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gimp/plug-ins/common/file-mng.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Multiple-image Network Graphics (MNG) plug-in
*
* Copyright (C) 2002 Mukund Sivaraman <muks@mukund.org>
* Portions are copyright of the authors of the file-gif-export, file-png-export
* and file-jpeg-export plug-ins' code. The exact ownership of these code
* fragments has not been determined.
*
* This work was sponsored by Xinit Systems Limited, UK.
* http://www.xinitsystems.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 <https://www.gnu.org/licenses/>.
* --
*
* For now, this MNG plug-in can only export images. It cannot load images.
* Save your working copy as .xcf and use this for "exporting" your images
* to MNG. Supports animation the same way as animated GIFs. Supports alpha
* transparency. Uses the libmng library (http://www.libmng.com/).
* The MIME content-type for MNG images is video/x-mng for now. Make sure
* your web-server is configured appropriately if you want to serve MNG
* images.
*
* Since libmng cannot write PNG, JNG and delta PNG chunks at this time
* (when this text was written), this plug-in uses libpng and jpeglib to
* create the data for the chunks.
*
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <glib/gstdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
/* libpng and jpeglib are currently used in this plug-in. */
#include <png.h>
#include <jpeglib.h>
/* Grrr. The grrr is because the following have to be defined by the
* application as well for some reason, although they were enabled
* when libmng was compiled. The authors of libmng must look into
* this.
*/
#if !defined(MNG_SUPPORT_FULL)
#define MNG_SUPPORT_FULL 1
#endif
#if !defined(MNG_SUPPORT_READ)
#define MNG_SUPPORT_READ 1
#endif
#if !defined(MNG_SUPPORT_WRITE)
#define MNG_SUPPORT_WRITE 1
#endif
#if !defined(MNG_SUPPORT_DISPLAY)
#define MNG_SUPPORT_DISPLAY 1
#endif
#if !defined(MNG_ACCESS_CHUNKS)
#define MNG_ACCESS_CHUNKS 1
#endif
#include <libmng.h>
#include "libgimp/gimp.h"
#include "libgimp/gimpui.h"
#include "libgimp/stdplugins-intl.h"
#define EXPORT_PROC "file-mng-export"
#define PLUG_IN_BINARY "file-mng"
#define PLUG_IN_ROLE "gimp-file-mng"
#define SCALE_WIDTH 125
enum
{
CHUNKS_PNG_D,
CHUNKS_JNG_D,
CHUNKS_PNG,
CHUNKS_JNG
};
enum
{
DISPOSE_COMBINE,
DISPOSE_REPLACE
};
/* These are not saved or restored. */
struct mng_globals_t
{
gboolean has_trns;
png_bytep trans;
int num_trans;
gboolean has_plte;
png_colorp palette;
int num_palette;
};
/* The output FILE pointer which is used by libmng; passed around as
* user data.
*/
struct mnglib_userdata_t
{
FILE *fp;
};
typedef struct _Mng Mng;
typedef struct _MngClass MngClass;
struct _Mng
{
GimpPlugIn parent_instance;
};
struct _MngClass
{
GimpPlugInClass parent_class;
};
#define MNG_TYPE (mng_get_type ())
#define MNG(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), MNG_TYPE, Mng))
GType mng_get_type (void) G_GNUC_CONST;
static GList * mng_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * mng_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * mng_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data);
static mng_ptr MNG_DECL myalloc (mng_size_t size);
static void MNG_DECL myfree (mng_ptr ptr,
mng_size_t size);
static mng_bool MNG_DECL myopenstream (mng_handle handle);
static mng_bool MNG_DECL myclosestream (mng_handle handle);
static mng_bool MNG_DECL mywritedata (mng_handle handle,
mng_ptr buf,
mng_uint32 size,
mng_uint32 *written_size);
static gint32 parse_chunks_type_from_layer_name (const gchar *str,
gint default_chunks);
static gint32 parse_disposal_type_from_layer_name (const gchar *str,
gint default_dispose);
static gint32 parse_ms_tag_from_layer_name (const gchar *str,
gint default_delay);
static gint find_unused_ia_color (guchar *pixels,
gint numpixels,
gint *colors);
static gboolean ia_has_transparent_pixels (guchar *pixels,
gint numpixels);
static gboolean respin_cmap (png_structp png_ptr,
png_infop png_info_ptr,
guchar *remap,
GimpImage *image,
GeglBuffer *buffer,
int *bit_depth);
static gboolean mng_export_image (GFile *file,
GimpImage *image,
gint n_drawables,
GList *drawables,
GObject *config,
GError **error);
static gboolean mng_save_dialog (GimpImage *image,
GimpProcedure *procedure,
GObject *config);
G_DEFINE_TYPE (Mng, mng, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (MNG_TYPE)
DEFINE_STD_SET_I18N
static struct mng_globals_t mngg;
static void
mng_class_init (MngClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = mng_query_procedures;
plug_in_class->create_procedure = mng_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
mng_init (Mng *mng)
{
}
static GList *
mng_query_procedures (GimpPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (EXPORT_PROC));
}
static GimpProcedure *
mng_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, EXPORT_PROC))
{
