1 files changed, 236 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_rast.h b/src/gallium/drivers/llvmpipe/lp_rast.h
new file mode 100644
index 00000000000..e4c56f153fc
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_rast.h
@@ -0,0 +1,236 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * 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 VMWARE 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.
+ *
+ **************************************************************************/
+
+/**
+ * The rast code is concerned with rasterization of command bins.
+ * Each screen tile has a bin associated with it.  To render the
+ * scene we iterate over the tile bins and execute the commands
+ * in each bin.
+ * We'll do that with multiple threads...
+ */
+
+
+#ifndef LP_RAST_H
+#define LP_RAST_H
+
+#include "pipe/p_compiler.h"
+#include "lp_jit.h"
+
+
+struct lp_rasterizer;
+struct lp_scene;
+struct lp_scene_queue;
+struct lp_fence;
+struct cmd_bin;
+struct pipe_screen;
+
+/** For sub-pixel positioning */
+#define FIXED_ORDER 4
+#define FIXED_ONE (1<<FIXED_ORDER)
+
+
+/**
+ * Rasterization state.
+ * Objects of this type are put into the shared data bin and pointed
+ * to by commands in the per-tile bins.
+ */
+struct lp_rast_state {
+   /* State for the shader.  This also contains state which feeds into
+    * the fragment shader, such as blend color and alpha ref value.
+    */
+   struct lp_jit_context jit_context;
+   
+   /* The shader itself.  Probably we also need to pass a pointer to
+    * the tile color/z/stencil data somehow:
+    * jit_function[0] skips the triangle in/out test code
+    * jit_function[1] does triangle in/out testing
+     */
+   lp_jit_frag_func jit_function[2];
+
+   boolean opaque;
+};
+
+
+/**
+ * Coefficients necessary to run the shader at a given location.
+ * First coefficient is position.
+ * These pointers point into the bin data buffer.
+ */
+struct lp_rast_shader_inputs {
+   float (*a0)[4];
+   float (*dadx)[4];
+   float (*dady)[4];
+
+   /* edge/step info for 3 edges and 4x4 block of pixels */
+   PIPE_ALIGN_VAR(16) int step[3][16];
+};
+
+
+/**
+ * Rasterization information for a triangle known to be in this bin,
+ * plus inputs to run the shader:
+ * These fields are tile- and bin-independent.
+ * Objects of this type are put into the setup_context::data buffer.
+ */
+struct lp_rast_triangle {
+   /* one-pixel sized trivial accept offsets for each plane */
+   int ei1;                   
+   int ei2;
+   int ei3;
+
+   /* one-pixel sized trivial reject offsets for each plane */
+   int eo1;                   
+   int eo2;
+   int eo3;
+
+   /* y deltas for vertex pairs (in fixed pt) */
+   int dy12;
+   int dy23;
+   int dy31;
+
+   /* x deltas for vertex pairs (in fixed pt) */
+   int dx12;
+   int dx23;
+   int dx31;
+
+   /* edge function values at minx,miny ?? */
+   int c1, c2, c3;
+
+   /* inputs for the shader */
+   PIPE_ALIGN_VAR(16) struct lp_rast_shader_inputs inputs;
+};
+
+
+
+struct lp_rasterizer *lp_rast_create( struct pipe_screen *screen,
+                                      struct lp_scene_queue *empty );
+
+void lp_rast_destroy( struct lp_rasterizer * );
+
+unsigned lp_rast_get_num_threads( struct lp_rasterizer * );
+
+void lp_rasterize_scene( struct lp_rasterizer *rast,
+			 struct lp_scene *scene,
+			 const struct pipe_framebuffer_state *fb,
+			 bool write_depth );
+
+
+
+union lp_rast_cmd_arg {
+   const struct lp_rast_shader_inputs *shade_tile;
+   const struct lp_rast_triangle *triangle;
+   const struct lp_rast_state *set_state;
+   uint8_t clear_color[4];
+   unsigned clear_zstencil;
+   struct lp_fence *fence;
+};
+
+
+/* Cast wrappers.  Hopefully these compile to noops!
+ */
+static INLINE const union lp_rast_cmd_arg
+lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
+{
+   union lp_rast_cmd_arg arg;
+   arg.shade_tile = shade_tile;
+   return arg;
+}
+
+static INLINE const union lp_rast_cmd_arg
+lp_rast_arg_triangle( const struct lp_rast_triangle *triangle )
+{
+   union lp_rast_cmd_arg arg;
+   arg.triangle = triangle;
+   return arg;
+}
+
+static INLINE const union lp_rast_cmd_arg
+lp_rast_arg_state( const struct lp_rast_state *state )
+{
+   union lp_rast_cmd_arg arg;
+   arg.set_state = state;
+   return arg;
+}
+
+static INLINE const union lp_rast_cmd_arg
+lp_rast_arg_fence( struct lp_fence *fence )
+{
+   union lp_rast_cmd_arg arg;
+   arg.fence = fence;
+   return arg;
+}
+
+
+static INLINE const union lp_rast_cmd_arg
+lp_rast_arg_null( void )
+{
+   union lp_rast_cmd_arg arg;
+   arg.set_state = NULL;
+   return arg;
+}
+
+
+
+/**
+ * Binnable Commands.
+ * These get put into bins by the setup code and are called when
+ * the bins are executed.
+ */
+
+void lp_rast_clear_color( struct lp_rasterizer *, 
+                          unsigned thread_index,
+                          const union lp_rast_cmd_arg );
+
+void lp_rast_clear_zstencil( struct lp_rasterizer *, 
+                             unsigned thread_index,
+                             const union lp_rast_cmd_arg );
+
+void lp_rast_load_color( struct lp_rasterizer *, 
+                         unsigned thread_index,
+                         const union lp_rast_cmd_arg );
+
+void lp_rast_load_zstencil( struct lp_rasterizer *, 
+                            unsigned thread_index,
+                            const union lp_rast_cmd_arg );
+
+void lp_rast_set_state( struct lp_rasterizer *, 
+                        unsigned thread_index,
+                        const union lp_rast_cmd_arg );
+
+void lp_rast_triangle( struct lp_rasterizer *, 
+                       unsigned thread_index,
+                       const union lp_rast_cmd_arg );
+
+void lp_rast_shade_tile( struct lp_rasterizer *,
+                         unsigned thread_index,
+                         const union lp_rast_cmd_arg );
+
+void lp_rast_fence( struct lp_rasterizer *,
+                    unsigned thread_index,
+                    const union lp_rast_cmd_arg );
+
+#endif