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

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* GIMP Plug-in for Windows Icon files.
* Copyright (C) 2002 Christian Kreibich <christian@whoop.org>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <errno.h>
#include <string.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <png.h>
/* #define ICO_DBG */
#include "ico.h"
#include "ico-load.h"
#include "ico-save.h"
#include "ico-dialog.h"
#include "libgimp/stdplugins-intl.h"
static gint ico_write_int8 (FILE *fp,
guint8 *data,
gint count);
static gint ico_write_int16 (FILE *fp,
guint16 *data,
gint count);
static gint ico_write_int32 (FILE *fp,
guint32 *data,
gint count);
/* Helpers to set bits in a *cleared* data chunk */
static void ico_set_bit_in_data (guint8 *data,
gint line_width,
gint bit_num,
gint bit_val);
static void ico_set_nibble_in_data (guint8 *data,
gint line_width,
gint nibble_num,
gint nibble_val);
static void ico_set_byte_in_data (guint8 *data,
gint line_width,
gint byte_num,
gint byte_val);
static gint ico_get_layer_num_colors (gint32 layer,
gboolean *uses_alpha_levels);
static void ico_image_get_reduced_buf (guint32 layer,
gint bpp,
gint *num_colors,
guchar **cmap_out,
guchar **buf_out);
static gint
ico_write_int32 (FILE *fp,
guint32 *data,
gint count)
{
gint total;
total = count;
if (count > 0)
{
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
gint i;
for (i = 0; i < count; i++)
data[i] = GUINT32_FROM_LE (data[i]);
#endif
ico_write_int8 (fp, (guint8 *) data, count * 4);
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
/* Put it back like we found it */
for (i = 0; i < count; i++)
data[i] = GUINT32_FROM_LE (data[i]);
#endif
}
return total * 4;
}
static gint
ico_write_int16 (FILE *fp,
guint16 *data,
gint count)
{
gint total;
total = count;
if (count > 0)
{
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
gint i;
for (i = 0; i < count; i++)
data[i] = GUINT16_FROM_LE (data[i]);
#endif
ico_write_int8 (fp, (guint8 *) data, count * 2);
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
/* Put it back like we found it */
for (i = 0; i < count; i++)
data[i] = GUINT16_FROM_LE (data[i]);
#endif
}
return total * 2;
}
static gint
ico_write_int8 (FILE *fp,
guint8 *data,
gint count)
{
gint total;
gint bytes;
total = count;
while (count > 0)
{
bytes = fwrite ((gchar *) data, sizeof (gchar), count, fp);
if (bytes <= 0) /* something bad happened */
break;
count -= bytes;
data += bytes;
}
return total;
}
static void
ico_save_init (gint32 image_ID, IcoSaveInfo *info)
{
gint *layers;
gint i, num_colors;
gboolean uses_alpha_values;
layers = gimp_image_get_layers (image_ID, &info->num_icons);
info->layers = layers;
info->depths = g_new (gint, info->num_icons);
info->default_depths = g_new (gint, info->num_icons);
info->compress = g_new (gboolean, info->num_icons);
/* Limit the color depths to values that don't cause any color loss --
the user should pick these anyway, so we can save her some time.
If the user wants to lose some colors, the settings can always be changed
in the dialog: */
for (i = 0; i < info->num_icons; i++)
{
num_colors = ico_get_layer_num_colors (layers[i], &uses_alpha_values);
if (!uses_alpha_values)
{
if (num_colors <= 2)
{
/* Let's suggest monochrome */
info->default_depths [i] = 1;
}
else if (num_colors <= 16)
{
/* Let's suggest 4bpp */
info->default_depths [i] = 4;
}
else if (num_colors <= 256)
{
/* Let's suggest 8bpp */
info->default_depths [i] = 8;
}
else
{
/* Let's suggest 24bpp */
info->default_depths [i] = 24;
}
}
else
{
/* Otherwise, or if real alpha levels are used, stick with 32bpp */
info->default_depths [i] = 32;
}
/* vista icons */
if (gimp_drawable_width (layers[i]) > 255
|| gimp_drawable_height (layers[i]) > 255 )
{
info->compress[i] = TRUE;
}
else
{
info->compress[i] = FALSE;
}
}
/* set with default values */
memcpy (info->depths, info->default_depths,
sizeof (gint) * info->num_icons);
}
static gboolean
ico_save_dialog (gint32 image_ID,
IcoSaveInfo *info)
{
GtkWidget *dialog;
gint i;
gint response;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = ico_dialog_new (info);
for (i = 0; i < info->num_icons; i++)
{
/* if (gimp_layer_get_visible(layers[i])) */
ico_dialog_add_icon (dialog, info->layers[i], i);
}
/* Scale the thing to approximately fit its content, but not too large ... */
gtk_window_set_default_size (GTK_WINDOW (dialog),
-1,
200 + (info->num_icons > 4 ?
