/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
/* GdkPixbuf library - TIFF image loader
*
* Copyright (C) 1999 Mark Crichton
* Copyright (C) 1999 The Free Software Foundation
*
* Authors: Mark Crichton <crichton@gimp.org>
* Federico Mena-Quintero <federico@gimp.org>
* Jonathan Blandford <jrb@redhat.com>
* S�ren Sandmann <sandmann@daimi.au.dk>
* Christian Dywan <christian@lanedo.com>
* Mukund Sivaraman <muks@banu.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/* Following code (almost) blatantly ripped from Imlib */
#include "config.h"
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <tiffio.h>
#include <errno.h>
#include "gdk-pixbuf-private.h"
#include "fallback-c89.c"
#ifdef G_OS_WIN32
#include <fcntl.h>
#include <io.h>
#define lseek(a,b,c) _lseek(a,b,c)
#define O_RDWR _O_RDWR
#endif
typedef struct _TiffContext TiffContext;
struct _TiffContext
{
GdkPixbufModuleSizeFunc size_func;
GdkPixbufModulePreparedFunc prepare_func;
GdkPixbufModuleUpdatedFunc update_func;
gpointer user_data;
guchar *buffer;
guint allocated;
guint used;
guint pos;
};
static void
tiff_warning_handler (const char *mod, const char *fmt, va_list ap)
{
/* Don't print anything; we should not be dumping junk to
* stderr, since that may be bad for some apps.
*/
}
static void
tiff_set_handlers (void)
{
TIFFSetErrorHandler (tiff_warning_handler);
TIFFSetWarningHandler (tiff_warning_handler);
}
static void free_buffer (guchar *pixels, gpointer data)
{
g_free (pixels);
}
static GdkPixbuf *
tiff_image_parse (TIFF *tiff, TiffContext *context, GError **error)
{
guchar *pixels = NULL;
gint width, height, rowstride, bytes;
GdkPixbuf *pixbuf;
guint16 bits_per_sample = 0;
uint16 orientation = 0;
uint16 transform = 0;
uint16 codec;
gchar *icc_profile_base64;
const gchar *icc_profile;
guint icc_profile_size;
uint16 resolution_unit;
gchar *density_str;
gint retval;
/* We're called with the lock held. */
if (!TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width)) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Could not get image width (bad TIFF file)"));
return NULL;
}
if (!TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height)) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Could not get image height (bad TIFF file)"));
return NULL;
}
if (width <= 0 || height <= 0) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
_("Width or height of TIFF image is zero"));
return NULL;
}
if (width > G_MAXINT / 4) { /* overflow */
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
_("Dimensions of TIFF image too large"));
return NULL;
}
rowstride = width * 4;
if (height > G_MAXINT / rowstride) { /* overflow */
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
_("Dimensions of TIFF image too large"));
return NULL;
}
bytes = height * rowstride;
if (context && context->size_func) {
gint w = width;
gint h = height;
(* context->size_func) (&w, &h, context->user_data);
/* This is a signal that this function is being called
to support gdk_pixbuf_get_file_info, so we can stop
parsing the tiff file at this point. It is not an
error condition. */
if (w == 0 || h == 0)
return NULL;
}
pixels = g_try_malloc (bytes);
if (!pixels) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Insufficient memory to open TIFF file"));
return NULL;
}
pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
width, height, rowstride,
free_buffer, NULL);
if (!pixbuf) {
g_free (pixels);
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Insufficient memory to open TIFF file"));
return NULL;
}
/* Save the bits per sample as an option since pixbufs are
expected to be always 8 bits per sample. */
TIFFGetField (tiff, TIFFTAG_BITSPERSAMPLE, &bits_per_sample);
if (bits_per_sample > 0) {
gchar str[5];
g_snprintf (str, sizeof (str), "%d", bits_per_sample);
gdk_pixbuf_set_option (pixbuf, "bits-per-sample", str);
}
/* Set the "orientation" key associated with this image. libtiff
orientation handling is odd, so further processing is required
by higher-level functions based on this tag. If the embedded
orientation tag is 1-4, libtiff flips/mirrors the image as
required, and no client processing is required - so we report
no orientation. Orientations 5-8 require rotations which would
swap the width and height of the image. libtiff does not do this.
Instead it interprets orientations 5-8 the same as 1-4.
See http://bugzilla.remotesensing.org/show_bug.cgi?id=1548.
