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Gimp/plug-ins/common/file-pdf-load.c
Jehan 809e79f37a Issue #4919: PDF: Order of pages reversed when opening and closing. 
Let's go with the logics "bottom layer is first", which is also the
logics in animated formats. Hence changing the layer order on loading
multi-page PDF.
2020-04-08 20:08:00 +02:00

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/* GIMP - The GNU Image Manipulation Program
*
* file-pdf-load.c - PDF file loader
*
* Copyright (C) 2005 Nathan Summers
*
* Some code in render_page_to_surface() borrowed from
* poppler.git/glib/poppler-page.cc.
*
* 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 <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#undef GTK_DISABLE_SINGLE_INCLUDES
#include <poppler.h>
#define GTK_DISABLE_SINGLE_INCLUDES
#include "libgimp/stdplugins-intl.h"
/**
** the following was formerly part of
** gimpresolutionentry.h and gimpresolutionentry.c,
** moved here because this is the only thing that uses
** it, and it is undesirable to maintain all that api.
** Most unused functions have been removed.
**/
#define GIMP_TYPE_RESOLUTION_ENTRY (gimp_resolution_entry_get_type ())
#define GIMP_RESOLUTION_ENTRY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_RESOLUTION_ENTRY, GimpResolutionEntry))
#define GIMP_RESOLUTION_ENTRY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_RESOLUTION_ENTRY, GimpResolutionEntryClass))
#define GIMP_IS_RESOLUTION_ENTRY(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GIMP_TYPE_RESOLUTION_ENTRY))
#define GIMP_IS_RESOLUTION_ENTRY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_RESOLUTION_ENTRY))
#define GIMP_RESOLUTION_ENTRY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_RESOLUTION_ENTRY, GimpResolutionEntryClass))
typedef struct _GimpResolutionEntry GimpResolutionEntry;
typedef struct _GimpResolutionEntryClass GimpResolutionEntryClass;
typedef struct _GimpResolutionEntryField GimpResolutionEntryField;
struct _GimpResolutionEntryField
{
GimpResolutionEntry *gre;
GimpResolutionEntryField *corresponding;
gboolean size;
GtkWidget *label;
guint changed_signal;
GtkAdjustment *adjustment;
GtkWidget *spinbutton;
gdouble phy_size;
gdouble value;
gdouble min_value;
gdouble max_value;
gint stop_recursion;
};
struct _GimpResolutionEntry
{
GtkGrid parent_instance;
GimpUnit size_unit;
GimpUnit unit;
GtkWidget *unitmenu;
GtkWidget *chainbutton;
GimpResolutionEntryField width;
GimpResolutionEntryField height;
GimpResolutionEntryField x;
GimpResolutionEntryField y;
};
struct _GimpResolutionEntryClass
{
GtkGridClass parent_class;
void (* value_changed) (GimpResolutionEntry *gse);
void (* refval_changed) (GimpResolutionEntry *gse);
void (* unit_changed) (GimpResolutionEntry *gse);
};
GType gimp_resolution_entry_get_type (void) G_GNUC_CONST;
GtkWidget * gimp_resolution_entry_new (const gchar *width_label,
gdouble width,
const gchar *height_label,
gdouble height,
GimpUnit size_unit,
const gchar *res_label,
gdouble initial_res,
GimpUnit initial_unit);
GtkWidget * gimp_resolution_entry_attach_label (GimpResolutionEntry *gre,
const gchar *text,
gint row,
gint column,
gfloat alignment);
gdouble gimp_resolution_entry_get_x_in_dpi (GimpResolutionEntry *gre);
gdouble gimp_resolution_entry_get_y_in_dpi (GimpResolutionEntry *gre);
/* signal callback convenience functions */
void gimp_resolution_entry_update_x_in_dpi (GimpResolutionEntry *gre,
gpointer data);
void gimp_resolution_entry_update_y_in_dpi (GimpResolutionEntry *gre,
gpointer data);
enum
{
WIDTH_CHANGED,
HEIGHT_CHANGED,
X_CHANGED,
Y_CHANGED,
UNIT_CHANGED,
LAST_SIGNAL
};
static void gimp_resolution_entry_class_init (GimpResolutionEntryClass *class);
static void gimp_resolution_entry_init (GimpResolutionEntry *gre);
static void gimp_resolution_entry_update_value (GimpResolutionEntryField *gref,
gdouble value);
static void gimp_resolution_entry_value_callback (GtkAdjustment *adjustment,
gpointer data);
static void gimp_resolution_entry_update_unit (GimpResolutionEntry *gre,
GimpUnit unit);
static void gimp_resolution_entry_unit_callback (GtkWidget *widget,
GimpResolutionEntry *gre);
static void gimp_resolution_entry_field_init (GimpResolutionEntry *gre,
GimpResolutionEntryField *gref,
GimpResolutionEntryField *corresponding,
guint changed_signal,
gdouble initial_val,
GimpUnit initial_unit,
gboolean size,
gint spinbutton_width);
static void gimp_resolution_entry_format_label (GimpResolutionEntry *gre,
GtkWidget *label,
gdouble size);
/**
** end of gimpresolutionentry stuff
** the actual code can be found at the end of this file
**/
#define LOAD_PROC "file-pdf-load"
#define LOAD_THUMB_PROC "file-pdf-load-thumb"
#define PLUG_IN_BINARY "file-pdf-load"
#define PLUG_IN_ROLE "gimp-file-pdf-load"
#define THUMBNAIL_SIZE 128
#define GIMP_PLUGIN_PDF_LOAD_ERROR gimp_plugin_pdf_load_error_quark ()
static GQuark
gimp_plugin_pdf_load_error_quark (void)
{
return g_quark_from_static_string ("gimp-plugin-pdf-load-error-quark");
}
/* Structs for the load dialog */
typedef struct
{
GimpPageSelectorTarget target;
gdouble resolution;
gboolean antialias;
