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gimp/plug-ins/file-psd/psd-save.c

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/*
* PSD Export Plugin version 1.0 (BETA)
* This GIMP plug-in is designed to export Adobe Photoshop(tm) files (.PSD)
*
* Monigotes
*
* If this plug-in fails to export a file which you think it should,
* please tell me what seemed to go wrong, and anything you know
* about the image you tried to export. Please don't send big PSD
* files to me without asking first.
*
* Copyright (C) 2000 Monigotes
*
* 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/>.
*/
/*
* Adobe and Adobe Photoshop are trademarks of Adobe Systems
* Incorporated that may be registered in certain jurisdictions.
*/
/*
* Revision history:
*
* 2000.02 / v1.0 / Monigotes
* First version.
*
* 2003-05-10 Pedro Gimeno <pggimeno@wanadoo.es>
* - Cleaned up and GNUstylized.
* - Translated all comments and vars in Spanish to English.
*
* 2005-2-11 Jay Cox <jaycox@gimp.org>
* Rewrote all the code that deals with pixels to be stingy with
* memory and opperate on tile-size chunks. Create a flattened
* copy of the image when necessary. Fixes file corruption bug
* #167139 and memory bug #121871
*
* 2006-03-29 Guillermo S. Romero <gsr.bugs@infernal-iceberg.com>
* - Added/enabled basic support for layer masks based in psd.c
* and whatever was already here.
* Layers that are not canvas sized need investigation, here
* or in the import plugin something seems wrong.
* - Cosmetic changes about the debug messages, more like psd.c.
*/
/*
* TODO:
* Export preview
*/
/*
* BUGS:
*/
#include "config.h"
#include <errno.h>
#include <string.h>
#include <glib/gstdio.h>
#include "libgimp/gimp.h"
#include "libgimp/gimpui.h"
#include "psd-util.h"
#include "psd-save.h"
#include "libgimp/stdplugins-intl.h"
/* set to TRUE if you want debugging, FALSE otherwise */
#define DEBUG FALSE
/* 1: Normal debuggin, 2: Deep debuggin */
#define DEBUG_LEVEL 2
#define IFDBG if (DEBUG)
#define IF_DEEP_DBG if (DEBUG && DEBUG_LEVEL == 2)
#define PSD_UNIT_INCH 1
#define PSD_UNIT_CM 2
/* Local types etc
*/
typedef struct PsdLayerDimension
{
gint left;
gint top;
gint32 width;
gint32 height;
} PSD_Layer_Dimension;
typedef struct PsdImageData
{
gboolean compression;
gint32 image_height;
gint32 image_width;
GimpImageBaseType baseType;
gint32 merged_layer;/* Merged image,
to be used for the image data section */
gint nChannels; /* Number of user channels in the image */
gint32 *lChannels; /* User channels in the image */
gint nLayers; /* Number of layers in the image */
gint32 *lLayers; /* Identifier of each layer */
PSD_Layer_Dimension *layersDim; /* Dimensions of each layer */
} PSD_Image_Data;
static PSD_Image_Data PSDImageData;
/* Declare some local functions.
*/
static void psd_lmode_layer (gint32 idLayer,
gchar *psdMode);
static void reshuffle_cmap_write (guchar *mapGimp);
static void save_header (FILE *fd,
gint32 image_id);
static void save_color_mode_data (FILE *fd,
gint32 image_id);
static void save_resources (FILE *fd,
gint32 image_id);
static void save_layer_and_mask (FILE *fd,
gint32 image_id);
static void save_data (FILE *fd,
gint32 image_id);
static void xfwrite (FILE *fd,
gconstpointer buf,
glong len,
const gchar *why);
static void write_pascalstring (FILE *fd,
const gchar *val,
gint padding,
const gchar *why);
static void write_string (FILE *fd,
const gchar *val,
const gchar *why);
static void write_gchar (FILE *fd,
guchar val,
const gchar *why);
static void write_gint16 (FILE *fd,
gint16 val,
const gchar *why);
static void write_gint32 (FILE *fd,
gint32 val,
const gchar *why);
static void write_datablock_luni (FILE *fd,
const gchar *val,
const gchar *why);
static void write_pixel_data (FILE *fd,
gint32 drawableID,
glong *ChanLenPosition,
gint32 rowlenOffset);
static gint32 create_merged_image (gint32 imageID);
static const Babl* get_pixel_format (gint32 drawableID);
static const Babl* get_channel_format (gint32 drawableID);
static const Babl* get_mask_format (gint32 drawableID);
static void
psd_lmode_layer (gint32 idLayer,
gchar *psdMode)
{
switch (gimp_layer_get_mode (idLayer))
{
case GIMP_LAYER_MODE_NORMAL_LEGACY:
strcpy (psdMode, "norm");
break;
case GIMP_LAYER_MODE_DARKEN_ONLY:
case GIMP_LAYER_MODE_DARKEN_ONLY_LEGACY:
strcpy (psdMode, "dark");
break;
case GIMP_LAYER_MODE_LIGHTEN_ONLY:
case GIMP_LAYER_MODE_LIGHTEN_ONLY_LEGACY:
strcpy (psdMode, "lite");
break;
case GIMP_LAYER_MODE_LCH_HUE:
case GIMP_LAYER_MODE_HSV_HUE_LEGACY:
strcpy (psdMode, "hue ");
break;
case GIMP_LAYER_MODE_LCH_CHROMA:
case GIMP_LAYER_MODE_HSV_SATURATION_LEGACY:
strcpy (psdMode, "sat ");
break;
case GIMP_LAYER_MODE_LCH_COLOR:
case GIMP_LAYER_MODE_HSL_COLOR_LEGACY:
strcpy (psdMode, "colr");
break;
case GIMP_LAYER_MODE_ADDITION:
case GIMP_LAYER_MODE_ADDITION_LEGACY:
strcpy (psdMode, "lddg");
break;
case GIMP_LAYER_MODE_MULTIPLY:
case GIMP_LAYER_MODE_MULTIPLY_LEGACY:
strcpy (psdMode, "mul ");
break;
case GIMP_LAYER_MODE_SCREEN:
case GIMP_LAYER_MODE_SCREEN_LEGACY:
strcpy (psdMode, "scrn");
break;
