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gimp/plug-ins/common/file-pdf-save.c

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/* GIMP - The GNU Image Manipulation Program
*
* file-pdf-save.c - PDF file exporter, based on the cairo PDF surface
*
* Copyright (C) 2010 Barak Itkin <lightningismyname@gmail.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
/* The PDF export plugin has 3 main procedures:
* 1. file-pdf-save
* This is the main procedure. It has 3 options for optimizations of
* the pdf file, and it can show a gui. This procedure works on a single
* image.
* 2. file-pdf-save-defaults
* This procedures is the one that will be invoked by gimp's file-save,
* when the pdf extension is chosen. If it's in RUN_INTERACTIVE, it will
* pop a user interface with more options, like file-pdf-save. If it's in
* RUN_NONINTERACTIVE, it will simply use the default values. Note that on
* RUN_WITH_LAST_VALS there will be no gui, however the values will be the
* ones that were used in the last interactive run (or the defaults if none
* are available.
* 3. file-pdf-save-multi
* This procedures is more advanced, and it allows the creation of multiple
* paged pdf files. It will be located in File/Create/Multiple page PDF...
*
* It was suggested that file-pdf-save-multi will be removed from the UI as it
* does not match the product vision (GIMP isn't a program for editing multiple
* paged documents).
*/
/* Known Issues (except for the coding style issues):
* 1. Grayscale layers are inverted (although layer masks which are not grayscale,
* are not inverted)
* 2. Exporting some fonts doesn't work since gimp_text_layer_get_font Returns a
* font which is sometimes incompatiable with pango_font_description_from_string
* (gimp_text_layer_get_font sometimes returns suffixes such as "semi-expanded" to
* the font's name although the GIMP's font selection dialog shows the don'ts name
* normally - This should be checked again in GIMP 2.7)
* 3. Indexed layers can't be optimized yet (Since gimp_histogram won't work on
* indexed layers)
* 4. Rendering the pango layout requires multiplying the size in PANGO_SCALE. This
* means I'll need to do some hacking on the markup returned from GIMP.
* 5. When accessing the contents of layer groups is supported, we should do use it
* (since this plugin should preserve layers).
*
* Also, there are 2 things which we should warn the user about:
* 1. Cairo does not support bitmap masks for text.
* 2. Currently layer modes are ignored. We do support layers, including
* transparency and opacity, but layer modes are not supported.
*/
/* Changelog
*
* April 29, 2009 | Barak Itkin <lightningismyname@gmail.com>
* First version of the plugin. This is only a proof of concept and not a full
* working plugin.
*
* May 6, 2009 Barak | Itkin <lightningismyname@gmail.com>
* Added new features and several bugfixes:
* - Added handling for image resolutions
* - fixed the behaviour of getting font sizes
* - Added various optimizations (solid rectangles instead of bitmaps, ignoring
* invisible layers, etc.) as a macro flag.
* - Added handling for layer masks, use CAIRO_FORMAT_A8 for grayscale drawables.
* - Indexed layers are now supported
*
* August 17, 2009 | Barak Itkin <lightningismyname@gmail.com>
* Most of the plugin was rewritten from scratch and it now has several new
* features:
* - Got rid of the optimization macros in the code. The gui now supports
* selecting which optimizations to apply.
* - Added a procedure to allow the creation of multiple paged PDF's
* - Registered the plugin on "<Image>/File/Create/PDF"
*
* August 21, 2009 | Barak Itkin <lightningismyname@gmail.com>
* Fixed a typo that prevented the plugin from compiling...
* A migration to the new GIMP 2.8 api, which includes:
* - Now using gimp_export_dialog_new
* - Using gimp_text_layer_get_hint_style (2.8) instead of the depreceated
* gimp_text_layer_get_hinting (2.6).
*
* August 24, 2010 | Barak Itkin <lightningismyname@gmail.com>
* More migrations to the new GIMP 2.8 api:
* - Now using the GimpItem api
* - Using gimp_text_layer_get_markup where possible
* - Fixed some compiler warnings
* Also merged the header and c file into one file, Updated some of the comments
* and documentation, and moved this into the main source repository.
