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Add flags to the serialization protocol

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It still needs no versioning, as it's not really used by anyone.

An alternative method of passing a "low-quality" flag would be
perusing fiv_thumbnail_key_lq from fiv-thumbnail.c, which would
create a circular dependency, unless fiv_io_{de,}serialize*()
were moved to fiv-thumbnail.c.
This commit is contained in:
Přemysl Eric Janouch 2022-06-06 15:22:23 +02:00
parent 4ca8825e02
commit 930744e165
Signed by: p
GPG Key ID: A0420B94F92B9493
3 changed files with 11 additions and 6 deletions
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7
fiv-io.c
View File

@ -2891,11 +2891,12 @@ fiv_io_open_from_data(
// --- Thumbnail passing utilities ---------------------------------------------
typedef struct {
guint64 user_data;
int width, height, stride, format;
} CairoHeader;
void
fiv_io_serialize_to_stdout(cairo_surface_t *surface)
fiv_io_serialize_to_stdout(cairo_surface_t *surface, guint64 user_data)
{
if (!surface || cairo_surface_get_type(surface) != CAIRO_SURFACE_TYPE_IMAGE)
return;
@ -2907,6 +2908,7 @@ fiv_io_serialize_to_stdout(cairo_surface_t *surface)
#endif
CairoHeader h = {
.user_data = user_data,
.width = cairo_image_surface_get_width(surface),
.height = cairo_image_surface_get_height(surface),
.stride = cairo_image_surface_get_stride(surface),
@ -2921,7 +2923,7 @@ fiv_io_serialize_to_stdout(cairo_surface_t *surface)
}
cairo_surface_t *
fiv_io_deserialize(GBytes *bytes)
fiv_io_deserialize(GBytes *bytes, guint64 *user_data)
{
CairoHeader h = {};
GByteArray *array = g_bytes_unref_to_array(bytes);
@ -2949,6 +2951,7 @@ fiv_io_deserialize(GBytes *bytes)
static cairo_user_data_key_t key;
cairo_surface_set_user_data(
surface, &key, array, (cairo_destroy_func_t) g_byte_array_unref);
*user_data = h.user_data;
return surface;
}

6
fiv-io.h
View File

@ -102,8 +102,10 @@ cairo_surface_t *fiv_io_open_png_thumbnail(const char *path, GError **error);
// --- Thumbnail passing utilities ---------------------------------------------
void fiv_io_serialize_to_stdout(cairo_surface_t *surface);
cairo_surface_t *fiv_io_deserialize(GBytes *bytes);
enum { FIV_IO_SERIALIZE_LOW_QUALITY = 1 << 0 };
void fiv_io_serialize_to_stdout(cairo_surface_t *surface, guint64 user_data);
cairo_surface_t *fiv_io_deserialize(GBytes *bytes, guint64 *user_data);
// --- Filesystem --------------------------------------------------------------

4
fiv-thumbnail.h
View File

@ -45,10 +45,10 @@ typedef struct _FivThumbnailSizeInfo {
const char *thumbnail_spec_name; ///< thumbnail-spec directory name
} FivThumbnailSizeInfo;
extern FivThumbnailSizeInfo fiv_thumbnail_sizes[FIV_THUMBNAIL_SIZE_COUNT];
enum { FIV_THUMBNAIL_WIDE_COEFFICIENT = 2 };
extern FivThumbnailSizeInfo fiv_thumbnail_sizes[FIV_THUMBNAIL_SIZE_COUNT];
/// If non-NULL, indicates a thumbnail of insufficient quality.
extern cairo_user_data_key_t fiv_thumbnail_key_lq;