diff --git a/README.adoc b/README.adoc index 143c0c8..d245a0f 100644 --- a/README.adoc +++ b/README.adoc @@ -38,7 +38,7 @@ Building and Running -------------------- Build dependencies: Meson, pkg-config + Runtime dependencies: gtk+-3.0, glib>=2.64, pixman-1, shared-mime-info, -libturbojpeg, libwebp, spng>=0.7.0 + +libturbojpeg, libwebp + Optional dependencies: lcms2, LibRaw, librsvg-2.0, xcursor, libheif, libtiff, ExifTool, resvg (unstable API, needs to be requested explicitly) diff --git a/fiv-io.c b/fiv-io.c index dcec86a..ddb8526 100644 --- a/fiv-io.c +++ b/fiv-io.c @@ -582,6 +582,9 @@ load_wuffs_frame(struct load_wuffs_frame_context *ctx, GError **error) return false; } + // TODO(p): Maybe pre-clear with + // wuffs_base__frame_config__background_color(&fc). + // Wuffs' test/data/animated-red-blue.gif, e.g., needs this handling. cairo_format_t decode_format = ctx->cairo_format; if (wuffs_base__frame_config__index(&fc) > 0 && @@ -785,7 +788,7 @@ open_wuffs(wuffs_base__image_decoder *dec, wuffs_base__io_buffer src, struct load_wuffs_frame_context ctx = { .dec = dec, .src = &src, .target = ioctx->screen_profile}; - // TODO(p): PNG text chunks (Wuffs #58). + // TODO(p): PNG text chunks, like we do with PNG thumbnails. // TODO(p): See if something could and should be done about // https://www.w3.org/TR/png-hdr-pq/ wuffs_base__image_decoder__set_report_metadata( @@ -969,6 +972,166 @@ open_wuffs_using(wuffs_base__image_decoder *(*allocate)(), return surface; } +// --- Wuffs for PNG thumbnails ------------------------------------------------ + +static bool +pull_metadata_kvp(wuffs_png__decoder *dec, wuffs_base__io_buffer *src, + GHashTable *texts, gchar **key, GError **error) +{ + wuffs_base__more_information minfo = {}; + GBytes *bytes = NULL; + if (!(bytes = pull_metadata( + wuffs_png__decoder__upcast_as__wuffs_base__image_decoder(dec), + src, &minfo, error))) + return false; + + switch (wuffs_base__more_information__metadata__fourcc(&minfo)) { + case WUFFS_BASE__FOURCC__KVPK: + g_assert(*key == NULL); + *key = g_strndup( + g_bytes_get_data(bytes, NULL), g_bytes_get_size(bytes)); + break; + case WUFFS_BASE__FOURCC__KVPV: + g_assert(*key != NULL); + g_hash_table_insert(texts, *key, g_strndup( + g_bytes_get_data(bytes, NULL), g_bytes_get_size(bytes))); + *key = NULL; + } + + g_bytes_unref(bytes); + return true; +} + +// An uncomplicated variant of fiv_io_open(), might be up for refactoring. +cairo_surface_t * +fiv_io_open_png_thumbnail(const char *path, GError **error) +{ + wuffs_png__decoder dec = {}; + wuffs_base__status status = wuffs_png__decoder__initialize( + &dec, sizeof dec, WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED); + if (!wuffs_base__status__is_ok(&status)) { + set_error(error, wuffs_base__status__message(&status)); + return NULL; + } + + gchar *data = NULL; + gsize len = 0; + if (!g_file_get_contents(path, &data, &len, error)) + return NULL; + + wuffs_base__io_buffer src = + wuffs_base__ptr_u8__reader((uint8_t *) data, len, TRUE); + wuffs_png__decoder__set_report_metadata( + &dec, WUFFS_BASE__FOURCC__KVP, true); + + wuffs_base__image_config cfg = {}; + wuffs_base__slice_u8 workbuf = {}; + cairo_surface_t *surface = NULL; + bool success = false; + + GHashTable *texts = + g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free); + gchar *key = NULL; + while (true) { + status = wuffs_png__decoder__decode_image_config(&dec, &cfg, &src); + if (wuffs_base__status__is_ok(&status)) + break; + + if (status.repr != wuffs_base__note__metadata_reported) { + set_error(error, wuffs_base__status__message(&status)); + goto fail; + } + if (!pull_metadata_kvp(&dec, &src, texts, &key, error)) + goto fail; + } + + g_assert(key == NULL); + + uint32_t width = wuffs_base__pixel_config__width(&cfg.pixcfg); + uint32_t height = wuffs_base__pixel_config__height(&cfg.pixcfg); + if (width > INT16_MAX || height > INT16_MAX) { + set_error(error, "image dimensions overflow"); + goto fail; + } + + wuffs_base__pixel_config__set(&cfg.pixcfg, + WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL, + WUFFS_BASE__PIXEL_SUBSAMPLING__NONE, width, height); + + uint64_t workbuf_len_max_incl = + wuffs_png__decoder__workbuf_len(&dec).max_incl; + if (workbuf_len_max_incl) { + workbuf = wuffs_base__malloc_slice_u8(malloc, workbuf_len_max_incl); + if (!workbuf.ptr) { + set_error(error, "failed to allocate a work buffer"); + goto fail; + } + } + + surface = cairo_image_surface_create( + wuffs_base__image_config__first_frame_is_opaque(&cfg) + ? CAIRO_FORMAT_RGB24 + : CAIRO_FORMAT_ARGB32, + width, height); + + cairo_status_t surface_status = cairo_surface_status(surface); + if (surface_status != CAIRO_STATUS_SUCCESS) { + set_error(error, cairo_status_to_string(surface_status)); + goto fail; + } + + wuffs_base__pixel_buffer pb = {}; + status = wuffs_base__pixel_buffer__set_from_slice(&pb, &cfg.pixcfg, + wuffs_base__make_slice_u8(cairo_image_surface_get_data(surface), + cairo_image_surface_get_stride(surface) * + cairo_image_surface_get_height(surface))); + if (!wuffs_base__status__is_ok(&status)) { + set_error(error, wuffs_base__status__message(&status)); + goto fail; + } + + status = wuffs_png__decoder__decode_frame(&dec, &pb, &src, + WUFFS_BASE__PIXEL_BLEND__SRC, workbuf, NULL); + if (!wuffs_base__status__is_ok(&status)) { + set_error(error, wuffs_base__status__message(&status)); + goto fail; + } + + // The specification does not say where the required metadata should be, + // it could very well be broken up into two parts. + wuffs_base__frame_config fc = {}; + while (true) { + // Not interested in APNG, might even throw an error in that case. + status = wuffs_png__decoder__decode_frame_config(&dec, &fc, &src); + if (status.repr == wuffs_base__note__end_of_data || + wuffs_base__status__is_ok(&status)) + break; + + if (status.repr != wuffs_base__note__metadata_reported) { + set_error(error, wuffs_base__status__message(&status)); + goto fail; + } + if (!pull_metadata_kvp(&dec, &src, texts, &key, error)) + goto fail; + } + + g_assert(key == NULL); + + cairo_surface_mark_dirty(surface); + cairo_surface_set_user_data(surface, &fiv_io_key_text, + g_hash_table_ref(texts), (cairo_destroy_func_t) g_hash_table_unref); + success = true; + +fail: + if (!success) + g_clear_pointer(&surface, cairo_surface_destroy); + + free(workbuf.ptr); + g_free(data); + g_hash_table_unref(texts); + return surface; +} + // --- JPEG -------------------------------------------------------------------- static GBytes * @@ -2555,6 +2718,7 @@ cairo_user_data_key_t fiv_io_key_orientation; cairo_user_data_key_t fiv_io_key_icc; cairo_user_data_key_t fiv_io_key_xmp; cairo_user_data_key_t fiv_io_key_thum; +cairo_user_data_key_t fiv_io_key_text; cairo_user_data_key_t fiv_io_key_frame_next; cairo_user_data_key_t fiv_io_key_frame_previous; diff --git a/fiv-io.h b/fiv-io.h index 5a3ba27..3d5aca6 100644 --- a/fiv-io.h +++ b/fiv-io.h @@ -53,6 +53,9 @@ extern cairo_user_data_key_t fiv_io_key_icc; extern cairo_user_data_key_t fiv_io_key_xmp; /// GBytes with a