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
35 struct 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 */
44 static void
clear_flags(struct pipe_rasterizer_state * rast)45 clear_flags(struct pipe_rasterizer_state *rast)
46 {
47 rast->light_twoside = 0;
48 rast->offset_tri = 0;
49 }
50
51
52
53 static void *
llvmpipe_create_rasterizer_state(struct pipe_context * pipe,const struct pipe_rasterizer_state * rast)54 llvmpipe_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
97 static void
llvmpipe_bind_rasterizer_state(struct pipe_context * pipe,void * handle)98 llvmpipe_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
134 static void
llvmpipe_delete_rasterizer_state(struct pipe_context * pipe,void * rasterizer)135 llvmpipe_delete_rasterizer_state(struct pipe_context *pipe,
136 void *rasterizer)
137 {
138 FREE( rasterizer );
139 }
140
141
142
143 void
llvmpipe_init_rasterizer_funcs(struct llvmpipe_context * llvmpipe)144 llvmpipe_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