[cogl/wip/virtual-framebuffer: 20/37] stash: track fb color mask like other fb state

[Robert Bragg <rbragg src gnome org>]

commit 0af2a88ff0cfbb704e144951504c3bc47eef0728
Author: Robert Bragg <robert linux intel com>
Date:   Mon Nov 21 17:58:45 2011 +0000

    stash: track fb color mask like other fb state

 cogl/cogl-framebuffer-private.h |    6 +++-
 cogl/cogl-framebuffer.c         |   54 ++++++++++++++++++++++++++------------
 2 files changed, 41 insertions(+), 19 deletions(-)
---
diff --git a/cogl/cogl-framebuffer-private.h b/cogl/cogl-framebuffer-private.h
index 232edca..2d1329d 100644
--- a/cogl/cogl-framebuffer-private.h
+++ b/cogl/cogl-framebuffer-private.h
@@ -71,7 +71,8 @@ typedef enum _CoglFramebufferStateIndex
   COGL_FRAMEBUFFER_STATE_INDEX_DITHER     = 3,
   COGL_FRAMEBUFFER_STATE_INDEX_MODELVIEW  = 4,
   COGL_FRAMEBUFFER_STATE_INDEX_PROJECTION = 5,
-  COGL_FRAMEBUFFER_STATE_INDEX_MAX        = 6
+  COGL_FRAMEBUFFER_STATE_INDEX_COLOR_MASK = 6,
+  COGL_FRAMEBUFFER_STATE_INDEX_MAX        = 7
 } CoglFramebufferStateIndex;
 
 typedef enum _CoglFramebufferState
@@ -81,7 +82,8 @@ typedef enum _CoglFramebufferState
   COGL_FRAMEBUFFER_STATE_CLIP       = 1<<2,
   COGL_FRAMEBUFFER_STATE_DITHER     = 1<<3,
   COGL_FRAMEBUFFER_STATE_MODELVIEW  = 1<<4,
-  COGL_FRAMEBUFFER_STATE_PROJECTION = 1<<5
+  COGL_FRAMEBUFFER_STATE_PROJECTION = 1<<5,
+  COGL_FRAMEBUFFER_STATE_COLOR_MASK = 1<<6
 } CoglFramebufferState;
 
 #define COGL_FRAMEBUFFER_STATE_ALL ((1<<COGL_FRAMEBUFFER_STATE_INDEX_MAX) - 1)
diff --git a/cogl/cogl-framebuffer.c b/cogl/cogl-framebuffer.c
index 6886243..7803f4f 100644
--- a/cogl/cogl-framebuffer.c
+++ b/cogl/cogl-framebuffer.c
@@ -1102,17 +1102,6 @@ notify_buffers_changed (CoglFramebuffer *old_draw_buffer,
 
   if (old_draw_buffer && new_draw_buffer)
     {
-      /* If the two draw framebuffers have a different color mask then
-         we need to ensure the logic ops are reflushed the next time
-         something is drawn */
-      if (cogl_framebuffer_get_color_mask (old_draw_buffer) !=
-          cogl_framebuffer_get_color_mask (new_draw_buffer))
-        {
-          ctx->current_pipeline_changes_since_flush |=
-            COGL_PIPELINE_STATE_LOGIC_OPS;
-          ctx->current_pipeline_age--;
-        }
-
       /* If we're switching from onscreen to offscreen and the last
          flush pipeline is using backface culling then we also need to
          reflush the cull face state because the winding order of the
@@ -1420,6 +1409,17 @@ _cogl_framebuffer_compare_projection_state (CoglFramebuffer *a,
 }
 
 static unsigned long
+_cogl_framebuffer_compare_color_mask_state (CoglFramebuffer *a,
+                                            CoglFramebuffer *b)
+{
+  if (cogl_framebuffer_get_color_mask (a) !=
+      cogl_framebuffer_get_color_mask (b))
+    return COGL_FRAMEBUFFER_STATE_COLOR_MASK;
+  else
+    return 0;
+}
+
+static unsigned long
 _cogl_framebuffer_compare (CoglFramebuffer *a,
                            CoglFramebuffer *b,
                            CoglFramebufferState state)
@@ -1456,6 +1456,10 @@ _cogl_framebuffer_compare (CoglFramebuffer *a,
           differences |=
             _cogl_framebuffer_compare_projection_state (draw_buffer);
           break;
+        case COGL_FRAMEBUFFER_STATE_INDEX_COLOR_MASK:
+          differences |=
+            _cogl_framebuffer_compare_color_mask_state (draw_buffer);
+          break;
         default:
           g_warn_if_reached ();
         }
@@ -1532,6 +1536,20 @@ _cogl_framebuffer_flush_projection_state (CoglFramebuffer *framebuffer)
                                   COGL_MATRIX_PROJECTION);
 }
 
+static void
+_cogl_framebuffer_flush_color_mask_state (CoglFramebuffer *framebuffer)
+{
+  CoglContext *context = framebuffer->context;
+
+  /* The color mask state is really owned by a CoglPipeline so to
+   * ensure the color mask is updated the next time we draw something
+   * we need to make sure the logic ops for the pipeline are
+   * re-flushed... */
+  context->current_pipeline_changes_since_flush |=
+    COGL_PIPELINE_STATE_LOGIC_OPS;
+  context->current_pipeline_age--;
+}
+
 void
 _cogl_framebuffer_flush_state (CoglFramebuffer *draw_buffer,
                                CoglFramebuffer *read_buffer,
@@ -1635,6 +1653,9 @@ _cogl_framebuffer_flush_state (CoglFramebuffer *draw_buffer,
         case COGL_FRAMEBUFFER_STATE_INDEX_PROJECTION:
           _cogl_framebuffer_flush_projection_state (draw_buffer);
           break;
+        case COGL_FRAMEBUFFER_STATE_INDEX_COLOR_MASK:
+          _cogl_framebuffer_flush_color_mask_state (draw_buffer);
+          break;
         default:
           g_warn_if_reached ();
         }
@@ -1687,15 +1708,14 @@ void
 cogl_framebuffer_set_color_mask (CoglFramebuffer *framebuffer,
                                  CoglColorMask color_mask)
 {
-  _COGL_GET_CONTEXT (ctx, NO_RETVAL);
+  /* XXX: Currently color mask changes don't go through the journal */
+  _cogl_framebuffer_flush_journal (framebuffer);
 
-  cogl_flush (); /* XXX: Currently color mask changes don't go through the journal */
   framebuffer->color_mask = color_mask;
 
-  /* Make sure the ColorMask is updated when the next primitive is drawn */
-  ctx->current_pipeline_changes_since_flush |=
-    COGL_PIPELINE_STATE_LOGIC_OPS;
-  ctx->current_pipeline_age--;
+  if (framebuffer->context->current_draw_buffer == framebuffer)
+    framebuffer->context->current_draw_buffer_changes |=
+      COGL_FRAMEBUFFER_STATE_COLOR_MASK;
 }
 
 gboolean