diff options
Diffstat (limited to 'fastiv-io.c')
| -rw-r--r-- | fastiv-io.c | 98 |
1 files changed, 97 insertions, 1 deletions
diff --git a/fastiv-io.c b/fastiv-io.c index a450b73..14f4e3b 100644 --- a/fastiv-io.c +++ b/fastiv-io.c @@ -23,6 +23,9 @@ #ifdef HAVE_LIBRAW #include <libraw.h> #endif // HAVE_LIBRAW +#ifdef HAVE_LIBRSVG +#include <librsvg/rsvg.h> +#endif // HAVE_LIBRSVG #define WUFFS_IMPLEMENTATION #define WUFFS_CONFIG__MODULES @@ -38,6 +41,7 @@ #include "wuffs-mirror-release-c/release/c/wuffs-v0.3.c" #include "xdg.h" +#include "fastiv-io.h" // A subset of shared-mime-info that produces an appropriate list of // file extensions. Chiefly motivated by the suckiness of RAW images: @@ -50,6 +54,9 @@ const char *fastiv_io_supported_media_types[] = { #ifdef HAVE_LIBRAW "image/x-dcraw", #endif // HAVE_LIBRAW +#ifdef HAVE_LIBRSVG + "image/svg+xml", +#endif // HAVE_LIBRSVG NULL }; @@ -384,6 +391,81 @@ open_libraw(const gchar *data, gsize len, GError **error) } #endif // HAVE_LIBRAW --------------------------------------------------------- +#ifdef HAVE_LIBRSVG // -------------------------------------------------------- + +#ifdef FASTIV_RSVG_DEBUG +#include <cairo/cairo-script.h> +#include <cairo/cairo-svg.h> +#endif + +// FIXME: librsvg rasterizes filters, so this method isn't fully appropriate. +static cairo_surface_t * +open_librsvg(const gchar *data, gsize len, GError **error) +{ + RsvgHandle *handle = + rsvg_handle_new_from_data((const guint8 *) data, len, error); + if (!handle) + return NULL; + + // TODO(p): Acquire this from somewhere else. + rsvg_handle_set_dpi(handle, 96); + + double w = 0, h = 0; + if (!rsvg_handle_get_intrinsic_size_in_pixels(handle, &w, &h)) { + set_error(error, "cannot compute pixel dimensions"); + g_object_unref(handle); + return NULL; + } + + cairo_rectangle_t extents = { + .x = 0, .y = 0, .width = ceil(w), .height = ceil(h)}; + cairo_surface_t *surface = + cairo_recording_surface_create(CAIRO_CONTENT_COLOR_ALPHA, &extents); + +#ifdef FASTIV_RSVG_DEBUG + cairo_device_t *script = cairo_script_create("cairo.script"); + cairo_surface_t *tee = + cairo_script_surface_create_for_target(script, surface); + cairo_t *cr = cairo_create(tee); + cairo_device_destroy(script); + cairo_surface_destroy(tee); +#else + cairo_t *cr = cairo_create(surface); +#endif + + RsvgRectangle viewport = {.x = 0, .y = 0, .width = w, .height = h}; + if (!rsvg_handle_render_document(handle, cr, &viewport, error)) { + cairo_surface_destroy(surface); + cairo_destroy(cr); + g_object_unref(handle); + return NULL; + } + + cairo_destroy(cr); + g_object_unref(handle); + +#ifdef FASTIV_RSVG_DEBUG + cairo_surface_t *svg = cairo_svg_surface_create("cairo.svg", w, h); + cr = cairo_create(svg); + cairo_set_source_surface(cr, surface, 0, 0); + cairo_paint(cr); + cairo_destroy(cr); + cairo_surface_destroy(svg); + + cairo_surface_t *png = + cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w * 10, h * 10); + cr = cairo_create(png); + cairo_scale(cr, 10, 10); + cairo_set_source_surface(cr, surface, 0, 0); + cairo_paint(cr); + cairo_destroy(cr); + cairo_surface_write_to_png(png, "cairo.png"); + cairo_surface_destroy(png); +#endif + return surface; +} + +#endif // HAVE_LIBRSVG -------------------------------------------------------- cairo_surface_t * fastiv_io_open(const gchar *path, GError **error) @@ -399,6 +481,14 @@ fastiv_io_open(const gchar *path, GError **error) if (!g_file_get_contents(path, &data, &len, error)) return NULL; + cairo_surface_t *surface = fastiv_io_open_from_data(data, len, error); + free(data); + return surface; +} + +cairo_surface_t * +fastiv_io_open_from_data(const char *data, size_t len, GError **error) +{ wuffs_base__slice_u8 prefix = wuffs_base__make_slice_u8((uint8_t *) data, len); @@ -433,11 +523,17 @@ fastiv_io_open(const gchar *path, GError **error) // notably only continue with LIBRAW_FILE_UNSUPPORTED. g_clear_error(error); #endif // HAVE_LIBRAW --------------------------------------------------------- +#ifdef HAVE_LIBRSVG // -------------------------------------------------------- + if ((surface = open_librsvg(data, len, error))) + break; + + // XXX: It doesn't look like librsvg can return sensible errors. + g_clear_error(error); +#endif // HAVE_LIBRSVG -------------------------------------------------------- // TODO(p): Integrate gdk-pixbuf as a fallback (optional dependency). set_error(error, "unsupported file type"); } - free(data); return surface; } |