class" );
|
|
|
|
vobject_class->dump = vips_image_dump;
|
|
vobject_class->summary = vips_image_summary;
|
|
vobject_class->sanity = vips_image_sanity;
|
|
vobject_class->rewind = vips_image_rewind;
|
|
vobject_class->build = vips_image_build;
|
|
|
|
class->invalidate = vips_image_real_invalidate;
|
|
class->written = vips_image_real_written;
|
|
class->minimise = vips_image_real_minimise;
|
|
|
|
/* Create properties.
|
|
*/
|
|
|
|
/* It'd be good to have these as set once at construct time, but we
|
|
* can't :-(
|
|
*
|
|
* For example, a "p" image might be made with vips_image_new() and
|
|
* constructed, then passed to vips_copy() of whatever to be written to.
|
|
* That operation will then need to set width/height etc.
|
|
*
|
|
* We can't set_once either, since vips_copy() etc. need to update
|
|
* xoffset and friends on the way through.
|
|
*/
|
|
|
|
VIPS_ARG_INT( class, "width", 2,
|
|
_( "Width" ),
|
|
_( "Image width in pixels" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Xsize ),
|
|
1, VIPS_MAX_COORD, 1 );
|
|
|
|
VIPS_ARG_INT( class, "height", 3,
|
|
_( "Height" ),
|
|
_( "Image height in pixels" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Ysize ),
|
|
1, VIPS_MAX_COORD, 1 );
|
|
|
|
VIPS_ARG_INT( class, "bands", 4,
|
|
_( "Bands" ),
|
|
_( "Number of bands in image" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Bands ),
|
|
1, VIPS_MAX_COORD, 1 );
|
|
|
|
VIPS_ARG_ENUM( class, "format", 5,
|
|
_( "Format" ),
|
|
_( "Pixel format in image" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, BandFmt ),
|
|
VIPS_TYPE_BAND_FORMAT, VIPS_FORMAT_UCHAR );
|
|
|
|
VIPS_ARG_ENUM( class, "coding", 6,
|
|
_( "Coding" ),
|
|
_( "Pixel coding" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Coding ),
|
|
VIPS_TYPE_CODING, VIPS_CODING_NONE );
|
|
|
|
VIPS_ARG_ENUM( class, "interpretation", 7,
|
|
_( "Interpretation" ),
|
|
_( "Pixel interpretation" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Type ),
|
|
VIPS_TYPE_INTERPRETATION, VIPS_INTERPRETATION_MULTIBAND );
|
|
|
|
VIPS_ARG_DOUBLE( class, "xres", 8,
|
|
_( "Xres" ),
|
|
_( "Horizontal resolution in pixels/mm" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Xres ),
|
|
-0.0, 1000000, 0 );
|
|
|
|
VIPS_ARG_DOUBLE( class, "yres", 9,
|
|
_( "Yres" ),
|
|
_( "Vertical resolution in pixels/mm" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Yres ),
|
|
-0.0, 1000000, 0 );
|
|
|
|
VIPS_ARG_INT( class, "xoffset", 10,
|
|
_( "Xoffset" ),
|
|
_( "Horizontal offset of origin" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Xoffset ),
|
|
-VIPS_MAX_COORD, VIPS_MAX_COORD, 0 );
|
|
|
|
VIPS_ARG_INT( class, "yoffset", 11,
|
|
_( "Yoffset" ),
|
|
_( "Vertical offset of origin" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, Yoffset ),
|
|
-VIPS_MAX_COORD, VIPS_MAX_COORD, 0 );
|
|
|
|
VIPS_ARG_STRING( class, "filename", 12,
|
|
_( "Filename" ),
|
|
_( "Image filename" ),
|
|
VIPS_ARGUMENT_SET_ONCE | VIPS_ARGUMENT_CONSTRUCT,
|
|
G_STRUCT_OFFSET( VipsImage, filename ),
|
|
NULL );
|
|
|
|
VIPS_ARG_STRING( class, "mode", 13,
|
|
_( "Mode" ),
|
|
_( "Open mode" ),
|
|
VIPS_ARGUMENT_SET_ONCE | VIPS_ARGUMENT_CONSTRUCT,
|
|
G_STRUCT_OFFSET( VipsImage, mode ),
|
|
"p" );
|
|
|
|
VIPS_ARG_BOOL( class, "kill", 14,
|
|
_( "Kill" ),
|
|
_( "Block evaluation on this image" ),
|
|
VIPS_ARGUMENT_SET_ALWAYS,
|
|
G_STRUCT_OFFSET( VipsImage, kill ),
|
|
FALSE );
|
|
|
|
VIPS_ARG_ENUM( class, "demand", 15,
|
|
_( "Demand style" ),
|
|
_( "Preferred demand style for this image" ),
|
|
VIPS_ARGUMENT_CONSTRUCT,
|
|
G_STRUCT_OFFSET( VipsImage, dhint ),
|
|
VIPS_TYPE_DEMAND_STYLE, VIPS_DEMAND_STYLE_SMALLTILE );
|
|
|
|
VIPS_ARG_UINT64( class, "sizeof_header", 16,
|
|
_( "Size of header" ),
|
|
_( "Offset in bytes from start of file" ),
|
|
VIPS_ARGUMENT_SET_ONCE | VIPS_ARGUMENT_CONSTRUCT,
|
|
G_STRUCT_OFFSET( VipsImage, sizeof_header ),
|
|
0, 1000000000, VIPS_SIZEOF_HEADER );
|
|
|
|
VIPS_ARG_POINTER( class, "foreign_buffer", 17,
|
|
_( "Foreign buffer" ),
|
|
_( "Pointer to foreign pixels" ),
|
|
VIPS_ARGUMENT_SET_ONCE | VIPS_ARGUMENT_CONSTRUCT,
|
|
G_STRUCT_OFFSET( VipsImage, data ) );
|
|
|
|
/* Create signals.
|
|
*/
|
|
|
|
/**
|
|
* VipsImage::preeval:
|
|
* @image: the image to be calculated
|
|
* @progress: #VipsProgress for this image
|
|
*
|
|
* The ::preeval signal is emitted once before computation of @image
|
|
* starts. It's a good place to set up evaluation feedback.
|
|
*
|
|
* Use vips_image_set_progress() to turn on progress reporting for an
|
|
* image.
|
|
*/
|
|
vips_image_signals[SIG_PREEVAL] = g_signal_new( "preeval",
|
|
G_TYPE_FROM_CLASS( class ),
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET( VipsImageClass, preeval ),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__POINTER,
|
|
G_TYPE_NONE, 1,
|
|
G_TYPE_POINTER );
|
|
|
|
/**
|
|
* VipsImage::eval:
|
|
* @image: the image being calculated
|
|
* @progress: #VipsProgress for this image
|
|
*
|
|
* The ::eval signal is emitted once per work unit (typically a 128 x
|
|
* 128 area of pixels) during image computation.
|
|
*
|
|
* You can use this signal to update user-interfaces with progress
|
|
* feedback. Beware of updating too frequently: you will usually
|
|
* need some throttling mechanism.
|
|
*
|
|
* Use vips_image_set_progress() to turn on progress reporting for an
|
|
* image.
|
|
*/
|
|
vips_image_signals[SIG_EVAL] = g_signal_new( "eval",
|
|
G_TYPE_FROM_CLASS( class ),
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET( VipsImageClass, eval ),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__POINTER,
|
|
G_TYPE_NONE, 1,
|
|
G_TYPE_POINTER );
|
|
|
|
/**
|
|
* VipsImage::posteval:
|
|
* @image: the image that was calculated
|
|
* @progress: #VipsProgress for this image
|
|
*
|
|
* The ::posteval signal is emitted once at the end of the computation
|
|
* of @image. It's a good place to shut down evaluation feedback.
|
|
*
|
|
* Use vips_image_set_progress() to turn on progress reporting for an
|
|
* image.
|
|
*/
|
|
vips_image_signals[SIG_POSTEVAL] = g_signal_new( "posteval",
|
|
G_TYPE_FROM_CLASS( class ),
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET( VipsImageClass, posteval ),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__POINTER,
|
|
G_TYPE_NONE, 1,
|
|
G_TYPE_POINTER );
|
|
|
|
/**
|
|
* VipsImage::written:
|
|
* @image: the image that was calculated
|
|
* @result: set to non-zero to indicate error
|
|
*
|
|
* The ::written signal is emitted just after an image has been
|
|
* written to. It is
|
|
* used by vips to implement things like write to foreign file
|
|
* formats.
|
|
*/
|
|
vips_image_signals[SIG_WRITTEN] = g_signal_new( "written",
|
|
G_TYPE_FROM_CLASS( class ),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET( VipsImageClass, written ),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__POINTER,
|
|
G_TYPE_NONE, 1,
|
|
G_TYPE_POINTER );
|
|
|
|
/**
|
|
* VipsImage::invalidate:
|
|
* @image: the image that has changed
|
|
*
|
|
* The ::invalidate signal is emitted when an image or one of it's
|
|
* upstream data sources has been destructively modified. See
|
|
* vips_image_invalidate_all().
|
|
*/
|
|
vips_image_signals[SIG_INVALIDATE] = g_signal_new( "invalidate",
|
|
G_TYPE_FROM_CLASS( class ),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET( VipsImageClass, invalidate ),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__VOID,
|
|
G_TYPE_NONE, 0 );
|
|
|
|
/**
|
|
* VipsImage::minimise:
|
|
* @image: the image that is being minimised
|
|
*
|
|
* The ::minimise signal is emitted when an image has been asked to
|
|
* minimise memory usage. All non-essential caches are dropped.
|
|
* See
|
|
* vips_image_minimise_all().