gchar *PDF_password;
} PdfLoadVals;
static PdfLoadVals loadvals =
{
GIMP_PAGE_SELECTOR_TARGET_LAYERS,
100.00, /* 100 dpi */
TRUE,
NULL
};
typedef struct
{
gint n_pages;
gint *pages;
} PdfSelectedPages;
typedef struct _Pdf Pdf;
typedef struct _PdfClass PdfClass;
struct _Pdf
{
GimpPlugIn parent_instance;
};
struct _PdfClass
{
GimpPlugInClass parent_class;
};
#define PDF_TYPE (pdf_get_type ())
#define PDF (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PDF_TYPE, Pdf))
GType pdf_get_type (void) G_GNUC_CONST;
static GList * pdf_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * pdf_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * pdf_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
const GimpValueArray *args,
gpointer run_data);
static GimpValueArray * pdf_load_thumb (GimpProcedure *procedure,
GFile *file,
gint size,
const GimpValueArray *args,
gpointer run_data);
static GimpImage * load_image (PopplerDocument *doc,
GFile *file,
GimpRunMode run_mode,
GimpPageSelectorTarget target,
guint32 resolution,
gboolean antialias,
PdfSelectedPages *pages);
static GimpPDBStatusType load_dialog (PopplerDocument *doc,
PdfSelectedPages *pages);
static PopplerDocument * open_document (GFile *file,
const gchar *PDF_password,
GimpRunMode run_mode,
GError **error);
static cairo_surface_t * get_thumb_surface (PopplerDocument *doc,
gint page,
gint preferred_size);
static GdkPixbuf * get_thumb_pixbuf (PopplerDocument *doc,
gint page,
gint preferred_size);
static GimpLayer * layer_from_surface (GimpImage *image,
const gchar *layer_name,
gint position,
cairo_surface_t *surface,
gdouble progress_start,
gdouble progress_scale);
G_DEFINE_TYPE (Pdf, pdf, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (PDF_TYPE)
static void
pdf_class_init (PdfClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = pdf_query_procedures;
plug_in_class->create_procedure = pdf_create_procedure;
}
static void
pdf_init (Pdf *pdf)
{
}
static GList *
pdf_query_procedures (GimpPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_THUMB_PROC));
list = g_list_append (list, g_strdup (LOAD_PROC));
return list;
}
static GimpProcedure *
pdf_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = gimp_load_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
pdf_load, NULL, NULL);
gimp_procedure_set_menu_label (procedure, N_("Portable Document Format"));
gimp_procedure_set_documentation (procedure,
"Load file in PDF format",
"Loads files in Adobe's Portable "
"Document Format. PDF is designed to "
"be easily processed by a variety "
"of different platforms, and is a "
"distant cousin of PostScript.",
name);
gimp_procedure_set_attribution (procedure,
"Nathan Summers, Lionel N.",
"Nathan Summers, Lionel N.",
"2005, 2017");
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"application/pdf");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"pdf");
gimp_file_procedure_set_magics (GIMP_FILE_PROCEDURE (procedure),
"0, string,%PDF-");
gimp_load_procedure_set_thumbnail_loader (GIMP_LOAD_PROCEDURE (procedure),
LOAD_THUMB_PROC);
GIMP_PROC_ARG_STRING (procedure, "pdf-password",
"PDF password",
"The password to decrypt the encrypted PDF file",
NULL,
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "n-pages",
"N pages",
"Number of pages to load (0 for all)",
0, G_MAXINT, 0,
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT32_ARRAY (procedure, "pages",
"Pages",
"The pages to load in the expected order",
G_PARAM_READWRITE);
}
else if (! strcmp (name, LOAD_THUMB_PROC))
{
procedure = gimp_thumbnail_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
pdf_load_thumb, NULL, NULL);
gimp_procedure_set_documentation (procedure,
"Loads a preview from a PDF file.",
"Loads a small preview of the first "
"page of the PDF format file. Uses "
"the embedded thumbnail if present.",
name);
gimp_procedure_set_attribution (procedure,
"Nathan Summers",
"Nathan Summers",
"2005");
}
return procedure;
}
static GimpValueArray *
pdf_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
const GimpValueArray *args,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpImage *image = NULL;
PopplerDocument *doc = NULL;
PdfSelectedPages pages = { 0, NULL };
GError *error = NULL;
INIT_I18N ();
gegl_init (NULL, NULL);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (LOAD_PROC, &loadvals);
gimp_ui_init (PLUG_IN_BINARY);
doc = open_document (file,
loadvals.PDF_password,
run_mode, &error);
if (! doc)
{
status = GIMP_PDB_EXECUTION_ERROR;
break;
}
status = load_dialog (doc, &pages);
if (status == GIMP_PDB_SUCCESS)
{
gimp_set_data (LOAD_PROC, &loadvals, sizeof(loadvals));
}
break;
case GIMP_RUN_WITH_LAST_VALS:
/* FIXME: implement last vals mode */
status = GIMP_PDB_EXECUTION_ERROR;
break;
case GIMP_RUN_NONINTERACTIVE:
doc = open_document (file,
GIMP_VALUES_GET_STRING (args, 0),
run_mode, &error);
if (doc)
{
PopplerPage *test_page = poppler_document_get_page (doc, 0);
if (test_page)
{
gint i;
gint doc_n_pages;
doc_n_pages = poppler_document_get_n_pages (doc);
/* The number of imported pages may be bigger than
* the number of pages from the original document.