procedure = gimp_export_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
FALSE, mng_export, NULL, NULL);
gimp_procedure_set_image_types (procedure, "*");
gimp_procedure_set_menu_label (procedure, _("MNG animation"));
gimp_file_procedure_set_format_name (GIMP_FILE_PROCEDURE (procedure),
_("MNG"));
gimp_procedure_set_documentation (procedure,
_("Saves images in the MNG file format"),
_("This plug-in saves images in the "
"Multiple-image Network Graphics (MNG) "
"format which can be used as a "
"replacement for animated GIFs, and "
"more."),
name);
gimp_procedure_set_attribution (procedure,
"Mukund Sivaraman <muks@mukund.org>",
"Mukund Sivaraman <muks@mukund.org>",
"November 19, 2002");
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"image/x-mng");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"mng");
gimp_procedure_add_boolean_argument (procedure, "interlaced",
_("_Interlace"),
_("Use interlacing"),
FALSE,
G_PARAM_READWRITE);
gimp_procedure_add_int_argument (procedure, "png-compression",
_("_PNG compression level"),
_("PNG compression level, choose a high compression "
"level for small file size"),
0, 9, 9,
G_PARAM_READWRITE);
gimp_procedure_add_double_argument (procedure, "jpeg-quality",
_("JPEG compression _quality"),
_("JPEG quality factor"),
0, 1, 0.75,
G_PARAM_READWRITE);
gimp_procedure_add_double_argument (procedure, "jpeg-smoothing",
_("_JPEG smoothing factor"),
_("JPEG smoothing factor"),
0, 1, 0,
G_PARAM_READWRITE);
gimp_procedure_add_boolean_argument (procedure, "loop",
_("L_oop"),
_("(ANIMATED MNG) Loop infinitely"),
TRUE,
G_PARAM_READWRITE);
gimp_procedure_add_int_argument (procedure, "default-delay",
_("Default fra_me delay"),
_("(ANIMATED MNG) Default delay between frames in "
"milliseconds"),
1, G_MAXINT, 100,
G_PARAM_READWRITE);
gimp_procedure_add_int_argument (procedure, "default-chunks",
_("Default chunks t_ype"),
_("(ANIMATED MNG) Default chunks type "
"(0 = PNG + Delta PNG; 1 = JNG + Delta PNG; "
"2 = All PNG; 3 = All JNG)"),
0, 3, CHUNKS_PNG_D,
G_PARAM_READWRITE);
gimp_procedure_add_int_argument (procedure, "default-dispose",
_("De_fault frame disposal"),
_("(ANIMATED MNG) Default dispose type "
"(0 = combine; 1 = replace)"),
0, 1, DISPOSE_COMBINE,
G_PARAM_READWRITE);
gimp_procedure_add_boolean_argument (procedure, "bkgd",
_("Save _background color"),
_("Write bKGd (background color) chunk"),
FALSE,
G_PARAM_READWRITE);
gimp_procedure_add_boolean_argument (procedure, "gama",
_("Save _gamma"),
_("Write gAMA (gamma) chunk"),
FALSE,
G_PARAM_READWRITE);
gimp_procedure_add_boolean_argument (procedure, "phys",
_("Sa_ve resolution"),
_("Write pHYs (image resolution) chunk"),
TRUE,
G_PARAM_READWRITE);
gimp_procedure_add_boolean_argument (procedure, "time",
_("Save creation _time"),
_("Write tIME (creation time) chunk"),
TRUE,
G_PARAM_READWRITE);
}
return procedure;
}
static GimpValueArray *
mng_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpExportReturn export = GIMP_EXPORT_IGNORE;
GList *drawables;
gint n_drawables;
GError *error = NULL;
gegl_init (NULL, NULL);
if (run_mode == GIMP_RUN_INTERACTIVE)
{
gimp_ui_init (PLUG_IN_BINARY);
if (! mng_save_dialog (image, procedure, G_OBJECT (config)))
status = GIMP_PDB_CANCEL;
}
export = gimp_export_image (&image,
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED |
GIMP_EXPORT_CAN_HANDLE_ALPHA |
GIMP_EXPORT_CAN_HANDLE_LAYERS);
drawables = gimp_image_list_layers (image);
n_drawables = g_list_length (drawables);
if (status == GIMP_PDB_SUCCESS)
{
if (! mng_export_image (file, image, n_drawables, drawables,
G_OBJECT (config), &error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image);
g_list_free (drawables);
return gimp_procedure_new_return_values (procedure, status, error);
}
/*
* Callbacks for libmng
*/
static mng_ptr MNG_DECL
myalloc (mng_size_t size)
{
gpointer ptr;
ptr = g_try_malloc (size);
if (ptr != NULL)
memset (ptr, 0, size);
return ((mng_ptr) ptr);
}
static void MNG_DECL
myfree (mng_ptr ptr,
mng_size_t size)
{
g_free (ptr);
}
static mng_bool MNG_DECL
myopenstream (mng_handle handle)
{
return MNG_TRUE;
}
static mng_bool MNG_DECL
myclosestream (mng_handle handle)
{
return MNG_TRUE;
}
static mng_bool MNG_DECL
mywritedata (mng_handle handle,
mng_ptr buf,
mng_uint32 size,
mng_uint32 *written_size)
{
struct mnglib_userdata_t *userdata =
(struct mnglib_userdata_t *) mng_get_userdata (handle);
*written_size = (mng_uint32) fwrite ((void *) buf, 1,
(size_t) size, userdata->fp);
return MNG_TRUE;
}
/* Parses which output chunk type to use for this layer from the layer
* name.
*/
static gint32
parse_chunks_type_from_layer_name (const gchar *str,
gint default_chunks)
{
guint i;
for (i = 0; (i + 5) <= strlen (str); i++)
{
if (g_ascii_strncasecmp (str + i, "(png)", 5) == 0)
return CHUNKS_PNG;
else if (g_ascii_strncasecmp (str + i, "(jng)", 5) == 0)
return CHUNKS_JNG;
}
return default_chunks;
}
/* Parses which disposal type to use for this layer from the layer
* name.