*/
#include "config.h"
#include <glib/gstdio.h>
#include <cairo-pdf.h>
#include <pango/pangocairo.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define SAVE_PROC "file-pdf-save"
#define SAVE_MULTI_PROC "file-pdf-save-multi"
#define PLUG_IN_BINARY "file-pdf-save"
#define PLUG_IN_ROLE "gimp-file-pdf-save"
#define DATA_OPTIMIZE "file-pdf-data-optimize"
#define DATA_IMAGE_LIST "file-pdf-data-multi-page"
/* Gimp will crash before you reach this limitation :D */
#define MAX_PAGE_COUNT 350
#define MAX_FILE_NAME_LENGTH 350
#define THUMB_WIDTH 90
#define THUMB_HEIGHT 120
typedef enum
{
SA_RUN_MODE,
SA_IMAGE,
SA_DRAWABLE,
SA_FILENAME,
SA_RAW_FILENAME,
SA_VECTORIZE,
SA_IGNORE_HIDDEN,
SA_APPLY_MASKS,
SA_ARG_COUNT
} SaveArgs;
#define SA_ARG_COUNT_DEFAULT 5
typedef enum
{
SMA_RUN_MODE,
SMA_IMAGES,
SMA_COUNT,
SMA_VECTORIZE,
SMA_IGNORE_HIDDEN,
SMA_APPLY_MASKS,
SMA_FILENAME,
SMA_RAWFILENAME,
SMA_ARG_COUNT
} SaveMultiArgs;
typedef struct
{
gboolean vectorize;
gboolean ignore_hidden;
gboolean apply_masks;
} PdfOptimize;
typedef struct
{
gint32 images[MAX_PAGE_COUNT];
guint32 image_count;
gchar file_name[MAX_FILE_NAME_LENGTH];
} PdfMultiPage;
typedef struct
{
PdfOptimize optimize;
GArray *images;
} PdfMultiVals;
enum
{
THUMB,
PAGE_NUMBER,
IMAGE_NAME,
IMAGE_ID
};
typedef struct
{
GdkPixbuf *thumb;
gint32 page_number;
gchar *image_name;
} Page;
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gboolean init_vals (const gchar *name,
gint nparams,
const GimpParam *param,
gboolean *single,
gboolean *defaults,
GimpRunMode *run_mode);
static void init_image_list_defaults (gint32 image);
static void validate_image_list (void);
static gboolean gui_single (void);
static gboolean gui_multi (void);
static void choose_file_call (GtkWidget *browse_button,
gpointer file_entry);
static gboolean get_image_list (void);
static GtkTreeModel * create_model (void);
static void add_image_call (GtkWidget *widget,
gpointer img_combo);
static void del_image_call (GtkWidget *widget,
gpointer icon_view);
static void remove_call (GtkTreeModel *tree_model,
GtkTreePath *path,
gpointer user_data);
static void recount_pages (void);
static cairo_surface_t * get_drawable_image (gint32 drawable_ID);
static GimpRGB get_layer_color (gint32 layer_ID,
gboolean *single);
static void drawText (gint32 text_id,
gdouble opacity,
cairo_t *cr,
gdouble x_res,
gdouble y_res);
static gboolean dnd_remove = TRUE;
static PdfMultiPage multi_page;
static PdfOptimize optimize =
{
TRUE, /* vectorize */
TRUE, /* ignore_hidden */
TRUE /* apply_masks */
};
static GtkTreeModel *model;
static GtkWidget *file_choose;
static gchar *file_name;
GimpPlugInInfo PLUG_IN_INFO =
{
NULL,
NULL,
query,
run
};
MAIN()
static void
query (void)
{
static GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "Run mode" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to save the image in" },
{ GIMP_PDB_INT32, "vectorize", "Convert bitmaps to vector graphics where possible. TRUE or FALSE" },
{ GIMP_PDB_INT32, "ignore-hidden","Omit hidden layers and layers with zero opacity. TRUE or FALSE" },
{ GIMP_PDB_INT32, "apply-masks", "Apply layer masks before saving. TRUE or FALSE (Keeping them will not change the output)" }
};
static GimpParamDef save_multi_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "Run mode" },
{ GIMP_PDB_INT32ARRAY, "images", "Input image for each page (An image can appear more than once)" },
{ GIMP_PDB_INT32, "count", "The amount of images entered (This will be the amount of pages). 1 <= count <= MAX_PAGE_COUNT" },
{ GIMP_PDB_INT32, "vectorize", "Convert bitmaps to vector graphics where possible. TRUE or FALSE" },
{ GIMP_PDB_INT32, "ignore-hidden","Omit hidden layers and layers with zero opacity. TRUE or FALSE" },
{ GIMP_PDB_INT32, "apply-masks", "Apply layer masks before saving. TRUE or FALSE (Keeping them will not change the output)" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to save the image in" }
};
gimp_install_procedure (SAVE_PROC,
"Save files in PDF format",
"Saves 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.",
"Barak Itkin",
"Copyright Barak Itkin",
"August 2009",
N_("Portable Document Format"),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_install_procedure (SAVE_MULTI_PROC,
"Save files in PDF format",
"Saves 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.",
"Barak Itkin",
"Copyright Barak Itkin",
"August 2009",