* Indeed it is possible to duplicate some pages
* by setting the same number several times in the
* "pages" argument.
* Not ceiling this value is *not* an error.
*/
pages.n_pages = GIMP_VALUES_GET_INT (args, 1);
if (pages.n_pages <= 0)
{
pages.n_pages = doc_n_pages;
pages.pages = g_new (gint, pages.n_pages);
for (i = 0; i < pages.n_pages; i++)
pages.pages[i] = i;
}
else
{
const gint32 *p = GIMP_VALUES_GET_INT32_ARRAY (args, 2);
pages.pages = g_new (gint, pages.n_pages);
for (i = 0; i < pages.n_pages; i++)
{
if (p[i] >= doc_n_pages)
{
status = GIMP_PDB_EXECUTION_ERROR;
g_set_error (&error, GIMP_PLUGIN_PDF_LOAD_ERROR, 0,
/* TRANSLATORS: first argument is file name,
* second is out-of-range page number,
* third is number of pages.
* Specify order as in English if needed.
*/
ngettext ("PDF document '%1$s' has %3$d page. Page %2$d is out of range.",
"PDF document '%1$s' has %3$d pages. Page %2$d is out of range.",
doc_n_pages),
gimp_file_get_utf8_name (file),
p[i],
doc_n_pages);
break;
}
else
{
pages.pages[i] = p[i];
}
}
}
g_object_unref (test_page);
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
g_object_unref (doc);
}
break;
}
if (status == GIMP_PDB_SUCCESS)
{
image = load_image (doc,
file,
run_mode,
loadvals.target,
loadvals.resolution,
loadvals.antialias,
&pages);
}
if (doc)
g_object_unref (doc);
g_free (pages.pages);
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static GimpValueArray *
pdf_load_thumb (GimpProcedure *procedure,
GFile *file,
gint size,
const GimpValueArray *args,
gpointer run_data)
{
GimpValueArray *return_vals;
gdouble width = 0;
gdouble height = 0;
gdouble scale;
GimpImage *image = NULL;
gint num_pages = 0;
PopplerDocument *doc = NULL;
cairo_surface_t *surface = NULL;
GError *error = NULL;
INIT_I18N ();
gegl_init (NULL, NULL);
doc = open_document (file,
NULL,
GIMP_RUN_NONINTERACTIVE,
&error);
if (doc)
{
PopplerPage *page = poppler_document_get_page (doc, 0);
if (page)
{
poppler_page_get_size (page, &width, &height);
g_object_unref (page);
}
num_pages = poppler_document_get_n_pages (doc);
surface = get_thumb_surface (doc, 0, size);
g_object_unref (doc);
}
if (surface)
{
image = gimp_image_new (cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
GIMP_RGB);
gimp_image_undo_disable (image);
layer_from_surface (image, "thumbnail", 0, surface, 0.0, 1.0);
cairo_surface_destroy (surface);
gimp_image_undo_enable (image);
gimp_image_clean_all (image);
}
scale = loadvals.resolution / gimp_unit_get_factor (GIMP_UNIT_POINT);
width *= scale;
height *= scale;
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
GIMP_VALUES_SET_INT (return_vals, 2, width);
GIMP_VALUES_SET_INT (return_vals, 3, height);
GIMP_VALUES_SET_ENUM (return_vals, 4, GIMP_RGB_IMAGE);
GIMP_VALUES_SET_INT (return_vals, 5, num_pages);
return return_vals;
}
static PopplerDocument *
open_document (GFile *file,
const gchar *PDF_password,
GimpRunMode run_mode,
GError **load_error)
{
PopplerDocument *doc;
GError *error = NULL;
doc = poppler_document_new_from_gfile (file, PDF_password, NULL, &error);
if (run_mode == GIMP_RUN_INTERACTIVE)
{
GtkWidget *label;
label = gtk_label_new (_("PDF is password protected, please input the password:"));
while (error &&
error->domain == POPPLER_ERROR &&
error->code == POPPLER_ERROR_ENCRYPTED)
{
GtkWidget *vbox;
GtkWidget *dialog;
GtkWidget *entry;
gint run;
dialog = gimp_dialog_new (_("Encrypted PDF"), PLUG_IN_ROLE,
NULL, 0,
NULL, NULL,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
gimp_window_set_transient (GTK_WINDOW (dialog));
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
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);
entry = gtk_entry_new ();
gtk_entry_set_visibility (GTK_ENTRY (entry), FALSE);
gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
gtk_container_add (GTK_CONTAINER (vbox), label);
gtk_container_add (GTK_CONTAINER (vbox), entry);
gtk_widget_show_all (dialog);
run = gimp_dialog_run (GIMP_DIALOG (dialog));
if (run == GTK_RESPONSE_OK)
{
g_clear_error (&error);
doc = poppler_document_new_from_gfile (file,
gtk_entry_get_text (GTK_ENTRY (entry)),
NULL, &error);
}
label = gtk_label_new (_("Wrong password! Please input the right one:"));
gtk_widget_destroy (dialog);
if (run == GTK_RESPONSE_CANCEL || run == GTK_RESPONSE_DELETE_EVENT)
{
break;
}
}
gtk_widget_destroy (label);
}
/* We can't g_mapped_file_unref(mapped_file) as apparently doc has
* references to data in there. No big deal, this is just a
* short-lived plug-in.