To correct for this, the client must apply the transform normally
used for orientation 5 to both orientations 5 and 7, and apply
the transform normally used for orientation 7 for both
orientations 6 and 8. Then everythings works out OK! */
TIFFGetField (tiff, TIFFTAG_ORIENTATION, &orientation);
switch (orientation) {
case 5:
case 7:
transform = 5;
break;
case 6:
case 8:
transform = 7;
break;
default:
transform = 0;
break;
}
if (transform > 0 ) {
gchar str[5];
g_snprintf (str, sizeof (str), "%d", transform);
gdk_pixbuf_set_option (pixbuf, "orientation", str);
}
TIFFGetField (tiff, TIFFTAG_COMPRESSION, &codec);
if (codec > 0) {
gchar str[5];
g_snprintf (str, sizeof (str), "%d", codec);
gdk_pixbuf_set_option (pixbuf, "compression", str);
}
/* Extract embedded ICC profile */
retval = TIFFGetField (tiff, TIFFTAG_ICCPROFILE, &icc_profile_size, &icc_profile);
if (retval == 1) {
icc_profile_base64 = g_base64_encode ((const guchar *) icc_profile, icc_profile_size);
gdk_pixbuf_set_option (pixbuf, "icc-profile", icc_profile_base64);
g_free (icc_profile_base64);
}
retval = TIFFGetField (tiff, TIFFTAG_RESOLUTIONUNIT, &resolution_unit);
if (retval == 1) {
float x_resolution = 0, y_resolution = 0;
TIFFGetField (tiff, TIFFTAG_XRESOLUTION, &x_resolution);
TIFFGetField (tiff, TIFFTAG_YRESOLUTION, &y_resolution);
switch (resolution_unit) {
case RESUNIT_INCH:
density_str = g_strdup_printf ("%d", (int) round (x_resolution));
gdk_pixbuf_set_option (pixbuf, "x-dpi", density_str);
g_free (density_str);
density_str = g_strdup_printf ("%d", (int) round (y_resolution));
gdk_pixbuf_set_option (pixbuf, "y-dpi", density_str);
g_free (density_str);
break;
case RESUNIT_CENTIMETER:
density_str = g_strdup_printf ("%d", DPCM_TO_DPI (x_resolution));
gdk_pixbuf_set_option (pixbuf, "x-dpi", density_str);
g_free (density_str);
density_str = g_strdup_printf ("%d", DPCM_TO_DPI (y_resolution));
gdk_pixbuf_set_option (pixbuf, "y-dpi", density_str);
g_free (density_str);
break;
}
}
if (context && context->prepare_func)
(* context->prepare_func) (pixbuf, NULL, context->user_data);
if (!TIFFReadRGBAImageOriented (tiff, width, height, (uint32 *)pixels, ORIENTATION_TOPLEFT, 1)) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Failed to load RGB data from TIFF file"));
g_object_unref (pixbuf);
return NULL;
}
/* Flag multi-page documents, because this loader only handles the
first page. The client app may wish to warn the user. */
if (TIFFReadDirectory (tiff))
gdk_pixbuf_set_option (pixbuf, "multipage", "yes");
#if G_BYTE_ORDER == G_BIG_ENDIAN
/* Turns out that the packing used by TIFFRGBAImage depends on
* the host byte order...
