From 946f432a08112148d743eb9faf6b27bb8cc7fa76 Mon Sep 17 00:00:00 2001
From: José Fonseca <jfonseca@vmware.com>
Date: Sun, 26 Jul 2009 23:44:38 +0100
Subject: llvmpipe: Fork softpipe for experimentation with llvm.

---
 src/gallium/drivers/llvmpipe/lp_quad_pipe.c | 118 ++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 src/gallium/drivers/llvmpipe/lp_quad_pipe.c

(limited to 'src/gallium/drivers/llvmpipe/lp_quad_pipe.c')

diff --git a/src/gallium/drivers/llvmpipe/lp_quad_pipe.c b/src/gallium/drivers/llvmpipe/lp_quad_pipe.c
new file mode 100644
index 0000000000..378acf8f86
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_quad_pipe.c
@@ -0,0 +1,118 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+
+#include "lp_context.h"
+#include "lp_state.h"
+#include "pipe/p_shader_tokens.h"
+
+static void
+lp_push_quad_first(
+   struct llvmpipe_context *lp,
+   struct quad_stage *quad,
+   uint i )
+{
+   quad->next = lp->quad[i].first;
+   lp->quad[i].first = quad;
+}
+
+static void
+lp_build_depth_stencil(
+   struct llvmpipe_context *lp,
+   uint i )
+{
+   if (lp->depth_stencil->stencil[0].enabled ||
+       lp->depth_stencil->stencil[1].enabled) {
+      lp_push_quad_first( lp, lp->quad[i].stencil_test, i );
+   }
+   else if (lp->depth_stencil->depth.enabled &&
+            lp->framebuffer.zsbuf) {
+      lp_push_quad_first( lp, lp->quad[i].depth_test, i );
+   }
+}
+
+void
+lp_build_quad_pipeline(struct llvmpipe_context *lp)
+{
+   uint i;
+
+   boolean early_depth_test =
+               lp->depth_stencil->depth.enabled &&
+               lp->framebuffer.zsbuf &&
+               !lp->depth_stencil->alpha.enabled &&
+               !lp->fs->info.uses_kill &&
+               !lp->fs->info.writes_z;
+
+   /* build up the pipeline in reverse order... */
+   for (i = 0; i < SP_NUM_QUAD_THREADS; i++) {
+      lp->quad[i].first = lp->quad[i].output;
+
+      if (lp->blend->colormask != 0xf) {
+         lp_push_quad_first( lp, lp->quad[i].colormask, i );
+      }
+
+      if (lp->blend->blend_enable ||
+          lp->blend->logicop_enable) {
+         lp_push_quad_first( lp, lp->quad[i].blend, i );
+      }
+
+      if (lp->active_query_count) {
+         lp_push_quad_first( lp, lp->quad[i].occlusion, i );
+      }
+
+      if (lp->rasterizer->poly_smooth ||
+          lp->rasterizer->line_smooth ||
+          lp->rasterizer->point_smooth) {
+         lp_push_quad_first( lp, lp->quad[i].coverage, i );
+      }
+
+      if (!early_depth_test) {
+         lp_build_depth_stencil( lp, i );
+      }
+
+      if (lp->depth_stencil->alpha.enabled) {
+         lp_push_quad_first( lp, lp->quad[i].alpha_test, i );
+      }
+
+      /* XXX always enable shader? */
+      if (1) {
+         lp_push_quad_first( lp, lp->quad[i].shade, i );
+      }
+
+      if (early_depth_test) {
+         lp_build_depth_stencil( lp, i );
+         lp_push_quad_first( lp, lp->quad[i].earlyz, i );
+      }
+
+#if !USE_DRAW_STAGE_PSTIPPLE
+      if (lp->rasterizer->poly_stipple_enable) {
+         lp_push_quad_first( lp, lp->quad[i].polygon_stipple, i );
+      }
+#endif
+   }
+}
+
-- 
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