*/
if (! doc)
{
g_set_error (load_error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Could not load '%s': %s"),
gimp_file_get_utf8_name (file),
error->message);
g_error_free (error);
return NULL;
}
return doc;
}
static GimpLayer *
layer_from_surface (GimpImage *image,
const gchar *layer_name,
gint position,
cairo_surface_t *surface,
gdouble progress_start,
gdouble progress_scale)
{
GimpLayer *layer;
layer = gimp_layer_new_from_surface (image, layer_name, surface,
progress_start,
progress_start + progress_scale);
gimp_image_insert_layer (image, layer, NULL, position);
return layer;
}
static cairo_surface_t *
render_page_to_surface (PopplerPage *page,
int width,
int height,
double scale,
gboolean antialias)
{
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
cr = cairo_create (surface);
cairo_save (cr);
cairo_translate (cr, 0.0, 0.0);
if (scale != 1.0)
cairo_scale (cr, scale, scale);
if (! antialias)
{
cairo_font_options_t *options = cairo_font_options_create ();
cairo_get_font_options (cr, options);
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_NONE);
cairo_set_font_options (cr, options);
cairo_font_options_destroy (options);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
}
poppler_page_render (page, cr);
cairo_restore (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_paint (cr);
cairo_destroy (cr);
return surface;
}
#if 0
/* This is currently unused, but we'll have it here in case the military
wants it. */
static GdkPixbuf *
render_page_to_pixbuf (PopplerPage *page,
int width,
int height,
double scale)
{
GdkPixbuf *pixbuf;
cairo_surface_t *surface;
surface = render_page_to_surface (page, width, height, scale);
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cairo_surface_destroy (surface);
return pixbuf;
}
#endif
static GimpImage *
load_image (PopplerDocument *doc,
GFile *file,
GimpRunMode run_mode,
GimpPageSelectorTarget target,
guint32 resolution,
gboolean antialias,
PdfSelectedPages *pages)
{
GimpImage *image = NULL;
GimpImage **images = NULL;
gint i;
gdouble scale;
gdouble doc_progress = 0;
if (target == GIMP_PAGE_SELECTOR_TARGET_IMAGES)
images = g_new0 (GimpImage *, pages->n_pages);
gimp_progress_init_printf (_("Opening '%s'"),
gimp_file_get_utf8_name (file));
scale = resolution / gimp_unit_get_factor (GIMP_UNIT_POINT);
/* read the file */
for (i = 0; i < pages->n_pages; i++)
{
PopplerPage *page;
gchar *page_label;
gdouble page_width;
gdouble page_height;
cairo_surface_t *surface;
gint width;
gint height;
page = poppler_document_get_page (doc, pages->pages[i]);
poppler_page_get_size (page, &page_width, &page_height);
width = page_width * scale;
height = page_height * scale;
g_object_get (G_OBJECT (page), "label", &page_label, NULL);
if (! image)
{
GFile *new_file;
gchar *uri;
gchar *new_uri;
image = gimp_image_new (width, height, GIMP_RGB);
gimp_image_undo_disable (image);
uri = g_file_get_uri (file);
if (target == GIMP_PAGE_SELECTOR_TARGET_IMAGES)
new_uri = g_strdup_printf (_("%s-%s"), uri, page_label);
else
new_uri = g_strdup_printf (_("%s-pages"), uri);
g_free (uri);
new_file = g_file_new_for_uri (new_uri);
g_free (new_uri);
gimp_image_set_file (image, new_file);
g_object_unref (new_file);
gimp_image_set_resolution (image, resolution, resolution);
}
surface = render_page_to_surface (page, width, height, scale, antialias);
layer_from_surface (image, page_label, 0, surface,
doc_progress, 1.0 / pages->n_pages);
g_free (page_label);
cairo_surface_destroy (surface);
doc_progress = (double) (i + 1) / pages->n_pages;
gimp_progress_update (doc_progress);
if (target == GIMP_PAGE_SELECTOR_TARGET_IMAGES)
{
images[i] = image;
gimp_image_undo_enable (image);
gimp_image_clean_all (image);
image = 0;
}
}
gimp_progress_update (1.0);
if (image)
{
gimp_image_undo_enable (image);
gimp_image_clean_all (image);
}
if (target == GIMP_PAGE_SELECTOR_TARGET_IMAGES)
{
if (run_mode != GIMP_RUN_NONINTERACTIVE)
{
/* Display images in reverse order. The last will be
* displayed by GIMP itself
*/
for (i = pages->n_pages - 1; i > 0; i--)
gimp_display_new (images[i]);
}
image = images[0];
g_free (images);
}
return image;
}
static cairo_surface_t *
get_thumb_surface (PopplerDocument *doc,
gint page_num,
gint preferred_size)
{
PopplerPage *page;
cairo_surface_t *surface;
page = poppler_document_get_page (doc, page_num);
if (! page)
return NULL;
surface = poppler_page_get_thumbnail (page);
if (! surface)
{
gdouble width;
gdouble height;
gdouble scale;
poppler_page_get_size (page, &width, &height);
scale = (gdouble) preferred_size / MAX (width, height);
width *= scale;
height *= scale;
surface = render_page_to_surface (page, width, height, scale, TRUE);
}
g_object_unref (page);