*/
while (pixels < pixbuf->pixels + bytes) {
uint32 pixel = *(uint32 *)pixels;
int r = TIFFGetR(pixel);
int g = TIFFGetG(pixel);
int b = TIFFGetB(pixel);
int a = TIFFGetA(pixel);
*pixels++ = r;
*pixels++ = g;
*pixels++ = b;
*pixels++ = a;
}
#endif
if (context && context->update_func)
(* context->update_func) (pixbuf, 0, 0, width, height, context->user_data);
return pixbuf;
}
/* Static loader */
static GdkPixbuf *
gdk_pixbuf__tiff_image_load (FILE *f, GError **error)
{
TIFF *tiff;
int fd;
GdkPixbuf *pixbuf;
g_return_val_if_fail (f != NULL, NULL);
tiff_set_handlers ();
fd = fileno (f);
/* On OSF, apparently fseek() works in some on-demand way, so
* the fseek gdk_pixbuf_new_from_file() doesn't work here
* since we are using the raw file descriptor. So, we call lseek() on the fd
* before using it. (#60840)
*/
lseek (fd, 0, SEEK_SET);
tiff = TIFFFdOpen (fd, "libpixbuf-tiff", "r");
if (!tiff) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
_("Failed to open TIFF image"));
return NULL;
}
pixbuf = tiff_image_parse (tiff, NULL, error);
TIFFClose (tiff);
return pixbuf;
}
/* Progressive loader */
static gpointer
gdk_pixbuf__tiff_image_begin_load (GdkPixbufModuleSizeFunc size_func,
GdkPixbufModulePreparedFunc prepare_func,
GdkPixbufModuleUpdatedFunc update_func,
gpointer user_data,
GError **error)
{
TiffContext *context;
context = g_new0 (TiffContext, 1);
context->size_func = size_func;
context->prepare_func = prepare_func;
context->update_func = update_func;
context->user_data = user_data;
context->buffer = NULL;
context->allocated = 0;
context->used = 0;
context->pos = 0;
return context;
}
static tsize_t
tiff_load_read (thandle_t handle, tdata_t buf, tsize_t size)
{
TiffContext *context = (TiffContext *)handle;
if (context->pos + size > context->used)
return 0;
memcpy (buf, context->buffer + context->pos, size);
context->pos += size;
return size;
}
static tsize_t
tiff_load_write (thandle_t handle, tdata_t buf, tsize_t size)
{
return -1;
}
static toff_t
tiff_load_seek (thandle_t handle, toff_t offset, int whence)
{
TiffContext *context = (TiffContext *)handle;
switch (whence) {
case SEEK_SET:
if (offset > context->used)
return -1;
context->pos = offset;
break;
case SEEK_CUR:
if (offset + context->pos >= context->used)
return -1;
context->pos += offset;
break;
case SEEK_END:
if (offset + context->used > context->used)
return -1;
context->pos = context->used + offset;
break;
default:
return -1;
}
return context->pos;
}
static int
tiff_load_close (thandle_t context)
{
return 0;
}
static toff_t
tiff_load_size (thandle_t handle)
{
TiffContext *context = (TiffContext *)handle;
return context->used;
}
static int
tiff_load_map_file (thandle_t handle, tdata_t *buf, toff_t *size)
{
TiffContext *context = (TiffContext *)handle;
*buf = context->buffer;
*size = context->used;
return 0;
}
static void
tiff_load_unmap_file (thandle_t handle, tdata_t data, toff_t offset)
{
}
static gboolean
gdk_pixbuf__tiff_image_stop_load (gpointer data,
GError **error)
{
TiffContext *context = data;
TIFF *tiff;
gboolean retval = FALSE;
g_return_val_if_fail (data != NULL, FALSE);
tiff_set_handlers ();
tiff = TIFFClientOpen ("libtiff-pixbuf", "r", data,
tiff_load_read, tiff_load_write,
tiff_load_seek, tiff_load_close,
tiff_load_size,
tiff_load_map_file, tiff_load_unmap_file);
if (!tiff) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Failed to load TIFF image"));
} else {
GdkPixbuf *pixbuf;
pixbuf = tiff_image_parse (tiff, context, error);
retval = (pixbuf != NULL);
g_clear_object (&pixbuf);
/* tiff_image_parse() can return NULL on success in a particular case */
if (!retval && error && !*error) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Failed to load TIFF image"));
}
}
if (tiff)
TIFFClose (tiff);
g_free (context->buffer);
g_free (context);