|
|
*/
|
|
vips_image_signals[SIG_MINIMISE] = g_signal_new( "minimise",
|
|
G_TYPE_FROM_CLASS( class ),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET( VipsImageClass, minimise ),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__VOID,
|
|
G_TYPE_NONE, 0 );
|
|
|
|
}
|
|
|
|
static void
|
|
vips_image_init( VipsImage *image )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_init: %p\n", image );
|
|
|
|
/* Default to native order.
|
|
*/
|
|
image->magic = vips_amiMSBfirst() ? VIPS_MAGIC_SPARC : VIPS_MAGIC_INTEL;
|
|
|
|
image->Xsize = 1;
|
|
image->Ysize = 1;
|
|
image->Bands = 1;
|
|
|
|
image->Xres = 1.0;
|
|
image->Yres = 1.0;
|
|
|
|
image->fd = -1; /* since 0 is stdout */
|
|
image->sslock = vips_g_mutex_new();
|
|
|
|
image->sizeof_header = VIPS_SIZEOF_HEADER;
|
|
|
|
image->mode = g_strdup( "p" );
|
|
|
|
#ifdef DEBUG_LEAK
|
|
g_object_set_qdata_full( G_OBJECT( image ), vips__image_pixels_quark,
|
|
g_new0( VipsImagePixels, 1 ), (GDestroyNotify) g_free );
|
|
#endif /*DEBUG_LEAK*/
|
|
}
|
|
|
|
int
|
|
vips_image_written( VipsImage *image )
|
|
{
|
|
int result;
|
|
|
|
VIPS_DEBUG_MSG( "vips_image_written: %p\n", image );
|
|
|
|
result = 0;
|
|
g_signal_emit( image, vips_image_signals[SIG_WRITTEN], 0, &result );
|
|
|
|
return( result );
|
|
}
|
|
|
|
void
|
|
vips_image_invalidate( VipsImage *image )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_invalidate: %p\n", image );
|
|
|
|
g_signal_emit( image, vips_image_signals[SIG_INVALIDATE], 0 );
|
|
}
|
|
|
|
static void *
|
|
vips_image_invalidate_all_cb( VipsImage *image )
|
|
{
|
|
vips_image_invalidate( image );
|
|
|
|
return( NULL );
|
|
}
|
|
|
|
/**
|
|
* vips_image_invalidate_all:
|
|
* @image: #VipsImage to invalidate
|
|
*
|
|
* Invalidate all pixel caches on @image and any downstream images, that
|
|
* is, images which depend on this image. Additionally, all operations which
|
|
* depend upon this image are dropped from the VIPS operation cache.
|
|
*
|
|
* You should call this function after
|
|
* destructively modifying an image with something like vips_draw_circle().
|
|
*
|
|
* The #VipsImage::invalidate signal is emitted for all invalidated images.
|
|
*
|
|
* See also: vips_region_invalidate().
|
|
*/
|
|
void
|
|
vips_image_invalidate_all( VipsImage *image )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_invalidate_all: %p\n", image );
|
|
|
|
(void) vips__link_map( image, FALSE,
|
|
(VipsSListMap2Fn) vips_image_invalidate_all_cb, NULL, NULL );
|
|
}
|
|
|
|
void
|
|
vips_image_minimise( VipsImage *image )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_minimise: %p\n", image );
|
|
|
|
g_signal_emit( image, vips_image_signals[SIG_MINIMISE], 0 );
|
|
}
|
|
|
|
static void *
|
|
vips_image_minimise_all_cb( VipsImage *image )
|
|
{
|
|
vips_image_minimise( image );
|
|
|
|
return( NULL );
|
|
}
|
|
|
|
/**
|
|
* vips_image_minimise_all:
|
|
* @image: #VipsImage to minimise
|
|
*
|
|
* Minimise memory use on this image and any upstream images, that is, images
|
|
* which this image depends upon. This function is called automatically at the
|
|
* end of a computation, but it might be useful to call at other times.
|
|
*
|
|
* The #VipsImage::minimise signal is emitted for all minimised images.
|
|
*/
|
|
void
|
|
vips_image_minimise_all( VipsImage *image )
|
|
{
|
|
(void) vips__link_map( image, TRUE,
|
|
(VipsSListMap2Fn) vips_image_minimise_all_cb, NULL, NULL );
|
|
}
|
|
|
|
/* Attach a new time struct, if necessary, and reset it.
|
|
*/
|
|
static int
|
|
vips_progress_add( VipsImage *image )
|
|
{
|
|
VipsProgress *progress;
|
|
|
|
VIPS_DEBUG_MSG( "vips_progress_add: %p\n", image );
|
|
|
|
if( !(progress = image->time) ) {
|
|
if( !(image->time = VIPS_NEW( NULL, VipsProgress )) )
|
|
return( -1 );
|
|
progress = image->time;
|
|
|
|
progress->im = image;
|
|
progress->start = NULL;
|
|
}
|
|
|
|
if( !progress->start )
|
|
progress->start = g_timer_new();
|
|
|
|
g_timer_start( progress->start );
|
|
progress->run = 0;
|
|
progress->eta = 0;
|
|
progress->tpels = VIPS_IMAGE_N_PELS( image );
|
|
progress->npels = 0;
|
|
progress->percent = 0;
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
static void
|
|
vips_progress_update( VipsProgress *progress, guint64 processed )
|
|
{
|
|
float prop;
|
|
|
|
VIPS_DEBUG_MSG( "vips_progress_update: %p\n", progress );
|
|
|
|
g_assert( progress );
|
|
|
|
progress->run = g_timer_elapsed( progress->start, NULL );
|
|
progress->npels = processed;
|
|
prop = (float) progress->npels / (float) progress->tpels;
|
|
progress->percent = 100 * prop;
|
|
|
|
/* Don't estimate eta until we are 10% in.
|
|
*/
|
|
if( prop > 0.1 )
|
|
progress->eta = (1.0 / prop) * progress->run - progress->run;
|
|
}
|
|
|
|
void
|
|
vips_image_preeval( VipsImage *image )
|
|
{
|
|
if( image->progress_signal ) {
|
|
VIPS_DEBUG_MSG( "vips_image_preeval: %p\n", image );
|
|
|
|
g_assert( vips_object_sanity(
|
|
VIPS_OBJECT( image->progress_signal ) ) );
|
|
|
|
(void) vips_progress_add( image );
|
|
|
|
/* For vips7 compat, we also have to make sure ->time on the
|
|
* image that was originally marked with
|
|
* vips_image_set_progress() is valid.
|
|
*/
|
|
(void) vips_progress_add( image->progress_signal );
|
|
|
|
if( !vips_image_get_typeof( image, "hide-progress" ) )
|
|
g_signal_emit( image->progress_signal,
|
|
vips_image_signals[SIG_PREEVAL], 0,
|
|
image->time );
|
|
}
|
|
}
|
|
|
|
/* Updated the number of pixels that have been processed.
|
|
*/
|
|
void
|
|
vips_image_eval( VipsImage *image, guint64 processed )
|
|
{
|
|
if( image->progress_signal &&
|
|
image->time ) {
|
|
VIPS_DEBUG_MSG( "vips_image_eval: %p\n", image );
|
|
|
|
g_assert( vips_object_sanity(
|
|
VIPS_OBJECT( image->progress_signal ) ) );
|
|
|
|
vips_progress_update( image->time, processed );
|
|
|
|
/* For vips7 compat, update the ->time on the signalling image
|
|
* too, even though it may have a different width/height to
|
|
* the image we are actually generating.
|
|
*/
|
|
if( image->progress_signal->time != image->time )
|
|
vips_progress_update( image->progress_signal->time,
|
|
processed );
|
|
|
|
if( !vips_image_get_typeof( image, "hide-progress" ) )
|
|
g_signal_emit( image->progress_signal,
|
|
vips_image_signals[SIG_EVAL], 0,
|
|
image->time );
|
|
}
|
|
}
|
|
|
|
void
|
|
vips_image_posteval( VipsImage *image )
|
|
{
|
|
if( image->progress_signal &&
|
|
image->progress_signal->time ) {
|
|
VIPS_DEBUG_MSG( "vips_image_posteval: %p\n", image );
|
|
|
|
g_assert( vips_object_sanity(
|
|
VIPS_OBJECT( image->progress_signal ) ) );
|
|
|
|
if( !vips_image_get_typeof( image, "hide-progress" ) )
|
|
g_signal_emit( image->progress_signal,
|
|
vips_image_signals[SIG_POSTEVAL], 0,
|
|
image->time );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vips_image_set_progress:
|
|
* @image: image to signal progress on
|
|
* @progress: turn progress reporting on or off
|
|
*
|
|
* vips signals evaluation progress via the #VipsImage::preeval,
|
|
* #VipsImage::eval and #VipsImage::posteval
|
|
* signals. Progress is signalled on the most-downstream image for which
|
|
* vips_image_set_progress() was called.
|
|
*/
|
|
void
|
|
vips_image_set_progress( VipsImage *image, gboolean progress )
|
|
{
|
|
if( progress &&
|
|
!image->progress_signal ) {
|
|
VIPS_DEBUG_MSG( "vips_image_set_progress: %p %s\n",
|
|
image, image->filename );
|
|
image->progress_signal = image;
|
|
}
|
|
else
|
|
image->progress_signal = NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* vips_image_iskilled:
|
|
* @image: image to test
|
|
*
|
|
* If @image has been killed (see vips_image_kill()), set an error message,
|
|
* clear the #VipsImage.kill flag and return %FALSE. Otherwise return %TRUE.
|
|
*
|
|
* Handy for loops which need to run sets of threads which can fail.
|
|
*
|
|
* See also: vips_image_kill().
|
|
*
|
|
* Returns: %FALSE if @image has been killed.
|
|
*/
|
|
gboolean
|
|
vips_image_iskilled( VipsImage *image )
|
|
{
|
|
gboolean kill;
|
|
|
|
kill = image->kill;
|
|
|
|
/* Has kill been set for this image? If yes, abort evaluation.
