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Prepare for parallelized colour management

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This rewrite is more or less necessary for:
 - colour-managed browser thumbnails,
 - asynchronous image loading,
 - turning fiv-io into a reusable library.

Little CMS has a fairly terrible API in this regard.
This commit is contained in:
Přemysl Eric Janouch
2024-01-26 21:58:18 +01:00
parent 9acab00bcc
commit 604594a8f1
7 changed files with 412 additions and 301 deletions
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10
fiv-thumbnail.c
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@@ -137,10 +137,12 @@ might_be_a_thumbnail(const char *path_or_uri)
static FivIoImage *
render(GFile *target, GBytes *data, gboolean *color_managed, GError **error)
{
FivIoCmm *cmm = fiv_io_cmm_get_default();
FivIoOpenContext ctx = {
.uri = g_file_get_uri(target),
// Remember to synchronize changes with adjust_thumbnail().
.screen_profile = fiv_io_profile_new_sRGB(),
.cmm = cmm,
.screen_profile = fiv_io_cmm_get_profile_sRGB(cmm),
.screen_dpi = 96,
.first_frame_only = TRUE,
// Only using this array as a redirect.
@@ -182,9 +184,11 @@ adjust_thumbnail(FivIoImage *thumbnail, double row_height)
FivIoRenderClosure *closure = thumbnail->render;
if (closure && orientation <= FivIoOrientation0) {
// Remember to synchronize changes with render().
FivIoProfile *screen_profile = fiv_io_profile_new_sRGB();
FivIoCmm *cmm = fiv_io_cmm_get_default();
FivIoProfile *screen_profile = fiv_io_cmm_get_profile_sRGB(cmm);
// This API doesn't accept non-uniform scaling; prefer a vertical fit.
FivIoImage *scaled = closure->render(closure, screen_profile, scale_y);
FivIoImage *scaled =
closure->render(closure, cmm, screen_profile, scale_y);
if (screen_profile)
fiv_io_profile_free(screen_profile);
if (scaled)