AlderconeStudio/PIKApp
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PIKApp
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PIKApp/plug-ins/file-exr/file-exr.c

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/* 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
*
* 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/>.
*/
#include "config.h"
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#include "libpika/stdplugins-intl.h"
#include "openexr-wrapper.h"
#define LOAD_PROC "file-exr-load"
#define PLUG_IN_BINARY "file-exr"
#define PLUG_IN_VERSION "0.0.0"
typedef struct _Exr Exr;
typedef struct _ExrClass ExrClass;
struct _Exr
{
PikaPlugIn parent_instance;
};
struct _ExrClass
{
PikaPlugInClass parent_class;
};
#define EXR_TYPE (exr_get_type ())
#define EXR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), EXR_TYPE, Exr))
GType exr_get_type (void) G_GNUC_CONST;
static GList * exr_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * exr_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * exr_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data);
static PikaImage * load_image (GFile *file,
gboolean interactive,
GError **error);
static void sanitize_comment (gchar *comment);
void load_dialog (void);
G_DEFINE_TYPE (Exr, exr, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (EXR_TYPE)
DEFINE_STD_SET_I18N
static void
exr_class_init (ExrClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = exr_query_procedures;
plug_in_class->create_procedure = exr_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
exr_init (Exr *exr)
{
}
static GList *
exr_query_procedures (PikaPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (LOAD_PROC));
}
static PikaProcedure *
exr_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,
exr_load, NULL, NULL);
pika_procedure_set_menu_label (procedure, _("OpenEXR image"));
pika_procedure_set_documentation (procedure,
_("Loads files in the OpenEXR file format"),
"This plug-in loads OpenEXR files. ",
name);
pika_procedure_set_attribution (procedure,
"Dominik Ernst <dernst@gmx.de>, "
"Mukund Sivaraman <muks@banu.com>",
"Dominik Ernst <dernst@gmx.de>, "
"Mukund Sivaraman <muks@banu.com>",
NULL);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-exr");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"exr");
pika_file_procedure_set_magics (PIKA_FILE_PROCEDURE (procedure),
"0,long,0x762f3101");
}
return procedure;
}
static PikaValueArray *
exr_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data)
{
PikaValueArray *return_vals;
PikaImage *image;
GError *error = NULL;
gegl_init (NULL, NULL);
image = load_image (file, run_mode == PIKA_RUN_INTERACTIVE,
&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 PikaImage *
load_image (GFile *file,
gboolean interactive,
GError **error)
{
EXRLoader *loader;
gint width;
gint height;
gboolean has_alpha;
PikaImageBaseType image_type;
PikaPrecision image_precision;
PikaImage *image = NULL;
PikaImageType layer_type;
PikaLayer *layer;
const Babl *format;
GeglBuffer *buffer = NULL;
gint bpp;
gint tile_height;
gchar *pixels = NULL;
gint begin;
gint32 success = FALSE;
gchar *comment = NULL;
PikaColorProfile *profile = NULL;
guchar *exif_data;
guint exif_size;
guchar *xmp_data;
guint xmp_size;
pika_progress_init_printf (_("Opening '%s'"),
pika_file_get_utf8_name (file));
loader = exr_loader_new (g_file_peek_path (file));
if (! loader)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error opening file '%s' for reading"),
pika_file_get_utf8_name (file));
goto out;
}
width = exr_loader_get_width (loader);
height = exr_loader_get_height (loader);
if ((width < 1) || (height < 1))
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error querying image dimensions from '%s'"),
pika_file_get_utf8_name (file));
goto out;
}
has_alpha = exr_loader_has_alpha (loader) ? TRUE : FALSE;
switch (exr_loader_get_precision (loader))
{
case PREC_UINT:
image_precision = PIKA_PRECISION_U32_LINEAR;
break;
case PREC_HALF:
image_precision = PIKA_PRECISION_HALF_LINEAR;
break;
case PREC_FLOAT:
image_precision = PIKA_PRECISION_FLOAT_LINEAR;
break;
default:
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error querying image precision from '%s'"),
pika_file_get_utf8_name (file));
goto out;
}
switch (exr_loader_get_image_type (loader))
{
case IMAGE_TYPE_RGB:
image_type = PIKA_RGB;
layer_type = has_alpha ? PIKA_RGBA_IMAGE : PIKA_RGB_IMAGE;
break;
case IMAGE_TYPE_GRAY:
case IMAGE_TYPE_UNKNOWN_1_CHANNEL:
image_type = PIKA_GRAY;
layer_type = has_alpha ? PIKA_GRAYA_IMAGE : PIKA_GRAY_IMAGE;
break;
default:
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error querying image type from '%s'"),
pika_file_get_utf8_name (file));
goto out;
}
image = pika_image_new_with_precision (width, height,
image_type, image_precision);
if (! image)
{
g_set_error (error, 0, 0,
_("Could not create new image for '%s': %s"),
pika_file_get_utf8_name (file),
pika_pdb_get_last_error (pika_get_pdb ()));
goto out;
}
if (exr_loader_get_image_type (loader) == IMAGE_TYPE_UNKNOWN_1_CHANNEL &&
interactive)
load_dialog ();
/* try to load an icc profile, it will be generated on the fly if
* chromaticities are given
*/
if (image_type == PIKA_RGB)
{
profile = exr_loader_get_profile (loader);
if (profile)
pika_image_set_color_profile (image, profile);
}
layer = pika_layer_new (image, _("Background"), width, height,
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));
format = pika_drawable_get_format (PIKA_DRAWABLE (layer));
bpp = babl_format_get_bytes_per_pixel (format);
tile_height = pika_tile_height ();
pixels = g_new0 (gchar, tile_height * width * bpp);
for (begin = 0; begin < height; begin += tile_height)
{
gint end;
gint num;
gint i;
end = MIN (begin + tile_height, height);
num = end - begin;
for (i = 0; i < num; i++)
{
gint retval;
retval = exr_loader_read_pixel_row (loader,
pixels + (i * width * bpp),
bpp, begin + i);
if (retval < 0)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error reading pixel data from '%s'"),
pika_file_get_utf8_name (file));
goto out;
}
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, begin, width, num),
0, NULL, pixels, GEGL_AUTO_ROWSTRIDE);
pika_progress_update ((gdouble) begin / (gdouble) height);
}
/* try to read the file comment */
comment = exr_loader_get_comment (loader);
if (comment)
{
PikaParasite *parasite;
sanitize_comment (comment);
parasite = pika_parasite_new ("pika-comment",
PIKA_PARASITE_PERSISTENT,
strlen (comment) + 1,
comment);
pika_image_attach_parasite (image, parasite);
pika_parasite_free (parasite);
}
/* check if the image contains Exif or Xmp data and read it */
exif_data = exr_loader_get_exif (loader, &exif_size);
xmp_data = exr_loader_get_xmp (loader, &xmp_size);
if (exif_data || xmp_data)
{
PikaMetadata *metadata = pika_metadata_new ();
PikaMetadataLoadFlags flags = PIKA_METADATA_LOAD_ALL;
if (exif_data)
{
pika_metadata_set_from_exif (metadata, exif_data, exif_size, NULL);
g_free (exif_data);
}
if (xmp_data)
{
pika_metadata_set_from_xmp (metadata, xmp_data, xmp_size, NULL);
g_free (xmp_data);
}
if (comment)
flags &= ~PIKA_METADATA_LOAD_COMMENT;
if (profile)
flags &= ~PIKA_METADATA_LOAD_COLORSPACE;
pika_image_metadata_load_finish (image, "image/exr",
metadata, flags);
g_object_unref (metadata);
}
pika_progress_update (1.0);
success = TRUE;
out:
g_clear_object (&profile);
g_clear_object (&buffer);
g_clear_pointer (&pixels, g_free);
g_clear_pointer (&comment, g_free);
g_clear_pointer (&loader, exr_loader_unref);
if (success)
return image;
if (image)
pika_image_delete (image);
return NULL;
}
/* copy & pasted from file-jpeg/jpeg-load.c */
static void
sanitize_comment (gchar *comment)
{
const gchar *start_invalid;
if (! g_utf8_validate (comment, -1, &start_invalid))
{
guchar *c;
for (c = (guchar *) start_invalid; *c; c++)
{
if (*c > 126 || (*c < 32 && *c != '\t' && *c != '\n' && *c != '\r'))
*c = '?';
}
}
}
void
load_dialog (void)
{
GtkWidget *dialog;
GtkWidget *label;
GtkWidget *vbox;
gchar *label_text;
pika_ui_init (PLUG_IN_BINARY);
dialog = pika_dialog_new (_("Import OpenEXR"),
"openexr-notice",
NULL, 0, NULL, NULL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
pika_window_set_transient (GTK_WINDOW (dialog));
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
label_text = g_strdup_printf ("<b>%s</b>\n%s", _("Unknown Channel Name"),
_("The image contains a single unknown channel.\n"
"It has been converted to grayscale."));
label = gtk_label_new (NULL);
gtk_label_set_markup (GTK_LABEL (label), label_text);
gtk_label_set_selectable (GTK_LABEL (label), TRUE);
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
gtk_label_set_yalign (GTK_LABEL (label), 0.0);
gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
g_free (label_text);
gtk_widget_show (dialog);
/* run the dialog */
pika_dialog_run (PIKA_DIALOG (dialog));
gtk_widget_destroy (dialog);
}
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