[gnome-settings-daemon] color: Stop applying color profiles

[Carlos Garnacho <carlosg src gnome org>]

commit 336a97ff1f55d9b42810d087a3af5ba4f1c8cf3f
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Dec 6 11:56:08 2021 +0100

    color: Stop applying color profiles
    
    This is now handled by mutter.

 plugins/color/gsd-color-state.c | 256 ----------------------------------------
 1 file changed, 256 deletions(-)
---
diff --git a/plugins/color/gsd-color-state.c b/plugins/color/gsd-color-state.c
index 1b153d09..75bb1ad6 100644
--- a/plugins/color/gsd-color-state.c
+++ b/plugins/color/gsd-color-state.c
@@ -73,12 +73,6 @@ G_DEFINE_TYPE (GsdColorState, gsd_color_state, G_TYPE_OBJECT)
 #define GCM_ICC_PROFILE_IN_X_VERSION_MAJOR      0
 #define GCM_ICC_PROFILE_IN_X_VERSION_MINOR      3
 
-typedef struct {
-        guint32          red;
-        guint32          green;
-        guint32          blue;
-} GnomeRROutputClutItem;
-
 GQuark
 gsd_color_state_error_quark (void)
 {
@@ -287,217 +281,6 @@ gcm_set_csc_matrix (GnomeRROutput *output,
         return gnome_rr_output_set_color_transform (output, ctm, error);
 }
 
-static GPtrArray *
-gcm_session_generate_vcgt (CdProfile *profile, guint color_temperature, guint size)
-{
-        GnomeRROutputClutItem *tmp;
-        GPtrArray *array = NULL;
-        const cmsToneCurve **vcgt;
-        cmsFloat32Number in;
-        guint i;
-        cmsHPROFILE lcms_profile;
-        CdIcc *icc = NULL;
-        CdColorRGB temp;
-
-        /* invalid size */
-        if (size == 0)
-                goto out;
-
-        /* open file */
-        icc = cd_profile_load_icc (profile, CD_ICC_LOAD_FLAGS_NONE, NULL, NULL);
-        if (icc == NULL)
-                goto out;
-
-        /* get tone curves from profile */
-        lcms_profile = cd_icc_get_handle (icc);
-        vcgt = cmsReadTag (lcms_profile, cmsSigVcgtTag);
-        if (vcgt == NULL || vcgt[0] == NULL) {
-                g_debug ("profile does not have any VCGT data");
-                goto out;
-        }
-
-        /* get the color temperature */
-        if (!cd_color_get_blackbody_rgb_full (color_temperature,
-                                              &temp,
-                                              CD_COLOR_BLACKBODY_FLAG_USE_PLANCKIAN)) {
-                g_warning ("failed to get blackbody for %uK", color_temperature);
-                cd_color_rgb_set (&temp, 1.0, 1.0, 1.0);
-        } else {
-                g_debug ("using VCGT gamma of %uK = %.1f,%.1f,%.1f",
-                         color_temperature, temp.R, temp.G, temp.B);
-        }
-
-        /* create array */
-        array = g_ptr_array_new_with_free_func (g_free);
-        for (i = 0; i < size; i++) {
-                in = (gdouble) i / (gdouble) (size - 1);
-                tmp = g_new0 (GnomeRROutputClutItem, 1);
-                tmp->red = cmsEvalToneCurveFloat(vcgt[0], in) * temp.R * (gdouble) 0xffff;
-                tmp->green = cmsEvalToneCurveFloat(vcgt[1], in) * temp.G * (gdouble) 0xffff;
-                tmp->blue = cmsEvalToneCurveFloat(vcgt[2], in) * temp.B * (gdouble) 0xffff;
-                g_ptr_array_add (array, tmp);
-        }
-out:
-        if (icc != NULL)
-                g_object_unref (icc);
-        return array;
-}
-
-static guint
-gnome_rr_output_get_gamma_size (GnomeRROutput *output)
-{
-        GnomeRRCrtc *crtc;
-        gint len = 0;
-
-        crtc = gnome_rr_output_get_crtc (output);
-        if (crtc == NULL)
-                return 0;
-        gnome_rr_crtc_get_gamma (crtc,
-                                 &len,
-                                 NULL, NULL, NULL);
-        return (guint) len;
-}
-
-static gboolean
-gcm_session_output_set_gamma (GnomeRROutput *output,
-                              GPtrArray *array,
-                              GError **error)
-{
-        gboolean ret = TRUE;
-        guint16 *red = NULL;
-        guint16 *green = NULL;
-        guint16 *blue = NULL;
-        guint i;
-        GnomeRROutputClutItem *data;
-        GnomeRRCrtc *crtc;
-
-        /* no length? */
-        if (array->len == 0) {
-                ret = FALSE;
-                g_set_error_literal (error,
-                                     GSD_COLOR_MANAGER_ERROR,
-                                     GSD_COLOR_MANAGER_ERROR_FAILED,
-                                     "no data in the CLUT array");
-                goto out;
-        }
-
-        /* convert to a type X understands */
-        red = g_new (guint16, array->len);
-        green = g_new (guint16, array->len);
-        blue = g_new (guint16, array->len);
-        for (i = 0; i < array->len; i++) {
-                data = g_ptr_array_index (array, i);
-                red[i] = data->red;
-                green[i] = data->green;
-                blue[i] = data->blue;
-        }
-
-        /* send to LUT */
-        crtc = gnome_rr_output_get_crtc (output);
-        if (crtc == NULL) {
-                ret = FALSE;
-                g_set_error (error,
-                             GSD_COLOR_MANAGER_ERROR,
-                             GSD_COLOR_MANAGER_ERROR_FAILED,
-                             "failed to get ctrc for %s",
-                             gnome_rr_output_get_name (output));
-                goto out;
-        }
-        gnome_rr_crtc_set_gamma (crtc, array->len,
-                                 red, green, blue);
-out:
-        g_free (red);
-        g_free (green);
-        g_free (blue);
-        return ret;
-}
-
-static gboolean
-gcm_session_device_set_gamma (GnomeRROutput *output,
-                              CdProfile *profile,
-                              guint color_temperature,
-                              GError **error)
-{
-        gboolean ret = FALSE;
-        guint size;
-        GPtrArray *clut = NULL;
-
-        /* create a lookup table */
-        size = gnome_rr_output_get_gamma_size (output);
-        if (size == 0) {
-                ret = TRUE;
-                goto out;
-        }
-        clut = gcm_session_generate_vcgt (profile, color_temperature, size);
-        if (clut == NULL) {
-                g_set_error_literal (error,
-                                     GSD_COLOR_MANAGER_ERROR,
-                                     GSD_COLOR_MANAGER_ERROR_FAILED,
-                                     "failed to generate vcgt");
-                goto out;
-        }
-
-        /* apply the vcgt to this output */
-        ret = gcm_session_output_set_gamma (output, clut, error);
-        if (!ret)
-                goto out;
-out:
-        if (clut != NULL)
-                g_ptr_array_unref (clut);
-        return ret;
-}
-
-static gboolean
-gcm_session_device_reset_gamma (GnomeRROutput *output,
-                                guint color_temperature,
-                                GError **error)
-{
-        gboolean ret;
-        guint i;
-        guint size;
-        guint32 value;
-        GPtrArray *clut;
-        GnomeRROutputClutItem *data;
-        CdColorRGB temp;
-
-        /* create a linear ramp */
-        g_debug ("falling back to dummy ramp");
-        clut = g_ptr_array_new_with_free_func (g_free);
-        size = gnome_rr_output_get_gamma_size (output);
-        if (size == 0) {
-                ret = TRUE;
-                goto out;
-        }
-
-        /* get the color temperature */
-        if (!cd_color_get_blackbody_rgb_full (color_temperature,
-                                              &temp,
-                                              CD_COLOR_BLACKBODY_FLAG_USE_PLANCKIAN)) {
-                g_warning ("failed to get blackbody for %uK", color_temperature);
-                cd_color_rgb_set (&temp, 1.0, 1.0, 1.0);
-        } else {
-                g_debug ("using reset gamma of %uK = %.1f,%.1f,%.1f",
-                         color_temperature, temp.R, temp.G, temp.B);
-        }
-
-        for (i = 0; i < size; i++) {
-                value = (i * 0xffff) / (size - 1);
-                data = g_new0 (GnomeRROutputClutItem, 1);
-                data->red = value * temp.R;
-                data->green = value * temp.G;
-                data->blue = value * temp.B;
-                g_ptr_array_add (clut, data);
-        }
-
-        /* apply the vcgt to this output */
-        ret = gcm_session_output_set_gamma (output, clut, error);
-        if (!ret)
-                goto out;
-out:
-        g_ptr_array_unref (clut);
-        return ret;
-}
-
 static GnomeRROutput *
 gcm_session_get_state_output_by_device (GsdColorState *state,
                                         CdDevice *device,
@@ -688,33 +471,6 @@ gcm_session_device_assign_profile_connect_cb (GObject *object,
                 }
         }
 
