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PIKApp/plug-ins/common/file-pnm.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* PNM reading and writing code Copyright (C) 1996 Erik Nygren
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*
* The pnm reading and writing code was written from scratch by Erik Nygren
* (nygren@mit.edu) based on the specifications in the man pages and
* does not contain any code from the netpbm or pbmplus distributions.
*
* 2006: pbm saving written by Martin K Collins (martin@mkcollins.org)
* 2015: pfm reading written by Tobias Ellinghaus (me@houz.org)
*/
#include "config.h"
#include <setjmp.h>
#include <stdlib.h>
#include <math.h>
#include <errno.h>
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#include "libpika/stdplugins-intl.h"
#define LOAD_PROC "file-pnm-load"
#define PNM_SAVE_PROC "file-pnm-save"
#define PBM_SAVE_PROC "file-pbm-save"
#define PGM_SAVE_PROC "file-pgm-save"
#define PPM_SAVE_PROC "file-ppm-save"
#define PAM_SAVE_PROC "file-pam-save"
#define PFM_SAVE_PROC "file-pfm-save"
#define PLUG_IN_BINARY "file-pnm"
#define PLUG_IN_ROLE "pika-file-pnm"
/* Declare local data types
*/
typedef enum
{
FILE_TYPE_PNM,
FILE_TYPE_PBM,
FILE_TYPE_PGM,
FILE_TYPE_PPM,
FILE_TYPE_PAM,
FILE_TYPE_PFM
} FileType;
typedef struct _PNMScanner PNMScanner;
typedef struct _PNMInfo PNMInfo;
typedef struct _PNMRowInfo PNMRowInfo;
typedef void (* PNMLoaderFunc) (PNMScanner *scanner,
PNMInfo *info,
GeglBuffer *buffer);
typedef gboolean (* PNMSaverowFunc) (PNMRowInfo *info,
guchar *data,
GError **error);
struct _PNMScanner
{
GInputStream *input; /* The input stream of the file being read */
gchar cur; /* The current character in the input stream */
gint eof; /* Have we reached end of file? */
gchar *inbuf; /* Input buffer - initially 0 */
gint inbufsize; /* Size of input buffer */
gint inbufvalidsize; /* Size of input buffer with valid data */
gint inbufpos; /* Position in input buffer */
};
struct _PNMInfo
{
gint xres, yres; /* The size of the image */
gboolean float_format; /* Whether it is a floating point format */
gint maxval; /* For integer format image files, the max value
* which we need to normalize to */
gfloat scale_factor; /* PFM files have a scale factor */
gint np; /* Number of image planes (0 for pbm) */
gboolean asciibody; /* 1 if ascii body, 0 if raw body */
jmp_buf jmpbuf; /* Where to jump to on an error loading */
PNMLoaderFunc loader; /* Routine to use to load the pnm body */
};
/* Contains the information needed to write out PNM rows */
struct _PNMRowInfo
{
GOutputStream *output; /* Output stream */
gchar *rowbuf; /* Buffer for writing out rows */
gint xres; /* X resolution */
gint np; /* Number of planes */
gint bpc; /* Bytes per color */
guchar *red; /* Colormap red */
guchar *grn; /* Colormap green */
guchar *blu; /* Colormap blue */
guchar *alpha; /* Colormap alpha (PAM only) */
gboolean zero_is_black; /* index zero is black (PBM only) */
};
#define BUFLEN 512 /* The input buffer size for data returned
* from the scanner. Note that lines
* aren't allowed to be over 256 characters
* by the spec anyways so this shouldn't
* be an issue. */
typedef struct _Pnm Pnm;
typedef struct _PnmClass PnmClass;
struct _Pnm
{
PikaPlugIn parent_instance;
};
struct _PnmClass
{
PikaPlugInClass parent_class;
};
#define PNM_TYPE (pnm_get_type ())
Updated with upstream update
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#define PNM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PNM_TYPE, Pnm))
Initial checkin of Pika from heckimp
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GType pnm_get_type (void) G_GNUC_CONST;
Updated with upstream update
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static GList * pnm_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * pnm_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * pnm_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data);
static PikaValueArray * pnm_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
PikaMetadata *metadata,
PikaProcedureConfig *config,
gpointer run_data);
static PikaImage * load_image (GFile *file,
GError **error);
static gint save_image (GFile *file,
PikaImage *image,
PikaDrawable *drawable,
FileType file_type,
GObject *config,
GError **error);
static gboolean save_dialog (PikaProcedure *procedure,
GObject *config,
PikaImage *image);
static void process_pam_header (PNMScanner *scan,
PNMInfo *info);
static void pnm_load_ascii (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static void pnm_load_raw (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static void pnm_load_rawpbm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static void pnm_load_rawpfm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static void create_pam_header (const gchar **header_string,
PNMRowInfo *rowinfo,
PNMSaverowFunc *saverow,
PikaImageType drawable_type,
GeglBuffer *buffer,
const Babl **format,
gint *rowbufsize,
gint *np,
gchar *comment);
static gboolean pnmsaverow_ascii (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_raw (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_raw_pbm (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_ascii_pbm (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_ascii_indexed (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_raw_indexed (PNMRowInfo *ri,
guchar *data,
GError **error);
static PNMScanner * pnmscanner_create (GInputStream *input);
static void pnmscanner_destroy (PNMScanner *s);
static void pnmscanner_createbuffer (PNMScanner *s,
gint bufsize);
static void pnmscanner_getchar (PNMScanner *s);
static void pnmscanner_eatwhitespace (PNMScanner *s);
static void pnmscanner_eatinnerspace (PNMScanner *s);
static void pnmscanner_gettoken (PNMScanner *s,
gchar *buf,
gint bufsize);
static void pnmscanner_getsmalltoken (PNMScanner *s,
gchar *buf);
static void pnmscanner_getheaderline (PNMScanner *s,
gchar *buf,
gint bufsize);
Initial checkin of Pika from heckimp
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#define pnmscanner_eof(s) ((s)->eof)
#define pnmscanner_input(s) ((s)->input)
/* Checks for a fatal error */
#define CHECK_FOR_ERROR(predicate, jmpbuf, ...) \
if ((predicate)) \
{ g_message (__VA_ARGS__); longjmp ((jmpbuf), 1); }
G_DEFINE_TYPE (Pnm, pnm, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (PNM_TYPE)
DEFINE_STD_SET_I18N
static const struct
{
gchar name;
gint np;
gint asciibody;
gint maxval;
PNMLoaderFunc loader;
} pnm_types[] =
{
{ '1', 0, 1, 1, pnm_load_ascii }, /* ASCII PBM */
{ '2', 1, 1, 255, pnm_load_ascii }, /* ASCII PGM */
{ '3', 3, 1, 255, pnm_load_ascii }, /* ASCII PPM */
{ '4', 0, 0, 1, pnm_load_rawpbm }, /* RAW PBM */
{ '5', 1, 0, 255, pnm_load_raw }, /* RAW PGM */
{ '6', 3, 0, 255, pnm_load_raw }, /* RAW PPM */
{ '7', 4, 0, 65535, pnm_load_raw }, /* RAW PAM */
{ 'F', 3, 0, 0, pnm_load_rawpfm }, /* RAW PFM (color) */
{ 'f', 1, 0, 0, pnm_load_rawpfm }, /* RAW PFM (grayscale) */