case GIMP_LAYER_MODE_DISSOLVE:
strcpy (psdMode, "diss");
break;
case GIMP_LAYER_MODE_DIFFERENCE:
case GIMP_LAYER_MODE_DIFFERENCE_LEGACY:
strcpy (psdMode, "diff");
break;
case GIMP_LAYER_MODE_LCH_LIGHTNESS:
case GIMP_LAYER_MODE_HSV_VALUE_LEGACY: /* ? */
strcpy (psdMode, "lum ");
break;
case GIMP_LAYER_MODE_HARDLIGHT:
case GIMP_LAYER_MODE_HARDLIGHT_LEGACY:
strcpy (psdMode, "hLit");
break;
case GIMP_LAYER_MODE_OVERLAY_LEGACY:
case GIMP_LAYER_MODE_SOFTLIGHT_LEGACY:
strcpy (psdMode, "sLit");
break;
case GIMP_LAYER_MODE_OVERLAY:
strcpy (psdMode, "over");
break;
case GIMP_LAYER_MODE_DODGE:
case GIMP_LAYER_MODE_DODGE_LEGACY:
strcpy (psdMode, "div");
break;
case GIMP_LAYER_MODE_EXCLUSION:
strcpy (psdMode, "smud");
break;
case GIMP_LAYER_MODE_BURN:
case GIMP_LAYER_MODE_BURN_LEGACY:
strcpy (psdMode, "idiv");
break;
case GIMP_LAYER_MODE_LINEAR_BURN:
strcpy (psdMode, "lbrn");
break;
case GIMP_LAYER_MODE_LINEAR_LIGHT:
strcpy (psdMode, "lLit");
break;
case GIMP_LAYER_MODE_PIN_LIGHT:
strcpy (psdMode, "pLit");
break;
case GIMP_LAYER_MODE_VIVID_LIGHT:
strcpy (psdMode, "vLit");
break;
case GIMP_LAYER_MODE_HARD_MIX:
strcpy (psdMode, "hMix");
break;
default:
{
const gchar *nick = "?";
gimp_enum_get_value (GIMP_TYPE_LAYER_MODE,
gimp_layer_get_mode (idLayer),
NULL, &nick, NULL, NULL);
g_message (_("Unable to export layer with mode '%s'. Either the PSD "
"file format or the export plug-in does not support that, "
"using normal mode instead."), nick);
IFDBG printf ("PSD: Warning - unsupported layer-blend mode: %s, "
"using normal mode\n", nick);
strcpy (psdMode, "norm");
}
break;
}
}
static void
write_string (FILE *fd,
const gchar *val,
const gchar *why)
{
write_gchar (fd, strlen (val), why);
xfwrite (fd, val, strlen (val), why);
}
static void
write_pascalstring (FILE *fd,
const gchar *val,
gint padding,
const gchar *why)
{
guchar len;
gint i;
/* Calculate string length to write and limit it to 255 */
len = (strlen (val) > 255) ? 255 : (guchar) strlen (val);
/* Perform actual writing */
if (len != 0)
{
write_gchar (fd, len, why);
xfwrite (fd, val, len, why);
}
else
{
write_gchar (fd, 0, why);
}
/* If total length (length byte + content) is not a multiple of PADDING,
add zeros to pad it. */
len++; /* Add the length field */
if ((len % padding) == 0)
return;
for (i = 0; i < (padding - (len % padding)); i++)
write_gchar (fd, 0, why);
}
static void
xfwrite (FILE *fd,
gconstpointer buf,
glong len,
const gchar *why)
{
if (len == 0)
return;
if (fwrite (buf, len, 1, fd) == 0)
{
g_printerr ("%s: Error while writing '%s'\n", G_STRFUNC, why);
gimp_quit ();
}
}
static void
write_gchar (FILE *fd,
guchar val,
const gchar *why)
{
guchar b[2];
glong pos;
b[0] = val;
b[1] = 0;
pos = ftell (fd);
if (fwrite (&b, 1, 2, fd) == 0)
{
g_printerr ("%s: Error while writing '%s'\n", G_STRFUNC, why);
gimp_quit ();
}
fseek (fd, pos + 1, SEEK_SET);
}
static void
write_gint16 (FILE *fd,
gint16 val,
const gchar *why)
{
guchar b[2];
/* b[0] = val & 255;
b[1] = (val >> 8) & 255;*/
b[1] = val & 255;
b[0] = (val >> 8) & 255;
if (fwrite (&b, 1, 2, fd) == 0)
{
g_printerr ("%s: Error while writing '%s'\n", G_STRFUNC, why);
gimp_quit ();
}
}
static void
write_gint32 (FILE *fd,
gint32 val,
const gchar *why)
{
guchar b[4];
b[3] = val & 255;
b[2] = (val >> 8) & 255;
b[1] = (val >> 16) & 255;
b[0] = (val >> 24) & 255;
if (fwrite (&b, 1, 4, fd) == 0)
{
g_printerr ("%s: Error while writing '%s'\n", G_STRFUNC, why);
gimp_quit ();
}
}
static void
write_datablock_luni (FILE *fd,
const gchar *val,
const gchar *why)
{
if (val)
{
guint32 count;
guint32 xdBlockSize;
glong numchars;
gunichar2 *luniName;
luniName = g_utf8_to_utf16 (val, -1, NULL, &numchars, NULL);
if (luniName)
{
guchar len = MIN (numchars, 255);
/* Only pad to even num of chars */
if( len % 2 )
xdBlockSize = len + 1;
else
xdBlockSize = len;
/* 2 bytes / char + 4 bytes for pascal num chars */
xdBlockSize = (xdBlockSize * 2) + 4;
xfwrite (fd, "8BIMluni", 8, "luni xdb signature");
write_gint32 (fd, xdBlockSize, "luni xdb size");
write_gint32 (fd, len, "luni xdb pascal string");
for (count = 0; count < len; count++)
write_gint16 (fd, luniName[count], "luni xdb pascal string");
/* Pad to an even number of chars */
if (len % 2)
write_gint16 (fd, 0x0000, "luni xdb pascal string padding");
}
}
}
static gint32
pack_pb_line (guchar *start,
gint32 length,
gint32 stride,
guchar *dest_ptr)
{
gint32 remaining = length;
gint i, j;
length = 0;
while (remaining > 0)
{
/* Look for characters matching the first */
i = 0;
while ((i < 128) &&
(remaining - i > 0) &&
(start[0] == start[i*stride]))
i++;
if (i > 1) /* Match found */
{
*dest_ptr++ = -(i - 1);
*dest_ptr++ = *start;
start += i*stride;
remaining -= i;
length += 2;
}
else /* Look for characters different from the previous */
{
i = 0;
while ((i < 128) &&
(remaining - (i + 1) > 0) &&
(start[i*stride] != start[(i + 1)*stride] ||
remaining - (i + 2) <= 0 || start[i*stride] != start[(i+2)*stride]))
i++;
/* If there's only 1 remaining, the previous WHILE stmt doesn't
catch it */
if (remaining == 1)
{
i = 1;
}