N_("_Create multipage PDF..."),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_multi_args), 0,
save_multi_args, NULL);
#if 0
gimp_plugin_menu_register (SAVE_MULTI_PROC,
"<Image>/File/Create/PDF");
#endif
gimp_register_file_handler_mime (SAVE_PROC, "application/pdf");
gimp_register_save_handler (SAVE_PROC, "pdf", "");
}
static cairo_status_t
write_func (void *fp,
const unsigned char *data,
unsigned int size)
{
return fwrite (data, 1, size, fp) == size ? CAIRO_STATUS_SUCCESS
: CAIRO_STATUS_WRITE_ERROR;
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRunMode run_mode;
gboolean single_image;
gboolean defaults_proc;
cairo_surface_t *pdf_file;
cairo_t *cr;
GimpExportCapabilities capabilities;
FILE *fp;
gint i;
INIT_I18N ();
/* Setting mandatory output values */
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
/* Initializing all the settings */
multi_page.image_count = 0;
if (! init_vals (name, nparams, param, &single_image,
&defaults_proc, &run_mode))
{
values[0].data.d_status = GIMP_PDB_CALLING_ERROR;
return;
}
/* Starting the executions */
if (run_mode == GIMP_RUN_INTERACTIVE)
{
if (single_image)
{
if (! gui_single ())
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
}
else if (! gui_multi ())
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
if (file_name == NULL)
{
values[0].data.d_status = GIMP_PDB_CALLING_ERROR;
gimp_message (_("You must select a file to save!"));
return;
}
}
fp = g_fopen (file_name, "wb");
pdf_file = cairo_pdf_surface_create_for_stream (write_func, fp, 1, 1);
if (cairo_surface_status (pdf_file) != CAIRO_STATUS_SUCCESS)
{
g_message (_("An error occured while creating the PDF file:\n"
"%s\n"
"Make sure you entered a valid filename and that the "
"selected location isn't read only!"),
cairo_status_to_string (cairo_surface_status (pdf_file)));
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
return;
}
cr = cairo_create (pdf_file);
capabilities = (GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_ALPHA |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_LAYERS |
GIMP_EXPORT_CAN_HANDLE_INDEXED);
if (optimize.apply_masks)
capabilities |= GIMP_EXPORT_CAN_HANDLE_LAYER_MASKS;
for (i = 0; i < multi_page.image_count; i++)
{
gint32 image_ID = multi_page.images[i];
gboolean exported;
gint32 *layers;
gint32 n_layers;
gdouble x_res, y_res;
gdouble x_scale, y_scale;
gint32 temp;
gint j;
temp = gimp_image_get_active_drawable (image_ID);
if (temp < 1)
continue;
/* Save the state of the surface before any changes, so that
* settings from one page won't affect all the others
*/
cairo_save (cr);
if (gimp_export_image (&image_ID, &temp, NULL,
capabilities) == GIMP_EXPORT_EXPORT)
{
exported = TRUE;
}
else
{
exported = FALSE;
}
gimp_image_get_resolution (image_ID, &x_res, &y_res);
x_scale = 72.0 / x_res;
y_scale = 72.0 / y_res;
cairo_pdf_surface_set_size (pdf_file,
gimp_image_width (image_ID) * x_scale,
gimp_image_height (image_ID) * y_scale);
/* This way we set how many pixels are there in every inch.
* It's very important for PangoCairo
*/
cairo_surface_set_fallback_resolution (pdf_file, x_res, y_res);
/* PDF is usually 72 points per inch. If we have a different resolution,
* we will need this to fit our drawings
*/
cairo_scale (cr, x_scale, y_scale);
/* Now, we should loop over the layers of each image */
layers = gimp_image_get_layers (image_ID, &n_layers);
for (j = 0; j < n_layers; j++)
{
gint32 layer_ID = layers [n_layers - j - 1];
gint32 mask_ID = -1;
cairo_surface_t *mask_image = NULL;
gdouble opacity;
gboolean single_color;
gint x, y;
opacity = gimp_layer_get_opacity (layer_ID) / 100.0;
if (gimp_item_get_visible (layer_ID) &&
(! optimize.ignore_hidden ||
(optimize.ignore_hidden && opacity > 0.0)))
{
mask_ID = gimp_layer_get_mask (layer_ID);
if (mask_ID != -1)
mask_image = get_drawable_image (mask_ID);
gimp_drawable_offsets (layer_ID, &x, &y);
if (! gimp_item_is_text_layer (layer_ID))
{
/* For raster layers */
GimpRGB layer_color;
layer_color = get_layer_color (layer_ID, &single_color);
cairo_rectangle (cr, x, y,
gimp_drawable_width (layer_ID),
gimp_drawable_height (layer_ID));
if (optimize.vectorize && single_color)
{
cairo_set_source_rgba (cr,
layer_color.r,
layer_color.g,
layer_color.b,
layer_color.a * opacity);
if (mask_ID != -1)
cairo_mask_surface (cr, mask_image, x, y);
else
cairo_fill (cr);
}
else
{
cairo_surface_t *layer_image;
layer_image = get_drawable_image (layer_ID);
cairo_clip (cr);
cairo_set_source_surface (cr, layer_image, x, y);
