diff options
Diffstat (limited to 'fiv-io.c')
| -rw-r--r-- | fiv-io.c | 126 |
1 files changed, 120 insertions, 6 deletions
@@ -1143,11 +1143,94 @@ fail: return surface; } +// --- Multi-Picture Format ---------------------------------------------------- + +static uint32_t +parse_mpf_mpentry(const uint8_t *p, const struct tiffer *T) +{ + uint32_t attrs = T->un->u32(p); + uint32_t offset = T->un->u32(p + 8); + + enum { + TypeBaselineMPPrimaryImage = 0x030000, + TypeLargeThumbnailVGA = 0x010001, + TypeLargeThumbnailFullHD = 0x010002, + TypeMultiFrameImagePanorama = 0x020001, + TypeMultiFrameImageDisparity = 0x020002, + TypeMultiFrameImageMultiAngle = 0x020003, + TypeUndefined = 0x000000, + }; + switch (attrs & 0xFFFFFF) { + case TypeLargeThumbnailVGA: + case TypeLargeThumbnailFullHD: + // Wasted cycles. + case TypeUndefined: + // Apple uses this for HDR and depth maps (same and lower resolution). + // TODO(p): It would be nice to be able to view them. + return 0; + } + + // Don't report non-JPEGs, even though they're unlikely. + if (((attrs >> 24) & 0x7) != 0) + return 0; + + return offset; +} + +static uint32_t * +parse_mpf_index_entries(const struct tiffer *T, struct tiffer_entry *entry) +{ + uint32_t count = entry->remaining_count / 16; + uint32_t *offsets = g_malloc0_n(sizeof *offsets, count + 1), *out = offsets; + for (uint32_t i = 0; i < count; i++) { + // 5.2.3.3.3. Individual Image Data Offset + uint32_t offset = parse_mpf_mpentry(entry->p + i * 16, T); + if (offset) + *out++ = offset; + } + return offsets; +} + +static uint32_t * +parse_mpf_index_ifd(struct tiffer *T) +{ + struct tiffer_entry entry = {}; + while (tiffer_next_entry(T, &entry)) { + // 5.2.3.3. MP Entry + if (entry.tag == MPF_MPEntry && entry.type == UNDEFINED && + !(entry.remaining_count % 16)) { + return parse_mpf_index_entries(T, &entry); + } + } + return NULL; +} + +static bool +parse_mpf( + GPtrArray *individuals, const uint8_t *mpf, size_t len, const uint8_t *end) +{ + struct tiffer T; + if (!tiffer_init(&T, mpf, len) || !tiffer_next_ifd(&T)) + return false; + + // First image: IFD0 is Index IFD, any IFD1 is Attribute IFD. + // Other images: IFD0 is Attribute IFD, there is no Index IFD. + uint32_t *offsets = parse_mpf_index_ifd(&T); + if (offsets) { + for (const uint32_t *o = offsets; *o; o++) + if (*o <= end - mpf) + g_ptr_array_add(individuals, (gpointer) mpf + *o); + free(offsets); + } + return true; +} + // --- JPEG -------------------------------------------------------------------- struct jpeg_metadata { GByteArray *exif; ///< Exif buffer or NULL GByteArray *icc; ///< ICC profile buffer or NULL + GPtrArray *mpf; ///< Multi-Picture Format or NULL int width; ///< Image width int height; ///< Image height }; @@ -1234,6 +1317,14 @@ parse_jpeg_metadata(const char *data, size_t len, struct jpeg_metadata *meta) icc_done = payload[-1] == icc_sequence; } + // CIPA DC-007-2021 (Multi-Picture Format) 5.2 + // https://www.cipa.jp/e/std/std-sec.html + if (meta->mpf && marker == APP2 && p - payload >= 8 && + !memcmp(payload, "MPF\0", 4) && !meta->mpf->len) { + payload += 4; + parse_mpf(meta->mpf, payload, p - payload, end); + } + // TODO(p): Extract the main XMP segment. } @@ -1241,15 +1332,38 @@ parse_jpeg_metadata(const char *data, size_t len, struct jpeg_metadata *meta) g_byte_array_set_size(meta->icc, 0); } +static cairo_surface_t *open_libjpeg_turbo( + const char *data, gsize len, const FivIoOpenContext *ctx, GError **error); + static void load_jpeg_finalize(cairo_surface_t *surface, bool cmyk, - FivIoProfile destination, const char *data, size_t len) + const FivIoOpenContext *ctx, const char *data, size_t len) { struct jpeg_metadata meta = { - .exif = g_byte_array_new(), .icc = g_byte_array_new()}; + .exif = g_byte_array_new(), + .icc = g_byte_array_new(), + .mpf = g_ptr_array_new(), + }; parse_jpeg_metadata(data, len, &meta); + if (!ctx->first_frame_only) { + // XXX: This is ugly, as it relies on just the first individual image + // having any follow-up entries (as it should be). + cairo_surface_t *surface_tail = surface; + for (guint i = 0; i < meta.mpf->len; i++) { + const char *jpeg = meta.mpf->pdata[i]; + GError *error = NULL; + if (!try_append_page( + open_libjpeg_turbo(jpeg, len - (jpeg - data), ctx, &error), + &surface, &surface_tail)) { + add_warning(ctx, "MPF image %d: %s", i + 2, error->message); + g_error_free(error); + } + } + } + g_ptr_array_free(meta.mpf, TRUE); + if (meta.exif->len) cairo_surface_set_user_data(surface, &fiv_io_key_exif, g_byte_array_free_to_bytes(meta.exif), @@ -1271,9 +1385,9 @@ load_jpeg_finalize(cairo_surface_t *surface, bool cmyk, g_bytes_get_data(icc_profile, NULL), g_bytes_get_size(icc_profile)); if (cmyk) - fiv_io_profile_cmyk(surface, source, destination); + fiv_io_profile_cmyk(surface, source, ctx->screen_profile); else - fiv_io_profile_xrgb32(surface, source, destination); + fiv_io_profile_xrgb32(surface, source, ctx->screen_profile); if (source) fiv_io_profile_free(source); @@ -1358,7 +1472,7 @@ open_libjpeg_turbo( } } - load_jpeg_finalize(surface, use_cmyk, ctx->screen_profile, data, len); + load_jpeg_finalize(surface, use_cmyk, ctx, data, len); tjDestroy(dec); return surface; } @@ -1445,7 +1559,7 @@ open_libjpeg_enhanced( surface_data, cinfo.output_width * cinfo.output_height); (void) jpegqs_finish_decompress(&cinfo); - load_jpeg_finalize(surface, use_cmyk, ctx->screen_profile, data, len); + load_jpeg_finalize(surface, use_cmyk, ctx, data, len); jpeg_destroy_decompress(&cinfo); return surface; } |