return retval;
}
static gboolean
make_available_at_least (TiffContext *context, guint needed)
{
guchar *new_buffer = NULL;
guint need_alloc;
need_alloc = context->used + needed;
if (need_alloc > context->allocated) {
guint new_size = 1;
while (new_size < need_alloc)
new_size *= 2;
new_buffer = g_try_realloc (context->buffer, new_size);
if (new_buffer) {
context->buffer = new_buffer;
context->allocated = new_size;
return TRUE;
}
return FALSE;
}
return TRUE;
}
static gboolean
gdk_pixbuf__tiff_image_load_increment (gpointer data, const guchar *buf,
guint size, GError **error)
{
TiffContext *context = (TiffContext *) data;
g_return_val_if_fail (data != NULL, FALSE);
tiff_set_handlers ();
if (!make_available_at_least (context, size)) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Insufficient memory to open TIFF file"));
return FALSE;
}
memcpy (context->buffer + context->used, buf, size);
context->used += size;
return TRUE;
}
typedef struct {
gchar *buffer;
guint allocated;
guint used;
guint pos;
} TiffSaveContext;
static tsize_t
tiff_save_read (thandle_t handle, tdata_t buf, tsize_t size)
{
return -1;
}
static tsize_t
tiff_save_write (thandle_t handle, tdata_t buf, tsize_t size)
{
TiffSaveContext *context = (TiffSaveContext *)handle;
/* Modify buffer length */
if (context->pos + size > context->used)
context->used = context->pos + size;
/* Realloc */
if (context->used > context->allocated) {
context->buffer = g_realloc (context->buffer, context->pos + size);
context->allocated = context->used;
}
/* Now copy the data */
memcpy (context->buffer + context->pos, buf, size);
/* Update pos */
context->pos += size;
return size;
}
static toff_t
tiff_save_seek (thandle_t handle, toff_t offset, int whence)
{
TiffSaveContext *context = (TiffSaveContext *)handle;
switch (whence) {
case SEEK_SET:
context->pos = offset;
break;
case SEEK_CUR:
context->pos += offset;
break;
case SEEK_END:
context->pos = context->used + offset;
break;
default:
return -1;
}
return context->pos;
}
static int
tiff_save_close (thandle_t context)
{
return 0;
}
static toff_t
tiff_save_size (thandle_t handle)
{
return -1;
}
static TiffSaveContext *
create_save_context (void)
{
TiffSaveContext *context;
context = g_new (TiffSaveContext, 1);
context->buffer = NULL;
context->allocated = 0;
context->used = 0;
context->pos = 0;
return context;
}
static void
free_save_context (TiffSaveContext *context)
{
g_free (context->buffer);
g_free (context);
}
static void
copy_gray_row (gint *dest,
guchar *src,
gint width,
gboolean has_alpha)
{
gint i;
guchar *p;
p = src;
for (i = 0; i < width; i++) {
int pr, pg, pb, pv;
pr = *p++;
pg = *p++;
pb = *p++;
if (has_alpha) {
int pa = *p++;
/* Premul alpha to simulate it */
if (pa > 0) {
pr = pr * pa / 255;
pg = pg * pa / 255;
pb = pb * pa / 255;
} else {
pr = pg = pb = 0;
}
}
/* Calculate value MAX(MAX(r,g),b) */
pv = pr > pg ? pr : pg;
pv = pv > pb ? pv : pb;
*dest++ = pv;
}
}
static gboolean
gdk_pixbuf__tiff_image_save_to_callback (GdkPixbufSaveFunc save_func,
gpointer user_data,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
TIFF *tiff;
gint width, height, rowstride;
const gchar *bits_per_sample = NULL;
long bps;
const gchar *compression = NULL;
guchar *pixels;
gboolean has_alpha;
gushort alpha_samples[1] = { EXTRASAMPLE_UNASSALPHA };
int y;
TiffSaveContext *context;
gboolean retval;
const gchar *icc_profile = NULL;
const gchar *x_dpi = NULL;
const gchar *y_dpi = NULL;
guint16 codec;
tiff_set_handlers ();
context = create_save_context ();
tiff = TIFFClientOpen ("libtiff-pixbuf", "w", context,
tiff_save_read, tiff_save_write,
tiff_save_seek, tiff_save_close,
tiff_save_size,
NULL, NULL);
if (!tiff) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Failed to save TIFF image"));
free_save_context (context);
return FALSE;
}
