backends/native: Replace MetaKmsCrtcGamma with MetaGammaLut

They are the same type now so there is no reason to keep both of them
around.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2861>

src/backends/meta-crtc.c

@@ -175,6 +175,52 @@ meta_gamma_lut_free (MetaGammaLut *lut)
   g_free (lut);
 }
 
+MetaGammaLut *
+meta_gamma_lut_new (int             size,
+                    const uint16_t *red,
+                    const uint16_t *green,
+                    const uint16_t *blue)
+{
+  MetaGammaLut *gamma;
+
+  gamma = g_new0 (MetaGammaLut, 1);
+  *gamma = (MetaGammaLut) {
+    .size = size,
+    .red = g_memdup2 (red, size * sizeof (*red)),
+    .green = g_memdup2 (green, size * sizeof (*green)),
+    .blue = g_memdup2 (blue, size * sizeof (*blue)),
+  };
+
+  return gamma;
+}
+
+MetaGammaLut *
+meta_gamma_lut_copy (const MetaGammaLut *gamma)
+{
+  g_return_val_if_fail (gamma != NULL, NULL);
+
+  return meta_gamma_lut_new (gamma->size, gamma->red, gamma->green, gamma->blue);
+}
+
+gboolean
+meta_gamma_lut_equal (const MetaGammaLut *gamma,
+                      const MetaGammaLut *other_gamma)
+{
+  if (gamma == other_gamma)
+    return TRUE;
+
+  if (gamma == NULL || other_gamma == NULL)
+    return FALSE;
+
+  return gamma->size == other_gamma->size &&
+         memcmp (gamma->red, other_gamma->red,
+                 gamma->size * sizeof (uint16_t)) == 0 &&
+         memcmp (gamma->green, other_gamma->green,
+                 gamma->size * sizeof (uint16_t)) == 0 &&
+         memcmp (gamma->blue, other_gamma->blue,
+                 gamma->size * sizeof (uint16_t)) == 0;
+}
+
 static void
 meta_crtc_set_property (GObject      *object,
                         guint         prop_id,

src/backends/meta-crtc.h

@@ -91,8 +91,21 @@ MetaGammaLut * meta_crtc_get_gamma_lut (MetaCrtc *crtc);
 void meta_crtc_set_gamma_lut (MetaCrtc           *crtc,
                               const MetaGammaLut *lut);
 
+META_EXPORT_TEST
 void meta_gamma_lut_free (MetaGammaLut *lut);
 
+MetaGammaLut * meta_gamma_lut_new (int             size,
+                                   const uint16_t *red,
+                                   const uint16_t *green,
+                                   const uint16_t *blue);
+
+META_EXPORT_TEST
+MetaGammaLut * meta_gamma_lut_copy (const MetaGammaLut *gamma);
+
+META_EXPORT_TEST
+gboolean meta_gamma_lut_equal (const MetaGammaLut *gamma,
+                               const MetaGammaLut *other_gamma);
+
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (MetaGammaLut, meta_gamma_lut_free)
 
 #endif /* META_CRTC_H */

src/backends/native/meta-crtc-kms.c

@@ -106,7 +106,7 @@ meta_crtc_kms_get_gamma_lut_size (MetaCrtc *crtc)
   return crtc_state->gamma.size;
 }
 
-const MetaKmsCrtcGamma *
+const MetaGammaLut *
 meta_crtc_kms_peek_gamma_lut (MetaCrtcKms *crtc_kms)
 {
   MetaMonitorManagerNative *monitor_manager_native =
@@ -124,39 +124,21 @@ meta_crtc_kms_get_gamma_lut (MetaCrtc *crtc)
   MetaMonitorManagerNative *monitor_manager_native =
     monitor_manager_from_crtc (crtc);
   const MetaKmsCrtcState *crtc_state;
-  MetaKmsCrtcGamma *crtc_gamma;
+  MetaGammaLut *gamma;
-  MetaGammaLut *lut;
 