WebP's THUM chunk, used for our thumbnails. extern cairo_user_data_key_t fiv_io_key_thum; +/// GHashTable with key-value pairs from PNG's tEXt, zTXt, iTXt chunks. +/// Currently only read by fiv_io_open_png_thumbnail(). +extern cairo_user_data_key_t fiv_io_key_text; /// The next frame in a sequence, as a surface, in a chain, pre-composited. /// There is no wrap-around. @@ -95,6 +98,7 @@ typedef struct { cairo_surface_t *fiv_io_open(const FivIoOpenContext *ctx, GError **error); cairo_surface_t *fiv_io_open_from_data( const char *data, size_t len, const FivIoOpenContext *ctx, GError **error); +cairo_surface_t *fiv_io_open_png_thumbnail(const char *path, GError **error); // --- Thumbnail passing utilities --------------------------------------------- diff --git a/fiv-thumbnail.c b/fiv-thumbnail.c index 44f2735..c6e1896 100644 --- a/fiv-thumbnail.c +++ b/fiv-thumbnail.c @@ -18,7 +18,6 @@ #include "config.h" #include -#include #include #include #include @@ -446,138 +445,33 @@ read_wide_thumbnail( // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -static int // tri-state -check_spng_thumbnail_texts(struct spng_text *texts, uint32_t texts_len, - const gchar *target, time_t mtime) -{ - // May contain Thumb::Image::Width Thumb::Image::Height, - // but those aren't interesting currently (would be for fast previews). - bool need_uri = true, need_mtime = true; - for (uint32_t i = 0; i < texts_len; i++) { - struct spng_text *text = texts + i; - if (!strcmp(text->keyword, THUMB_URI)) { - need_uri = false; - if (strcmp(target, text->text)) - return false; - } - if (!strcmp(text->keyword, THUMB_MTIME)) { - need_mtime = false; - if (atol(text->text) != mtime) - return false; - } - } - return need_uri || need_mtime ? -1 : true; -} - -static int // tri-state -check_spng_thumbnail(spng_ctx *ctx, const gchar *target, time_t mtime, int *err) -{ - uint32_t texts_len = 0; - if ((*err = spng_get_text(ctx, NULL, &texts_len))) - return false; - - int result = false; - struct spng_text *texts = g_malloc0_n(texts_len, sizeof *texts); - if (!(*err = spng_get_text(ctx, texts, &texts_len))) - result = check_spng_thumbnail_texts(texts, texts_len, target, mtime); - g_free(texts); - return result; -} - static cairo_surface_t * -read_spng_thumbnail( +read_png_thumbnail( const gchar *path, const gchar *uri, time_t mtime, GError **error) { - FILE *fp; - cairo_surface_t *result = NULL; - if (!(fp = fopen(path, "rb"))) { - set_error(error, g_strerror(errno)); + cairo_surface_t *surface = fiv_io_open_png_thumbnail(path, error); + if (!surface) + return NULL; + + GHashTable *texts = cairo_surface_get_user_data(surface, &fiv_io_key_text); + if (!texts) { + set_error(error, "not a thumbnail"); + cairo_surface_destroy(surface); return NULL; } - errno = 0; - spng_ctx *ctx = spng_ctx_new(0); - if (!ctx) { - set_error(error, g_strerror(errno)); - goto fail_init; - } - - int err; - size_t size = 0; - if ((err = spng_set_png_file(ctx, fp)) || - (err = spng_set_image_limits(ctx, INT16_MAX, INT16_MAX)) || - (err = spng_decoded_image_size(ctx, SPNG_FMT_RGBA8, &size))) { - set_error(error, spng_strerror(err)); - goto fail; - } - if (check_spng_thumbnail(ctx, uri, mtime, &err) == false) { - set_error(error, err ? spng_strerror(err) : "mismatch"); - goto fail; - } - - struct spng_ihdr ihdr = {}; - struct spng_trns trns = {}; - spng_get_ihdr(ctx, &ihdr); - bool may_be_translucent = !spng_get_trns(ctx, &trns) || - ihdr.color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA || - ihdr.color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA; - - cairo_surface_t *surface = cairo_image_surface_create( - may_be_translucent ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, - ihdr.width, ihdr.height); - - cairo_status_t surface_status = cairo_surface_status(surface); - if (surface_status != CAIRO_STATUS_SUCCESS) { - set_error(error, cairo_status_to_string(surface_status)); - goto fail_data; - } - - uint32_t *data = (uint32_t *) cairo_image_surface_get_data(surface); - g_assert((size_t) cairo_image_surface_get_stride(surface) * - cairo_image_surface_get_height(surface) == size); - - cairo_surface_flush(surface); - if ((err = spng_decode_image(ctx, data, size, SPNG_FMT_RGBA8, - SPNG_DECODE_TRNS | SPNG_DECODE_GAMMA))) { - set_error(error, spng_strerror(err)); - goto fail_data; - } - - // The specification does not say where the required metadata should be, - // it could very well be broken up into two parts. - if (check_spng_thumbnail(ctx, uri, mtime, &err) != true) { - set_error( - error, err ? spng_strerror(err) : "mismatch or not a thumbnail"); - goto fail_data; - } - - // pixman can be mildly abused to do this operation, but it won't be faster. - if (may_be_translucent) { - for (size_t i = size / sizeof *data; i--; ) { - const uint8_t *unit = (const uint8_t *) &data[i]; - uint32_t a = unit[3], - b = PREMULTIPLY8(a, unit[2]), - g = PREMULTIPLY8(a, unit[1]), - r = PREMULTIPLY8(a, unit[0]); - data[i] = a << 24 | r << 16 | g << 8 | b; - } - } else { - for (size_t i = size / sizeof *data; i--; ) { - uint32_t rgba = g_ntohl(data[i]); - data[i] = rgba << 24 | rgba >> 8; - } - } - - cairo_surface_mark_dirty((result = surface)); - -fail_data: - if (!result) + // May contain Thumb::Image::Width Thumb::Image::Height, + // but those aren't interesting currently (would be for fast previews). + const char *text_uri = g_hash_table_lookup(texts, THUMB_URI); + const char *text_mtime = g_hash_table_lookup(texts, THUMB_MTIME); + if (!text_uri || strcmp(text_uri, uri) || + !text_mtime || atol(text_mtime) != mtime) { + set_error(error, "mismatch or not a thumbnail"); cairo_surface_destroy(surface); -fail: - spng_ctx_free(ctx); -fail_init: - fclose(fp); - return result; + return NULL; + } + + return surface; } cairo_surface_t * @@ -616,7 +510,7 @@ fiv_thumbnail_lookup(char *uri, gint64 mtime_msec, FivThumbnailSize size) gchar *path = g_strdup_printf("%s/%s/%s.png", thumbnails_dir, name, sum); - result = read_spng_thumbnail(path, uri, mtime_msec / 1000, &error); + result = read_png_thumbnail(path, uri, mtime_msec / 1000, &error); if (error) { g_debug("%s: %s", path, error->message); g_clear_error(&error); diff --git a/meson.build b/meson.build index 38afe47..b885e2e 100644 --- a/meson.build +++ b/meson.build @@ -39,11 +39,6 @@ dependencies = [ dependency('libwebpdemux'), dependency('libwebpdecoder', required : false), dependency('libwebpmux'), - # https://github.com/google/wuffs/issues/58 - dependency('spng', version : '>=0.7.0', - default_options: 'default_library=static', - # fallback : ['spng', 'spng_dep'], - ), lcms2, libjpegqs, diff --git a/subprojects/spng.wrap b/subprojects/spng.wrap deleted file mode 100644 index 93904f2..0000000 --- a/subprojects/spng.wrap +++ /dev/null @@ -1,8 +0,0 @@ -[wrap-file] -directory = libspng-0.7.2 -source_url = https://github.com/randy408/libspng/archive/refs/tags/v0.7.2.tar.gz -source_filename = libspng-0.7.2.tar.gz -source_hash = 4acf25571d31f540d0b7ee004f5461d68158e0a13182505376805da99f4ccc4e - -[provide] -spng = spng_dep