-/* GdkPixbuf library - JPEG image loader
+/* -*- 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>
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * 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
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
/* Following code (almost) blatantly ripped from Imlib */
-#include <config.h>
+#include "config.h"
#include <stdlib.h>
#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
#include <tiffio.h>
-#include "gdk-pixbuf.h"
+#include <errno.h>
+#include "gdk-pixbuf-private.h"
#include "gdk-pixbuf-io.h"
-#include <unistd.h>
+#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
\f
-typedef struct _TiffData TiffData;
-struct _TiffData
+typedef struct _TiffContext TiffContext;
+struct _TiffContext
{
- ModulePreparedNotifyFunc prepare_func;
- ModuleUpdatedNotifyFunc update_func;
+ GdkPixbufModuleSizeFunc size_func;
+ GdkPixbufModulePreparedFunc prepare_func;
+ GdkPixbufModuleUpdatedFunc update_func;
gpointer user_data;
-
- gchar *tempname;
- FILE *file;
- gboolean all_okay;
+
+ guchar *buffer;
+ guint allocated;
+ guint used;
+ guint pos;
};
\f
-GdkPixbuf *
-image_load_real (FILE *f, TiffData *context)
+static char *global_error = NULL;
+static TIFFErrorHandler orig_error_handler = NULL;
+static TIFFErrorHandler orig_warning_handler = NULL;
+
+static void
+tiff_warning_handler (const char *mod, const char *fmt, va_list ap)
{
- TIFF *tiff;
- guchar *pixels = NULL;
- guchar *tmppix;
- gint w, h, x, y, num_pixs, fd;
- uint32 *rast, *tmp_rast;
- GdkPixbuf *pixbuf;
-
- fd = fileno (f);
- tiff = TIFFFdOpen (fd, "libpixbuf-tiff", "r");
+ /* Don't print anything; we should not be dumping junk to
+ * stderr, since that may be bad for some apps.
+ */
+
+ /* libTIFF seems to occasionally warn about things that
+ * are really errors, so maybe we should just call tiff_error_handler
+ * here.
+ */
+}
- if (!tiff)
- return NULL;
+static void
+tiff_error_handler (const char *mod, const char *fmt, va_list ap)
+{
+ if (global_error) {
+ /* Blah, loader called us twice */
+ return;
+ }
- TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &w);
- TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &h);
- num_pixs = w * h;
- pixbuf = gdk_pixbuf_new (ART_PIX_RGB, TRUE, 8, w, h);
+ global_error = g_strdup_vprintf (fmt, ap);
+}
- if (context)
- (* context->prepare_func) (pixbuf, context->user_data);
+static void
+tiff_push_handlers (void)
+{
+ if (global_error)
+ g_warning ("TIFF loader left crufty global_error around, FIXME");
+
+ orig_error_handler = TIFFSetErrorHandler (tiff_error_handler);
+ orig_warning_handler = TIFFSetWarningHandler (tiff_warning_handler);
+}
- /* Yes, it needs to be _TIFFMalloc... */
- rast = (uint32 *) _TIFFmalloc (num_pixs * sizeof (uint32));
+static void
+tiff_pop_handlers (void)
+{
+ if (global_error)
+ g_warning ("TIFF loader left crufty global_error around, FIXME");
+
+ TIFFSetErrorHandler (orig_error_handler);
+ TIFFSetWarningHandler (orig_warning_handler);
+}
- if (!rast) {
- TIFFClose (tiff);
- return NULL;
+static void
+tiff_set_error (GError **error,
+ int error_code,
+ const char *msg)
+{
+ /* Take the error message from libtiff and merge it with
+ * some context we provide.
+ */
+ if (global_error) {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ error_code,
+ "%s%s%s", msg, ": ", global_error);
+
+ g_free (global_error);
+ global_error = NULL;
+ }
+ else {
+ g_set_error_literal (error,
+ GDK_PIXBUF_ERROR,
+ error_code, msg);
+ }
+}
+
+\f
+
+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;
+ uint16 orientation = 0;
+ uint16 transform = 0;
+ uint16 codec;
+ gchar *icc_profile_base64;
+ const gchar *icc_profile;
+ guint icc_profile_size;
+ gint retval;
+
+ /* We're called with the lock held. */
+
+ g_return_val_if_fail (global_error == NULL, NULL);
+
+ if (!TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width) || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Could not get image width (bad TIFF file)"));
+ return NULL;
+ }
+
+ if (!TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height) || global_error) {
+ tiff_set_error (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;
+ }
+
+ rowstride = width * 4;
+ if (rowstride / 4 != width) { /* 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 (bytes / rowstride != height) { /* overflow */
+ g_set_error_literal (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+ _("Dimensions of TIFF image too large"));
+ return NULL;
+ }
+
+ 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;
+ }
+
+ /* 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);
}
- if (TIFFReadRGBAImage (tiff, w, h, rast, 0)) {
- pixels = gdk_pixbuf_get_pixels (pixbuf);
- if (!pixels) {
- _TIFFfree (rast);
- TIFFClose (tiff);
- return NULL;
- }
- tmppix = pixels;
-
- for (y = 0; y < h; y++) {
- /* Unexplainable...are tiffs backwards? */
- /* Also looking at the GIMP plugin, this
- * whole reading thing can be a bit more
- * robust.
