fiv/fiv-io-profile.c

376 lines
9.8 KiB
C

//
// fiv-profile.c: colour management
//
// Copyright (c) 2024, Přemysl Eric Janouch <p@janouch.name>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#include "config.h"
#include <glib.h>
#include <stdbool.h>
#include "fiv-io.h"
// Colour management must be handled before RGB conversions.
#ifdef HAVE_LCMS2
#include <lcms2.h>
#endif // HAVE_LCMS2
#ifdef HAVE_LCMS2_FAST_FLOAT
#include <lcms2_fast_float.h>
#endif // HAVE_LCMS2_FAST_FLOAT
// https://github.com/mm2/Little-CMS/issues/430
static bool g_broken_cms_premul;
void
fiv_io_profile_init(void)
{
// TODO(p): Use Little CMS with contexts instead.
#ifdef HAVE_LCMS2_FAST_FLOAT
if (cmsPluginTHR(NULL, cmsFastFloatExtensions()))
g_broken_cms_premul = LCMS_VERSION <= 2160;
#endif // HAVE_LCMS2_FAST_FLOAT
}
FivIoProfile *
fiv_io_profile_new(const void *data, size_t len)
{
#ifdef HAVE_LCMS2
return cmsOpenProfileFromMemTHR(NULL, data, len);
#else
(void) data;
(void) len;
return NULL;
#endif
}
FivIoProfile *
fiv_io_profile_new_sRGB(void)
{
#ifdef HAVE_LCMS2
return cmsCreate_sRGBProfileTHR(NULL);
#else
return NULL;
#endif
}
FivIoProfile *
fiv_io_profile_new_parametric(
double gamma, double whitepoint[2], double primaries[6])
{
#ifdef HAVE_LCMS2
// TODO(p): Make sure to use the library in a thread-safe manner.
cmsContext context = NULL;
const cmsCIExyY cmsWP = {whitepoint[0], whitepoint[1], 1.0};
const cmsCIExyYTRIPLE cmsP = {
{primaries[0], primaries[1], 1.0},
{primaries[2], primaries[3], 1.0},
{primaries[4], primaries[5], 1.0},
};
cmsToneCurve *curve = cmsBuildGamma(context, gamma);
if (!curve)
return NULL;
cmsHPROFILE profile = cmsCreateRGBProfileTHR(
context, &cmsWP, &cmsP, (cmsToneCurve *[3]){curve, curve, curve});
cmsFreeToneCurve(curve);
return profile;
#else
(void) gamma;
(void) whitepoint;
(void) primaries;
return NULL;
#endif
}
FivIoProfile *
fiv_io_profile_new_sRGB_gamma(double gamma)
{
return fiv_io_profile_new_parametric(gamma,
(double[2]){0.3127, 0.3290},
(double[6]){0.6400, 0.3300, 0.3000, 0.6000, 0.1500, 0.0600});
}
FivIoProfile *
fiv_io_profile_new_from_bytes(GBytes *bytes)
{
gsize len = 0;
gconstpointer p = g_bytes_get_data(bytes, &len);
return fiv_io_profile_new(p, len);
}
GBytes *
fiv_io_profile_to_bytes(FivIoProfile *profile)
{
#ifdef HAVE_LCMS2
cmsUInt32Number len = 0;
(void) cmsSaveProfileToMem(profile, NULL, &len);
gchar *data = g_malloc0(len);
if (!cmsSaveProfileToMem(profile, data, &len)) {
g_free(data);
return NULL;
}
return g_bytes_new_take(data, len);
#else
(void) profile;
return NULL;
#endif
}
void
fiv_io_profile_free(FivIoProfile *self)
{
#ifdef HAVE_LCMS2
cmsCloseProfile(self);
#else
(void) self;
#endif
}
// --- Image loading -----------------------------------------------------------
// TODO(p): In general, try to use CAIRO_FORMAT_RGB30 or CAIRO_FORMAT_RGBA128F.