if (i > 0) /* Some distinct ones found */
{
*dest_ptr++ = i - 1;
for (j = 0; j < i; j++)
{
*dest_ptr++ = start[j*stride];
}
start += i*stride;
remaining -= i;
length += i + 1;
}
}
}
return length;
}
static gint
gimpBaseTypeToPsdMode (GimpImageBaseType gimpBaseType)
{
switch (gimpBaseType)
{
case GIMP_RGB:
return 3; /* RGB */
case GIMP_GRAY:
return 1; /* Grayscale */
case GIMP_INDEXED:
return 2; /* Indexed */
default:
g_message (_("Error: Can't convert GIMP base imagetype to PSD mode"));
IFDBG printf ("PSD Export: gimpBaseType value is %d, "
"can't convert to PSD mode", gimpBaseType);
gimp_quit ();
return 3; /* Return RGB by default */
}
}
static gint
nChansLayer (gint gimpBaseType,
gint hasAlpha,
gint hasMask)
{
gint incAlpha = 0;
gint incMask = 0;
incAlpha = (hasAlpha == 0) ? 0 : 1;
incMask = (hasMask == 0) ? 0 : 1;
switch (gimpBaseType)
{
case GIMP_RGB:
return 3 + incAlpha + incMask; /* R,G,B & Alpha & Mask (if any) */
case GIMP_GRAY:
return 1 + incAlpha + incMask; /* G & Alpha & Mask (if any) */
case GIMP_INDEXED:
return 1 + incAlpha + incMask; /* I & Alpha & Mask (if any) */
default:
return 0; /* Return 0 channels by default */
}
}
static void
reshuffle_cmap_write (guchar *mapGimp)
{
guchar *mapPSD;
gint i;
mapPSD = g_malloc (768);
for (i = 0; i < 256; i++)
{
mapPSD[i] = mapGimp[i * 3];
mapPSD[i + 256] = mapGimp[i * 3 + 1];
mapPSD[i + 512] = mapGimp[i * 3 + 2];
}
for (i = 0; i < 768; i++)
{
mapGimp[i] = mapPSD[i];
}
g_free (mapPSD);
}
static void
save_header (FILE *fd,
gint32 image_id)
{
IFDBG printf (" Function: save_header\n");
IFDBG printf ("\tRows: %d\n", PSDImageData.image_height);
IFDBG printf ("\tColumns: %d\n", PSDImageData.image_width);
IFDBG printf ("\tBase type: %d\n", PSDImageData.baseType);
IFDBG printf ("\tNumber of channels: %d\n", PSDImageData.nChannels);
xfwrite (fd, "8BPS", 4, "signature");
write_gint16 (fd, 1, "version");
write_gint32 (fd, 0, "reserved 1"); /* 6 for the 'reserved' field + 4 bytes for a long */
write_gint16 (fd, 0, "reserved 1"); /* and 2 bytes for a short */
write_gint16 (fd, (PSDImageData.nChannels +
nChansLayer (PSDImageData.baseType,
gimp_drawable_has_alpha (PSDImageData.merged_layer), 0)),
"channels");
write_gint32 (fd, PSDImageData.image_height, "rows");
write_gint32 (fd, PSDImageData.image_width, "columns");
write_gint16 (fd, 8, "depth"); /* Exporting can only be done in 8 bits at the moment. */
write_gint16 (fd, gimpBaseTypeToPsdMode (PSDImageData.baseType), "mode");
}
static void
save_color_mode_data (FILE *fd,
gint32 image_id)
{
guchar *cmap;
guchar *cmap_modified;
gint i;
gint32 nColors;
IFDBG printf (" Function: save_color_mode_data\n");
switch (PSDImageData.baseType)
{
case GIMP_INDEXED:
IFDBG printf ("\tImage type: INDEXED\n");
cmap = gimp_image_get_colormap (image_id, &nColors);
IFDBG printf ("\t\tLength of colormap returned by gimp_image_get_colormap: %d\n", nColors);
if (nColors == 0)
{
IFDBG printf ("\t\tThe indexed image lacks a colormap\n");
write_gint32 (fd, 0, "color data length");
}
else if (nColors != 256)
{
IFDBG printf ("\t\tThe indexed image has %d!=256 colors\n", nColors);
IFDBG printf ("\t\tPadding with zeros up to 256\n");
write_gint32 (fd, 768, "color data length");
/* For this type, length is always 768 */
cmap_modified = g_malloc (768);
for (i = 0; i < nColors * 3; i++)
cmap_modified[i] = cmap[i];
for (i = nColors * 3; i < 768; i++)
cmap_modified[i] = 0;
reshuffle_cmap_write (cmap_modified);
xfwrite (fd, cmap_modified, 768, "colormap"); /* Write readjusted colormap */
g_free (cmap_modified);
}
else /* nColors equals 256 */
{
write_gint32 (fd, 768, "color data length"); /* For this type, length is always 768 */
reshuffle_cmap_write (cmap);
xfwrite (fd, cmap, 768, "colormap"); /* Write readjusted colormap */
}
break;
default:
IFDBG printf ("\tImage type: Not INDEXED\n");
write_gint32 (fd, 0, "color data length");
}
}
static void
save_resources (FILE *fd,
gint32 image_id)
{
gint i;
gchar *fileName; /* Image file name */
gint32 idActLayer; /* Id of the active layer */
guint nActiveLayer = 0; /* Number of the active layer */
gboolean ActiveLayerPresent; /* TRUE if there's an active layer */
glong eof_pos; /* Position for End of file */
glong rsc_pos; /* Position for Lengths of Resources section */
glong name_sec; /* Position for Lengths of Channel Names */
/* Only relevant resources in GIMP are: 0x03EE, 0x03F0 & 0x0400 */
/* For Adobe Photoshop version 4.0 these can also be considered:
0x0408, 0x040A & 0x040B (1006, 1008, 1024, 1032, 1034, and 1035) */
IFDBG printf (" Function: save_resources\n");
/* Get the image title from its filename */
fileName = gimp_image_get_filename (image_id);
IFDBG printf ("\tImage title: %s\n", fileName);
/* Get the active layer number id */
idActLayer = gimp_image_get_active_layer (image_id);
IFDBG printf ("\tCurrent layer id: %d\n", idActLayer);
ActiveLayerPresent = FALSE;
for (i = 0; i < PSDImageData.nLayers; i++)
if (idActLayer == PSDImageData.lLayers[i])
{
nActiveLayer = i;
ActiveLayerPresent = TRUE;
}
if (ActiveLayerPresent)
{