*/
static gint32
parse_disposal_type_from_layer_name (const gchar *str,
gint default_dispose)
{
guint i;
for (i = 0; (i + 9) <= strlen (str); i++)
{
if (g_ascii_strncasecmp (str + i, "(combine)", 9) == 0)
return DISPOSE_COMBINE;
else if (g_ascii_strncasecmp (str + i, "(replace)", 9) == 0)
return DISPOSE_REPLACE;
}
return default_dispose;
}
/* Parses the millisecond delay to use for this layer
* from the layer name. */
static gint32
parse_ms_tag_from_layer_name (const gchar *str,
gint default_delay)
{
guint offset = 0;
gint32 sum = 0;
guint length = strlen (str);
while (TRUE)
{
while ((offset < length) && (str[offset] != '('))
offset++;
if (offset >= length)
return default_delay;
offset++;
if (g_ascii_isdigit (str[offset]))
break;
}
do
{
sum *= 10;
sum += str[offset] - '0';
offset++;
}
while ((offset < length) && (g_ascii_isdigit (str[offset])));
if ((length - offset) <= 2)
return default_delay;
if ((g_ascii_toupper (str[offset]) != 'M') ||
(g_ascii_toupper (str[offset + 1]) != 'S'))
return default_delay;
return sum;
}
/* Try to find a color in the palette which isn't actually
* used in the image, so that we can use it as the transparency
* index. Taken from png.c */
static gint
find_unused_ia_color (guchar *pixels,
gint numpixels,
gint *colors)
{
gint i;
gboolean ix_used[256];
gboolean trans_used = FALSE;
for (i = 0; i < *colors; i++)
{
ix_used[i] = FALSE;
}
for (i = 0; i < numpixels; i++)
{
/* If alpha is over a threshold, the color index in the
* palette is taken. Otherwise, this pixel is transparent. */
if (pixels[i * 2 + 1] > 127)
ix_used[pixels[i * 2]] = TRUE;
else
trans_used = TRUE;
}
/* If there is no transparency, ignore alpha. */
if (trans_used == FALSE)
return -1;
for (i = 0; i < *colors; i++)
{
if (ix_used[i] == FALSE)
{
return i;
}
}
/* Couldn't find an unused color index within the number of
bits per pixel we wanted. Will have to increment the number
of colors in the image and assign a transparent pixel there. */
if ((*colors) < 256)
{
(*colors)++;
return ((*colors) - 1);
}
return -1;
}
static gboolean
ia_has_transparent_pixels (guchar *pixels,
gint numpixels)
{
while (numpixels --)
{
if (pixels [1] <= 127)
return TRUE;
pixels += 2;
}
return FALSE;
}
static int
get_bit_depth_for_palette (int num_palette)
{
if (num_palette <= 2)
return 1;
else if (num_palette <= 4)
return 2;
else if (num_palette <= 16)
return 4;
else
return 8;
}
/* Spins the color map (palette) putting the transparent color at
* index 0 if there is space. If there isn't any space, warn the user
* and forget about transparency. Returns TRUE if the colormap has
* been changed and FALSE otherwise.
*/
static gboolean
respin_cmap (png_structp pp,
png_infop info,
guchar *remap,
GimpImage *image,
GeglBuffer *buffer,
int *bit_depth)
{
static guchar trans[] = { 0 };
guchar *before;
guchar *pixels;
gint numpixels;
gint colors;
gint transparent;
gint cols, rows;
before = gimp_image_get_colormap (image, NULL, &colors);
/* Make sure there is something in the colormap */
if (colors == 0)
{
before = g_newa (guchar, 3);
memset (before, 0, sizeof (guchar) * 3);
colors = 1;
}
cols = gegl_buffer_get_width (buffer);
rows = gegl_buffer_get_height (buffer);
numpixels = cols * rows;
pixels = (guchar *) g_malloc (numpixels * 2);
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, 0, cols, rows), 1.0,
NULL, pixels,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
if (ia_has_transparent_pixels (pixels, numpixels))
{
transparent = find_unused_ia_color (pixels, numpixels, &colors);
if (transparent != -1)
{
static png_color palette[256] = { {0, 0, 0} };
gint i;
/* Set tRNS chunk values for writing later. */
mngg.has_trns = TRUE;
mngg.trans = trans;
mngg.num_trans = 1;
/* Transform all pixels with a value = transparent to
* 0 and vice versa to compensate for re-ordering in palette
* due to png_set_tRNS().
*/
remap[0] = transparent;
remap[transparent] = 0;
/* Copy from index 0 to index transparent - 1 to index 1 to
* transparent of after, then from transparent+1 to colors-1
* unchanged, and finally from index transparent to index 0.