return surface;
}
static GdkPixbuf *
get_thumb_pixbuf (PopplerDocument *doc,
gint page_num,
gint preferred_size)
{
cairo_surface_t *surface;
GdkPixbuf *pixbuf;
surface = get_thumb_surface (doc, page_num, preferred_size);
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cairo_surface_destroy (surface);
return pixbuf;
}
typedef struct
{
PopplerDocument *document;
GimpPageSelector *selector;
gboolean stop_thumbnailing;
} ThreadData;
typedef struct
{
GimpPageSelector *selector;
gint page_no;
GdkPixbuf *pixbuf;
} IdleData;
static gboolean
idle_set_thumbnail (gpointer data)
{
IdleData *idle_data = data;
gimp_page_selector_set_page_thumbnail (idle_data->selector,
idle_data->page_no,
idle_data->pixbuf);
g_object_unref (idle_data->pixbuf);
g_free (idle_data);
return FALSE;
}
static gpointer
thumbnail_thread (gpointer data)
{
ThreadData *thread_data = data;
gint n_pages;
gint i;
n_pages = poppler_document_get_n_pages (thread_data->document);
for (i = 0; i < n_pages; i++)
{
IdleData *idle_data = g_new0 (IdleData, 1);
idle_data->selector = thread_data->selector;
idle_data->page_no = i;
/* FIXME get preferred size from somewhere? */
idle_data->pixbuf = get_thumb_pixbuf (thread_data->document, i,
THUMBNAIL_SIZE);
g_idle_add (idle_set_thumbnail, idle_data);
if (thread_data->stop_thumbnailing)
break;
}
return NULL;
}
static GimpPDBStatusType
load_dialog (PopplerDocument *doc,
PdfSelectedPages *pages)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkWidget *title;
GtkWidget *selector;
GtkWidget *resolution;
GtkWidget *antialias;
GtkWidget *hbox;
ThreadData thread_data;
GThread *thread;
gint i;
gint n_pages;
gdouble width;
gdouble height;
gboolean run;
dialog = gimp_dialog_new (_("Import from PDF"), PLUG_IN_ROLE,
NULL, 0,
gimp_standard_help_func, LOAD_PROC,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Import"), GTK_RESPONSE_OK,
NULL);
gimp_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dialog));
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
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);
/* Title */
title = gimp_prop_label_new (G_OBJECT (doc), "title");
gtk_label_set_ellipsize (GTK_LABEL (title), PANGO_ELLIPSIZE_END);
gtk_box_pack_start (GTK_BOX (vbox), title, FALSE, FALSE, 0);
/* Page Selector */
selector = gimp_page_selector_new ();
gtk_widget_set_size_request (selector, 380, 360);
gtk_box_pack_start (GTK_BOX (vbox), selector, TRUE, TRUE, 0);
gtk_widget_show (selector);
n_pages = poppler_document_get_n_pages (doc);
if (n_pages <= 0)
{
g_message (_("Error getting number of pages from the given PDF file."));
return GIMP_PDB_EXECUTION_ERROR;
}
gimp_page_selector_set_n_pages (GIMP_PAGE_SELECTOR (selector), n_pages);
gimp_page_selector_set_target (GIMP_PAGE_SELECTOR (selector),
loadvals.target);
for (i = 0; i < n_pages; i++)
{
PopplerPage *page;
gchar *label;
page = poppler_document_get_page (doc, i);
g_object_get (G_OBJECT (page), "label", &label, NULL);
gimp_page_selector_set_page_label (GIMP_PAGE_SELECTOR (selector), i,
label);
if (i == 0)
poppler_page_get_size (page, &width, &height);
g_object_unref (page);
g_free (label);
}
/* Since selecting none will be equivalent to selecting all, this is
* only useful as a feedback for the default behavior of selecting all
* pages. */
gimp_page_selector_select_all (GIMP_PAGE_SELECTOR (selector));
g_signal_connect_swapped (selector, "activate",
G_CALLBACK (gtk_window_activate_default),
dialog);
thread_data.document = doc;
thread_data.selector = GIMP_PAGE_SELECTOR (selector);
thread_data.stop_thumbnailing = FALSE;
thread = g_thread_new ("thumbnailer", thumbnail_thread, &thread_data);
/* Resolution */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
resolution = gimp_resolution_entry_new (_("_Width (pixels):"), width,
_("_Height (pixels):"), height,
GIMP_UNIT_POINT,
_("_Resolution:"),
loadvals.resolution, GIMP_UNIT_INCH);
gtk_box_pack_start (GTK_BOX (hbox), resolution, FALSE, FALSE, 0);
gtk_widget_show (resolution);
g_signal_connect (resolution, "x-changed",
G_CALLBACK (gimp_resolution_entry_update_x_in_dpi),
&loadvals.resolution);
/* Antialiasing*/
antialias = gtk_check_button_new_with_mnemonic (_("Use _Anti-aliasing"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (antialias), loadvals.antialias);
gtk_box_pack_start (GTK_BOX (vbox), antialias, FALSE, FALSE, 0);
g_signal_connect (antialias, "toggled",
G_CALLBACK (gimp_toggle_button_update), &loadvals.antialias);
gtk_widget_show (antialias);
/* Setup done; display the dialog */
gtk_widget_show (dialog);
/* run the dialog */
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
loadvals.target =
gimp_page_selector_get_target (GIMP_PAGE_SELECTOR (selector));
pages->pages =
