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gimp/plug-ins/common/poppler.c

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/* The GIMP -- an image manipulation program
*
* poppler.c - PDF file loader
*
* Copyright (C) 2005 Nathan Summers
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <poppler.h>
#include "libgimp/stdplugins-intl.h"
/* Structs for the load dialog */
typedef struct
{
gdouble resolution;
gboolean antialias;
} PdfLoadVals;
static PdfLoadVals loadvals =
{
100.00, /* 100 dpi */
TRUE /* antialias */
};
typedef struct
{
gint n_pages;
gint *pages;
} PdfSelectedPages;
/* Declare local functions */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (PopplerDocument *doc,
const gchar *filename,
guint32 resolution,
gboolean antialias,
PdfSelectedPages *pages);
static gboolean load_dialog (PopplerDocument *doc,
PdfSelectedPages *pages);
static PopplerDocument * open_document (const gchar *filename);
static GdkPixbuf * get_thumbnail (PopplerDocument *doc,
int page,
int preferred_size);
static gint32 layer_from_pixbuf (gint32 image,
const gchar *layer_name,
gint position,
GdkPixbuf *buf,
gdouble progress_start,
gdouble progress_scale);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
static GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw_filename", "The name entered" },
{ GIMP_PDB_INT32, "resolution", "Resolution to rasterize to (dpi)"},
{ GIMP_PDB_INT32, "antialias", "Whether to antialias"},
{ GIMP_PDB_INT32, "n_pages", "Number of pages to load (0 for all)"},
{ GIMP_PDB_INT32ARRAY,"page", "The pages to load"}
};
static GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static GimpParamDef thumb_args[] =
{
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_INT32, "thumb_size", "Preferred thumbnail size" }
};
static GimpParamDef thumb_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Thumbnail image" },
{ GIMP_PDB_INT32, "image_width", "Width of full-sized image" },
{ GIMP_PDB_INT32, "image_height", "Height of full-sized image" }
};
gimp_install_procedure ("file_pdf_load",
"Load file in PDF format.",
"Load file in PDF format. "
"PDF is a portable document format created by Adobe. "
"It is designed to be easily processed by a variety "
"of different platforms, and is a distant cousin of "
"postscript. ",
"Nathan Summers",
"Nathan Summers",
"2005",
N_("Portable Document Format"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_file_handler_mime ("file_pdf_load", "application/pdf");
gimp_register_magic_load_handler ("file_pdf_load",
"pdf",
"",
"0, string,%PDF-");
gimp_install_procedure ("file_pdf_load_thumb",
"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.",
"Nathan Summers",
"Nathan Summers",
"2005",
NULL,
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (thumb_args),
G_N_ELEMENTS (thumb_return_vals),
thumb_args, thumb_return_vals);
gimp_register_thumbnail_loader ("file_pdf_load", "file_pdf_load_thumb");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image_ID = -1;
PopplerDocument *doc = NULL;
run_mode = param[0].data.d_int32;
INIT_I18N ();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (! g_thread_supported ())
g_thread_init (NULL);
if (strcmp (name, "file_pdf_load") == 0)
{
PdfSelectedPages *pages = g_new (PdfSelectedPages, 1);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve last settings */
gimp_get_data ("file_pdf_load", &loadvals);
doc = open_document (param[1].data.d_string);
if (!doc)
{
status = GIMP_PDB_EXECUTION_ERROR;
break;
}
if (load_dialog (doc, pages))
gimp_set_data ("file_pdf_load", &loadvals, sizeof(loadvals));
else
status = GIMP_PDB_CANCEL;
break;
case GIMP_RUN_WITH_LAST_VALS:
case GIMP_RUN_NONINTERACTIVE:
/* bah! hardly any file plugins work non-interactively.