*/
for (i = 1; i < colors; i++)
{
palette[i].red = before[3 * remap[i]];
palette[i].green = before[3 * remap[i] + 1];
palette[i].blue = before[3 * remap[i] + 2];
}
/* Set PLTE chunk values for writing later. */
mngg.has_plte = TRUE;
mngg.palette = palette;
mngg.num_palette = colors;
*bit_depth = get_bit_depth_for_palette (colors);
return TRUE;
}
else
{
g_message (_("Couldn't losslessly save transparency, "
"saving opacity instead."));
}
}
mngg.has_plte = TRUE;
mngg.palette = (png_colorp) before;
mngg.num_palette = colors;
*bit_depth = get_bit_depth_for_palette (colors);
return FALSE;
}
static mng_retcode
mng_putchunk_plte_wrapper (mng_handle handle,
gint numcolors,
const guchar *colormap)
{
mng_palette8 palette;
memset (palette, 0, sizeof palette);
if (0 < numcolors)
memcpy (palette, colormap, numcolors * sizeof palette[0]);
return mng_putchunk_plte (handle, numcolors, palette);
}
static mng_retcode
mng_putchunk_trns_wrapper (mng_handle handle,
gint n_alphas,
const guchar *buffer)
{
const mng_bool mng_global = TRUE;
const mng_bool mng_empty = TRUE;
mng_uint8arr alphas;
memset (alphas, 0, sizeof alphas);
if (buffer && 0 < n_alphas)
memcpy (alphas, buffer, n_alphas * sizeof alphas[0]);
return mng_putchunk_trns (handle,
! mng_empty,
! mng_global,
MNG_COLORTYPE_INDEXED,
n_alphas,
alphas,
0, 0, 0, 0, 0, alphas);
}
static gboolean
mng_export_image (GFile *file,
GimpImage *image,
gint n_drawables,
GList *drawables,
GObject *config,
GError **error)
{
gboolean ret = FALSE;
gint rows, cols;
volatile gint i;
time_t t;
struct tm *gmt;
gint num_layers;
GimpLayer **layers;
struct mnglib_userdata_t *userdata;
mng_handle handle;
guint32 mng_ticks_per_second;
guint32 mng_simplicity_profile;
gboolean config_interlaced;
gint config_png_compression;
gdouble config_jpeg_quality;
gdouble config_jpeg_smoothing;
gboolean config_loop;
gint config_default_delay;
gint config_default_chunks;
gint config_default_dispose;
gboolean config_bkgd;
gboolean config_gama;
gboolean config_phys;
gboolean config_time;
g_object_get (config,
"interlaced", &config_interlaced,
"png-compression", &config_png_compression,
"jpeg-quality", &config_jpeg_quality,
"jpeg-smoothing", &config_jpeg_smoothing,
"loop", &config_loop,
"default-delay", &config_default_delay,
"default-chunks", &config_default_chunks,
"default-dispose", &config_default_dispose,
"bkgd", &config_bkgd,
"gama", &config_gama,
"phys", &config_phys,
"time", &config_time,
NULL);
layers = gimp_image_get_layers (image, &num_layers);
if (num_layers < 1)
return FALSE;
if (num_layers > 1)
mng_ticks_per_second = 1000;
else
mng_ticks_per_second = 0;
rows = gimp_image_get_height (image);
cols = gimp_image_get_width (image);
mng_simplicity_profile = (MNG_SIMPLICITY_VALID |
MNG_SIMPLICITY_SIMPLEFEATURES |
MNG_SIMPLICITY_COMPLEXFEATURES);
/* JNG and delta-PNG chunks exist */
mng_simplicity_profile |= (MNG_SIMPLICITY_JNG |
MNG_SIMPLICITY_DELTAPNG);
for (i = 0; i < num_layers; i++)
{
if (gimp_drawable_has_alpha (GIMP_DRAWABLE (layers[i])))
{
/* internal transparency exists */
mng_simplicity_profile |= MNG_SIMPLICITY_TRANSPARENCY;
/* validity of following flags */
mng_simplicity_profile |= 0x00000040;
/* semi-transparency exists */
mng_simplicity_profile |= 0x00000100;
/* background transparency should happen */
mng_simplicity_profile |= 0x00000080;
break;
}
}
userdata = g_new0 (struct mnglib_userdata_t, 1);
userdata->fp = g_fopen (g_file_peek_path (file), "wb");
if (! userdata->fp)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for writing: %s"),
gimp_file_get_utf8_name (file), g_strerror (errno));
goto err;
}
handle = mng_initialize ((mng_ptr) userdata, myalloc, myfree, NULL);
if (! handle)
{
g_warning ("Unable to mng_initialize() in mng_export_image()");
goto err2;
}
if ((mng_setcb_openstream (handle, myopenstream) != MNG_NOERROR) ||
(mng_setcb_closestream (handle, myclosestream) != MNG_NOERROR) ||
(mng_setcb_writedata (handle, mywritedata) != MNG_NOERROR))
{
g_warning ("Unable to setup callbacks in mng_export_image()");
goto err3;
}
if (mng_create (handle) != MNG_NOERROR)
{
g_warning ("Unable to mng_create() image in mng_export_image()");
goto err3;
}
if (mng_putchunk_mhdr (handle, cols, rows, mng_ticks_per_second, 1,
num_layers, config_default_delay,
mng_simplicity_profile) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_mhdr() in mng_export_image()");
goto err3;
}
if ((num_layers > 1) && (config_loop))
{
gint32 ms =
parse_ms_tag_from_layer_name (gimp_item_get_name (GIMP_ITEM (layers[0])),
config_default_delay);
if (mng_putchunk_term (handle, MNG_TERMACTION_REPEAT,