{ 0 , 0, 0, 0, NULL }
};
static void
pnm_class_init (PnmClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = pnm_query_procedures;
plug_in_class->create_procedure = pnm_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
pnm_init (Pnm *pnm)
{
}
static GList *
pnm_query_procedures (PikaPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_PROC));
list = g_list_append (list, g_strdup (PNM_SAVE_PROC));
list = g_list_append (list, g_strdup (PBM_SAVE_PROC));
list = g_list_append (list, g_strdup (PGM_SAVE_PROC));
list = g_list_append (list, g_strdup (PPM_SAVE_PROC));
list = g_list_append (list, g_strdup (PAM_SAVE_PROC));
list = g_list_append (list, g_strdup (PFM_SAVE_PROC));
return list;
}
static PikaProcedure *
pnm_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = pika_load_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
pnm_load, NULL, NULL);
pika_procedure_set_menu_label (procedure, _("PNM Image"));
pika_procedure_set_documentation (procedure,
_("Loads files in the PNM file format"),
_("This plug-in loads files in the "
"various Netpbm portable file formats."),
name);
pika_procedure_set_attribution (procedure,
"Erik Nygren",
"Erik Nygren",
"1996");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-portable-anymap");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"pnm,ppm,pgm,pbm,pfm,pam");
pika_file_procedure_set_magics (PIKA_FILE_PROCEDURE (procedure),
"0,string,P1,0,string,P2,0,string,P3,"
"0,string,P4,0,string,P5,0,string,P6,"
"0,string,P7,0,string,PF,0,string,Pf");
}
else if (! strcmp (name, PNM_SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
Updated with upstream update
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FALSE, pnm_save,
Initial checkin of Pika from heckimp
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GINT_TO_POINTER (FILE_TYPE_PNM),
NULL);
pika_procedure_set_image_types (procedure, "RGB, GRAY, INDEXED");
pika_procedure_set_menu_label (procedure, _("PNM image"));
pika_file_procedure_set_format_name (PIKA_FILE_PROCEDURE (procedure),
_("PNM"));
pika_procedure_set_documentation (procedure,
_("Exports files in the PNM file format"),
_("PNM export handles all image types "
"without transparency."),
name);
pika_procedure_set_attribution (procedure,
"Erik Nygren",
"Erik Nygren",
"1996");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-portable-anymap");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"pnm");
PIKA_PROC_ARG_INT (procedure, "raw",
_("Data formatting"),
_("TRUE for raw output, FALSE for ascii output"),
0, 1, 1,
G_PARAM_READWRITE);
}
else if (! strcmp (name, PBM_SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
Updated with upstream update
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FALSE, pnm_save,
Initial checkin of Pika from heckimp
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GINT_TO_POINTER (FILE_TYPE_PBM),
NULL);
pika_procedure_set_image_types (procedure, "RGB, GRAY, INDEXED");
pika_file_procedure_set_format_name (PIKA_FILE_PROCEDURE (procedure),
_("PBM"));
pika_procedure_set_menu_label (procedure, _("PBM image"));
pika_procedure_set_documentation (procedure,
_("Exports files in the PBM file format"),
_("PBM exporting produces mono images "
"without transparency."),
name);
pika_procedure_set_attribution (procedure,
"Erik Nygren",
"Erik Nygren",
"1996");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-portable-bitmap");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"pbm");
PIKA_PROC_ARG_INT (procedure, "raw",
_("Data formatting"),
_("TRUE for raw output, FALSE for ascii output"),
0, 1, 1,
G_PARAM_READWRITE);
}
else if (! strcmp (name, PGM_SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
Updated with upstream update
2023-10-30 23:55:30 +01:00
FALSE, pnm_save,
Initial checkin of Pika from heckimp
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GINT_TO_POINTER (FILE_TYPE_PGM),
NULL);
pika_procedure_set_image_types (procedure, "RGB, GRAY, INDEXED");
pika_procedure_set_menu_label (procedure, _("PGM image"));
pika_file_procedure_set_format_name (PIKA_FILE_PROCEDURE (procedure),
_("PGM"));
pika_procedure_set_documentation (procedure,
_("Exports files in the PGM file format"),
_("PGM exporting produces grayscale "
"images without transparency."),
name);
pika_procedure_set_attribution (procedure,
"Erik Nygren",
"Erik Nygren",
"1996");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-portable-graymap");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"pgm");
PIKA_PROC_ARG_INT (procedure, "raw",
_("Data formatting"),
_("TRUE for raw output, FALSE for ascii output"),
0, 1, 1,
G_PARAM_READWRITE);
}
else if (! strcmp (name, PPM_SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
Updated with upstream update
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FALSE, pnm_save,
Initial checkin of Pika from heckimp
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GINT_TO_POINTER (FILE_TYPE_PPM),
NULL);
pika_procedure_set_image_types (procedure, "RGB, GRAY, INDEXED");
pika_procedure_set_menu_label (procedure, _("PPM image"));
pika_file_procedure_set_format_name (PIKA_FILE_PROCEDURE (procedure),
_("PPM"));
pika_procedure_set_documentation (procedure,
_("Exports files in the PPM file format"),
_("PPM export handles RGB images "
"without transparency."),
name);
pika_procedure_set_attribution (procedure,
"Erik Nygren",
"Erik Nygren",
"1996");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-portable-pixmap");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"ppm");
PIKA_PROC_ARG_INT (procedure, "raw",
"Data formatting",
_("TRUE for raw output, FALSE for ascii output"),
0, 1, 1,
G_PARAM_READWRITE);
}
else if (! strcmp (name, PAM_SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
Updated with upstream update
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FALSE, pnm_save,
Initial checkin of Pika from heckimp
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GINT_TO_POINTER (FILE_TYPE_PAM),
NULL);
pika_procedure_set_image_types (procedure, "RGB*, GRAY*, INDEXED*");
pika_procedure_set_menu_label (procedure, _("PAM image"));
pika_procedure_set_documentation (procedure,
_("Exports files in the PAM file format"),
_("PAM export handles RGB images "
"with or without transparency."),
name);
pika_procedure_set_attribution (procedure,
"Jörg Walter",
"Jörg Walter",
"2009");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-portable-arbitrarymap");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"pam");
}
else if (! strcmp (name, PFM_SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
Updated with upstream update
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FALSE, pnm_save,
Initial checkin of Pika from heckimp
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GINT_TO_POINTER (FILE_TYPE_PFM),
NULL);
pika_procedure_set_image_types (procedure, "RGB, GRAY, INDEXED");
pika_procedure_set_menu_label (procedure, _("PFM image"));
pika_procedure_set_documentation (procedure,
