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gimp/libgimpcolor/gimpcolortransform.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimpcolortransform.c
* Copyright (C) 2014 Michael Natterer <mitch@gimp.org>
* Elle Stone <ellestone@ninedegreesbelow.com>
* Øyvind Kolås <pippin@gimp.org>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <lcms2.h>
#include <gio/gio.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpconfig/gimpconfig.h"
#include "gimpcolortypes.h"
#include "gimpcolorprofile.h"
#include "gimpcolortransform.h"
#include "libgimp/libgimp-intl.h"
/**
* SECTION: gimpcolortransform
* @title: GimpColorTransform
* @short_description: Definitions and Functions relating to LCMS.
*
* Definitions and Functions relating to LCMS.
**/
/**
* GimpColorTransform:
*
* Simply a typedef to #gpointer, but actually is a cmsHTRANSFORM. It's
* used in public GIMP APIs in order to avoid having to include LCMS
* headers.
**/
enum
{
PROGRESS,
LAST_SIGNAL
};
struct _GimpColorTransformPrivate
{
GimpColorProfile *src_profile;
const Babl *src_format;
const Babl *src_space_format;
GimpColorProfile *dest_profile;
const Babl *dest_format;
const Babl *dest_space_format;
cmsHTRANSFORM transform;
const Babl *fish;
};
static void gimp_color_transform_finalize (GObject *object);
G_DEFINE_TYPE (GimpColorTransform, gimp_color_transform,
G_TYPE_OBJECT);
#define parent_class gimp_color_transform_parent_class
static guint gimp_color_transform_signals[LAST_SIGNAL] = { 0 };
static gchar *lcms_last_error = NULL;
static void
lcms_error_clear (void)
{
if (lcms_last_error)
{
g_free (lcms_last_error);
lcms_last_error = NULL;
}
}
static void
lcms_error_handler (cmsContext ContextID,
cmsUInt32Number ErrorCode,
const gchar *text)
{
lcms_error_clear ();
lcms_last_error = g_strdup_printf ("lcms2 error %d: %s", ErrorCode, text);
}
static void
gimp_color_transform_class_init (GimpColorTransformClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gimp_color_transform_finalize;
gimp_color_transform_signals[PROGRESS] =
g_signal_new ("progress",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpColorTransformClass,
progress),
NULL, NULL,
g_cclosure_marshal_VOID__DOUBLE,
G_TYPE_NONE, 1,
G_TYPE_DOUBLE);
g_type_class_add_private (klass, sizeof (GimpColorTransformPrivate));
cmsSetLogErrorHandler (lcms_error_handler);
}
static void
gimp_color_transform_init (GimpColorTransform *transform)
{
transform->priv = G_TYPE_INSTANCE_GET_PRIVATE (transform,
GIMP_TYPE_COLOR_TRANSFORM,
GimpColorTransformPrivate);
}
static void
gimp_color_transform_finalize (GObject *object)
{
GimpColorTransform *transform = GIMP_COLOR_TRANSFORM (object);
g_clear_object (&transform->priv->src_profile);
g_clear_object (&transform->priv->dest_profile);
g_clear_pointer (&transform->priv->transform, cmsDeleteTransform);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gimp_color_transform_new:
* @src_profile: the source #GimpColorProfile
* @src_format: the source #Babl format
* @dest_profile: the destination #GimpColorProfile
* @dest_format: the destination #Babl format
* @rendering_intent: the rendering intent
* @flags: transform flags
*
* This function creates an color transform.
*
* Return value: the #GimpColorTransform, or %NULL if no transform is needed
* to convert between pixels of @src_profile and @dest_profile.
*
* Since: 2.10
**/
GimpColorTransform *
gimp_color_transform_new (GimpColorProfile *src_profile,
const Babl *src_format,
GimpColorProfile *dest_profile,
const Babl *dest_format,
GimpColorRenderingIntent rendering_intent,
GimpColorTransformFlags flags)
{
GimpColorTransform *transform;
GimpColorTransformPrivate *priv;
cmsHPROFILE src_lcms;
cmsHPROFILE dest_lcms;
cmsUInt32Number lcms_src_format;
cmsUInt32Number lcms_dest_format;
GError *error = NULL;
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (src_profile), NULL);
g_return_val_if_fail (src_format != NULL, NULL);
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (dest_profile), NULL);
g_return_val_if_fail (dest_format != NULL, NULL);
if (gimp_color_transform_can_gegl_copy (src_profile, dest_profile))
return NULL;
transform = g_object_new (GIMP_TYPE_COLOR_TRANSFORM, NULL);
priv = transform->priv;
priv->src_space_format = gimp_color_profile_get_format (src_profile,
src_format,
BABL_ICC_INTENT_RELATIVE_COLORIMETRIC,
&error);
if (! priv->src_space_format)
{
g_printerr ("%s: error making format: %s\n",
G_STRFUNC, error->message);
g_clear_error (&error);
}
priv->dest_space_format = gimp_color_profile_get_format (dest_profile,
dest_format,
rendering_intent,
&error);
if (! priv->dest_space_format)
{
g_printerr ("%s: error making format: %s\n",
G_STRFUNC, error->message);
g_clear_error (&error);
}
if (! g_getenv ("GIMP_COLOR_TRANSFORM_DISABLE_BABL") &&
priv->src_space_format && priv->dest_space_format)
{
priv->src_format = src_format;
priv->dest_format = dest_format;
priv->fish = babl_fish (priv->src_space_format,
priv->dest_space_format);
g_printerr ("%s: using babl for '%s' -> '%s'\n",
G_STRFUNC,
gimp_color_profile_get_label (src_profile),
gimp_color_profile_get_label (dest_profile));
return transform;
}
priv->src_space_format = NULL;
priv->dest_space_format = NULL;
priv->src_format = gimp_color_profile_get_lcms_format (src_format,
&lcms_src_format);
priv->dest_format = gimp_color_profile_get_lcms_format (dest_format,
&lcms_dest_format);
src_lcms = gimp_color_profile_get_lcms_profile (src_profile);
dest_lcms = gimp_color_profile_get_lcms_profile (dest_profile);
lcms_error_clear ();
priv->transform = cmsCreateTransform (src_lcms, lcms_src_format,
dest_lcms, lcms_dest_format,
rendering_intent,
flags |
cmsFLAGS_COPY_ALPHA);
if (lcms_last_error)
{
if (priv->transform)
{
cmsDeleteTransform (priv->transform);
priv->transform = NULL;
}
g_printerr ("%s\n", lcms_last_error);
}
if (! priv->transform)
{
g_object_unref (transform);
transform = NULL;
}
return transform;
}
/**
* gimp_color_transform_new_proofing:
* @src_profile: the source #GimpColorProfile
* @src_format: the source #Babl format
* @dest_profile: the destination #GimpColorProfile
* @dest_format: the destination #Babl format
* @proof_profile: the proof #GimpColorProfile
* @proof_intent: the proof intent
* @display_intent: the display intent
* @flags: transform flags
*
* This function creates a simulation / proofing color transform.
*
* Return value: the #GimpColorTransform, or %NULL.
*
* Since: 2.10
**/
GimpColorTransform *
gimp_color_transform_new_proofing (GimpColorProfile *src_profile,
const Babl *src_format,
GimpColorProfile *dest_profile,
const Babl *dest_format,
GimpColorProfile *proof_profile,
GimpColorRenderingIntent proof_intent,
GimpColorRenderingIntent display_intent,
GimpColorTransformFlags flags)
{
GimpColorTransform *transform;
GimpColorTransformPrivate *priv;
cmsHPROFILE src_lcms;
cmsHPROFILE dest_lcms;
cmsHPROFILE proof_lcms;
cmsUInt32Number lcms_src_format;
cmsUInt32Number lcms_dest_format;
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (src_profile), NULL);
g_return_val_if_fail (src_format != NULL, NULL);
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (dest_profile), NULL);
g_return_val_if_fail (dest_format != NULL, NULL);
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (proof_profile), NULL);
transform = g_object_new (GIMP_TYPE_COLOR_TRANSFORM, NULL);
priv = transform->priv;
src_lcms = gimp_color_profile_get_lcms_profile (src_profile);
dest_lcms = gimp_color_profile_get_lcms_profile (dest_profile);
proof_lcms = gimp_color_profile_get_lcms_profile (proof_profile);
priv->src_format = gimp_color_profile_get_lcms_format (src_format,
&lcms_src_format);
priv->dest_format = gimp_color_profile_get_lcms_format (dest_format,
&lcms_dest_format);
lcms_error_clear ();
priv->transform = cmsCreateProofingTransform (src_lcms, lcms_src_format,
dest_lcms, lcms_dest_format,
proof_lcms,
proof_intent,
display_intent,
flags |
cmsFLAGS_SOFTPROOFING |
cmsFLAGS_COPY_ALPHA);
if (lcms_last_error)
{
if (priv->transform)
{
cmsDeleteTransform (priv->transform);
priv->transform = NULL;
}
g_printerr ("%s\n", lcms_last_error);
}
if (! priv->transform)
{
g_object_unref (transform);
transform = NULL;
}
return transform;
}
/**
* gimp_color_transform_process_pixels:
* @transform: a #GimpColorTransform
* @src_format: #Babl format of @src_pixels
* @src_pixels: pointer to the source pixels
* @dest_format: #Babl format of @dest_pixels
* @dest_pixels: pointer to the destination pixels
* @length: number of pixels to process
*
* This function transforms a contiguous line of pixels.
*
* Since: 2.10
**/
void
gimp_color_transform_process_pixels (GimpColorTransform *transform,
const Babl *src_format,
gconstpointer src_pixels,
const Babl *dest_format,
gpointer dest_pixels,
gsize length)
{
GimpColorTransformPrivate *priv;
gpointer *src;
gpointer *dest;
g_return_if_fail (GIMP_IS_COLOR_TRANSFORM (transform));
g_return_if_fail (src_format != NULL);
g_return_if_fail (src_pixels != NULL);
g_return_if_fail (dest_format != NULL);
g_return_if_fail (dest_pixels != NULL);
priv = transform->priv;
if (src_format != priv->src_format)
{
src = g_malloc (length * babl_format_get_bytes_per_pixel (priv->src_format));
babl_process (babl_fish (src_format,
priv->src_format),
src_pixels, src, length);
}
else
{
src = (gpointer) src_pixels;
}
if (dest_format != priv->dest_format)
{
dest = g_malloc (length * babl_format_get_bytes_per_pixel (priv->dest_format));
}
else
{
dest = dest_pixels;
}
if (priv->transform)
{
cmsDoTransform (priv->transform, src, dest, length);
}
else
{
babl_process (priv->fish, src, dest, length);
}
if (src_format != priv->src_format)
{
g_free (src);
}
if (dest_format != priv->dest_format)
{
babl_process (babl_fish (priv->dest_format,
dest_format),
dest, dest_pixels, length);
g_free (dest);
}
}
/**
* gimp_color_transform_process_buffer:
* @transform: a #GimpColorTransform
* @src_buffer: source #GeglBuffer
* @src_rect: rectangle in @src_buffer
* @dest_buffer: destination #GeglBuffer
* @dest_rect: rectangle in @dest_buffer
*
* This function transforms buffer into another buffer.