MNG_ITERACTION_LASTFRAME,
ms, 0x7fffffff) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_term() in mng_export_image()");
goto err3;
}
}
else
{
gint32 ms =
parse_ms_tag_from_layer_name (gimp_item_get_name (GIMP_ITEM (layers[0])),
config_default_delay);
if (mng_putchunk_term (handle, MNG_TERMACTION_LASTFRAME,
MNG_ITERACTION_LASTFRAME,
ms, 0x7fffffff) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_term() in mng_export_image()");
goto err3;
}
}
/* For now, we hardwire a comment */
if (mng_putchunk_text (handle,
strlen (MNG_TEXT_TITLE), MNG_TEXT_TITLE,
18, "Created using GIMP") != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_text() in mng_export_image()");
goto err3;
}
#if 0
/* how do we get this to work? */
if (config_bkgd)
{
GeglColor *background;
guchar rgb[3];
guchar luminance[1];
background = gimp_context_get_background ();
gegl_color_get_pixel (background, babl_format ("R'G'B' u8"), rgb);
gegl_color_get_pixel (background, babl_format ("Y' u8"), luminance);
g_object_unref (background);
if (mng_putchunk_back (handle, rgb[0], rgb[1], rgb[2],
MNG_BACKGROUNDCOLOR_MANDATORY,
0, MNG_BACKGROUNDIMAGE_NOTILE) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_back() in mng_export_image()");
goto err3;
}
if (mng_putchunk_bkgd (handle, MNG_FALSE, 2, 0,
luminance,
rgb[0], rgb[1], rgb[2])) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_bkgd() in mng_export_image()");
goto err3;
}
}
#endif
if (config_gama)
{
if (mng_putchunk_gama (handle, MNG_FALSE,
(1.0 / 2.2 * 100000)) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_gama() in mng_export_image()");
goto err3;
}
}
#if 0
/* how do we get this to work? */
if (config_phys)
{
gimp_image_get_resolution (image, &xres, &yres);
if (mng_putchunk_phyg (handle, MNG_FALSE,
(mng_uint32) (xres * 39.37),
(mng_uint32) (yres * 39.37), 1) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_phyg() in mng_export_image()");
goto err3;
}
if (mng_putchunk_phys (handle, MNG_FALSE,
(mng_uint32) (xres * 39.37),
(mng_uint32) (yres * 39.37), 1) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_phys() in mng_export_image()");
goto err3;
}
}
#endif
if (config_time)
{
t = time (NULL);
gmt = gmtime (&t);
if (mng_putchunk_time (handle, gmt->tm_year + 1900, gmt->tm_mon + 1,
gmt->tm_mday, gmt->tm_hour, gmt->tm_min,
gmt->tm_sec) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_time() in mng_export_image()");
goto err3;
}
}
if (gimp_image_get_base_type (image) == GIMP_INDEXED)
{
guchar *palette;
gint numcolors;
palette = gimp_image_get_colormap (image, NULL, &numcolors);
if ((numcolors != 0) &&
(mng_putchunk_plte_wrapper (handle, numcolors,
palette) != MNG_NOERROR))
{
g_warning ("Unable to mng_putchunk_plte() in mng_export_image()");
goto err3;
}
}
for (i = (num_layers - 1); i >= 0; i--)
{
GimpImageType layer_drawable_type;
GeglBuffer *layer_buffer;
gint layer_offset_x, layer_offset_y;
gint layer_rows, layer_cols;
gchar *layer_name;
gint layer_chunks_type;
const Babl *layer_format;
volatile gint layer_bpp;
guint8 __attribute__((unused))layer_mng_colortype;
guint8 __attribute__((unused))layer_mng_compression_type;
guint8 __attribute__((unused))layer_mng_interlace_type;
gboolean layer_has_unique_palette;
gchar frame_mode;
int frame_delay;
GFile *temp_file;
png_structp pp;
png_infop info;
FILE *infile, *outfile;
int num_passes;
int tile_height;
guchar **layer_pixels, *layer_pixel;
int pass, j, k, begin, end, num;
guchar *fixed;
guchar layer_remap[256];
int color_type;
int bit_depth;
layer_name = gimp_item_get_name (GIMP_ITEM (layers[i]));
layer_chunks_type = parse_chunks_type_from_layer_name (layer_name,
config_default_chunks);
layer_drawable_type = gimp_drawable_type (GIMP_DRAWABLE (layers[i]));
layer_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layers[i]));
layer_cols = gegl_buffer_get_width (layer_buffer);
layer_rows = gegl_buffer_get_height (layer_buffer);
gimp_drawable_get_offsets (GIMP_DRAWABLE (layers[i]),
&layer_offset_x, &layer_offset_y);
layer_has_unique_palette = TRUE;
for (j = 0; j < 256; j++)
layer_remap[j] = j;
switch (layer_drawable_type)
{
case GIMP_RGB_IMAGE:
layer_format = babl_format ("R'G'B' u8");
layer_mng_colortype = MNG_COLORTYPE_RGB;
break;
case GIMP_RGBA_IMAGE:
layer_format = babl_format ("R'G'B'A u8");
layer_mng_colortype = MNG_COLORTYPE_RGBA;
break;
case GIMP_GRAY_IMAGE:
layer_format = babl_format ("Y' u8");
layer_mng_colortype = MNG_COLORTYPE_GRAY;
break;
case GIMP_GRAYA_IMAGE:
layer_format = babl_format ("Y'A u8");
layer_mng_colortype = MNG_COLORTYPE_GRAYA;
break;
case GIMP_INDEXED_IMAGE:
layer_format = gegl_buffer_get_format (layer_buffer);
layer_mng_colortype = MNG_COLORTYPE_INDEXED;
break;
case GIMP_INDEXEDA_IMAGE:
layer_format = gegl_buffer_get_format (layer_buffer);
layer_mng_colortype = MNG_COLORTYPE_INDEXED | MNG_COLORTYPE_GRAYA;
break;
default:
g_warning ("Unsupported GimpImageType in mng_export_image()");
goto err3;
}
layer_bpp = babl_format_get_bytes_per_pixel (layer_format);
/* Delta PNG chunks are not yet supported */
/* if (i == (num_layers - 1)) */
{
if (layer_chunks_type == CHUNKS_JNG_D)
layer_chunks_type = CHUNKS_JNG;
else if (layer_chunks_type == CHUNKS_PNG_D)
layer_chunks_type = CHUNKS_PNG;
}
switch (layer_chunks_type)
{
case CHUNKS_PNG_D:
layer_mng_compression_type = MNG_COMPRESSION_DEFLATE;
if (config_interlaced)
layer_mng_interlace_type = MNG_INTERLACE_ADAM7;
else
layer_mng_interlace_type = MNG_INTERLACE_NONE;
break;
case CHUNKS_JNG_D:
layer_mng_compression_type = MNG_COMPRESSION_DEFLATE;
if (config_interlaced)
layer_mng_interlace_type = MNG_INTERLACE_ADAM7;
else
layer_mng_interlace_type = MNG_INTERLACE_NONE;
break;
case CHUNKS_PNG:
layer_mng_compression_type = MNG_COMPRESSION_DEFLATE;
if (config_interlaced)
layer_mng_interlace_type = MNG_INTERLACE_ADAM7;
else
layer_mng_interlace_type = MNG_INTERLACE_NONE;
break;
case CHUNKS_JNG:
layer_mng_compression_type = MNG_COMPRESSION_BASELINEJPEG;
if (config_interlaced)
layer_mng_interlace_type = MNG_INTERLACE_PROGRESSIVE;
else
layer_mng_interlace_type = MNG_INTERLACE_SEQUENTIAL;
break;
default:
g_warning ("Huh? Programmer stupidity error "
"with 'layer_chunks_type'");
goto err3;
}
if ((i == (num_layers - 1)) ||
(parse_disposal_type_from_layer_name (layer_name,
config_default_dispose) != DISPOSE_COMBINE))
frame_mode = MNG_FRAMINGMODE_3;
else
frame_mode = MNG_FRAMINGMODE_1;
frame_delay = parse_ms_tag_from_layer_name (layer_name,
config_default_delay);
if (mng_putchunk_fram (handle, MNG_FALSE, frame_mode, 0, NULL,
MNG_CHANGEDELAY_DEFAULT,
MNG_CHANGETIMOUT_NO,
MNG_CHANGECLIPPING_DEFAULT,
MNG_CHANGESYNCID_NO,
frame_delay, 0, 0,
layer_offset_x,
layer_offset_x + layer_cols,
layer_offset_y,
layer_offset_y + layer_rows,
0, NULL) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_fram() in mng_export_image()");
goto err3;
}
if ((layer_offset_x != 0) || (layer_offset_y != 0))
{
if (mng_putchunk_defi (handle, 0, 0, 1, 1, layer_offset_x,
layer_offset_y, 1, layer_offset_x,
layer_offset_x + layer_cols, layer_offset_y,
layer_offset_y + layer_rows) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_defi() in mng_export_image()");
goto err3;
}
}
if ((temp_file = gimp_temp_file ("mng")) == NULL)
{
g_warning ("gimp_temp_file() failed in mng_export_image()");
goto err3;
}
if ((outfile = g_fopen (g_file_peek_path (temp_file), "wb")) == NULL)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for writing: %s"),
gimp_file_get_utf8_name (temp_file),
g_strerror (errno));
g_file_delete (temp_file, NULL, NULL);
goto err3;
}
pp = png_create_write_struct (PNG_LIBPNG_VER_STRING,
NULL, NULL, NULL);
if (! pp)
{
g_warning ("Unable to png_create_write_struct() in mng_export_image()");
fclose (outfile);
g_file_delete (temp_file, NULL, NULL);
goto err3;
}
info = png_create_info_struct (pp);
if (! info)
{
g_warning
("Unable to png_create_info_struct() in mng_export_image()");
png_destroy_write_struct (&pp, NULL);
fclose (outfile);
g_file_delete (temp_file, NULL, NULL);
goto err3;
}
if (setjmp (png_jmpbuf (pp)) != 0)
{
g_warning ("HRM saving PNG in mng_export_image()");
png_destroy_write_struct (&pp, &info);
fclose (outfile);
g_file_delete (temp_file, NULL, NULL);
goto err3;
}
png_init_io (pp, outfile);
bit_depth = 8;
switch (layer_drawable_type)
{
case GIMP_RGB_IMAGE:
color_type = PNG_COLOR_TYPE_RGB;
break;
case GIMP_RGBA_IMAGE:
color_type = PNG_COLOR_TYPE_RGB_ALPHA;
break;
case GIMP_GRAY_IMAGE:
color_type = PNG_COLOR_TYPE_GRAY;
break;
case GIMP_GRAYA_IMAGE:
color_type = PNG_COLOR_TYPE_GRAY_ALPHA;
break;
case GIMP_INDEXED_IMAGE:
color_type = PNG_COLOR_TYPE_PALETTE;
mngg.has_plte = TRUE;
mngg.palette = (png_colorp)
gimp_image_get_colormap (image, NULL, &mngg.num_palette);
bit_depth = get_bit_depth_for_palette (mngg.num_palette);
break;
case GIMP_INDEXEDA_IMAGE:
color_type = PNG_COLOR_TYPE_PALETTE;
layer_has_unique_palette =
respin_cmap (pp, info, layer_remap,
image, layer_buffer,
&bit_depth);
break;
default:
g_warning ("This can't be!\n");
png_destroy_write_struct (&pp, &info);
fclose (outfile);
g_file_delete (temp_file, NULL, NULL);
goto err3;
}
/* Note: png_set_IHDR() must be called before any other
* png_set_*() functions.