cairo_push_group (cr);
cairo_paint_with_alpha (cr, opacity);
cairo_pop_group_to_source (cr);
if (mask_ID != -1)
cairo_mask_surface (cr, mask_image, x, y);
else
cairo_paint (cr);
cairo_reset_clip (cr);
cairo_surface_destroy (layer_image);
}
}
else
{
/* For text layers */
drawText (layer_ID, opacity, cr, x_res, y_res);
}
}
/* We are done with the layer - time to free some resources */
if (mask_ID != -1)
cairo_surface_destroy (mask_image);
}
/* We are done with this image - Show it! */
cairo_show_page (cr);
cairo_restore (cr);
if (exported)
gimp_image_delete (image_ID);
}
/* We are done with all the images - time to free the resources */
cairo_surface_destroy (pdf_file);
cairo_destroy (cr);
fclose (fp);
/* Finally done, let's save the parameters */
gimp_set_data (DATA_OPTIMIZE, &optimize, sizeof (optimize));
if (! single_image)
{
g_strlcpy (multi_page.file_name, file_name, MAX_FILE_NAME_LENGTH);
gimp_set_data (DATA_IMAGE_LIST, &multi_page, sizeof (multi_page));
}
}
/******************************************************/
/* Begining of parameter handling functions */
/******************************************************/
/* A function that takes care of loading the basic parameters
*/
static gboolean
init_vals (const gchar *name,
gint nparams,
const GimpParam *param,
gboolean *single_image,
gboolean *defaults_proc,
GimpRunMode *run_mode)
{
gboolean had_saved_list = FALSE;
gboolean single;
gboolean defaults = FALSE;
gint32 i;
gint32 image;
if (g_str_equal (name, SAVE_PROC))
{
single = TRUE;
if (nparams != SA_ARG_COUNT && nparams != SA_ARG_COUNT_DEFAULT)
return FALSE;
*run_mode = param[SA_RUN_MODE].data.d_int32;
image = param[SA_IMAGE].data.d_int32;
file_name = param[SA_FILENAME].data.d_string;
if (nparams == SA_ARG_COUNT)
{
optimize.apply_masks = param[SA_APPLY_MASKS].data.d_int32;
optimize.vectorize = param[SA_VECTORIZE].data.d_int32;
optimize.ignore_hidden = param[SA_IGNORE_HIDDEN].data.d_int32;
}
else
defaults = TRUE;
}
else if (g_str_equal (name, SAVE_MULTI_PROC))
{
single = FALSE;
if (nparams != SMA_ARG_COUNT)
return FALSE;
*run_mode = param[SMA_RUN_MODE].data.d_int32;
image = -1;
file_name = param[SA_FILENAME].data.d_string;
optimize.apply_masks = param[SMA_APPLY_MASKS].data.d_int32;
optimize.vectorize = param[SMA_VECTORIZE].data.d_int32;
optimize.ignore_hidden = param[SMA_IGNORE_HIDDEN].data.d_int32;
}
else
return FALSE;
switch (*run_mode)
{
case GIMP_RUN_NONINTERACTIVE:
if (single)
{
init_image_list_defaults (image);
}
else
{
multi_page.image_count = param[SMA_COUNT].data.d_int32;
if (param[SMA_IMAGES].data.d_int32array != NULL)
for (i = 0; i < param[SMA_COUNT].data.d_int32; i++)
multi_page.images[i] = param[SMA_IMAGES].data.d_int32array[i];
}
break;
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (DATA_OPTIMIZE, &optimize);
had_saved_list = gimp_get_data (DATA_IMAGE_LIST, &multi_page);
if (had_saved_list && (file_name == NULL || strlen (file_name) == 0))
{
file_name = multi_page.file_name;
}
if (single || ! had_saved_list )
init_image_list_defaults (image);
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
if (! single)
{
had_saved_list = gimp_get_data (DATA_IMAGE_LIST, &multi_page);
if (had_saved_list)
{
file_name = multi_page.file_name;
}
}
else
{
init_image_list_defaults (image);
}
gimp_get_data (DATA_OPTIMIZE, &optimize);
break;
}
*defaults_proc = defaults;
*single_image = single;
validate_image_list ();
return TRUE;
}
/* A function that initializes the image list to default values */
static void
init_image_list_defaults (gint32 image)
{
if (image != -1)
{
multi_page.images[0] = image;
multi_page.image_count = 1;
}
else
{
multi_page.image_count = 0;
}
}
/* A function that removes images that are no longer valid from the
* image list
*/
static void
validate_image_list (void)
{
gint32 valid = 0;
guint32 i = 0;
for (i = 0 ; i < MAX_PAGE_COUNT && i < multi_page.image_count ; i++)
{
if (gimp_image_is_valid (multi_page.images[i]))
{
multi_page.images[valid] = multi_page.images[i];
valid++;
}
}
multi_page.image_count = valid;
}
/******************************************************/
/* Begining of GUI functions */
/******************************************************/
/* The main GUI function for saving single-paged PDFs */
static gboolean
gui_single (void)
{
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *vectorize_c;
GtkWidget *ignore_hidden_c;
