First version of the softpipe rasterizer.

This will flesh out to hopefully acheive 3 things:
	- New software rasterizer for mesa
	- New driver model for mesa & dri with much smaller drivers
	- The basis for the cell driver.

It's got a long way to go yet, but will at least run trivial/tri.c.

1 files changed, 149 insertions, 0 deletions

diff --git a/src/mesa/softpipe/generic/g_context.h b/src/mesa/softpipe/generic/g_context.h
new file mode 100644
index 0000000000..24d467f2c3
--- /dev/null
+++ b/src/mesa/softpipe/generic/g_context.h
@@ -0,0 +1,149 @@
+/**************************************************************************
+ * 
+ * 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>
+ */
+
+#ifndef G_CONTEXT_H
+#define G_CONTEXT_H
+
+#include "glheader.h"
+
+#include "softpipe/sp_state.h"
+#include "softpipe/sp_context.h"
+
+
+
+struct generic_surface;
+struct draw_context;
+struct prim_stage;
+
+
+enum interp_mode {
+   INTERP_CONSTANT, 
+   INTERP_LINEAR, 
+   INTERP_PERSPECTIVE
+};
+
+
+#define G_NEW_VIEWPORT  0x1
+#define G_NEW_SETUP     0x2
+#define G_NEW_FS        0x4
+#define G_NEW_BLEND     0x8
+#define G_NEW_CBUF      0x10
+#define G_NEW_CLIP      0x20
+#define G_NEW_SCISSOR   0x40
+#define G_NEW_STIPPLE   0x80
+
+
+
+struct generic_context {     
+   struct softpipe_context softpipe;
+
+
+   /* The most recent drawing state as set by the driver:
+    */
+   struct softpipe_viewport     viewport;
+   struct softpipe_setup_state  setup;
+   struct softpipe_fs_state     fs;
+   struct softpipe_blend_state  blend;
+   struct softpipe_surface      cbuf;
+   struct softpipe_clip_state   clip;
+   struct softpipe_scissor_rect scissor;
+   struct softpipe_poly_stipple poly_stipple;
+   GLuint dirty;
+
+
+   /* Cbuf derived state??? 
+    */
+   struct generic_surface *cbuf_surface;
+
+   /* Clip derived state:
+    */
+   GLfloat plane[12][4];
+   GLuint nr_planes;
+
+   /* Setup derived state.  TODO: this should be passed in the program
+    * tokens as parameters to DECL instructions.
+    * 
+    * For now we just set colors to CONST on flatshade, textures to
+    * perspective always and everything else to linear.
+    */
+   enum interp_mode interp[VF_ATTRIB_MAX];
+
+
+   /* FS + setup derived state:
+    */
+   GLuint fp_attr_to_slot[VF_ATTRIB_MAX];
+   GLuint vf_attr_to_slot[VF_ATTRIB_MAX];
+   GLuint nr_attrs;
+   GLuint nr_frag_attrs;
+   GLuint attr_mask;
+
+   GLboolean need_z;
+   GLboolean need_w;
+
+   /* Stipple derived state:
+    */
+   GLubyte stipple_masks[16][16];
+
+
+   /* The software clipper/setup engine.  
+    */
+   struct {
+      struct prim_stage *setup;
+      struct prim_stage *unfilled;
+      struct prim_stage *twoside;
+      struct prim_stage *clip;
+      struct prim_stage *flatshade;
+      struct prim_stage *offset;
+      struct prim_stage *cull;
+
+      struct prim_stage *first;
+
+      GLenum prim;
+      GLuint vertex_size;
+   } prim;
+
+   /* Temp kludge:
+    */
+   struct draw_context *draw;
+};
+
+
+
+
+static INLINE struct generic_context *
+generic_context( struct softpipe_context *softpipe )
+{
+   return (struct generic_context *)softpipe;
+}
+
+
+
+
+#endif