Support using libtiff directly
Multiple directories are read as multiple pages. The error handling is mildly questionable, as is libtiff.
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@ -2,7 +2,7 @@ fastiv
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======
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'fastiv' is a fast image viewer, supporting BMP, PNG, GIF, JPEG, and optionally
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RAW, SVG and X11 cursors, or whatever gdk-pixbuf loads.
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RAW, SVG, X11 cursors and TIFF, or whatever gdk-pixbuf loads.
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It still has some road to go, but it's already become quite usable,
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and it has received basic polishing.
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@ -25,7 +25,7 @@ Building and Running
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Build dependencies: Meson, pkg-config +
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Runtime dependencies: gtk+-3.0, glib>=2.64, pixman-1, shared-mime-info,
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spng>=0.7.0, libturbojpeg, LibRaw (optional), librsvg-2.0 (optional),
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xcursor (optional), gdk-pixbuf-2.0 (optional)
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xcursor (optional), libtiff (optional), gdk-pixbuf-2.0 (optional)
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$ git clone --recursive https://git.janouch.name/p/fastiv.git
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$ meson builddir
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227
fastiv-io.c
227
fastiv-io.c
@ -33,6 +33,10 @@
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#ifdef HAVE_XCURSOR
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#include <X11/Xcursor/Xcursor.h>
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#endif // HAVE_XCURSOR
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#ifdef HAVE_LIBTIFF
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#include <tiff.h>
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#include <tiffio.h>
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#endif // HAVE_LIBTIFF
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#ifdef HAVE_GDKPIXBUF
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#include <gdk/gdk.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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@ -75,6 +79,9 @@ const char *fastiv_io_supported_media_types[] = {
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#ifdef HAVE_XCURSOR
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"image/x-xcursor",
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#endif // HAVE_XCURSOR
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#ifdef HAVE_LIBTIFF
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"image/tiff",
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#endif // HAVE_LIBTIFF
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NULL
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};
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@ -1010,6 +1017,217 @@ open_xcursor(const gchar *data, gsize len, GError **error)
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}
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#endif // HAVE_XCURSOR --------------------------------------------------------
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#ifdef HAVE_LIBTIFF //---------------------------------------------------------
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struct fastiv_io_tiff {
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unsigned char *data;
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gchar *error;
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// No, libtiff, the offset is not supposed to be unsigned (also see:
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// man 0p sys_types.h), but at least it's fewer cases for us to care about.
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toff_t position, len;
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};
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static tsize_t
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fastiv_io_tiff_read(thandle_t h, tdata_t buf, tsize_t len)
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{
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struct fastiv_io_tiff *io = h;
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if (len < 0) {
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// What the FUCK! This argument is not supposed to be signed!
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// How many mistakes can you make in such a basic API?
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errno = EOWNERDEAD;
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return -1;
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}
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if (io->position > io->len) {
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errno = EOVERFLOW;
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return -1;
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}
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toff_t n = MIN(io->len - io->position, (toff_t) len);
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if (n > TIFF_TMSIZE_T_MAX) {
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errno = EIO;
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return -1;
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}
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memcpy(buf, io->data + io->position, n);
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io->position += n;
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return n;
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}
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static tsize_t
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fastiv_io_tiff_write(G_GNUC_UNUSED thandle_t h,
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G_GNUC_UNUSED tdata_t buf, G_GNUC_UNUSED tsize_t len)
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{
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errno = EBADF;
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return -1;
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}
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static toff_t
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fastiv_io_tiff_seek(thandle_t h, toff_t offset, int whence)
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{
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struct fastiv_io_tiff *io = h;
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switch (whence) {
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case SEEK_SET:
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io->position = offset;
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break;
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case SEEK_CUR:
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io->position += offset;
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break;
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case SEEK_END:
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io->position = io->len + offset;
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break;
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default:
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errno = EINVAL;
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return -1;
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}
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return io->position;
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}
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static int
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fastiv_io_tiff_close(G_GNUC_UNUSED thandle_t h)
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{
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return 0;
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}
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static toff_t
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fastiv_io_tiff_size(thandle_t h)
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{
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return ((struct fastiv_io_tiff *) h)->len;
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}
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static void
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fastiv_io_tiff_error(thandle_t h,
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const char *module, const char *format, va_list ap)
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{
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struct fastiv_io_tiff *io = h;
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gchar *message = g_strdup_vprintf(format, ap);
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if (io->error)
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// I'm not sure if two errors can ever come in a succession,
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// but make sure to log them in any case.