_("Exports files in the PFM file format"),
_("PFM export handles all images "
"without transparency."),
name);
pika_procedure_set_attribution (procedure,
"Mukund Sivaraman",
"Mukund Sivaraman",
"2015");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-portable-floatmap");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"pfm");
}
return procedure;
}
static PikaValueArray *
Updated with upstream update
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pnm_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data)
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{
PikaValueArray *return_vals;
PikaImage *image;
GError *error = NULL;
gegl_init (NULL, NULL);
image = load_image (file, &error);
if (! image)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
return_vals = pika_procedure_new_return_values (procedure,
PIKA_PDB_SUCCESS,
NULL);
PIKA_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static PikaValueArray *
pnm_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
Updated with upstream update
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PikaMetadata *metadata,
PikaProcedureConfig *config,
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gpointer run_data)
{
Updated with upstream update
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FileType file_type = GPOINTER_TO_INT (run_data);
PikaPDBStatusType status = PIKA_PDB_SUCCESS;
PikaExportReturn export = PIKA_EXPORT_CANCEL;
const gchar *format_name = NULL;
GError *error = NULL;
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gegl_init (NULL, NULL);
switch (run_mode)
{
case PIKA_RUN_INTERACTIVE:
case PIKA_RUN_WITH_LAST_VALS:
pika_ui_init (PLUG_IN_BINARY);
switch (file_type)
{
case FILE_TYPE_PNM:
format_name = "PNM";
export = pika_export_image (&image, &n_drawables, &drawables, "PNM",
PIKA_EXPORT_CAN_HANDLE_RGB |
PIKA_EXPORT_CAN_HANDLE_GRAY |
PIKA_EXPORT_CAN_HANDLE_INDEXED);
break;
case FILE_TYPE_PBM:
format_name = "PBM";
export = pika_export_image (&image, &n_drawables, &drawables, "PBM",
PIKA_EXPORT_CAN_HANDLE_BITMAP);
break;
case FILE_TYPE_PGM:
format_name = "PGM";
export = pika_export_image (&image, &n_drawables, &drawables, "PGM",
PIKA_EXPORT_CAN_HANDLE_GRAY);
break;
case FILE_TYPE_PPM:
format_name = "PPM";
export = pika_export_image (&image, &n_drawables, &drawables, "PPM",
PIKA_EXPORT_CAN_HANDLE_RGB |
PIKA_EXPORT_CAN_HANDLE_INDEXED);
break;
case FILE_TYPE_PAM:
format_name = "PAM";
export = pika_export_image (&image, &n_drawables, &drawables, "PAM",
PIKA_EXPORT_CAN_HANDLE_RGB |
PIKA_EXPORT_CAN_HANDLE_GRAY |
PIKA_EXPORT_CAN_HANDLE_ALPHA |
PIKA_EXPORT_CAN_HANDLE_INDEXED);
break;
case FILE_TYPE_PFM:
format_name = "PFM";
export = pika_export_image (&image, &n_drawables, &drawables, "PFM",
PIKA_EXPORT_CAN_HANDLE_RGB |
PIKA_EXPORT_CAN_HANDLE_GRAY);
break;
}
if (export == PIKA_EXPORT_CANCEL)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CANCEL,
NULL);
break;
default:
break;
}
if (n_drawables != 1)
{
g_set_error (&error, G_FILE_ERROR, 0,
_("%s format does not support multiple layers."),
format_name);
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CALLING_ERROR,
error);
}
if (file_type != FILE_TYPE_PFM &&
file_type != FILE_TYPE_PAM &&
run_mode == PIKA_RUN_INTERACTIVE)
{
if (! save_dialog (procedure, G_OBJECT (config), image))
status = PIKA_PDB_CANCEL;
}
if (status == PIKA_PDB_SUCCESS)
{
if (! save_image (file, image, drawables[0], file_type, G_OBJECT (config),
&error))
{
status = PIKA_PDB_EXECUTION_ERROR;
}
}
if (export == PIKA_EXPORT_EXPORT)
{
pika_image_delete (image);
g_free (drawables);
}
return pika_procedure_new_return_values (procedure, status, error);
}
static PikaImage *
load_image (GFile *file,
GError **error)
{
GInputStream *input;
GeglBuffer *buffer;
PikaImage * volatile image = NULL;
PikaLayer *layer;
char buf[BUFLEN + 4]; /* buffer for random things like scanning */
PNMInfo *pnminfo;
PNMScanner *volatile scan;
gint ctr;
PikaPrecision precision;
gboolean is_pam = FALSE;
PikaImageType layer_type;
pika_progress_init_printf (_("Opening '%s'"),
g_file_get_parse_name (file));
input = G_INPUT_STREAM (g_file_read (file, NULL, error));
if (! input)
return NULL;
/* allocate the necessary structures */
pnminfo = g_new (PNMInfo, 1);
scan = NULL;
/* set error handling */
if (setjmp (pnminfo->jmpbuf))
{
/* If we get here, we had a problem reading the file */
if (scan)
pnmscanner_destroy (scan);
g_object_unref (input);
g_free (pnminfo);
if (image)
pika_image_delete (image);
return NULL;
}
if (! (scan = pnmscanner_create (input)))
longjmp (pnminfo->jmpbuf, 1);
/* Get magic number */
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
CHECK_FOR_ERROR ((buf[0] != 'P' || buf[2]), pnminfo->jmpbuf,
_("Invalid file."));
/* Look up magic number to see what type of PNM this is */
for (ctr = 0; pnm_types[ctr].name; ctr++)
if (buf[1] == pnm_types[ctr].name)
{
pnminfo->np = pnm_types[ctr].np;
pnminfo->asciibody = pnm_types[ctr].asciibody;
pnminfo->float_format = g_ascii_tolower (pnm_types[ctr].name) == 'f';
pnminfo->maxval = pnm_types[ctr].maxval;
pnminfo->loader = pnm_types[ctr].loader;
if (pnm_types[ctr].name == '7')
is_pam = TRUE;
}
if (! pnminfo->loader)
{
g_message (_("File not in a supported format."));
longjmp (pnminfo->jmpbuf, 1);
}
if (is_pam)
{
process_pam_header (scan, pnminfo);
}
else
{
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
pnminfo->xres = g_ascii_isdigit(*buf) ? atoi (buf) : 0;
CHECK_FOR_ERROR (pnminfo->xres <= 0, pnminfo->jmpbuf,
_("Invalid X resolution."));
CHECK_FOR_ERROR (pnminfo->xres > PIKA_MAX_IMAGE_SIZE, pnminfo->jmpbuf,
_("Image width is larger than PIKA can handle."));
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
pnminfo->yres = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
CHECK_FOR_ERROR (pnminfo->yres <= 0, pnminfo->jmpbuf,
_("Invalid Y resolution."));
CHECK_FOR_ERROR (pnminfo->yres > PIKA_MAX_IMAGE_SIZE, pnminfo->jmpbuf,
_("Image height is larger than PIKA can handle."));
}
if (pnminfo->float_format)
{
gchar *endptr = NULL;
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
pnminfo->scale_factor = g_ascii_strtod (buf, &endptr);
CHECK_FOR_ERROR (endptr == NULL || *endptr != 0 || errno == ERANGE,
pnminfo->jmpbuf, _("Bogus scale factor."));
CHECK_FOR_ERROR (! isnormal (pnminfo->scale_factor),
pnminfo->jmpbuf, _("Unsupported scale factor."));
precision = PIKA_PRECISION_FLOAT_LINEAR;
}
else if (pnminfo->np != 0) /* pbm's don't have a maxval field */
{
if (! is_pam)
{
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
pnminfo->maxval = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
}
CHECK_FOR_ERROR (((pnminfo->maxval <= 0) || (pnminfo->maxval > 65535)),
pnminfo->jmpbuf, _("Unsupported maximum value."));
if (pnminfo->maxval < 256)
{
precision = PIKA_PRECISION_U8_NON_LINEAR;
}
else
{
precision = PIKA_PRECISION_U16_NON_LINEAR;
}
}
else
{
precision = PIKA_PRECISION_U8_NON_LINEAR;
}
/* Create a new image of the proper size and associate the filename
* with it.