-  crtc_gamma =
+  gamma =
     meta_monitor_manager_native_get_cached_crtc_gamma (monitor_manager_native,
                                                        crtc_kms);
-  if (!crtc_gamma)
+  if (!gamma)
     {
       crtc_state = meta_kms_crtc_get_current_state (kms_crtc);
-      crtc_gamma = crtc_state->gamma.value;
+      gamma = crtc_state->gamma.value;
     }
 
-  lut = g_new0 (MetaGammaLut, 1);
+  if (!gamma)
+    return meta_gamma_lut_new (0, NULL, NULL, NULL);
 
-  if (crtc_gamma)
+  return meta_gamma_lut_copy (gamma);
-    {
-      lut->size = crtc_gamma->size;
-      lut->red = g_memdup2 (crtc_gamma->red,
-                            lut->size * sizeof (uint16_t));
-      lut->green = g_memdup2 (crtc_gamma->green,
-                              lut->size * sizeof (uint16_t));
-      lut->blue = g_memdup2 (crtc_gamma->blue,
-                             lut->size * sizeof (uint16_t));
-    }
-  else
-    {
-      lut->size = 0;
-      lut->red = NULL;
-      lut->green = NULL;
-      lut->blue = NULL;
-    }
-
-  return lut;
 }
 
 static char *
@@ -231,7 +213,7 @@ meta_crtc_kms_set_gamma_lut (MetaCrtc           *crtc,
   ClutterActor *stage = meta_backend_get_stage (backend);
   const MetaKmsCrtcState *crtc_state;
   g_autofree char *gamma_ramp_string = NULL;
-  MetaKmsCrtcGamma *crtc_gamma;
+  MetaGammaLut *new_gamma;
 
   crtc_state = meta_kms_crtc_get_current_state (kms_crtc);
 
@@ -250,13 +232,13 @@ meta_crtc_kms_set_gamma_lut (MetaCrtc           *crtc,
               "Setting CRTC (%" G_GUINT64_FORMAT ") gamma to %s",
               meta_crtc_get_id (crtc), gamma_ramp_string);
 
-  crtc_gamma = meta_kms_crtc_gamma_new (lut->size,
+  new_gamma = meta_gamma_lut_copy (lut);
-                                        lut->red,
+  if (!new_gamma)
-                                        lut->green,
+    new_gamma = meta_gamma_lut_new (0, NULL, NULL, NULL);
-                                        lut->blue);
+
   meta_monitor_manager_native_update_cached_crtc_gamma (monitor_manager_native,
                                                         crtc_kms,
-                                                        crtc_gamma);
+                                                        new_gamma);
 
   g_signal_emit (crtc_kms, signals[GAMMA_LUT_CHANGED], 0);
   clutter_stage_schedule_update (CLUTTER_STAGE (stage));

src/backends/native/meta-crtc-kms.h

@@ -74,7 +74,7 @@ meta_crtc_kms_supports_format (MetaCrtcKms *crtc_kms,
 
 gboolean meta_crtc_kms_is_gamma_invalid (MetaCrtcKms *crtc_kms);
 
-const MetaKmsCrtcGamma * meta_crtc_kms_peek_gamma_lut (MetaCrtcKms *crtc_kms);
+const MetaGammaLut * meta_crtc_kms_peek_gamma_lut (MetaCrtcKms *crtc_kms);
 
 MetaCrtcKms * meta_crtc_kms_from_kms_crtc (MetaKmsCrtc *kms_crtc);
 

src/backends/native/meta-kms-crtc.c

@@ -111,7 +111,7 @@ read_gamma_state (MetaKmsCrtc       *crtc,
 
   crtc_state->gamma.size = drm_crtc->gamma_size;
   crtc_state->gamma.supported = drm_crtc->gamma_size != 0;
-  crtc_state->gamma.value = meta_kms_crtc_gamma_new (drm_crtc->gamma_size,
+  crtc_state->gamma.value = meta_gamma_lut_new (drm_crtc->gamma_size,
                                                 NULL, NULL, NULL);
 