|
|
*/
|
|
if( image->kill ) {
|
|
VIPS_DEBUG_MSG( "vips_image_iskilled: %s (%p) killed\n",
|
|
image->filename, image );
|
|
vips_error( "VipsImage",
|
|
_( "killed for image \"%s\"" ), image->filename );
|
|
|
|
/* We've picked up the kill message, it's now our caller's
|
|
* responsibility to pass the message up the chain.
|
|
*/
|
|
vips_image_set_kill( image, FALSE );
|
|
}
|
|
|
|
return( kill );
|
|
}
|
|
|
|
/**
|
|
* vips_image_set_kill:
|
|
* @image: image to test
|
|
* @kill: the kill state
|
|
*
|
|
* Set the #VipsImage.kill flag on an image. Handy for stopping sets of
|
|
* threads.
|
|
*
|
|
* See also: vips_image_iskilled().
|
|
*
|
|
* Returns: %FALSE if @image has been killed.
|
|
*/
|
|
void
|
|
vips_image_set_kill( VipsImage *image, gboolean kill )
|
|
{
|
|
if( image->kill != kill )
|
|
VIPS_DEBUG_MSG( "vips_image_set_kill: %s (%p) %d\n",
|
|
image->filename, image, kill );
|
|
|
|
image->kill = kill;
|
|
}
|
|
|
|
/* Make a name for a filename-less image. Use immediately, don't free the
|
|
* result.
|
|
*/
|
|
static const char *
|
|
vips_image_temp_name( void )
|
|
{
|
|
static int serial = 0;
|
|
static char name[256];
|
|
|
|
vips_snprintf( name, 256, "temp-%d", serial++ );
|
|
|
|
return( name );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new:
|
|
*
|
|
* vips_image_new() creates a new, empty #VipsImage.
|
|
* If you write to one of these images, vips will just attach some callbacks,
|
|
* no pixels will be generated.
|
|
*
|
|
* Write pixels to an image with vips_image_generate() or
|
|
* vips_image_write_line(). Write a whole image to another image with
|
|
* vips_image_write().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new( void )
|
|
{
|
|
VipsImage *image;
|
|
|
|
vips_check_init();
|
|
|
|
image = VIPS_IMAGE( g_object_new( VIPS_TYPE_IMAGE, NULL ) );
|
|
g_object_set( image,
|
|
"filename", vips_image_temp_name(),
|
|
"mode", "p",
|
|
NULL );
|
|
if( vips_object_build( VIPS_OBJECT( image ) ) ) {
|
|
VIPS_UNREF( image );
|
|
return( NULL );
|
|
}
|
|
|
|
return( image );
|
|
}
|
|
|
|
VipsImage *
|
|
vips_image_new_mode( const char *filename, const char *mode )
|
|
{
|
|
VipsImage *image;
|
|
|
|
g_assert( filename );
|
|
g_assert( mode );
|
|
|
|
vips_check_init();
|
|
|
|
image = VIPS_IMAGE( g_object_new( VIPS_TYPE_IMAGE, NULL ) );
|
|
g_object_set( image,
|
|
"filename", filename,
|
|
"mode", mode,
|
|
NULL );
|
|
if( vips_object_build( VIPS_OBJECT( image ) ) ) {
|
|
VIPS_UNREF( image );
|
|
return( NULL );
|
|
}
|
|
|
|
return( image );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_memory:
|
|
*
|
|
* vips_image_new_memory() creates a new #VipsImage which, when written to, will
|
|
* create a memory image.
|
|
*
|
|
* See also: vips_image_new().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_memory( void )
|
|
{
|
|
return( vips_image_new_mode( vips_image_temp_name(), "t" ) );
|
|
}
|
|
|
|
/**
|
|
* vips_image_memory:
|
|
*
|
|
* A renamed vips_image_new_memory() ... Some gobject binding systems do not
|
|
* like more than one _new() method.
|
|
*
|
|
* See also: vips_image_new_memory().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_memory( void )
|
|
{
|
|
return( vips_image_new_memory() );
|
|
}
|
|
|
|
/**
|
|
* vips_filename_get_filename:
|
|
* @vips_filename: a filename including a set of options
|
|
*
|
|
* Given a vips filename like "fred.jpg[Q=90]", return a new string of
|
|
* just the filename part, "fred.jpg" in this case.
|
|
*
|
|
* Useful for language bindings.
|
|
*
|
|
* See also: vips_filename_get_options().
|
|
*
|
|
* Returns: transfer full: just the filename component.
|
|
*/
|
|
char *
|
|
vips_filename_get_filename( const char *vips_filename )
|
|
{
|
|
char filename[VIPS_PATH_MAX];
|
|
char options[VIPS_PATH_MAX];
|
|
|
|
vips__filename_split8( vips_filename, filename, options );
|
|
|
|
return( g_strdup( filename ) );
|
|
}
|
|
|
|
/**
|
|
* vips_filename_get_options:
|
|
* @vips_filename: a filename including a set of options
|
|
*
|
|
* Given a vips filename like "fred.jpg[Q=90]", return a new string of
|
|
* just the options part, "[Q=90]" in this case.
|
|
*
|
|
* Useful for language bindings.
|
|
*
|
|
* See also: vips_filename_get_filename().
|
|
*
|
|
* Returns: transfer full: just the options component.
|
|
*/
|
|
char *
|
|
vips_filename_get_options( const char *vips_filename )
|
|
{
|
|
char filename[VIPS_PATH_MAX];
|
|
char options[VIPS_PATH_MAX];
|
|
|
|
vips__filename_split8( vips_filename, filename, options );
|
|
|
|
return( g_strdup( options ) );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_from_file:
|
|
* @name: file to open
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Optional arguments:
|
|
*
|
|
* * @access: hint #VipsAccess mode to loader
|
|
* * @disc: load via a temporary disc file
|
|
*
|
|
* vips_image_new_from_file() opens @name for reading. It can load files
|
|
* in many image formats, including VIPS, TIFF, PNG, JPEG, FITS, Matlab,
|
|
* OpenEXR, CSV, WebP, Radiance, RAW, PPM and others.
|
|
*
|
|
* Load options may be appended to @filename as "[name=value,...]" or given as
|
|
* a NULL-terminated list of name-value pairs at the end of the arguments.
|
|
* Options given in the function call override options given in the filename.
|
|
* Many loaders add extra options, see vips_jpegload(), for example.
|
|
*
|
|
* vips_image_new_from_file() always returns immediately with the header
|
|
* fields filled in. No pixels are actually read until you first access them.
|
|
*
|
|
* @access lets you set a #VipsAccess hint giving the expected access pattern
|
|
* for this file.
|
|
* #VIPS_ACCESS_RANDOM means you can fetch pixels randomly from the image.
|
|
* This is the default mode. #VIPS_ACCESS_SEQUENTIAL means you will read the
|
|
* whole image exactly once, top-to-bottom. In this mode, vips can avoid
|
|
* converting the whole image in one go, for a large memory saving. You are
|
|
* allowed to make small non-local references, so area operations like
|
|
* convolution will work. #VIPS_ACCESS_SEQUENTIAL_UNBUFFERED does not allow
|
|
* non-local references, so will only work for very strict top-to-bottom
|
|
* operations, but does have very low memory needs.
|
|
*
|
|
* In #VIPS_ACCESS_RANDOM mode, small images are decompressed to memory and
|
|
* then processed from there. Large images are decompressed to temporary
|
|
* random-access files on disc and then processed from there. Set @disc to
|
|
* %TRUE to force loading via disc. See vips_image_new_temp_file() for an
|
|
* explanation of how VIPS selects a location for the temporary file.
|
|
*
|
|
* The disc threshold can be set with the "--vips-disc-threshold"
|
|
* command-line argument, or the VIPS_DISC_THRESHOLD environment variable.
|
|
* The value is a simple integer, but can take a unit postfix of "k",
|
|
* "m" or "g" to indicate kilobytes, megabytes or gigabytes.
|
|
* The default threshold is 100 MB.
|
|
*
|
|
* For example:
|
|
*
|
|
* |[
|
|
* VipsImage *image = vips_image_new_from_file ("fred.tif",
|
|
* "page", 12,
|
|
* NULL);
|
|
* ]|
|
|
*
|
|
* Will open "fred.tif", reading page 12.
|
|
*
|
|
* |[
|
|
* VipsImage *image = vips_image_new_from_file ("fred.jpg[shrink=2]",
|
|
* NULL);
|
|
* ]|
|
|
*
|
|
* Will open "fred.jpg", downsampling by a factor of two.
|
|
*
|
|
* Use vips_foreign_find_load() or vips_foreign_is_a() to see what format a
|
|
* file is in and therefore what options are available. If you need more
|
|
* control over the loading process, you can call loaders directly, see
|
|
* vips_jpegload(), for example.
|
|
*
|
|
* See also: vips_foreign_find_load(), vips_foreign_is_a(),
|
|
* vips_image_write_to_file().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_from_file( const char *name, ... )
|
|
{
|
|
char filename[VIPS_PATH_MAX];
|
|
char option_string[VIPS_PATH_MAX];
|
|
const char *operation_name;
|
|
va_list ap;
|
|
VipsImage *out;
|
|
int result;
|
|
|
|
vips_check_init();
|
|
|
|
vips__filename_split8( name, filename, option_string );
|
|
if( !(operation_name = vips_foreign_find_load( filename )) )
|
|
return( NULL );
|
|
|
|
va_start( ap, name );
|
|
result = vips_call_split_option_string( operation_name, option_string,
|
|
ap, filename, &out );
|
|
va_end( ap );
|
|
|
|
if( result )
|
|
return( NULL );
|
|
|
|
return( out );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_from_file_RW:
|
|
* @filename: filename to open
|
|
*
|
|
* Opens the named file for simultaneous reading and writing. This will only
|
|
* work for VIPS files in a format native to your machine. It is only for
|
|
* paintbox-type applications.