gimp_page_selector_get_selected_pages (GIMP_PAGE_SELECTOR (selector),
&pages->n_pages);
/* select all if none selected */
if (pages->n_pages == 0)
{
gimp_page_selector_select_all (GIMP_PAGE_SELECTOR (selector));
pages->pages =
gimp_page_selector_get_selected_pages (GIMP_PAGE_SELECTOR (selector),
&pages->n_pages);
}
/* cleanup */
thread_data.stop_thumbnailing = TRUE;
g_thread_join (thread);
return run ? GIMP_PDB_SUCCESS : GIMP_PDB_CANCEL;
}
/**
** code for GimpResolutionEntry widget, formerly in libgimpwidgets
**/
static guint gimp_resolution_entry_signals[LAST_SIGNAL] = { 0 };
static GtkGridClass *parent_class = NULL;
GType
gimp_resolution_entry_get_type (void)
{
static GType gre_type = 0;
if (! gre_type)
{
const GTypeInfo gre_info =
{
sizeof (GimpResolutionEntryClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_resolution_entry_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpResolutionEntry),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_resolution_entry_init,
};
gre_type = g_type_register_static (GTK_TYPE_GRID,
"GimpResolutionEntry",
&gre_info, 0);
}
return gre_type;
}
static void
gimp_resolution_entry_class_init (GimpResolutionEntryClass *klass)
{
parent_class = g_type_class_peek_parent (klass);
gimp_resolution_entry_signals[HEIGHT_CHANGED] =
g_signal_new ("height-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpResolutionEntryClass, value_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
gimp_resolution_entry_signals[WIDTH_CHANGED] =
g_signal_new ("width-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpResolutionEntryClass, value_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
gimp_resolution_entry_signals[X_CHANGED] =
g_signal_new ("x-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpResolutionEntryClass, value_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
gimp_resolution_entry_signals[Y_CHANGED] =
g_signal_new ("y-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpResolutionEntryClass, refval_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
gimp_resolution_entry_signals[UNIT_CHANGED] =
g_signal_new ("unit-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpResolutionEntryClass, unit_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
klass->value_changed = NULL;
klass->refval_changed = NULL;
klass->unit_changed = NULL;
}
static void
gimp_resolution_entry_init (GimpResolutionEntry *gre)
{
gre->unitmenu = NULL;
gre->unit = GIMP_UNIT_INCH;
gtk_grid_set_row_spacing (GTK_GRID (gre), 2);
gtk_grid_set_column_spacing (GTK_GRID (gre), 4);
}
static void
gimp_resolution_entry_field_init (GimpResolutionEntry *gre,
GimpResolutionEntryField *gref,
GimpResolutionEntryField *corresponding,
guint changed_signal,
gdouble initial_val,
GimpUnit initial_unit,
gboolean size,
gint spinbutton_width)
{
gint digits;
g_return_if_fail (GIMP_IS_RESOLUTION_ENTRY (gre));
gref->gre = gre;
gref->corresponding = corresponding;
gref->changed_signal = gimp_resolution_entry_signals[changed_signal];
if (size)
{
gref->value = initial_val /
gimp_unit_get_factor (initial_unit) *
corresponding->value *
gimp_unit_get_factor (gre->unit);
gref->phy_size = initial_val /
gimp_unit_get_factor (initial_unit);
}
else
{
gref->value = initial_val;
}
gref->min_value = GIMP_MIN_RESOLUTION;
gref->max_value = GIMP_MAX_RESOLUTION;
gref->adjustment = NULL;
gref->stop_recursion = 0;
gref->size = size;
if (size)
{
gref->label = g_object_new (GTK_TYPE_LABEL,
"xalign", 0.0,
"yalign", 0.5,
NULL);
gimp_label_set_attributes (GTK_LABEL (gref->label),
PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
-1);
gimp_resolution_entry_format_label (gre, gref->label, gref->phy_size);
}
digits = size ? 0 : MIN (gimp_unit_get_digits (initial_unit), 5) + 1;
gref->adjustment = gtk_adjustment_new (gref->value,
gref->min_value,
gref->max_value,
1.0, 10.0, 0.0);
gref->spinbutton = gimp_spin_button_new (gref->adjustment,
1.0, digits);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (gref->spinbutton), TRUE);
if (spinbutton_width > 0)
{
if (spinbutton_width < 17)
gtk_entry_set_width_chars (GTK_ENTRY (gref->spinbutton),
spinbutton_width);
else
gtk_widget_set_size_request (gref->spinbutton,
spinbutton_width, -1);
}
}
/**
* gimp_resolution_entry_new:
* @width_label: Optional label for the width control.
* @width: Width of the item, specified in terms of @size_unit.
* @height_label: Optional label for the height control.
* @height: Height of the item, specified in terms of @size_unit.
* @size_unit: Unit used to specify the width and height.
* @res_label: Optional label for the resolution entry.
* @initial_res: The initial resolution.
* @initial_unit: The initial unit.
*
* Creates a new #GimpResolutionEntry widget.