   crtc_state->gamma.value->red = g_new0 (uint16_t, drm_crtc->gamma_size);
@@ -132,7 +132,7 @@ gamma_equal (MetaKmsCrtcState *state,
 {
   return state->gamma.size == other_state->gamma.size &&
          state->gamma.supported == other_state->gamma.supported &&
-         meta_kms_crtc_gamma_equal (state->gamma.value, other_state->gamma.value);
+         meta_gamma_lut_equal (state->gamma.value, other_state->gamma.value);
 }
 
 static MetaKmsResourceChanges
@@ -204,7 +204,7 @@ meta_kms_crtc_read_state (MetaKmsCrtc             *crtc,
     }
 
   g_clear_pointer (&crtc->current_state.gamma.value,
-                   meta_kms_crtc_gamma_free);
+                   meta_gamma_lut_free);
   crtc->current_state = crtc_state;
 
   meta_topic (META_DEBUG_KMS,
@@ -308,16 +308,19 @@ meta_kms_crtc_predict_state_in_impl (MetaKmsCrtc   *crtc,
   for (l = crtc_color_updates; l; l = l->next)
     {
       MetaKmsCrtcColorUpdate *color_update = l->data;
-      MetaKmsCrtcGamma *gamma = color_update->gamma.state;
+      MetaGammaLut *gamma = color_update->gamma.state;
 
       if (color_update->crtc != crtc)
         continue;
 
-      g_clear_pointer (&crtc->current_state.gamma.value, meta_kms_crtc_gamma_free);
+      if (color_update->gamma.has_update)
-      crtc->current_state.gamma.value = meta_kms_crtc_gamma_new (gamma->size,
+        {
-                                                                 gamma->red,
+          if (gamma)
-                                                                 gamma->green,
+            gamma = meta_gamma_lut_copy (gamma);
-                                                                 gamma->blue);
+
+          g_clear_pointer (&crtc->current_state.gamma.value, meta_gamma_lut_free);
+          crtc->current_state.gamma.value = gamma;
+        }
       break;
     }
 }
@@ -389,7 +392,7 @@ meta_kms_crtc_finalize (GObject *object)
 {
   MetaKmsCrtc *crtc = META_KMS_CRTC (object);
 
-  g_clear_pointer (&crtc->current_state.gamma.value, meta_kms_crtc_gamma_free);
+  g_clear_pointer (&crtc->current_state.gamma.value, meta_gamma_lut_free);
 
   G_OBJECT_CLASS (meta_kms_crtc_parent_class)->finalize (object);
 }

src/backends/native/meta-kms-crtc.h

@@ -25,17 +25,10 @@
 #include <xf86drmMode.h>
 
 #include "backends/native/meta-kms-types.h"
+#include "backends/meta-backend-types.h"
 #include "core/util-private.h"
 #include "meta/boxes.h"
 
-typedef struct _MetaKmsCrtcGamma
-{
-  int size;
-  uint16_t *red;
-  uint16_t *green;
-  uint16_t *blue;
-} MetaKmsCrtcGamma;
-
 typedef struct _MetaKmsCrtcState
 {
   gboolean is_active;
@@ -45,7 +38,7 @@ typedef struct _MetaKmsCrtcState
   drmModeModeInfo drm_mode;
 
   struct {
-    MetaKmsCrtcGamma *value;
+    MetaGammaLut *value;
     int size;
     gboolean supported;
   } gamma;
@@ -71,14 +64,4 @@ int meta_kms_crtc_get_idx (MetaKmsCrtc *crtc);
 META_EXPORT_TEST
 gboolean meta_kms_crtc_is_active (MetaKmsCrtc *crtc);
 
