diff options
Diffstat (limited to 'fiv-io.c')
| -rw-r--r-- | fiv-io.c | 94 |
1 files changed, 92 insertions, 2 deletions
@@ -43,6 +43,9 @@ #ifdef HAVE_LIBRAW #include <libraw.h> #endif // HAVE_LIBRAW +#ifdef HAVE_RESVG +#include <resvg.h> +#endif // HAVE_RESVG #ifdef HAVE_LIBRSVG #include <librsvg/rsvg.h> #endif // HAVE_LIBRSVG @@ -92,9 +95,9 @@ const char *fiv_io_supported_media_types[] = { #ifdef HAVE_LIBRAW "image/x-dcraw", #endif // HAVE_LIBRAW -#ifdef HAVE_LIBRSVG +#if defined HAVE_RESVG || defined HAVE_LIBRSVG "image/svg+xml", -#endif // HAVE_LIBRSVG +#endif // HAVE_RESVG || HAVE_LIBRSVG #ifdef HAVE_XCURSOR "image/x-xcursor", #endif // HAVE_XCURSOR @@ -1320,6 +1323,85 @@ open_libraw(const gchar *data, gsize len, GError **error) } #endif // HAVE_LIBRAW --------------------------------------------------------- +#ifdef HAVE_RESVG // ---------------------------------------------------------- + +static const char * +load_resvg_error(int err) +{ + switch (err) { + case RESVG_ERROR_NOT_AN_UTF8_STR: + return "not a UTF-8 string"; + case RESVG_ERROR_FILE_OPEN_FAILED: + return "I/O failure"; + case RESVG_ERROR_MALFORMED_GZIP: + return "malformed gzip"; + case RESVG_ERROR_ELEMENTS_LIMIT_REACHED: + return "element limit reached"; + case RESVG_ERROR_INVALID_SIZE: + return "invalid or unspecified image size"; + case RESVG_ERROR_PARSING_FAILED: + return "parsing failed"; + default: + return "general failure"; + } +} + +static cairo_surface_t * +open_resvg(const gchar *data, gsize len, const gchar *uri, GError **error) +{ + GFile *file = g_file_new_for_uri(uri); + GFile *base_file = g_file_get_parent(file); + g_object_unref(file); + + resvg_options *opt = resvg_options_create(); + resvg_options_load_system_fonts(opt); + resvg_options_set_resources_dir(opt, g_file_peek_path(base_file)); + resvg_render_tree *tree = NULL; + int err = resvg_parse_tree_from_data(data, len, opt, &tree); + resvg_options_destroy(opt); + g_object_unref(base_file); + if (err != RESVG_OK) { + set_error(error, load_resvg_error(err)); + return NULL; + } + + // TODO(p): Support retrieving a scaled-up/down version. + // TODO(p): See if there is a situation for resvg_get_image_viewbox(). + resvg_size size = resvg_get_image_size(tree); + int w = ceil(size.width), h = ceil(size.height); + if (w > SHRT_MAX || h > SHRT_MAX) { + set_error(error, "image dimensions overflow"); + resvg_tree_destroy(tree); + return NULL; + } + + cairo_surface_t *surface = + cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h); + cairo_status_t surface_status = cairo_surface_status(surface); + if (surface_status != CAIRO_STATUS_SUCCESS) { + set_error(error, cairo_status_to_string(surface_status)); + cairo_surface_destroy(surface); + return NULL; + } + + uint32_t *pixels = (uint32_t *) cairo_image_surface_get_data(surface); + resvg_fit_to fit_to = { RESVG_FIT_TO_TYPE_ORIGINAL, 1. }; + resvg_render(tree, fit_to, resvg_transform_identity(), + cairo_image_surface_get_width(surface), + cairo_image_surface_get_height(surface), (char *) pixels); + resvg_tree_destroy(tree); + + // TODO(p): Also apply colour management, we'll need to un-premultiply. + for (int i = 0; i < w * h; i++) { + uint32_t rgba = g_ntohl(pixels[i]); + pixels[i] = rgba << 24 | rgba >> 8; + } + + cairo_surface_mark_dirty(surface); + return surface; +} + +#endif // HAVE_RESVG ---------------------------------------------------------- #ifdef HAVE_LIBRSVG // -------------------------------------------------------- #ifdef FIV_RSVG_DEBUG @@ -2391,6 +2473,14 @@ fiv_io_open_from_data(const char *data, size_t len, const gchar *uri, g_clear_error(error); } #endif // HAVE_LIBRAW --------------------------------------------------------- +#ifdef HAVE_RESVG // ---------------------------------------------------------- + if ((surface = open_resvg(data, len, uri, error))) + break; + if (error) { + g_debug("%s", (*error)->message); + g_clear_error(error); + } +#endif // HAVE_RESVG ---------------------------------------------------------- #ifdef HAVE_LIBRSVG // -------------------------------------------------------- if ((surface = open_librsvg(data, len, uri, error))) break; |