- */
- tmp_rast = rast + ((h - y - 1) * w);
- for (x = 0; x < w; x++) {
- tmppix[0] = TIFFGetR (*tmp_rast);
- tmppix[1] = TIFFGetG (*tmp_rast);
- tmppix[2] = TIFFGetB (*tmp_rast);
- tmppix[3] = TIFFGetA (*tmp_rast);
- tmp_rast++;
- tmppix += 4;
- }
- }
+ 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);
+ }
+
+ if (context && context->prepare_func)
+ (* context->prepare_func) (pixbuf, NULL, context->user_data);
+
+ if (!TIFFReadRGBAImageOriented (tiff, width, height, (uint32 *)pixels, ORIENTATION_TOPLEFT, 1) || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to load RGB data from TIFF file"));
+ g_object_unref (pixbuf);
+ return NULL;
}
- _TIFFfree (rast);
- TIFFClose (tiff);
- if (context) {
- gdk_pixbuf_unref (pixbuf);
- (* context->update_func) (pixbuf, context->user_data, 0, 0, w, h);
+#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
- return pixbuf;
+ if (context && context->update_func)
+ (* context->update_func) (pixbuf, 0, 0, width, height, context->user_data);
+
+ return pixbuf;
}
\f
/* Static loader */
-GdkPixbuf *
-image_load (FILE *f)
+static GdkPixbuf *
+gdk_pixbuf__tiff_image_load (FILE *f, GError **error)
{
- return image_load_real (f, NULL);
+ TIFF *tiff;
+ int fd;
+ GdkPixbuf *pixbuf;
+
+ g_return_val_if_fail (f != NULL, NULL);
+
+ tiff_push_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 || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+ _("Failed to open TIFF image"));
+ tiff_pop_handlers ();
+
+ return NULL;
+ }
+
+ pixbuf = tiff_image_parse (tiff, NULL, error);
+
+ TIFFClose (tiff);
+ if (global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("TIFFClose operation failed"));
+ }
+
+ tiff_pop_handlers ();
+
+ return pixbuf;
}
\f
/* Progressive loader */
-/*
- * Tiff loading progressively cannot be done. We write it to a file, then load
- * the file when it's done. It's not pretty.
- */
-
-gpointer
-image_begin_load (ModulePreparedNotifyFunc prepare_func,
- ModuleUpdatedNotifyFunc update_func,
- gpointer user_data)
+static gpointer
+gdk_pixbuf__tiff_image_begin_load (GdkPixbufModuleSizeFunc size_func,
+ GdkPixbufModulePreparedFunc prepare_func,
+ GdkPixbufModuleUpdatedFunc update_func,
+ gpointer user_data,
+ GError **error)
{
- TiffData *context;
- gint fd;
-
- context = g_new (TiffData, 1);
+ 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->all_okay = TRUE;
- context->tempname = g_strdup ("/tmp/gdkpixbuf-tif-tmp.XXXXXX");
- fd = mkstemp (context->tempname);
- if (fd < 0) {
- g_free (context);
- return NULL;
- }
+ context->buffer = NULL;
+ context->allocated = 0;
+ context->used = 0;
+ context->pos = 0;
+
+ return context;
+}
- context->file = fdopen (fd, "w");
- if (context->file == NULL) {
- g_free (context);
- return NULL;
- }
+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;
+}
- return context;
+static tsize_t
+tiff_load_write (thandle_t handle, tdata_t buf, tsize_t size)
+{
+ return -1;
}
-void
-image_stop_load (gpointer data)
+static toff_t
+tiff_load_seek (thandle_t handle, toff_t offset, int whence)
{
- TiffData *context = (TiffData*) data;
+ 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;
+}
- g_return_if_fail (data != NULL);
+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;
+}
- fflush (context->file);
- rewind (context->file);
- if (context->all_okay)
- image_load_real (context->file, context);
+static void
+tiff_load_unmap_file (thandle_t handle, tdata_t data, toff_t offset)
+{
+}
- fclose (context->file);
- unlink (context->tempname);
- g_free ((TiffData *) context);
+static gboolean
+gdk_pixbuf__tiff_image_stop_load (gpointer data,
+ GError **error)
+{
+ TiffContext *context = data;
+ TIFF *tiff;
+ gboolean retval;
+
+ g_return_val_if_fail (data != NULL, FALSE);
+
+ tiff_push_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 || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to load TIFF image"));
+ retval = FALSE;
+ } else {
+ GdkPixbuf *pixbuf;
+
+ pixbuf = tiff_image_parse (tiff, context, error);
+ if (pixbuf)
