2 * Copyright (C) 1999 Mark Crichton
3 * Copyright (C) 1999 The Free Software Foundation
4 * Copyright (C) 2004 John Ellis
5 * Copyright (C) 2008 - 2016 The Geeqie Team
7 * Authors: Mark Crichton <crichton@gimp.org>
8 * Federico Mena-Quintero <federico@gimp.org>
9 * Jonathan Blandford <jrb@redhat.com>
10 * S�ren Sandmann <sandmann@daimi.au.dk>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
30 #include "image-load.h"
31 #include "image-load-tiff.h"
37 struct ImageLoaderTiff {
38 ImageLoaderBackendCbAreaUpdated area_updated_cb;
39 ImageLoaderBackendCbSize size_cb;
40 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
45 guint requested_width;
46 guint requested_height;
57 static void free_buffer (guchar *pixels, gpointer)
63 tiff_load_read (thandle_t handle, tdata_t buf, tsize_t size)
65 auto context = static_cast<ImageLoaderTiff *>(handle);
67 if (context->pos + size > context->used)
70 memcpy (buf, context->buffer + context->pos, size);
76 tiff_load_write (thandle_t, tdata_t, tsize_t)
82 tiff_load_seek (thandle_t handle, toff_t offset, int whence)
84 auto context = static_cast<ImageLoaderTiff *>(handle);
89 if (offset > context->used)
91 context->pos = offset;
94 if (offset + context->pos >= context->used)
96 context->pos += offset;
99 if (offset + context->used > context->used)
101 context->pos = context->used + offset;
111 tiff_load_close (thandle_t)
117 tiff_load_size (thandle_t handle)
119 auto context = static_cast<ImageLoaderTiff *>(handle);
120 return context->used;
124 tiff_load_map_file (thandle_t handle, tdata_t *buf, toff_t *size)
126 auto context = static_cast<ImageLoaderTiff *>(handle);
128 *buf = const_cast<guchar *>(context->buffer);
129 *size = context->used;
135 tiff_load_unmap_file (thandle_t, tdata_t, toff_t)
139 static gboolean image_loader_tiff_load (gpointer loader, const guchar *buf, gsize count, GError **)
141 auto lt = static_cast<ImageLoaderTiff *>(loader);
144 guchar *pixels = nullptr;
145 gint width, height, rowstride;
147 guint32 rowsperstrip;
154 TIFFSetWarningHandler(nullptr);
156 tiff = TIFFClientOpen ( "libtiff-geeqie", "r", lt,
157 tiff_load_read, tiff_load_write,
158 tiff_load_seek, tiff_load_close,
160 tiff_load_map_file, tiff_load_unmap_file);
163 DEBUG_1("Failed to open TIFF image");
169 } while (TIFFReadDirectory(tiff));
171 lt->page_total = dircount;
173 if (!TIFFSetDirectory(tiff, lt->page_num))
175 DEBUG_1("Failed to open TIFF image");
180 if (!TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width))
182 DEBUG_1("Could not get image width (bad TIFF file)");
187 if (!TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height))
189 DEBUG_1("Could not get image height (bad TIFF file)");
194 if (width <= 0 || height <= 0)
196 DEBUG_1("Width or height of TIFF image is zero");
201 rowstride = width * 4;
202 if (rowstride / 4 != width)
204 DEBUG_1("Dimensions of TIFF image too large: width %d", width);
209 bytes = static_cast<size_t>(height) * rowstride;
210 if (bytes / rowstride != static_cast<size_t>(height))
212 DEBUG_1("Dimensions of TIFF image too large: height %d", height);
217 lt->requested_width = width;
218 lt->requested_height = height;
219 lt->size_cb(loader, lt->requested_width, lt->requested_height, lt->data);
221 pixels = static_cast<guchar *>(g_try_malloc (bytes));
225 DEBUG_1("Insufficient memory to open TIFF file: need %zu", bytes);
230 lt->pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
231 width, height, rowstride,
232 free_buffer, nullptr);
236 DEBUG_1("Insufficient memory to open TIFF file");
241 lt->area_prepared_cb(loader, lt->data);
243 if (TIFFGetField(tiff, TIFFTAG_ROWSPERSTRIP, &rowsperstrip))
247 const size_t line_bytes = width * sizeof(guint32);
248 auto wrk_line = static_cast<guchar *>(g_malloc(line_bytes));
250 for (row = 0; row < height; row += rowsperstrip)
252 int rows_to_write, i_row;
258 /* Read the strip into an RGBA array */
259 if (!TIFFReadRGBAStrip(tiff, row, reinterpret_cast<guint32 *>(pixels + row * rowstride))) {
264 * Figure out the number of scanlines actually in this strip.