|
|
*
|
|
* See also: vips_draw_circle().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_from_file_RW( const char *filename )
|
|
{
|
|
return( vips_image_new_mode( filename, "rw" ) );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_from_file_raw:
|
|
* @filename: filename to open
|
|
* @xsize: image width
|
|
* @ysize: image height
|
|
* @bands: image bands (or bytes per pixel)
|
|
* @offset: bytes to skip at start of file
|
|
*
|
|
* This function maps the named file and returns a #VipsImage you can use to
|
|
* read it.
|
|
*
|
|
* It returns an 8-bit image with @bands bands. If the image is not 8-bit, use
|
|
* vips_copy() to transform the descriptor after loading it.
|
|
*
|
|
* See also: vips_copy(), vips_rawload(), vips_image_new_from_file().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_from_file_raw( const char *filename,
|
|
int xsize, int ysize, int bands, guint64 offset )
|
|
{
|
|
VipsImage *image;
|
|
|
|
vips_check_init();
|
|
|
|
image = VIPS_IMAGE( g_object_new( VIPS_TYPE_IMAGE, NULL ) );
|
|
g_object_set( image,
|
|
"filename", filename,
|
|
"mode", "a",
|
|
"width", xsize,
|
|
"height", ysize,
|
|
"bands", bands,
|
|
"sizeof_header", offset,
|
|
NULL );
|
|
if( vips_object_build( VIPS_OBJECT( image ) ) ) {
|
|
VIPS_UNREF( image );
|
|
return( NULL );
|
|
}
|
|
|
|
return( image );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_from_memory:
|
|
* @data: (array length=size) (element-type guint8) (transfer none): start of memory area
|
|
* @size: length of memory area
|
|
* @width: image width
|
|
* @height: image height
|
|
* @bands: image bands (or bytes per pixel)
|
|
* @format: image format
|
|
*
|
|
* This function wraps a #VipsImage around a memory area. The memory area
|
|
* must be a simple array, for example RGBRGBRGB, left-to-right,
|
|
* top-to-bottom. Use vips_image_new_from_buffer() to load an area of memory
|
|
* containing an image in a format.
|
|
*
|
|
* VIPS does not take
|
|
* responsibility for the area of memory, it's up to you to make sure it's
|
|
* freed when the image is closed. See for example #VipsObject::close.
|
|
*
|
|
* Because VIPS is "borrowing" @data from the caller, this function is
|
|
* extremely dangerous. Unless you are very careful, you will get crashes or
|
|
* memory corruption. Use vips_image_new_from_memory_copy() instead if you are
|
|
* at all unsure.
|
|
*
|
|
* Use vips_copy() to set other image properties.
|
|
*
|
|
* See also: vips_image_new(), vips_image_write_to_memory(),
|
|
* vips_image_new_from_memory_copy().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_from_memory( const void *data, size_t size,
|
|
int width, int height, int bands, VipsBandFormat format )
|
|
{
|
|
VipsImage *image;
|
|
|
|
vips_check_init();
|
|
|
|
image = VIPS_IMAGE( g_object_new( VIPS_TYPE_IMAGE, NULL ) );
|
|
g_object_set( image,
|
|
"filename", vips_image_temp_name(),
|
|
"mode", "m",
|
|
"foreign_buffer", data,
|
|
"width", width,
|
|
"height", height,
|
|
"bands", bands,
|
|
"format", format,
|
|
NULL );
|
|
if( vips_object_build( VIPS_OBJECT( image ) ) ) {
|
|
VIPS_UNREF( image );
|
|
return( NULL );
|
|
}
|
|
|
|
/* Allow len == 0, meaning don't check. Used for im_image()
|
|
* compatibility.
|
|
*/
|
|
if( size > 0 &&
|
|
size < VIPS_IMAGE_SIZEOF_IMAGE( image ) ) {
|
|
vips_error( "VipsImage",
|
|
_( "memory area too small --- "
|
|
"should be %zd bytes, you passed %zd" ),
|
|
VIPS_IMAGE_SIZEOF_IMAGE( image ), size );
|
|
VIPS_UNREF( image );
|
|
return( NULL );
|
|
}
|
|
|
|
return( image );
|
|
}
|
|
|
|
static void
|
|
vips_image_new_from_memory_copy_cb( VipsImage *image, void *data_copy )
|
|
{
|
|
vips_tracked_free( data_copy );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_from_memory_copy:
|
|
* @data: (array length=size) (element-type guint8) (transfer none): start of memory area
|
|
* @size: length of memory area
|
|
* @width: image width
|
|
* @height: image height
|
|
* @bands: image bands (or bytes per pixel)
|
|
* @format: image format
|
|
*
|
|
* Like vips_image_new_from_memory(), but VIPS will make a copy of the memory
|
|
* area. This
|
|
* means more memory use and an extra copy operation, but is much simpler and
|
|
* safer.
|
|
*
|
|
* See also: vips_image_new_from_memory().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_from_memory_copy( const void *data, size_t size,
|
|
int width, int height, int bands, VipsBandFormat format )
|
|
{
|
|
void *data_copy;
|
|
VipsImage *image;
|
|
|
|
vips_check_init();
|
|
|
|
if( !(data_copy = vips_tracked_malloc( size )) )
|
|
return( NULL );
|
|
memcpy( data_copy, data, size );
|
|
if( !(image = vips_image_new_from_memory( data_copy, size,
|
|
width, height, bands, format )) ) {
|
|
vips_tracked_free( data_copy );
|
|
return( NULL );
|
|
}
|
|
|
|
g_signal_connect( image, "close",
|
|
G_CALLBACK( vips_image_new_from_memory_copy_cb ), data_copy );
|
|
|
|
return( image );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_from_buffer:
|
|
* @buf: (array length=len) (element-type guint8) (transfer none): image data
|
|
* @len: length of memory buffer
|
|
* @option_string: set of extra options as a string
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Loads an image from the formatted area of memory @buf, @len using the
|
|
* loader recommended by vips_foreign_find_load_buffer().
|
|
* To load an unformatted area of memory, use
|
|
* vips_image_new_from_memory().
|
|
*
|
|
* VIPS does not take
|
|
* responsibility for the area of memory, it's up to you to make sure it's
|
|
* freed when the image is closed. See for example #VipsObject::close.
|
|
*
|
|
* Load options may be given in @option_string as "[name=value,...]" or given as
|
|
* a NULL-terminated list of name-value pairs at the end of the arguments.
|
|
* Options given in the function call override options given in the filename.
|
|
*
|
|
* See also: vips_image_write_to_buffer().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_from_buffer( const void *buf, size_t len,
|
|
const char *option_string, ... )
|
|
{
|
|
const char *operation_name;
|
|
VipsBlob *blob;
|
|
va_list ap;
|
|
int result;
|
|
VipsImage *out;
|
|
|
|
vips_check_init();
|
|
|
|
if( !(operation_name = vips_foreign_find_load_buffer( buf, len )) )
|
|
return( NULL );
|
|
|
|
/* We don't take a copy of the data or free it.
|
|
*/
|
|
blob = vips_blob_new( NULL, buf, len );
|
|
|
|
va_start( ap, option_string );
|
|
result = vips_call_split_option_string( operation_name,
|
|
option_string, ap, blob, &out );
|
|
va_end( ap );
|
|
|
|
vips_area_unref( VIPS_AREA( blob ) );
|
|
|
|
if( result )
|
|
return( NULL );
|
|
|
|
return( out );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_matrix:
|
|
* @width: image width
|
|
* @height: image height
|
|
*
|
|
* This convenience function makes an image which is a matrix: a one-band
|
|
* #VIPS_FORMAT_DOUBLE image held in memory.
|
|
*
|
|
* Use VIPS_IMAGE_ADDR(), or VIPS_MATRIX() to address pixels in the image.
|
|
*
|
|
* Use vips_image_set_double() to set "scale" and "offset", if required.
|
|
*
|
|
* See also: vips_image_new_matrixv()
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_matrix( int width, int height )
|
|
{
|
|
VipsImage *image;
|
|
|
|
vips_check_init();
|
|
|
|
image = VIPS_IMAGE( g_object_new( VIPS_TYPE_IMAGE, NULL ) );
|
|
g_object_set( image,
|
|
"filename", "vips_image_new_matrix",
|
|
"mode", "t",
|
|
"width", width,
|
|
"height", height,
|
|
"bands", 1,
|
|
"format", VIPS_FORMAT_DOUBLE,
|
|
"interpretation", VIPS_INTERPRETATION_MATRIX,
|
|
NULL );
|
|
if( vips_object_build( VIPS_OBJECT( image ) ) ) {
|
|
VIPS_UNREF( image );
|
|
return( NULL );
|
|
}
|
|
|
|
if( vips_image_write_prepare( image ) ) {
|
|
g_object_unref( image );
|
|
return( NULL );
|
|
}
|
|
|
|
return( image );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_matrixv:
|
|
* @width: image width
|
|
* @height: image height
|
|
* @...: matrix coefficients
|
|
*
|
|
* As vips_image_new_matrix(), but initialise the matrix from the argument
|
|
* list. After @height should be @width * @height double constants which are
|
|
* used to set the matrix elements.
|
|
*
|
|
* See also: vips_image_new_matrix()
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_matrixv( int width, int height, ... )
|
|
{
|
|
va_list ap;
|
|
VipsImage *matrix;
|
|
int x, y;
|
|
|
|
vips_check_init();
|
|
|
|
matrix = vips_image_new_matrix( width, height );
|
|
|
|
va_start( ap, height );
|
|
for( y = 0; y < height; y++ )
|
|
for( x = 0; x < width; x++ )
|
|
*VIPS_MATRIX( matrix, x, y ) = va_arg( ap, double );
|
|
va_end( ap );
|
|
|
|
return( matrix );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_matrix_from_array:
|
|
* @width: image width
|
|
* @height: image height
|
|
* @array: (array length=size) (transfer none): array of elements
|
|
* @size: number of elements
|
|
*
|
|
* A binding-friendly version of vips_image_new_matrixv().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_matrix_from_array( int width, int height,
|
|
const double *array, int size )
|
|
{
|
|
VipsImage *matrix;
|
|
int x, y;
|
|
int i;
|
|
|
|
if( size != width * height ) {
|
|
vips_error( "VipsImage",
|
|
_( "bad array length --- should be %d, you passed %d" ),
|
|
width * height, size );
|
|
return( NULL );
|
|
}
|
|
|
|
vips_check_init();
|
|
|
|
matrix = vips_image_new_matrix( width, height );
|
|
|
|
i = 0;
|
|
for( y = 0; y < height; y++ )
|
|
for( x = 0; x < width; x++ )
|
|
*VIPS_MATRIX( matrix, x, y ) = array[i++];
|
|
|
|
return( matrix );
|
|
}
|
|
|
|
/**
|
|
* vips_image_matrix_from_array:
|
|
* @width: image width
|
|
* @height: image height
|
|
* @array: (array length=size) (transfer none): array of elements
|
|
* @size: number of elements
|
|
*
|
|
* A renamed vips_image_new_matrix_from_array(). Some gobject bindings do not
|
|
* like more than one _new method.