#ifndef HAVE_LCMS2
#define FIV_IO_PROFILE_ARGB32 0
#define FIV_IO_PROFILE_4X16LE 0
#else
#define FIV_IO_PROFILE_ARGB32 \
(G_BYTE_ORDER == G_LITTLE_ENDIAN ? TYPE_BGRA_8 : TYPE_ARGB_8)
#define FIV_IO_PROFILE_4X16LE \
(G_BYTE_ORDER == G_LITTLE_ENDIAN ? TYPE_BGRA_16 : TYPE_BGRA_16_SE)
#endif
// CAIRO_STRIDE_ALIGNMENT is 4 bytes, so there will be no padding with
// ARGB/BGRA/XRGB/BGRX.
static void
trivial_cmyk_to_host_byte_order_argb(unsigned char *p, int len)
{
// This CMYK handling has been seen in gdk-pixbuf/JPEG, GIMP/JPEG, skcms.
// It will typically produce horribly oversaturated results.
// Assume that all YCCK/CMYK JPEG files use inverted CMYK, as Photoshop
// does, see https://bugzilla.gnome.org/show_bug.cgi?id=618096
while (len--) {
int c = p[0], m = p[1], y = p[2], k = p[3];
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
p[0] = k * y / 255;
p[1] = k * m / 255;
p[2] = k * c / 255;
p[3] = 255;
#else
p[3] = k * y / 255;
p[2] = k * m / 255;
p[1] = k * c / 255;
p[0] = 255;
#endif
p += 4;
}
}
void
fiv_io_profile_cmyk(
FivIoImage *image, FivIoProfile *source, FivIoProfile *target)
{
#ifndef HAVE_LCMS2
(void) source;
(void) target;
#else
cmsHTRANSFORM transform = NULL;
if (source && target) {
transform = cmsCreateTransformTHR(NULL, source, TYPE_CMYK_8_REV, target,
FIV_IO_PROFILE_ARGB32, INTENT_PERCEPTUAL, 0);
}
if (transform) {
cmsDoTransform(
transform, image->data, image->data, image->width * image->height);
cmsDeleteTransform(transform);
return;
}
#endif
trivial_cmyk_to_host_byte_order_argb(
image->data, image->width * image->height);
}
static bool
fiv_io_profile_rgb_direct(unsigned char *data, int w, int h,
FivIoProfile *source, FivIoProfile *target,
uint32_t source_format, uint32_t target_format)
{
#ifndef HAVE_LCMS2
(void) data;
(void) w;
(void) h;
(void) source;
(void) source_format;
(void) target;
(void) target_format;
return false;
#else
// TODO(p): We should make this optional.
cmsHPROFILE src_fallback = NULL;
if (target && !source)
source = src_fallback = cmsCreate_sRGBProfileTHR(NULL);
cmsHTRANSFORM transform = NULL;
if (source && target) {
transform = cmsCreateTransformTHR(NULL,
source, source_format, target, target_format, INTENT_PERCEPTUAL, 0);
}
if (transform) {
cmsDoTransform(transform, data, data, w * h);
cmsDeleteTransform(transform);
}
if (src_fallback)
cmsCloseProfile(src_fallback);
return transform != NULL;
#endif
}
static void
fiv_io_profile_xrgb32(
FivIoImage *image, FivIoProfile *source, FivIoProfile *target)
{
fiv_io_profile_rgb_direct(image->data, image->width, image->height,
source, target, FIV_IO_PROFILE_ARGB32, FIV_IO_PROFILE_ARGB32);
}
void
fiv_io_profile_4x16le_direct(unsigned char *data,
int w, int h, FivIoProfile *source, FivIoProfile *target)
{
fiv_io_profile_rgb_direct(data, w, h, source, target,
FIV_IO_PROFILE_4X16LE, FIV_IO_PROFILE_4X16LE);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void
fiv_io_profile_page(FivIoImage *page, FivIoProfile *target,
void (*frame_cb) (FivIoImage *, FivIoProfile *, FivIoProfile *))
{
FivIoProfile *source = NULL;
if (page->icc)
source = fiv_io_profile_new_from_bytes(page->icc);
// TODO(p): All animations need to be composited in a linear colour space.
for (FivIoImage *frame = page; frame != NULL; frame = frame->frame_next)
frame_cb(frame, source, target);
if (source)
fiv_io_profile_free(source);
}
// From libwebp, verified to exactly match [x * a / 255].
