1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "pipe/p_defines.h"
29#include "util/u_memory.h"
30#include "lp_context.h"
31#include "lp_state.h"
32#include "lp_setup.h"
33#include "draw/draw_context.h"
34
35struct lp_rast_state {
36   struct pipe_rasterizer_state lp_state;
37   struct pipe_rasterizer_state draw_state;
38};
39
40/* State which might be handled in either the draw module or locally.
41 * This function is used to turn that state off in one of the two
42 * places.
43 */
44static void
45clear_flags(struct pipe_rasterizer_state *rast)
46{
47   rast->light_twoside = 0;
48   rast->offset_tri = 0;
49}
50
51
52
53static void *
54llvmpipe_create_rasterizer_state(struct pipe_context *pipe,
55                                 const struct pipe_rasterizer_state *rast)
56{
57   boolean need_pipeline;
58
59   /* Partition rasterizer state into what we want the draw module to
60    * handle, and what we'll look after ourselves.
61    */
62   struct lp_rast_state *state = MALLOC_STRUCT(lp_rast_state);
63   if (state == NULL)
64      return NULL;
65
66   memcpy(&state->draw_state, rast, sizeof *rast);
67   memcpy(&state->lp_state, rast, sizeof *rast);
68
69   /* We rely on draw module to do unfilled polyons, AA lines and
70    * points and stipple.
71    *
72    * Over time, reduce this list of conditions, and expand the list
73    * of flags which get cleared in clear_flags().
74    */
75   need_pipeline = (rast->fill_front != PIPE_POLYGON_MODE_FILL ||
76		    rast->fill_back != PIPE_POLYGON_MODE_FILL ||
77		    rast->point_smooth ||
78		    rast->line_smooth ||
79		    rast->line_stipple_enable ||
80		    rast->poly_stipple_enable);
81
82   /* If not using the pipeline, clear out the flags which we can
83    * handle ourselves.  If we *are* using the pipeline, do everything
84    * on the pipeline and clear those flags on our internal copy of
85    * the state.
86    */
87   if (need_pipeline)
88      clear_flags(&state->lp_state);
89   else
90      clear_flags(&state->draw_state);
91
92   return state;
93}
94
95
96
97static void
98llvmpipe_bind_rasterizer_state(struct pipe_context *pipe, void *handle)
99{
100   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
101   const struct lp_rast_state *state =
102      (const struct lp_rast_state *) handle;
103
104   if (state) {
105      llvmpipe->rasterizer = &state->lp_state;
106      draw_set_rasterizer_state(llvmpipe->draw, &state->draw_state, handle);
107
108      /* XXX: just pass lp_state directly to setup.
109       */
110      lp_setup_set_triangle_state( llvmpipe->setup,
111				   state->lp_state.cull_face,
112				   state->lp_state.front_ccw,
113				   state->lp_state.scissor,
114				   state->lp_state.gl_rasterization_rules);
115      lp_setup_set_flatshade_first( llvmpipe->setup,
116				    state->lp_state.flatshade_first);
117      lp_setup_set_line_state( llvmpipe->setup,
118			       state->lp_state.line_width);
119      lp_setup_set_point_state( llvmpipe->setup,
120				state->lp_state.point_size,
121				state->lp_state.point_size_per_vertex,
122				state->lp_state.sprite_coord_enable,
123				state->lp_state.sprite_coord_mode);
124   }
125   else {
126      llvmpipe->rasterizer = NULL;
127      draw_set_rasterizer_state(llvmpipe->draw, NULL, handle);
128   }
129
130   llvmpipe->dirty |= LP_NEW_RASTERIZER;
131}
132
133
134static void
135llvmpipe_delete_rasterizer_state(struct pipe_context *pipe,
136                                 void *rasterizer)
137{
138   FREE( rasterizer );
139}
140
141
142
143void
144llvmpipe_init_rasterizer_funcs(struct llvmpipe_context *llvmpipe)
145{
146   llvmpipe->pipe.create_rasterizer_state = llvmpipe_create_rasterizer_state;
147   llvmpipe->pipe.bind_rasterizer_state   = llvmpipe_bind_rasterizer_state;
148   llvmpipe->pipe.delete_rasterizer_state = llvmpipe_delete_rasterizer_state;
149}
150