*/
png_set_IHDR (pp, info, layer_cols, layer_rows,
bit_depth,
color_type,
config_interlaced ? PNG_INTERLACE_ADAM7 : PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE,
PNG_FILTER_TYPE_BASE);
if (mngg.has_trns)
{
png_set_tRNS (pp, info, mngg.trans, mngg.num_trans, NULL);
}
if (mngg.has_plte)
{
png_set_PLTE (pp, info, mngg.palette, mngg.num_palette);
}
png_set_compression_level (pp, config_png_compression);
png_write_info (pp, info);
if (config_interlaced)
num_passes = png_set_interlace_handling (pp);
else
num_passes = 1;
if ((color_type == PNG_COLOR_TYPE_PALETTE) &&
(bit_depth < 8))
png_set_packing (pp);
tile_height = gimp_tile_height ();
layer_pixel = g_new (guchar, tile_height * layer_cols * layer_bpp);
layer_pixels = g_new (guchar *, tile_height);
for (j = 0; j < tile_height; j++)
layer_pixels[j] = layer_pixel + (layer_cols * layer_bpp * j);
for (pass = 0; pass < num_passes; pass++)
{
for (begin = 0, end = tile_height;
begin < layer_rows;
begin += tile_height, end += tile_height)
{
if (end > layer_rows)
end = layer_rows;
num = end - begin;
gegl_buffer_get (layer_buffer,
GEGL_RECTANGLE (0, begin, layer_cols, num), 1.0,
layer_format, layer_pixel,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
if (png_get_valid (pp, info, PNG_INFO_tRNS))
{
for (j = 0; j < num; j++)
{
fixed = layer_pixels[j];
for (k = 0; k < layer_cols; k++)
fixed[k] = (fixed[k * 2 + 1] > 127) ?
layer_remap[fixed[k * 2]] : 0;
}
}
else if (png_get_valid (pp, info, PNG_INFO_PLTE)
&& (layer_bpp == 2))
{
for (j = 0; j < num; j++)
{
fixed = layer_pixels[j];
for (k = 0; k < layer_cols; k++)
fixed[k] = fixed[k * 2];
}
}
png_write_rows (pp, layer_pixels, num);
}
}
g_object_unref (layer_buffer);
png_write_end (pp, info);
png_destroy_write_struct (&pp, &info);
g_free (layer_pixels);
g_free (layer_pixel);
fclose (outfile);
infile = g_fopen (g_file_peek_path (temp_file), "rb");
if (! infile)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_file_get_utf8_name (temp_file),
g_strerror (errno));
g_file_delete (temp_file, NULL, NULL);
goto err3;
}
fseek (infile, 8L, SEEK_SET);
while (!feof (infile))
{
guchar chunksize_chars[4];
gulong chunksize;
gchar chunkname[5];
guchar *chunkbuffer;
glong chunkwidth;
glong chunkheight;
gchar chunkbitdepth;
gchar chunkcolortype;
gchar chunkcompression;
gchar chunkfilter;
gchar chunkinterlaced;
if (fread (chunksize_chars, 1, 4, infile) != 4)
break;
if (fread (chunkname, 1, 4, infile) != 4)
break;
chunkname[4] = 0;
chunksize = ((chunksize_chars[0] << 24) |
(chunksize_chars[1] << 16) |
(chunksize_chars[2] << 8) |
(chunksize_chars[3]));
chunkbuffer = NULL;
if (chunksize > 0)
{
chunkbuffer = g_new (guchar, chunksize);
if (fread (chunkbuffer, 1, chunksize, infile) != chunksize)
break;
}
if (strncmp (chunkname, "IHDR", 4) == 0)
{
chunkwidth = ((chunkbuffer[0] << 24) |
(chunkbuffer[1] << 16) |
(chunkbuffer[2] << 8) |
(chunkbuffer[3]));
chunkheight = ((chunkbuffer[4] << 24) |
(chunkbuffer[5] << 16) |
(chunkbuffer[6] << 8) |
(chunkbuffer[7]));
chunkbitdepth = chunkbuffer[8];
chunkcolortype = chunkbuffer[9];
chunkcompression = chunkbuffer[10];
chunkfilter = chunkbuffer[11];
chunkinterlaced = chunkbuffer[12];
if (mng_putchunk_ihdr (handle, chunkwidth, chunkheight,
chunkbitdepth, chunkcolortype,
chunkcompression, chunkfilter,
chunkinterlaced) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_ihdr() "
"in mng_export_image()");
fclose (infile);
goto err3;
}
}
else if (strncmp (chunkname, "IDAT", 4) == 0)
{
if (mng_putchunk_idat (handle, chunksize,
chunkbuffer) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_idat() "
"in mng_export_image()");
fclose (infile);
goto err3;
}
}
else if (strncmp (chunkname, "IEND", 4) == 0)
{
if (mng_putchunk_iend (handle) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_iend() "
"in mng_export_image()");
fclose (infile);
goto err3;
}
}
else if (strncmp (chunkname, "PLTE", 4) == 0)
{
/* If this frame's palette is the same as the global palette,
* write a 0-color palette chunk.
*/
if (mng_putchunk_plte_wrapper (handle,
(layer_has_unique_palette ?