* why should we? */
status = GIMP_PDB_EXECUTION_ERROR;
break;
}
if (status == GIMP_PDB_SUCCESS)
{
image_ID = load_image (doc, param[1].data.d_string,
loadvals.resolution,
loadvals.antialias,
pages);
if (image_ID != -1)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (doc)
g_object_unref (doc);
g_free (pages->pages);
g_free (pages);
}
else if (strcmp (name, "file_pdf_load_thumb") == 0)
{
if (nparams < 2)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
gdouble width = 0;
gdouble height = 0;
gdouble scale;
gint32 image = -1;
GdkPixbuf *buf = NULL;
/* Possibly retrieve last settings */
gimp_get_data ("file_pdf_load", &loadvals);
doc = open_document (param[0].data.d_string);
if (doc)
{
PopplerPage *page = poppler_document_get_page (doc, 0);
if (page)
{
poppler_page_get_size (page, &width, &height);
g_object_unref (page);
}
buf = get_thumbnail (doc, 0, param[1].data.d_int32);
}
if (buf)
{
image = gimp_image_new (gdk_pixbuf_get_width (buf),
gdk_pixbuf_get_height (buf),
GIMP_RGB);
layer_from_pixbuf (image, "thumbnail", 0, buf, 0.0, 1.0);
}
scale = loadvals.resolution /
gimp_unit_get_factor (GIMP_UNIT_POINT);
width *= scale;
height *= scale;
if (doc)
g_object_unref (doc);
if (buf)
g_object_unref (buf);
if (image != -1)
{
*nreturn_vals = 4;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image;
values[2].type = GIMP_PDB_INT32;
values[2].data.d_int32 = width;
values[3].type = GIMP_PDB_INT32;
values[3].data.d_int32 = height;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].data.d_status = status;
}
static PopplerDocument*
open_document (const gchar *filename)
{
PopplerDocument *doc;
GError *err = NULL;
gchar *uri;
uri = g_filename_to_uri (filename, NULL, &err);
if (err)
{
g_warning ("Could not convert '%s' to an URI: %s",
gimp_filename_to_utf8 (filename),
err->message);
return NULL;
}
doc = poppler_document_new_from_file (uri, NULL, &err);
g_free (uri);
if (err)
{
g_message (_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename),
err->message);
return NULL;
}
return doc;
}
static gint32
layer_from_pixbuf (gint32 image,
const gchar *layer_name,
gint position,
GdkPixbuf *buf,
gdouble progress_start,
gdouble progress_scale)
{
gint32 layer;
GimpPixelRgn rgn;
gpointer pr;
GimpDrawable *drawable;
gint width;
gint height;
gint rowstride;
gint bpp;
gchar *pixels;
gdouble progress = 0;
g_return_val_if_fail (buf != NULL, -1);
width = gdk_pixbuf_get_width (buf);
height = gdk_pixbuf_get_height (buf);
rowstride = gdk_pixbuf_get_rowstride (buf);
bpp = gdk_pixbuf_get_n_channels (buf);
pixels = gdk_pixbuf_get_pixels (buf);
layer = gimp_layer_new (image, layer_name,
width, height,
GIMP_RGB_IMAGE, 100.0, GIMP_NORMAL_MODE);
gimp_image_add_layer (image, layer, position);
drawable = gimp_drawable_get (layer);
gimp_pixel_rgn_init (&rgn, drawable, 0, 0, width, height, TRUE, FALSE);
for (pr = gimp_pixel_rgns_register (1, &rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src;
guchar *dest;
gint y;
src = pixels + rgn.y * rowstride + rgn.x * bpp;
dest = rgn.data;
for (y = 0; y < rgn.h; y++)
{
memcpy (dest, src, rgn.w * rgn.bpp);
src += rowstride;
dest += rgn.rowstride;
}
progress += (double) (rgn.h * rgn.w) / (height * width);
gimp_progress_update (progress_start + progress * progress_scale);
}
gimp_drawable_detach (drawable);
return layer;
}
static gint32
load_image (PopplerDocument *doc,
const gchar *filename,
guint32 resolution,
gboolean antialias,
PdfSelectedPages *pages)
{
gint32 image = 0;
double scale;
PopplerPage *page;
gchar *page_label;
int i;
double page_width;
double page_height;
GdkPixbuf *buf;
gint width;
gint height;
double doc_progress = 0;
gimp_progress_init (NULL);