GtkWidget *apply_c;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
window = gimp_export_dialog_new ("PDF", PLUG_IN_ROLE, SAVE_PROC);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (window)),
vbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (window), 12);
ignore_hidden_c = gtk_check_button_new_with_label (_("Omit hidden layers and layers with zero opacity"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (ignore_hidden_c),
optimize.ignore_hidden);
gtk_box_pack_end (GTK_BOX (vbox), ignore_hidden_c, TRUE, TRUE, 0);
vectorize_c = gtk_check_button_new_with_label (_("Convert bitmaps to vector graphics where possible"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (vectorize_c),
optimize.vectorize);
gtk_box_pack_end (GTK_BOX (vbox), vectorize_c, TRUE, TRUE, 0);
apply_c = gtk_check_button_new_with_label (_("Apply layer masks before saving"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (apply_c),
optimize.apply_masks);
gtk_box_pack_end (GTK_BOX (vbox), apply_c, TRUE, TRUE, 0);
gimp_help_set_help_data (apply_c, _("Keeping the masks will not change the output"), NULL);
gtk_widget_show_all (window);
run = gtk_dialog_run (GTK_DIALOG (window)) == GTK_RESPONSE_OK;
optimize.ignore_hidden =
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (ignore_hidden_c));
optimize.vectorize =
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (vectorize_c));
optimize.apply_masks =
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (apply_c));
gtk_widget_destroy (window);
return run;
}
/* The main GUI function for saving multi-paged PDFs */
static gboolean
gui_multi (void)
{
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *file_label;
GtkWidget *file_entry;
GtkWidget *file_browse;
GtkWidget *file_hbox;
GtkWidget *vectorize_c;
GtkWidget *ignore_hidden_c;
GtkWidget *apply_c;
GtkWidget *scroll;
GtkWidget *page_view;
GtkWidget *h_but_box;
GtkWidget *del;
GtkWidget *h_box;
GtkWidget *img_combo;
GtkWidget *add_image;
gboolean run;
const gchar *temp;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
window = gimp_export_dialog_new ("PDF", PLUG_IN_ROLE, SAVE_MULTI_PROC);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (window)),
vbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (window), 12);
file_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 5);
file_label = gtk_label_new (_("Save to:"));
file_entry = gtk_entry_new ();
if (file_name != NULL)
gtk_entry_set_text (GTK_ENTRY (file_entry), file_name);
file_browse = gtk_button_new_with_label (_("Browse..."));
file_choose = gtk_file_chooser_dialog_new (_("Multipage PDF export"),
GTK_WINDOW (window), GTK_FILE_CHOOSER_ACTION_SAVE,
"gtk-save", GTK_RESPONSE_OK,
"gtk-cancel", GTK_RESPONSE_CANCEL,
NULL);
gtk_box_pack_start (GTK_BOX (file_hbox), file_label, FALSE, FALSE, 0);
gtk_box_pack_start (GTK_BOX (file_hbox), file_entry, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (file_hbox), file_browse, FALSE, FALSE, 0);
gtk_box_pack_start (GTK_BOX (vbox), file_hbox, TRUE, TRUE, 0);
page_view = gtk_icon_view_new ();
model = create_model ();
gtk_icon_view_set_model (GTK_ICON_VIEW (page_view), model);
gtk_icon_view_set_reorderable (GTK_ICON_VIEW (page_view), TRUE);
gtk_icon_view_set_selection_mode (GTK_ICON_VIEW (page_view),
GTK_SELECTION_MULTIPLE);
gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (page_view), THUMB);
gtk_icon_view_set_text_column (GTK_ICON_VIEW (page_view), PAGE_NUMBER);
gtk_icon_view_set_tooltip_column (GTK_ICON_VIEW (page_view), IMAGE_NAME);
scroll = gtk_scrolled_window_new (NULL, NULL);
gtk_widget_set_size_request (scroll, -1, 300);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll),
GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
gtk_container_add (GTK_CONTAINER (scroll), page_view);
gtk_box_pack_start (GTK_BOX (vbox), scroll, TRUE, TRUE, 0);
h_but_box = gtk_button_box_new (GTK_ORIENTATION_HORIZONTAL);
gtk_button_box_set_layout (GTK_BUTTON_BOX (h_but_box), GTK_BUTTONBOX_START);
del = gtk_button_new_with_label (_("Remove the selected pages"));
gtk_box_pack_start (GTK_BOX (h_but_box), del, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (vbox), h_but_box, FALSE, FALSE, 0);
h_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 5);
img_combo = gimp_image_combo_box_new (NULL, NULL);
gtk_box_pack_start (GTK_BOX (h_box), img_combo, FALSE, FALSE, 0);
add_image = gtk_button_new_with_label (_("Add this image"));
gtk_box_pack_start (GTK_BOX (h_box), add_image, FALSE, FALSE, 0);