500 : info->num_icons * 120));
gtk_widget_show (dialog);
response = gimp_dialog_run (GIMP_DIALOG (dialog));
gtk_widget_destroy (dialog);
return (response == GTK_RESPONSE_OK);
}
static void
ico_set_bit_in_data (guint8 *data,
gint line_width,
gint bit_num,
gint bit_val)
{
gint line;
gint width32;
gint offset;
/* width per line in multiples of 32 bits */
width32 = (line_width % 32 == 0 ? line_width/32 : line_width/32 + 1);
line = bit_num / line_width;
offset = bit_num % line_width;
bit_val = bit_val & 0x00000001;
data[line * width32 * 4 + offset/8] |= (bit_val << (7 - (offset % 8)));
}
static void
ico_set_nibble_in_data (guint8 *data,
gint line_width,
gint nibble_num,
gint nibble_val)
{
gint line;
gint width8;
gint offset;
/* width per line in multiples of 32 bits */
width8 = (line_width % 8 == 0 ? line_width/8 : line_width/8 + 1);
line = nibble_num / line_width;
offset = nibble_num % line_width;
nibble_val = nibble_val & 0x0000000F;
data[line * width8 * 4 + offset/2] |=
(nibble_val << (4 * (1 - (offset % 2))));
}
static void
ico_set_byte_in_data (guint8 *data,
gint line_width,
gint byte_num,
gint byte_val)
{
gint line;
gint width4;
gint offset;
gint byte;
/* width per line in multiples of 32 bits */
width4 = (line_width % 4 == 0 ? line_width/4 : line_width/4 + 1);
line = byte_num / line_width;
offset = byte_num % line_width;
byte = byte_val & 0x000000FF;
data[line * width4 * 4 + offset] = byte;
}
/* Create a colormap from the given buffer data */
static guint32 *
ico_create_palette (const guchar *cmap,
gint num_colors,
gint num_colors_used,
gint *black_slot)
{
guchar *palette;
gint i;
g_return_val_if_fail (cmap != NULL || num_colors_used == 0, NULL);
g_return_val_if_fail (num_colors_used <= num_colors, NULL);
palette = g_new0 (guchar, num_colors * 4);
*black_slot = -1;
for (i = 0; i < num_colors_used; i++)
{
palette[i * 4 + 2] = cmap[i * 3];
palette[i * 4 + 1] = cmap[i * 3 + 1];
palette[i * 4] = cmap[i * 3 + 2];
if ((cmap[i*3] == 0) &&
(cmap[i*3 + 1] == 0) &&
(cmap[i*3 + 2] == 0))
{
*black_slot = i;
}
}
if (*black_slot == -1)
{
if (num_colors_used == num_colors)
{
D(("WARNING -- no room for black, this shouldn't happen.\n"));
*black_slot = num_colors - 1;
palette[(num_colors-1) * 4] = 0;
palette[(num_colors-1) * 4 + 1] = 0;
palette[(num_colors-1) * 4 + 2] = 0;
}
else
{
*black_slot = num_colors_used;
}
}
return (guint32 *) palette;
}
static GHashTable *
ico_create_color_to_palette_map (const guint32 *palette,
gint num_colors)
{
GHashTable *hash;
gint i;
hash = g_hash_table_new_full (g_int_hash, g_int_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) g_free);
for (i = 0; i < num_colors; i++)
{
const guint8 *pixel = (const guint8 *) &palette[i];
gint *color;
gint *slot;
color = g_new (gint, 1);
slot = g_new (gint, 1);
*color = (pixel[2] << 16 | pixel[1] << 8 | pixel[0]);
*slot = i;
g_hash_table_insert (hash, color, slot);
}
return hash;
}
static gint
ico_get_palette_index (GHashTable *hash,
gint red,
gint green,
gint blue)
{
gint color = 0;
gint *slot;
color = (red << 16 | green << 8 | blue);
slot = g_hash_table_lookup (hash, &color);
if (!slot)
{
return 0;
}
return *slot;
}
static gint
ico_get_layer_num_colors (gint32 layer,
gboolean *uses_alpha_levels)
{
GimpPixelRgn pixel_rgn;
gint w, h;
gint bpp;
gint num_colors = 0;
guint num_pixels;
guchar *buffer;