-void meta_kms_crtc_gamma_free (MetaKmsCrtcGamma *gamma);
-
-MetaKmsCrtcGamma * meta_kms_crtc_gamma_new (int             size,
-                                            const uint16_t *red,
-                                            const uint16_t *green,
-                                            const uint16_t *blue);
-
-gboolean meta_kms_crtc_gamma_equal (MetaKmsCrtcGamma *gamma,
-                                    MetaKmsCrtcGamma *other_gamma);
-
 #endif /* META_KMS_CRTC_H */

src/backends/native/meta-kms-impl-device-atomic.c

@@ -626,7 +626,7 @@ process_crtc_color_updates (MetaKmsImplDevice  *impl_device,
 
   if (color_update->gamma.has_update)
     {
-      MetaKmsCrtcGamma *gamma = color_update->gamma.state;
+      MetaGammaLut *gamma = color_update->gamma.state;
       struct drm_color_lut drm_color_lut[gamma->size];
       int i;
       uint32_t color_lut_blob_id;
@@ -647,7 +647,7 @@ process_crtc_color_updates (MetaKmsImplDevice  *impl_device,
         return FALSE;
 
       meta_topic (META_DEBUG_KMS,
-                  "[atomic] Setting CRTC (%u, %s) gamma, size: %d",
+                  "[atomic] Setting CRTC (%u, %s) gamma, size: %zu",
                   meta_kms_crtc_get_id (crtc),
                   meta_kms_impl_device_get_path (impl_device),
                   gamma->size);

src/backends/native/meta-kms-impl-device-simple.c

@@ -513,12 +513,12 @@ process_crtc_color_updates (MetaKmsImplDevice  *impl_device,
 
   if (color_update->gamma.has_update)
     {
-      MetaKmsCrtcGamma *gamma = color_update->gamma.state;
+      MetaGammaLut *gamma = color_update->gamma.state;
       int fd;
       int ret;
 
       meta_topic (META_DEBUG_KMS,
-                  "[simple] Setting CRTC %u (%s) gamma, size: %d",
+                  "[simple] Setting CRTC %u (%s) gamma, size: %zu",
                   meta_kms_crtc_get_id (crtc),
                   meta_kms_impl_device_get_path (impl_device),
                   gamma->size);

src/backends/native/meta-kms-update-private.h

@@ -34,7 +34,7 @@ typedef struct _MetaKmsCrtcColorUpdate
 
   struct {
     gboolean has_update;
-    MetaKmsCrtcGamma *state;
+    MetaGammaLut *state;
   } gamma;
 } MetaKmsCrtcColorUpdate;
 

src/backends/native/meta-kms-update.c

@@ -394,64 +394,22 @@ ensure_color_update (MetaKmsUpdate *update,
   return color_update;
 }
 
-void
-meta_kms_crtc_gamma_free (MetaKmsCrtcGamma *gamma)
-{
-  g_return_if_fail (gamma != NULL);
-
-  g_free (gamma->red);
-  g_free (gamma->green);
-  g_free (gamma->blue);
-  g_free (gamma);
-}
-
-MetaKmsCrtcGamma *
-meta_kms_crtc_gamma_new (int             size,
-                         const uint16_t *red,
-                         const uint16_t *green,
-                         const uint16_t *blue)
-{
-  MetaKmsCrtcGamma *gamma;
-
-  gamma = g_new0 (MetaKmsCrtcGamma, 1);
-  *gamma = (MetaKmsCrtcGamma) {
-    .size = size,
-    .red = g_memdup2 (red, size * sizeof (*red)),
-    .green = g_memdup2 (green, size * sizeof (*green)),
-    .blue = g_memdup2 (blue, size * sizeof (*blue)),
-  };
-
-  return gamma;
-}
-
-gboolean
-meta_kms_crtc_gamma_equal (MetaKmsCrtcGamma *gamma,
-                           MetaKmsCrtcGamma *other_gamma)
-{
-  return gamma->size == other_gamma->size &&
-         memcmp (gamma->red, other_gamma->red,
-                 gamma->size * sizeof (uint16_t)) == 0 &&
-         memcmp (gamma->green, other_gamma->green,
-                 gamma->size * sizeof (uint16_t)) == 0 &&
-         memcmp (gamma->blue, other_gamma->blue,
-                 gamma->size * sizeof (uint16_t)) == 0;
-}
-
 void
 meta_kms_update_set_crtc_gamma (MetaKmsUpdate      *update,
                                 MetaKmsCrtc        *crtc,
-                                int             size,
+                                const MetaGammaLut *gamma)
-                                const uint16_t *red,
-                                const uint16_t *green,
-                                const uint16_t *blue)
 {
   MetaKmsCrtcColorUpdate *color_update;
+  MetaGammaLut *gamma_update = NULL;
 
   g_assert (!meta_kms_update_is_locked (update));
   g_assert (meta_kms_crtc_get_device (crtc) == update->device);
 
