1 files changed, 118 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_quad.c b/src/gallium/drivers/softpipe/sp_quad.c
new file mode 100644
index 00000000000..6bd468a51cf
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_quad.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 "sp_context.h"
+#include "sp_state.h"
+#include "pipe/p_shader_tokens.h"
+
+static void
+sp_push_quad_first(
+   struct softpipe_context *sp,
+   struct quad_stage       *quad )
+{
+   quad->next = sp->quad.first;
+   sp->quad.first = quad;
+}
+
+static void
+sp_build_depth_stencil(
+   struct softpipe_context *sp )
+{
+   if (sp->depth_stencil->stencil[0].enabled ||
+       sp->depth_stencil->stencil[1].enabled) {
+      sp_push_quad_first( sp, sp->quad.stencil_test );
+   }
+   else if (sp->depth_stencil->depth.enabled &&
+            sp->framebuffer.zsbuf) {
+      sp_push_quad_first( sp, sp->quad.depth_test );
+   }
+}
+
+void
+sp_build_quad_pipeline(struct softpipe_context *sp)
+{
+   boolean  early_depth_test =
+               sp->depth_stencil->depth.enabled &&
+               sp->framebuffer.zsbuf &&
+               !sp->depth_stencil->alpha.enabled &&
+               sp->fs->shader.output_semantic_name[0] != TGSI_SEMANTIC_POSITION;
+
+   /* build up the pipeline in reverse order... */
+
+   sp->quad.first = sp->quad.output;
+
+   if (sp->blend->colormask != 0xf) {
+      sp_push_quad_first( sp, sp->quad.colormask );
+   }
+
+   if (sp->blend->blend_enable ||
+       sp->blend->logicop_enable) {
+      sp_push_quad_first( sp, sp->quad.blend );
+   }
+
+   if (sp->framebuffer.num_cbufs == 1) {
+      /* the usual case: write to exactly one colorbuf */
+      sp->current_cbuf = 0;
+   }
+   else {
+      /* insert bufloop stage */
+      sp_push_quad_first( sp, sp->quad.bufloop );
+   }
+
+   if (sp->depth_stencil->depth.occlusion_count) {
+      sp_push_quad_first( sp, sp->quad.occlusion );
+   }
+
+   if (sp->rasterizer->poly_smooth ||
+       sp->rasterizer->line_smooth ||
+       sp->rasterizer->point_smooth) {
+      sp_push_quad_first( sp, sp->quad.coverage );
+   }
+
+   if (!early_depth_test) {
+      sp_build_depth_stencil( sp );
+   }
+
+   if (sp->depth_stencil->alpha.enabled) {
+      sp_push_quad_first( sp, sp->quad.alpha_test );
+   }
+
+   /* XXX always enable shader? */
+   if (1) {
+      sp_push_quad_first( sp, sp->quad.shade );
+   }
+
+   if (early_depth_test) {
+      sp_build_depth_stencil( sp );
+      sp_push_quad_first( sp, sp->quad.earlyz );
+   }
+
+   if (sp->rasterizer->poly_stipple_enable) {
+      sp_push_quad_first( sp, sp->quad.polygon_stipple );
+   }
+}