Finish WebP support with animations
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A0420B94F92B9493
185
fastiv-io.c
185
fastiv-io.c
@ -86,6 +86,9 @@ 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_LIBWEBP
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"image/webp",
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#endif // HAVE_LIBWEBP
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#ifdef HAVE_LIBHEIF
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"image/heic",
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"image/heif",
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@ -1116,6 +1119,134 @@ open_xcursor(const gchar *data, gsize len, GError **error)
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#endif // HAVE_XCURSOR --------------------------------------------------------
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#ifdef HAVE_LIBWEBP //---------------------------------------------------------
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static cairo_surface_t *
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load_libwebp_nonanimated(
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WebPDecoderConfig *config, const WebPData *wd, GError **error)
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{
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cairo_surface_t *surface = cairo_image_surface_create(
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config->input.has_alpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
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config->input.width, config->input.height);
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cairo_status_t surface_status = cairo_surface_status(surface);
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if (surface_status != CAIRO_STATUS_SUCCESS) {
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set_error(error, cairo_status_to_string(surface_status));
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cairo_surface_destroy(surface);
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return NULL;
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}
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config->options.use_threads = true;
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config->output.width = config->input.width;
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config->output.height = config->input.height;
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config->output.is_external_memory = true;
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config->output.u.RGBA.rgba = cairo_image_surface_get_data(surface);
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config->output.u.RGBA.stride = cairo_image_surface_get_stride(surface);
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config->output.u.RGBA.size =
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config->output.u.RGBA.stride * cairo_image_surface_get_height(surface);
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if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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config->output.colorspace = MODE_bgrA;
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else
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config->output.colorspace = MODE_Argb;
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VP8StatusCode err = 0;
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if ((err = WebPDecode(wd->bytes, wd->size, config))) {
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set_error(error, "WebP decoding error");
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cairo_surface_destroy(surface);
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return NULL;
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}
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cairo_surface_mark_dirty(surface);
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return surface;
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}
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static cairo_surface_t *
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load_libwebp_frame(WebPAnimDecoder *dec, const WebPAnimInfo *info,
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int *last_timestamp, GError **error)
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{
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uint8_t *buf = NULL;
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int timestamp = 0;
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if (!WebPAnimDecoderGetNext(dec, &buf, ×tamp)) {
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set_error(error, "WebP decoding error");
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return NULL;
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}
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bool is_opaque = (info->bgcolor & 0xFF) == 0xFF;
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uint64_t area = info->canvas_width * info->canvas_height;
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cairo_surface_t *surface = cairo_image_surface_create(
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is_opaque ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32,
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info->canvas_width, info->canvas_height);
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cairo_status_t surface_status = cairo_surface_status(surface);
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if (surface_status != CAIRO_STATUS_SUCCESS) {
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set_error(error, cairo_status_to_string(surface_status));
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cairo_surface_destroy(surface);
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return NULL;
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}
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uint32_t *dst = (uint32_t *) cairo_image_surface_get_data(surface);
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if (G_BYTE_ORDER == G_LITTLE_ENDIAN) {
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memcpy(dst, buf, area * sizeof *dst);
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} else {
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uint32_t *src = (uint32_t *) buf;
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for (uint64_t i = 0; i < area; i++)
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*dst++ = GUINT32_FROM_LE(*src++);
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}
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cairo_surface_mark_dirty(surface);
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// This API is confusing and awkward.
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cairo_surface_set_user_data(surface, &fastiv_io_key_frame_duration,
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(void *) (intptr_t) (timestamp - *last_timestamp), NULL);
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*last_timestamp = timestamp;
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return surface;
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}
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static cairo_surface_t *
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load_libwebp_animated(const WebPData *wd, GError **error)
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{
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WebPAnimDecoderOptions options = {};
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WebPAnimDecoderOptionsInit(&options);
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options.use_threads = true;
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options.color_mode = MODE_bgrA;
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WebPAnimInfo info = {};
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WebPAnimDecoder *dec = WebPAnimDecoderNew(wd, &options);
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WebPAnimDecoderGetInfo(dec, &info);
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int last_timestamp = 0;
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cairo_surface_t *frames = NULL, *frames_tail = NULL;
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while (WebPAnimDecoderHasMoreFrames(dec)) {
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cairo_surface_t *surface =
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load_libwebp_frame(dec, &info, &last_timestamp, error);
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if (!surface) {
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g_clear_pointer(&frames, cairo_surface_destroy);
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goto fail;
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}
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if (frames_tail)
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cairo_surface_set_user_data(frames_tail,
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&fastiv_io_key_frame_next, surface,
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(cairo_destroy_func_t) cairo_surface_destroy);
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else
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frames = surface;
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cairo_surface_set_user_data(surface,
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&fastiv_io_key_frame_previous, frames_tail, NULL);
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frames_tail = surface;
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}
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if (frames) {
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cairo_surface_set_user_data(frames, &fastiv_io_key_frame_previous,
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frames_tail, NULL);
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} else {
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set_error(error, "the animation has no frames");
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g_clear_pointer(&frames, cairo_surface_destroy);
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}
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fail:
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WebPAnimDecoderDelete(dec);
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return frames;
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}
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static cairo_surface_t *
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open_libwebp(const gchar *data, gsize len, const gchar *path, GError **error)
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{
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@ -1128,75 +1259,49 @@ open_libwebp(const gchar *data, gsize len, const gchar *path, GError **error)
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// TODO(p): Differentiate between a bad WebP, and not a WebP.