+  if (gamma)
+    gamma_update = meta_gamma_lut_copy (gamma);
+
   color_update = ensure_color_update (update, crtc);
-  color_update->gamma.state = meta_kms_crtc_gamma_new (size, red, green, blue);
+  color_update->gamma.state = gamma_update;
   color_update->gamma.has_update = TRUE;
 }
 
@@ -459,7 +417,7 @@ static void
 meta_kms_crtc_color_updates_free (MetaKmsCrtcColorUpdate *color_update)
 {
   if (color_update->gamma.has_update)
-    g_clear_pointer (&color_update->gamma.state, meta_kms_crtc_gamma_free);
+    g_clear_pointer (&color_update->gamma.state, meta_gamma_lut_free);
 }
 
 void

src/backends/native/meta-kms-update.h

@@ -123,10 +123,7 @@ void meta_kms_update_mode_set (MetaKmsUpdate *update,
 
 void meta_kms_update_set_crtc_gamma (MetaKmsUpdate      *update,
                                      MetaKmsCrtc        *crtc,
-                                     int             size,
+                                     const MetaGammaLut *gamma);
-                                     const uint16_t *red,
-                                     const uint16_t *green,
-                                     const uint16_t *blue);
 
 void meta_kms_plane_assignment_set_fb_damage (MetaKmsPlaneAssignment *plane_assignment,
                                               const int              *rectangles,

src/backends/native/meta-monitor-manager-native.c

@@ -345,7 +345,7 @@ meta_monitor_manager_native_apply_monitors_config (MetaMonitorManager        *ma
   return TRUE;
 }
 
-MetaKmsCrtcGamma *
+MetaGammaLut *
 meta_monitor_manager_native_get_cached_crtc_gamma (MetaMonitorManagerNative *manager_native,
                                                    MetaCrtcKms              *crtc_kms)
 {
@@ -359,13 +359,13 @@ meta_monitor_manager_native_get_cached_crtc_gamma (MetaMonitorManagerNative *man
 void
 meta_monitor_manager_native_update_cached_crtc_gamma (MetaMonitorManagerNative *manager_native,
                                                       MetaCrtcKms              *crtc_kms,
-                                                      MetaKmsCrtcGamma         *crtc_gamma)
+                                                      MetaGammaLut             *gamma)
 {
   MetaCrtc *crtc = META_CRTC (crtc_kms);
 
   g_hash_table_replace (manager_native->crtc_gamma_cache,
                         GUINT_TO_POINTER (meta_crtc_get_id (crtc)),
-                        crtc_gamma);
+                        gamma);
 }
 
 static void
@@ -694,7 +694,7 @@ meta_monitor_manager_native_initable_init (GInitable    *initable,
   manager_native->crtc_gamma_cache =
     g_hash_table_new_full (NULL, NULL,
                            NULL,
-                           (GDestroyNotify) meta_kms_crtc_gamma_free);
+                           (GDestroyNotify) meta_gamma_lut_free);
 
   return TRUE;
 }

src/backends/native/meta-monitor-manager-native.h

@@ -43,11 +43,11 @@ void meta_monitor_manager_native_resume (MetaMonitorManagerNative *manager_nativ
 
 uint64_t meta_power_save_to_dpms_state (MetaPowerSave power_save);
 
-MetaKmsCrtcGamma * meta_monitor_manager_native_get_cached_crtc_gamma (MetaMonitorManagerNative *manager_native,
+MetaGammaLut * meta_monitor_manager_native_get_cached_crtc_gamma (MetaMonitorManagerNative *manager_native,
                                                                   MetaCrtcKms              *crtc_kms);
 
 void meta_monitor_manager_native_update_cached_crtc_gamma (MetaMonitorManagerNative *manager_native,
                                                            MetaCrtcKms              *crtc_kms,
-                                                           MetaKmsCrtcGamma         *gamma_lut);
+                                                           MetaGammaLut             *gamma);
 
 #endif /* META_MONITOR_MANAGER_NATIVE_H */

src/backends/native/meta-onscreen-native.c

@@ -1398,7 +1398,7 @@ meta_onscreen_native_prepare_frame (CoglOnscreen *onscreen,
 
   if (onscreen_native->is_gamma_lut_invalid)
     {
-      const MetaKmsCrtcGamma *gamma;
+      const MetaGammaLut *gamma;
 
       gamma = meta_crtc_kms_peek_gamma_lut (crtc_kms);
       if (gamma)
@@ -1408,10 +1408,7 @@ meta_onscreen_native_prepare_frame (CoglOnscreen *onscreen,
           kms_update = meta_kms_ensure_pending_update (kms, kms_device);
           meta_kms_update_set_crtc_gamma (kms_update,
                                           kms_crtc,
-                                          gamma->size,
+                                          gamma);
-                                          gamma->red,
-                                          gamma->green,
-                                          gamma->blue);
         }
     }
 

src/tests/native-kms-device.c

@@ -105,19 +105,8 @@ assert_crtc_state_equals (const MetaKmsCrtcState *crtc_state1,
                        crtc_state2->drm_mode.name);
     }
 
-  g_assert_cmpint (crtc_state1->gamma.value->size, ==, crtc_state1->gamma.value->size);
+  g_assert_true (meta_gamma_lut_equal (crtc_state1->gamma.value,
-  g_assert_cmpmem (crtc_state1->gamma.value->red,
+                                       crtc_state2->gamma.value));
-                   crtc_state1->gamma.value->size * sizeof (uint16_t),
-                   crtc_state2->gamma.value->red,
-                   crtc_state2->gamma.value->size * sizeof (uint16_t));
-  g_assert_cmpmem (crtc_state1->gamma.value->green,
-                   crtc_state1->gamma.value->size * sizeof (uint16_t),
-                   crtc_state2->gamma.value->green,
-                   crtc_state2->gamma.value->size * sizeof (uint16_t));
-  g_assert_cmpmem (crtc_state1->gamma.value->blue,
-                   crtc_state1->gamma.value->size * sizeof (uint16_t),
-                   crtc_state2->gamma.value->blue,
-                   crtc_state2->gamma.value->size * sizeof (uint16_t));
 }
 
 static int
@@ -213,15 +202,10 @@ copy_crtc_state (const MetaKmsCrtcState *crtc_state)
   g_assert_nonnull (crtc_state);
 
   new_state = *crtc_state;
-  new_state.gamma.value->red =
+  if (crtc_state->gamma.value)
-    g_memdup2 (new_state.gamma.value->red,
+    new_state.gamma.value = meta_gamma_lut_copy (crtc_state->gamma.value);
-               new_state.gamma.value->size * sizeof (uint16_t));
+  else
-  new_state.gamma.value->green =
+    new_state.gamma.value = NULL;
-    g_memdup2 (new_state.gamma.value->green,
-               new_state.gamma.value->size * sizeof (uint16_t));
-  new_state.gamma.value->blue =
-    g_memdup2 (new_state.gamma.value->blue,
-               new_state.gamma.value->size * sizeof (uint16_t));
 
   return new_state;
 }
@@ -249,11 +233,9 @@ copy_connector_state (const MetaKmsConnectorState *connector_state)
 }
 
 static void
-release_crtc_state (const MetaKmsCrtcState *crtc_state)
+release_crtc_state (MetaKmsCrtcState *crtc_state)
 {
-  g_free (crtc_state->gamma.value->red);
+  g_clear_pointer (&crtc_state->gamma.value, meta_gamma_lut_free);
-  g_free (crtc_state->gamma.value->green);
-  g_free (crtc_state->gamma.value->blue);
 }
 
 static void