guchar *src;
guint32 *colors;
guint32 *c;
GHashTable *hash;
GimpDrawable *drawable = gimp_drawable_get (layer);
w = gimp_drawable_width (layer);
h = gimp_drawable_height (layer);
num_pixels = w * h;
bpp = gimp_drawable_bpp (layer);
buffer = src = g_new (guchar, num_pixels * bpp);
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, w, h, FALSE, FALSE);
gimp_pixel_rgn_get_rect (&pixel_rgn, buffer, 0, 0, w, h);
gimp_drawable_detach (drawable);
hash = g_hash_table_new (g_int_hash, g_int_equal);
*uses_alpha_levels = FALSE;
colors = c = g_new (guint32, num_pixels);
switch (bpp)
{
case 1:
while (num_pixels--)
{
*c = *src;
g_hash_table_insert (hash, c, c);
src++;
c++;
}
break;
case 2:
while (num_pixels--)
{
*c = (src[1] << 8) | src[0];
if (src[1] != 0 && src[1] != 255)
*uses_alpha_levels = TRUE;
g_hash_table_insert (hash, c, c);
src += 2;
c++;
}
break;
case 3:
while (num_pixels--)
{
*c = (src[2] << 16) | (src[1] << 8) | src[0];
g_hash_table_insert (hash, c, c);
src += 3;
c++;
}
break;
case 4:
while (num_pixels--)
{
*c = (src[3] << 24) | (src[2] << 16) | (src[1] << 8) | src[0];
if (src[3] != 0 && src[3] != 255)
*uses_alpha_levels = TRUE;
g_hash_table_insert (hash, c, c);
src += 4;
c++;
}
break;
}
num_colors = g_hash_table_size (hash);
g_hash_table_destroy (hash);
g_free (colors);
g_free (buffer);
return num_colors;
}
gboolean
ico_cmap_contains_black (const guchar *cmap,
gint num_colors)
{
gint i;
for (i = 0; i < num_colors; i++)
{
if ((cmap[3 * i ] == 0) &&
(cmap[3 * i + 1] == 0) &&
(cmap[3 * i + 2] == 0))
{
return TRUE;
}
}
return FALSE;
}
static void
ico_image_get_reduced_buf (guint32 layer,
gint bpp,
gint *num_colors,
guchar **cmap_out,
guchar **buf_out)
{
GimpPixelRgn src_pixel_rgn, dst_pixel_rgn;
gint32 tmp_image;
gint32 tmp_layer;
gint w, h;
guchar *buffer;
guchar *cmap = NULL;
GimpDrawable *drawable = gimp_drawable_get (layer);
w = gimp_drawable_width (layer);
h = gimp_drawable_height (layer);
*num_colors = 0;
buffer = g_new (guchar, w * h * 4);
if (bpp <= 8 || bpp == 24 || drawable->bpp != 4)
{
gint32 image = gimp_drawable_get_image (layer);
GimpDrawable *tmp;
tmp_image = gimp_image_new (gimp_drawable_width (layer),
gimp_drawable_height (layer),
gimp_image_base_type (image));
gimp_image_undo_disable (tmp_image);
if (gimp_drawable_is_indexed (layer))
{
guchar *cmap;
gint num_colors;
cmap = gimp_image_get_colormap (image, &num_colors);
gimp_image_set_colormap (tmp_image, cmap, num_colors);
g_free (cmap);
}
tmp_layer = gimp_layer_new (tmp_image, "tmp", w, h,
gimp_drawable_type (layer),
100, GIMP_NORMAL_MODE);
gimp_image_add_layer (tmp_image, tmp_layer, 0);
tmp = gimp_drawable_get (tmp_layer);
gimp_pixel_rgn_init (&src_pixel_rgn, drawable, 0, 0, w, h, FALSE, FALSE);
gimp_pixel_rgn_init (&dst_pixel_rgn, tmp, 0, 0, w, h, TRUE, FALSE);
gimp_pixel_rgn_get_rect (&src_pixel_rgn, buffer, 0, 0, w, h);
gimp_pixel_rgn_set_rect (&dst_pixel_rgn, buffer, 0, 0, w, h);
gimp_drawable_detach (tmp);
if (! gimp_drawable_is_rgb (tmp_layer))
gimp_image_convert_rgb (tmp_image);
if (bpp <= 8)
{
gimp_image_convert_indexed (tmp_image,
GIMP_FS_DITHER, GIMP_MAKE_PALETTE,
1 << bpp, TRUE, FALSE, "dummy");
cmap = gimp_image_get_colormap (tmp_image, num_colors);
if (*num_colors == (1 << bpp) &&
!ico_cmap_contains_black (cmap, *num_colors))
{
/* Windows icons with color maps need the color black.
