[gtk/wip/chergert/glproto: 397/493] try to iterate fewer attachment slots

[Christian Hergert <chergert src gnome org>]

commit dbae4d78536f24a0a270e0e107c156302f622a25
Author: Christian Hergert <chergert redhat com>
Date:   Thu Feb 4 14:51:16 2021 -0800

    try to iterate fewer attachment slots

 gsk/next/gskglattachmentstate.c        |  9 +++++++--
 gsk/next/gskglattachmentstateprivate.h |  3 +--
 gsk/next/gskglcommandqueue.c           | 33 ++++++++++++++++++++-------------
 3 files changed, 28 insertions(+), 17 deletions(-)
---
diff --git a/gsk/next/gskglattachmentstate.c b/gsk/next/gskglattachmentstate.c
index 37d0c347fb..b05cc975a1 100644
--- a/gsk/next/gskglattachmentstate.c
+++ b/gsk/next/gskglattachmentstate.c
@@ -31,6 +31,7 @@ gsk_gl_attachment_state_new (void)
 
   self->fbo.changed = FALSE;
   self->fbo.id = 0;
+  self->n_changed = 0;
 
   /* Initialize textures, assume we are 2D by default since it
    * doesn't really matter until we bind something other than
@@ -81,9 +82,13 @@ gsk_gl_attachment_state_bind_texture (GskGLAttachmentState *self,
       attach->target = target;
       attach->texture = texture;
       attach->id = id;
-      attach->changed = TRUE;
       attach->initial = FALSE;
-      self->has_texture_change = TRUE;
+
+      if (attach->changed == FALSE)
+        {
+          attach->changed = TRUE;
+          self->n_changed++;
+        }
     }
 }
 
diff --git a/gsk/next/gskglattachmentstateprivate.h b/gsk/next/gskglattachmentstateprivate.h
index ef45119893..3144371ce9 100644
--- a/gsk/next/gskglattachmentstateprivate.h
+++ b/gsk/next/gskglattachmentstateprivate.h
@@ -52,13 +52,12 @@ struct _GskGLAttachmentState
 {
   GskGLBindFramebuffer fbo;
   GskGLBindTexture textures[8];
-  guint has_texture_change : 1;
+  guint n_changed;
 };
 
 GskGLAttachmentState *gsk_gl_attachment_state_new              (void);
 GskGLAttachmentState *gsk_gl_attachment_state_ref              (GskGLAttachmentState *self);
 void                  gsk_gl_attachment_state_unref            (GskGLAttachmentState *self);
-void                  gsk_gl_attachment_state_free             (GskGLAttachmentState *self);
 void                  gsk_gl_attachment_state_bind_texture     (GskGLAttachmentState *self,
                                                                 GLenum                target,
                                                                 GLenum                texture,
diff --git a/gsk/next/gskglcommandqueue.c b/gsk/next/gskglcommandqueue.c
index a9684633fd..d28e08b475 100644
--- a/gsk/next/gskglcommandqueue.c
+++ b/gsk/next/gskglcommandqueue.c
@@ -442,24 +442,31 @@ gsk_gl_command_queue_end_draw (GskGLCommandQueue *self)
     }
 
   /* Track the bind attachments that changed */
-  batch->draw.bind_offset = self->batch_binds->len;
-  batch->draw.bind_count = 0;
-  for (guint i = 0; i < G_N_ELEMENTS (self->attachments->textures); i++)
+  if (self->attachments->n_changed > 0)
     {
-      GskGLBindTexture *texture = &self->attachments->textures[i];
-
-      if (texture->changed && texture->id > 0)
-        {
-          GskGLCommandBind bind;
+      GskGLCommandBind *bind;
 
-          texture->changed = FALSE;
+      batch->draw.bind_offset = self->batch_binds->len;
+      batch->draw.bind_count = self->attachments->n_changed;
 
-          bind.texture = texture->texture;
-          bind.id = texture->id;
+      g_array_set_size (self->batch_binds, self->batch_binds->len + batch->draw.bind_count);
+      bind = &g_array_index (self->batch_binds, GskGLCommandBind, self->batch_binds->len - 
batch->draw.bind_count);
 
-          g_array_append_val (self->batch_binds, bind);
+      for (guint i = 0;
+           (self->attachments->n_changed > 0 &&
+            i < G_N_ELEMENTS (self->attachments->textures));
+           i++)
+        {
+          GskGLBindTexture *texture = &self->attachments->textures[i];
 
-          batch->draw.bind_count++;
+          if (texture->changed)
+            {
+              texture->changed = FALSE;
+              bind->texture = texture->texture;
+              bind->id = texture->id;
+              bind++;
+              self->attachments->n_changed--;
+            }
         }
     }