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_matrix_from_array( int width, int height,
|
|
const double *array, int size )
|
|
{
|
|
return( vips_image_new_matrix_from_array( width, height,
|
|
array, size ) );
|
|
}
|
|
|
|
/**
|
|
* vips_image_set_delete_on_close:
|
|
* @image: image to set
|
|
* @delete_on_close: format of file
|
|
*
|
|
* Sets the delete_on_close flag for the image. If this flag is set, when
|
|
* @image is finalized, the filename held in @image->filename at the time of
|
|
* this call is deleted.
|
|
*
|
|
* This function is clearly extremely dangerous, use with great caution.
|
|
*
|
|
* See also: vips_image_new_temp_file().
|
|
*/
|
|
void
|
|
vips_image_set_delete_on_close( VipsImage *image, gboolean delete_on_close )
|
|
{
|
|
VIPS_DEBUG_MSG( "vips_image_set_delete_on_close: %d %s\n",
|
|
delete_on_close, image->filename );
|
|
|
|
image->delete_on_close = delete_on_close;
|
|
VIPS_FREE( image->delete_on_close_filename );
|
|
if( delete_on_close )
|
|
VIPS_SETSTR( image->delete_on_close_filename, image->filename );
|
|
}
|
|
|
|
/**
|
|
* vips_get_disc_threshold:
|
|
*
|
|
* Return the number of bytes at which we flip between open via memory and
|
|
* open via disc. This defaults to 100mb, but can be changed with the
|
|
* VIPS_DISC_THRESHOLD environment variable or the --vips-disc-threshold
|
|
* command-line flag. See vips_image_new_from_file().
|
|
*
|
|
* Returns: disc threshold in bytes.
|
|
*/
|
|
guint64
|
|
vips_get_disc_threshold( void )
|
|
{
|
|
static gboolean done = FALSE;
|
|
static guint64 threshold;
|
|
|
|
if( !done ) {
|
|
const char *env;
|
|
|
|
done = TRUE;
|
|
|
|
/* 100mb default.
|
|
*/
|
|
threshold = 100 * 1024 * 1024;
|
|
|
|
if( (env = g_getenv( "VIPS_DISC_THRESHOLD" )) ||
|
|
(env = g_getenv( "IM_DISC_THRESHOLD" )) )
|
|
threshold = vips__parse_size( env );
|
|
|
|
if( vips__disc_threshold )
|
|
threshold = vips__parse_size( vips__disc_threshold );
|
|
|
|
#ifdef DEBUG
|
|
printf( "vips_get_disc_threshold: %zd bytes\n", threshold );
|
|
#endif /*DEBUG*/
|
|
}
|
|
|
|
return( threshold );
|
|
}
|
|
|
|
/**
|
|
* vips_image_new_temp_file:
|
|
* @format: format of file
|
|
*
|
|
* Make a #VipsImage which, when written to, will create a temporary file on
|
|
* disc. The file will be automatically deleted when the image is destroyed.
|
|
* @format is something like "%s.v" for a vips file.
|
|
*
|
|
* The file is created in the temporary directory. This is set with the
|
|
* environment variable TMPDIR. If this is not set, then on Unix systems, vips
|
|
* will default to /tmp. On Windows, vips uses GetTempPath() to find the
|
|
* temporary directory.
|
|
*
|
|
* vips uses g_mkstemp() to make the temporary filename. They generally look
|
|
* something like "vips-12-EJKJFGH.v".
|
|
*
|
|
* See also: vips_image_new().
|
|
*
|
|
* Returns: the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_new_temp_file( const char *format )
|
|
{
|
|
char *name;
|
|
VipsImage *image;
|
|
|
|
vips_check_init();
|
|
|
|
if( !(name = vips__temp_name( format )) )
|
|
return( NULL );
|
|
|
|
if( !(image = vips_image_new_mode( name, "w" )) ) {
|
|
g_free( name );
|
|
return( NULL );
|
|
}
|
|
|
|
g_free( name );
|
|
|
|
vips_image_set_delete_on_close( image, TRUE );
|
|
|
|
return( image );
|
|
}
|
|
|
|
static int
|
|
vips_image_write_gen( VipsRegion *or,
|
|
void *seq, void *a, void *b, gboolean *stop )
|
|
{
|
|
VipsRegion *ir = (VipsRegion *) seq;
|
|
VipsRect *r = &or->valid;
|
|
|
|
/*
|
|
printf( "vips_image_write_gen: %p "
|
|
"left = %d, top = %d, width = %d, height = %d\n",
|
|
or->im,
|
|
r->left, r->top, r->width, r->height );
|
|
*/
|
|
|
|
/* Copy with pointers.
|
|
*/
|
|
if( vips_region_prepare( ir, r ) ||
|
|
vips_region_region( or, ir, r, r->left, r->top ) )
|
|
return( -1 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_write:
|
|
* @image: image to write
|
|
* @out: write to this image
|
|
*
|
|
* Write @image to @out. Use vips_image_new() and friends to create the
|
|
* #VipsImage you want to write to.
|
|
*
|
|
* See also: vips_image_new(), vips_copy(), vips_image_write_to_file().
|
|
*
|
|
* Returns: 0 on success, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_write( VipsImage *image, VipsImage *out )
|
|
{
|
|
if( vips_image_pio_input( image ) ||
|
|
vips_image_pipelinev( out,
|
|
VIPS_DEMAND_STYLE_THINSTRIP, image, NULL ) )
|
|
return( -1 );
|
|
|
|
if( vips_image_generate( out,
|
|
vips_start_one, vips_image_write_gen, vips_stop_one,
|
|
image, NULL ) )
|
|
return( -1 );
|
|
|
|
/* If @out is a partial image, we need to make sure that @image stays
|
|
* alive as long as @out is alive.
|
|
*
|
|
* If it's not partial, perhaps a file we write to, or a memory image,
|
|
* it's fine for @image to go away.
|
|
*/
|
|
if( vips_image_ispartial( out ) ) {
|
|
g_object_ref( image );
|
|
vips_object_local( out, image );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_write_to_file:
|
|
* @image: image to write
|
|
* @name: write to this file
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Writes @in to @name using the saver recommended by
|
|
* vips_foreign_find_save().
|
|
*
|
|
* Save options may be appended to @filename as "[name=value,...]" or given as
|
|
* a NULL-terminated list of name-value pairs at the end of the arguments.
|
|
* Options given in the function call override options given in the filename.
|
|
*
|
|
* See also: vips_image_new_from_file().
|
|
*
|
|
* Returns: 0 on success, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_write_to_file( VipsImage *image, const char *name, ... )
|
|
{
|
|
char filename[VIPS_PATH_MAX];
|
|
char option_string[VIPS_PATH_MAX];
|
|
const char *operation_name;
|
|
va_list ap;
|
|
int result;
|
|
|
|
vips__filename_split8( name, filename, option_string );
|
|
if( !(operation_name = vips_foreign_find_save( filename )) )
|
|
return( -1 );
|
|
|
|
va_start( ap, name );
|
|
result = vips_call_split_option_string( operation_name, option_string,
|
|
ap, image, filename );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_image_write_to_buffer:
|
|
* @in: image to write
|
|
* @suffix: format to write
|
|
* @buf: (array length=size) (element-type guint8) (transfer full): return buffer start here
|
|
* @size: return buffer length here
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Writes @in to a memory buffer in a format specified by @suffix.
|
|
*
|
|
* Save options may be appended to @suffix as "[name=value,...]" or given as
|
|
* a NULL-terminated list of name-value pairs at the end of the arguments.
|
|
* Options given in the function call override options given in the filename.
|
|
*
|
|
* Currently only TIFF, JPEG and PNG formats are supported.
|
|
*
|
|
* You can call the various save operations directly if you wish, see
|
|
* vips_jpegsave_buffer(), for example.
|
|
*
|
|
* See also: vips_image_write_to_memory(), vips_image_new_from_buffer().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_image_write_to_buffer( VipsImage *in,
|
|
const char *suffix, void **buf, size_t *size,
|
|
... )
|
|
{
|
|
char filename[VIPS_PATH_MAX];
|
|
char option_string[VIPS_PATH_MAX];
|
|
const char *operation_name;
|
|
VipsBlob *blob;
|
|
va_list ap;
|
|
int result;
|
|
|
|
vips__filename_split8( suffix, filename, option_string );
|
|
if( !(operation_name = vips_foreign_find_save_buffer( filename )) )
|
|
return( -1 );
|
|
|
|
va_start( ap, size );
|
|
result = vips_call_split_option_string( operation_name, option_string,
|
|
ap, in, &blob );
|
|
va_end( ap );
|
|
|
|
if( blob ) {
|
|
if( buf ) {
|
|
*buf = VIPS_AREA( blob )->data;
|
|
VIPS_AREA( blob )->free_fn = NULL;
|
|
}
|
|
if( size )
|
|
*size = VIPS_AREA( blob )->length;
|
|
|
|
vips_area_unref( VIPS_AREA( blob ) );
|
|
}
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_image_write_to_memory:
|
|
* @in: image to write
|
|
* @size: return buffer length here
|
|
*
|
|
* Writes @in to memory as a simple, unformatted C-style array.