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
width = gdk_pixbuf_get_width (pixbuf);
/* Guaranteed by the caller. */
g_assert (width >= 0);
g_assert (height >= 0);
g_assert (rowstride >= 0);
TIFFSetField (tiff, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField (tiff, TIFFTAG_IMAGELENGTH, height);
/* libtiff supports a number of 'codecs' such as:
1 None, 2 Huffman, 5 LZW, 7 JPEG, 8 Deflate, see tiff.h */
if (keys && *keys && values && *values) {
guint i = 0;
while (keys[i]) {
if (g_str_equal (keys[i], "bits-per-sample"))
bits_per_sample = values[i];
else if (g_str_equal (keys[i], "compression"))
compression = values[i];
else if (g_str_equal (keys[i], "icc-profile"))
icc_profile = values[i];
else if (g_str_equal (keys[i], "x-dpi"))
x_dpi = values[i];
else if (g_str_equal (keys[i], "y-dpi"))
y_dpi = values[i];
i++;
}
}
/* Use 8 bits per sample by default, if none was recorded or
specified. */
if (!bits_per_sample)
bits_per_sample = "8";
/* Use DEFLATE compression (8) by default, if none was recorded
or specified. */
if (!compression)
compression = "8";
/* libtiff supports a number of 'codecs' such as:
1 None, 2 Huffman, 5 LZW, 7 JPEG, 8 Deflate, see tiff.h */
codec = strtol (compression, NULL, 0);
if (TIFFIsCODECConfigured (codec))
TIFFSetField (tiff, TIFFTAG_COMPRESSION, codec);
else {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("TIFF compression doesn't refer to a valid codec."));
retval = FALSE;
goto cleanup;
}
/* We support 1-bit or 8-bit saving */
bps = atol (bits_per_sample);
if (bps == 1) {
TIFFSetField (tiff, TIFFTAG_BITSPERSAMPLE, 1);
TIFFSetField (tiff, TIFFTAG_SAMPLESPERPIXEL, 1);
TIFFSetField (tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
TIFFSetField (tiff, TIFFTAG_COMPRESSION, COMPRESSION_CCITTFAX4);
} else if (bps == 8) {
TIFFSetField (tiff, TIFFTAG_BITSPERSAMPLE, 8);
TIFFSetField (tiff, TIFFTAG_SAMPLESPERPIXEL, has_alpha ? 4 : 3);
TIFFSetField (tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
if (has_alpha)
TIFFSetField (tiff, TIFFTAG_EXTRASAMPLES, 1, alpha_samples);
if (icc_profile != NULL) {
guchar *icc_profile_buf;
gsize icc_profile_size;
/* decode from base64 */
icc_profile_buf = g_base64_decode (icc_profile, &icc_profile_size);
if (icc_profile_size < 127) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("Color profile has invalid length %d."),
(gint) icc_profile_size);
retval = FALSE;
g_free (icc_profile_buf);
goto cleanup;
}
TIFFSetField (tiff, TIFFTAG_ICCPROFILE, icc_profile_size, icc_profile_buf);
g_free (icc_profile_buf);
}
} else {
/* The passed bits-per-sample is not supported. */
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("TIFF bits-per-sample doesn't contain a supported value."));
retval = FALSE;
goto cleanup;
}
TIFFSetField (tiff, TIFFTAG_ROWSPERSTRIP, height);
TIFFSetField (tiff, TIFFTAG_FILLORDER, FILLORDER_MSB2LSB);
TIFFSetField (tiff, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
if (bps == 1) {
guchar *mono_row;
gint *dith_row_1, *dith_row_2, *dith_row_tmp;
dith_row_1 = g_new (gint, width);
dith_row_2 = g_new (gint, width);
mono_row = g_malloc ((width + 7) / 8);
copy_gray_row (dith_row_1, pixels, width, has_alpha);
for (y = 0; y < height; y++) {
guint x;
gint *p;
memset (mono_row, 0, (width + 7) / 8);
if (y > 0) {
dith_row_tmp = dith_row_1;
dith_row_1 = dith_row_2;
dith_row_2 = dith_row_tmp;
}
if (y < (height - 1))
copy_gray_row (dith_row_2, pixels + ((y + 1) * rowstride), width, has_alpha);
p = dith_row_1;
for (x = 0; x < width; x++) {
gint p_old, p_new, quant_error;
/* Apply Floyd-Steinberg dithering */
p_old = *p++;
if (p_old > 127)
p_new = 255;
else
p_new = 0;
quant_error = p_old - p_new;
if (x < (width - 1))
dith_row_1[x + 1] += 7 * quant_error / 16;
if (y < (height - 1)) {
if (x > 0)
dith_row_2[x - 1] += 3 * quant_error / 16;