* We need to eliminate one more color to make room for black.
*/
if (gimp_drawable_is_indexed (layer))
{
g_free (cmap);
cmap = gimp_image_get_colormap (image, num_colors);
gimp_image_set_colormap (tmp_image, cmap, *num_colors);
}
else if (gimp_drawable_is_gray (layer))
{
gimp_image_convert_grayscale (tmp_image);
}
else
{
gimp_image_convert_rgb (tmp_image);
}
tmp = gimp_drawable_get (tmp_layer);
gimp_pixel_rgn_init (&dst_pixel_rgn,
tmp, 0, 0, w, h, TRUE, FALSE);
gimp_pixel_rgn_set_rect (&dst_pixel_rgn, buffer, 0, 0, w, h);
gimp_drawable_detach (tmp);
if (!gimp_drawable_is_rgb (layer))
gimp_image_convert_rgb (tmp_image);
gimp_image_convert_indexed (tmp_image,
GIMP_FS_DITHER, GIMP_MAKE_PALETTE,
(1<<bpp) - 1, TRUE, FALSE, "dummy");
g_free (cmap);
cmap = gimp_image_get_colormap (tmp_image, num_colors);
}
gimp_image_convert_rgb (tmp_image);
}
else if (bpp == 24)
{
GimpParam *return_vals;
gint n_return_vals;
return_vals =
gimp_run_procedure ("plug-in-threshold-alpha", &n_return_vals,
GIMP_PDB_INT32, GIMP_RUN_NONINTERACTIVE,
GIMP_PDB_IMAGE, tmp_image,
GIMP_PDB_DRAWABLE, tmp_layer,
GIMP_PDB_INT32, ICO_ALPHA_THRESHOLD,
GIMP_PDB_END);
gimp_destroy_params (return_vals, n_return_vals);
}
gimp_layer_add_alpha (tmp_layer);
tmp = gimp_drawable_get (tmp_layer);
gimp_pixel_rgn_init (&src_pixel_rgn, tmp, 0, 0, w, h, FALSE, FALSE);
gimp_pixel_rgn_get_rect (&src_pixel_rgn, buffer, 0, 0, w, h);
gimp_drawable_detach (tmp);
gimp_image_delete (tmp_image);
}
else
{
gimp_pixel_rgn_init (&src_pixel_rgn, drawable, 0, 0, w, h, FALSE, FALSE);
gimp_pixel_rgn_get_rect (&src_pixel_rgn, buffer, 0, 0, w, h);
}
gimp_drawable_detach (drawable);
*cmap_out = cmap;
*buf_out = buffer;
}
static gboolean
ico_write_png (FILE *fp,
gint32 layer,
gint32 depth)
{
png_structp png_ptr;
png_infop info_ptr;
png_byte **row_pointers;
gint i, rowstride;
gint width, height;
gint num_colors_used;
guchar *palette;
guchar *buffer;
row_pointers = NULL;
palette = NULL;
buffer = NULL;
width = gimp_drawable_width (layer);
height = gimp_drawable_height (layer);
png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if ( !png_ptr )
return FALSE;
info_ptr = png_create_info_struct (png_ptr);
if ( !info_ptr )
{
png_destroy_write_struct (&png_ptr, NULL);
return FALSE;
}
if (setjmp (png_jmpbuf (png_ptr)))
{
png_destroy_write_struct (&png_ptr, &info_ptr);
if ( row_pointers )
g_free (row_pointers);
if (palette)
g_free (palette);
if (buffer)
g_free (buffer);
return FALSE;
}
ico_image_get_reduced_buf (layer, depth, &num_colors_used,
&palette, &buffer);
png_init_io (png_ptr, fp);
png_set_IHDR (png_ptr, info_ptr, width, height,
8,
PNG_COLOR_TYPE_RGBA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_write_info (png_ptr, info_ptr);
rowstride = ico_rowstride (width, 32);
row_pointers = g_new (png_byte*, height);
for (i = 0; i < height; i++)
{
row_pointers[i] = buffer + rowstride * i;
}
png_write_image (png_ptr, row_pointers);
row_pointers = NULL;
png_write_end (png_ptr, info_ptr);
png_destroy_write_struct (&png_ptr, &info_ptr);
g_free (row_pointers);
g_free (palette);
g_free (buffer);
return TRUE;
}
static gboolean
ico_write_icon (FILE *fp,
gint32 layer,
gint32 depth)
{
IcoFileDataHeader header;
gint and_len, xor_len, palette_index, x, y;
gint num_colors = 0, num_colors_used = 0, black_index = 0;
gint width, height;
guchar *buffer = NULL, *pixel;
guint32 *buffer32;
guchar *palette;
GHashTable *color_to_slot = NULL;