IFDBG printf ("\t\tActive layer is number %d\n", nActiveLayer);
}
else
{
IFDBG printf ("\t\tNo active layer\n");
}
/* Here's where actual writing starts */
rsc_pos = ftell (fd);
write_gint32 (fd, 0, "image resources length");
/* --------------- Write Channel names --------------- */
if (PSDImageData.nChannels > 0 ||
gimp_drawable_has_alpha (PSDImageData.merged_layer))
{
xfwrite (fd, "8BIM", 4, "imageresources signature");
write_gint16 (fd, 0x03EE, "0x03EE Id"); /* 1006 */
/* write_pascalstring (fd, Name, "Id name"); */
write_gint16 (fd, 0, "Id name"); /* Set to null string (two zeros) */
/* Mark current position in the file */
name_sec = ftell (fd);
write_gint32 (fd, 0, "0x03EE resource size");
/* Write all strings */
/* if the merged_image contains transparency, write a name for it first */
if (gimp_drawable_has_alpha (PSDImageData.merged_layer))
write_string (fd, "Transparency", "channel name");
for (i = PSDImageData.nChannels - 1; i >= 0; i--)
{
char *chName = gimp_item_get_name (PSDImageData.lChannels[i]);
write_string (fd, chName, "channel name");
g_free (chName);
}
/* Calculate and write actual resource's length */
eof_pos = ftell (fd);
fseek (fd, name_sec, SEEK_SET);
write_gint32 (fd, eof_pos - name_sec - sizeof (gint32), "0x03EE resource size");
IFDBG printf ("\tTotal length of 0x03EE resource: %d\n",
(int) (eof_pos - name_sec - sizeof (gint32)));
/* Return to EOF to continue writing */
fseek (fd, eof_pos, SEEK_SET);
/* Pad if length is odd */
if ((eof_pos - name_sec - sizeof (gint32)) & 1)
write_gchar (fd, 0, "pad byte");
}
/* --------------- Write Guides --------------- */
if (gimp_image_find_next_guide(image_id, 0))
{
gint n_guides = 0;
gint guide_id =0;
/* Count the guides */
while ((guide_id = gimp_image_find_next_guide(image_id, guide_id)))
n_guides++;
xfwrite (fd, "8BIM", 4, "imageresources signature");
write_gint16 (fd, 0x0408, "0x0408 Id (Guides)"); /* 1032 */
/* write_pascalstring (fd, Name, "Id name"); */
write_gint16 (fd, 0, "Id name"); /* Set to null string (two zeros) */
write_gint32 (fd, 16 + 5 * n_guides, "0x0408 resource size");
/* Save grid and guide header */
write_gint32 (fd, 1, "grid/guide header version");
write_gint32 (fd, 576, "grid custom spacing horizontal");/* dpi*32/4??*/
write_gint32 (fd, 576, "grid custom spacing vertical"); /* dpi*32/4??*/
write_gint32 (fd, n_guides, "number of guides");
/* write the guides */
while ((guide_id = gimp_image_find_next_guide(image_id, guide_id)))
{
gchar orientation;
gint32 position;
orientation = gimp_image_get_guide_orientation(image_id, guide_id);
position = 32 * gimp_image_get_guide_position(image_id, guide_id);
orientation ^= 1; /* in the psd vert =0 , horiz = 1 */
write_gint32 (fd, position, "Position of guide");
write_gchar (fd, orientation, "Orientation of guide");
n_guides--;
}
if ((ftell(fd) & 1))
write_gchar(fd, 0, "pad byte");
if (n_guides != 0)
g_warning("Screwed up guide resource:: wrong number of guides\n");
IFDBG printf ("\tTotal length of 0x0400 resource: %d\n", (int) sizeof (gint16));
}
/* --------------- Write resolution data ------------------- */
{
gdouble xres = 0, yres = 0;
guint32 xres_fix, yres_fix;
GimpUnit g_unit;
gint16 psd_unit;
g_unit = gimp_image_get_unit (image_id);
gimp_image_get_resolution (image_id, &xres, &yres);
if (g_unit == GIMP_UNIT_MM)
{
gdouble factor = gimp_unit_get_factor (g_unit) / 10.0;
xres /= factor;
yres /= factor;
psd_unit = PSD_UNIT_CM;
}
else
{
psd_unit = PSD_UNIT_INCH;
}
xres_fix = xres * 65536.0 + .5; /* Convert to 16.16 fixed point */
yres_fix = yres * 65536.0 + .5; /* Convert to 16.16 fixed point */
xfwrite (fd, "8BIM", 4, "imageresources signature (for resolution)");
write_gint16(fd, 0x03ed, "0x03ed Id (resolution)"); /* 1005 */
write_gint16 (fd, 0, "Id name"); /* Set to null string (two zeros) */
write_gint32 (fd, 16, "0x0400 resource size");
write_gint32 (fd, xres_fix, "hRes (16.16 fixed point)");
write_gint16 (fd, psd_unit, "hRes unit");
write_gint16 (fd, psd_unit, "width unit");
write_gint32 (fd, yres_fix, "vRes (16.16 fixed point)");
write_gint16 (fd, psd_unit, "vRes unit");
write_gint16 (fd, psd_unit, "height unit");
}
/* --------------- Write Active Layer Number --------------- */
if (ActiveLayerPresent)
{
xfwrite (fd, "8BIM", 4, "imageresources signature");
write_gint16 (fd, 0x0400, "0x0400 Id"); /* 1024 */
/* write_pascalstring (fd, Name, "Id name"); */
write_gint16 (fd, 0, "Id name"); /* Set to null string (two zeros) */
write_gint32 (fd, sizeof (gint16), "0x0400 resource size");
/* Save title as gint16 (length always even) */
write_gint16 (fd, nActiveLayer, "active layer");
IFDBG printf ("\tTotal length of 0x0400 resource: %d\n", (int) sizeof (gint16));
}
/* --------------- Write ICC profile data ------------------- */
{
GimpColorProfile *profile;
profile = gimp_image_get_color_profile (image_id);
if (profile)
{
const guint8 *icc_data;
gsize icc_length;
icc_data = gimp_color_profile_get_icc_profile (profile, &icc_length);
xfwrite (fd, "8BIM", 4, "imageresources signature");
write_gint16 (fd, 0x040f, "0x040f Id");