-        /* create a vcgt for this icc file */
-        ret = cd_profile_get_has_vcgt (profile);
-        if (ret) {
-                ret = gcm_session_device_set_gamma (output,
-                                                    profile,
-                                                    state->color_temperature,
-                                                    &error);
-                if (!ret) {
-                        g_warning ("failed to set %s gamma tables: %s",
-                                   cd_device_get_id (helper->device),
-                                   error->message);
-                        g_error_free (error);
-                        goto out;
-                }
-        } else {
-                ret = gcm_session_device_reset_gamma (output,
-                                                      state->color_temperature,
-                                                      &error);
-                if (!ret) {
-                        g_warning ("failed to reset %s gamma tables: %s",
-                                   cd_device_get_id (helper->device),
-                                   error->message);
-                        g_error_free (error);
-                        goto out;
-                }
-        }
-
         if (gnome_rr_output_supports_color_transform (output)) {
                 ret = gcm_set_csc_matrix (output,
                                           profile,
@@ -793,18 +549,6 @@ gcm_session_device_assign_connect_cb (GObject *object,
                         gdk_property_delete (state->gdk_window,
                                              gdk_atom_intern_static_string ("_ICC_PROFILE_IN_X_VERSION"));
                 }
-
-                /* reset, as we want linear profiles for profiling */
-                ret = gcm_session_device_reset_gamma (output,
-                                                      state->color_temperature,
-                                                      &error);
-                if (!ret) {
-                        g_warning ("failed to reset %s gamma tables: %s",
-                                   cd_device_get_id (device),
-                                   error->message);
-                        g_error_free (error);
-                        goto out;
-                }
                 goto out;
         }