*
* The #GimpResolutionEntry is derived from #GtkGrid and will have
* an empty border of one cell width on each side plus an empty column left
* of the #GimpUnitMenu to allow the caller to add labels or other widgets.
*
* A #GimpChainButton is displayed if independent is set to %TRUE.
*
* Returns: A pointer to the new #GimpResolutionEntry widget.
**/
GtkWidget *
gimp_resolution_entry_new (const gchar *width_label,
gdouble width,
const gchar *height_label,
gdouble height,
GimpUnit size_unit,
const gchar *res_label,
gdouble initial_res,
GimpUnit initial_unit)
{
GimpResolutionEntry *gre;
GtkTreeModel *model;
gre = g_object_new (GIMP_TYPE_RESOLUTION_ENTRY, NULL);
gre->unit = initial_unit;
gimp_resolution_entry_field_init (gre, &gre->x,
&gre->width,
X_CHANGED,
initial_res, initial_unit,
FALSE, 0);
gtk_grid_attach (GTK_GRID (gre), gre->x.spinbutton, 1, 3, 1, 1);
g_signal_connect (gre->x.adjustment, "value-changed",
G_CALLBACK (gimp_resolution_entry_value_callback),
&gre->x);
gtk_widget_show (gre->x.spinbutton);
gre->unitmenu = gimp_unit_combo_box_new ();
model = gtk_combo_box_get_model (GTK_COMBO_BOX (gre->unitmenu));
gimp_unit_store_set_has_pixels (GIMP_UNIT_STORE (model), FALSE);
gimp_unit_store_set_has_percent (GIMP_UNIT_STORE (model), FALSE);
g_object_set (model,
"short-format", _("pixels/%a"),
"long-format", _("pixels/%a"),
NULL);
gimp_unit_combo_box_set_active (GIMP_UNIT_COMBO_BOX (gre->unitmenu),
initial_unit);
gtk_grid_attach (GTK_GRID (gre), gre->unitmenu, 3, 3, 1, 1);
g_signal_connect (gre->unitmenu, "changed",
G_CALLBACK (gimp_resolution_entry_unit_callback),
gre);
gtk_widget_show (gre->unitmenu);
gimp_resolution_entry_field_init (gre, &gre->width,
&gre->x,
WIDTH_CHANGED,
width, size_unit,
TRUE, 0);
gtk_grid_attach (GTK_GRID (gre), gre->width.spinbutton, 1, 1, 1, 1);
gtk_grid_attach (GTK_GRID (gre), gre->width.label, 3, 1, 1, 1);
g_signal_connect (gre->width.adjustment, "value-changed",
G_CALLBACK (gimp_resolution_entry_value_callback),
&gre->width);
gtk_widget_show (gre->width.spinbutton);
gtk_widget_show (gre->width.label);
gimp_resolution_entry_field_init (gre, &gre->height, &gre->x,
HEIGHT_CHANGED,
height, size_unit,
TRUE, 0);
gtk_grid_attach (GTK_GRID (gre), gre->height.spinbutton, 1, 2, 1, 1);
gtk_grid_attach (GTK_GRID (gre), gre->height.label, 3, 2, 1, 1);
g_signal_connect (gre->height.adjustment, "value-changed",
G_CALLBACK (gimp_resolution_entry_value_callback),
&gre->height);
gtk_widget_show (gre->height.spinbutton);
gtk_widget_show (gre->height.label);
if (width_label)
gimp_resolution_entry_attach_label (gre, width_label, 1, 0, 0.0);
if (height_label)
gimp_resolution_entry_attach_label (gre, height_label, 2, 0, 0.0);
if (res_label)
gimp_resolution_entry_attach_label (gre, res_label, 3, 0, 0.0);
return GTK_WIDGET (gre);
}
/**
* gimp_resolution_entry_attach_label:
* @gre: The #GimpResolutionEntry you want to add a label to.
* @text: The text of the label.
* @row: The row where the label will be attached.
* @column: The column where the label will be attached.
* @alignment: The horizontal alignment of the label.
*
* Attaches a #GtkLabel to the #GimpResolutionEntry (which is a #GtkGrid).
*
* Returns: A pointer to the new #GtkLabel widget.
**/
GtkWidget *
gimp_resolution_entry_attach_label (GimpResolutionEntry *gre,
const gchar *text,
gint row,
gint column,
gfloat alignment)
{
GtkWidget *label;
g_return_val_if_fail (GIMP_IS_RESOLUTION_ENTRY (gre), NULL);
g_return_val_if_fail (text != NULL, NULL);
label = gtk_label_new_with_mnemonic (text);
if (column == 0)
{
GList *children;
GList *list;
children = gtk_container_get_children (GTK_CONTAINER (gre));
for (list = children; list; list = g_list_next (list))
{
GtkWidget *child = list->data;
gint left_attach;
gint top_attach;
gtk_container_child_get (GTK_CONTAINER (gre), child,
"left-attach", &left_attach,
"top-attach", &top_attach,
NULL);
if (left_attach == 1 && top_attach == row)
{
gtk_label_set_mnemonic_widget (GTK_LABEL (label), child);
break;
}
}
g_list_free (children);
}
gtk_label_set_xalign (GTK_LABEL (label), alignment);
gtk_grid_attach (GTK_GRID (gre), label, column, row, 1, 1);
gtk_widget_show (label);
return label;
}
/**
* gimp_resolution_entry_get_x_in_dpi;
* @gre: The #GimpResolutionEntry you want to know the resolution of.