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VP8StatusCode err = 0;
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if ((err = WebPGetFeatures((const uint8_t *) data, len, &config.input))) {
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WebPData wd = {.bytes = (const uint8_t *) data, .size = len};
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if ((err = WebPGetFeatures(wd.bytes, wd.size, &config.input))) {
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set_error(error, "WebP decoding error");
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return NULL;
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}
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// TODO(p): Support animations through WebPAnimDecoder (has_animation).
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cairo_surface_t *result = NULL;
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cairo_surface_t *surface = cairo_image_surface_create(
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config.input.has_alpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
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config.input.width, config.input.height);
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cairo_status_t surface_status = cairo_surface_status(surface);
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if (surface_status != CAIRO_STATUS_SUCCESS) {
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set_error(error, cairo_status_to_string(surface_status));
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cairo_surface_t *result = config.input.has_animation
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? load_libwebp_animated(&wd, error)
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: load_libwebp_nonanimated(&config, &wd, error);
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if (!result)
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goto fail;
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}
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config.options.use_threads = true;
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config.output.width = config.input.width;
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config.output.height = config.input.height;
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config.output.is_external_memory = true;
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config.output.u.RGBA.rgba = cairo_image_surface_get_data(surface);
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config.output.u.RGBA.stride = cairo_image_surface_get_stride(surface);
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config.output.u.RGBA.size =
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config.output.u.RGBA.stride * cairo_image_surface_get_height(surface);
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if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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config.output.colorspace = MODE_bgrA;
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else
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config.output.colorspace = MODE_Argb;
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if ((err = WebPDecode((const uint8_t *) data, len, &config))) {
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set_error(error, "WebP decoding error");
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goto fail;
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}
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// Of course everything has to use a different abstraction.
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WebPData wd = {.bytes = (const uint8_t *) data, .size = len};
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WebPDemuxer *demux = WebPDemux(&wd);
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if (!demux) {
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g_warning("%s: %s", path, "demux failure");
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goto fail_demux;
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goto fail;
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}
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uint32_t flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS);
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WebPChunkIterator chunk_iter;
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if ((flags & ICCP_FLAG) &&
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WebPDemuxGetChunk(demux, "ICCP", 1, &chunk_iter)) {
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cairo_surface_set_user_data(surface, &fastiv_io_key_icc,
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cairo_surface_set_user_data(result, &fastiv_io_key_icc,
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g_bytes_new(chunk_iter.chunk.bytes, chunk_iter.chunk.size),
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(cairo_destroy_func_t) g_bytes_unref);
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}
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if ((flags & EXIF_FLAG) &&
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WebPDemuxGetChunk(demux, "EXIF", 1, &chunk_iter)) {
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cairo_surface_set_user_data(surface, &fastiv_io_key_exif,
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cairo_surface_set_user_data(result, &fastiv_io_key_exif,
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g_bytes_new(chunk_iter.chunk.bytes, chunk_iter.chunk.size),
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(cairo_destroy_func_t) g_bytes_unref);
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}
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if (flags & ANIMATION_FLAG) {
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cairo_surface_set_user_data(result, &fastiv_io_key_loops,
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(void *) (uintptr_t) WebPDemuxGetI(demux, WEBP_FF_LOOP_COUNT),
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NULL);
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}
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WebPDemuxReleaseChunkIterator(&chunk_iter);
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WebPDemuxDelete(demux);
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fail_demux:
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result = surface;
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fail:
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if (!result)
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cairo_surface_destroy(surface);
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WebPFreeDecBuffer(&config.output);
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return result;
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}
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@ -473,6 +473,8 @@ advance_animation(FastivView *self, GdkFrameClock *clock)
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return FALSE;
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// Do not busy loop. GIF timings are given in hundredths of a second.
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// Note that browsers seem to do [< 10] => 100:
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// https://bugs.webkit.org/show_bug.cgi?id=36082
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if (duration == 0)
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duration = gdk_frame_timings_get_refresh_interval(
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gdk_frame_clock_get_current_timings(clock)) / 1000;
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