+ g_object_unref (pixbuf);
+ retval = pixbuf != NULL;
+ if (global_error)
+ {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to load TIFF image"));
+ tiff_pop_handlers ();
+
+ retval = FALSE;
+ }
+ }
+
+ if (tiff)
+ TIFFClose (tiff);
+
+ g_assert (!global_error);
+
+ g_free (context->buffer);
+ g_free (context);
+
+ tiff_pop_handlers ();
+
+ return retval;
}
-gboolean
-image_load_increment (gpointer data, guchar *buf, guint size)
+static gboolean
+make_available_at_least (TiffContext *context, guint needed)
{
- TiffData *context = (TiffData *) data;
+ 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);
+
+ 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;
+}
- if (fwrite (buf, sizeof (guchar), size, context->file) != size) {
- context->all_okay = FALSE;
- return FALSE;
+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 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;
+ guchar *pixels;
+ gboolean has_alpha;
+ gushort alpha_samples[1] = { EXTRASAMPLE_UNASSALPHA };
+ int y;
+ TiffSaveContext *context;
+ gboolean retval;
+ guchar *icc_profile = NULL;
+ gsize icc_profile_size = 0;
+
+ tiff_push_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 || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to save TIFF image"));
+
+ tiff_pop_handlers ();
+
+ 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);
+
+ TIFFSetField (tiff, TIFFTAG_IMAGEWIDTH, width);
+ TIFFSetField (tiff, TIFFTAG_IMAGELENGTH, height);
+ TIFFSetField (tiff, TIFFTAG_BITSPERSAMPLE, 8);
+ TIFFSetField (tiff, TIFFTAG_SAMPLESPERPIXEL, has_alpha ? 4 : 3);
+ TIFFSetField (tiff, TIFFTAG_ROWSPERSTRIP, 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], "compression")) {
+ guint16 codec = strtol (values[i], NULL, 0);
+ if (TIFFIsCODECConfigured (codec))
+ TIFFSetField (tiff, TIFFTAG_COMPRESSION, codec);
+ else {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("TIFF compression doesn't refer to a valid codec."));
+ retval = FALSE;
+ goto cleanup;
+ }
+ } else if (g_str_equal (keys[i], "icc-profile")) {
+ /* decode from base64 */
+ icc_profile = g_base64_decode (values[i], &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;
+ goto cleanup;
+ }
+ }
+ i++;
+ }
+ }
+
+ if (has_alpha)
+ TIFFSetField (tiff, TIFFTAG_EXTRASAMPLES, 1, alpha_samples);
+
+ TIFFSetField (tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
+ TIFFSetField (tiff, TIFFTAG_FILLORDER, FILLORDER_MSB2LSB);
+ TIFFSetField (tiff, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
+
+ if (icc_profile != NULL)
+ TIFFSetField (tiff, TIFFTAG_ICCPROFILE, icc_profile_size, icc_profile);
+
+ for (y = 0; y < height; y++) {
+ if (TIFFWriteScanline (tiff, pixels + y * rowstride, y, 0) == -1 ||
+ global_error)
+ break;
+ }
+
+ if (global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to write TIFF data"));
+
+ TIFFClose (tiff);
+ retval = FALSE;
+ goto cleanup;
+ }
+
+ TIFFClose (tiff);
+ if (global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("TIFFClose operation failed"));
+ retval = FALSE;
+ goto cleanup;
+ }
+
+
+ /* Now call the callback */
+ retval = save_func (context->buffer, context->used, error, user_data);
+
+cleanup:
+ g_free (icc_profile);
+ tiff_pop_handlers ();
+ 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);
+}
+
+#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_ENTRY (fill_info) (GdkPixbufFormat *info)
+{
+ static GdkPixbufModulePattern signature[] = {
+ { "MM \x2a", " z ", 100 },
+ { "II\x2a ", " z", 100 },
+ { "II* \020 CR\002 ", " z zzz z", 0 },
+ { NULL, NULL, 0 }
+ };
+ static gchar * mime_types[] = {
+ "image/tiff",
+ NULL
+ };
+ static gchar * extensions[] = {
+ "tiff",
+ "tif",
+ NULL
+ };
+
+ info->name = "tiff";
+ info->signature = signature;
+ info->description = N_("The TIFF image format");
+ info->mime_types = mime_types;
+ info->extensions = extensions;
+ /* not threadsafe, due to the error handler handling */
+ info->flags = GDK_PIXBUF_FORMAT_WRITABLE;
+ info->license = "LGPL";
+}
projects / ~andy / gtk / blobdiff