*/
image = pika_image_new_with_precision (pnminfo->xres, pnminfo->yres,
(pnminfo->np >= 3) ? PIKA_RGB : PIKA_GRAY,
precision);
switch (pnminfo->np)
{
case 0:
case 1:
layer_type = PIKA_GRAY_IMAGE;
break;
case 2:
layer_type = PIKA_GRAYA_IMAGE;
break;
case 3:
layer_type = PIKA_RGB_IMAGE;
break;
case 4:
layer_type = PIKA_RGBA_IMAGE;
break;
default:
layer_type = PIKA_GRAY_IMAGE;
}
layer = pika_layer_new (image, _("Background"), pnminfo->xres, pnminfo->yres,
layer_type, 100,
pika_image_get_default_new_layer_mode (image));
pika_image_insert_layer (image, layer, NULL, 0);
buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (layer));
pnminfo->loader (scan, pnminfo, buffer);
/* Destroy the scanner */
pnmscanner_destroy (scan);
g_object_unref (buffer);
g_free (pnminfo);
g_object_unref (input);
return image;
}
/* Code referenced from Jörg Walter */
static void
process_pam_header (PNMScanner *scan,
PNMInfo *pnminfo)
{
char buf[BUFLEN + 4];
gboolean is_unsupported_tupltype = FALSE;
while (! scan->eof)
{
pnmscanner_getheaderline (scan, buf, BUFLEN);
if (! strcmp (buf, "WIDTH"))
{
pnmscanner_gettoken (scan, buf, BUFLEN);
pnminfo->xres = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
}
else if (! strcmp (buf, "HEIGHT"))
{
pnmscanner_gettoken (scan, buf, BUFLEN);
pnminfo->yres = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
}
else if (! strcmp (buf, "DEPTH"))
{
pnmscanner_gettoken (scan, buf, BUFLEN);
pnminfo->np = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
}
else if (! strcmp (buf, "MAXVAL"))
{
pnmscanner_gettoken (scan, buf, BUFLEN);
pnminfo->maxval = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
}
else if (! strcmp (buf, "TUPLTYPE"))
{
pnmscanner_gettoken (scan, buf, BUFLEN);
/* PAM files may have custom tupltypes;
* however, these are the only 'officially' defined
* ones */
if (strcmp (buf, "BLACKANDWHITE") &&
strcmp (buf, "BLACKANDWHITE_ALPHA") &&
strcmp (buf, "GRAYSCALE") &&
strcmp (buf, "GRAYSCALE_ALPHA") &&
strcmp (buf, "RGB") &&
strcmp (buf, "RGB_ALPHA"))
{
is_unsupported_tupltype = TRUE;
}
}
else if (! strcmp (buf, "ENDHDR"))
{
break;
}
else
{
/* skip unknown headers but recognize xv's thumbnail format */
CHECK_FOR_ERROR (g_ascii_isdigit (*buf), pnminfo->jmpbuf,
Update upstream
2023-12-02 20:03:24 +01:00
_("PAM: Unsupported unofficial PNM variant."));
Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
}
}
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("PAM: Premature end of file."));
CHECK_FOR_ERROR (pnminfo->xres > PIKA_MAX_IMAGE_SIZE, pnminfo->jmpbuf,
_("Image width is larger than PIKA can handle."));
CHECK_FOR_ERROR (pnminfo->xres <= 0, pnminfo->jmpbuf,
_("PAM: Invalid X resolution."));
CHECK_FOR_ERROR (pnminfo->yres <= 0, pnminfo->jmpbuf,
_("PAM: Invalid Y resolution."));
CHECK_FOR_ERROR ((pnminfo->maxval <= 0), pnminfo->jmpbuf,
_("PAM: Invalid maximum value."));
CHECK_FOR_ERROR ((pnminfo->np <= 0), pnminfo->jmpbuf,
_("PAM: Invalid depth."));
CHECK_FOR_ERROR (is_unsupported_tupltype, pnminfo->jmpbuf,
_("PAM: Unsupported tupltype."));
}
static void
pnm_load_ascii (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
gint bpc;
guchar *data, *d;
gushort *s;
gint x, y, i, b;
gint start, end, scanlines;
gint np;
gchar buf[BUFLEN];
gboolean aborted = FALSE;
np = (info->np) ? (info->np) : 1;
if (info->maxval > 255)
bpc = 2;
else
bpc = 1;
/* No overflow as long as pika_tile_height() < 1365 = 2^(31 - 18) / 6 */
data = g_new (guchar, pika_tile_height () * info->xres * np * bpc);
/* Buffer reads to increase performance */
pnmscanner_createbuffer (scan, 4096);
for (y = 0; y < info->yres; y += scanlines)
{
start = y;
end = y + pika_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
s = (gushort *)d;
for (i = 0; i < scanlines; i++)
for (x = 0; x < info->xres; x++)
{
for (b = 0; b < np; b++)
{
if (aborted)
{
d[b] = 0;
continue;
}
/* Truncated files will just have all 0's
at the end of the images */
if (pnmscanner_eof (scan))
{
g_message (_("Premature end of file."));
aborted = TRUE;
d[b] = 0;
continue;
}
if (info->np)
pnmscanner_gettoken (scan, buf, BUFLEN);
else
pnmscanner_getsmalltoken (scan, buf);
if (info->maxval == 1)
{
if (info->np)
d[b] = (*buf == '0') ? 0x00 : 0xff;
else
d[b] = (*buf == '0') ? 0xff : 0x00; /* invert for PBM */
}
else if (bpc > 1)
{
s[b] = (65535.0 * (((gdouble) (g_ascii_isdigit (*buf) ?
atoi (buf) : 0))
/ (gdouble) (info->maxval)));
}
else
{
d[b] = (255.0 * (((gdouble) (g_ascii_isdigit (*buf) ?