dith_row_2[x] += 5 * quant_error / 16;
if (x < (width - 1))
dith_row_2[x + 1] += quant_error / 16;
}
if (p_new > 127)
mono_row[x / 8] |= (0x1 << (7 - (x % 8)));
}
if (TIFFWriteScanline (tiff, mono_row, y, 0) == -1)
break;
}
g_free (mono_row);
g_free (dith_row_1);
g_free (dith_row_2);
} else {
for (y = 0; y < height; y++) {
if (TIFFWriteScanline (tiff, pixels + y * rowstride, y, 0) == -1)
break;
}
}
if (y < height) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Failed to write TIFF data"));
TIFFClose (tiff);
retval = FALSE;
goto cleanup;
}
if (x_dpi != NULL && y_dpi != NULL) {
char *endptr = NULL;
uint16 resolution_unit = RESUNIT_INCH;
float x_dpi_value, y_dpi_value;
x_dpi_value = strtol (x_dpi, &endptr, 10);
if (x_dpi[0] != '\0' && *endptr != '\0')
x_dpi_value = -1;
if (x_dpi_value <= 0) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("TIFF x-dpi must be greater than zero; value '%s' is not allowed."),
x_dpi);
retval = FALSE;
goto cleanup;
}
y_dpi_value = strtol (y_dpi, &endptr, 10);
if (y_dpi[0] != '\0' && *endptr != '\0')
y_dpi_value = -1;
if (y_dpi_value <= 0) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("TIFF y-dpi must be greater than zero; value '%s' is not allowed."),
y_dpi);
retval = FALSE;
goto cleanup;
}
TIFFSetField (tiff, TIFFTAG_RESOLUTIONUNIT, resolution_unit);
TIFFSetField (tiff, TIFFTAG_XRESOLUTION, x_dpi_value);
TIFFSetField (tiff, TIFFTAG_YRESOLUTION, y_dpi_value);
}
TIFFClose (tiff);
/* Now call the callback */
retval = save_func (context->buffer, context->used, error, user_data);
cleanup:
free_save_context (context);
return retval;
}
static gboolean
save_to_file_cb (const gchar *buf,
gsize count,
GError **error,
gpointer data)
{
gint bytes;
while (count > 0) {
bytes = fwrite (buf, sizeof (gchar), count, (FILE *) data);
if (bytes <= 0)
break;
count -= bytes;
buf += bytes;
}
if (count) {
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_FAILED,
_("Couldn't write to TIFF file"));
return FALSE;
}
return TRUE;
}
static gboolean
gdk_pixbuf__tiff_image_save (FILE *f,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
return gdk_pixbuf__tiff_image_save_to_callback (save_to_file_cb,
f, pixbuf, keys,
values, error);
}
static gboolean
gdk_pixbuf__tiff_is_save_option_supported (const gchar *option_key)
{
if (g_strcmp0 (option_key, "bits-per-sample") == 0 ||
g_strcmp0 (option_key, "compression") == 0 ||
g_strcmp0 (option_key, "icc-profile") == 0 ||
g_strcmp0 (option_key, "x-dpi") == 0 ||
g_strcmp0 (option_key, "y-dpi") == 0)
return TRUE;
return FALSE;
}
#ifndef INCLUDE_tiff
#define MODULE_ENTRY(function) G_MODULE_EXPORT void function
#else
#define MODULE_ENTRY(function) void _gdk_pixbuf__tiff_ ## function
#endif
MODULE_ENTRY (fill_vtable) (GdkPixbufModule *module)
{
module->load = gdk_pixbuf__tiff_image_load;
module->begin_load = gdk_pixbuf__tiff_image_begin_load;
module->stop_load = gdk_pixbuf__tiff_image_stop_load;
module->load_increment = gdk_pixbuf__tiff_image_load_increment;
module->save = gdk_pixbuf__tiff_image_save;
module->save_to_callback = gdk_pixbuf__tiff_image_save_to_callback;
module->is_save_option_supported = gdk_pixbuf__tiff_is_save_option_supported;
}
MODULE_ENTRY (fill_info) (GdkPixbufFormat *info)
{
static const GdkPixbufModulePattern signature[] = {
{ "MM \x2a", " z ", 100 },
{ "II\x2a ", " z", 100 },
{ "II* \020 CR\002 ", " z zzz z", 0 },
{ NULL, NULL, 0 }
};
static const gchar *mime_types[] = {
"image/tiff",
NULL
};
static const gchar *extensions[] = {
"tiff",
"tif",
NULL
};
info->name = "tiff";
info->signature = (GdkPixbufModulePattern *) signature;
info->description = NC_("image format", "TIFF");
info->mime_types = (gchar **) mime_types;
info->extensions = (gchar **) extensions;
info->flags = GDK_PIXBUF_FORMAT_WRITABLE | GDK_PIXBUF_FORMAT_THREADSAFE;
info->license = "LGPL";
}