gtk_box_pack_start (GTK_BOX (vbox), h_box, FALSE, FALSE, 0);
ignore_hidden_c = gtk_check_button_new_with_label (_("Omit hidden layers and layers with zero opacity"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (ignore_hidden_c),
optimize.ignore_hidden);
gtk_box_pack_end (GTK_BOX (vbox), ignore_hidden_c, FALSE, FALSE, 0);
vectorize_c = gtk_check_button_new_with_label (_("Convert bitmaps to vector graphics where possible"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (vectorize_c),
optimize.vectorize);
gtk_box_pack_end (GTK_BOX (vbox), vectorize_c, FALSE, FALSE, 0);
apply_c = gtk_check_button_new_with_label (_("Apply layer masks before saving"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (apply_c),
optimize.apply_masks);
gtk_box_pack_end (GTK_BOX (vbox), apply_c, FALSE, FALSE, 0);
gimp_help_set_help_data (apply_c, _("Keeping the masks will not change the output"), NULL);
gtk_widget_show_all (window);
g_signal_connect (G_OBJECT (file_browse), "clicked",
G_CALLBACK (choose_file_call),
file_entry);
g_signal_connect (G_OBJECT (add_image), "clicked",
G_CALLBACK (add_image_call),
img_combo);
g_signal_connect (G_OBJECT (del), "clicked",
G_CALLBACK (del_image_call),
page_view);
g_signal_connect (G_OBJECT (model), "row-deleted",
G_CALLBACK (remove_call),
NULL);
run = gtk_dialog_run (GTK_DIALOG (window)) == GTK_RESPONSE_OK;
run &= get_image_list ();
temp = gtk_entry_get_text (GTK_ENTRY (file_entry));
g_stpcpy (file_name, temp);
optimize.ignore_hidden =
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (ignore_hidden_c));
optimize.vectorize =
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (vectorize_c));
optimize.apply_masks =
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (apply_c));
gtk_widget_destroy (window);
return run;
}
/* A function that is called when the button for browsing for file
* locations was clicked
*/
static void
choose_file_call (GtkWidget *browse_button,
gpointer file_entry)
{
GFile *file = g_file_new_for_path (gtk_entry_get_text (GTK_ENTRY (file_entry)));
gtk_file_chooser_set_uri (GTK_FILE_CHOOSER (file_choose),
g_file_get_uri (file));
if (gtk_dialog_run (GTK_DIALOG (file_choose)) == GTK_RESPONSE_OK)
{
file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (file_choose));
gtk_entry_set_text (GTK_ENTRY (file_entry), g_file_get_path (file));
}
file_name = g_file_get_path (file);
gtk_widget_hide (file_choose);
}
/* A function to create the basic GtkTreeModel for the icon view */
static GtkTreeModel*
create_model (void)
{
GtkListStore *model;
guint32 i;
/* validate_image_list was called earlier, so all the images
* up to multi_page.image_count are valid
*/
model = gtk_list_store_new (4,
GDK_TYPE_PIXBUF, /* THUMB */
G_TYPE_STRING, /* PAGE_NUMBER */
G_TYPE_STRING, /* IMAGE_NAME */
G_TYPE_INT); /* IMAGE_ID */
for (i = 0 ; i < multi_page.image_count && i < MAX_PAGE_COUNT ; i++)
{
GtkTreeIter iter;
gint32 image = multi_page.images[i];
GdkPixbuf *pixbuf;
pixbuf = gimp_image_get_thumbnail (image, THUMB_WIDTH, THUMB_HEIGHT,
GIMP_PIXBUF_SMALL_CHECKS);
gtk_list_store_append (model, &iter);
gtk_list_store_set (model, &iter,
THUMB, pixbuf,
PAGE_NUMBER, g_strdup_printf (_("Page %d"), i + 1),
IMAGE_NAME, gimp_image_get_name (image),
IMAGE_ID, image,
-1);
g_object_unref (pixbuf);
}
return GTK_TREE_MODEL (model);
}
/* A function that puts the images from the model inside the images
* (pages) array
*/
static gboolean
get_image_list (void)
{
GtkTreeIter iter;
gboolean valid;
multi_page.image_count = 0;
for (valid = gtk_tree_model_get_iter_first (model, &iter);
valid;
valid = gtk_tree_model_iter_next (model, &iter))
{
gint32 image;
gtk_tree_model_get (model, &iter,
IMAGE_ID, &image,
-1);
multi_page.images[multi_page.image_count] = image;
multi_page.image_count++;
}
if (multi_page.image_count == 0)
{
g_message (_("Error! In order to save the file, at least one image "
"should be added!"));
return FALSE;
}
return TRUE;
}
/* A function that is called when the button for adding an image was
* clicked
*/
static void
add_image_call (GtkWidget *widget,
gpointer img_combo)
{
GtkListStore *store;
GtkTreeIter iter;
gint32 image;
GdkPixbuf *pixbuf;
dnd_remove = FALSE;
gimp_int_combo_box_get_active (img_combo, &image);
store = GTK_LIST_STORE (model);
pixbuf = gimp_image_get_thumbnail (image, THUMB_WIDTH, THUMB_HEIGHT,
GIMP_PIXBUF_SMALL_CHECKS);
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