atoi (buf) : 0))
/ (gdouble) (info->maxval)));
}
}
if (bpc > 1)
{
s += np;
}
else
{
d += np;
}
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y, info->xres, scanlines), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
pika_progress_update ((double) y / (double) info->yres);
}
g_free (data);
pika_progress_update (1.0);
}
static void
pnm_load_raw (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
GInputStream *input;
gint bpc;
guchar *data, *d;
gushort *s;
gint x, y, i;
gint start, end, scanlines;
if (info->maxval > 255)
bpc = 2;
else
bpc = 1;
/* No overflow as long as pika_tile_height() < 1365 = 2^(31 - 18) / 6 */
data = g_new (guchar, pika_tile_height () * info->xres * info->np * bpc);
input = pnmscanner_input (scan);
for (y = 0; y < info->yres; y += scanlines)
{
start = y;
end = y + pika_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
s = (gushort *)data;
for (i = 0; i < scanlines; i++)
{
gsize bytes_read;
GError *error = NULL;
if (g_input_stream_read_all (input, d, info->xres * info->np * bpc,
&bytes_read, NULL, &error))
{
CHECK_FOR_ERROR (info->xres * info->np * bpc != bytes_read,
info->jmpbuf,
_("Premature end of file."));
}
else
{
CHECK_FOR_ERROR (FALSE, info->jmpbuf, "%s", error->message);
}
if (bpc > 1)
{
for (x = 0; x < info->xres * info->np; x++)
{
int v;
v = *d++ << 8;
v += *d++;
s[x] = MIN (v, info->maxval); /* guard against overflow */
s[x] = 65535.0 * (gdouble) v / (gdouble) info->maxval;
}
s += info->xres * info->np;
}
else
{
if (info->maxval != 255) /* Normalize if needed */
{
for (x = 0; x < info->xres * info->np; x++)
{
d[x] = MIN (d[x], info->maxval); /* guard against overflow */
d[x] = 255.0 * (gdouble) d[x] / (gdouble) info->maxval;
}
}
d += info->xres * info->np;
}
}
gegl_buffer_set (buffer,
GEGL_RECTANGLE (0, y, info->xres, scanlines), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
pika_progress_update ((double) y / (double) info->yres);
}
g_free (data);
pika_progress_update (1.0);
}
static void
pnm_load_rawpbm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
GInputStream *input;
guchar *buf;
guchar curbyte;
guchar *data, *d;
gint x, y, i;
gint start, end, scanlines;
gint rowlen, bufpos;
input = pnmscanner_input (scan);
rowlen = (int)ceil ((double)(info->xres)/8.0);
data = g_new (guchar, pika_tile_height () * info->xres);
buf = g_new (guchar, rowlen);
for (y = 0; y < info->yres; y += scanlines)
{
start = y;
end = y + pika_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
for (i = 0; i < scanlines; i++)
{
gsize bytes_read;
GError *error = NULL;
if (g_input_stream_read_all (input, buf, rowlen,
&bytes_read, NULL, &error))
{
CHECK_FOR_ERROR (rowlen != bytes_read,
info->jmpbuf,
_("Premature end of file."));
}
else
{
CHECK_FOR_ERROR (FALSE, info->jmpbuf, "%s", error->message);
}
bufpos = 0;
curbyte = buf[0];
for (x = 0; x < info->xres; x++)
{
if ((x % 8) == 0)
curbyte = buf[bufpos++];
d[x] = (curbyte & 0x80) ? 0x00 : 0xff;
curbyte <<= 1;
}
d += info->xres;
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y, info->xres, scanlines), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
pika_progress_update ((double) y / (double) info->yres);
}
g_free (buf);
g_free (data);
pika_progress_update (1.0);
}
static void
pnm_load_rawpfm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
GInputStream *input;
gfloat *data;
gint x, y;
gboolean swap_byte_order;
swap_byte_order =
(info->scale_factor >= 0.0) ^ (G_BYTE_ORDER == G_BIG_ENDIAN);
data = g_new (gfloat, info->xres * info->np);
input = pnmscanner_input (scan);
for (y = info->yres - 1; y >= 0; y--)
{
gsize bytes_read;
GError *error = NULL;
if (g_input_stream_read_all (input, data,
info->xres * info->np * sizeof (float),
&bytes_read, NULL, &error))
{
CHECK_FOR_ERROR
(info->xres * info->np * sizeof (float) != bytes_read,
info->jmpbuf, _("Premature end of file."));
}
else
{
CHECK_FOR_ERROR (FALSE, info->jmpbuf, "%s", error->message);
}
for (x = 0; x < info->xres * info->np; x++)
{
if (swap_byte_order)
{
union { gfloat f; guint32 i; } v;
v.f = data[x];
v.i = GUINT32_SWAP_LE_BE (v.i);
data[x] = v.f;
}
/* let's see if this is what people want, the PFM specs are
* a little vague about what the scale factor should be used
* for
*/
data[x] *= fabsf (info->scale_factor);
/* Keep values smaller than zero. That is in line with what
* the TIFF loader does. If the user doesn't want the
* negative numbers they have to get rid of them afterwards
*/
/* data[x] = fmaxf (0.0f, fminf (FLT_MAX, data[x])); */
}
gegl_buffer_set (buffer,
GEGL_RECTANGLE (0, y, info->xres, 1), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
if (y % 32 == 0)
pika_progress_update ((double) (info->yres - y) / (double) info->yres);
}
g_free (data);
pika_progress_update (1.0);
}
static gboolean
output_write (GOutputStream *output,
gconstpointer buffer,
gsize count,
GError **error)
{
return g_output_stream_write_all (output, buffer, count, NULL, NULL, error);
}
static void
create_pam_header (const gchar **header_string,
PNMRowInfo *rowinfo,
PNMSaverowFunc *saverow,
PikaImageType drawable_type,
GeglBuffer *buffer,
const Babl **format,
gint *rowbufsize,
gint *np,
gchar *comment)
{
gint maxval = 255;
gint xres = gegl_buffer_get_width (buffer);
gint yres = gegl_buffer_get_height (buffer);
gchar *tupltype = NULL;
comment = g_strdup_printf ("# Created by PIKA version %s PNM plug-in",
PIKA_VERSION);
*saverow = pnmsaverow_raw;
if (rowinfo->bpc == 2)
maxval = 65535;
switch (drawable_type)
{
case PIKA_GRAY_IMAGE:
tupltype = "GRAYSCALE";
*np = 1;
if (rowinfo->bpc == 1)
{
*format = babl_format ("Y' u8");
*rowbufsize = xres;
}
else
{
*format = babl_format ("Y' u16");
*rowbufsize = xres * 2;
}
break;
case PIKA_GRAYA_IMAGE:
tupltype = "GRAYSCALE_ALPHA";
*np = 2;
if (rowinfo->bpc == 1)
{
*format = babl_format ("Y'A u8");
*rowbufsize = xres * 2;
}
else
{
*format = babl_format ("Y'A u16");
*rowbufsize = xres * 4;
}
break;
case PIKA_RGB_IMAGE:
tupltype = "RGB";
*np = 3;
if (rowinfo->bpc == 1)
{
*format = babl_format ("R'G'B' u8");
*rowbufsize = xres * 3;
}
else
{
*format = babl_format ("R'G'B' u16");
*rowbufsize = xres * 6;
}
break;
case PIKA_RGBA_IMAGE:
tupltype = "RGB_ALPHA";
*np = 4;
if (rowinfo->bpc == 1)
{
*format = babl_format ("R'G'B'A u8");
*rowbufsize = xres * 4;
}
else
{
*format = babl_format ("R'G'B'A u16");
*rowbufsize = xres * 8;
}
break;
case PIKA_INDEXED_IMAGE:
tupltype = "RGB";
*np = 3;
*format = babl_format ("R'G'B' u8");
*rowbufsize = xres * 3;
break;
case PIKA_INDEXEDA_IMAGE:
tupltype = "RGB_ALPHA";
*np = 4;
*format = babl_format ("R'G'B'A u8");
*rowbufsize = xres * 4;
break;
}
*header_string = g_strdup_printf ("P7\n%s\nWIDTH %d\nHEIGHT %d\nDEPTH %d\n"
"MAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
comment, xres, yres, *np, maxval, tupltype);
if (comment)
g_free (comment);
}
/* Writes out mono raw rows */
static gboolean
pnmsaverow_raw_pbm (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint b, p = 0;
gchar *rbcur = ri->rowbuf;
gint32 len = (gint) ceil ((gdouble) (ri->xres) / 8.0);
for (b = 0; b < len; b++) /* each output byte */
{
gint i;
rbcur[b] = 0;
for (i = 0; i < 8; i++) /* each bit in this byte */
{
if (p >= ri->xres)
break;
if (data[p] != ri->zero_is_black)
rbcur[b] |= (char) (1 << (7 - i));
p++;
}
}
return output_write (ri->output, ri->rowbuf, len, error);
}
/* Writes out mono ascii rows */
static gboolean
pnmsaverow_ascii_pbm (PNMRowInfo *ri,
guchar *data,
GError **error)
{
static gint line_len = 0; /* ascii pbm lines must be <= 70 chars long */
gint32 len = 0;
gint i;
gchar *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres; i++)
{
if (line_len > 69)
{
rbcur[i] = '\n';
line_len = 0;
len++;
rbcur++;
}
if (data[i] == ri->zero_is_black)
rbcur[i] = '0';
else
rbcur[i] = '1';
line_len++;
len++;
}
*(rbcur+i) = '\n';
return output_write (ri->output, ri->rowbuf, len, error);
}
/* Writes out RGB and grayscale raw rows */
static gboolean
pnmsaverow_raw (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
if (ri->bpc == 2)
{
gushort *d = (gushort *)data;
for (i = 0; i < ri->xres * ri->np; i++)
{
*d = g_htons(*d);
d++;
}
}
return output_write (ri->output, data, ri->xres * ri->np * ri->bpc, error);
}
/* Writes out RGB and grayscale float rows */
static gboolean
pnmsaverow_float (PNMRowInfo *ri,
const float *data,
GError **error)
{
return output_write (ri->output, data,
ri->xres * ri->np * sizeof (float),
error);
}
/* Writes out indexed raw rows */
static gboolean
pnmsaverow_raw_indexed (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
gint offset = 3;
gchar *rbcur = ri->rowbuf;
if (ri->alpha)
offset = 4;
for (i = 0; i < ri->xres; i++)
{
*(rbcur++) = ri->red[*data];
*(rbcur++) = ri->grn[*data];
if (! ri->alpha)
{
*(rbcur++) = ri->blu[*(data++)];
}
else
{
*(rbcur++) = ri->blu[*(data)];
*(rbcur++) = ri->alpha[*(data++)];
}
}
return output_write (ri->output, ri->rowbuf, ri->xres * offset, error);
}
/* Writes out RGB and grayscale ascii rows */
static gboolean
pnmsaverow_ascii (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
gchar *rbcur = ri->rowbuf;
gushort *sdata = (gushort *)data;
for (i = 0; i < ri->xres * ri->np; i++)
{
if (ri->bpc == 2)
{
sprintf ((gchar *) rbcur,"%d\n", 0xffff & *(sdata++));
}
else
{
sprintf ((gchar *) rbcur,"%d\n", 0xff & *(data++));
}
rbcur += strlen (rbcur);
}
return output_write (ri->output, ri->rowbuf, rbcur - ri->rowbuf,
error);
}
/* Writes out RGB and grayscale ascii rows */
static gboolean
pnmsaverow_ascii_indexed (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
gchar *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres; i++)
{
sprintf (rbcur, "%d\n", 0xff & ri->red[*(data)]);
rbcur += strlen (rbcur);
sprintf (rbcur, "%d\n", 0xff & ri->grn[*(data)]);
rbcur += strlen (rbcur);
sprintf (rbcur, "%d\n", 0xff & ri->blu[*(data++)]);
rbcur += strlen (rbcur);
}
return output_write (ri->output, ri->rowbuf, strlen ((char *) ri->rowbuf),
error);
}
static gboolean
save_image (GFile *file,
PikaImage *image,
PikaDrawable *drawable,
FileType file_type,
GObject *config,
GError **error)
{
gboolean status = FALSE;
GOutputStream *output = NULL;
GeglBuffer *buffer = NULL;
const Babl *format = NULL;
const gchar *header_string = NULL;
PikaImageType drawable_type;
PNMRowInfo rowinfo;
PNMSaverowFunc saverow = NULL;
guchar red[256];
guchar grn[256];
guchar blu[256];
guchar alpha[256]; /* PAM only */
gchar buf[BUFLEN];
gint np = 0;
gint xres, yres;
gint ypos, yend;
gint rowbufsize = 0;
gchar *comment = NULL;
gboolean config_raw = TRUE;
if (file_type != FILE_TYPE_PFM && file_type != FILE_TYPE_PAM)
g_object_get (config,
"raw", &config_raw,
NULL);
/* Make sure we're not saving an image with an alpha channel
* unless we're exporting a PAM file */
if (file_type != FILE_TYPE_PAM && pika_drawable_has_alpha (drawable))
{
g_message (_("Cannot export images with alpha channel."));
goto out;
}
pika_progress_init_printf (_("Exporting '%s'"),
g_file_get_parse_name (file));
/* open the file */