write_gint16 (fd, 0, "Id name"); /* Set to null string (two zeros) */
write_gint32 (fd, icc_length, "0x040f resource size");
xfwrite (fd, icc_data, icc_length, "ICC profile");
g_object_unref (profile);
}
}
/* --------------- Write Total Section Length --------------- */
eof_pos = ftell (fd);
fseek (fd, rsc_pos, SEEK_SET);
write_gint32 (fd, eof_pos - rsc_pos - sizeof (gint32), "image resources length");
IFDBG printf ("\tResource section total length: %d\n",
(int) (eof_pos - rsc_pos - sizeof (gint32)));
/* Return to EOF to continue writing */
fseek (fd, eof_pos, SEEK_SET);
}
static int
get_compress_channel_data (guchar *channel_data,
gint32 channel_cols,
gint32 channel_rows,
gint32 stride,
gint16 *LengthsTable,
guchar *remdata)
{
gint i;
gint32 len; /* Length of compressed data */
guchar *start; /* Starting position of a row in channel_data */
/* For every row in the channel */
len = 0;
for (i = 0; i < channel_rows; i++)
{
start = channel_data + (i * channel_cols * stride);
/* Create packed data for this row */
LengthsTable[i] = pack_pb_line (start, channel_cols, stride,
&remdata[len]);
len += LengthsTable[i];
}
/* return((len + channel_rows * sizeof (gint16)) + sizeof (gint16));*/
return len;
}
static void
save_layer_and_mask (FILE *fd,
gint32 image_id)
{
gint i,j;
gint idChannel;
gint offset_x; /* X offset for each layer */
gint offset_y; /* Y offset for each layer */
gint32 layerWidth; /* Width of each layer */
gint32 layerHeight; /* Height of each layer */
gchar blendMode[5]; /* Blending mode of the layer */
guchar layerOpacity; /* Opacity of the layer */
guchar flags; /* Layer flags */
gint nChannelsLayer; /* Number of channels of a layer */
gint32 ChanSize; /* Data length for a channel */
gchar *layerName; /* Layer name */
gint mask; /* Layer mask */
glong eof_pos; /* Position: End of file */
glong ExtraDataPos; /* Position: Extra data length */
glong LayerMaskPos; /* Position: Layer & Mask section length */
glong LayerInfoPos; /* Position: Layer info section length*/
glong **ChannelLengthPos; /* Position: Channel length */
IFDBG printf (" Function: save_layer_and_mask\n");
/* Create first array dimension (layers, channels) */
ChannelLengthPos = g_newa (glong *, PSDImageData.nLayers);
/* Layer and mask information section */
LayerMaskPos = ftell (fd);
write_gint32 (fd, 0, "layers & mask information length");
/* Layer info section */
LayerInfoPos = ftell (fd);
write_gint32 (fd, 0, "layers info section length");
/* Layer structure section */
if (gimp_drawable_has_alpha (PSDImageData.merged_layer))
write_gint16 (fd, -PSDImageData.nLayers, "Layer structure count");
else
write_gint16 (fd, PSDImageData.nLayers, "Layer structure count");
/* Layer records section */
/* GIMP layers must be written in reverse order */
for (i = PSDImageData.nLayers - 1; i >= 0; i--)
{
gint hasMask = 0;
gimp_drawable_offsets (PSDImageData.lLayers[i], &offset_x, &offset_y);
layerWidth = gimp_drawable_width (PSDImageData.lLayers[i]);
layerHeight = gimp_drawable_height (PSDImageData.lLayers[i]);
PSDImageData.layersDim[i].left = offset_x;
PSDImageData.layersDim[i].top = offset_y;
PSDImageData.layersDim[i].width = layerWidth;
PSDImageData.layersDim[i].height = layerHeight;
IFDBG printf ("\tLayer number: %d\n", i);
IFDBG printf ("\t\tX offset: %d\n", PSDImageData.layersDim[i].left);
IFDBG printf ("\t\tY offset: %d\n", PSDImageData.layersDim[i].top);
IFDBG printf ("\t\tWidth: %d\n", PSDImageData.layersDim[i].width);
IFDBG printf ("\t\tHeight: %d\n", PSDImageData.layersDim[i].height);
write_gint32 (fd, PSDImageData.layersDim[i].top, "Layer top");
write_gint32 (fd, PSDImageData.layersDim[i].left, "Layer left");
write_gint32 (fd, (PSDImageData.layersDim[i].height +
PSDImageData.layersDim[i].top), "Layer bottom");
write_gint32 (fd, (PSDImageData.layersDim[i].width +
PSDImageData.layersDim[i].left), "Layer right");
hasMask = (gimp_layer_get_mask(PSDImageData.lLayers[i]) == -1 ) ? 0 : 1;
nChannelsLayer = nChansLayer (PSDImageData.baseType,
gimp_drawable_has_alpha (PSDImageData.lLayers[i]),
hasMask);
write_gint16 (fd, nChannelsLayer, "Number channels in the layer");
IFDBG printf ("\t\tNumber of channels: %d\n", nChannelsLayer);
/* Create second array dimension (layers, channels) */
ChannelLengthPos[i] = g_new (glong, nChannelsLayer);
/* Try with gimp_drawable_bpp() */
for (j = 0; j < nChannelsLayer; j++)
{
if (gimp_drawable_has_alpha (PSDImageData.lLayers[i]))
idChannel = j - 1;
else
idChannel = j;
if (hasMask && (j+1 == nChannelsLayer)) /* Last channel ... */
idChannel = -2; /* ... will be layer mask */
write_gint16 (fd, idChannel, "Channel ID");
IFDBG printf ("\t\t\tChannel Identifier: %d\n", idChannel);
/* Write the length assuming no compression. In case there is,
will modify it later when writing data. */
ChannelLengthPos[i][j] = ftell (fd);
ChanSize = sizeof (gint16) + (PSDImageData.layersDim[i].width *
PSDImageData.layersDim[i].height);
write_gint32 (fd, ChanSize, "Channel Size");
IFDBG printf ("\t\t\tLength: %d\n", ChanSize);
}
xfwrite (fd, "8BIM", 4, "blend mode signature");
