summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/llvmpipe/lp_state_rasterizer.c
blob: 574f9e940efe7eaa4564a385597c5680ada5992c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
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.
 * 
 **************************************************************************/

#include "pipe/p_defines.h"
#include "util/u_memory.h"
#include "lp_context.h"
#include "lp_state.h"
#include "lp_setup.h"
#include "draw/draw_context.h"

struct lp_rast_state {
   struct pipe_rasterizer_state lp_state;
   struct pipe_rasterizer_state draw_state;
};

/* State which might be handled in either the draw module or locally.
 * This function is used to turn that state off in one of the two
 * places.
 */
static void
clear_flags(struct pipe_rasterizer_state *rast)
{
   rast->light_twoside = 0;
   rast->offset_tri = 0;
}



static void *
llvmpipe_create_rasterizer_state(struct pipe_context *pipe,
                                 const struct pipe_rasterizer_state *rast)
{
   boolean need_pipeline;

   /* Partition rasterizer state into what we want the draw module to
    * handle, and what we'll look after ourselves.
    */
   struct lp_rast_state *state = MALLOC_STRUCT(lp_rast_state);
   if (state == NULL)
      return NULL;

   memcpy(&state->draw_state, rast, sizeof *rast);
   memcpy(&state->lp_state, rast, sizeof *rast);

   /* We rely on draw module to do unfilled polyons, AA lines and
    * points and stipple.
    * 
    * Over time, reduce this list of conditions, and expand the list
    * of flags which get cleared in clear_flags().
    */
   need_pipeline = (rast->fill_front != PIPE_POLYGON_MODE_FILL ||
		    rast->fill_back != PIPE_POLYGON_MODE_FILL ||
		    rast->point_smooth ||
		    rast->line_smooth ||
		    rast->line_stipple_enable ||
		    rast->poly_stipple_enable);

   /* If not using the pipeline, clear out the flags which we can
    * handle ourselves.  If we *are* using the pipeline, do everything
    * on the pipeline and clear those flags on our internal copy of
    * the state.
    */
   if (need_pipeline)
      clear_flags(&state->lp_state);
   else
      clear_flags(&state->draw_state);

   return state;
}



static void
llvmpipe_bind_rasterizer_state(struct pipe_context *pipe, void *handle)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   const struct lp_rast_state *state =
      (const struct lp_rast_state *) handle;

   if (state) {
      llvmpipe->rasterizer = &state->lp_state;
      draw_set_rasterizer_state(llvmpipe->draw, &state->draw_state, handle);

      /* XXX: just pass lp_state directly to setup.
       */
      lp_setup_set_triangle_state( llvmpipe->setup,
				   state->lp_state.cull_face,
				   state->lp_state.front_ccw,
				   state->lp_state.scissor,
				   state->lp_state.gl_rasterization_rules);
      lp_setup_set_flatshade_first( llvmpipe->setup,
				    state->lp_state.flatshade_first);
      lp_setup_set_line_state( llvmpipe->setup,
			       state->lp_state.line_width);
      lp_setup_set_point_state( llvmpipe->setup,
				state->lp_state.point_size,
				state->lp_state.point_size_per_vertex,
				state->lp_state.sprite_coord_enable,
				state->lp_state.sprite_coord_mode);
   }
   else {
      llvmpipe->rasterizer = NULL;
      draw_set_rasterizer_state(llvmpipe->draw, NULL, handle);      
   }

   llvmpipe->dirty |= LP_NEW_RASTERIZER;
}


static void
llvmpipe_delete_rasterizer_state(struct pipe_context *pipe,
                                 void *rasterizer)
{
   FREE( rasterizer );
}



void
llvmpipe_init_rasterizer_funcs(struct llvmpipe_context *llvmpipe)
{
   llvmpipe->pipe.create_rasterizer_state = llvmpipe_create_rasterizer_state;
   llvmpipe->pipe.bind_rasterizer_state   = llvmpipe_bind_rasterizer_state;
   llvmpipe->pipe.delete_rasterizer_state = llvmpipe_delete_rasterizer_state;
}