output = G_OUTPUT_STREAM (g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE,
NULL, error));
if (! output)
goto out;
buffer = pika_drawable_get_buffer (drawable);
xres = gegl_buffer_get_width (buffer);
yres = gegl_buffer_get_height (buffer);
drawable_type = pika_drawable_type (drawable);
switch (pika_image_get_precision (image))
{
case PIKA_PRECISION_U8_LINEAR:
case PIKA_PRECISION_U8_NON_LINEAR:
case PIKA_PRECISION_U8_PERCEPTUAL:
rowinfo.bpc = 1;
break;
default:
rowinfo.bpc = 2;
break;
}
/* write out magic number */
if (file_type == FILE_TYPE_PAM)
{
create_pam_header (&header_string, &rowinfo, &saverow, drawable_type,
buffer, &format, &rowbufsize, &np, comment);
}
else if (file_type != FILE_TYPE_PFM && ! config_raw)
{
if (file_type == FILE_TYPE_PBM)
{
header_string = "P1\n";
format = gegl_buffer_get_format (buffer);
np = 0;
rowbufsize = xres + (int) (xres / 70) + 1;
saverow = pnmsaverow_ascii_pbm;
}
else
{
switch (drawable_type)
{
case PIKA_GRAY_IMAGE:
header_string = "P2\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("Y' u8");
rowbufsize = xres * 4;
}
else
{
format = babl_format ("Y' u16");
rowbufsize = xres * 6;
}
np = 1;
saverow = pnmsaverow_ascii;
break;
case PIKA_RGB_IMAGE:
header_string = "P3\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("R'G'B' u8");
rowbufsize = xres * 12;
}
else
{
format = babl_format ("R'G'B' u16");
rowbufsize = xres * 18;
}
np = 3;
saverow = pnmsaverow_ascii;
break;
case PIKA_INDEXED_IMAGE:
header_string = "P3\n";
format = gegl_buffer_get_format (buffer);
np = 1;
rowbufsize = xres * 12;
saverow = pnmsaverow_ascii_indexed;
break;
default:
g_warning ("PNM: Unknown drawable_type\n");
goto out;
}
}
}
else if (file_type != FILE_TYPE_PFM)
{
if (file_type == FILE_TYPE_PBM)
{
header_string = "P4\n";
format = gegl_buffer_get_format (buffer);
np = 0;
rowbufsize = (gint) ceil ((gdouble) xres / 8.0);
saverow = pnmsaverow_raw_pbm;
}
else
{
switch (drawable_type)
{
case PIKA_GRAY_IMAGE:
header_string = "P5\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("Y' u8");
rowbufsize = xres;
}
else
{
format = babl_format ("Y' u16");
rowbufsize = xres * 2;
}
np = 1;
saverow = pnmsaverow_raw;
break;
case PIKA_RGB_IMAGE:
header_string = "P6\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("R'G'B' u8");
rowbufsize = xres * 3;
}
else
{
format = babl_format ("R'G'B' u16");
rowbufsize = xres * 6;
}
np = 3;
saverow = pnmsaverow_raw;
break;
case PIKA_INDEXED_IMAGE:
header_string = "P6\n";
format = gegl_buffer_get_format (buffer);
np = 1;
rowbufsize = xres * 3;
saverow = pnmsaverow_raw_indexed;
break;
default:
g_warning ("PNM: Unknown drawable_type\n");
goto out;
}
}
}
else
{
switch (drawable_type)
{
case PIKA_GRAY_IMAGE:
header_string = "Pf\n";
format = babl_format ("Y float");
np = 1;
break;
case PIKA_RGB_IMAGE:
header_string = "PF\n";
format = babl_format ("RGB float");
np = 3;
break;
default:
g_warning ("PFM: Unknown drawable_type\n");
goto out;
}
}
if (! output_write (output, header_string, strlen (header_string), error))
goto out;
rowinfo.zero_is_black = FALSE;
if (drawable_type == PIKA_INDEXED_IMAGE ||
drawable_type == PIKA_INDEXEDA_IMAGE)
{
guchar *cmap;
gint num_colors;
cmap = pika_image_get_colormap (image, NULL, &num_colors);
if (file_type == FILE_TYPE_PBM)
{
/* Test which of the two colors is white and which is black */
switch (num_colors)
{
case 1:
rowinfo.zero_is_black = (PIKA_RGB_LUMINANCE (cmap[0],
cmap[1],
cmap[2]) < 128);
break;
case 2:
rowinfo.zero_is_black = (PIKA_RGB_LUMINANCE (cmap[0],
cmap[1],
cmap[2]) <
PIKA_RGB_LUMINANCE (cmap[3],
cmap[4],
cmap[5]));
break;
default:
g_warning ("Images exported as PBM should be black/white");
break;
}
}
else
{
const guchar *c = cmap;
gint i;
for (i = 0; i < num_colors; i++)
{
red[i] = *c++;
grn[i] = *c++;
blu[i] = *c++;
if (drawable_type == PIKA_INDEXEDA_IMAGE)
alpha[i] = 255;
}
rowinfo.red = red;
rowinfo.grn = grn;
rowinfo.blu = blu;
if (drawable_type == PIKA_INDEXEDA_IMAGE)
rowinfo.alpha = alpha;
else
rowinfo.alpha = NULL;
}
g_free (cmap);
}
if (file_type != FILE_TYPE_PFM && file_type != FILE_TYPE_PAM)
{
/* write out comment string */
comment = g_strdup_printf("# Created by PIKA version %s PNM plug-in\n",
PIKA_VERSION);
if (! output_write (output, comment, strlen (comment), error))
goto out;
}
/* write out resolution and maxval */
if (file_type == FILE_TYPE_PBM)
{
g_snprintf (buf, sizeof (buf), "%d %d\n", xres, yres);
}
else if (file_type != FILE_TYPE_PFM)
{
g_snprintf (buf, sizeof (buf), "%d %d\n%d\n", xres, yres,
rowinfo.bpc == 1 ? 255 : 65535);
}
else
{
g_snprintf (buf, sizeof (buf), "%d %d\n%s\n", xres, yres,
G_BYTE_ORDER == G_BIG_ENDIAN ? "1.0" : "-1.0");
}
if (file_type != FILE_TYPE_PAM)
if (! output_write (output, buf, strlen (buf), error))
goto out;
if (file_type != FILE_TYPE_PFM)
{
guchar *data;
guchar *d;
gchar *rowbuf = NULL;
/* allocate a buffer for retrieving information from the pixel region */
data = g_new (guchar,
pika_tile_height () * xres *
babl_format_get_bytes_per_pixel (format));
rowbuf = g_new (gchar, rowbufsize + 1);
rowinfo.output = output;
rowinfo.rowbuf = rowbuf;
rowinfo.xres = xres;
rowinfo.np = np;
d = NULL; /* only to please the compiler */
/* Write the body out */
for (ypos = 0; ypos < yres; ypos++)
{
if ((ypos % pika_tile_height ()) == 0)
{
yend = ypos + pika_tile_height ();
yend = MIN (yend, yres);
gegl_buffer_get (buffer,
GEGL_RECTANGLE (0, ypos, xres, yend - ypos), 1.0,
format, data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
d = data;
}
if (! saverow (&rowinfo, d, error))