|
|
*
|
|
* The caller is responsible for freeing this memory.
|
|
*
|
|
* See also: vips_image_write_to_buffer().
|
|
*
|
|
* Returns: (array length=size) (element-type guint8) (transfer full): return buffer start here
|
|
*/
|
|
void *
|
|
vips_image_write_to_memory( VipsImage *in, size_t *size_out )
|
|
{
|
|
void *buf;
|
|
size_t size;
|
|
VipsImage *x;
|
|
|
|
size = VIPS_IMAGE_SIZEOF_IMAGE( in );
|
|
if( !(buf = g_try_malloc( size )) ) {
|
|
vips_error( "vips_image_write_to_memory",
|
|
_( "out of memory --- size == %dMB" ),
|
|
(int) (size / (1024.0 * 1024.0)) );
|
|
g_warning( _( "out of memory --- size == %dMB" ),
|
|
(int) (size / (1024.0 * 1024.0)) );
|
|
return( NULL );
|
|
}
|
|
|
|
x = vips_image_new_from_memory( buf, size,
|
|
in->Xsize, in->Ysize, in->Bands, in->BandFmt );
|
|
if( vips_image_write( in, x ) ) {
|
|
g_object_unref( x );
|
|
g_free( buf );
|
|
return( NULL );
|
|
}
|
|
g_object_unref( x );
|
|
|
|
if( size_out )
|
|
*size_out = size;
|
|
|
|
return( buf );
|
|
}
|
|
|
|
/**
|
|
* vips_image_decode:
|
|
* @in: image to decode
|
|
* @out: write to this image
|
|
*
|
|
* A convenience function to unpack to a format that we can compute with.
|
|
* @out.coding is always #VIPS_CODING_NONE.
|
|
*
|
|
* This unpacks LABQ to plain LAB. Use vips_LabQ2LabS() for a bit more speed
|
|
* if you need it.
|
|
*
|
|
* See also: vips_image_encode(), vips_LabQ2Lab(), vips_rad2float().
|
|
*
|
|
* Returns: 0 on success, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_decode( VipsImage *in, VipsImage **out )
|
|
{
|
|
/* Keep in sync with vips__vector_to_ink().
|
|
*/
|
|
if( in->Coding == VIPS_CODING_LABQ ) {
|
|
if( vips_LabQ2Lab( in, out, NULL ) )
|
|
return( -1 );
|
|
}
|
|
else if( in->Coding == VIPS_CODING_RAD ) {
|
|
if( vips_rad2float( in, out, NULL ) )
|
|
return( -1 );
|
|
}
|
|
else {
|
|
if( vips_copy( in, out, NULL ) )
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_decode_predict:
|
|
* @in: image to decode
|
|
* @bands: predict bands here
|
|
* @format: predict format here
|
|
*
|
|
* We often need to know what an image will decode to without actually
|
|
* decoding it, for example, in arg checking.
|
|
*
|
|
* See also: vips_image_decode().
|
|
*/
|
|
int
|
|
vips_image_decode_predict( VipsImage *in,
|
|
int *out_bands, VipsBandFormat *out_format )
|
|
{
|
|
VipsBandFormat format;
|
|
int bands;
|
|
|
|
if( in->Coding == VIPS_CODING_LABQ ) {
|
|
bands = 3;
|
|
format = VIPS_FORMAT_FLOAT;
|
|
}
|
|
else if( in->Coding == VIPS_CODING_RAD ) {
|
|
bands = 3;
|
|
format = VIPS_FORMAT_FLOAT;
|
|
}
|
|
else {
|
|
bands = in->Bands;
|
|
format = in->BandFmt;
|
|
}
|
|
|
|
if( out_bands )
|
|
*out_bands = bands;
|
|
if( out_format )
|
|
*out_format = format;
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_encode:
|
|
* @in: image to encode
|
|
* @out: write to this image
|
|
* @coding: coding to apply
|
|
*
|
|
* A convenience function to pack to a coding. The inverse of
|
|
* vips_image_decode().
|
|
*
|
|
* See also: vips_image_decode().
|
|
*
|
|
* Returns: 0 on success, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_encode( VipsImage *in, VipsImage **out, VipsCoding coding )
|
|
{
|
|
if( coding == VIPS_CODING_LABQ ) {
|
|
if( vips_Lab2LabQ( in, out, NULL ) )
|
|
return( -1 );
|
|
}
|
|
else if( coding == VIPS_CODING_RAD ) {
|
|
if( vips_float2rad( in, out, NULL ) )
|
|
return( -1 );
|
|
}
|
|
else {
|
|
if( vips_copy( in, out, NULL ) )
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_isMSBfirst:
|
|
* @image: image to test
|
|
*
|
|
* Return %TRUE if @image is in most-significant-
|
|
* byte first form. This is the byte order used on the SPARC
|
|
* architecture and others.
|
|
*/
|
|
gboolean
|
|
vips_image_isMSBfirst( VipsImage *image )
|
|
{
|
|
if( image->magic == VIPS_MAGIC_SPARC )
|
|
return( 1 );
|
|
else
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_isfile:
|
|
* @image: image to test
|
|
*
|
|
* Return %TRUE if @image represents a file on disc in some way.
|
|
*/
|
|
gboolean vips_image_isfile( VipsImage *image )
|
|
{
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_MMAPIN:
|
|
case VIPS_IMAGE_MMAPINRW:
|
|
case VIPS_IMAGE_OPENOUT:
|
|
case VIPS_IMAGE_OPENIN:
|
|
return( 1 );
|
|
|
|
case VIPS_IMAGE_PARTIAL:
|
|
case VIPS_IMAGE_SETBUF:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
case VIPS_IMAGE_NONE:
|
|
return( 0 );
|
|
|
|
default:
|
|
g_assert( FALSE );
|
|
return( 0 );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vips_image_ispartial:
|
|
* @image: image to test
|
|
*
|
|
* Return %TRUE if @im represents a partial image (a delayed calculation).
|
|
*/
|
|
gboolean
|
|
vips_image_ispartial( VipsImage *image )
|
|
{
|
|
if( image->dtype == VIPS_IMAGE_PARTIAL )
|
|
return( 1 );
|
|
else
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_hasalpha:
|
|
* @image: image to check
|
|
*
|
|
* libvips assumes an image has an alpha if it has two bands (ie. it is a
|
|
* monochrome image with an extra band), if it has four bands (unless it's been
|
|
* tagged as CMYK), or if it has more than four bands.
|
|
*
|
|
* Return %TRUE if @image has an alpha channel.
|
|
*/
|
|
gboolean
|
|
vips_image_hasalpha( VipsImage *image )
|
|
{
|
|
return( image->Bands == 2 ||
|
|
(image->Bands == 4 && image->Type != VIPS_INTERPRETATION_CMYK) ||
|
|
image->Bands > 4 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_write_prepare:
|
|
* @image: image to prepare
|
|
*
|
|
* Call this after setting header fields (width, height, and so on) to
|
|
* allocate resources ready for writing.
|
|
*
|
|
* Normally this function is called for you by vips_image_generate() or
|
|
* vips_image_write_line(). You will need to call it yourself if you plan to
|
|
* write directly to the ->data member of a memory image.
|
|
*
|
|
* Returns: 0 on success, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_write_prepare( VipsImage *image )
|
|
{
|
|
if( !vips_object_sanity( VIPS_OBJECT( image ) ) )
|
|
return( -1 );
|
|
|
|
if( image->Xsize <= 0 ||
|
|
image->Ysize <= 0 ||
|
|
image->Bands <= 0 ) {
|
|
vips_error( "VipsImage", "%s", _( "bad dimensions" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
/* We don't use this, but make sure it's set in case any old programs
|
|
* are expecting it.
|
|
*/
|
|
image->Bbits = vips_format_sizeof( image->BandFmt ) << 3;
|
|
|
|
if( image->dtype == VIPS_IMAGE_PARTIAL ) {
|
|
VIPS_DEBUG_MSG( "vips_image_write_prepare: "
|
|
"old-style output for %s\n", image->filename );
|
|
|
|
image->dtype = VIPS_IMAGE_SETBUF;
|
|
}
|
|
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_MMAPINRW:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
break;
|
|
|
|
case VIPS_IMAGE_SETBUF:
|
|
if( !image->data &&
|
|
!(image->data = vips_tracked_malloc(
|
|
VIPS_IMAGE_SIZEOF_IMAGE( image ))) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_OPENOUT:
|
|
if( vips_image_open_output( image ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
default:
|
|
vips_error( "VipsImage", "%s", _( "bad image descriptor" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_write_line:
|
|
* @image: image to write to
|
|
* @ypos: vertical position of scan-line to write
|
|
* @linebuffer: scanline of pixels
|
|
*
|
|
* Write a line of pixels to an image. This function must be called repeatedly
|
|
* with @ypos increasing from 0 to #VipsImage::height .
|
|
* @linebuffer must be VIPS_IMAGE_SIZEOF_LINE() bytes long.
|
|
*
|
|
* See also: vips_image_generate().
|
|
*
|
|
* Returns: 0 on success, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_write_line( VipsImage *image, int ypos, VipsPel *linebuffer )
|
|
{
|
|
int linesize = VIPS_IMAGE_SIZEOF_LINE( image );
|
|
|
|
/* Is this the start of eval?
