Initial checkin of Pika from heckimp
This commit is contained in:
235
modules/display-filter-aces-rrt.c
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235
modules/display-filter-aces-rrt.c
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 2018 Øyvind Kolås <pippin@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikacolor/pikacolor.h"
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#include "libpikaconfig/pikaconfig.h"
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#include "libpikamath/pikamath.h"
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#include "libpikamodule/pikamodule.h"
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#include "libpikawidgets/pikawidgets.h"
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#include "libpika/libpika-intl.h"
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#define DEFAULT_EXPOSURE 0.0
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#define CDISPLAY_TYPE_ACES_RRT (cdisplay_aces_rrt_get_type ())
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#define CDISPLAY_ACES_RRT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CDISPLAY_TYPE_ACES_RRT, CdisplayAcesRRT))
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#define CDISPLAY_ACES_RRT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CDISPLAY_TYPE_ACES_RRT, CdisplayAcesRRTClass))
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#define CDISPLAY_IS_ACES_RRT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CDISPLAY_TYPE_ACES_RRT))
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#define CDISPLAY_IS_ACES_RRT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CDISPLAY_TYPE_ACES_RRT))
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typedef struct _CdisplayAcesRRT CdisplayAcesRRT;
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typedef struct _CdisplayAcesRRTClass CdisplayAcesRRTClass;
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struct _CdisplayAcesRRT
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{
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PikaColorDisplay parent_instance;
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gdouble exposure;
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};
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struct _CdisplayAcesRRTClass
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{
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PikaColorDisplayClass parent_instance;
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};
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enum
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{
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PROP_0,
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PROP_EXPOSURE
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};
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GType cdisplay_aces_rrt_get_type (void);
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static void cdisplay_aces_rrt_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void cdisplay_aces_rrt_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void cdisplay_aces_rrt_convert_buffer (PikaColorDisplay *display,
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GeglBuffer *buffer,
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GeglRectangle *area);
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static void cdisplay_aces_rrt_set_exposure (CdisplayAcesRRT *aces_rrt,
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gdouble value);
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static const PikaModuleInfo cdisplay_aces_rrt_info =
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{
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PIKA_MODULE_ABI_VERSION,
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N_("ACES RRT (RRT = Reference Rendering Transform). An HDR to SDR proof color display filter, using a luminance-only approximation of the ACES RRT, a pre-defined filmic look to be used before ODT (display or output space ICC profile)"),
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"Øyvind Kolås <pippin@gimp.org>",
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"v0.1",
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"(c) 2018, released under the LGPLv2+",
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"July 17, 2018"
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};
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G_DEFINE_DYNAMIC_TYPE (CdisplayAcesRRT, cdisplay_aces_rrt,
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PIKA_TYPE_COLOR_DISPLAY)
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G_MODULE_EXPORT const PikaModuleInfo *
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pika_module_query (GTypeModule *module)
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{
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return &cdisplay_aces_rrt_info;
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}
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G_MODULE_EXPORT gboolean
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pika_module_register (GTypeModule *module)
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{
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cdisplay_aces_rrt_register_type (module);
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return TRUE;
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}
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static void
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cdisplay_aces_rrt_class_init (CdisplayAcesRRTClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaColorDisplayClass *display_class = PIKA_COLOR_DISPLAY_CLASS (klass);
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object_class->get_property = cdisplay_aces_rrt_get_property;
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object_class->set_property = cdisplay_aces_rrt_set_property;
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PIKA_CONFIG_PROP_DOUBLE (object_class, PROP_EXPOSURE,
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"exposure",
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_("Pre-transform change in stops"),
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NULL,
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-10.0, 10.0, DEFAULT_EXPOSURE,
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1);
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display_class->name = _("Aces RRT");
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display_class->help_id = "pika-colordisplay-aces-rrt";
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display_class->icon_name = PIKA_ICON_DISPLAY_FILTER_GAMMA;
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display_class->convert_buffer = cdisplay_aces_rrt_convert_buffer;
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}
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static void
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cdisplay_aces_rrt_class_finalize (CdisplayAcesRRTClass *klass)
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{
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}
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static void
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cdisplay_aces_rrt_init (CdisplayAcesRRT *aces_rrt)
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{
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}
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static void
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cdisplay_aces_rrt_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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CdisplayAcesRRT *aces_rrt = CDISPLAY_ACES_RRT (object);
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switch (property_id)
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{
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case PROP_EXPOSURE:
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g_value_set_double (value, aces_rrt->exposure);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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cdisplay_aces_rrt_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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CdisplayAcesRRT *aces_rrt = CDISPLAY_ACES_RRT (object);
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switch (property_id)
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{
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case PROP_EXPOSURE:
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cdisplay_aces_rrt_set_exposure (aces_rrt, g_value_get_double (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static inline float aces_aces_rrt (float x)
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{
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/*
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Approximation of the ACES aces_rrt HDR to SDR mapping from:
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https://github.com/TheRealMJP/BakingLab/blob/master/BakingLab/ACES.hlsl
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*/
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float a = x * (x + 0.0245786f) - 0.000090537f;
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float b = x * (0.983729f * x + 0.4329510f) + 0.238081f;
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return a / b;
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}
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static void
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cdisplay_aces_rrt_convert_buffer (PikaColorDisplay *display,
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GeglBuffer *buffer,
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GeglRectangle *area)
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{
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CdisplayAcesRRT *filter = CDISPLAY_ACES_RRT (display);
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GeglBufferIterator *iter;
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float gain = 1.0f / exp2f(-filter->exposure);
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iter = gegl_buffer_iterator_new (buffer, area, 0,
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babl_format ("RGBA float"),
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GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE, 1);
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while (gegl_buffer_iterator_next (iter))
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{
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gfloat *data = iter->items[0].data;
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gint count = iter->length;
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while (count--)
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{
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*data = aces_aces_rrt (*data * gain); data++;
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*data = aces_aces_rrt (*data * gain); data++;
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*data = aces_aces_rrt (*data * gain); data++;
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data++;
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}
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}
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}
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static void
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cdisplay_aces_rrt_set_exposure (CdisplayAcesRRT *aces_rrt,
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gdouble value)
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{
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if (value != aces_rrt->exposure)
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{
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aces_rrt->exposure = value;
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g_object_notify (G_OBJECT (aces_rrt), "exposure");
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pika_color_display_changed (PIKA_COLOR_DISPLAY (aces_rrt));
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}
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}
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