guchar *xor_map, *and_map;
guint32 *palette32 = NULL;
gint palette_len = 0;
D(("Creating data structures for icon %i ------------------------\n",
num_icon));
width = gimp_drawable_width (layer);
height = gimp_drawable_height (layer);
header.header_size = 40;
header.width = width;
header.height = 2 * height;
header.planes = 1;
header.bpp = depth;
header.compression = 0;
header.image_size = 0;
header.x_res = 0;
header.y_res = 0;
header.used_clrs = 0;
header.important_clrs = 0;
num_colors = (1L << header.bpp);
D((" header size %i, w %i, h %i, planes %i, bpp %i\n",
header.header_size, header.width, header.height, header.planes,
header.bpp));
/* Reduce colors in copy of image */
ico_image_get_reduced_buf (layer, header.bpp, &num_colors_used,
&palette, &buffer);
buffer32 = (guint32 *) buffer;
/* Set up colormap and and_map when necessary: */
if (header.bpp <= 8)
{
/* Create a colormap */
palette32 = ico_create_palette (palette,
num_colors, num_colors_used,
&black_index);
palette_len = num_colors * 4;
color_to_slot = ico_create_color_to_palette_map (palette32,
num_colors_used);
D((" created %i-slot colormap with %i colors, black at slot %i\n",
num_colors, num_colors_used, black_index));
}
/* Create and_map. It's padded out to 32 bits per line: */
and_map = ico_alloc_map (width, height, 1, &and_len);
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
pixel = (guint8 *) &buffer32[y * width + x];
ico_set_bit_in_data (and_map, width,
(height - y -1) * width + x,
(pixel[3] > ICO_ALPHA_THRESHOLD ? 0 : 1));
}
xor_map = ico_alloc_map (width, height, header.bpp, &xor_len);
/* Now fill in the xor map */
switch (header.bpp)
{
case 1:
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
pixel = (guint8 *) &buffer32[y * width + x];
palette_index = ico_get_palette_index (color_to_slot, pixel[0],
pixel[1], pixel[2]);
if (ico_get_bit_from_data (and_map, width,
(height - y - 1) * width + x))
{
ico_set_bit_in_data (xor_map, width,
(height - y -1) * width + x,
black_index);
}
else
{
ico_set_bit_in_data (xor_map, width,
(height - y -1) * width + x,
palette_index);
}
}
break;
case 4:
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
pixel = (guint8 *) &buffer32[y * width + x];
palette_index = ico_get_palette_index(color_to_slot, pixel[0],
pixel[1], pixel[2]);
if (ico_get_bit_from_data (and_map, width,
(height - y - 1) * width + x))
{
ico_set_nibble_in_data (xor_map, width,
(height - y -1) * width + x,
black_index);
}
else
{
ico_set_nibble_in_data (xor_map, width,
(height - y - 1) * width + x,
palette_index);
}
}
break;
case 8:
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
pixel = (guint8 *) &buffer32[y * width + x];
palette_index = ico_get_palette_index (color_to_slot,
pixel[0],
pixel[1],
pixel[2]);
if (ico_get_bit_from_data (and_map, width,
(height - y - 1) * width + x))
{
ico_set_byte_in_data (xor_map, width,
(height - y - 1) * width + x,
black_index);
}
else
{
ico_set_byte_in_data (xor_map, width,
(height - y - 1) * width + x,
palette_index);
}
}
break;
case 24:
for (y = 0; y < height; y++)
{
guchar *row = xor_map + (xor_len * (height - y - 1) / height);
for (x = 0; x < width; x++)
{
pixel = (guint8 *) &buffer32[y * width + x];
row[0] = pixel[2];
row[1] = pixel[1];
row[2] = pixel[0];
row += 3;
}
}
break;
default:
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
pixel = (guint8 *) &buffer32[y * width + x];
((guint32 *) xor_map)[(height - y -1) * width + x] =