|
|
*/
|
|
if( ypos == 0 ) {
|
|
if( vips__image_wio_output( image ) )
|
|
return( -1 );
|
|
|
|
/* Always clear kill before we start looping. See the
|
|
* call to vips_image_iskilled() below.
|
|
*/
|
|
vips_image_set_kill( image, FALSE );
|
|
vips_image_write_prepare( image );
|
|
vips_image_preeval( image );
|
|
}
|
|
|
|
/* Possible cases for output: FILE or SETBUF.
|
|
*/
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_SETBUF:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
memcpy( VIPS_IMAGE_ADDR( image, 0, ypos ),
|
|
linebuffer, linesize );
|
|
break;
|
|
|
|
case VIPS_IMAGE_OPENOUT:
|
|
/* Don't use ypos for this.
|
|
*/
|
|
if( vips__write( image->fd, linebuffer, linesize ) )
|
|
return( -1 );
|
|
break;
|
|
|
|
default:
|
|
vips_error( "VipsImage",
|
|
_( "unable to output to a %s image" ),
|
|
vips_enum_string( VIPS_TYPE_IMAGE_TYPE,
|
|
image->dtype ) );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Trigger evaluation callbacks for this image.
|
|
*/
|
|
vips_image_eval( image, ypos * image->Xsize );
|
|
if( vips_image_iskilled( image ) )
|
|
return( -1 );
|
|
|
|
/* Is this the end of eval?
|
|
*/
|
|
if( ypos == image->Ysize - 1 ) {
|
|
vips_image_posteval( image );
|
|
if( vips_image_written( image ) )
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Rewind an output file. VIPS images only.
|
|
*/
|
|
static int
|
|
vips_image_rewind_output( VipsImage *image )
|
|
{
|
|
int fd;
|
|
|
|
g_assert( image->dtype == VIPS_IMAGE_OPENOUT );
|
|
|
|
#ifdef DEBUG_IO
|
|
printf( "vips_image_rewind_output: %s\n", image->filename );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
/* We want to keep the fd across rewind.
|
|
*
|
|
* On Windows, we open temp files with _O_TEMPORARY. We mustn't close
|
|
* the file since this will delete it.
|
|
*
|
|
* We could open the file again to keep a reference to it alive, but
|
|
* this is also problematic on Windows.
|
|
*/
|
|
fd = image->fd;
|
|
image->fd = -1;
|
|
|
|
/* Free any resources the image holds and reset to a base
|
|
* state.
|
|
*/
|
|
vips_object_rewind( VIPS_OBJECT( image ) );
|
|
|
|
/* And reopen ... recurse to get a mmaped image.
|
|
*
|
|
* We use "v" mode to get it opened as a vips image, bypassing the
|
|
* file type checks. They will fail on Windows because you can't open
|
|
* fds more than once.
|
|
*/
|
|
image->fd = fd;
|
|
g_object_set( image,
|
|
"mode", "v",
|
|
NULL );
|
|
if( vips_object_build( VIPS_OBJECT( image ) ) ) {
|
|
vips_error( "VipsImage",
|
|
_( "auto-rewind for %s failed" ),
|
|
image->filename );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Now we've finished writing and reopened as read, we can
|
|
* delete-on-close.
|
|
*
|
|
* On *nix-like systems, this will unlink the file
|
|
* from the filesystem and when we exit, for whatever reason, the file
|
|
* we be reclaimed.
|
|
*
|
|
* On Windows this will fail because the file is open and you can't
|
|
* delete open files. However, on Windows we set O_TEMP, so the file
|
|
* will be deleted when the fd is finally closed.
|
|
*/
|
|
vips_image_delete( image );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_copy_memory:
|
|
* @image: image to copy to a memory buffer
|
|
*
|
|
* Allocate a memory buffer and copy @image to it. This is a thread-safe
|
|
* equivalent of vips_image_wio_input(), useful if @image is small and from an
|
|
* unknown source.
|
|
*
|
|
* If @image is already in memory (perhaps a mmaped file on disc),
|
|
* vips_image_copy_memory() will just ref @image and return that.
|
|
*
|
|
* If you are sure that @image is not shared with another thread (perhaps you
|
|
* have made it yourself), use vips_image_wio_input() instead.
|
|
*
|
|
* See also: vips_image_wio_input().
|
|
*
|
|
* Returns: (transfer full): the new #VipsImage, or %NULL on error.
|
|
*/
|
|
VipsImage *
|
|
vips_image_copy_memory( VipsImage *image )
|
|
{
|
|
VipsImage *new;
|
|
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_SETBUF:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
case VIPS_IMAGE_MMAPIN:
|
|
case VIPS_IMAGE_MMAPINRW:
|
|
/* Can read from all these, in principle anyway.
|
|
*/
|
|
new = image;
|
|
g_object_ref( new );
|
|
break;
|
|
|
|
case VIPS_IMAGE_OPENOUT:
|
|
case VIPS_IMAGE_OPENIN:
|
|
case VIPS_IMAGE_PARTIAL:
|
|
/* Copy to a new memory image.
|
|
*/
|
|
new = vips_image_new_memory();
|
|
if( vips_image_write( image, new ) ) {
|
|
g_object_unref( new );
|
|
return( NULL );
|
|
}
|
|
break;
|
|
|
|
default:
|
|
vips_error( "vips_image_copy_memory",
|
|
"%s", _( "image not readable" ) );
|
|
return( NULL );
|
|
}
|
|
|
|
return( new );
|
|
}
|
|
|
|
/**
|
|
* vips_image_wio_input:
|
|
* @image: image to transform
|
|
*
|
|
* Check that an image is readable via the VIPS_IMAGE_ADDR() macro, that is,
|
|
* that the entire image is in memory and all pixels can be read with
|
|
* VIPS_IMAGE_ADDR(). If it
|
|
* isn't, try to transform it so that VIPS_IMAGE_ADDR() can work.
|
|
*
|
|
* Since this function modifies @image, it is not thread-safe. Only call it on
|
|
* images which you are sure have not been shared with another thread. If the
|
|
* image might have been shared, use the less efficient
|
|
* vips_image_copy_memory() instead.
|
|
*
|
|
* See also: vips_image_copy_memory(), vips_image_pio_input(), vips_image_inplace(), VIPS_IMAGE_ADDR().
|
|
*
|
|
* Returns: 0 on succeess, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_wio_input( VipsImage *image )
|
|
{
|
|
VipsImage *t1;
|
|
|
|
if( !vips_object_sanity( VIPS_OBJECT( image ) ) )
|
|
return( -1 );
|
|
|
|
#ifdef DEBUG_IO
|
|
printf( "vips_image_wio_input: wio input for %s\n",
|
|
image->filename );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_SETBUF:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
/* Should have been written to.
|
|
*/
|
|
if( !image->data ) {
|
|
vips_error( "vips_image_wio_input",
|
|
"%s", _( "no image data" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_MMAPIN:
|
|
case VIPS_IMAGE_MMAPINRW:
|
|
/* Can read from all these, in principle anyway.
|
|
*/
|
|
break;
|
|
|
|
case VIPS_IMAGE_PARTIAL:
|
|
#ifdef DEBUG_IO
|
|
printf( "vips_image_wio_input: "
|
|
"converting partial image to WIO\n" );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
/* Change to VIPS_IMAGE_SETBUF. First, make a memory
|
|
* buffer and copy into that.
|
|
*/
|
|
t1 = vips_image_new_memory();
|
|
if( vips_image_write( image, t1 ) ) {
|
|
g_object_unref( t1 );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Copy new stuff in. We can't unref and free stuff, as this
|
|
* would kill of lots of regions and cause dangling pointers
|
|
* elsewhere.
|
|
*/
|
|
image->dtype = VIPS_IMAGE_SETBUF;
|
|
image->data = t1->data;
|
|
t1->data = NULL;
|
|
|
|
/* Close temp image.
|
|
*/
|
|
g_object_unref( t1 );
|
|
|
|
/* We need to zap any start/gen/stop callbacks. If we don't,
|
|
* calling vips_region_prepare_to() later to read from this
|
|
* image will fail, since it will think it needs to create the
|
|
* image, not read from it.
|
|
*/
|
|
image->start_fn = NULL;
|
|
image->generate_fn = NULL;
|
|
image->stop_fn = NULL;
|
|
image->client1 = NULL;
|
|
image->client2 = NULL;
|
|
|
|
/* ... and that may confuse any regions which are trying to
|
|
* generate from this image.
|
|
*/
|
|
if( image->regions )
|
|
g_warning( "rewinding image with active regions" );
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_OPENIN:
|
|
#ifdef DEBUG_IO
|
|
printf( "vips_image_wio_input: "
|
|
"converting openin image for wio input\n" );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
/* just mmap() the whole thing.
|
|
*/
|
|
if( vips_mapfile( image ) )
|
|
return( -1 );
|
|
image->data = image->baseaddr + image->sizeof_header;
|
|
image->dtype = VIPS_IMAGE_MMAPIN;
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_OPENOUT:
|
|
/* Close file down and reopen as input. I guess this will only
|
|
* work for vips files?
|
|
*/
|
|
if( vips_image_rewind_output( image ) ||
|
|
vips_image_wio_input( image ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
default:
|
|
vips_error( "vips_image_wio_input",
|
|
"%s", _( "image not readable" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
int
|
|
vips__image_wio_output( VipsImage *image )
|
|
{
|
|
#ifdef DEBUG_IO
|
|
printf( "vips__image_wio_output: WIO output for %s\n",
|
|
image->filename );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_PARTIAL:
|
|
/* Make sure nothing is attached.
|
|
*/
|
|
if( image->generate_fn ) {
|
|
vips_error( "vips__image_wio_output",
|
|
"%s", _( "image already written" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Cannot do old-style write to PARTIAL. Turn to SETBUF.