psd_lmode_layer (PSDImageData.lLayers[i], blendMode);
IFDBG printf ("\t\tBlend mode: %s\n", blendMode);
xfwrite (fd, blendMode, 4, "blend mode key");
layerOpacity = (gimp_layer_get_opacity (PSDImageData.lLayers[i]) * 255.0) / 100.0;
IFDBG printf ("\t\tOpacity: %u\n", layerOpacity);
write_gchar (fd, layerOpacity, "Opacity");
/* Apparently this field is not used in GIMP */
write_gchar (fd, 0, "Clipping");
flags = 0;
if (gimp_layer_get_lock_alpha (PSDImageData.lLayers[i])) flags |= 1;
if (! gimp_item_get_visible (PSDImageData.lLayers[i])) flags |= 2;
IFDBG printf ("\t\tFlags: %u\n", flags);
write_gchar (fd, flags, "Flags");
/* Padding byte to make the length even */
write_gchar (fd, 0, "Filler");
ExtraDataPos = ftell (fd); /* Position of Extra Data size */
write_gint32 (fd, 0, "Extra data size");
mask = gimp_layer_get_mask (PSDImageData.lLayers[i]);
if (mask >= 0)
{
gboolean apply = gimp_layer_get_apply_mask (PSDImageData.lLayers[i]);
IFDBG printf ("\t\tLayer mask size: %d\n", 20);
write_gint32 (fd, 20, "Layer mask size");
write_gint32 (fd, 0, "Layer mask top");
write_gint32 (fd, 0, "Layer mask left");
write_gint32 (fd, gimp_drawable_height(mask),"Layer mask bottom");
write_gint32 (fd, gimp_drawable_width(mask), "Layer mask right");
write_gchar (fd, 0, "Layer mask default color");
flags = (1 | /* position relative to layer */
(apply ? 0 : 1) << 1 | /* layer mask disabled */
0 << 2); /* invert layer mask */
write_gchar (fd, flags, "Layer mask flags");
write_gint16 (fd, 0, "Layer mask Padding");
}
else
{
/* NOTE Writing empty Layer mask / adjustment layer data */
write_gint32 (fd, 0, "Layer mask size");
IFDBG printf ("\t\tLayer mask size: %d\n", 0);
}
/* NOTE Writing empty Layer blending ranges data */
write_gint32 (fd, 0, "Layer blending size");
IFDBG printf ("\t\tLayer blending size: %d\n", 0);
layerName = gimp_item_get_name (PSDImageData.lLayers[i]);
write_pascalstring (fd, layerName, 4, "layer name");
IFDBG printf ("\t\tLayer name: %s\n", layerName);
/* Additional layer information blocks */
/* Unicode layer name */
write_datablock_luni(fd, layerName, "luni extra data block");
/* Layer color tag */
xfwrite (fd, "8BIMlclr", 8, "sheet color signature");
write_gint32 (fd, 8, "sheet color size");
write_gint16 (fd,
gimp_to_psd_layer_color_tag(gimp_item_get_color_tag(PSDImageData.lLayers[i])),
"sheet color code");
write_gint16 (fd, 0, "sheet color unused value");
write_gint16 (fd, 0, "sheet color unused value");
write_gint16 (fd, 0, "sheet color unused value");
/* Write real length for: Extra data */
eof_pos = ftell (fd);
fseek (fd, ExtraDataPos, SEEK_SET);
write_gint32 (fd, eof_pos - ExtraDataPos - sizeof (gint32), "Extra data size");
IFDBG printf ("\t\tExtraData size: %d\n",
(int) (eof_pos - ExtraDataPos - sizeof (gint32)));
/* Return to EOF to continue writing */
fseek (fd, eof_pos, SEEK_SET);
}
/* Channel image data section */
/* Gimp layers must be written in reverse order */
for (i = PSDImageData.nLayers - 1; i >= 0; i--)
{
IFDBG printf ("\t\tWriting pixel data for layer slot %d\n", i);
write_pixel_data(fd, PSDImageData.lLayers[i], ChannelLengthPos[i], 0);
g_free (ChannelLengthPos[i]);
}
eof_pos = ftell (fd);
/* Write actual size of Layer info section */
fseek (fd, LayerInfoPos, SEEK_SET);
write_gint32 (fd, eof_pos - LayerInfoPos - sizeof (gint32), "layers info section length");
IFDBG printf ("\t\tTotal layers info section length: %d\n",
(int) (eof_pos - LayerInfoPos - sizeof (gint32)));
/* Write actual size of Layer and mask information section */
fseek (fd, LayerMaskPos, SEEK_SET);
write_gint32 (fd, eof_pos - LayerMaskPos - sizeof (gint32), "layers & mask information length");
IFDBG printf ("\t\tTotal layers & mask information length: %d\n",
(int) (eof_pos - LayerMaskPos - sizeof (gint32)));
/* Return to EOF to continue writing */
fseek (fd, eof_pos, SEEK_SET);
}
static void
write_pixel_data (FILE *fd,
gint32 drawableID,
glong *ChanLenPosition,
gint32 ltable_offset)
{
GeglBuffer *buffer = gimp_drawable_get_buffer (drawableID);
const Babl *format;
gint32 tile_height = gimp_tile_height ();
gint32 height = gegl_buffer_get_height (buffer);
gint32 width = gegl_buffer_get_width (buffer);
gint32 bytes;
gint32 colors;
gint32 y;
gint32 len; /* Length of compressed data */
gint16 *LengthsTable; /* Lengths of every compressed row */
guchar *rledata; /* Compressed data from a region */
guchar *data; /* Temporary copy of pixel data */
glong length_table_pos; /* position in file of the length table */
int i, j;
IFDBG printf (" Function: write_pixel_data, drw %d, lto %d\n",
drawableID, ltable_offset);
if (gimp_item_is_channel (drawableID))
format = get_channel_format (drawableID);
else
format = get_pixel_format (drawableID);
bytes = babl_format_get_bytes_per_pixel (format);
colors = bytes;
if (gimp_drawable_has_alpha (drawableID) &&
! gimp_drawable_is_indexed (drawableID))
colors -= 1;
LengthsTable = g_new (gint16, height);
rledata = g_new (guchar, (MIN (height, tile_height) *
(width + 10 + (width / 100))));