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g_warning("tiff: %s: %s", module, message);
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else
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io->error = g_strconcat(module, ": ", message, NULL);
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g_free(message);
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}
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static void
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fastiv_io_tiff_warning(G_GNUC_UNUSED thandle_t h,
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const char *module, const char *format, va_list ap)
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{
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gchar *message = g_strdup_vprintf(format, ap);
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g_debug("tiff: %s: %s", module, message);
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g_free(message);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static cairo_surface_t *
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load_libtiff_directory(TIFF *tiff, GError **error)
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{
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char emsg[1024] = "";
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if (!TIFFRGBAImageOK(tiff, emsg)) {
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set_error(error, emsg);
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return NULL;
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}
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// TODO(p): Are there cases where we might not want to "stop on error"?
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TIFFRGBAImage image;
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if (!TIFFRGBAImageBegin(&image, tiff, 1 /* stop on error */, emsg)) {
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set_error(error, emsg);
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return NULL;
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}
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if (image.width > G_MAXINT || image.height >= G_MAXINT ||
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G_MAXUINT32 / image.width < image.height) {
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set_error(error, "image dimensions too large");
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TIFFRGBAImageEnd(&image);
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return NULL;
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}
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cairo_surface_t *surface = cairo_image_surface_create(
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CAIRO_FORMAT_ARGB32, image.width, image.height);
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uint32_t *raster = (uint32_t *) cairo_image_surface_get_data(surface);
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image.req_orientation = ORIENTATION_LEFTTOP;
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if (TIFFRGBAImageGet(&image, raster, image.width, image.height)) {
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// Needs to be converted from ABGR to ARGB for Cairo,
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// and then premultiplied.
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for (uint32_t i = image.width * image.height; i--; ) {
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uint32_t pixel = raster[i],
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a = TIFFGetA(pixel),
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b = TIFFGetB(pixel) * a / 255,
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g = TIFFGetG(pixel) * a / 255,
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r = TIFFGetR(pixel) * a / 255;
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raster[i] = a << 24 | r << 16 | g << 8 | b;
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}
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cairo_surface_mark_dirty(surface);
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} else {
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g_clear_pointer(&surface, cairo_surface_destroy);
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}
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TIFFRGBAImageEnd(&image);
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return surface;
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}
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static cairo_surface_t *
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open_libtiff(const gchar *data, gsize len, const gchar *path, GError **error)
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{
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// Both kinds of handlers are called, redirect everything.
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TIFFErrorHandler eh = TIFFSetErrorHandler(NULL);
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TIFFErrorHandler wh = TIFFSetWarningHandler(NULL);
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TIFFErrorHandlerExt ehe = TIFFSetErrorHandlerExt(fastiv_io_tiff_error);
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TIFFErrorHandlerExt whe = TIFFSetWarningHandlerExt(fastiv_io_tiff_warning);
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struct fastiv_io_tiff h = {
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.data = (unsigned char *) data,
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.position = 0,
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.len = len,
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};
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cairo_surface_t *result = NULL, *result_tail = NULL;
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TIFF *tiff = TIFFClientOpen(path, "rm" /* Avoid mmap. */, &h,
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fastiv_io_tiff_read, fastiv_io_tiff_write, fastiv_io_tiff_seek,
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fastiv_io_tiff_close, fastiv_io_tiff_size, NULL, NULL);
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if (!tiff)
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goto fail;
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do {
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// We inform about unsupported directories, but do not fail on them.
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GError *err = NULL;
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cairo_surface_t *surface = load_libtiff_directory(tiff, &err);
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if (err) {
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g_warning("%s: %s", path, err->message);
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g_error_free(err);
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}
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if (!surface)
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continue;
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if (result) {
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cairo_surface_set_user_data(result_tail,
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&fastiv_io_key_page_next, surface,
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(cairo_destroy_func_t) cairo_surface_destroy);
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cairo_surface_set_user_data(surface,
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&fastiv_io_key_page_previous, result_tail, NULL);
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result_tail = surface;
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} else {
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result = result_tail = surface;
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}
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} while (TIFFReadDirectory(tiff));
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TIFFClose(tiff);
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fail:
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if (h.error) {
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g_clear_pointer(&result, cairo_surface_destroy);
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set_error(error, h.error);
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g_free(h.error);
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} else if (!result) {
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set_error(error, "empty or unsupported image");
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}
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TIFFSetErrorHandlerExt(ehe);
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TIFFSetWarningHandlerExt(whe);
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TIFFSetErrorHandler(eh);
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TIFFSetWarningHandler(wh);
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return result;
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}
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#endif // HAVE_LIBTIFF --------------------------------------------------------
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#ifdef HAVE_GDKPIXBUF // ------------------------------------------------------
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static cairo_surface_t *
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@ -1149,6 +1367,15 @@ fastiv_io_open_from_data(const char *data, size_t len, const gchar *path,
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g_clear_error(error);
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}
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#endif // HAVE_XCURSOR --------------------------------------------------------
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#ifdef HAVE_LIBTIFF //---------------------------------------------------------
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// This needs to be positioned after LibRaw.
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if ((surface = open_libtiff(data, len, path, error)))
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break;
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if (error) {
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g_debug("%s", (*error)->message);
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g_clear_error(error);
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}
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#endif // HAVE_LIBTIFF --------------------------------------------------------
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#ifdef HAVE_GDKPIXBUF // ------------------------------------------------------
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// This is only used as a last resort, the rest above is special-cased.
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if ((surface = open_gdkpixbuf(data, len, error)) ||
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@ -10,6 +10,7 @@ add_project_arguments(
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libraw = dependency('libraw', required : get_option('libraw'))
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librsvg = dependency('librsvg-2.0', required : get_option('librsvg'))
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xcursor = dependency('xcursor', required : get_option('xcursor'))
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libtiff = dependency('libtiff-4', required : get_option('libtiff'))
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gdkpixbuf = dependency('gdk-pixbuf-2.0', required : get_option('gdk-pixbuf'))
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dependencies = [
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dependency('gtk+-3.0'),
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@ -20,6 +21,7 @@ dependencies = [
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libraw,
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librsvg,
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xcursor,
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libtiff,
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gdkpixbuf,
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meson.get_compiler('c').find_library('m', required : false),
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]
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@ -30,6 +32,7 @@ conf.set_quoted('PROJECT_VERSION', meson.project_version())
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conf.set('HAVE_LIBRAW', libraw.found())
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conf.set('HAVE_LIBRSVG', librsvg.found())
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conf.set('HAVE_XCURSOR', xcursor.found())
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conf.set('HAVE_LIBTIFF', libtiff.found())
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conf.set('HAVE_GDKPIXBUF', gdkpixbuf.found())
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configure_file(
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output : 'config.h',
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@ -4,5 +4,7 @@ option('librsvg', type : 'feature', value : 'auto',
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description : 'Build with SVG support, requires librsvg')
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option('xcursor', type : 'feature', value : 'auto',
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description : 'Build with Xcursor support, requires libXcursor')
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option('libtiff', type : 'feature', value : 'auto',
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description : 'Build with TIFF support, requires libtiff')
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option('gdk-pixbuf', type : 'feature', value : 'auto',
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description : 'Build with a fallback to the gdk-pixbuf library')
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