PAGE_NUMBER, g_strdup_printf (_("Page %d"),
multi_page.image_count+1),
THUMB, pixbuf,
IMAGE_NAME, gimp_image_get_name (image),
IMAGE_ID, image,
-1);
g_object_unref (pixbuf);
multi_page.image_count++;
dnd_remove = TRUE;
}
/* A function that is called when the button for deleting the selected
* images was clicked
*/
static void
del_image_call (GtkWidget *widget,
gpointer icon_view)
{
GList *list;
GtkTreeRowReference **items;
GtkTreePath *item_path;
GtkTreeIter item;
gpointer temp;
guint32 len;
dnd_remove = FALSE;
list = gtk_icon_view_get_selected_items (GTK_ICON_VIEW (icon_view));
len = g_list_length (list);
if (len > 0)
{
gint i;
items = g_newa (GtkTreeRowReference*, len);
for (i = 0; i < len; i++)
{
temp = g_list_nth_data (list, i);
items[i] = gtk_tree_row_reference_new (model, temp);
gtk_tree_path_free (temp);
}
g_list_free (list);
for (i = 0; i < len; i++)
{
item_path = gtk_tree_row_reference_get_path (items[i]);
gtk_tree_model_get_iter (model, &item, item_path);
gtk_list_store_remove (GTK_LIST_STORE (model), &item);
gtk_tree_path_free (item_path);
gtk_tree_row_reference_free (items[i]);
multi_page.image_count--;
}
g_free (items);
}
dnd_remove = TRUE;
recount_pages ();
}
/* A function that is called on rows-deleted signal. It will call the
* function to relabel the pages
*/
static void
remove_call (GtkTreeModel *tree_model,
GtkTreePath *path,
gpointer user_data)
{
if (dnd_remove)
/* The gtk documentation says that we should not free the indices array */
recount_pages ();
}
/* A function to relabel the pages in the icon view, when their order
* was changed
*/
static void
recount_pages (void)
{
GtkListStore *store;
GtkTreeIter iter;
gboolean valid;
gint32 i = 0;
store = GTK_LIST_STORE (model);
for (valid = gtk_tree_model_get_iter_first (model, &iter);
valid;
valid = gtk_tree_model_iter_next (model, &iter))
{
gtk_list_store_set (store, &iter,
PAGE_NUMBER, g_strdup_printf (_("Page %d"), i + 1),
-1);
i++;
}
}
/******************************************************/
/* Begining of the actual PDF functions */
/******************************************************/
static cairo_surface_t *
get_drawable_image (gint32 drawable_ID)
{
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
cairo_surface_t *surface;
cairo_format_t format;
gint width;
gint height;
src_buffer = gimp_drawable_get_buffer (drawable_ID);
width = gegl_buffer_get_width (src_buffer);
height = gegl_buffer_get_height (src_buffer);
if (gimp_drawable_has_alpha (drawable_ID))
format = CAIRO_FORMAT_ARGB32;
else
format = CAIRO_FORMAT_RGB24;
surface = cairo_image_surface_create (format, width, height);
dest_buffer = gimp_cairo_surface_create_buffer (surface);
gegl_buffer_copy (src_buffer, NULL, dest_buffer, NULL);
cairo_surface_mark_dirty (surface);
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
return surface;
}
/* A function to check if a drawable is single colored This allows to
* convert bitmaps to vector where possible
*/
static GimpRGB
get_layer_color (gint32 layer_ID,
gboolean *single)
{
GimpRGB col;
gdouble red, green, blue, alpha;
gdouble dev, devSum;
gdouble median, pixels, count, precentile;
devSum = 0;
red = 0;
green = 0;
blue = 0;
alpha = 0;
dev = 0;
if (gimp_drawable_is_indexed (layer_ID))
{
/* FIXME: We can't do a propper histogram on indexed layers! */
*single = FALSE;
col. r = col.g = col.b = col.a = 0;
return col;
}
if (gimp_drawable_bpp (layer_ID) >= 3)
{
/* Are we in RGB mode? */
gimp_histogram (layer_ID, GIMP_HISTOGRAM_RED, 0, 255,
&red, &dev, &median, &pixels, &count, &precentile);
devSum += dev;
gimp_histogram (layer_ID, GIMP_HISTOGRAM_GREEN, 0, 255,
&green, &dev, &median, &pixels, &count, &precentile);
devSum += dev;
gimp_histogram (layer_ID, GIMP_HISTOGRAM_BLUE, 0, 255,
&blue, &dev, &median, &pixels, &count, &precentile);
devSum += dev;
}
else
{
/* We are in Grayscale mode (or Indexed) */
gimp_histogram (layer_ID, GIMP_HISTOGRAM_VALUE, 0, 255,
&red, &dev, &median, &pixels, &count, &precentile);
devSum += dev;
green = red;
blue = red;
}
if (gimp_drawable_has_alpha (layer_ID))
gimp_histogram (layer_ID, GIMP_HISTOGRAM_ALPHA, 0, 255,
&alpha, &dev, &median, &pixels, &count, &precentile);
else
alpha = 255;
devSum += dev;
*single = devSum == 0;
col.r = red/255;
col.g = green/255;
col.b = blue/255;
col.a = alpha/255;
return col;
}
/* A function that uses Pango to render the text to our cairo surface,
* in the same way it was the user saw it inside gimp.
* Needs some work on choosing the font name better, and on hinting
* (freetype and pango differences)
*/
static void
drawText (gint32 text_id,
gdouble opacity,
cairo_t *cr,
gdouble x_res,
gdouble y_res)
{
GimpImageType type = gimp_drawable_type (text_id);
gchar *text = gimp_text_layer_get_text (text_id);
gchar *markup = gimp_text_layer_get_markup (text_id);
gchar *font_family;
cairo_font_options_t *options;
gint x;
gint y;
GimpRGB color;
GimpUnit unit;
gdouble size;
GimpTextHintStyle hinting;
GimpTextJustification j;
gboolean justify;
PangoAlignment align;
GimpTextDirection dir;
PangoDirection pango_dir;
PangoLayout *layout;
PangoContext *context;
PangoFontDescription *font_description;
gdouble indent;
gdouble line_spacing;
gdouble letter_spacing;
PangoAttribute *letter_spacing_at;
PangoAttrList *attr_list = pango_attr_list_new ();
cairo_save (cr);
options = cairo_font_options_create ();
attr_list = pango_attr_list_new ();
cairo_get_font_options (cr, options);
/* Position */
gimp_drawable_offsets (text_id, &x, &y);
cairo_move_to (cr, x, y);
/* Color */
/* When dealing with a gray/indexed image, the viewed color of the text layer
* can be different than the one kept in the memory */
if (type == GIMP_RGBA_IMAGE)
gimp_text_layer_get_color (text_id, &color);
else
gimp_image_pick_color (gimp_item_get_image (text_id),
text_id, x, y, FALSE, FALSE, 0, &color);
cairo_set_source_rgba (cr, color.r, color.g, color.b, opacity);
/* Hinting */
hinting = gimp_text_layer_get_hint_style (text_id);
switch (hinting)
{
case GIMP_TEXT_HINT_STYLE_NONE:
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
break;
case GIMP_TEXT_HINT_STYLE_SLIGHT:
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_SLIGHT);
break;
case GIMP_TEXT_HINT_STYLE_MEDIUM:
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_MEDIUM);
break;
case GIMP_TEXT_HINT_STYLE_FULL:
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_FULL);
break;
}
/* Antialiasing */
if (gimp_text_layer_get_antialias (text_id))
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_DEFAULT);
else
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_NONE);
/* We are done with cairo's settings. It's time to create the
* context
*/
cairo_set_font_options (cr, options);
context = pango_cairo_create_context (cr);
pango_cairo_context_set_font_options (context, options);
/* Text Direction */
dir = gimp_text_layer_get_base_direction (text_id);
if (dir == GIMP_TEXT_DIRECTION_RTL)
pango_dir = PANGO_DIRECTION_RTL;
else
pango_dir = PANGO_DIRECTION_LTR;
pango_context_set_base_dir (context, pango_dir);
/* We are done with the context's settings. It's time to create the
* layout
*/
layout = pango_layout_new (context);
/* Font */
font_family = gimp_text_layer_get_font (text_id);
/* We need to find a way to convert GIMP's returned font name to a
* normal Pango name... Hopefully GIMP 2.8 with Pango will fix it.
*/
font_description = pango_font_description_from_string (font_family);
/* Font Size */
size = gimp_text_layer_get_font_size (text_id, &unit);
size = gimp_units_to_pixels (size, unit, y_res);
pango_font_description_set_absolute_size (font_description, size * PANGO_SCALE);
pango_layout_set_font_description (layout, font_description);
/* Width and height */
pango_layout_set_width (layout, gimp_drawable_width (text_id) * PANGO_SCALE);
pango_layout_set_height (layout, gimp_drawable_height (text_id) * PANGO_SCALE);
/* Justification, and Alignment */
justify = FALSE;
j = gimp_text_layer_get_justification (text_id);
if (j == GIMP_TEXT_JUSTIFY_CENTER)
align = PANGO_ALIGN_CENTER;
else if (j == GIMP_TEXT_JUSTIFY_LEFT)
align = PANGO_ALIGN_LEFT;
else if (j == GIMP_TEXT_JUSTIFY_RIGHT)
align = PANGO_ALIGN_RIGHT;
else /* We have GIMP_TEXT_JUSTIFY_FILL */
{
if (dir == GIMP_TEXT_DIRECTION_LTR)
align = PANGO_ALIGN_LEFT;
else
align = PANGO_ALIGN_RIGHT;
justify = TRUE;
}
/* Indentation */
indent = gimp_text_layer_get_indent (text_id);
pango_layout_set_indent (layout, (int)(PANGO_SCALE * indent));
/* Line Spacing */
line_spacing = gimp_text_layer_get_line_spacing (text_id);
pango_layout_set_spacing (layout, (int)(PANGO_SCALE * line_spacing));
/* Letter Spacing */
letter_spacing = gimp_text_layer_get_letter_spacing (text_id);
letter_spacing_at = pango_attr_letter_spacing_new ((int)(PANGO_SCALE * letter_spacing));
pango_attr_list_insert (attr_list, letter_spacing_at);
pango_layout_set_justify (layout, justify);
pango_layout_set_alignment (layout, align);
pango_layout_set_attributes (layout, attr_list);
/* Use the pango markup of the text layer */
if (markup != NULL && markup[0] != '\0')
pango_layout_set_markup (layout, markup, -1);
else /* If we can't find a markup, then it has just text */
pango_layout_set_text (layout, text, -1);
pango_cairo_show_layout (cr, layout);
g_free (text);
g_free (font_family);
g_object_unref (layout);
pango_font_description_free (font_description);
g_object_unref (context);
pango_attr_list_unref (attr_list);
cairo_font_options_destroy (options);
cairo_restore (cr);
}
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