GUINT32_TO_LE ((pixel[0] << 16) |
(pixel[1] << 8) |
(pixel[2]) |
(pixel[3] << 24));
}
}
D((" filled and_map of length %i, xor_map of length %i\n",
and_len, xor_len));
if (color_to_slot)
g_hash_table_destroy (color_to_slot);
g_free (palette);
g_free (buffer);
ico_write_int32 (fp, (guint32*) &header, 3);
ico_write_int16 (fp, &header.planes, 2);
ico_write_int32 (fp, &header.compression, 6);
if (palette_len)
ico_write_int8 (fp, (guint8 *) palette32, palette_len);
ico_write_int8 (fp, xor_map, xor_len);
ico_write_int8 (fp, and_map, and_len);
g_free (palette32);
g_free (xor_map);
g_free (and_map);
return TRUE;
}
static void
ico_save_info_free (IcoSaveInfo *info)
{
g_free (info->depths);
g_free (info->default_depths);
g_free (info->compress);
g_free (info->layers);
memset (info, 0, sizeof (IcoSaveInfo));
}
GimpPDBStatusType
ico_save_image (const gchar *filename,
gint32 image,
gint32 run_mode,
GError **error)
{
FILE *fp;
gint i;
gint width, height;
IcoSaveInfo info;
IcoFileHeader header;
IcoFileEntry *entries;
gboolean saved;
D(("*** Saving Microsoft icon file %s\n", filename));
ico_save_init (image, &info);
if (run_mode == GIMP_RUN_INTERACTIVE)
{
/* Allow user to override default values */
if ( !ico_save_dialog (image, &info))
return GIMP_PDB_CANCEL;
}
gimp_progress_init_printf (_("Saving '%s'"),
gimp_filename_to_utf8 (filename));
if (! (fp = g_fopen (filename, "wb")))
{
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 GIMP_PDB_EXECUTION_ERROR;
}
header.reserved = 0;
header.resource_type = 1;
header.icon_count = info.num_icons;
if ( !ico_write_int16 (fp, &header.reserved, 1)
|| !ico_write_int16 (fp, &header.resource_type, 1)
|| !ico_write_int16 (fp, &header.icon_count, 1) )
{
ico_save_info_free (&info);
fclose (fp);
return GIMP_PDB_EXECUTION_ERROR;
}
entries = g_new0 (IcoFileEntry, info.num_icons);
if (fwrite (entries, sizeof (IcoFileEntry), info.num_icons, fp) <= 0)
{
ico_save_info_free (&info);
fclose (fp);
return GIMP_PDB_EXECUTION_ERROR;
}
for (i = 0; i < info.num_icons; i++)
{
gimp_progress_update ((gdouble)i / (gdouble)info.num_icons);
width = gimp_drawable_width (info.layers[i]);
height = gimp_drawable_height (info.layers[i]);
if (width <= 255 && height <= 255)
{
entries[i].width = width;
entries[i].height = height;
}
else
{
entries[i].width = 0;
entries[i].height = 0;
}
if ( info.depths[i] <= 8 )
entries[i].num_colors = 1 << info.depths[i];
else
entries[i].num_colors = 0;
entries[i].reserved = 0;
entries[i].planes = 1;
entries[i].bpp = info.depths[i];
entries[i].offset = ftell (fp);
if (info.compress[i])
saved = ico_write_png (fp, info.layers[i], info.depths[i]);
else
saved = ico_write_icon (fp, info.layers[i], info.depths[i]);
if (!saved)
{
ico_save_info_free (&info);
fclose (fp);
return GIMP_PDB_EXECUTION_ERROR;
}
entries[i].size = ftell (fp) - entries[i].offset;
}
for (i = 0; i < info.num_icons; i++)
{
entries[i].planes = GUINT16_TO_LE (entries[i].planes);
entries[i].bpp = GUINT16_TO_LE (entries[i].bpp);
entries[i].size = GUINT32_TO_LE (entries[i].size);
entries[i].offset = GUINT32_TO_LE (entries[i].offset);
}
if (fseek (fp, sizeof(IcoFileHeader), SEEK_SET) < 0
|| fwrite (entries, sizeof (IcoFileEntry), info.num_icons, fp) <= 0)
{
ico_save_info_free (&info);
fclose (fp);
return GIMP_PDB_EXECUTION_ERROR;
}
gimp_progress_update (1.0);
ico_save_info_free (&info);
fclose (fp);
return GIMP_PDB_SUCCESS;
}
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