{
g_free (rowbuf);
g_free (data);
goto out;
}
d += xres * (np ? np : 1) * rowinfo.bpc;
if (ypos % 32 == 0)
pika_progress_update ((double) ypos / (double) yres);
}
g_free (rowbuf);
g_free (data);
}
else
{
/* allocate a buffer for retrieving information from the pixel
* region
*/
gfloat *data = g_new (gfloat, xres * np);
rowinfo.output = output;
rowinfo.rowbuf = NULL;
rowinfo.xres = xres;
rowinfo.np = np;
/* Write the body out in reverse row order */
for (ypos = yres - 1; ypos >= 0; ypos--)
{
gegl_buffer_get (buffer,
GEGL_RECTANGLE (0, ypos, xres, 1), 1.0,
format, data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
if (! pnmsaverow_float (&rowinfo, data, error))
{
g_free (data);
goto out;
}
if (ypos % 32 == 0)
pika_progress_update ((double) (yres - ypos) / (double) yres);
}
g_free (data);
}
pika_progress_update (1.0);
status = TRUE;
out:
if (! status)
{
GCancellable *cancellable = g_cancellable_new ();
g_cancellable_cancel (cancellable);
g_output_stream_close (output, cancellable, NULL);
g_object_unref (cancellable);
}
if (comment)
g_free (comment);
if (buffer)
g_object_unref (buffer);
if (output)
g_object_unref (output);
return status;
}
static gboolean
save_dialog (PikaProcedure *procedure,
GObject *config,
PikaImage *image)
{
GtkWidget *dialog;
GtkWidget *frame;
GtkListStore *store;
gboolean run;
dialog = pika_save_procedure_dialog_new (PIKA_SAVE_PROCEDURE (procedure),
PIKA_PROCEDURE_CONFIG (config),
image);
/* file save type */
store = pika_int_store_new (_("_ASCII"), 0,
_("_Raw"), 1,
NULL);
frame = pika_procedure_dialog_get_int_radio (PIKA_PROCEDURE_DIALOG (dialog),
"raw", PIKA_INT_STORE (store));
gtk_container_set_border_width (GTK_CONTAINER (frame), 12);
pika_procedure_dialog_fill (PIKA_PROCEDURE_DIALOG (dialog), NULL);
gtk_widget_show (dialog);
run = pika_procedure_dialog_run (PIKA_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}
/**************** FILE SCANNER UTILITIES **************/
/* pnmscanner_create ---
* Creates a new scanner based on a file descriptor. The
* look ahead buffer is one character initially.
*/
static PNMScanner *
pnmscanner_create (GInputStream *input)
{
PNMScanner *s;
gsize bytes_read;
s = g_new (PNMScanner, 1);
s->input = input;
s->inbuf = NULL;
s->eof = FALSE;
if (! g_input_stream_read_all (input, &s->cur, 1,
&bytes_read, NULL, NULL) ||
bytes_read != 1)
{
s->eof = TRUE;
}
return s;
}
/* pnmscanner_destroy ---
* Destroys a scanner and its resources. Doesn't close the fd.
*/
static void
pnmscanner_destroy (PNMScanner *s)
{
if (s->inbuf)
g_free (s->inbuf);
g_free (s);
}
/* pnmscanner_createbuffer ---
* Creates a buffer so we can do buffered reads.
*/
static void
pnmscanner_createbuffer (PNMScanner *s,
gint bufsize)
{
gsize bytes_read;
s->inbuf = g_new (gchar, bufsize);
s->inbufsize = bufsize;
s->inbufpos = 0;
s->inbufvalidsize = 0;
g_input_stream_read_all (s->input, s->inbuf, bufsize,
&bytes_read, NULL, NULL);
s->inbufvalidsize = bytes_read;
}
/* pnmscanner_gettoken ---
* Gets the next token, eating any leading whitespace.
*/
static void
pnmscanner_gettoken (PNMScanner *s,
gchar *buf,
gint bufsize)
{
gint ctr = 0;
pnmscanner_eatwhitespace (s);
while (! s->eof &&
! g_ascii_isspace (s->cur) &&
(s->cur != '#') &&
(ctr < bufsize))
{
buf[ctr++] = s->cur;
pnmscanner_getchar (s);
}
buf[ctr] = '\0';
}
/* pnmscanner_getsmalltoken ---
* Gets the next char, eating any leading whitespace.
*/
static void
pnmscanner_getsmalltoken (PNMScanner *s,
gchar *buf)
{
pnmscanner_eatwhitespace (s);
if (! s->eof && ! g_ascii_isspace (s->cur) && (s->cur != '#'))
{
*buf = s->cur;
pnmscanner_getchar (s);
}
}
/* pnmscanner_getchar ---
* Reads a character from the input stream
*/
static void
pnmscanner_getchar (PNMScanner *s)
{
if (s->inbuf)
{
s->cur = s->inbuf[s->inbufpos++];
if (s->inbufpos >= s->inbufvalidsize)
{
if (s->inbufpos > s->inbufvalidsize)
{
s->eof = 1;
}
else
{
gsize bytes_read;
g_input_stream_read_all (s->input, s->inbuf, s->inbufsize,
&bytes_read, NULL, NULL);
s->inbufvalidsize = bytes_read;
}
s->inbufpos = 0;
}
}
else
{
gsize bytes_read;
s->eof = FALSE;
if (! g_input_stream_read_all (s->input, &s->cur, 1,
&bytes_read, NULL, NULL) ||
bytes_read != 1)
{
s->eof = TRUE;
}
}
}
/* pnmscanner_eatwhitespace ---
* Eats up whitespace from the input and returns when done or eof.
* Also deals with comments.
*/
static void
pnmscanner_eatwhitespace (PNMScanner *s)
{
gint state = 0;
while (! (s->eof) && (state != -1))
{
switch (state)
{
case 0: /* in whitespace */
if (s->cur == '#')
{
state = 1; /* goto comment */
pnmscanner_getchar (s);
}
else if (! g_ascii_isspace (s->cur))
{
state = -1;
}
else
{
pnmscanner_getchar (s);
}
break;
case 1: /* in comment */
if (s->cur == '\n')
state = 0; /* goto whitespace */
pnmscanner_getchar (s);
break;
}
}
}
/* Code referenced from Jörg Walter */
/* pnmscanner_eatinnerspace ---
* Eats up spaces and tabs from PAM header input and returns when done or eof.
*/
static void
pnmscanner_eatinnerspace (PNMScanner *s)
{
while (! (s->eof) && (s->cur == ' ' || s->cur == '\t'))
pnmscanner_getchar (s);
}
/* Code referenced from Jörg Walter */
/* pnmscanner_getheaderline ---
* Gets the next header line (next token occurring at the start of a line)
*/
static void
pnmscanner_getheaderline (PNMScanner *s,
gchar *buf,
gint bufsize)
{
pnmscanner_eatinnerspace (s);
while (! (s->eof) && s->cur != '\n')
{
pnmscanner_gettoken (s, buf, bufsize);
pnmscanner_eatinnerspace (s);
}
pnmscanner_gettoken (s, buf, bufsize);
}