Initial work for glClear(), clear color state.

4 files changed, 65 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_atom.c b/src/mesa/state_tracker/st_atom.c
index 8ac435041d..e1d187f2db 100644
--- a/src/mesa/state_tracker/st_atom.c
+++ b/src/mesa/state_tracker/st_atom.c
@@ -43,6 +43,7 @@
 static const struct st_tracked_state *atoms[] =
 {
    &st_update_framebuffer,
+   &st_update_clear_color,
    &st_update_clip,
    &st_update_fs,
    &st_update_point,
diff --git a/src/mesa/state_tracker/st_atom.h b/src/mesa/state_tracker/st_atom.h
index 56c33f3076..8c1219fefd 100644
--- a/src/mesa/state_tracker/st_atom.h
+++ b/src/mesa/state_tracker/st_atom.h
@@ -46,6 +46,7 @@ void st_validate_state( struct st_context *st );
 
 const struct st_tracked_state st_update_framebuffer;
 const struct st_tracked_state st_update_clip;
+const struct st_tracked_state st_update_clear_color;
 const struct st_tracked_state st_update_depth;
 const struct st_tracked_state st_update_fs;
 const struct st_tracked_state st_update_point;
diff --git a/src/mesa/state_tracker/st_atom_clear_color.c b/src/mesa/state_tracker/st_atom_clear_color.c
new file mode 100644
index 0000000000..adf730cd8c
--- /dev/null
+++ b/src/mesa/state_tracker/st_atom_clear_color.c
@@ -0,0 +1,62 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+ /*
+  * Authors:
+  *   Keith Whitwell <keith@tungstengraphics.com>
+  *   Brian Paul
+  */
+ 
+#include "st_context.h"
+#include "st_atom.h"
+#include "pipe/p_context.h"
+
+
+static void
+update_clear_color_state( struct st_context *st )
+{
+   struct pipe_clear_color_state clear;
+
+   clear.color[0] = st->ctx->Color.ClearColor[0];
+   clear.color[1] = st->ctx->Color.ClearColor[1];
+   clear.color[2] = st->ctx->Color.ClearColor[2];
+   clear.color[3] = st->ctx->Color.ClearColor[3];
+
+   if (memcmp(&clear, &st->state.clear_color, sizeof(clear)) != 0) {
+      st->state.clear_color = clear;
+      st->pipe->set_clear_color_state( st->pipe, &clear );
+   }
+}
+
+
+const struct st_tracked_state st_update_clear_color = {
+   .dirty = {
+      .mesa = _NEW_COLOR,
+      .st  = 0,
+   },
+   .update = update_clear_color_state
+};
diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 94388f1aee..0f1fa2327b 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -71,6 +71,7 @@ struct st_context
       struct pipe_fs_state     fs;
       struct pipe_alpha_test_state  alpha_test;
       struct pipe_blend_state  blend;
+      struct pipe_clear_color_state clear_color;
       struct pipe_clip_state   clip;
       struct pipe_depth_state  depth;
       struct pipe_point_state  point;