gimp_progress_set_text (_("Opening '%s'..."),
gimp_filename_to_utf8 (filename));
scale = resolution / gimp_unit_get_factor (GIMP_UNIT_POINT);
/* read the file */
#if 0
poppler_set_antialias (antialias);
#endif
for (i = 0; i < pages->n_pages; i++)
{
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;
if (!image)
{
image = gimp_image_new (width, height, GIMP_RGB);
gimp_image_set_filename (image, filename);
gimp_image_set_resolution (image, resolution, resolution);
}
buf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
poppler_page_render_to_pixbuf (page, 0, 0,
width, height,
scale,
buf,
0, 0);
g_object_get (G_OBJECT (page), "label", &page_label, NULL);
layer_from_pixbuf (image, page_label, i, buf,
doc_progress, 1.0 / pages->n_pages);
g_free (page_label);
doc_progress = (double) (i + 1) / pages->n_pages;
gimp_progress_update (doc_progress);
g_object_unref (buf);
}
return image;
}
static GdkPixbuf *
get_thumbnail (PopplerDocument *doc,
int page_num,
int preferred_size)
{
PopplerPage *page;
GdkPixbuf *pixbuf;
page = poppler_document_get_page (doc, page_num);
if (! page)
return NULL;
pixbuf = poppler_page_get_thumbnail (page);
if (! pixbuf)
{
double width, height, scale;
poppler_page_get_size (page, &width, &height);
scale = (double) preferred_size / MAX (width, height);
width *= scale;
height *= scale;
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
width, height);
poppler_page_render_to_pixbuf (page, 0, 0,
width, height,
scale,
pixbuf,
0, 0);
}
g_object_unref (page);
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_thumbnail (thread_data->document, i, 128);
g_idle_add (idle_set_thumbnail, idle_data);
if (thread_data->stop_thumbnailing)
break;
}
return NULL;
}
static gboolean
load_dialog (PopplerDocument *doc,
PdfSelectedPages *pages)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkWidget *title;
GtkWidget *selector;
GtkWidget *resolution;
GtkWidget *toggle;
GtkWidget *hbox;
ThreadData thread_data;
GThread *thread;
gint i;
gint n_pages;
gdouble width;
gdouble height;
gboolean run;
gimp_ui_init ("file-pdf-load", FALSE);
dialog = gimp_dialog_new (_("Load PDF"), "pdf",
NULL, 0,
gimp_standard_help_func, "file-pdf-load",
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), vbox);
gtk_widget_show (vbox);
/* Title */
title = gimp_prop_label_new (G_OBJECT (doc), "title");
gtk_box_pack_start (GTK_BOX (vbox), title, FALSE, FALSE, 0);
gtk_widget_show (title);
/* Page Selector */
selector = gimp_page_selector_new ();
gtk_box_pack_start (GTK_BOX (vbox), selector, TRUE, TRUE, 0);
n_pages = poppler_document_get_n_pages (doc);
gimp_page_selector_set_n_pages (GIMP_PAGE_SELECTOR (selector), n_pages);
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);
}
gtk_widget_show (selector);
thread_data.document = doc;
thread_data.selector = GIMP_PAGE_SELECTOR (selector);
thread_data.stop_thumbnailing = FALSE;
thread = g_thread_create (thumbnail_thread, &thread_data, TRUE, NULL);
/* Resolution */
hbox = gtk_hbox_new (FALSE, 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,
_("_Resolution:"), loadvals.resolution,
GIMP_UNIT_INCH,
FALSE,
0);
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 */
toggle = gtk_check_button_new_with_mnemonic (_("A_ntialiasing"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), loadvals.antialias);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&loadvals.antialias);
/* Setup done; display the dialog */
gtk_widget_show (dialog);
/* run the dialog */
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
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;
}
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