(chunksize / 3) : 0),
chunkbuffer) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_plte() "
"in mng_export_image()");
fclose (infile);
goto err3;
}
}
else if (strncmp (chunkname, "tRNS", 4) == 0)
{
if (mng_putchunk_trns_wrapper (handle,
chunksize,
chunkbuffer) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_trns() "
"in mng_export_image()");
fclose (infile);
goto err3;
}
}
if (chunksize > 0)
g_free (chunkbuffer);
/* read 4 bytes after the chunk */
fread (chunkname, 1, 4, infile);
}
fclose (infile);
g_file_delete (temp_file, NULL, NULL);
}
if (mng_putchunk_mend (handle) != MNG_NOERROR)
{
g_warning ("Unable to mng_putchunk_mend() in mng_export_image()");
goto err3;
}
if (mng_write (handle) != MNG_NOERROR)
{
g_warning ("Unable to mng_write() the image in mng_export_image()");
goto err3;
}
ret = TRUE;
err3:
mng_cleanup (&handle);
err2:
fclose (userdata->fp);
err:
g_free (userdata);
return ret;
}
/* The interactive dialog. */
static gboolean
mng_save_dialog (GimpImage *image,
GimpProcedure *procedure,
GObject *config)
{
GtkWidget *dialog;
GtkWidget *frame;
GtkWidget *hbox;
GtkListStore *store;
GtkWidget *combo;
GtkWidget *label;
GtkWidget *scale;
gint num_layers;
gboolean run;
dialog = gimp_export_procedure_dialog_new (GIMP_EXPORT_PROCEDURE (procedure),
GIMP_PROCEDURE_CONFIG (config),
image);
gimp_procedure_dialog_fill_box (GIMP_PROCEDURE_DIALOG (dialog),
"options-vbox", "interlaced",
"bkgd", "gama", "phys", "time",
NULL);
gimp_procedure_dialog_get_label (GIMP_PROCEDURE_DIALOG (dialog),
"options-label", _("MNG Options"),
FALSE, FALSE);
gimp_procedure_dialog_fill_frame (GIMP_PROCEDURE_DIALOG (dialog),
"options-frame", "options-label",
FALSE, "options-vbox");
g_free (gimp_image_get_layers (image, &num_layers));
if (num_layers == 1)
store = gimp_int_store_new (_("PNG"), CHUNKS_PNG_D,
_("JNG"), CHUNKS_JNG_D,
NULL);
else
store = gimp_int_store_new (_("PNG + delta PNG"), CHUNKS_PNG_D,
_("JNG + delta PNG"), CHUNKS_JNG_D,
_("All PNG"), CHUNKS_PNG,
_("All JNG"), CHUNKS_JNG,
NULL);
combo = gimp_procedure_dialog_get_int_combo (GIMP_PROCEDURE_DIALOG (dialog),
"default-chunks",
GIMP_INT_STORE (store));
gtk_widget_set_margin_bottom (combo, 6);
store = gimp_int_store_new (_("Combine"), DISPOSE_COMBINE,
_("Replace"), DISPOSE_REPLACE,
NULL);
combo = gimp_procedure_dialog_get_int_combo (GIMP_PROCEDURE_DIALOG (dialog),
"default-dispose",
GIMP_INT_STORE (store));
gtk_widget_set_margin_bottom (combo, 6);
scale = gimp_procedure_dialog_get_scale_entry (GIMP_PROCEDURE_DIALOG (dialog),
"png-compression", 1.0);
gtk_widget_set_margin_bottom (scale, 6);
scale = gimp_procedure_dialog_get_scale_entry (GIMP_PROCEDURE_DIALOG (dialog),
"jpeg-quality", 1.0);
gtk_widget_set_margin_bottom (scale, 6);
scale = gimp_procedure_dialog_get_scale_entry (GIMP_PROCEDURE_DIALOG (dialog),
"jpeg-smoothing", 1.0);
gtk_widget_set_margin_bottom (scale, 6);
/* MNG Animation Options */
label = gimp_procedure_dialog_get_label (GIMP_PROCEDURE_DIALOG (dialog),
"milliseconds-label",
_("milliseconds"), FALSE, FALSE);
gtk_widget_set_margin_start (label, 6);
hbox = gimp_procedure_dialog_fill_box (GIMP_PROCEDURE_DIALOG (dialog),
"animation-box", "default-delay",
"milliseconds-label", NULL);
gtk_orientable_set_orientation (GTK_ORIENTABLE (hbox),
GTK_ORIENTATION_HORIZONTAL);
gimp_procedure_dialog_fill_box (GIMP_PROCEDURE_DIALOG (dialog),
"mng-animation-box", "loop",
"animation-box", NULL);
gimp_procedure_dialog_get_label (GIMP_PROCEDURE_DIALOG (dialog),
"mng-animation-label",
_("Animated MNG Options"), FALSE, FALSE);
frame = gimp_procedure_dialog_fill_frame (GIMP_PROCEDURE_DIALOG (dialog),
"mng-animation-frame",
"mng-animation-label", FALSE,
"mng-animation-box");
if (num_layers <= 1)
{
gtk_widget_set_sensitive (frame, FALSE);
gimp_help_set_help_data (frame,
_("These options are only available when "
"the exported image has more than one "
"layer. The image you are exporting only has "
"one layer."),
NULL);
}
gimp_procedure_dialog_fill (GIMP_PROCEDURE_DIALOG (dialog),
"options-frame", "default-chunks",
"default-dispose", "png-compression",
"jpeg-quality", "jpeg-smoothing",
"mng-animation-frame", NULL);
gtk_widget_show (dialog);
run = gimp_procedure_dialog_run (GIMP_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}
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