From 8f2888758129b0a40d71fa4ce10d606b4bcf7631 Mon Sep 17 00:00:00 2001
From: Brian <brian.paul@tungstengraphics.com>
Date: Wed, 30 May 2007 16:07:39 -0600
Subject: added depth(Z) state support

---
 src/mesa/softpipe/sp_context.h               |  3 +++
 src/mesa/softpipe/sp_defines.h               | 10 ++++++++++
 src/mesa/softpipe/sp_state.h                 |  9 +++++++++
 src/mesa/softpipe/state_tracker/st_atom.h    |  1 +
 src/mesa/softpipe/state_tracker/st_context.h |  1 +
 5 files changed, 24 insertions(+)

(limited to 'src/mesa/softpipe')

diff --git a/src/mesa/softpipe/sp_context.h b/src/mesa/softpipe/sp_context.h
index e047a9330b..e2b678f80f 100644
--- a/src/mesa/softpipe/sp_context.h
+++ b/src/mesa/softpipe/sp_context.h
@@ -43,6 +43,9 @@ struct softpipe_context {
    void (*set_clip_state)( struct softpipe_context *,
 			   const struct softpipe_clip_state * );
 
+   void (*set_depth_state)( struct softpipe_context *,
+                              const struct softpipe_depth_state * );
+
    void (*set_viewport)( struct softpipe_context *,
 			 const struct softpipe_viewport * );
 
diff --git a/src/mesa/softpipe/sp_defines.h b/src/mesa/softpipe/sp_defines.h
index bc88e3d71e..e1c773a407 100644
--- a/src/mesa/softpipe/sp_defines.h
+++ b/src/mesa/softpipe/sp_defines.h
@@ -89,4 +89,14 @@
 #define SP_STENCIL_OP_DECR_WRAP  6
 #define SP_STENCIL_OP_INVERT     7
 
+#define SP_DEPTH_FUNC_NEVER    0
+#define SP_DEPTH_FUNC_LESS     1
+#define SP_DEPTH_FUNC_EQUAL    2
+#define SP_DEPTH_FUNC_LEQUAL   3
+#define SP_DEPTH_FUNC_GREATER  4
+#define SP_DEPTH_FUNC_NOTEQUAL 5
+#define SP_DEPTH_FUNC_GEQUAL   6
+#define SP_DEPTH_FUNC_ALWAYS   7
+
+
 #endif
diff --git a/src/mesa/softpipe/sp_state.h b/src/mesa/softpipe/sp_state.h
index f7d904bffe..634b9e9868 100644
--- a/src/mesa/softpipe/sp_state.h
+++ b/src/mesa/softpipe/sp_state.h
@@ -100,6 +100,15 @@ struct softpipe_constant_buffer {
 };
 
 
+struct softpipe_depth_state
+{
+   GLuint enabled:1;   /**< depth test enabled? */
+   GLuint writemask:1; /**< allow depth buffer writes? */
+   GLuint func:3;      /**< depth test func */
+   GLfloat clear;      /**< Clear value in [0,1] (XXX correct place?) */
+};
+
+
 struct softpipe_blend_state {   
    GLuint blend_enable:1; 
 
diff --git a/src/mesa/softpipe/state_tracker/st_atom.h b/src/mesa/softpipe/state_tracker/st_atom.h
index 8dc7460d11..1d8da46336 100644
--- a/src/mesa/softpipe/state_tracker/st_atom.h
+++ b/src/mesa/softpipe/state_tracker/st_atom.h
@@ -46,6 +46,7 @@ void st_validate_state( struct st_context *st );
 
 const struct st_tracked_state st_update_cbuf;
 const struct st_tracked_state st_update_clip;
+const struct st_tracked_state st_update_depth;
 const struct st_tracked_state st_update_fs;
 const struct st_tracked_state st_update_setup;
 const struct st_tracked_state st_update_viewport;
diff --git a/src/mesa/softpipe/state_tracker/st_context.h b/src/mesa/softpipe/state_tracker/st_context.h
index 5ff10c1b1f..317d377371 100644
--- a/src/mesa/softpipe/state_tracker/st_context.h
+++ b/src/mesa/softpipe/state_tracker/st_context.h
@@ -71,6 +71,7 @@ struct st_context
       struct softpipe_blend_state  blend;
       struct softpipe_surface      cbuf;
       struct softpipe_clip_state   clip;
+      struct softpipe_depth_state  depth;
       struct softpipe_scissor_rect scissor;
       struct softpipe_poly_stipple poly_stipple;
       struct softpipe_stencil_state stencil;
-- 
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