+++ /dev/null
-/*
- * Geeqie
- * (C) 2004 John Ellis
- * Copyright (C) 2008 - 2011 The Geeqie Team
- *
- * Author: Vladimir Nadvornik
- *
- * This software is released under the GNU General Public License (GNU GPL).
- * Please read the included file COPYING for more information.
- * This software comes with no warranty of any kind, use at your own risk!
- */
-
-/* based on code from 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 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, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#include "main.h"
-
-#include "image-load.h"
-#include "image_load_tiff.h"
-
-#ifdef HAVE_TIFF
-
-#include <tiffio.h>
-
-typedef struct _ImageLoaderTiff ImageLoaderTiff;
-struct _ImageLoaderTiff {
- ImageLoaderBackendCbAreaUpdated area_updated_cb;
- ImageLoaderBackendCbSize size_cb;
- ImageLoaderBackendCbAreaPrepared area_prepared_cb;
-
- gpointer data;
-
- GdkPixbuf *pixbuf;
- guint requested_width;
- guint requested_height;
-
- gboolean abort;
-
- const guchar *buffer;
- toff_t used;
- toff_t pos;
-};
-
-static void free_buffer (guchar *pixels, gpointer data)
-{
- g_free (pixels);
-}
-
-static tsize_t
-tiff_load_read (thandle_t handle, tdata_t buf, tsize_t size)
-{
- ImageLoaderTiff *context = (ImageLoaderTiff *)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)
-{
- ImageLoaderTiff *context = (ImageLoaderTiff *)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)
-{
- ImageLoaderTiff *context = (ImageLoaderTiff *)handle;
-
- return context->used;
-}
-
-static int
-tiff_load_map_file (thandle_t handle, tdata_t *buf, toff_t *size)
-{
- ImageLoaderTiff *context = (ImageLoaderTiff *)handle;
-
- *buf = (tdata_t *) context->buffer;
- *size = context->used;
-
- return 0;
-}
-
-static void
-tiff_load_unmap_file (thandle_t handle, tdata_t data, toff_t offset)
-{
-}
-
-static gboolean image_loader_tiff_load (gpointer loader, const guchar *buf, gsize count, GError **error)
-{
- ImageLoaderTiff *lt = (ImageLoaderTiff *) loader;
-
- TIFF *tiff;
- guchar *pixels = NULL;
- gint width, height, rowstride, bytes;
- uint16 orientation = 0;
- uint16 transform = 0;
- uint32 rowsperstrip;
-
- lt->buffer = buf;
- lt->used = count;
- lt->pos = 0;
-
- TIFFSetWarningHandler(NULL);
-
- tiff = TIFFClientOpen ("libtiff-geeqie", "r", lt,
- 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)
- {
- DEBUG_1("Failed to open TIFF image");
- return FALSE;
- }
-
-
-
- if (!TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width)) {
- DEBUG_1("Could not get image width (bad TIFF file)");
- TIFFClose(tiff);
- return FALSE;
- }
-
- if (!TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height)) {
- DEBUG_1("Could not get image height (bad TIFF file)");
- TIFFClose(tiff);
- return FALSE;
- }
-
- if (width <= 0 || height <= 0) {
- DEBUG_1("Width or height of TIFF image is zero");
- TIFFClose(tiff);
- return FALSE;
- }
-
- rowstride = width * 4;
- if (rowstride / 4 != width) { /* overflow */
- DEBUG_1("Dimensions of TIFF image too large");
- TIFFClose(tiff);
- return FALSE;
- }
-
- bytes = height * rowstride;
- if (bytes / rowstride != height) { /* overflow */
- DEBUG_1("Dimensions of TIFF image too large");
- TIFFClose(tiff);
- return FALSE;
- }
-
- lt->requested_width = width;
- lt->requested_height = height;
- lt->size_cb(loader, lt->requested_width, lt->requested_height, lt->data);
-
- pixels = g_try_malloc (bytes);
-
- if (!pixels) {
- DEBUG_1("Insufficient memory to open TIFF file");
- TIFFClose(tiff);
- return FALSE;
- }
-
- lt->pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
- width, height, rowstride,
- free_buffer, NULL);
- if (!lt->pixbuf) {
- g_free (pixels);
- DEBUG_1("Insufficient memory to open TIFF file");
- TIFFClose(tiff);
- return FALSE;
- }
-
- /* 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;
- }
-
-
- lt->area_prepared_cb(loader, lt->data);
-
-
-
- if( TIFFGetField(tiff, TIFFTAG_ROWSPERSTRIP, &rowsperstrip) )
- {
- /* read by strip */
- int row;
- guchar *wrk_line = (guchar *)g_malloc(width * sizeof (uint32));
-
-
- for( row = 0; row < height; row += rowsperstrip )
- {
- int rows_to_write, i_row;
-
- if (lt->abort) {
- break;
- }
-
- /* Read the strip into an RGBA array */
- if (!TIFFReadRGBAStrip(tiff, row, (uint32 *)(pixels + row * rowstride))) {
- break;
- }
-
- /*
- * Figure out the number of scanlines actually in this strip.