*
* Returns the X resolution of the #GimpResolutionEntry in pixels per inch.
**/
gdouble
gimp_resolution_entry_get_x_in_dpi (GimpResolutionEntry *gre)
{
g_return_val_if_fail (GIMP_IS_RESOLUTION_ENTRY (gre), 0);
/* dots_in_one_unit * units_in_one_inch -> dpi */
return gre->x.value * gimp_unit_get_factor (gre->unit);
}
/**
* gimp_resolution_entry_get_y_in_dpi;
* @gre: The #GimpResolutionEntry you want to know the resolution of.
*
* Returns the Y resolution of the #GimpResolutionEntry in pixels per inch.
**/
gdouble
gimp_resolution_entry_get_y_in_dpi (GimpResolutionEntry *gre)
{
g_return_val_if_fail (GIMP_IS_RESOLUTION_ENTRY (gre), 0);
return gre->y.value * gimp_unit_get_factor (gre->unit);
}
static void
gimp_resolution_entry_update_value (GimpResolutionEntryField *gref,
gdouble value)
{
if (gref->stop_recursion > 0)
return;
gref->value = value;
gref->stop_recursion++;
if (gref->size)
gimp_resolution_entry_update_value (gref->corresponding,
gref->value /
gref->phy_size /
gimp_unit_get_factor (gref->gre->unit));
else
{
gdouble factor = gimp_unit_get_factor (gref->gre->unit);
gimp_resolution_entry_update_value (&gref->gre->width,
gref->value *
gref->gre->width.phy_size *
factor);
gimp_resolution_entry_update_value (&gref->gre->height,
gref->value *
gref->gre->height.phy_size *
factor);
}
gtk_adjustment_set_value (gref->adjustment, value);
gref->stop_recursion--;
g_signal_emit (gref->gre, gref->changed_signal, 0);
}
static void
gimp_resolution_entry_value_callback (GtkAdjustment *adjustment,
gpointer data)
{
GimpResolutionEntryField *gref = (GimpResolutionEntryField *) data;
gdouble new_value;
new_value = gtk_adjustment_get_value (adjustment);
if (gref->value != new_value)
gimp_resolution_entry_update_value (gref, new_value);
}
static void
gimp_resolution_entry_update_unit (GimpResolutionEntry *gre,
GimpUnit unit)
{
GimpUnit old_unit;
gint digits;
gdouble factor;
old_unit = gre->unit;
gre->unit = unit;
digits = (gimp_unit_get_digits (GIMP_UNIT_INCH) -
gimp_unit_get_digits (unit));
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gre->x.spinbutton),
MAX (3 + digits, 3));
factor = gimp_unit_get_factor (old_unit) / gimp_unit_get_factor (unit);
gre->x.min_value *= factor;
gre->x.max_value *= factor;
gre->x.value *= factor;
gtk_adjustment_set_value (gre->x.adjustment, gre->x.value);
gimp_resolution_entry_format_label (gre,
gre->width.label, gre->width.phy_size);
gimp_resolution_entry_format_label (gre,
gre->height.label, gre->height.phy_size);
g_signal_emit (gre, gimp_resolution_entry_signals[UNIT_CHANGED], 0);
}
static void
gimp_resolution_entry_unit_callback (GtkWidget *widget,
GimpResolutionEntry *gre)
{
GimpUnit new_unit;
new_unit = gimp_unit_combo_box_get_active (GIMP_UNIT_COMBO_BOX (widget));
if (gre->unit != new_unit)
gimp_resolution_entry_update_unit (gre, new_unit);
}
/**
* gimp_resolution_entry_update_x_in_dpi:
* @gre: the #GimpResolutionEntry
* @data: a pointer to a gdouble
*
* Convenience function to set a double to the X resolution, suitable
* for use as a signal callback.
*/
void
gimp_resolution_entry_update_x_in_dpi (GimpResolutionEntry *gre,
gpointer data)
{
gdouble *val;
g_return_if_fail (gre != NULL);
g_return_if_fail (data != NULL);
g_return_if_fail (GIMP_IS_RESOLUTION_ENTRY (gre));
val = (gdouble *) data;
*val = gimp_resolution_entry_get_x_in_dpi (gre);
}
/**
* gimp_resolution_entry_update_y_in_dpi:
* @gre: the #GimpResolutionEntry
* @data: a pointer to a gdouble
*
* Convenience function to set a double to the Y resolution, suitable
* for use as a signal callback.
*/
void
gimp_resolution_entry_update_y_in_dpi (GimpResolutionEntry *gre,
gpointer data)
{
gdouble *val;
g_return_if_fail (gre != NULL);
g_return_if_fail (data != NULL);
g_return_if_fail (GIMP_IS_RESOLUTION_ENTRY (gre));
val = (gdouble *) data;
*val = gimp_resolution_entry_get_y_in_dpi (gre);
}
static void
gimp_resolution_entry_format_label (GimpResolutionEntry *gre,
GtkWidget *label,
gdouble size)
{
gchar *format = g_strdup_printf ("%%.%df %%s",
gimp_unit_get_digits (gre->unit));
gchar *text = g_strdup_printf (format,
size * gimp_unit_get_factor (gre->unit),
gimp_unit_get_plural (gre->unit));
g_free (format);
gtk_label_set_text (GTK_LABEL (label), text);
g_free (text);
}
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