#define PREMULTIPLY8(a, x) (((uint32_t) (x) * (uint32_t) (a) * 32897U) >> 23)
void
fiv_io_premultiply_argb32(FivIoImage *image)
{
if (image->format != CAIRO_FORMAT_ARGB32)
return;
for (uint32_t y = 0; y < image->height; y++) {
uint32_t *dstp = (uint32_t *) (image->data + image->stride * y);
for (uint32_t x = 0; x < image->width; x++) {
uint32_t argb = dstp[x], a = argb >> 24;
dstp[x] = a << 24 |
PREMULTIPLY8(a, 0xFF & (argb >> 16)) << 16 |
PREMULTIPLY8(a, 0xFF & (argb >> 8)) << 8 |
PREMULTIPLY8(a, 0xFF & argb);
}
}
}
#if defined HAVE_LCMS2 && LCMS_VERSION >= 2130
#define FIV_IO_PROFILE_ARGB32_PREMUL \
(G_BYTE_ORDER == G_LITTLE_ENDIAN ? TYPE_BGRA_8_PREMUL : TYPE_ARGB_8_PREMUL)
static void
fiv_io_profile_argb32(FivIoImage *image,
FivIoProfile *source, FivIoProfile *target)
{
g_return_if_fail(image->format == CAIRO_FORMAT_ARGB32);
// TODO: With g_no_cms_premultiplication,
// this probably also needs to be wrapped in un-premultiplication.
fiv_io_profile_rgb_direct(image->data, image->width, image->height,
source, target,
FIV_IO_PROFILE_ARGB32_PREMUL, FIV_IO_PROFILE_ARGB32_PREMUL);
}
void
fiv_io_profile_argb32_premultiply(
FivIoImage *image, FivIoProfile *source, FivIoProfile *target)
{
if (image->format != CAIRO_FORMAT_ARGB32) {
fiv_io_profile_xrgb32(image, source, target);
} else if (g_broken_cms_premul) {
fiv_io_profile_xrgb32(image, source, target);
fiv_io_premultiply_argb32(image);
} else if (!fiv_io_profile_rgb_direct(image->data,
image->width, image->height, source, target,
FIV_IO_PROFILE_ARGB32, FIV_IO_PROFILE_ARGB32_PREMUL)) {
g_debug("failed to create a premultiplying transform");
fiv_io_premultiply_argb32(image);
}
}
#else // ! HAVE_LCMS2 || LCMS_VERSION < 2130
// TODO(p): Unpremultiply, transform, repremultiply. Or require lcms2>=2.13.
#define fiv_io_profile_argb32(surface, source, target)
static void
fiv_io_profile_argb32_premultiply(
FivIoImage *image, FivIoProfile *source, FivIoProfile *target)
{
fiv_io_profile_xrgb32(image, source, target);
fiv_io_premultiply_argb32(image);
}
#endif // ! HAVE_LCMS2 || LCMS_VERSION < 2130
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void
fiv_io_profile_any(
FivIoImage *image, FivIoProfile *source, FivIoProfile *target)
{
// TODO(p): Ensure we do colour management early enough, so that
// no avoidable increase of quantization error occurs beforehands,
// and also for correct alpha compositing.
switch (image->format) {
break; case CAIRO_FORMAT_RGB24:
fiv_io_profile_xrgb32(image, source, target);
break; case CAIRO_FORMAT_ARGB32:
fiv_io_profile_argb32(image, source, target);
break; default:
g_debug("CM attempted on an unsupported surface format");
}
}
// TODO(p): Offer better integration, upgrade the bit depth if appropriate.
FivIoImage *
fiv_io_profile_finalize(FivIoImage *image, FivIoProfile *target)
{
if (!target)
return image;
for (FivIoImage *page = image; page != NULL; page = page->page_next)
fiv_io_profile_page(page, target, fiv_io_profile_any);
return image;
}