data = g_new (guchar, MIN (height, tile_height) * width * bytes);
for (i = 0; i < bytes; i++)
{
gint chan;
len = 0;
if (bytes != colors && ltable_offset == 0) /* Need to write alpha channel first, except in image data section */
{
if (i == 0)
{
chan = bytes - 1;
}
else
{
chan = i - 1;
}
}
else
{
chan = i;
}
if (ChanLenPosition)
{
write_gint16 (fd, 1, "Compression type (RLE)");
len += 2;
}
if (ltable_offset > 0)
{
length_table_pos = ltable_offset + 2 * chan * height;
}
else
{
length_table_pos = ftell(fd);
xfwrite (fd, LengthsTable, height * sizeof(gint16),
"Dummy RLE length");
len += height * sizeof(gint16);
IF_DEEP_DBG printf ("\t\t\t\t. ltable, pos %ld len %d\n", length_table_pos, len);
}
for (y = 0; y < height; y += tile_height)
{
int tlen;
gegl_buffer_get (buffer,
GEGL_RECTANGLE (0, y,
width,
MIN (height - y, tile_height)),
1.0, format, data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
tlen = get_compress_channel_data (&data[chan],
width,
MIN(height - y, tile_height),
bytes,
&LengthsTable[y],
rledata);
len += tlen;
xfwrite (fd, rledata, tlen, "Compressed pixel data");
IF_DEEP_DBG printf ("\t\t\t\t. Writing compressed pixels, stream of %d\n", tlen);
}
/* Write compressed lengths table */
fseek (fd, length_table_pos, SEEK_SET);
for (j = 0; j < height; j++) /* write real length table */
write_gint16 (fd, LengthsTable[j], "RLE length");
if (ChanLenPosition) /* Update total compressed length */
{
fseek (fd, ChanLenPosition[i], SEEK_SET);
write_gint32 (fd, len, "channel data length");
IFDBG printf ("\t\tUpdating data len to %d\n", len);
}
fseek (fd, 0, SEEK_END);
IF_DEEP_DBG printf ("\t\t\t\t. Cur pos %ld\n", ftell(fd));
}
/* Write layer mask, as last channel, id -2 */
if (gimp_item_is_layer (drawableID))
{
gint32 maskID = gimp_layer_get_mask (drawableID);
if (maskID != -1)
{
GeglBuffer *mbuffer = gimp_drawable_get_buffer (maskID);
const Babl *mformat = get_mask_format(maskID);
len = 0;
if (ChanLenPosition)
{
write_gint16 (fd, 1, "Compression type (RLE)");
len += 2;
IF_DEEP_DBG printf ("\t\t\t\t. ChanLenPos, len %d\n", len);
}
if (ltable_offset > 0)
{
length_table_pos = ltable_offset + 2 * (bytes+1) * height;
IF_DEEP_DBG printf ("\t\t\t\t. ltable, pos %ld\n",
length_table_pos);
}
else
{
length_table_pos = ftell(fd);
xfwrite (fd, LengthsTable, height * sizeof(gint16),
"Dummy RLE length");
len += height * sizeof(gint16);
IF_DEEP_DBG printf ("\t\t\t\t. ltable, pos %ld len %d\n",
length_table_pos, len);
}
for (y = 0; y < height; y += tile_height)
{
int tlen;
gegl_buffer_get (mbuffer,
GEGL_RECTANGLE (0, y,
width,
MIN (height - y, tile_height)),
1.0, mformat, data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
tlen = get_compress_channel_data (&data[0],
width,
MIN(height - y, tile_height),
1,
&LengthsTable[y],
rledata);
len += tlen;
xfwrite (fd, rledata, tlen, "Compressed mask data");
IF_DEEP_DBG printf ("\t\t\t\t. Writing compressed mask, stream of %d\n", tlen);
}
/* Write compressed lengths table */
fseek (fd, length_table_pos, SEEK_SET); /*POS WHERE???*/
for (j = 0; j < height; j++) /* write real length table */
{
write_gint16 (fd, LengthsTable[j], "RLE length");
IF_DEEP_DBG printf ("\t\t\t\t. Updating RLE len %d\n",
LengthsTable[j]);
}
if (ChanLenPosition) /* Update total compressed length */
{
fseek (fd, ChanLenPosition[bytes], SEEK_SET); /*+bytes OR SOMETHING*/
write_gint32 (fd, len, "channel data length");
IFDBG printf ("\t\tUpdating data len to %d, at %ld\n", len, ftell(fd));
}
fseek (fd, 0, SEEK_END);
IF_DEEP_DBG printf ("\t\t\t\t. Cur pos %ld\n", ftell(fd));
g_object_unref (mbuffer);
}
}
g_object_unref (buffer);
g_free (data);
g_free (rledata);
g_free (LengthsTable);
}
static void
save_data (FILE *fd,
gint32 image_id)
{
gint ChanCount;
gint i, j;
gint32 imageHeight; /* Height of image */
glong offset; /* offset in file of rle lengths */
gint chan;
IFDBG printf (" Function: save_data\n");
ChanCount = (PSDImageData.nChannels +
nChansLayer (PSDImageData.baseType,
gimp_drawable_has_alpha (PSDImageData.merged_layer),
0));
imageHeight = gimp_image_height (image_id);
write_gint16 (fd, 1, "RLE compression");
/* All line lengths go before the rle pixel data */
offset = ftell(fd); /* Offset in file of line lengths */
for (i = 0; i < ChanCount; i++)
for (j = 0; j < imageHeight; j++)
write_gint16 (fd, 0, "junk line lengths");
IFDBG printf ("\t\tWriting compressed image data\n");
write_pixel_data (fd, PSDImageData.merged_layer,
NULL, offset);
chan = nChansLayer (PSDImageData.baseType,
gimp_drawable_has_alpha(PSDImageData.merged_layer), 0);
for (i = PSDImageData.nChannels - 1; i >= 0; i--)
{
IFDBG printf ("\t\tWriting compressed channel data for channel %d\n",
i);
write_pixel_data (fd, PSDImageData.lChannels[i], NULL,
offset + 2*imageHeight*chan); //check how imgs are channels here
chan++;
}
}
static gint32
create_merged_image (gint32 image_id)
{
gint32 projection;
projection = gimp_layer_new_from_visible (image_id, image_id, "psd-save");
if (gimp_image_base_type (image_id) != GIMP_INDEXED)
{
GeglBuffer *buffer = gimp_drawable_get_buffer (projection);