|
|
*/
|
|
image->dtype = VIPS_IMAGE_SETBUF;
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_SETBUF:
|
|
case VIPS_IMAGE_OPENOUT:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
/* Can write to this ok.
|
|
*
|
|
* We used to check that ->data was null and warn about
|
|
* writing twice, but we no longer insist that this is called
|
|
* before vips_image_write_prepare(), so we can't do that any
|
|
* more.
|
|
*/
|
|
break;
|
|
|
|
default:
|
|
vips_error( "vips__image_wio_output",
|
|
"%s", _( "image not writeable" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_inplace:
|
|
* @image: image to make read-write
|
|
*
|
|
* Gets @image ready for an in-place operation, such as vips_draw_circle().
|
|
* After calling this function you can both read and write the image with
|
|
* VIPS_IMAGE_ADDR().
|
|
*
|
|
* Since this function modifies @image, it is not thread-safe. Only call it on
|
|
* images which you are sure have not been shared with another thread.
|
|
* All in-place operations are inherently not thread-safe, so you need to take
|
|
* great care in any case.
|
|
*
|
|
* See also: vips_draw_circle(), vips_image_wio_input().
|
|
*
|
|
* Returns: 0 on succeess, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_inplace( VipsImage *image )
|
|
{
|
|
/* Do an vips_image_wio_input(). This will rewind, generate, etc.
|
|
*/
|
|
if( vips_image_wio_input( image ) )
|
|
return( -1 );
|
|
|
|
/* Look at the type.
|
|
*/
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_SETBUF:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
case VIPS_IMAGE_MMAPINRW:
|
|
/* No action necessary.
|
|
*/
|
|
break;
|
|
|
|
case VIPS_IMAGE_MMAPIN:
|
|
/* Try to remap read-write.
|
|
*/
|
|
if( vips_remapfilerw( image ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
default:
|
|
vips_error( "vips_image_inplace",
|
|
"%s", _( "bad file type" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
/* This image is about to be changed (probably). Make sure it's not
|
|
* in cache.
|
|
*/
|
|
vips_image_invalidate_all( image );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_pio_input:
|
|
* @image: image to check
|
|
*
|
|
* Check that an image is readable with vips_region_prepare() and friends.
|
|
* If it isn't, try to transform the image so that vips_region_prepare() can
|
|
* work.
|
|
*
|
|
* See also: vips_image_pio_output(), vips_region_prepare().
|
|
*
|
|
* Returns: 0 on succeess, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_pio_input( VipsImage *image )
|
|
{
|
|
if( !vips_object_sanity( VIPS_OBJECT( image ) ) )
|
|
return( -1 );
|
|
|
|
#ifdef DEBUG_IO
|
|
printf( "vips_image_pio_input: enabling partial input for %s\n",
|
|
image->filename );
|
|
#endif /*DEBUG_IO*/
|
|
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_SETBUF:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
/* Should have been written to.
|
|
*/
|
|
if( !image->data ) {
|
|
vips_error( "vips_image_pio_input",
|
|
"%s", _( "no image data" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Should be no generate functions now.
|
|
*/
|
|
image->start_fn = NULL;
|
|
image->generate_fn = NULL;
|
|
image->stop_fn = NULL;
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_PARTIAL:
|
|
/* Should have had generate functions attached.
|
|
*/
|
|
if( !image->generate_fn ) {
|
|
vips_error( "vips_image_pio_input",
|
|
"%s", _( "no image data" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_MMAPIN:
|
|
case VIPS_IMAGE_MMAPINRW:
|
|
case VIPS_IMAGE_OPENIN:
|
|
break;
|
|
|
|
case VIPS_IMAGE_OPENOUT:
|
|
|
|
/* Free any resources the image holds and reset to a base
|
|
* state.
|
|
*/
|
|
if( vips_image_rewind_output( image ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
default:
|
|
vips_error( "vips_image_pio_input",
|
|
"%s", _( "image not readable" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_image_pio_output:
|
|
* @image: image to check
|
|
*
|
|
* Check that an image is writeable with vips_image_generate(). If it isn't,
|
|
* try to transform the image so that vips_image_generate() can work.
|
|
*
|
|
* See also: vips_image_pio_input().
|
|
*
|
|
* Returns: 0 on succeess, or -1 on error.
|
|
*/
|
|
int
|
|
vips_image_pio_output( VipsImage *image )
|
|
{
|
|
#ifdef DEBUG_IO
|
|
printf( "vips_image_pio_output: enabling partial output for %s\n",
|
|
image->filename );
|
|
#endif /*DEBUG_IO*/
|
|
|
|
switch( image->dtype ) {
|
|
case VIPS_IMAGE_SETBUF:
|
|
if( image->data ) {
|
|
vips_error( "vips_image_pio_output",
|
|
"%s", _( "image already written" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_PARTIAL:
|
|
if( image->generate_fn ) {
|
|
vips_error( "vips_image_pio_output",
|
|
"%s", _( "image already written" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
break;
|
|
|
|
case VIPS_IMAGE_OPENOUT:
|
|
case VIPS_IMAGE_SETBUF_FOREIGN:
|
|
break;
|
|
|
|
default:
|
|
vips_error( "vips_image_pio_output",
|
|
"%s", _( "image not writeable" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/**
|
|
* vips_band_format_isint:
|
|
* @format: format to test
|
|
*
|
|
* Return %TRUE if @format is one of the integer types.
|
|
*/
|
|
gboolean
|
|
vips_band_format_isint( VipsBandFormat format )
|
|
{
|
|
switch( format ) {
|
|
case VIPS_FORMAT_UCHAR:
|
|
case VIPS_FORMAT_CHAR:
|
|
case VIPS_FORMAT_USHORT:
|
|
case VIPS_FORMAT_SHORT:
|
|
case VIPS_FORMAT_UINT:
|
|
case VIPS_FORMAT_INT:
|
|
return( TRUE );
|
|
|
|
case VIPS_FORMAT_FLOAT:
|
|
case VIPS_FORMAT_DOUBLE:
|
|
case VIPS_FORMAT_COMPLEX:
|
|
case VIPS_FORMAT_DPCOMPLEX:
|
|
return( FALSE );
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return( FALSE );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vips_band_format_isuint:
|
|
* @format: format to test
|
|
*
|
|
* Return %TRUE if @format is one of the unsigned integer types.
|
|
*/
|
|
gboolean
|
|
vips_band_format_isuint( VipsBandFormat format )
|
|
{
|
|
switch( format ) {
|
|
case VIPS_FORMAT_UCHAR:
|
|
case VIPS_FORMAT_USHORT:
|
|
case VIPS_FORMAT_UINT:
|
|
return( TRUE );
|
|
|
|
case VIPS_FORMAT_INT:
|
|
case VIPS_FORMAT_SHORT:
|
|
case VIPS_FORMAT_CHAR:
|
|
case VIPS_FORMAT_FLOAT:
|
|
case VIPS_FORMAT_DOUBLE:
|
|
case VIPS_FORMAT_COMPLEX:
|
|
case VIPS_FORMAT_DPCOMPLEX:
|
|
return( FALSE );
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return( FALSE );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vips_band_format_is8bit:
|
|
* @format: format to test
|
|
*
|
|
* Return %TRUE if @format is uchar or schar.
|
|
*/
|
|
gboolean
|
|
vips_band_format_is8bit( VipsBandFormat format )
|
|
{
|
|
switch( format ) {
|
|
case VIPS_FORMAT_UCHAR:
|
|
case VIPS_FORMAT_CHAR:
|
|
return( TRUE );
|
|
|
|
case VIPS_FORMAT_USHORT:
|
|
case VIPS_FORMAT_SHORT:
|
|
case VIPS_FORMAT_UINT:
|
|
case VIPS_FORMAT_INT:
|
|
case VIPS_FORMAT_FLOAT:
|
|
case VIPS_FORMAT_DOUBLE:
|
|
case VIPS_FORMAT_COMPLEX:
|
|
case VIPS_FORMAT_DPCOMPLEX:
|
|
return( FALSE );
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return( FALSE );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vips_band_format_isfloat:
|
|
* @format: format to test
|
|
*
|
|
* Return %TRUE if @format is one of the float types.
|
|
*/
|
|
gboolean
|
|
vips_band_format_isfloat( VipsBandFormat format )
|
|
{
|
|
switch( format ) {
|
|
case VIPS_FORMAT_FLOAT:
|
|
case VIPS_FORMAT_DOUBLE:
|
|
return( TRUE );
|
|
|
|
case VIPS_FORMAT_UCHAR:
|
|
case VIPS_FORMAT_CHAR:
|
|
case VIPS_FORMAT_USHORT:
|
|
case VIPS_FORMAT_SHORT:
|
|
case VIPS_FORMAT_UINT:
|
|
case VIPS_FORMAT_INT:
|
|
case VIPS_FORMAT_COMPLEX:
|
|
case VIPS_FORMAT_DPCOMPLEX:
|
|
return( FALSE );
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return( FALSE );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vips_band_format_iscomplex:
|
|
* @format: format to test
|
|
*
|
|
* Return %TRUE if @fmt is one of the complex types.
|
|
*/
|
|
gboolean
|
|
vips_band_format_iscomplex( VipsBandFormat format )
|
|
{
|
|
switch( format ) {
|
|
case VIPS_FORMAT_COMPLEX:
|
|
case VIPS_FORMAT_DPCOMPLEX:
|
|
return( TRUE );
|
|
|
|
case VIPS_FORMAT_UCHAR:
|
|
case VIPS_FORMAT_CHAR:
|
|
case VIPS_FORMAT_USHORT:
|
|
case VIPS_FORMAT_SHORT:
|
|
case VIPS_FORMAT_UINT:
|
|
case VIPS_FORMAT_INT:
|
|
case VIPS_FORMAT_FLOAT:
|
|
case VIPS_FORMAT_DOUBLE:
|
|
return( FALSE );
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return( FALSE );
|
|
}
|
|
}
|