*
* Since: 2.10
**/
void
gimp_color_transform_process_buffer (GimpColorTransform *transform,
GeglBuffer *src_buffer,
const GeglRectangle *src_rect,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect)
{
GimpColorTransformPrivate *priv;
GeglBufferIterator *iter;
gint total_pixels;
gint done_pixels = 0;
g_return_if_fail (GIMP_IS_COLOR_TRANSFORM (transform));
g_return_if_fail (GEGL_IS_BUFFER (src_buffer));
g_return_if_fail (GEGL_IS_BUFFER (dest_buffer));
priv = transform->priv;
if (src_rect)
{
total_pixels = src_rect->width * src_rect->height;
}
else
{
total_pixels = (gegl_buffer_get_width (src_buffer) *
gegl_buffer_get_height (src_buffer));
}
if (src_buffer != dest_buffer)
{
iter = gegl_buffer_iterator_new (src_buffer, src_rect, 0,
priv->src_format,
GEGL_ACCESS_READ,
GEGL_ABYSS_NONE);
gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0,
priv->dest_format,
GEGL_ACCESS_WRITE,
GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
if (priv->transform)
{
cmsDoTransform (priv->transform,
iter->data[0], iter->data[1], iter->length);
}
else
{
babl_process (priv->fish,
iter->data[0], iter->data[1], iter->length);
}
done_pixels += iter->roi[0].width * iter->roi[0].height;
g_signal_emit (transform, gimp_color_transform_signals[PROGRESS], 0,
(gdouble) done_pixels /
(gdouble) total_pixels);
}
}
else
{
iter = gegl_buffer_iterator_new (src_buffer, src_rect, 0,
priv->src_format,
GEGL_ACCESS_READWRITE,
GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
if (priv->transform)
{
cmsDoTransform (priv->transform,
iter->data[0], iter->data[0], iter->length);
}
else
{
babl_process (priv->fish,
iter->data[0], iter->data[0], iter->length);
}
done_pixels += iter->roi[0].width * iter->roi[0].height;
g_signal_emit (transform, gimp_color_transform_signals[PROGRESS], 0,
(gdouble) done_pixels /
(gdouble) total_pixels);
}
}
g_signal_emit (transform, gimp_color_transform_signals[PROGRESS], 0,
1.0);
}
/**
* gimp_color_transform_can_gegl_copy:
* @src_profile: source #GimpColorProfile
* @dest_profile: destination #GimpColorProfile
*
* This function checks if a GimpColorTransform is needed at all.
*
* Return value: %TRUE if pixels can be correctly converted between
* @src_profile and @dest_profile by simply using
* gegl_buffer_copy(), babl_process() or similar.
*
* Since: 2.10
**/
gboolean
gimp_color_transform_can_gegl_copy (GimpColorProfile *src_profile,
GimpColorProfile *dest_profile)
{
static GimpColorProfile *srgb_profile = NULL;
static GimpColorProfile *srgb_linear_profile = NULL;
static GimpColorProfile *gray_profile = NULL;
static GimpColorProfile *gray_linear_profile = NULL;
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (src_profile), FALSE);
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (dest_profile), FALSE);
if (gimp_color_profile_is_equal (src_profile, dest_profile))
return TRUE;
if (! srgb_profile)
{
srgb_profile = gimp_color_profile_new_rgb_srgb ();
srgb_linear_profile = gimp_color_profile_new_rgb_srgb_linear ();
gray_profile = gimp_color_profile_new_d65_gray_srgb_trc ();
gray_linear_profile = gimp_color_profile_new_d65_gray_linear ();
}
if ((gimp_color_profile_is_equal (src_profile, srgb_profile) ||
gimp_color_profile_is_equal (src_profile, srgb_linear_profile) ||
gimp_color_profile_is_equal (src_profile, gray_profile) ||
gimp_color_profile_is_equal (src_profile, gray_linear_profile))
&&
(gimp_color_profile_is_equal (dest_profile, srgb_profile) ||
gimp_color_profile_is_equal (dest_profile, srgb_linear_profile) ||
gimp_color_profile_is_equal (dest_profile, gray_profile) ||
gimp_color_profile_is_equal (dest_profile, gray_linear_profile)))
{
return TRUE;
}
return FALSE;
}
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