const Babl *format = get_pixel_format (projection);
gboolean transparency_found = FALSE;
gint bpp = babl_format_get_bytes_per_pixel (format);
gint n_components = babl_format_get_n_components (format);
gint width = gegl_buffer_get_width (buffer);
gint height = gegl_buffer_get_height (buffer);
GeglBufferIterator *iter = gegl_buffer_iterator_new (buffer, GEGL_RECTANGLE (0, 0, width, height),
0, format,
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
guchar *data = iter->data[0];
gint y;
for (y = 0; y < iter->roi->height; y++)
{
guchar *d = data;
gint x;
for (x = 0; x < iter->roi->width; x++)
{
gint32 alpha = d[bpp - 1];
if (alpha < 255)
{
gint i;
transparency_found = TRUE;
/* blend against white, photoshop does this. */
for (i = 0; i < bpp - 1; i++)
d[i] = ((guint32) d[i] * alpha) / 255 + 255 - alpha;
}
}
d += bpp;
}
data += n_components;
}
g_object_unref (buffer);
if (! transparency_found)
gimp_layer_flatten (projection);
}
else
{
if (gimp_drawable_has_alpha (projection))
gimp_layer_flatten (projection); /* PSDs don't support transparency information in indexed images*/
}
return projection;
}
static void
get_image_data (FILE *fd,
gint32 image_id)
{
IFDBG printf (" Function: get_image_data\n");
PSDImageData.compression = FALSE;
PSDImageData.image_height = gimp_image_height (image_id);
IFDBG printf ("\tGot number of rows: %d\n", PSDImageData.image_height);
PSDImageData.image_width = gimp_image_width (image_id);
IFDBG printf ("\tGot number of cols: %d\n", PSDImageData.image_width);
PSDImageData.baseType = gimp_image_base_type (image_id);
IFDBG printf ("\tGot base type: %d\n", PSDImageData.baseType);
PSDImageData.merged_layer = create_merged_image (image_id);
PSDImageData.lChannels = gimp_image_get_channels (image_id,
&PSDImageData.nChannels);
IFDBG printf ("\tGot number of channels: %d\n", PSDImageData.nChannels);
PSDImageData.lLayers = gimp_image_get_layers (image_id,
&PSDImageData.nLayers);
IFDBG printf ("\tGot number of layers: %d\n", PSDImageData.nLayers);
PSDImageData.layersDim = g_new (PSD_Layer_Dimension, PSDImageData.nLayers);
}
gboolean
save_image (const gchar *filename,
gint32 image_id,
GError **error)
{
FILE *fd;
gint32 *layers;
gint nlayers;
gint i;
GeglBuffer *buffer;
IFDBG printf (" Function: save_image\n");
if (gimp_image_width (image_id) > 30000 ||
gimp_image_height (image_id) > 30000)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Unable to export '%s'. The PSD file format does not "
"support images that are more than 30,000 pixels wide "
"or tall."),
gimp_filename_to_utf8 (filename));
return FALSE;
}
/* Need to check each of the layers size individually also */
layers = gimp_image_get_layers (image_id, &nlayers);
for (i = 0; i < nlayers; i++)
{
buffer = gimp_drawable_get_buffer (layers[i]);
if (gegl_buffer_get_width (buffer) > 30000 || gegl_buffer_get_height (buffer) > 30000)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Unable to export '%s'. The PSD file format does not "
"support images with layers that are more than 30,000 "
"pixels wide or tall."),
gimp_filename_to_utf8 (filename));
g_free (layers);
return FALSE;
}
g_object_unref (buffer);
}
g_free (layers);
gimp_progress_init_printf (_("Exporting '%s'"),
gimp_filename_to_utf8 (filename));
fd = g_fopen (filename, "wb");
if (fd == NULL)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return FALSE;
}
IFDBG g_print ("\tFile '%s' has been opened\n",
gimp_filename_to_utf8 (filename));
get_image_data (fd, image_id);
save_header (fd, image_id);
save_color_mode_data (fd, image_id);
save_resources (fd, image_id);
/* PSD format does not support layers in indexed images */
if (PSDImageData.baseType == GIMP_INDEXED)
write_gint32 (fd, 0, "layers info section length");
else
save_layer_and_mask (fd, image_id);
/* If this is an indexed image, write now channel and layer info */
save_data (fd, image_id);
/* Delete merged image now */
gimp_item_delete (PSDImageData.merged_layer);
IFDBG printf ("----- Closing PSD file, done -----\n\n");
fclose (fd);
return TRUE;
}
static const Babl *
get_pixel_format (gint32 drawableID)
{
const Babl *format;
switch (gimp_drawable_type (drawableID))
{
case GIMP_GRAY_IMAGE:
format = babl_format ("Y' u8");
break;
case GIMP_GRAYA_IMAGE:
format = babl_format ("Y'A u8");
break;
case GIMP_RGB_IMAGE:
format = babl_format ("R'G'B' u8");
break;
case GIMP_RGBA_IMAGE:
format = babl_format ("R'G'B'A u8");
break;
case GIMP_INDEXED_IMAGE:
case GIMP_INDEXEDA_IMAGE:
format = gimp_drawable_get_format(drawableID);
break;
default:
return NULL;
break;
}
return format;
}
static const Babl *
get_channel_format (gint32 drawableID)
{
const Babl *format;
/* eventually we'll put a switch statement for bit depth here to
* support higher depth exports */
format = babl_format ("Y u8");
return format;
}
static const Babl *
get_mask_format (gint32 drawableID)
{
const Babl *format;
/* eventually we'll put a switch statement for bit depth here to
* support higher depth exports */
format = babl_format ("Y u8");
return format;
}
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