- */
- if( row + (int)rowsperstrip > height )
- rows_to_write = height - row;
- else
- rows_to_write = rowsperstrip;
-
-
-
- /*
- * For some reason the TIFFReadRGBAStrip() function chooses the
- * lower left corner as the origin. Vertically mirror scanlines.
- */
- for( i_row = 0; i_row < rows_to_write / 2; i_row++ )
- {
- guchar *top_line, *bottom_line;
-
- top_line = pixels + (row + i_row) * rowstride;
- bottom_line = pixels + (row + rows_to_write - i_row - 1) * rowstride;
-
- memcpy(wrk_line, top_line, 4*width);
- memcpy(top_line, bottom_line, 4*width);
- memcpy(bottom_line, wrk_line, 4*width);
- }
- lt->area_updated_cb(loader, 0, row, width, rows_to_write, lt->data);
- }
- g_free(wrk_line);
- }
- else
- {
- /* fallback, tiled tiff */
- if (!TIFFReadRGBAImageOriented (tiff, width, height, (uint32 *)pixels, ORIENTATION_TOPLEFT, 1))
- {
- TIFFClose(tiff);
- return FALSE;
- }
-
-#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
-
- lt->area_updated_cb(loader, 0, 0, width, height, lt->data);
- }
- TIFFClose(tiff);
-
- return TRUE;
-}
-
-
-static gpointer image_loader_tiff_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
-{
- ImageLoaderTiff *loader = g_new0(ImageLoaderTiff, 1);
-
- loader->area_updated_cb = area_updated_cb;
- loader->size_cb = size_cb;
- loader->area_prepared_cb = area_prepared_cb;
- loader->data = data;
- return (gpointer) loader;
-}
-
-
-static void image_loader_tiff_set_size(gpointer loader, int width, int height)
-{
- ImageLoaderTiff *lt = (ImageLoaderTiff *) loader;
- lt->requested_width = width;
- lt->requested_height = height;
-}
-
-static GdkPixbuf* image_loader_tiff_get_pixbuf(gpointer loader)
-{
- ImageLoaderTiff *lt = (ImageLoaderTiff *) loader;
- return lt->pixbuf;
-}
-
-static gchar* image_loader_tiff_get_format_name(gpointer loader)
-{
- return g_strdup("tiff");
-}
-static gchar** image_loader_tiff_get_format_mime_types(gpointer loader)
-{
- static gchar *mime[] = {"image/tiff", NULL};
- return g_strdupv(mime);
-}
-
-static gboolean image_loader_tiff_close(gpointer loader, GError **error)
-{
- return TRUE;
-}
-
-static void image_loader_tiff_abort(gpointer loader)
-{
- ImageLoaderTiff *lt = (ImageLoaderTiff *) loader;
- lt->abort = TRUE;
-}
-
-static void image_loader_tiff_free(gpointer loader)
-{
- ImageLoaderTiff *lt = (ImageLoaderTiff *) loader;
- if (lt->pixbuf) g_object_unref(lt->pixbuf);
- g_free(lt);
-}
-
-
-void image_loader_backend_set_tiff(ImageLoaderBackend *funcs)
-{
- funcs->loader_new = image_loader_tiff_new;
- funcs->set_size = image_loader_tiff_set_size;
- funcs->load = image_loader_tiff_load;
- funcs->write = NULL;
- funcs->get_pixbuf = image_loader_tiff_get_pixbuf;
- funcs->close = image_loader_tiff_close;
- funcs->abort = image_loader_tiff_abort;
- funcs->free = image_loader_tiff_free;
-
- funcs->get_format_name = image_loader_tiff_get_format_name;
- funcs->get_format_mime_types = image_loader_tiff_get_format_mime_types;
-}
-
-
-
-#endif
\ No newline at end of file
projects / geeqie.git / blobdiff