266 if (row + static_cast<int>(rowsperstrip) > height)
267 rows_to_write = height - row;
269 rows_to_write = rowsperstrip;
272 * For some reason the TIFFReadRGBAStrip() function chooses the
273 * lower left corner as the origin. Vertically mirror scanlines.
275 for (i_row = 0; i_row < rows_to_write / 2; i_row++)
277 guchar *top_line, *bottom_line;
279 top_line = pixels + (row + i_row) * rowstride;
280 bottom_line = pixels + (row + rows_to_write - i_row - 1) * rowstride;
282 memcpy(wrk_line, top_line, line_bytes);
283 memcpy(top_line, bottom_line, line_bytes);
284 memcpy(bottom_line, wrk_line, line_bytes);
286 lt->area_updated_cb(loader, 0, row, width, rows_to_write, lt->data);
292 /* fallback, tiled tiff */
293 if (!TIFFReadRGBAImageOriented (tiff, width, height, reinterpret_cast<guint32 *>(pixels), ORIENTATION_TOPLEFT, 1))
299 #if G_BYTE_ORDER == G_BIG_ENDIAN
300 /* Turns out that the packing used by TIFFRGBAImage depends on
301 * the host byte order...
304 guchar *ptr = pixels;
305 while (ptr < pixels + bytes)
307 guint32 pixel = *(guint32 *)ptr;
308 int r = TIFFGetR(pixel);
309 int g = TIFFGetG(pixel);
310 int b = TIFFGetB(pixel);
311 int a = TIFFGetA(pixel);
320 lt->area_updated_cb(loader, 0, 0, width, height, lt->data);
328 static gpointer image_loader_tiff_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
330 auto loader = g_new0(ImageLoaderTiff, 1);
332 loader->area_updated_cb = area_updated_cb;
333 loader->size_cb = size_cb;
334 loader->area_prepared_cb = area_prepared_cb;
340 static void image_loader_tiff_set_size(gpointer loader, int width, int height)
342 auto lt = static_cast<ImageLoaderTiff *>(loader);
343 lt->requested_width = width;
344 lt->requested_height = height;
347 static GdkPixbuf* image_loader_tiff_get_pixbuf(gpointer loader)
349 auto lt = static_cast<ImageLoaderTiff *>(loader);
353 static gchar* image_loader_tiff_get_format_name(gpointer)
355 return g_strdup("tiff");
357 static gchar** image_loader_tiff_get_format_mime_types(gpointer)
359 static const gchar *mime[] = {"image/tiff", nullptr};
360 return g_strdupv(const_cast<gchar **>(mime));
363 static gboolean image_loader_tiff_close(gpointer, GError **)
368 static void image_loader_tiff_abort(gpointer loader)
370 auto lt = static_cast<ImageLoaderTiff *>(loader);
374 static void image_loader_tiff_free(gpointer loader)
376 auto lt = static_cast<ImageLoaderTiff *>(loader);
377 if (lt->pixbuf) g_object_unref(lt->pixbuf);
381 static void image_loader_tiff_set_page_num(gpointer loader, gint page_num)
383 auto lt = static_cast<ImageLoaderTiff *>(loader);
385 lt->page_num = page_num;
388 static gint image_loader_tiff_get_page_total(gpointer loader)
390 auto lt = static_cast<ImageLoaderTiff *>(loader);
392 return lt->page_total;
395 void image_loader_backend_set_tiff(ImageLoaderBackend *funcs)
397 funcs->loader_new = image_loader_tiff_new;
398 funcs->set_size = image_loader_tiff_set_size;
399 funcs->load = image_loader_tiff_load;
400 funcs->write = nullptr;
401 funcs->get_pixbuf = image_loader_tiff_get_pixbuf;
402 funcs->close = image_loader_tiff_close;
403 funcs->abort = image_loader_tiff_abort;
404 funcs->free = image_loader_tiff_free;
406 funcs->get_format_name = image_loader_tiff_get_format_name;
407 funcs->get_format_mime_types = image_loader_tiff_get_format_mime_types;
409 funcs->set_page_num = image_loader_tiff_set_page_num;
410 funcs->get_page_total = image_loader_tiff_get_page_total;
416 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */