[gtk/wip/chergert/glyphy: 18/20] gsk/gl: only clear glyph cache durign reclaimation

[Christian Hergert <chergert src gnome org>]

commit dedaf8c0980ee9bad27cb3d632e73a8eb57ad1ed
Author: Christian Hergert <chergert redhat com>
Date:   Tue Mar 15 15:55:30 2022 -0700

    gsk/gl: only clear glyph cache durign reclaimation
    
    We don't need to clear the front cache on every frame as we can clear it
    specifically when we do reclaimation to avoid unnecessary memset() calls.

 gsk/gl/gskglglyphlibrary.c          | 8 ++++----
 gsk/gl/gskgltexturelibrary.c        | 8 ++++++++
 gsk/gl/gskgltexturelibraryprivate.h | 1 +
 3 files changed, 13 insertions(+), 4 deletions(-)
---
diff --git a/gsk/gl/gskglglyphlibrary.c b/gsk/gl/gskglglyphlibrary.c
index b749384674..ee13198921 100644
--- a/gsk/gl/gskglglyphlibrary.c
+++ b/gsk/gl/gskglglyphlibrary.c
@@ -84,12 +84,12 @@ gsk_gl_glyph_value_free (gpointer data)
 }
 
 static void
-gsk_gl_glyph_library_begin_frame (GskGLTextureLibrary *library,
-                                  gint64               frame_id,
-                                  GPtrArray           *removed_atlases)
+gsk_gl_glyph_library_clear_cache (GskGLTextureLibrary *library)
 {
   GskGLGlyphLibrary *self = (GskGLGlyphLibrary *)library;
 
+  g_assert (GSK_IS_GL_GLYPH_LIBRARY (self));
+
   memset (self->front, 0, sizeof self->front);
 }
 
@@ -111,7 +111,7 @@ gsk_gl_glyph_library_class_init (GskGLGlyphLibraryClass *klass)
 
   object_class->finalize = gsk_gl_glyph_library_finalize;
 
-  library_class->begin_frame = gsk_gl_glyph_library_begin_frame;
+  library_class->clear_cache = gsk_gl_glyph_library_clear_cache;
 }
 
 static void
diff --git a/gsk/gl/gskgltexturelibrary.c b/gsk/gl/gskgltexturelibrary.c
index fadec60a0c..b0694e7afb 100644
--- a/gsk/gl/gskgltexturelibrary.c
+++ b/gsk/gl/gskgltexturelibrary.c
@@ -141,6 +141,7 @@ gsk_gl_texture_library_begin_frame (GskGLTextureLibrary *self,
                                     GPtrArray            *removed_atlases)
 {
   GHashTableIter iter;
+  gboolean drop_caches = FALSE;
 
   g_return_if_fail (GSK_IS_GL_TEXTURE_LIBRARY (self));
 
@@ -175,6 +176,8 @@ gsk_gl_texture_library_begin_frame (GskGLTextureLibrary *self,
                 if (dropped > 0)
                   g_message ("%s: Dropped %d items",
                              G_OBJECT_TYPE_NAME (self), dropped));
+
+      drop_caches |= dropped > 0;
     }
 
   if (frame_id % self->max_frame_age == 0)
@@ -208,7 +211,12 @@ gsk_gl_texture_library_begin_frame (GskGLTextureLibrary *self,
                                         g_hash_table_size (self->hash_table),
                                         atlased,
                                         g_hash_table_size (self->hash_table) - atlased));
+
+      drop_caches |= dropped > 0;
     }
+
+  if (drop_caches && GSK_GL_TEXTURE_LIBRARY_GET_CLASS (self)->clear_cache)
+    GSK_GL_TEXTURE_LIBRARY_GET_CLASS (self)->clear_cache (self);
 }
 
 static GskGLTexture *
diff --git a/gsk/gl/gskgltexturelibraryprivate.h b/gsk/gl/gskgltexturelibraryprivate.h
index bb1db12172..39276ff69d 100644
--- a/gsk/gl/gskgltexturelibraryprivate.h
+++ b/gsk/gl/gskgltexturelibraryprivate.h
@@ -103,6 +103,7 @@ typedef struct _GskGLTextureLibraryClass
   void (*begin_frame) (GskGLTextureLibrary *library,
                        gint64               frame_id,
                        GPtrArray           *removed_atlases);
+  void (*clear_cache) (GskGLTextureLibrary *library);
 } GskGLTextureLibraryClass;
 
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (GskGLTextureLibrary, g_object_unref)